Rotary switch, electrical device and power system

Abstract

The present disclosure provides a rotary switch, an electrical device and a power system, and relates to the technical field of electricity. The rotary switch comprises a switch body, the switch body is located in an inner cavity of a cabinet of an electrical device, a pin of the switch body is connected with a circuit board in the inner cavity; a control rod is arranged in a through hole of a wall plate of the cabinet and connected with the switch body; a rotary handle is located outside the cabinet and connected with the control rod. The rotary switch of the present disclosure has less components, simple structure, and does not need to be additionally equipped with a cable, which can reduce the complexity of the arrangement of the rotary switch, reduce the arrangement cost and improve the installation efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of electrical technology, and more specifically, to a rotary switch, electrical equipment, and power system. Background Technology

[0002] In electrical equipment such as inverters, rotary switches are typically used to switch the circuit's on / off state. These switches are usually located on the chassis panel of the equipment, and their pins are connected to the circuit to be connected, such as a circuit board, via wires. In this case, the rotary switch requires additional cabling, resulting in a more complex layout, higher cost, and lower installation efficiency. Utility Model Content

[0003] This disclosure aims to address, to some extent, the problem of simplifying the layout of rotary switches and improving their installation efficiency in related technologies.

[0004] To at least partially address at least one aspect of the aforementioned problems, in a first aspect, this disclosure provides a rotary switch, the rotary switch comprising:

[0005] A switch body, wherein the switch body is located inside the housing of the electrical equipment, and the pins of the switch body are connected to a circuit board inside the housing;

[0006] A joystick, which passes through a hole in the wall panel of the chassis and is connected to the switch body;

[0007] A rotary handle is located outside the chassis and is connected to the joystick.

[0008] Optionally, the switch body is provided with a connection hole, and the operating lever is inserted into the connection hole.

[0009] Optionally, the joystick is detachably mounted to the connection hole, and the cross-sectional area of ​​the through hole is greater than or equal to the cross-sectional area of ​​the joystick.

[0010] Optionally, the pin is bent and attached to the circuit board, and the pin has a through hole through which a fastener passes and is connected to the circuit board.

[0011] Optionally, the pins are inserted into the circuit board.

[0012] Optionally, the rotary switch further includes a sealing structure disposed at the through hole.

[0013] Optionally, the rotary switch further includes a limiting nut, the sealing structure is a first sealing ring, the switch body is integrally formed with a cylinder coaxial with the operating lever, the cylinder passes through the through hole, the first sealing ring is sleeved on the part of the cylinder located inside the chassis, the limiting nut is sleeved on the part of the cylinder located outside the chassis, and the limiting nut is threadedly connected to the cylinder, and the operating lever passes through the cylinder;

[0014] Alternatively, the sealing structure is a second sealing ring, which is housed in the through hole and sleeved on the operating lever. The radial outer end of the second sealing ring abuts against the circumferential edge of the through hole, and the radial inner end abuts against the operating lever.

[0015] Optionally, the rotary handle is provided with a slot, and the portion of the control lever located outside the chassis is inserted into the slot; the rotary handle is provided with a protective ring, and when the rotary handle is connected to the control lever, the protective ring is fitted around the outer periphery of the limiting nut or the second sealing ring.

[0016] Optionally, the circuit board includes one or more of a boost circuit, an inverter circuit, a string detection circuit, and a switching circuit.

[0017] Optionally, the circuit board is parallel to the bottom plate of the chassis and divides the inner cavity of the chassis into multiple chambers.

[0018] In a second aspect, this disclosure provides an electrical device, including a chassis, a circuit board, and a rotary switch as described in the first aspect above. The circuit board is disposed in the inner cavity of the chassis, and the switch body of the rotary switch is located in the inner cavity of the chassis, with the pins of the switch body connected to the circuit board. The operating lever of the rotary switch passes through a through hole in the wall panel of the chassis and is connected to the switch body. The rotary handle of the rotary switch is located outside the chassis and is connected to the operating lever.

[0019] Thirdly, this disclosure provides an electric power system that includes the electrical equipment described in the second aspect above.

[0020] In the rotary switch, electrical equipment, and power system disclosed herein, the pins of the switch body are connected to the circuit board inside the housing, and the operating lever of the rotary switch is inserted through a through hole in the wall panel of the housing. The part of the operating lever inside the housing is connected to the switch body, and the part of the operating lever outside the housing is connected to the rotary handle. Thus, by rotating the rotary handle, the operating lever can be manipulated to switch the on / off state of the pins of the switch body, thereby realizing the switching of the on / off state of the circuit on the circuit board. The rotary switch disclosed herein has fewer components, a simpler structure, and does not require additional cables, which can reduce the complexity of the rotary switch layout, reduce layout costs, and improve installation efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the rotary switch applied to electrical equipment according to the first embodiment of this disclosure;

[0022] Figure 2 This is an exploded structural diagram of an installation process of a rotary switch according to the first embodiment of the present disclosure;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure shown, after the switch body is connected to the circuit board.

[0024] Figure 4 This is a three-dimensional structural diagram of the switch body of the rotary switch in the first embodiment of this disclosure;

[0025] Figure 5 This is a schematic diagram of another installation process of the rotary switch in the first embodiment of this disclosure;

[0026] Figure 6 This is a three-dimensional structural diagram of the switch body in the second embodiment of this disclosure;

[0027] Figure 7 This is a schematic diagram of the structure after the switch body and the circuit board are connected in the second embodiment of this disclosure;

[0028] Figure 8 for Figure 7 Another structural diagram of the structure shown;

[0029] Figure 9 This is a structural schematic diagram of an installation process of the rotary switch according to the second embodiment of this disclosure;

[0030] Figure 10 This is a schematic diagram of the rotary switch applied to electrical equipment according to the second embodiment of this disclosure;

[0031] Figure 11 This is a schematic diagram of the rotary switch applied to electrical equipment according to the third embodiment of this disclosure;

[0032] Figure 12 for Figure 11 An exploded view of the structure shown.

[0033] Figure 13 This is a cross-sectional view of the rotary switch applied to an electrical device according to the third embodiment of this disclosure;

[0034] Figure 14 This is a schematic diagram of the rotary switch in the third embodiment of this disclosure;

[0035] Figure 15 This is a schematic diagram of the structure of the rotary switch with a protective ring in the fourth embodiment of this disclosure;

[0036] Figure 16 This is a schematic diagram of the structure when the sealing structure is a second sealing ring in the fifth embodiment of this disclosure.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Switch body; 11-Pin; 12-Connecting hole; 13-Through hole; 14-Cylinder; 2-Operating lever; 3-Rotating handle; 31-Slot; 32-Protective ring; 4-Chassis; 41-Inner cavity; 42-Wall panel; 43-Through hole; 44-Base plate; 45-Connecting block; 5-Circuit board; 51-Conductive part; 52-Socket; 6-Fastener; 7-First sealing ring; 8-Limit nut; 9-Second sealing ring. Detailed Implementation

[0039] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Although some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0040] Those skilled in the art should understand that, unless explicitly stated in the context, or if the context reveals that it has a clear limitation, the following should be understood: the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments"; the concepts of "first," "second," etc., are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. A feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0041] Furthermore, the illustrative expressions of the terms used in this specification do not necessarily refer to the same embodiments or implementations. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0042] In electrical equipment such as inverters, rotary switches are typically used to switch the on / off state of a circuit. For example, a rotary switch is usually located on the wall panel 42 of the equipment's chassis 4, and its pin 11 is connected to the circuit to be connected, such as circuit board 5, via wires. In this case, the rotary switch requires additional cabling, resulting in a more complex layout, higher cost, and lower installation efficiency. Furthermore, these additional wires occupy extra internal space in the chassis 4, leading to a larger space requirement for the rotary switch.

[0043] like Figure 1-4 As shown, please refer to the following for details. Figure 3 This embodiment provides a rotary switch, which includes:

[0044] The switch body 1 is located in the inner cavity 41 of the chassis 4 of the electrical equipment, and the pins 11 of the switch body 1 are connected to the circuit board 5 in the inner cavity 41.

[0045] The control lever 2 passes through the through hole 43 of the wall panel 42 of the housing 4 and is connected to the switch body 1;

[0046] Rotary handle 3 is located outside the housing 4 and is connected to the control lever 2.

[0047] For example, in a rotary switch, the number of switch bodies 1 is multiple, such as... Figure 3As shown, it illustrates a configuration where six switch bodies 1 are arranged sequentially and operated by the same lever 2. Each switch body 1 has two pins 11, and the circuit board 5 has a conductive part 51 corresponding to each pin 11, with each pin 11 electrically connected to the corresponding conductive part 51.

[0048] When the control lever 2 is operated (by applying force to the rotary handle 3 to rotate the control lever 2) and the two pins 11 of a certain switch body 1 are made to form a conductive circuit, the two conductive parts 51 corresponding to the two pins 11 are made to conduct, thereby making the circuit where the two conductive parts 51 are located conduct. When the control lever 2 is operated (by applying force to the rotary handle 3 to rotate the control lever 2) and the two pins 11 of a certain switch body 1 are in a non-conductive circuit, the two conductive parts 51 corresponding to the two pins 11 are not made to conduct, thereby making the circuit where the two conductive parts 51 are located non-conductive.

[0049] The way the rotary handle 3 is connected to the joystick 2 is not a limitation. The rotary handle 3 and the joystick 2 are usually detachably connected. For example, the rotary handle 3 is a knob, and the knob and the part of the joystick 2 exposed outside the chassis 4 are plugged in.

[0050] Thus, in the rotary switch of this disclosure, the pins 11 of the switch body 1 are connected to the circuit board 5 in the inner cavity 41 of the housing 4, and the operating lever 2 of the rotary switch is inserted through the through hole 43 of the wall panel 42 of the housing 4. The part of the operating lever 2 inside the housing 4 is connected to the switch body 1, and the part of the operating lever 2 outside the housing 4 is connected to the rotary handle 3. By rotating the rotary handle 3, the operating lever 2 can be operated to switch the on / off state of the pins 11 of the switch body 1, thereby realizing the switching of the on / off state of the circuit on the circuit board 5. The rotary switch of this disclosure has fewer components, a simpler structure, and does not require additional cables, which can reduce the complexity of the rotary switch layout, reduce layout costs, and improve installation efficiency.

[0051] Optionally, the switch body 1 is provided with a connection hole 12, and the operating lever 2 is inserted into the connection hole 12.

[0052] Specifically, in any switch body 1, each pin 11 has an internal conductive point located on the side wall of the connection hole 12. The operating lever 2 is inserted into the connection hole 12. When force is applied to the rotating handle 3, causing the operating lever 2 to be manipulated to contact the two internal conductive points respectively, the two pins 11 are connected. When force is applied to the rotating handle 3, causing the operating lever 2 to be manipulated to be separated from at least one of the two internal conductive points, the two pins 11 are disconnected.

[0053] Optionally, the joystick 2 is detachably mounted in the connection hole 12, and the cross-sectional area of ​​the through hole 43 is greater than or equal to the cross-sectional area of ​​the joystick 2.

[0054] In other words, the joystick 2 is inserted into the connection hole 12 and can be disengaged from the connection hole 12, thus the joystick 2 is detachably installed in the connection hole 12. The cross-sectional area of ​​the through hole 43 is larger than the cross-sectional area of ​​the joystick 2, meaning that when the joystick 2 is disassembled from the connection hole 12, the joystick 2 can be pulled out from the outside of the housing 4.

[0055] Specifically, such as Figure 2 , 3 As shown, in some scenarios, the switch body 1 can be connected to the circuit board 5 installed inside the chassis 4 first, and then the control lever 2 can be inserted into the through hole 43 and the connection hole 12 outside the chassis 4, so that the control lever 2 contacts the internal conductive point on the side wall of the connection hole 12, thereby realizing the installation of the control lever 2. This facilitates the quick installation of the rotary switch and also helps to reduce the space occupied by the rotary switch inside the chassis 4.

[0056] refer to Figure 5 As shown, it should be understood that in some scenarios, the switch body 1 can be connected to the circuit board 5 first, and then the connected circuit board 5 and switch body 1 can be placed into the housing 4, and finally the joystick 2 and rotary handle 3 can be installed. This will not be described in detail here.

[0057] like Figure 1-5 As shown, the switch body 1 and the circuit board 5 are detachably connected.

[0058] Main Reference Figure 2 Specifically, pin 11 is bent and attached to circuit board 5, pin 11 has through hole 13, fastener 6 passes through through hole 13 and is connected to circuit board 5.

[0059] The portion of pin 11 that is bent and fits against the conductive part 51 of circuit board 5 has a through hole 13. Fastener 6 passes through the through hole 13 and is threadedly connected to the corresponding conductive part 51, thereby enabling the switch body 1 to be installed on circuit board 5.

[0060] In this way, the switch body 1 and the circuit board 5 are detachably connected, which facilitates the disassembly and maintenance of the switch body 1 as needed.

[0061] Unlike the aforementioned solution where the switch body 1 and circuit board 5 are detachable, such as Figure 6-10 As shown, the main reference is... Figure 6-8 Optionally, pin 11 is inserted into circuit board 5.

[0062] Specifically, the conductive part 51 of the circuit board 5 is provided with a socket 52, and the pin 11 is a pin structure that is inserted into the socket 52, so that the pin 11 is electrically connected to the conductive part 51.

[0063] Generally, pin 11 is soldered to circuit board 5. For example, conductive part 51 includes a solder pad located on the end face of socket 52 away from switch body 1, and one end of pin 11 passing through socket 52 is soldered to the pad by solder, such as solder paste.

[0064] Optionally, in the above embodiments, the rotary switch further includes a sealing structure disposed at the through hole 43.

[0065] Specifically, the sealing structure is set at the through hole 43. The method of sealing the through hole 43 is not limited. For example, the sealing structure is a sealing ring, which is housed in the through hole 43 and sleeved on the operating lever 2. Its radial outer end abuts against the circumferential edge of the through hole 43, and its radial inner end abuts against the operating lever 2.

[0066] like Figure 11-15 As shown, optionally, the rotary switch also includes a limit nut 8, the sealing structure is a first sealing ring 7, the switch body 1 is integrally formed with a cylinder 14 coaxial with the operating lever 2, the cylinder 14 passes through the through hole 43, the first sealing ring 7 is sleeved on the part of the cylinder 14 located inside the housing 4, the limit nut 8 is sleeved on the part of the cylinder 14 located outside the housing 4, and the limit nut 8 is threadedly connected to the cylinder 14, and the operating lever 2 passes through the cylinder 14.

[0067] Specifically, the cylinder 14 is connected to the connection hole 12 of the switch body 1, and the operating lever 2 passes through the cylinder 14 and the connection hole 12.

[0068] For example, after the switch body 1 is connected to the circuit board 5 and placed into the housing 4, after the first sealing ring 7 is put on the cylinder 14, the cylinder 14 can pass through the through hole 43 and be partially exposed in the housing 4 to initially fix the circuit board 5. Then, the limit nut 8 is connected and the circuit board 5 is fixed in the housing 4. Finally, the rotary handle 3 is installed to realize the installation of the rotary switch.

[0069] Of course, it should be understood that the control lever 2 can be set with multiple length segments with different cross-sectional shapes and cross-sectional areas as needed. At least some length segments can be set to have a circular cross-sectional shape. For example, the cross-sectional area of ​​the part where it is joined to the cylinder 14 can be set to the maximum and the cross-sectional shape can be set to a circle. This can be determined according to actual needs.

[0070] In this way, the sealing requirement of the chassis 4 at the through hole 43 can be met, and the rotary switch and circuit board 5 can also be fixed in the chassis 4 to a certain extent.

[0071] like Figure 16As shown, in some other scenarios, optionally, the sealing structure is a second sealing ring 9, which is housed in the through hole 43 and sleeved on the operating lever 2. The radially outer end of the second sealing ring 9 abuts against the circumferential edge of the through hole 43, and the radially inner end abuts against the operating lever 2. This scheme is not shown in the figure.

[0072] At this point, a groove can be provided at the radial outer end of the second sealing ring 9, and the circumferential edge of the through hole 43 can be fitted into the groove, which can also achieve the sealing of the chassis 4 at the through hole 43. This will not be explained in detail here.

[0073] like Figure 15 As shown, in some scenarios, the rotary handle 3 has a protective ring 32. When the rotary handle 3 is connected to the control lever 2, the protective ring 32 is fitted around the outer periphery of the limit nut 8, with a gap between it and the limit nut 8, and with a gap between it and the outer wall of the chassis 4.

[0074] In some scenarios, the rotary handle 3 has a protective ring 32. When the rotary handle 3 is connected to the control lever 2, the protective ring 32 is fitted around the outer periphery of the second sealing ring 9, with a gap between it and the second sealing ring 9, and with a gap between it and the outer wall of the chassis 4.

[0075] In this way, the protective ring 32 can be used to form the protection of the limiting nut 8 or the second sealing ring 9, which is simple in structure and highly practical.

[0076] In the above embodiments, in some scenarios, the rotary handle 3 and the joystick 2 are detachably connected.

[0077] For example, the rotary handle 3 is provided with a slot 31, and the portion of the lever 2 located outside the housing 4 is inserted into the slot 31. This facilitates the installation of the rotary switch.

[0078] In the above embodiments, optionally, the circuit board 5 includes one or more of a boost circuit, an inverter circuit, a string detection circuit, and a switching circuit.

[0079] The function of circuit board 5 may be determined based on actual needs and is not intended as a limitation.

[0080] It should be understood that the mounting position of circuit board 5 can be set as needed.

[0081] In some scenarios, the circuit board 5 is parallel to the base plate 44 of the chassis 4, and divides the inner cavity of the chassis 4 into multiple chambers.

[0082] refer to Figure 13As shown, exemplarily, the end of the chassis 4 opposite to the base plate 44 is provided with an opening, and the wall panel of the chassis 4 adjacent to the base plate 44 is provided with a connecting block 45. When installing the circuit board 5, the circuit board 5 is inserted into the cavity of the chassis 4 through the opening until the circuit board 5 abuts against the connecting block 45. The connection between the circuit board 5 and the connecting block 45 can be achieved through a connector. It should be understood that other components can be installed in the space between the circuit board 5 and the base plate 44, and other components can be installed in the space between the circuit board 5 and the opening. The switch body 1 can be connected to the circuit board 5 before or after the circuit board 5 is placed into the chassis 4 as needed.

[0083] In other scenarios, chassis 4 may not have a connecting block 45, but can be installed using a component near the base plate 44, which will not be described in detail here.

[0084] In this way, the circuit board 5 can divide the inner cavity 41 of the chassis 4 into multiple cavities. Different components can be installed on both sides of the circuit board 5 as needed, and it is convenient to arrange the position of the rotary switch, improving the ease of operation of the rotary switch. This will not be described in detail here.

[0085] In view of the problems existing in the above-mentioned related technologies, in the second aspect of this embodiment, the electrical device provided by this disclosure includes the rotary switch of the above embodiment.

[0086] Secondly, embodiments of this disclosure also provide an electrical device that includes the electrical device described in the above embodiments.

[0087] Specifically, the electrical equipment also includes a chassis 4 and a circuit board 5. The circuit board 5 is located in the inner cavity 41 of the chassis 4. The switch body 1 of the rotary switch is located in the inner cavity 41 of the chassis 4, and the pins 11 of the switch body 1 are connected to the circuit board 5. The operating lever 2 of the rotary switch passes through the through hole 43 of the wall panel 42 of the chassis 4 and is connected to the switch body 1. The rotary handle 3 of the rotary switch is located outside the chassis 4, and the rotary handle 3 is connected to the operating lever 2.

[0088] The electrical device has the beneficial effects of the rotary switch, which will not be described in detail here.

[0089] Another embodiment of this disclosure provides a power system that includes the electrical equipment described in the above embodiments, such as an inverter, and the power system is a photovoltaic system.

[0090] While the above disclosure is provided, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this disclosure.

Claims

1. A rotary switch, characterized in that, include: The switch body (1) is located in the inner cavity (41) of the chassis (4) of the electrical equipment, and the pins (11) of the switch body (1) are connected to the circuit board (5) in the inner cavity (41). The control lever (2) passes through the through hole (43) of the wall panel (42) of the chassis (4) and is connected to the switch body (1); Rotary handle (3), which is located outside the chassis (4) and is connected to the control lever (2).

2. The rotary switch as described in claim 1, characterized in that, The switch body (1) is provided with a connection hole (12), and the control lever (2) is inserted into the connection hole (12).

3. The rotary switch as described in claim 2, characterized in that, The control lever (2) is detachably mounted on the connection hole (12), and the cross-sectional area of ​​the through hole (43) is greater than or equal to the cross-sectional area of ​​the control lever (2).

4. The rotary switch as described in any one of claims 1 to 3, characterized in that, The pin (11) is bent and attached to the circuit board (5). The pin (11) has a through hole (13). The fastener (6) passes through the through hole (13) and is connected to the circuit board (5).

5. The rotary switch as described in any one of claims 1 to 3, characterized in that, The pin (11) is inserted into the circuit board (5).

6. The rotary switch as described in any one of claims 1 to 3, characterized in that, The rotary switch also includes a sealing structure disposed at the through hole (43).

7. The rotary switch as described in claim 6, characterized in that, The rotary switch also includes a limiting nut (8), the sealing structure is a first sealing ring (7), the switch body (1) is integrally formed with a cylinder (14) coaxial with the operating lever (2), the cylinder (14) passes through the through hole (43), the first sealing ring (7) is sleeved on the part of the cylinder (14) located inside the housing (4), the limiting nut (8) is sleeved on the part of the cylinder (14) located outside the housing (4), and the limiting nut (8) is threadedly connected to the cylinder (14), and the operating lever (2) passes through the cylinder (14); Alternatively, the sealing structure is a second sealing ring (9), which is housed in the through hole (43) and sleeved on the operating lever (2). The radial outer end of the second sealing ring (9) abuts against the circumferential edge of the through hole (43), and the radial inner end abuts against the operating lever (2).

8. The rotary switch as claimed in claim 7, characterized in that, The rotary handle (3) is provided with a slot (31), and the part of the control lever (2) located outside the chassis (4) is inserted into the slot (31); the rotary handle (3) is provided with a protective ring (32), and when the rotary handle (3) is connected to the control lever (2), the protective ring (32) is sleeved on the outer periphery of the limiting nut (8) or the second sealing ring (9).

9. The rotary switch as described in any one of claims 1 to 3, characterized in that, The circuit board (5) includes one or more of a boost circuit, an inverter circuit, a string detection circuit, and a switching circuit.

10. The rotary switch as claimed in any one of claims 1 to 3, characterized in that, The circuit board (5) is parallel to the bottom plate (44) of the chassis (4) and divides the inner cavity of the chassis (4) into multiple chambers.

11. An electrical device, characterized in that, The device includes a chassis (4), a circuit board (5), and a rotary switch as described in any one of claims 1 to 10. The circuit board (5) is disposed in the inner cavity (41) of the chassis (4). The switch body (1) of the rotary switch is located in the inner cavity (41) of the chassis (4). The pins (11) of the switch body (1) are connected to the circuit board (5). The operating lever (2) of the rotary switch passes through the through hole (43) of the wall panel (42) of the chassis (4) and is connected to the switch body (1). The rotary handle (3) of the rotary switch is located outside the chassis (4) and is connected to the operating lever (2).

12. An electric power system, characterized in that, Including the electrical equipment as described in claim 11.

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