WO2010052077A1

WO2010052077A1 - Switching device

Info

Publication number: WO2010052077A1
Application number: PCT/EP2009/062704
Authority: WO
Inventors: Xiang Chen; Zhang Yao Bao; Ren Jun Cao
Original assignee: Siemens Aktiengesellschaft
Priority date: 2008-11-10
Filing date: 2009-09-30
Publication date: 2010-05-14
Also published as: DE112009002296T5; CN101740273B; CN101740273A

Abstract

The present invention provides a switching device, which switching device comprises a turntable fitted on a rotary shaft, said turntable can be driven to rotate around said rotary shaft, thereby bringing a switch contact mounted on said turntable to open or close, wherein said turntable comprises a primary turntable and a secondary turntable; said switch contact is fitted on said secondary turntable, so that when said primary turntable rotates, it can bring said secondary turntable to rotate, thereby driving said switch contact to open or close; and said secondary turntable can be operated through a testing switch mechanism constructed by a linking rod mechanism, which makes it possible to rotate independent of said primary turntable and bring said switch contact to open or close. The switching device proposed in the present invention is mainly applicable to low-voltage switches, such as accessories of electrical appliances, in particular alarm switches or auxiliary switches, which can make the switch contact in a switching device open or close without interrupting the primary switch.

Description

Switching device

Technical Field

The present invention relates to an accessory device for low-voltage electrical appliances and, in particular, to a switching device for a low-voltage switch.

Background Art

In a switching device, particularly in a low-voltage switch, such as an accessory of low-voltage electrical appliances, in particular an alarm switch or an auxiliary switch, the switch contact of the switching device is generally mounted on a turntable, and the turntable is driven by an external mechanism connected to the switching device so as to drive the switch contact mounted on the turntable to open or close.

Fig. 1 shows a schematic structural diagram of a turntable 100 in a typical switching device, in which a turntable 100 comprises a turntable body 110, a hole 112 is formed in the turntable body 110, the turntable body 110 is rotatably mounted through the hole 112 onto a rotary shaft of a base (not shown) , a connecting shaft 114 is fitted at one end of the turntable body 110, and the connecting shaft 114 is connected to an external mechanism (not shown) via, for example, a linking rod mechanism.

The two sides of the turntable body 110 of the turntable 100 are respectively provided with several pairs of positioning pieces 116 for mounting switch contacts 120. Each of said switch contacts 120 is mounted between a pair of corresponding positioning pieces 116, and said switch contact 120 is fixed to said positioning pieces 116 by a pair of corresponding positioning springs 130. When in operation, the connecting shaft 114 is driven by said external mechanism operating the linking rod mechanism connected thereto, so as to drive said turntable 100 to rotate about the rotary shaft of said base and finally to bring the switch contacts 120 mounted on the turntable body 110 of said turntable 100 to rotate, so as to open or close said switch contacts 120.

However, in certain circumstances, such as an electric circuit failure, if it is necessary to check the status of each switch contact 120, there is a need to drive said switch contacts 120 to rotate to open or close said switch contacts 120. At this time, it is usually necessary to operate said external mechanism to drive the connecting shaft 114 to rotate the turntable 100, that is to say, if it is desirable to change the status of the switch contacts 120, said turntable 100 has to be driven to rotate, thus in turn the status of said turntable 100 is changed.

However, in practical applications, said external mechanism is generally a part of the primary switch or is connected to other operating mechanisms, such as associated operating components in a circuit breaker, and if it is necessary to change the status of the turntable 100, the status of the primary switch or the associated operating components has to be changed, and probably the operation of the primary switch needs to be interrupted.

Contents of the invention

Therefore, in order to solve the abovementioned technical problems, the present invention aims to provide a switching device, which is capable of making the switch contact of the switching device open or close without interrupting the primary switch.

Particularly, one technical problem to be solved by the present invention is to provide a switching device, in which a switch contact is mounted on a turntable, and the switching device is capable of making the switch contact thereof open or close without changing the status of the operating component connected to said turntable .

Another particular technical problem to be solved by the present invention is to provide a switching device which has a testing switch mechanism which is capable of making the switch contact of the switching device open or close without interrupting the operation of the primary switch.

Particularly, another particular technical problem to be solved by the present invention is to provide a switching device, in which a switch contact is mounted on a turntable, and there is a testing switch mechanism which is capable of making the switch contact of the switching device open or close without changing the status of the operating component connected to said turntable.

In order to solve the above technical problems, the present invention provides a switching device, which switching device comprises a turntable fitted on a rotary shaft, and said turntable can be driven to rotate about said rotary shaft, thereby bringing the switch contact mounted on said turntable to open or close, wherein said turntable comprises a primary turntable and a secondary turntable; said switch contact is fitted on said secondary turntable, so that when said primary turntable rotates, it can bring said secondary turntable to rotate, thereby driving said switch contact to open or close; and said secondary turntable can rotate independent of said primary turntable and bring said switch contact to open or close.

Preferably, said primary turntable and said secondary turntable are concentrically fitted on said rotary shaft, said secondary turntable is provided with a baffle block, and said primary turntable is also provided with a baffle block at the position corresponding to the baffle block of said secondary turntable, so that when said primary turntable is driven to rotate around said rotary shaft, the baffle block of said primary turntable bears against the baffle block of said secondary turntable and drives said secondary turntable to rotate around said rotary shaft.

Preferably, said switching device further comprises a testing switch mechanism which can drive said secondary turntable to rotate, and said testing switch mechanism is a linking rod mechanism.

Preferably, said testing switch mechanism comprises an operating rod which is rotatable around a fixed rotary shaft, said operating rod has an operating end and a connecting end, and said fixed rotary shaft is fitted between said operating end and said connecting end.

Preferably, the connecting end of said operating rod is connected to an intermediate rod, and said operating rod can drive said secondary turntable to rotate via the intermediate rod.

Preferably, the connecting end of said operating rod is connected to an intermediate rod, and said operating rod can drive a sliding rod via the intermediate rod, thereby driving said secondary turntable to rotate.

Preferably, said sliding rod can rotate around a fixed shaft, said sliding rod has a fixed part, a sliding part and a connecting part, and said fixed part is fitted at the fixed shaft of said sliding rod.

Preferably, the connecting part of said sliding rod is located between said sliding part and said fixed part.

Preferably, the fixed part of said sliding rod is located between said sliding part and said connecting part.

Preferably, said secondary turntable has an operating sliding groove, and said sliding part is slidably fitted in said operating sliding groove.

The switching device proposed in the present invention is mainly applicable in low-voltage switches, such as accessories of electrical appliances, in particular, alarm switches or auxiliary switches .

In said alarm switches or auxiliary switches, an external mechanism is operated to drive the secondary turntable connected therewith to open or close the switch contact on the secondary turntable .

Particularly, when said secondary turntable is not driven through said external mechanism and it is not desirable to change the status of said secondary turntable, said secondary turntable can be driven to rotate independently so as to drive the switch contact to rotate to open or close the switch contact.

That is to say, in practical applications, in order to check the status of each switch contact without affecting the normal operation of the external mechanism (e.g. the primary switch) connected to the operation mechanism of the above switching device, a testing switch mechanism constructed by a linking rod mechanism is fitted on the above switching device in the present invention, and the testing switch mechanism is capable of making said switching device control said secondary turntable to rotate independent of said primary turntable so as to drive the switch contact to open or close without changing the status of the primary turntable therein . Description of the drawings

The following drawings are merely for the illustrative description and explanation of the present invention and are not to limit the scope of the present invention. In the drawings:

Fig. 1 shows a schematic structural diagram of a turntable in a typical switching device;

Fig. 2 shows a cross-sectional diagram of a switching device according to a particular embodiment of the present invention, wherein a testing switch mechanism within the part marked by the dotted line is omitted;

Fig. 3 shows an exploded perspective view of a turntable in the switching device according to a particular embodiment of the present invention;

Fig. 4 shows a schematic structural diagram of the turntable in Fig. 3, which is assembled together;

Fig. 5 shows a structural diagram of a switching device according to a particular embodiment of the present invention;

Fig. 6 shows a schematic diagram of the testing switch mechanism in Fig. 5;

Fig. 7 shows a partial perspective view of the testing switch mechanism in Figs 5 and 6;

Fig. 8 shows a structural diagram of a switching device according to another particular embodiment of the present invention;

Fig. 9 shows a schematic diagram of the testing switch mechanism in Fig. 8; and

Fig. 10 shows a structural diagram of a switching device according to yet another particular embodiment of the present invention .

Particular embodiments

In order to understand more clearly the technical features, the objects and the effects of the present invention, the particular embodiments of the present invention are illustrated here with reference to the accompanying drawings, and the same reference numerals in the figures represent the same parts.

Fig. 2 shows a cross-sectional diagram of a switching device 1 according to a particular embodiment of the present invention, for the sake of easy description, a testing switch mechanism 600 within the part marked by the dotted line is omitted (to be described in more detail below) . The switching device l is a low-voltage switch, such as an alarm switch or an auxiliary switch in a primary switch. As is shown in the figure, the switching device 1 has a turntable 100, the turntable 100 is rotatably mounted on a rotary shaft (not shown) of a base, one end of the turntable 100 is connected to a linking rod mechanism 500, and the turntable 100 can be driven by an operating handle device 400 connected to the linking rod mechanism 500.

Figs 3 and 4 show the detailed structure of the turntable 100 in the switching device 1 according to a particular embodiment of the present invention, wherein Fig. 3 shows an exploded perspective view of the turntable 100, and the turntable 100 comprises a primary turntable 200 and a secondary turntable 300. Fig. 4 shows a schematic structural diagram of the turntable 100 in Fig. 3, which is assembled together.

Referring to Fig. 3, the primary turntable 200 comprises a turntable body 210. A hole 212 is formed in said turntable body 210 and said turntable body is rotatably mounted on a rotary shaft (not shown) of a base through the hole 212. One end of said turntable body 210 is provided with a connecting shaft 214. Said connecting shaft 214 is connected to the operation mechanism 400, 500, such as a linking rod mechanism 500 (as shown in Fig. 2) . Said primary turntable 200 can be driven via its hole 212 to rotate about the rotary shaft of said base by operating said operation mechanism, such as the linking rod mechanism 500 and the operating handle device 400. The turntable body 210 of said primary turntable 200 is provided with a baffle block 215 and a flange 217 for cooperating with said secondary turntable 300.

Referring to Fig. 4, the secondary turntable 300 comprises a turntable body 310. A hole 312 is formed in said turntable body 310 and said turntable body is rotatably, concentric to said primary turntable 200, mounted on the rotary shaft of said base through said hole 312. The two sides of the turntable body 310 of said secondary turntable 300 are respectively provided with several pairs of positioning pieces 316 for mounting switch contacts 320. Each of said switch contacts 320 is mounted between a pair of positioning pieces 316, and said switch contact 320 is fixed with said positioning pieces 316 by a pair of positioning springs 330. In this case, one or more of said positioning springs 330 can be replaced by a positioning leaf spring 330' or a positioning torsional spring. The turntable body 310 of said secondary turntable 300 is also provided with a baffle block 315 corresponding to the baffle block 215 on the turntable body 210 of said primary turntable 200.

When said primary turntable 200 is driven to rotate by an operation mechanism (e.g. the linking rod mechanism 500 and the operating handle device 400) connected to an external mechanism (e.g. the primary switch), it pushes said secondary turntable 300 to rotate around the rotary shaft of said base through its hole 312 by means of the baffle block 215 of said primary turntable bearing against the baffle block 315 of said secondary turntable 300, so as to drive the switch contact 320 mounted on said secondary turntable 300 to rotate, so as to open or close said switch contact 320. The turntable body 310 of said secondary turntable 300 is provided with a projection stub 317 corresponding to the flange 217 on the turntable body 210 of said primary turntable 200. When said primary turntable 200 and said secondary turntable 300 are fitted concentrically one above the other, a torsional spring 340 with two torsional feet is sleeved on the projection stub 317 of said secondary turntable 300, with one torsional foot of the torsional spring 340 bearing on said secondary turntable 300, and the other on the projection stub 217 of said primary turntable 200 (shown particularly in Fig. 4) .

Preferably, a groove is formed in the projection stub 317 of said secondary turntable 300, and the torsional foot of said torsional spring 340 bearing on said secondary turntable 300 is fitted in the groove of said projection stub 317. Said primary turntable 200 is connected to said secondary turntable 300 by said torsional spring 340 which makes the baffle block 215 of said primary turntable 200 bear against the baffle block 315 of the secondary turntable, so that when the baffle block 215 of said primary turntable 200 is separated from the baffle block 315 of the secondary turntable under an external force, the baffle block 215 of said primary turntable 200 and the baffle block 315 of the secondary turntable can return to the status of bearing against each other by means of the elastic force of the torsional spring 340.

During normal operation, the connecting shaft 214 of the primary turntable 200 is driven by said external mechanism operating the linking rod mechanism connected thereto, so as to drive said primary turntable 200 to rotate via its hole 212 about the rotary shaft of said base, and since the baffle block 215 on the turntable body 210 of said primary turntable 200 bears against the baffle block 315 of the turntable body 310 of the secondary turntable 300, when said primary turntable 200 rotates, it pushes said secondary turntable 300 to rotate about the rotary shaft of said base through its hole 312, thus driving the switch contact 320 mounted on said secondary turntable 300 to rotate, so as to open or close said switch contacts 320. When it is necessary to drive said switch contacts 320, so as to rotate to open or close said switch contact 320, while it is undesirable to change the status of the primary turntable 200 connected to said external mechanism, by way of an external force independently driving said secondary turntable 300 to rotate, said switch contacts 320 are rotated, so as to open or close said switch contacts 320 without changing the status of said primary turntable 200, and after the above external force has been released, the baffle block 215 of said primary turntable 200 and the baffle block 315 of the secondary turntable can return to the status of bearing against each other by means of the elastic force of the torsional spring 340.

Referring to Fig. 5, since the switching device 1 of the present invention provides the concentrically-fitted primary turntable 200 and secondary turntable 300, said primary turntable 200 is connected to the operation mechanisms 400 and 500, and the switch contact 320 is fitted on said secondary turntable 300. The primary turntable 200 and the secondary turntable 300 are cooperating with each other by the baffle blocks and the torsional springs in a way that: when the primary turntable 200 is driven by said operation mechanisms 400 and 500, it can rotate the secondary turntable 300, thus rotating the switch contacts 320, so as to open or close said switch contacts 320; and when the primary turntable 200 is not driven by said operation mechanisms 400, 500 and it is undesirable to change the status of the primary turntable 200, the secondary turntable 300 can be rotated independently, thus rotating the switch contact 320, so as to open or close said switch contact 320.

That is to say, in practical applications, in order to check the status of each switch contact 320 without affecting the normal operation of the external mechanisms connected to the operation mechanism of the above switching device 1 (e.g. the linking rod mechanism 500 and the operating handle device 400), an additional test switch is fitted on the above switching device 1 of the present invention, so that said switching device 1 can control said secondary turntable 300 to rotate independent of said primary turntable 200 so as to drive the switch contact 320 to open or close without changing the status of the primary turntable 200 therein.

Particularly, referring to Fig. 5, the secondary turntable 300 has an operating sliding groove 350 for driving the secondary turntable 300 to rotate by the testing switch mechanism 600 set in the area marked by the dotted line. For the miniaturization of the low-voltage switches, it is necessary to limit as much as possible the testing switch mechanism 600 within the area marked by the dotted line, and the aim is to save the space as much as possible under the precondition of providing a relatively small number of parts, so as to make it possible to accommodate the whole switching device 1 within all kinds of limited spaces, such as within a circuit breaker .

It can be seen in Fig. 5 that, in order to reduce as much as possible the volume of the whole switching device 1, the space occupied by the secondary turntable 300 should be reduced as much as possible, that is to say, the distance between the rotating center of the secondary turntable 300 (the location of the holes 212 and 312) and the operating sliding groove 350 should be reduced as much as possible so that the secondary turntable 300 does not occupy too much of the reserved space when rotating. However, if the distance between the rotating center of the secondary turntable 300 and the operating sliding groove 350 is too small, then there may be a need to provide more parts for the testing switch mechanism 600 to realize a mechanism taking a small space, therefore, it is necessary in the present invention to provide a mechanism having a small number of parts and taking a small space, so as to operate the operating sliding groove 350 within the limited space above the switching device 1.

Fig. 5 shows a structural diagram of a switching device 1 according to a particular embodiment of the present invention, the switching device has a testing switch mechanism 600, and Fig. 6 shows a schematic diagram of the testing switch mechanism 600 in Fig. 5. As shown in the figures, the testing switch mechanism 600 is a linking rod mechanism. In this case, the testing switch mechanism 600 comprises an operating rod 601, an intermediate rod 602 and a sliding rod 603, and the sliding rod 603 is slidably fitted in the operating sliding groove 350 for operating the secondary turntable 300 to rotate about its rotating center. At this time, if considering the link from the rotating center of the secondary turntable 300 to the operating sliding groove 350 as a linking rod, then this linking rod and another three rods: the operating rod 601, the intermediate rod 602 and the sliding rod 603, jointly form a four-rod connecting mechanism.

The operating rod 601 can rotate around a fixed rotary shaft 611, and the fixed rotary shaft 611 can be fitted on the housing of the switching device 1, or on the secondary turntable 300. The operating rod 600 has an operating end 612 and a connecting end 613, and the fixed rotary shaft 611 is fitted between the operating end 612 and the connecting end 613. The operating end 612 projects out of the housing through an opening (not shown) formed on the housing of the switching device 1, and is driven manually or by other mechanisms to drive the secondary turntable 300 to rotate when the status of each switch contact 320 of the switching device 1 needs to be checked.

The connecting end 613 of the operating rod 601 extends in the housing of the switching device 1 and is connected to one end of the intermediate rod 602, and the other end of the intermediate rod 602 is connected to the sliding rod 603, so that the operating rod 601 can drive the sliding rod 603 via the intermediate rod 602 to rotate the secondary turntable 300. The sliding rod 603 can rotate around a fixed shaft 631, the sliding rod 603 has a fixed part 632, a sliding part 633 and a connecting part 634, and the fixed part 632 is fitted on the fixed shaft 631 of the sliding rod 603. The sliding part 633 can be a slide block or a flange sitting in the operating sliding groove 350 on the secondary turntable 300 and sliding relative to the operating sliding groove 350, so as to drive the secondary turntable 300 to rotate.

In a particular embodiment of the present invention as illustrated in Figs 5 and 6, the connecting part 634 of the sliding rod 603 is located between said sliding part 633 and said fixed part 632, namely, the fixed part 632 of the sliding rod 603 is fitted at one end of the sliding rod 603 and fixed at its fixed shaft 631 to make the sliding rod 603 rotate around the fixed shaft 631. The fixed shaft 631 can be fitted on the housing of the switching device 1 or on the secondary turntable 300. Fig. 7 shows a partial perspective view of the testing switch mechanism 600 in Figs 5 and 6.

Fig. 8 shows a structural diagram of a switching device 1 according to another embodiment of the present invention, and Fig. 9 shows a schematic diagram of the testing switch mechanism 600 in Fig. 8. As shown in the figures, the testing switch mechanism 600 is a linking rod mechanism. In this case, the testing switch mechanism 600 comprises an operating rod 601, an intermediate rod 602 and a sliding rod 603, and the sliding rod 603 is slidably fitted in the operating sliding groove 350 for driving the secondary turntable 300 to rotate about its rotating center. At this time, if considering the link from the rotating center of the secondary turntable 300 to the operating sliding groove 350 as a linking rod, then this linking rod, the operating rod 601, the intermediate rod 602 and the sliding rod 603 jointly form a four-rod connecting mechanism.

The connecting end 613 of the operating rod 601 extends in the housing of the switching device 1 and is connected to one end of the intermediate rod 602, and the other end of the intermediate rod

602 is connected to the sliding rod 603, so that the operating rod 601 can drive the sliding rod 603 via the intermediate rod 602 to rotate the secondary turntable 300. The sliding rod 603 can rotate around a fixed shaft 631, the sliding rod 603 has a fixed part 632, a sliding part 633 and a connecting part 634, and the fixed part 632 is fitted at the fixed shaft 631 of the sliding rod 603. The sliding part 633 can be a slide block or a flange sitting in the operating sliding groove 350 on the secondary turntable 300 and sliding relative to the operating sliding groove 350, so as to drive the secondary turntable 300 to rotate.

In another embodiment of the present invention as shown in Figs 8 and 9, the fixed part 632 of the sliding rod 603 is located between the sliding part 633 and the connecting part 634, namely, the fixed part 632 of the sliding rod 603 is fitted in the middle of the sliding rod 603 and is fixed at its fixed shaft 631 to make the sliding rod

603 rotate around the fixed shaft 631. The fixed shaft 631 can be fitted on the housing of the switching device 1 or on the secondary turntable 300.

Other structures of the embodiment shown in Figs 8 and 9 are basically the same as the above embodiments and are not described here redundantly.

The present invention can, of course, be further simplified, for example, Fig. 10 shows a structural diagram of a switching device 1 according to yet another embodiment of the present invention. In the embodiment shown in Fig. 10, the operating rod 601 can be changed in shape into a turntable or roller wheel rotatable around a fixed rotary shaft 611, a connecting end 613 is eccentrically fitted on the turntable or the wheel, the connecting end 613 can be connected to an intermediate rod 602, the operating rod 601 can directly drive, via the intermediate rod 602, the secondary turntable 300 to rotate, namely, the other end of the intermediate rod 602 can have a slide block or a flange sitting in the operating sliding groove 350 on the secondary turntable 300 and sliding relative to the operating sliding groove 350, so as to drive the secondary turntable 300 to rotate. At this time, if considering the link from the rotating center of the secondary turntable 300 to the operating sliding groove 350 as a linking rod, then this linking rod, the operating rod (turntable or wheel) 601 and the intermediate rod 602 jointly form a linking rod mechanism.

That is to say, in the embodiment shown in Fig. 10, the sliding rod 603 in the previous embodiment is omitted, and the structure is relatively more simplified. Of course, the embodiment shown in Fig. 10 needs more space, this is because of the need to make the intermediate rod 602 directly operate the operating sliding groove 350 of the secondary turntable 300, and the distance between the rotating center of the secondary turntable 300 and the operating sliding groove 350 cannot be too short, otherwise the intermediate rod 602 may not be able to reach the operating sliding groove 350 due to the limitation in the space for its movements.

On the contrary, in the embodiment shown in Figs 5 to 9, since the sliding rod 603 is connected to the intermediate rod 602, the distance between the rotating center of the secondary turntable 300 and the operating sliding groove 350 can be reduced as much as possible without any concern for the limitation of the space for the movements of the intermediate rod 602, because the sliding rod 603 can be used to operate the operating sliding groove 350 indirectly. Therefore, the embodiment shown in Figs 5 to 9 can take a smaller space so as to realize miniaturization of the whole switching device 1.

Other structures of the embodiment shown in Fig. 10 are basically the same as the above embodiments and likewise are not described here redundantly.

Although the exemplary embodiments of the present invention are described above in conjunction with the accompanying drawings, it is to be understood that the present invention is not limited to the above embodiments, and other changes or adapted modifications made by those skilled in the art in accordance with the present invention will not be departing from the scope and spirit of the present invention.

Claims

Cl aims

1. A switching device, which switching device (1) comprises a turntable (100) fitted on a rotary shaft, wherein said turntable (100) can be driven to rotate around said rotary shaft, thereby driving a switch contact (320) mounted on said turntable (100) to open or close, characterized in that said turntable (100) comprises a primary turntable (200) and a secondary turntable (300); said switch contact (320) is fitted on said secondary turntable (300), so that when said primary turntable (200) rotates, it can drive said secondary turntable (300) to rotate, thereby driving said switch contact (320) to open or close, and said secondary turntable (300) can rotate independent of said primary turntable (200) and drive said switch contact (320) to open or close.

2. The switching device as claimed in claim 1, characterized in that said primary turntable (200) and said secondary turntable (300) are concentrically fitted on said rotary shaft, said secondary turntable (300) is provided with a baffle block (315), and said primary turntable (200) is also provided with a baffle block (215) at the position corresponding to the baffle block (315) of said secondary turntable (300), so that when said primary turntable (300) is driven to rotate around said rotary shaft, the baffle block (215) of said primary turntable (200) bears against the baffle block (315) of said secondary turntable (300) and drives said secondary turntable (300) to rotate around said rotary shaft.

3. The switching device as claimed in claim 1 or 2, characterized in that said switching device (1) further comprises a testing switch mechanism (600) which is capable of driving said secondary turntable (300) to rotate, and said testing switch mechanism (600) is a linking rod mechanism.

4. The switching device as claimed in claim 3, characterized in that said testing switch mechanism (600) comprises an operating rod

(601) which is rotatable around a fixed rotary shaft (611), said operating rod (601) has an operating end (612) and a connecting end

(613), and said fixed rotary shaft (611) is provided between said operating end (612) and said connecting end (613) .

5. The switching device as claimed in claim 4, characterized in that the connecting end (613) of said operating rod (601) is connected with an intermediate rod (602), and said operating rod (601) can drive said secondary turntable (300) to rotate via the intermediate rod (602) .

6. The switching device as claimed in claim 4, characterized in that the connecting end (613) of said operating rod (601) is connected with an intermediate rod (602), and said operating rod (601) can bring a sliding rod (603) to move via the intermediate rod (602), thereby driving said secondary turntable (300) to rotate .

7. The switching device as claimed in claim 6, characterized in that said sliding rod (603) can rotate around a fixed shaft (631), said sliding rod (603) has a fixed part (632) , a sliding part (633) and a connecting part (634), with said fixed part (632) being provided at the fixed shaft (631) of said sliding rod (603) .

8. The switching device as claimed in claim 7, characterized in that the connecting part (634) of said sliding rod (603) is located between said sliding part (633) and said fixed part (632) .

9. The switching device as claimed in claim 7, characterized in that the fixed part (632) of said sliding rod (603) is located between said sliding part (633) and said connecting part (634) .

10. The switching device as claimed in one of claims 7 and 8, characterized in that on said secondary turntable (300) there is an operating sliding groove (350), and said sliding part (633) is slidably set in said operating sliding groove (350) .