Change-over switch

Abstract

The utility model provides a change-over switch. The change-over switch comprises a switch body and an expansion knapsack, wherein the expansion knapsack is detachably connected to the switch body; the switch body is provided with a first wiring port, a second wiring port and a switching pick; the first wiring port is connected between electric equipment and a first power supply and is used for enabling the first power supply to provide electric energy for the electric equipment; the second wiring port is connected between the electric equipment and a second power supply and is used for enabling the second power supply to provide electric energy for the electric equipment; the switching pick is connected with the first power supply and the second power supply and is used for controlling the connection and disconnection between the first power supply and the electric equipment and the connection and disconnection between the second power supply and the electric equipment; and a third wiring port is formed in the expansion backpack and is electrically connected with the second power supply, so that the expansion backpack automatically controls the on-off of the second power supply according to the state of the first power supply. The automatic control according to the state is the function expansion of the change-over switch in the related technology, and the operation flexibility is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a conversion switch. Background Art

[0002] There are two power lines in the transfer switch: the main power supply and the backup power supply. The main power supply is generally the first power supply provided by the municipal government, and the backup power supply is generally the second power supply, such as a generator system. Under normal circumstances, the automatic transfer switch supplies power to the electrical equipment through the main power supply. When the main power supply is cut off due to a fault or power maintenance, it will switch to the backup power supply to supply power to the electrical equipment. This ensures that the power system can continue to operate normally even if the main power supply fails.

[0003] In the related art, the switching between the main power supply and the backup power supply requires manual switching by a switch paddle on the transfer switch or automatic switching by a control system set in the transfer switch, resulting in low operational flexibility of the transfer switch and insufficient to meet all user needs. In addition, the control system of the backup power supply is generally set in the transfer switch, which is not convenient for flexible control, resulting in low reliability of the transfer switch. Utility Model Content

[0004] The present application provides a conversion switch to solve the problem that the second power supply cannot be flexibly controlled, resulting in low operational flexibility of the conversion switch.

[0005] In a first aspect, the present application provides a conversion switch, comprising: a switch body and an expansion backpack, wherein the expansion backpack is detachably connected to the switch body: the switch body is provided with a first wiring port, a second wiring port and a switching paddle; the first wiring port is connected between the electrical device and the first power supply, and is used to enable the first power supply to provide electrical energy to the electrical device; the second wiring port is connected between the electrical device and the second power supply, and is used to enable the second power supply to provide electrical energy to the electrical device; the switching paddle is connected to the first power supply and the second power supply, and is used to control the on and off between the first power supply and the electrical device, and the on and off between the second power supply and the electrical device; a third wiring port is provided on the expansion backpack, and the third wiring port is electrically connected to the second power supply, so that the expansion backpack automatically controls the on and off of the second power supply according to the state of the first power supply.

[0006] According to the first aspect, the conversion switch includes: a switch body, an expansion backpack and a connection component. The first wiring port provided on the switch body is connected between the power-consuming device and the first power supply, so that the first power supply provides power to the power-consuming device; the second wiring port provided on the switch body is connected between the power-consuming device and the second power supply, so that the second power supply provides power to the power-consuming device; the switching paddle provided on the switch body is connected to the first power supply and the second power supply, so as to control the on-off between the first power supply and the power-consuming device, and the on-off between the second power supply and the power-consuming device, so as to ensure that the power-consuming device can still be normally powered when the first power supply or the second power supply fails and loses power. The expansion backpack is detachably connected to the switch body; the third wiring port provided on the expansion backpack is electrically connected to the second power supply, and when the first power supply is in a fault-off state, the expansion backpack controls the connection between the second power supply and the power-consuming device; when the first power supply recovers from the fault state, the expansion backpack controls the disconnection between the second power supply and the power-consuming device; so that the expansion backpack can automatically control the on-off of the second power supply according to the state of the first power supply, thereby improving the reliability of the conversion switch. To sum up, the expansion backpack expands the functions of the conversion switch in the related technology and improves the operational flexibility of the conversion switch; and the expansion backpack can be detachably connected to the switch body, and the operator can choose whether to connect the expansion backpack to the switch body, that is, he can choose whether to enable the conversion switch to have an automatic switching function, which further improves the operational flexibility of the conversion switch.

[0007] In a possible design, the expansion backpack is detachably connected to the switch body via a connecting component; the connecting component includes a slide groove and a slide bar, the slide groove is provided on the switch body, and the slide bar is provided on the expansion backpack; the slide bar is slidably connected in the slide groove, so that the expansion backpack can be detachably connected to the switch body; a limiting structure is provided on the slide bar, and the limiting structure is clamped in the slide groove along a first direction, for limiting the slide bar from escaping from the slide groove along the first direction, and the first direction is perpendicular to the sliding direction of the slide bar.

[0008] The connection assembly composed of the slide bar and the slide slot provided by this embodiment is simple in structure and easy to operate, which facilitates the operator to flexibly inspect the second power supply and the expansion backpack that controls the on and off of the second power supply, so as to further ensure the reliability of the conversion switch. The limiting structure provided on the slide bar is clamped in the slide slot along the first direction, so that the slide bar cannot escape from the slide slot along the first direction, thereby preventing the expansion backpack from being disconnected from the switch body when the third wiring port is in a connected state, thereby affecting the reliability of the conversion switch.

[0009] In a possible design, the expansion backpack is provided with a communication interface, a first delay knob and a second delay knob; the communication interface is used to transmit data in the conversion switch; the first delay knob is used to control a first lead time, and the first lead time is the preparation time from the first power supply to supply power to the electrical device to the switching time when the second power supply is used to supply power to the electrical device; the rotation angle of the first delay knob corresponds to the duration of the first lead time; the second delay knob is used to control the second lead time, and the first lead time is the preparation time from the second power supply to supply power to the electrical device to the switching time when the first power supply is used to supply power to the electrical device; the rotation angle of the second delay knob corresponds to the duration of the second lead time.

[0010] The communication interface provided by this embodiment enables the transfer switch to have a remote monitoring function, thereby improving the operational flexibility of the transfer switch. The first delay knob enables the transfer switch to avoid erroneous operation caused by instantaneous power failure of the first power supply, thereby improving the reliability of the transfer switch; the second delay knob enables the transfer switch to avoid erroneous operation caused by instantaneous connection of the first power supply, thereby improving the reliability of the transfer switch. The angle of rotation of the first delay knob corresponds to the duration of the first lead time, so that the first delay knob can flexibly control the duration of the first lead time; the angle of rotation of the second delay knob corresponds to the duration of the first lead time, so that the second delay knob can flexibly control the duration of the second lead time; the operator can rotate the first delay knob and the second delay knob to a suitable angle according to actual needs to obtain a suitable second lead time, thereby improving the operational flexibility of the transfer switch.

[0011] In a possible design, an indicator light is provided on the expansion backpack, and the indicator light is used to indicate the connectivity status between the electrical device and the first power source and the second power source.

[0012] Through the implementation, the connectivity status between the electrical device and the first power supply and the second power supply is indicated by the indicator light, so as to determine whether a fault occurs in the connection between the first power supply or the second power supply and the electrical device, thereby enabling the operator to discover and perform repairs in time to ensure the reliability of the transfer switch. On the other hand, the function of the indicator light expands the function of the transfer switch, thereby improving the operational flexibility of the transfer switch.

[0013] In a possible design, the expansion backpack includes a backpack shell, a first positioning structure, a first circuit board, a second positioning structure and a second circuit board; the backpack shell is a shell structure with a accommodating cavity, including a connecting panel and a side panel assembly, and the side panel assembly is connected between the connecting panel and the switch body along the first direction; the side panel assembly includes two oppositely arranged first side panels and two oppositely arranged second side panels, and the two slide bars are respectively arranged at the bottom of the two first side panels, and the bottom is an end away from the connecting panel; the first positioning structure is fixed in the accommodating cavity and used to position the first circuit board; the first circuit board is detachably connected to the first positioning structure, the panel of the first circuit board faces the connecting panel, and the third wiring port and the communication interface are both provided on the connecting panel; the second positioning structure is fixed in the accommodating cavity and used to position the second circuit board; the second circuit board is detachably connected to the second positioning structure, the panel of the second circuit board faces one of the first side panels, and the first delay knob, the second delay knob and the indicator light are all arranged on the one of the first side panels.

[0014] The expansion backpack provided by this embodiment includes a backpack shell, a first positioning structure, a first circuit board, a second positioning structure and a second circuit board; the backpack shell is a shell structure with a housing cavity, including a connection panel and a side panel assembly, and the space in the housing cavity provides an installation position for the first circuit board, the second circuit board, the first positioning structure and the second positioning structure; the connection panel, two first side panels and two second side panels of the housing cavity are protective shells for the first circuit board, the second circuit board, the first positioning structure and the second positioning structure. The first side panel in the side panel assembly is connected between the connection panel and the switch body along a first direction, and two slide bars are respectively arranged at the bottom of the two first side panels. When the expansion backpack is slidably connected to the switch body, the top surface of the switch body serves as the bottom surface of the container, so that the conversion switch composed of the expansion backpack and the switch body is an integral closed structure. The first positioning structure is fixed in the accommodating cavity, and the first circuit board is connected to the first positioning structure, so that the panel of the first circuit board is set toward the connection panel, so that the panel of the first circuit board can be connected to the third wiring port and the communication interface, and the first circuit board and the first positioning structure are detachably connected, so the first circuit board can be disassembled at any time for replacement or maintenance to maintain the control function of the first circuit board, thereby ensuring the reliability of the conversion switch. The second positioning structure is fixed in the accommodating cavity, and the second circuit board is connected to the second positioning structure, so that the panel of the second circuit board can be set toward a first side panel, so that the panel of the second circuit board can be connected to the first delay knob, the second delay knob and the indicator light, and the second circuit board and the second positioning structure are detachably connected, so the second circuit board can be disassembled at any time for replacement or maintenance to maintain the control function of the second circuit board, thereby ensuring the reliability of the conversion switch.

[0015] In a possible design, the first positioning structure includes: a first support shaft, a second support shaft, a third support shaft, a fourth support shaft, a first bolt, and a second bolt; the bottom of the first support shaft is fixed to the connection panel, the top of the first support shaft is provided with a first positioning pin, and the first support shaft is located on the first diagonal line of the panel of the first circuit board; the bottom of the second support shaft is fixed to the connection panel, the top of the second support shaft is provided with a second positioning pin, and the second support shaft is located on the first diagonal line of the panel of the first circuit board; the first diagonal line is provided with a first connecting hole and a second connecting hole, the first positioning pin is sleeved in the first connecting hole, and the second positioning pin is sleeved in the first connecting hole. The positioning pin is sleeved in the second connecting hole; the bottom of the third support shaft is fixed on the connecting panel, the top of the third support shaft is provided with a first threaded hole, and the third support shaft is located on the second diagonal line of the panel of the first circuit board; the bottom of the fourth support shaft is fixed on the connecting panel, the top of the fourth support shaft is provided with a second threaded hole, and the fourth support shaft is located on the second diagonal line of the panel of the first circuit board; the third connecting hole and the fourth connecting hole are provided on the second diagonal line, the first bolt is sleeved in the third connecting hole and screwed in the first threaded hole, and the second bolt is sleeved in the fourth connecting hole and screwed in the second threaded hole.

[0016] The first positioning structure provided by this embodiment includes: a first support shaft, a second support shaft, a third support shaft, a fourth support shaft, a first bolt and a second bolt; the first support shaft and the second support shaft are both located on the first diagonal line of the panel of the first circuit board, the bottoms of the first support shaft and the second support shaft are fixed on the connecting panel, and the first positioning pin and the second positioning pin arranged on the top of the first support shaft and the second support shaft respectively pass through the first connecting hole and the second connecting hole arranged on the first diagonal line; the third support shaft and the fourth support shaft are both located on the second diagonal line of the panel of the first circuit board, the bottoms of the third support shaft and the fourth support shaft are fixed on the connecting panel, the tops of the third support shaft and the fourth support shaft are provided with a first threaded hole and a second threaded hole, and the first bolt and the second bolt are respectively sleeved on the third connecting hole and the fourth connecting hole arranged on the second diagonal line, and then respectively screwed into the first threaded hole and the second threaded hole. The first positioning pin, the second positioning pin, the first bolt and the second bolt are respectively inserted into the first connecting hole, the second connecting hole, the third connecting hole and the fourth connecting hole, thereby limiting the movement of the first circuit board within the plane where the panel of the first circuit board is located; the first bolt and the second bolt are respectively screwed into the first threaded hole and the second threaded hole, thereby limiting the movement of the first circuit board along the height of the first support axis, the second support axis, the third support axis and the fourth support axis, thereby completely fixing the first circuit board in the accommodating cavity, enabling the first circuit board to be connected to the third wiring port and the communication interface accordingly, thereby ensuring the reliability of the conversion switch.

[0017] In a possible design, the second positioning structure includes: a first limiting component, a second limiting component, a third bolt and a first nut; the first limiting component is fixed to one side of the connection panel along a second direction, and the second direction is the direction in which the two second side panels are relatively arranged; the second limiting component is fixed to the other side of the connection panel along the second direction; one end of the second circuit board is inserted into the limiting groove of the first limiting component, and the other end of the second circuit board is inserted into the limiting groove of the second limiting component; a fifth connecting hole is provided on the first side panel, and a sixth connecting hole is provided on the second circuit board; the third bolt is sleeved in the fifth connecting hole and the sixth connecting hole, and the first nut is screwed on the third bolt from the bottom of the third bolt to lock the third bolt.

[0018] The second positioning structure provided by this embodiment includes a first limiting assembly, a second limiting assembly, a third bolt and a first nut; the first limiting assembly and the second limiting assembly are respectively fixed on both sides of the connection panel along the second direction, and the second direction is the direction in which the two second side panels are relatively arranged; the two ends of the second circuit board are respectively inserted into the limiting grooves of the first limiting assembly and the second limiting assembly, thereby limiting the movement of the second limiting assembly between the two first side panels; the first side panel is provided with a fifth connecting hole, and the second circuit board is provided with a sixth connecting hole; the third bolt is sleeved in the fifth connecting hole and the sixth connecting hole, and the first nut is screwed on the third bolt from the bottom of the third bolt, so that when the second circuit board moves toward the opening direction of the limiting groove, the third bolt and the sixth connecting hole provided on the second connecting plate abut against each other to prevent the second circuit board from coming out of the opening of the limiting groove; thereby the second circuit board is completely fixed in the accommodating cavity, so that the second circuit board can be correspondingly connected with the first delay knob, the second delay knob and the indicator light, thereby ensuring the reliability of the conversion switch.

[0019] In a possible design, the switching switch also includes a test button, one end of which is connected to the panel of the second circuit board, for testing whether the first power supply and the second power supply can be smoothly switched; the other end of the test button passes through the first side panel and extends to the outside of the accommodating cavity.

[0020] According to the embodiment, one end of the test button is connected to the panel of the second circuit board to test whether the first power supply and the second power supply can be smoothly switched; the other end of the test button passes through the first side panel and extends to the outside of the accommodating cavity, so that the operator can perform manual operation outside the accommodating cavity to control the switching between the first power supply and the second power supply, thereby testing the switching structure between the first power supply and the second power supply to ensure that the first power supply and the second power supply in the switching switch can be smoothly switched, thereby improving the reliability of the switching switch. On the other hand, the test function of the test button expands the function of the switching switch, thereby improving the operational flexibility of the switching switch.

[0021] In a possible design, the test button is located at one end of the second circuit board; and the width of the limiting groove of the first limiting component is greater than the width of the limiting groove of the second limiting component.

[0022] According to the embodiment, since the test button is located at one end of the second circuit board, and one end of the second circuit board is inserted into the limiting groove of the first limiting component, the width of the limiting groove of the first component is greater than the width of the limiting groove of the second limiting component, so that there is a larger assembly space in the limiting groove of the first limiting component, so that the test button can smoothly pass through the limiting groove and extend out of the accommodating cavity during the assembly process, and it is also convenient for the second circuit board provided with the test button to be disassembled and repaired.

[0023] In a possible design, the first limiting assembly further includes a limiting grid; one end of the limiting grid is fixed to the connecting panel, and the other end of the limiting grid is provided with a snap-in groove, and the snap-in groove is used to snap-in the first nut.

[0024] The embodiment provides that the first limit assembly also includes a limit grid, one end of which is fixed on the connection panel, and the other end of which is provided with a clamping groove; when the first nut is screwed on the third bolt, and the first nut and the third bolt are in a locked state, any one of the hexagonal edges of the first nut is clamped in the clamping groove, so that the first nut cannot be further screwed or screwed in the opposite direction, thereby preventing the connection between the first nut and the third bolt from loosening due to external force, thereby completely fixing the second circuit board in the accommodating cavity, and enabling the second circuit board to be connected to the first delay knob, the second delay knob and the indicator light accordingly, thereby ensuring the reliability of the conversion switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a conversion switch provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of a switch body provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of an expansion backpack provided in an embodiment of the present application;

[0029] Figure 4 for Figure 3 The main view;

[0030] Figure 5 for Figure 3 Other directions of view;

[0031] Figure 6 for Figure 5 Exploded view of;

[0032] Figure 7 A structural schematic diagram and a partial enlarged view of a first positioning structure and a second positioning structure provided in an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 100-conversion switch;

[0035] 1- switch body; 1a- first wiring port; 1b- second wiring port;

[0036] 2-expansion backpack; 2a-third wiring port; 2b-communication interface; 2c-first delay knob; 2d-second delay knob; 2e-indicator light; 2f-test button;

[0037] 21-backpack shell; 211-connection panel; 212-first side panel; 2122-fifth connection hole; 213-second side panel;

[0038] 22-first positioning structure; 221-first support shaft; 2211-first positioning pin; 222-second support shaft; 2221-second positioning pin; 223-third support shaft; 2231-first threaded hole; 224-fourth support shaft; 2241-second threaded hole; 225-first bolt; 226-second bolt;

[0039] 23-first circuit board; 231-first connection hole; 232-second connection hole; 233-third connection hole; 234-fourth connection hole;

[0040] 24-second positioning structure; 241-first limiting assembly; 242-second limiting assembly; 243-third bolt; 244-first nut; 245-limiting grid; 2451-clamping groove;

[0041] 25-second circuit board; 251-sixth connecting hole;

[0042] 3-connecting assembly; 31-sliding groove; 32-sliding bar; 321-limiting structure;

[0043] X-first direction;

[0044] Y - Second direction. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0047] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. For example, in the description of the present application, the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0051] In addition, the expressions of the indicated directions, such as the X direction, the Y direction, and the Z direction, used to illustrate the operation and construction of the components of the present embodiment are not absolute but relative, and although these indications are appropriate when the components of the battery pack are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0052] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0053] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0054] In the description of the present application, 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, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] like Figure 1 As shown, an embodiment of the first aspect of the present application provides a conversion switch 100, comprising: a switch body 1 and an expansion backpack 2, the expansion backpack 2 is detachably connected to the switch body 1; the switch body 1 is provided with a first wiring port 1a, a second wiring port 1b and a switching paddle (not shown in the figure); the first wiring port 1a is connected between an electrical device (not shown in the figure) and a first power supply (not shown in the figure), and is used to enable the first power supply to provide electrical energy to the electrical device, and the first power supply is the first power supply; the second wiring port 1b is connected between the electrical device and the second power supply (not shown in the figure), and is used to enable the second power supply to provide electrical energy to the electrical device, and the second power supply is the second power supply; the switching paddle is connected to the first power supply and the second power supply, and is used to control the on and off between the first power supply and the electrical device, and the on and off between the second power supply and the electrical device; a third wiring port 2a is provided on the expansion backpack 2, and the third wiring port 2a is electrically connected to the second power supply, so that the expansion backpack 2 automatically controls the on and off of the second power supply according to the state of the first power supply.

[0056] Specifically, the switch body 1 can be a dual-power conversion switch 100 commonly seen on the market, which is used to switch between two power supplies. The operator switches the power supply of the electrical equipment from the first power supply to the second power supply, or from the second power supply to the first power supply by toggling the switch paddle to ensure normal power supply when the first power supply or the second power supply fails and loses power.

[0057] Among them, the first wiring port 1a is connected between the power-consuming device and the first power supply, and is used for the first power supply to provide power to the power-consuming device; the second wiring port 1b is connected between the power-consuming device and the second power supply, and is used for the second power supply to provide power to the power-consuming device.

[0058] The switch paddle can be switched between a first position and a second position. When the switch paddle is in the first position, the connection between the first power source and the power device is disconnected, and the connection between the second power source and the power device is connected, and the second power source provides power to the power device. When the switch paddle is in the second position, the connection between the second power source and the power device is disconnected, and the connection between the first power source and the power device is connected, and the first power source provides power to the power device.

[0059] The expansion backpack 2 is a structure connected to the switch body 1 for expanding the functions of the conversion switch 100. The expansion backpack 2 can be a control system newly added to the conversion switch 100, so that the conversion switch 100 can automatically control the on and off of the second power supply according to the state of the first power supply on the basis of switching the first power supply and the second power supply by switching the paddle. For example, when the first power supply is in a fault power-off state, the expansion backpack 2 can control the connection between the second power supply and the power-consuming device; when the first power supply recovers from the fault state, the expansion backpack 2 can control the connection between the second power supply and the power-consuming device. Thereby improving the operational flexibility and reliability of the conversion switch 100. Among them, the third wiring port 2a is connected between the second power supply and the expansion backpack 2, so that the expansion backpack 2 automatically controls the on and off of the second power supply according to the state of the first power supply.

[0060] Specifically, the expansion backpack 2 automatically controls the on and off of the second power supply through electrical signals. When the first power supply is in a faulty power-off state, the expansion backpack 2 receives a first electrical signal, which is used to control the connection between the second power supply and the electrical equipment; when the first power supply recovers from the faulty state, the expansion backpack 2 receives a second electrical signal, which is used to control the disconnection between the second power supply and the electrical equipment.

[0061] Exemplarily, the first power source is generally an uninterruptible power supply provided by a municipal power system, and the second power source may be various types of generators sold on the market.

[0062] The conversion switch 100 provided by the embodiment of the first aspect of the present application includes: a switch body 1 and an expansion backpack 2. The first wiring port 1a provided on the switch body 1 is connected between the power-consuming device and the first power supply, and is used to enable the first power supply to provide power to the power-consuming device; the second wiring port 1b provided on the switch body 1 is connected between the power-consuming device and the second power supply, and is used to enable the second power supply to provide power to the power-consuming device; the switching paddle provided on the switch body 1 is connected to the first power supply and the second power supply, and is used to control the on-off between the first power supply and the power-consuming device, and the on-off between the second power supply and the power-consuming device, so as to ensure that the power-consuming device can still be normally powered when the first power supply or the second power supply fails and loses power. The expansion backpack 2 is detachably connected to the switch body 1; the third wiring port 2a provided on the expansion backpack 2 is electrically connected to the second power supply, and when the first power supply is in a faulty power-off state, the expansion backpack 2 controls the connection between the second power supply and the electrical equipment; when the first power supply recovers from the faulty state and is connected, the expansion backpack 2 controls the disconnection between the second power supply and the electrical equipment; the expansion backpack 2 can automatically control the on and off of the second power supply according to the state of the first power supply, thereby improving the reliability of the conversion switch. In summary, the expansion backpack 2 has expanded the functions of the conversion switch in the related art and improved the operational flexibility of the conversion switch; and the expansion backpack 2 is detachably connected to the switch body 1, and the operator can choose whether to connect the expansion backpack 2 to the switch body 1, that is, can choose whether to enable the conversion switch 100 to have an automatic switching function, further improving the operational flexibility of the conversion switch 100.

[0063] In some embodiments, Figure 2-Figure 4 As shown, the expansion backpack 2 is detachably connected to the switch body 1 through the connecting component 3; the connecting component 3 includes a slide groove 31 and a slide bar 32, the slide groove 31 is opened on the switch body 1, and the slide bar 32 is opened on the expansion backpack 2; the slide bar 32 is slidably connected in the slide groove 31, so that the expansion backpack 2 can be detachably connected to the switch body 1; a limiting structure 321 is provided on the slide bar 32, and the limiting structure 321 is clamped in the slide groove 31 along the first direction X, for limiting the slide bar 32 from escaping from the slide groove 31 along the first direction X, and the first direction X is perpendicular to the sliding direction of the slide bar 32.

[0064] The connecting component 3 connects the switch body 1 and the expansion backpack 2 together, so that the switch body 1 and the expansion backpack 2 form an integral structure. The slide bar 32 is provided on the expansion backpack 2, and the slide groove 31 is provided in the slide groove 31. The slide bar 32 is slidably connected in the slide groove 31, so that there is relative sliding between the expansion backpack 2 and the switch body 1. When the slide bar 32 slides into the slide groove 31, a connection is established between the expansion backpack 2 and the switch body 1. When the slide bar 32 slides out of the slide groove 31, the connection between the expansion backpack 2 and the switch body 1 no longer exists, so that the expansion backpack 2 and the switch body 1 can be separated, thereby realizing a detachable connection between the expansion backpack 2 and the switch body 1.

[0065] Furthermore, while achieving a detachable connection, when the expansion backpack 2 is connected to the switch body 1, the stability of the detachable connection should also be ensured to prevent the expansion backpack 2 from being affected by external forces and escaping from the switch body 1 in directions other than the sliding direction, thereby affecting the second power supply connected to the third wiring port 2a as a backup power supply to the electrical equipment, thereby affecting the reliability of the conversion switch 100.

[0066] Specifically, when the slide bar 32 is slidably connected in the slide groove 31, the inner wall of the slide groove 31 abuts against the outer wall of the slide bar 32, which is used to limit the movement of the slide bar 32 along the width direction of the slide groove 31. Therefore, it is only necessary to prevent the slide bar 32 from escaping from the opening direction of the slide groove 31, which is perpendicular to the sliding direction, namely the first direction X mentioned above.

[0067] For example, Figure 4 and Figure 5 As shown, due to process limitations, the cross section of the slide bar 32 is semicircular; the cross section of the slide groove 31 is circular. Therefore, when the slide bar 32 is slidably connected in the slide groove 31, only one side of the slide bar 32 is in contact with the inner wall of the slide groove 31, so the slide bar 32 can easily slip out of the slide groove 31 along the first direction X under the action of external force. At this time, a limiting structure 321 with a semicircular cross section is set on the other side of the slide bar 32, so that the limiting structure 321 and the cross section form a full circle with the cross section of the slide bar 32, and completely fit with the inner wall of the slide groove 31, thereby preventing the slide bar 32 from slipping out of the slide groove 31 along the first direction X under the action of external force.

[0068] The connection assembly 3 composed of the slide bar 32 and the slide groove 31 provided by this embodiment is simple in structure and easy to operate, which facilitates the operator to flexibly inspect and repair the second power supply and the expansion backpack 2 that controls the on and off of the second power supply, so as to further ensure the reliability of the conversion switch 100. In addition, the limiting structure 321 provided on the slide bar 32 is clamped in the slide groove 31 along the first direction X, so that the slide bar 32 cannot escape from the slide groove 31 along the first direction X, thereby preventing the expansion backpack 2 from being disconnected from the switch body 1 when the third wiring port 2a is in a connected state, thereby affecting the reliability of the conversion switch 100.

[0069] In some embodiments, Figure 3 and Figure 4 As shown, the expansion backpack 2 is provided with a communication interface 2b, a first delay knob 2c and a second delay knob 2d; the communication interface 2b is used to transmit data in the conversion switch 100.

[0070] The communication interface 2b on the transfer switch 100 is used to connect or integrate the transfer switch 100 with other devices or systems for data communication and information exchange. It allows the device to transmit data with external devices, control systems or networks to achieve information sharing and control operations.

[0071] Specifically, the communication interface 2b on the transfer switch 100 can realize functions such as data transmission, remote monitoring and control, data collection and analysis, etc. For example, the communication interface 2b can be used to collect and analyze the connection status between the first connection port 1a, the second connection port 1b, and the third connection port 2a and the electrical device, and transmit the connection status to the user, so that the transfer switch 100 has a remote monitoring function, which improves the operational flexibility of the transfer switch 100.

[0072] Exemplarily, the communication interface 2b is a 485 communication interface 2b, which has a wider communication rate range, a longer signal transmission distance, and good anti-interference ability, making the user's remote monitoring of the switching switch 100 more stable and preventing misoperation due to interference factors, thereby improving the reliability of the switching switch 100.

[0073] The first delay knob 2c is used to control the first lead time, which is the preparation time from the first power supply providing electrical energy to the electrical device to switching to the second power supply providing electrical energy to the electrical device; the rotation angle of the first delay knob 2c corresponds to the duration of the first lead time.

[0074] Specifically, the time when the expansion backpack 2 receives the first electrical signal is t1, the time when the expansion backpack 2 controls the line between the second power supply and the power-consuming device to be connected is t2, and the first lead time is t2-t1.

[0075] For example, the first power supply is generally an uninterruptible power supply provided by the municipal power system, which is a large-scale centralized power supply system. Therefore, the first power supply may experience a momentary power outage due to excessive load, etc. The momentary power outage generally lasts only 1-2 seconds and does not belong to the situation where the first power supply fails.

[0076] Therefore, the first lead time is controlled so that it is greater than the time of the instantaneous power outage. Thus, when the first power source is momentarily powered off, the conversion switch 100 does not need to switch power between the first power source and the second power source, so that the conversion switch 100 can avoid erroneous operation caused by the instantaneous power outage, thereby improving the reliability of the conversion switch 100.

[0077] The second delay knob 2d is used to control the second lead time. The first lead time is the preparation time from the second power supply supplying electric energy to the electric device to switching to the first power supply supplying electric energy to the electric device. The rotation angle of the second delay knob 2d corresponds to the duration of the second lead time.

[0078] Specifically, the time when the expansion backpack 2 receives the second electrical signal is t3, the time when the expansion backpack 2 controls the line between the second power supply and the power-consuming device to be disconnected is t4, and the second lead time is t4-t3.

[0079] Exemplarily, the second power source can be various types of generators sold on the market. Since the electricity cost of the generator is greater than the electricity cost of the municipal power system, when the municipal power system is restored, the second power source needs to be switched to the first power source to reduce the electricity cost of the electrical equipment. However, since the municipal power system is a large-scale centralized power supply system, when the operator is troubleshooting the municipal power system, there will be a transient connection between the first power source and the electrical equipment. The transient connection generally only lasts for 1-2 seconds and does not mean that the first power source has been restored.

[0080] Therefore, the second lead time is controlled so that it is greater than the instantaneous connection time, so that when the first power source is instantaneously connected, the conversion switch 100 does not need to switch the power between the second power source and the first power source, so that the conversion switch 100 can avoid erroneous operation caused by the instantaneous connection, thereby improving the reliability of the conversion switch 100.

[0081] Furthermore, different rotation angles of the first delay knob 2c indicate different durations of the first lead time. For example, when the first delay knob 2c is rotated 30°, the first lead time is 2s, and when the first delay knob is rotated 60°, the first lead time is 4s. The operator can rotate the first delay knob 2c to a suitable angle according to actual needs to obtain a suitable first lead time, thereby improving the operational flexibility of the transfer switch 100.

[0082] Similarly, different rotation angles of the second delay knob 2d indicate different durations of the second lead time. For example, when the second delay knob 2d is rotated 30°, the second lead time is 2s, and when the second delay knob is rotated 60°, the second lead time is 4s. The operator can rotate the second delay knob 2d to a suitable angle according to actual needs to obtain a suitable second lead time, thereby improving the operational flexibility of the transfer switch 100.

[0083] Through the communication interface 2b provided by this embodiment, the transfer switch 100 has a remote monitoring function, which improves the operational flexibility of the transfer switch 100. The first delay knob 2c enables the transfer switch 100 to avoid erroneous operation caused by instantaneous power failure of the first power supply, thereby improving the reliability of the transfer switch 100; the second delay knob 2d enables the transfer switch 100 to avoid erroneous operation caused by instantaneous connection of the first power supply, thereby improving the reliability of the transfer switch 100. The rotation angle of the first delay knob 2c corresponds to the duration of the first lead time, so that the first delay knob 2c can flexibly control the duration of the first lead time; the rotation angle of the second delay knob 2d corresponds to the duration of the first lead time, so that the second delay knob can flexibly control the duration of the second lead time; the operator can rotate the first delay knob 2c and the second delay knob 2d to a suitable angle according to actual needs to obtain a suitable second lead time, thereby improving the operational flexibility of the transfer switch 100.

[0084] In some embodiments, Figure 3 and Figure 4 As shown, an indicator light 2e is provided on the expansion backpack 2, and the indicator light 2e is used to indicate the connection status between the electrical device and the first power supply and the second power supply.

[0085] Exemplarily, the on or off of the indicator light 2e can indicate the connection status between the power-consuming device and the first power source and the second power source. For example, if the indicator light 2e is on, it means that there is a connection fault between the first power source connected to the first wiring port 1a and the power-consuming device, and if the indicator light 2e is off, it means that there is a connection fault between the second power source connected to the second wiring port 1b and the power-consuming device.

[0086] Exemplarily, the color of the indicator light 2e can indicate the connection status between the power-consuming device and the first power source and the second power source. For example, if the indicator light 2e is red, it means that there is a connection fault between the first power source connected to the first wiring port 1a and the power-consuming device, and if the indicator light 2e is green, it means that there is a connection fault between the second power source connected to the second wiring port 1b and the power-consuming device.

[0087] According to the different states of the indicator light 2e, it can be determined whether there is a fault in the connection between the first power source or the second power source and the electrical device, so that the operator can find and repair it in time to ensure the reliability of the transfer switch 100.

[0088] Through the connectivity status between the electrical device and the first power supply and the second power supply provided by this embodiment, indicated by the indicator light 2e, it is determined whether a fault occurs in the connection between the first power supply or the second power supply and the electrical device, so that the operator can promptly discover and perform repairs to ensure the reliability of the switching switch 100. On the other hand, the function of the indicator light 2e expands the function of the switching switch, thereby improving the operational flexibility of the switching switch 100.

[0089] In some embodiments, Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the expansion backpack 2 includes a backpack shell 21, a first positioning structure 22, a first circuit board 23, a second positioning structure 24 and a second circuit board 25; the backpack shell 21 is a shell structure with a accommodating cavity, including a connection panel 211 and a side panel assembly (not shown in the figure), the side panel assembly is connected between the connection panel 211 and the switch body 1 along the first direction X; the side panel assembly includes two oppositely arranged first side panels 212 and two oppositely arranged second side panels 213, and two slide bars 32 are respectively arranged at the bottom of the two first side panels 212, and the bottom is an end away from the connection panel 211; the first positioning structure 2 2 is fixed in the accommodating cavity and is used to position the first circuit board 23; the first circuit board 23 is detachably connected to the first positioning structure 22, the panel of the first circuit board 23 faces the connection panel 211, and the third wiring port 2a and the communication interface 2b are both provided on the connection panel 211; the second positioning structure 24 is fixed in the accommodating cavity and is used to position the second circuit board 25; the second circuit board 25 is detachably connected to the second positioning structure 24, the panel of the second circuit board 25 faces a first side panel 212, and the first delay knob 2c, the second delay knob 2d and the indicator light 2e are all provided on a first side panel 212.

[0090] The backpack shell 21 is a shell structure with a accommodating cavity, including a connection panel 211 and a side panel assembly, and the side panel assembly includes two first side panels 212 and two second side panels 213. Considering the backpack shell 21 as a container, the connection panel 211 is equivalent to the top surface of the container, the two first side panels 212 and the two second side panels 213 are equivalent to the side walls of the container, and the bottom surface of the container is an opening, and the first circuit board 23 and the second circuit board 25 can be assembled through the opening of the bottom surface. The space in the container provides an installation position for the first circuit board 23, the second circuit board 25, the first positioning structure 22 and the second positioning structure 24; the top surface and the side surface of the container are protective shells for the first circuit board 23, the second circuit board 25, the first positioning structure 22 and the second positioning structure 24.

[0091] Furthermore, since the bottom surface of the container is open and the top of the first side panel 212 is connected to the connection panel 211, the slide bar 32 on the backpack shell 21 is set at the bottom of the first side panel 212, so that the first side panel 212 is connected between the connection panel 211 and the switch body 1 along the first direction X. When the expansion backpack 2 is slidably connected to the switch body 1, the top surface of the switch body 1 serves as the bottom surface of the container, so that the conversion switch 100 composed of the expansion backpack 2 and the switch body 1 is an integral closed structure.

[0092] Circuit board (Printed Circuit Board, PCB for short), also known as circuit board, printed circuit board, is made of conductive material and is the material basis for supporting and connecting electronic components. Conductive circuits and other special-purpose graphics are printed on the panel of the circuit board, which plays the functions of fixing components, conducting current, transferring heat, preventing interference, mechanical support and wiring. Circuit boards are widely used in electronic products and electronic equipment, such as computers, mobile phones, televisions, cars, etc. In an embodiment of the present application, the first circuit board and the second circuit board serve as the control system of the expansion backpack, so that the expansion backpack has automatic control functions and other electrical functions.

[0093] Among them, a conversion module and a communication module are set on the panel of the first circuit board 23. The conversion module is connected to the second power supply through the third wiring port 2a, and controls the connection and disconnection of the line between the second power supply and the electrical equipment. Therefore, the position of the conversion module on the first circuit board 23 needs to correspond to the position of the third wiring port 2a; the communication module communication interface 2b is connected to the user, and is used to receive and transmit the connection status of the first power supply and the second power supply. Therefore, the position of the communication module on the first circuit board 23 needs to correspond to the communication interface 2b.

[0094] Therefore, when the panel of the first circuit board 23 is arranged toward the connection panel 211, the third connection port 2a and the communication interface 2b are both provided on the connection panel 211, so that the conversion module and the communication module correspond to the third connection port 2a and the communication interface 2b respectively.

[0095] The panel of the second circuit board 25 is provided with a first delay module, a second delay module and an indication module. The first delay module is used to receive the first electrical signal and control the duration of the first lead time, so the position of the first delay module on the second circuit board 25 needs to correspond to the first delay knob 2c; the second delay module is used to receive the second electrical signal and control the duration of the second lead time, so the position of the second delay module on the second circuit board 25 needs to correspond to the second delay knob 2d; the indication module is used to receive a third electrical signal, and the third electrical signal includes the status of the first power supply and the second power supply. The third electrical signal is used to control the on and off of the indicator light 2e or the color of the indicator light 2e, so the position of the indication module on the second circuit board 25 needs to correspond to the indicator light 2e.

[0096] Therefore, when the panel of the second circuit board 25 is set toward a first side panel 212, the first delay knob 2c, the second delay knob 2d and the indicator light 2e are all set on the first side panel 212, so that the first delay module, the second delay module and the indication module correspond to the first delay knob 2c, the second delay knob 2d and the indicator light 2e respectively.

[0097] The first positioning structure 22 is fixed in the accommodating cavity, and the first circuit board 23 is connected to the first positioning structure 22, so that the first circuit board 23 can be fixed in the corresponding installation position, thereby fixing the positions of the communication module and the communication module, so that the conversion module and the communication module can correspond to the third wiring port 2a and the communication interface 2b respectively. The first circuit board 23 and the first positioning structure 22 are detachably connected, so the first circuit board 23 can be disassembled at any time for replacement or maintenance to maintain the function of the communication module and the function of the communication module, thereby ensuring the reliability of the conversion switch 100.

[0098] The second positioning structure 24 is fixed in the accommodating cavity, and the second circuit board 25 is connected to the second positioning structure 24, so that the second circuit board 25 can be fixed in the corresponding installation position, thereby fixing the positions of the first delay module, the second delay module and the indication module, so that the first delay module, the second delay module and the indication module can correspond to the first delay knob 2c, the second delay knob 2d and the indicator light 2e respectively. And the second circuit board 25 and the second positioning structure 24 are detachably connected, so the second circuit board 25 can be disassembled at any time for replacement or maintenance to maintain the functions of the first delay module, the second delay module and the indication module, thereby ensuring the reliability of the transfer switch 100.

[0099] According to the embodiment, the expansion backpack 2 includes a backpack shell 21, a first positioning structure 22, a first circuit board 23, a second positioning structure 24 and a second circuit board 25; the backpack shell 21 is a shell structure with a housing cavity, including a connection panel 211 and a side panel assembly, and the space in the housing cavity provides an installation position for the first circuit board 23, the second circuit board 25, the first positioning structure 22 and the second positioning structure 24; the connection panel 211, two first side panels 212 and two second side panels 213 of the housing cavity are protective shells for the first circuit board 23, the second circuit board 25, the first positioning structure 22 and the second positioning structure 24. The first side panel 212 in the side panel assembly is connected between the connection panel 211 and the switch body 1 along the first direction X, and the two slide bars 32 are respectively arranged at the bottom of the two first side panels 212. When the expansion backpack 2 is slidably connected to the switch body 1, the top surface of the switch body 1 serves as the bottom surface of the container, so that the conversion switch 100 composed of the expansion backpack 2 and the switch body 1 is an integral closed structure. The first positioning structure 22 is fixed in the accommodating cavity, and the first circuit board 23 is connected to the first positioning structure 22, so that the panel of the first circuit board 23 is set toward the connecting panel 211, so that the panel of the first circuit board 23 can be connected to the third wiring port 2a and the communication interface 2b accordingly, and the first circuit board 23 and the first positioning structure 22 are detachably connected, so the first circuit board 23 can be disassembled at any time for replacement or maintenance to maintain the control function of the first circuit board 23, thereby ensuring the reliability of the conversion switch 100. The second positioning structure 24 is fixed in the accommodating cavity, and the second circuit board 25 is connected to the second positioning structure 24, so that the panel of the second circuit board 25 can be set toward a first side panel 212, so that the panel of the second circuit board 25 can be correspondingly connected to the first delay knob 2c, the second delay knob 2d and the indicator light 2e, and the second circuit board 25 and the second positioning structure 24 are detachably connected, so the second circuit board 25 can be disassembled at any time for replacement or maintenance to maintain the control function of the second circuit board 25, thereby ensuring the reliability of the conversion switch 100.

[0100] In some embodiments, Figure 6 and Figure 7As shown, the first positioning structure 22 includes: a first support shaft 221, a second support shaft 222, a third support shaft 223, a fourth support shaft 224, a first bolt 225 and a second bolt 226; the bottom of the first support shaft 221 is fixed to the connection panel 211, and a first positioning pin 2211 is arranged on the top of the first support shaft 221, and the first support shaft 221 is located on the first diagonal line of the panel of the first circuit board 23; the bottom of the second support shaft 222 is fixed to the connection panel 211, and a second positioning pin 2221 is arranged on the top of the second support shaft 222, and the second support shaft 222 is located on the first diagonal line (not shown in the figure) of the panel of the first circuit board 23; a first connecting hole 231 and a second connecting hole 232 are arranged on the first diagonal line, and the first positioning pin 2211 is sleeved in the first connecting hole 231, and the second positioning pin 2221 is arranged on the top of the second support shaft 222, and the second support shaft 222 is located on the first diagonal line (not shown in the figure) of the panel of the first circuit board 23. The pin 2221 is sleeved in the second connecting hole 232; the bottom of the third support shaft 223 is fixed on the connecting panel 211, and the top of the third support shaft 223 is provided with a first threaded hole 2231, and the third support shaft 223 is located on the second diagonal line of the panel of the first circuit board 23; the bottom of the fourth support shaft 224 is fixed on the connecting panel 211, and the top of the fourth support shaft 224 is provided with a second threaded hole 2241, and the fourth support shaft 224 is located on the second diagonal line of the panel of the first circuit board 23 (not shown in the figure); the third connecting hole 233 and the fourth connecting hole 234 are provided on the second diagonal line, the first bolt 225 is sleeved in the third connecting hole 233 and screwed in the first threaded hole 2231, and the second bolt 226 is sleeved in the fourth connecting hole 234 and screwed in the second threaded hole 2241.

[0101] From the above content, it can be seen that the first circuit board 23 enters the accommodating cavity from the opening on the bottom surface of the accommodating cavity and completes the assembly. The panel of the first circuit board 23 faces the connecting panel 211, and the connecting panel 211 and the bottom surface are two surfaces arranged opposite to each other. Therefore, the first positioning structure 22 needs to be arranged between the connecting panel 211 and the panel of the first circuit board 23.

[0102] From a planar perspective, the panel of the first circuit board 23 is a rectangle. According to the shape characteristics of the rectangle, a positioning point is set at each of the four corners of the rectangle, which is set between the connection panel 211 and the panel of the first circuit board 23, so that the first circuit board 23 can be fixed on the plane, wherein two positioning points are set on one diagonal line of the rectangle, and two positioning points are set on the other diagonal line of the rectangular thin plate.

[0103] Exemplarily, the first support shaft 221 and the second support shaft 222 provided between the connection panel 211 and the panel of the first circuit board 23 are both located on the first diagonal line of the panel of the first circuit board 23. According to the above content, the first support shaft 221 and the second support shaft 222 can be regarded as two positioning points provided on a diagonal line of a rectangle; the third support shaft 223 and the fourth support shaft 224 between the connection panel 211 and the panel of the first circuit board 23 are both located on the second diagonal line of the panel of the first circuit board 23. According to the above content, the third support shaft 223 and the fourth support shaft 224 can be regarded as two positioning points provided on another diagonal line of the rectangle. Therefore, the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224 are four positioning points, which need to pass through the first circuit board 23 at the same time to achieve the fixation of the first circuit board 23 on the plane.

[0104] Furthermore, the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224 also play a supporting role for the first circuit board 23, so the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224 are all rod-shaped structures with larger diameters to make the installation of the first circuit board 23 more stable.

[0105] In order to simultaneously realize the positioning function for the first circuit board 23, the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224 need to pass through the first circuit board 23. In order to reduce the opening area of ​​the first circuit board 23 and ensure the control function of the first circuit board 23, positioning pins with smaller diameters can be set on the tops of the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224, so that the positioning pins pass through the first circuit board 23, thereby reducing the opening area of ​​the first circuit board 23 and realizing the positioning function of the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224 for the first circuit board 23.

[0106] From a spatial perspective, in order to prevent the first circuit board 23 from moving along the height of the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224, it is also necessary to limit the height of the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224. Considering that the first circuit board 23 needs to be detachably connected to the first positioning structure 22, the limiting pins on the third support shaft 223 and the fourth support shaft 224 are changed to the first bolt 225 and the second bolt 226, and the limiting pins on the third support shaft 223 and the fourth support shaft 224 are changed to the first bolt 225 and the second bolt 226, and the limiting pins on the third support shaft 223 and the fourth support shaft 224 are changed to the first bolt 225 and the second bolt 226. A first threaded hole 2231 and a second threaded hole 2241 are formed at the top of the third support shaft 223 and the fourth support shaft 224; the first bolt 225 and the second bolt 226 are screwed into the first threaded hole 2231 and the second threaded hole 2241 from the top of the first circuit board 23, so that one side of the first circuit board 23 abuts against the top of the third support shaft 223 and the fourth support shaft 224, and the other side abuts against the bottom of the bolt head, thereby limiting the movement of the first circuit board 23 along the height of the first support shaft 221, the second support shaft 222, the third support shaft 223 and the fourth support shaft 224.

[0107] In summary, a first locating pin 2211 and a second locating pin 2221 are arranged at the top of the first support shaft 221 and the second support shaft 222, and the first locating pin 2211 and the second locating pin 2221 penetrate the first circuit board 23; a first threaded hole 2231 and a second threaded hole 2241 are arranged at the top of the third support shaft 223 and the fourth support shaft 224, and the first bolt 225 and the second bolt 226 are screwed into the first threaded hole 2231 and the second threaded hole 2241 from the top of the first circuit board 23, so that one side of the first circuit board 23 abuts against the top of the third support shaft 223 and the fourth support shaft 224, and the other side abuts against the bottom of the bolt head; it is used to completely fix the first circuit board 23 in the accommodating cavity, so that the first circuit board 23 can be connected to the third wiring port 2a and the communication interface 2b accordingly, thereby ensuring the reliability of the conversion switch 100.

[0108] The first positioning structure 22 provided by this embodiment includes: a first support shaft 221, a second support shaft 222, a third support shaft 223, a fourth support shaft 224, a first bolt 225 and a second bolt 226; the first support shaft 221 and the second support shaft are both located on the first diagonal line of the panel of the first circuit board 23, the bottoms of the first support shaft 221 and the second support shaft 222 are fixed on the connection panel 211, and the first positioning pins 2211 and the second positioning pins 2221 provided on the tops of the first support shaft 221 and the second support shaft 222 respectively penetrate the first connection holes provided on the first diagonal line. 231 and the second connecting hole 232; the third support shaft 223 and the fourth support shaft 224 are both located on the second diagonal line of the panel of the first circuit board 23, the bottoms of the third support shaft 223 and the fourth support shaft 224 are fixed on the connecting panel 211, the tops of the third support shaft 223 and the fourth support shaft 224 are provided with a first threaded hole 2231 and a second threaded hole 2241, and the first bolt 225 and the second bolt 226 are respectively sleeved on the third connecting hole 233 and the fourth connecting hole 234 provided on the second diagonal line, and then respectively screwed into the first threaded hole 2231 and the second threaded hole 2241. The first positioning pin 2211, the second positioning pin 2221, the first bolt 225 and the second bolt 226 are respectively inserted into the first connecting hole 231, the second connecting hole 232, the third connecting hole 233 and the fourth connecting hole 234, thereby limiting the movement of the first circuit board 23 within the plane where the panel of the first circuit board 23 is located; the first bolt 225 and the second bolt 226 are respectively screwed into the first threaded hole 2231 and the second threaded hole 2241, thereby limiting the movement of the first circuit board 23 along the height of the first support axis 221, the second support axis 222, the third support axis 223 and the fourth support axis 224, thereby completely fixing the first circuit board 23 in the accommodating cavity, enabling the first circuit board 23 to be connected to the third wiring port 2a and the communication interface 2b accordingly, thereby ensuring the reliability of the conversion switch 100.

[0109] In some embodiments, Figure 4 , Figure 6 and Figure 7As shown, the second positioning structure 24 includes: a first limiting component 241, a second limiting component 242, a third bolt 243 and a first nut 244; the first limiting component 241 is fixed to one side of the connection panel 211 along the second direction Y, and the second direction Y is the direction in which the two second side panels 213 are relatively arranged; the second limiting component 242 is fixed to the other side of the connection panel 211 along the second direction Y; one end of the second circuit board 25 is inserted into the limiting groove of the first limiting component 241, and the other end of the second circuit board 25 is inserted into the limiting groove of the second limiting component 242; a fifth connecting hole 2122 is provided on the first side panel 212, and a sixth connecting hole 251 is provided on the second circuit board 25; the third bolt 243 is sleeved in the fifth connecting hole 2122 and the sixth connecting hole 251, and the first nut 244 is screwed on the third bolt 243 from the bottom of the third bolt 243 to lock the third bolt 243.

[0110] As can be seen from the above, the second circuit board 25 enters the accommodating cavity from the opening on the bottom surface of the accommodating cavity and completes the assembly, the panel of the second circuit board 25 faces a first side plate 212, and the first side plate 212 and the bottom surface are two surfaces perpendicular to each other. Obviously, the way the second circuit board 25 enters the accommodating cavity is similar to the way a card is inserted into a card slot, so the second positioning structure 24 can be a limit groove structure similar to the card slot.

[0111] The panel of the second circuit board 25 is rectangular, including two long sides and two short sides. In order to ensure the stability of the second circuit board 25, a limiter assembly should be provided at each end of the two long sides. Figure 1 , Figure 2 and Figure 4 As shown, the direction of the long side is the direction in which the two second side plates 213 are relatively arranged. In the following content, the second direction Y refers to the direction of the long side.

[0112] Therefore, limiting grooves are provided in the first limiting component 241 and the second limiting component 242 along the second direction Y, one end of the second circuit board 25 in the second direction Y is inserted into the limiting groove of the first limiting component 241, and the other end of the second circuit board 25 in the second direction Y is inserted into the limiting groove of the second limiting component 242, thereby limiting the movement of the second limiting component 242 between the two first side panels 212.

[0113] Exemplarily, the first limiting assembly 241 and the second limiting assembly 242 are two limiting plates plugged into the connection panel 211, and the limiting grooves of the first limiting assembly 241 and the second assembly are the gaps between the two limiting plates. Since the two limiting plates are parallel to the first side plate 212, the exit directions of the two limiting grooves are perpendicular to the first side plate 212.

[0114] Therefore, in order to prevent the second circuit board 25 from coming out of the opening of the limiting groove, a fifth connecting hole 2122 is provided on a first side plate 212, and a sixth connecting hole 251 is opened on the second circuit board 25; the third bolt 243 is sleeved in the fifth connecting hole 2122 and the sixth connecting hole 251, so that the bolt head of the third bolt 243 abuts against the first side plate 212, and the first nut 244 is screwed on the third bolt 243 from the bottom of the third bolt 243 until the first nut 244 locks the third bolt 243, so that the third bolt 243 is fixedly penetrated on the second circuit board 25, and when the second circuit board 25 moves toward the opening direction of the limiting groove, the third bolt 243 and the sixth connecting hole 251 opened on the second connecting plate abut against each other, thereby preventing the second circuit board 25 from coming out of the opening of the limiting groove.

[0115] In summary, the first limit assembly 241 and the second limit assembly 242 are arranged along the second direction Y, and the first limit assembly 241 and the second limit assembly 242 are both provided with limit grooves; the fifth connecting hole 2122 is provided on the first side plate 212, and the sixth connecting hole 251 is provided on the second circuit board 25, and the third bolt 243 is sleeved in the fifth connecting hole 2122 and the sixth connecting hole 251, so that the bolt head of the third bolt 243 abuts against the first side plate 212, and the first nut 244 is screwed on the third bolt 243 from the bottom of the third bolt 243 until the first nut 244 locks the third bolt 243; it is used to completely fix the second circuit board 25 in the accommodating cavity, so that the second circuit board 25 can be correspondingly connected with the first delay knob 2c, the second delay knob 2d and the indicator light 2e, thereby ensuring the reliability of the conversion switch 100.

[0116] The second positioning structure 24 provided by this embodiment includes a first limiting component 241, a second limiting component 242, a third bolt 243 and a first nut 244; the first limiting component 241 and the second limiting component 242 are respectively fixed to the two sides of the connection panel 211 along the second direction Y, and the second direction Y is the direction in which the two second side panels 213 are relatively arranged; the two ends of the second circuit board 25 are respectively inserted into the limiting grooves of the first limiting component 241 and the second limiting component 242, so as to limit the movement of the second limiting component 242 between the two first side panels 212; the first side panel 212 is provided with a fifth connecting hole 2122, and the second circuit board 25 is opened A sixth connecting hole 251 is provided; the third bolt 243 is sleeved in the fifth connecting hole 2122 and the sixth connecting hole 251, and the first nut 244 is screwed on the third bolt 243 from the bottom thereof, so that when the second circuit board 25 moves toward the opening direction of the limiting groove, the third bolt 243 and the sixth connecting hole 251 provided on the second connecting plate abut against each other to prevent the second circuit board 25 from escaping from the opening of the limiting groove; thereby, the second circuit board 25 is completely fixed in the accommodating cavity, so that the second circuit board 25 can be connected to the first delay knob 2c, the second delay knob 2d and the indicator light 2e correspondingly, thereby ensuring the reliability of the conversion switch 100.

[0117] In some embodiments, Figure 4 , Figure 6 and Figure 7 As shown, the switching switch 100 also includes a test button 2f, one end of which is connected to the panel of the second circuit board 25, for testing whether the first power supply and the second power supply can be smoothly switched; the other end of the test button 2f passes through a first side panel 212 and extends to the outside of the accommodating cavity.

[0118] In daily use, the first power supply of the conversion switch 100 seldom fails and loses power, and the frequency of conversion between the first power supply and the second power supply in the conversion switch 100 is very low.

[0119] In order to avoid the situation where the frequency of conversion between the first power supply and the second power supply is very low, and the conversion structure failure between the first power supply and the second power supply cannot be discovered and resolved, thereby affecting the smooth conversion between the first power supply and the second power supply in the conversion switch 100, it is necessary to regularly test the conversion structure between the first power supply and the second power supply, that is, it is necessary to regularly manually convert the first power supply and the second power supply to ensure the smooth conversion between the first power supply and the second power supply in the conversion switch 100.

[0120] According to the embodiment, one end of the test button 2f is connected to the panel of the second circuit board 25, and is used to test whether the first power supply and the second power supply can be smoothly switched; the other end of the test button 2f passes through the first side panel 212 and extends to the outside of the accommodating cavity, so that the operator can perform manual operation outside the accommodating cavity to control the switching between the first power supply and the second power supply, thereby testing the switching structure between the first power supply and the second power supply to ensure that the first power supply and the second power supply in the switching switch 100 can be smoothly switched, thereby improving the reliability of the switching switch 100. On the other hand, the test function of the test button expands the function of the switching switch, thereby improving the operational flexibility of the switching switch 100.

[0121] In some embodiments, Figure 4 , Figure 6 and Figure 7 As shown, the test button 2f is located at one end of the second circuit board 25; the width of the limiting groove of the first limiting component 241 is greater than the width of the limiting groove of the second limiting component 242.

[0122] From the above content, it can be seen that the second circuit board 25 enters the accommodating cavity from the opening at the bottom of the accommodating cavity, and is inserted into the limiting grooves of the first limiting component 241 and the second limiting component 242. Since the second circuit board 25 is provided with a test button 2f that passes through the first side panel 212, one end of the second circuit board 25 where the test button 2f is located requires a larger assembly space so that the test button 2f can smoothly pass through the limiting groove and extend out of the accommodating cavity during the assembly process.

[0123] According to this embodiment, since the test button 2f is located at one end of the second circuit board 25, and one end of the second circuit board 25 is inserted into the limiting groove of the first limiting component 241, the width of the limiting groove of the first component is greater than the width of the limiting groove of the second limiting component 242, so that the limiting groove of the first limiting component 241 has a larger assembly space, so that the test button 2f can smoothly pass through the limiting groove and extend out of the accommodating cavity during the assembly process, and it is also convenient for the second circuit board 25 provided with the test button 2f to be disassembled and repaired.

[0124] In some embodiments, Figure 7 As shown, the first limiting assembly 241 further includes a limiting grid 245 ; one end of the limiting grid 245 is fixed to the connection panel 211 , and the other end of the limiting grid 245 is provided with a snap-fitting groove 2451 , which is used to snap-fit ​​the first nut 244 .

[0125] The first nut 244 is screwed onto the third bolt 243 to limit the displacement of the second circuit board 25 in the direction of the opening of the limiting groove; since the threaded connection between the first nut 244 and the third bolt 243 is detachable, the connection between the first nut 244 and the third bolt 243 becomes loose due to external force, thereby causing the second circuit board 25 to be displaced in the direction of the opening of the limiting groove, which is not conducive to the corresponding connection of the second circuit board 25 with the first delay knob 2c, the second delay knob 2d and the indicator light 2e, thereby reducing the reliability of the conversion switch 100.

[0126] Therefore, it is necessary to limit the rotation of the first nut 244 when the first nut 244 and the third bolt 243 are in a locked state, so as to prevent the connection between the first nut 244 and the third bolt 243 from being loosened due to external force.

[0127] According to the embodiment, the first limiting assembly 241 also includes a limiting grid 245, one end of which is fixed on the connection panel 211, and the other end of which is provided with a clamping groove 2451; when the first nut 244 is screwed on the third bolt 243, and the first nut 244 and the third bolt 243 are in a locked state, any one of the hexagonal edges of the first nut 244 is clamped in the clamping groove 2451, so that the first nut 244 cannot be further screwed or screwed in the opposite direction, thereby preventing the connection between the first nut 244 and the third bolt 243 from being loosened due to external force, so that the second circuit board 25 is completely fixed in the accommodating cavity, so that the second circuit board 25 can be connected to the first delay knob 2c, the second delay knob 2d and the indicator light 2e accordingly, thereby ensuring the reliability of the conversion switch 100.

[0128] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0129] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A transfer switch, characterized in that: include: The switch body and the expansion backpack are detachably connected to the switch body: The switch body is provided with a first wiring port, a second wiring port and a switching paddle; The first connection port is connected between the power-consuming device and the first power source, and is used to enable the first power source to provide power to the power-consuming device; The second wiring port is connected between the power-consuming device and the second power supply, and is used for the second power supply to provide power to the power-consuming device; The switch paddle is connected to the first power supply and the second power supply, and is used to control the on / off between the first power supply and the power-consuming device, and the on / off between the second power supply and the power-consuming device; The expansion backpack is provided with a third wiring port, and the third wiring port is electrically connected to the second power supply, so that the expansion backpack automatically controls the on and off of the second power supply according to the state of the first power supply.

2. The transfer switch according to claim 1, characterized in that: The expansion backpack is detachably connected to the switch body via a connecting assembly; The connecting component includes a slide groove and a slide bar, the slide groove is arranged on the switch body, and the slide bar is arranged on the expansion backpack; The slide bar is slidably connected in the slide groove, so that the expansion backpack can be detachably connected to the switch body; The slide bar is provided with a limiting structure, and the limiting structure is clamped in the slide groove along a first direction to limit the slide bar from escaping from the slide groove along the first direction, and the first direction is perpendicular to the sliding direction of the slide bar.

3. The transfer switch according to claim 2, characterized in that: The expansion backpack is provided with a communication interface, a first delay knob and a second delay knob; The communication interface is used to transmit data in the conversion switch; The first delay knob is used to control a first lead time, which is the preparation time for switching from the first power supply providing electric energy to the electric device to the second power supply providing electric energy to the electric device; The rotation angle of the first delay knob corresponds to the duration of the first lead time; The second delay knob is used to control a second lead time, wherein the first lead time is the preparation time for switching from the second power supply providing electric energy to the electric device to the first power supply providing electric energy to the electric device; The rotation angle of the second delay knob corresponds to the duration of the second lead time.

4. The transfer switch according to claim 3, characterized in that: The expansion backpack is provided with an indicator light, which is used to indicate the connection status between the electrical device and the first power supply and the second power supply.

5. The transfer switch according to claim 4, characterized in that: The expansion backpack includes: a backpack shell, a first positioning structure, a first circuit board, a second positioning structure and a second circuit board; The backpack housing is a housing structure having a receiving cavity, comprising a connecting panel and a side panel assembly, wherein the side panel assembly is connected between the connecting panel and the switch body along the first direction; The side panel assembly includes two first side panels and two second side panels, the two slide bars are respectively arranged at the bottom of the two first side panels, and the bottom is an end away from the connection panel; The first positioning structure is fixed in the accommodating cavity and is used to position the first circuit board; The first circuit board is detachably connected to the first positioning structure, the panel of the first circuit board faces the connection panel, and the third wiring port and the communication interface are both provided on the connection panel; The second positioning structure is fixed in the accommodating cavity and is used to position the second circuit board; The second circuit board is detachably connected to the second positioning structure, the panel of the second circuit board faces one of the first side panels, and the first delay knob, the second delay knob and the indicator light are all arranged on the one of the first side panels.

6. The transfer switch according to claim 5, characterized in that: The first positioning structure includes: a first support shaft, a second support shaft, a third support shaft, a fourth support shaft, a first bolt and a second bolt; The bottom of the first support shaft is fixed on the connection panel, the top of the first support shaft is provided with a first positioning pin, and the first support shaft is located on a first diagonal line of the panel of the first circuit board; The bottom of the second support shaft is fixed on the connection panel, the top of the second support shaft is provided with a second positioning pin, and the second support shaft is located on the first diagonal line of the panel of the first circuit board; A first connecting hole and a second connecting hole are provided on the first diagonal line, the first positioning pin is sleeved in the first connecting hole, and the second positioning pin is sleeved in the second connecting hole; The bottom of the third support shaft is fixed on the connection panel, the top of the third support shaft is provided with a first threaded hole, and the third support shaft is located on the second diagonal line of the panel of the first circuit board; The bottom of the fourth support shaft is fixed on the connection panel, the top of the fourth support shaft is provided with a second threaded hole, and the fourth support shaft is located on the second diagonal line of the panel of the first circuit board; A third connecting hole and a fourth connecting hole are arranged on the second diagonal line, the first bolt is sleeved in the third connecting hole and screwed in the first threaded hole, and the second bolt is sleeved in the fourth connecting hole and screwed in the second threaded hole.

7. The transfer switch according to claim 6, characterized in that: The second positioning structure comprises: a first limiting assembly, a second limiting assembly, a third bolt and a first nut; The first limiting assembly is fixed to one side of the connecting panel along a second direction, and the second direction is a direction in which the two second side panels are arranged opposite to each other; The second limiting assembly is fixed to the other side of the connecting panel along the second direction; One end of the second circuit board is inserted into the limiting groove of the first limiting component, and the other end of the second circuit board is inserted into the limiting groove of the second limiting component; The first side plate is provided with a fifth connection hole, and the second circuit board is provided with a sixth connection hole; The third bolt is sleeved in the fifth connecting hole and the sixth connecting hole, and the first nut is screwed on the third bolt from the bottom of the third bolt to lock the third bolt.

8. The transfer switch according to claim 7, characterized in that: Also includes a test button; One end of the test button is connected to the panel of the second circuit board, and is used to test whether the first power source and the second power source can be smoothly switched; The other end of the test button passes through the first side plate and extends to the outside of the accommodating cavity.

9. The transfer switch according to claim 8, characterized in that: The test button is located at one end of the second circuit board; The width of the limiting groove of the first limiting assembly is greater than the width of the limiting groove of the second limiting assembly.

10. The transfer switch according to claim 9, characterized in that: The first limiting component also includes a limiting grid; One end of the limiting grid is fixed on the connecting panel, and the other end of the limiting grid is provided with a clamping groove, and the clamping groove is used for clamping the first nut.

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