Circuit breaker

Abstract

The invention relates to the field of low-voltage electric appliances, in particular to a circuit breaker, a second rotating shaft and a first rotating shaft are sequentially arranged in the direction d1, the first rotating shaft is in transmission connection with a moving contact, the rotating shaft directions of the second rotating shaft, the first rotating shaft, a third connecting rod and a lock catch component are parallel to the direction d3, and the second rotating shaft is in transmission connection with the third connecting rod through a rear connecting rod. The thermal tripping mechanism and the magnetic tripping mechanism are respectively in transmission fit with the lock catch component; the thermal tripping mechanism and the magnetic tripping mechanism are sequentially arranged in the direction d1 and are arranged on the same side of the first rotating shaft structure in the direction d2, and the direction d1, the direction d2 and the direction d3 are perpendicular to each other; the circuit breaker is more reasonable and compact in layout.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Art

[0002] A circuit breaker is a switching device used to disconnect and connect a load circuit, and to cut off a fault circuit to prevent the accident from expanding, thereby ensuring the safe operation of the load circuit; among them, a 1U circuit breaker often includes a first circuit (used to control the on and off of the positive pole of the load circuit) and a second circuit (a direct circuit used to electrically connect the negative pole of the load circuit); the first circuit includes a handle and an operating mechanism, the handle slides and drives the contact system to close and disconnect through the operating mechanism; the first circuit also includes a thermal trip mechanism and a magnetic trip mechanism.

[0003] In existing circuit breakers, the layout of the thermal tripping mechanism, the magnetic tripping mechanism and the operating mechanism occupies a large space. Summary of the invention

[0004] The object of the present invention is to overcome at least one defect of the prior art and to provide a circuit breaker with a more reasonable and compact layout.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A circuit breaker comprises an operating mechanism, a thermal tripping mechanism, a magnetic tripping mechanism and a moving contact; the operating mechanism comprises a second rotating shaft, a rear connecting rod and a first rotating shaft structure, the second rotating shaft and the first rotating shaft structure are sequentially arranged along a direction d1; the first rotating shaft structure comprises a first rotating shaft, a third connecting rod and a locking component which are respectively rotatably arranged on the first rotating shaft and snap-fitted, the first rotating shaft is connected to the moving contact by transmission; the rotating shaft directions of the second rotating shaft, the first rotating shaft, the third connecting rod and the locking component are parallel to a direction d3, the second rotating shaft is connected to the third connecting rod by transmission through the rear connecting rod; the thermal tripping mechanism and the magnetic tripping mechanism are respectively matched with the locking component by transmission;

[0007] The thermal tripping mechanism and the magnetic tripping mechanism are sequentially arranged along direction d1 and arranged on the same side of the first rotating shaft structure in direction d2; the directions d1, d2 and d3 are perpendicular to each other.

[0008] Furthermore, one end of the moving contact is inserted into the first rotating shaft and the moving contact is rotatably arranged relative to the first rotating shaft; the first rotating shaft includes a first rotating shaft mounting groove arranged thereon, and a moving contact socket for the moving contact to pass through is provided on the side wall of the mounting groove of the first rotating shaft mounting groove, and the moving contact swings in the moving contact socket when rotating relative to the first rotating shaft;

[0009] The first rotating shaft structure also includes a protective plate arranged on the moving contact and moving synchronously therewith, and the protective plate always shields the moving contact socket;

[0010] The side wall of the installation groove includes a protective plate installation groove for the protective plate to be movably arranged therein, and the protective plate installation groove is located on one side of the first rotating shaft installation groove in the radial direction of the first rotating shaft.

[0011] Furthermore, the protective plate is an arc-shaped plate, and a protective plate installation hole for sleeving on the moving contact is provided in the middle thereof; the protective plate installation groove is an arc-shaped groove.

[0012] Furthermore, the locking component includes a locking body, a first cooperation arm and a second cooperation arm. The locking component is rotatably arranged on the first rotating shaft through the locking body, and one ends of the first cooperation arm and the second cooperation arm are respectively connected to the locking body, and the other ends are respectively in transmission cooperation with the thermal tripping mechanism and the magnetic tripping mechanism.

[0013] Furthermore, the first cooperation arm and the second cooperation arm are arranged in a radial pattern and are offset in the direction d3.

[0014] Furthermore, the thermal tripping mechanism includes a bimetal component and a traction rod. The traction rod is rotatably arranged and the axis direction of the rotating shaft is parallel to the direction d3. The traction rod includes a first traction rod arm and a second traction rod arm. One end of the bimetal component is in transmission cooperation with the first traction rod arm, and the second traction rod arm is in transmission cooperation with the first cooperation arm.

[0015] Furthermore, the magnetic tripping mechanism includes an armature part and a yoke part used in cooperation, and the armature part is in transmission cooperation with the second cooperation arm.

[0016] Furthermore, the armature part is movably arranged along the direction d1 and is oppositely arranged with the yoke part along the direction d1.

[0017] Furthermore, the operating system further includes a contact spring. The contact spring is arranged in the first rotating shaft installation groove, and the contact spring acts on the moving contact to limit the cooperation between the moving contact and the first rotating shaft.

[0018] Furthermore, the contact spring is a torsion spring. The first rotating shaft includes a central column arranged in the first rotating shaft installation groove. The torsion spring is sleeved on the central column, and the two spring arms of the torsion spring are respectively in cooperation with the first rotating shaft and the moving contact.

[0019] Furthermore, a moving contact moving groove is also provided on the side wall of the installation groove. One end of the moving contact passes through the moving contact jack and the first rotating shaft installation groove and is movably arranged in the moving contact moving groove. The contact spring acts on the moving contact to limit the cooperation between the moving contact and the side wall of the moving contact moving groove.

[0020] Furthermore, both the third connecting rod and the locking component are arranged at one axial end of the first rotating shaft, and the first rotating shaft installation groove is arranged at the other axial end of the first rotating shaft.

[0021] Further, the rotation center of the moving contact relative to the first rotating shaft coincides with the rotation center of the first rotating shaft.

[0022] Further, the operating system further includes a main reset member, and the main reset member acts on the first rotating shaft to make it have a rotational tendency to drive the moving contact to move towards the open position; the structure of the first rotating shaft further includes a locking spring, and the locking member is coaxially rotatably arranged with the first rotating shaft. The locking spring is a torsion spring sleeved on the rotating shaft of the locking member, and its two spring arms are respectively engaged with the locking member and the first rotating shaft.

[0023] In the circuit breaker of the present invention, the layout of the thermal tripping mechanism, the magnetic tripping mechanism and the operating mechanism is more reasonable and compact, which is beneficial to reducing the space occupied by the thermal tripping mechanism and the magnetic tripping mechanism.

[0024] In addition, the protection plate can effectively prevent or significantly reduce the entry of charged particles into the installation groove of the first rotating shaft, thereby avoiding or significantly reducing the damage to the contact spring and ensuring the reliable closing of the moving contact and the static contact. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the switch device of the present invention;

[0026] Figure 2 is a sectional view of the switch device of the present invention in the open state;

[0027] Figure 3 is Figure 2 an enlarged schematic structural diagram of part I;

[0028] Figure 4 is a sectional view of the switch device of the present invention in the closed state;

[0029] Figure 5 is the present invention Figure 4 an enlarged schematic structural diagram of part II;

[0030] Figure 6 is a schematic structural diagram of the switch device of the present invention with the housing removed;

[0031] Figure 7 is a schematic structural diagram of the circuit structure of the first circuit and the circuit structure of the second circuit of the present invention;

[0032] Figure 8 is a schematic diagram showing that the locking member is driven by the magnetic tripping mechanism to release the buckling fit between the locking member and the third connecting rod and a schematic diagram showing that the locking member is driven by the thermal tripping mechanism to release the buckling fit between the locking member and the third connecting rod of the present invention;

[0033] Figure 9 is a schematic structural diagram showing that the operating mechanism drives the moving contact to move to the open position after tripping;

[0034] Figure 10 It is a schematic structural view of the rotating shaft, moving contact, protective plate and contact spring of the present invention in the assembled state;

[0035] Figure 11 It is a schematic structural view of the protective plate of the present invention;

[0036] Figure 12 It is an exploded view of the thermal release mechanism of the present invention;

[0037] Figure 13 It is an exploded view of the magnetic release mechanism of the present invention;

[0038] Figure 14 It is a schematic structural view of the locking component of the present invention.

[0039] Explanation of reference numerals

[0040] Outer shell 1a, first outer half shell 1-1a, second outer half shell 1-2a, outer adjustment hole 1-6a;

[0041] First spring limit part 2-11a, second spring limit part 2-12a, first shaft column 2-13a;

[0042] Hole cover 3a;

[0043] Handle 1b, handle connection protrusion 1-5b;

[0044] Operating mechanism 7b, front connecting rod 7-1b, second rotating shaft 7-2b, opening positioning part 7-22b, closing positioning part 7-23b, energy storage cooperation part 7-24b, rear connecting rod 7-3b, first rotating shaft structure 7r, first rotating shaft 7-4b, first rotating shaft main body 7-41b, first rotating shaft installation groove 7-411b, protective plate installation groove 7-412b, moving contact moving groove 7-413b, central column 7-414b, moving contact jack 7-415b, installation groove side wall 7-416b, first rotating shaft cooperation part 7-42b, third connecting rod 7-5b, locking component 7-6b, locking main body 7-61b, force receiving part main body 7-611b, locking part 7-612b, force receiving part 7-64b, first cooperation arm 7-62b, second cooperation arm 7-63b, locking spring 7-7b, main reset part 7-8b, second rotating shaft reset part 7-9b, contact spring 7-10b, protective plate 7-11b, protective plate installation hole 7-111b;

[0045] Electric reclosing mechanism 8b;

[0046] Thermal tripping mechanism 9b, bimetal component 9-123b, bimetallic strip 9-1b, bimetal avoidance hole 9-11b, connecting piece 9-2b, connecting piece jack 9-21b, connecting piece hole 9-22b, adjusting screw 9-3b, heating element 9-4b, traction rod 9-5b, traction rod mounting part 9-51b, first arm of traction rod 9-52b, second arm of traction rod 9-53b;

[0047] Magnetic tripping mechanism 10b, armature part 10-1b, main armature 10-11b, main armature plate 10-111b, armature drive arm 10-112b, drive arm connecting plate 10-1121b, drive arm drive plate 10-1122b, auxiliary armature 10-12b, yoke part 10-2b, yoke 10-21b, magnetic flux increasing plate 10-22b, armature return spring 10-3b, armature guide rod 10-4b;

[0048] Contact system 11b, moving contact 11-1b, moving contact plate 11-11b, moving contact plate connecting section 11-111b, moving contact plate bearing section 11-112b, moving contact point 11-12b, static contact 11-2b, static contact point 11-21b, static contact plate 11-22b, first section of static contact plate 11-221b, second section of static contact plate 11-222b, third section of static contact plate 11-223b;

[0049] Manganin shunt 13b;

[0050] First connection plate 14b;

[0051] First connecting plate 17b;

[0052] Second connecting plate 18b;

[0053] Second connection plate 1c. Detailed implementation manners

[0054] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the switch device of the present invention. The switch device of the present invention is not limited to the descriptions of the following embodiments.

[0055] The present invention discloses a switch device, specifically a circuit breaker. Further, the circuit breaker is a plug-in circuit breaker. Further, the circuit breaker is a 1U circuit breaker.

[0056] As Figure 1-2, as shown in Figures 4, 6 - 7, is an embodiment of the switch device of the present invention. The switch device of this embodiment is a single - pole switch device, which includes a housing and a first circuit and a second circuit arranged in the housing; the first circuit is a negative - pole circuit, and the first circuit preferably includes a break point (for example, a break point that can be disconnected and closed composed of a moving contact and a static contact), that is, the on - off of the first circuit can be controlled by controlling the closing and opening of the break point; the second circuit is a positive - pole circuit, and the second circuit is preferably a direct - through circuit. "Direct - through circuit" means that there is no break point (for example, a break point that can be disconnected and closed composed of a moving contact and a static contact) in the second circuit, and it always remains in a conducting state. Further, for the switch device of this embodiment, during actual use, the two ends of the first circuit are used to connect the negative - pole wire on the power - supply side and the negative - pole wire on the load side, and the two ends of the second circuit are respectively used to connect the positive - pole wire on the power - supply side and the positive - pole wire on the load side.

[0057] Further, for the switch device of the present invention, its length direction, width direction, and height direction are direction d1, direction d2, and direction d3 respectively, and direction d1, direction d2, and direction d3 are perpendicular to each other; the length direction, width direction, and height direction of the housing are the same as direction d1, direction d2, and direction d3 respectively.

[0058] Further, as Figure 1 shown, the housing includes an outer shell 1a, and both the first circuit and the second circuit are arranged in the outer shell 1a. The length direction, width direction, and height direction of the outer shell 1a are the same as direction d1, direction d2, and direction d3 respectively. Specifically, the outer shell 1a includes a first outer half - shell 1 - 1a and a second outer half - shell 1 - 2a that are spliced together relative to each other along direction d2.

[0059] Specifically, in the switch device of the present invention, the dimension of the outer shell 1a in the d2 direction is greater than the dimension of the outer shell 1a in the d3 direction, and the dimension of the outer shell 1a in the d1 direction is greater than the dimension of the outer shell 1a in the d2 direction.

[0060] Further, as Figure 1-2, 4, and 6, the first circuit includes an operating system, a contact system 11b, and an arc extinguishing system. The operating system includes a handle 1b and an operating mechanism 7b. The handle 1b is slidably arranged in the housing (specifically, the handle 1b is slidably arranged in the housing 1a) and switches between the handle closing position and the handle opening position by reciprocating sliding. The contact system 11b includes a moving contact 11-1b and a stationary contact 11-2b used in conjunction with each other. The handle 1b is transmission-connected to the operating mechanism 7b, and the operating mechanism 7b is transmission-connected to the moving contact 11-1b. When the handle 1b slides to the handle closing position, the handle 1b switches to the handle opening position through the operating mechanism The mechanism 7b drives the moving contact 11-1b to the closed position and closes with the static contact 11-2b, that is, the switch device completes the closing operation, and the operating mechanism 7b and the switch device switch from the open state to the closed state; when the handle 1b slides to the handle open position, the handle 1b drives the moving contact 11-1b to the disconnected position through the operating mechanism 7b and disconnects with the static contact 11-2b, that is, the switch device completes the opening operation, and the operating mechanism 7b and the switch device switch from the closed state to the open state; the arc extinguishing system cooperates with the contact system 11b to extinguish the arc generated by the closing and disconnection of the contact system 11b. The handle 1b is pressed by an external force to slide into the housing 1a and switch to the handle closing position, and the handle 1b is pulled by an external force to slide outside the housing 1a and switch to the handle opening position.

[0061] It should be pointed out that the handle 1b is not limited to the sliding setting, and the handle 1b can also be rotatably set on the housing 1a.

[0062] Further, such as Figure 2 , 4 As shown, the moving contact 11-1b and the stationary contact 11-2b are arranged relatively along the direction d2; the rotation axis direction of the moving contact 11-1b is parallel to the direction d3, and the rotation plane of the moving contact 11-1b is parallel to the directions d1 and d2 and perpendicular to the direction d3, so that the moving contact 11-1b can rotate within a larger angle range, thereby improving the breaking capacity of the switch device of the present invention.

[0063] Specifically, the moving contact 11 - 1b includes a moving contact plate 11 - 11b and a moving contact point 11 - 12b. One end of the moving contact plate 11 - 11b is transmission-connected to the operating mechanism 7b and the other end is provided with the moving contact point 11 - 12b.

[0064] Specifically, the static contact 11-2b includes a static contact plate 11-22b and a static contact point 11-21b. The static contact plate 11-22b includes a first section of the static contact plate 11-221b, a second section of the static contact plate 11-222b, and a third section of the static contact plate 11-223b that are sequentially bent and connected. The static contact point 11-21b is disposed on the first section of the static contact plate 11-221b. The first section of the static contact plate 11-221b and the third section of the static contact plate 11-223b are oppositely disposed along the direction d2 and are bent toward the same side of the second section of the static contact plate 11-222b. That is, the static contact plate 11-22b is integrally in a U-shaped structure. The first section of the static contact plate 11-221b and the third section of the static contact plate 11-223b are respectively bent and connected to both ends of the second section of the static contact plate 11-222b. The first section of the static contact plate 11-221b and the third section of the static contact plate 11-223b are located on the same side of the second section of the static contact plate 11-222b. The third section of the static contact plate 11-223b and the static contact point 11-21b are respectively located on both sides of the first section of the static contact plate 11-221b in the direction d2.

[0065] Further, as Figure 2-5As shown, the operating mechanism 7b includes a second rotating shaft 7-2b, a rear connecting rod 7-3b, a first rotating shaft structure 7r and a main reset member 7-8b. The second rotating shaft 7-2b is rotatably arranged, and the handle 1b is driven to rotate in cooperation with the second rotating shaft 7-2b (i.e., the handle 1b switches between the handle closing position and the handle opening position by reciprocating sliding to drive the second rotating shaft 7-2b to reciprocate, and the second rotating shaft 7-2b switches between the second rotating shaft closing position and the second rotating shaft opening position). -2b drives the first rotating shaft structure 7r to rotate through the rear connecting rod 7-3b and the first rotating shaft structure 7r (that is, the second rotating shaft 7-2b switches between the second rotating shaft closing position and the second rotating shaft opening position through the reciprocating rotation and drives the first rotating shaft structure 7r to reciprocate through the rear connecting rod 7-3b, and the first rotating shaft structure 7r switches between the first rotating shaft structure closing position and the first rotating shaft structure opening position), and the first rotating shaft structure 7r includes a third connecting rod 7-5b that is respectively rotatably arranged and snap-fitted. The first rotating shaft structure 7r is connected to the moving contact 11-1b by transmission, and the main reset member 7-8b acts on the first rotating shaft structure 7r to make it have a rotation tendency to drive the moving contact 11-1b to move to the disconnected position, that is, the main reset member 7-8b acts on the first rotating shaft structure 7r to make it have a tendency to rotate toward the opening position of the first rotating shaft structure. For example, when the handle 1b drives the operating mechanism 7b to perform the opening operation or after the operating mechanism 7b is tripped, the main reset member 7-8b moves to the first rotating shaft structure 7r applies a force to make it rotate toward the opening position of the first rotating shaft structure, thereby driving the moving contact 11-1b to move toward the disconnected position; when the operating mechanism 7b is normally opened and closed (that is, when the second rotating shaft 7-2b is driven by an external force - the external force comes from the handle 1b or the electric reclosing mechanism 8b mentioned later - and drives the moving contact 11-1b and the static contact 11-2b to close and disconnect through the first rotating shaft structure 7r), the third connecting rod 7-5b and the locking component 7-6b maintain a snap fit. Further, the operating mechanism 7b also includes a front connecting rod 7-1b, and the handle 1b is connected to the second rotating shaft 7-2b through the front connecting rod 7-1b to drive the second rotating shaft 7-2b to rotate.Furthermore, the first rotating shaft structure 7r also includes a first rotating shaft 7-4b and a locking spring 7-7b that are rotatably arranged. The first rotating shaft structure 7r is rotatably arranged through the first rotating shaft 7-4b. The third connecting rod 7-5b and the locking component 7-6b are rotatably arranged on the rotating shaft 7-4b respectively. The second rotating shaft 7-2b is transmission-connected with the third connecting rod 7-5b through the rear connecting rod 7-3b. The first rotating shaft 7-4b is transmission-connected with the moving contact 11-1b. The main reset member 7-8b acts on the first rotating shaft 7-4b so that the first rotating shaft structure 7r has the function of driving the moving contact. The main reset member 7-8b applies a force to the first rotating shaft 7-4b when the handle 1b drives the operating mechanism 7b to perform the opening operation and after the operating mechanism 7b is tripped, so that the first rotating shaft structure 7r drives the moving contact 11-1b to move to the disconnected position and disconnects from the static contact 11-2b. The locking spring 7-7b acts on the locking member 7-6b to make it have a tendency to rotate relative to the first rotating shaft 7-4b and ensure that the locking member 7-6b and the third connecting rod 7-5b are reliably snap-fitted. Further, the first rotating shaft 7-4b includes a first rotating shaft mating portion 7-42b arranged on its circumferential side wall, and the main reset member 7-8b is a compression spring, one end of which is mated with the first rotating shaft mating portion 7-42b, and the other end is mated with the housing. Furthermore, the rotation axis directions of the second rotation axis 7-2b, the first rotation axis structure 7r, the first rotation axis 7-4b, the third connecting rod 7-5b and the locking component 7-6b are all parallel to the direction d3.

[0066] Specifically, the handle 1b includes a handle connecting protrusion 1-5b, the handle connecting protrusion 1-5b is rotatably connected to one end of the front connecting rod 7-1b, and the other end of the front connecting rod 7-1b is rotatably connected to the third connecting rod 7-5b. The lock spring 7-7b is a torsion spring sleeved on the rotating shaft of the lock component 7-6b, and its two spring arms are respectively matched with the lock component 7-6b and the first rotating shaft 7-4b.

[0067] Further, as shown in 2-5, the operating mechanism 7b also includes a second rotating shaft reset member 7-9b, which acts on the second rotating shaft 7-2b to make it have a rotation tendency to drive the operating mechanism 7b to open the gate, that is, the second rotating shaft reset member 7-9b acts on the second rotating shaft 7-2b to make it have a tendency to rotate toward the second rotating shaft opening position.

[0068] Specifically, the second rotating shaft reset member 7-9b is a torsion spring, which is sleeved on the rotating shaft of the second rotating shaft 7-2b. One spring arm cooperates with the second rotating shaft 7-2b, and the other spring arm is fixedly arranged (for example, this spring arm cooperates with the housing to achieve fixed arrangement). Further, the housing further includes a first shaft column 2-13a and a first spring limiting portion 2-11a and a second spring limiting portion 2-12a arranged around the first shaft column 2-13a. One end of the rotating shaft of the second rotating shaft 7-2b is inserted into the first shaft column 2-13a. The second rotating shaft 7-2b includes a second rotating shaft hole provided therein with an open end opposite to the first shaft column 2-13a and an energy storage cooperation portion 7-24b provided on the inner side wall of the second rotating shaft hole. The helix 7-90b of the second rotating shaft reset member 7-9b, the first spring limiting portion 2-11a and the second spring limiting portion 2-12a are all located in the second rotating shaft hole. One spring arm cooperates with the first spring limiting portion 2-11a and this spring arm is the fixed arm 7-91b, and the other spring arm cooperates with the second spring limiting portion 2-12a and the spring arm is the moving arm 7-92b; when the switch device is closed (that is, when the operating mechanism 7b performs the closing operation), the second rotating shaft 7-2b rotates towards the closing position of the second rotating shaft (that is, in the direction shown in Figure 3 ), when the second rotating shaft 7-2b rotates counterclockwise), the moving arm 7-92b is driven to move through the energy storage cooperation portion 7-24b to store energy in the second rotating shaft reset member 7-9b, and the second rotating shaft 7-2b finally rotates to the closing position of the second rotating shaft; when the switch device is opened (that is, when the operating mechanism 7b performs the opening operation), the second rotating shaft reset member 7-9b releases energy and presses against the energy storage cooperation portion 7-24b through the moving arm 7-92b to make the second rotating shaft 7-2b rotate towards the opening position of the second rotating shaft (that is, in the direction shown in Figure 5In the shown direction (the second rotating shaft 7-2b rotates clockwise), the second rotating shaft 7-2b finally rotates to the opening position of the second rotating shaft. Further, when the switching device opens, the moving arm 7-92b finally acts to cooperate with the second spring limiting part 2-12a; when the switching device is in the open state (i.e., the operating mechanism 7b is in the open state), the second rotating shaft 7-2b is at the opening position of the second rotating shaft, the moving arm is in limiting cooperation with the second spring limiting part 2-12a, the energy storage cooperation part 7-24b and the moving arm 7-92b are only in contact with each other without acting force or there is a gap between them, which is convenient for the first rotating shaft 7-4b to be installed in place without having to overcome the acting force of the second rotating shaft reset part 7-9b. Further, the second rotating shaft 7-2b further includes a tripping positioning part 7-22b and a closing positioning part 7-23b, which are arranged around the rotation center of the second rotating shaft 7-2b. The first spring limiting part 2-11a is located between the tripping positioning part 7-22b and the closing positioning part 7-23b in the rotation direction of the second rotating shaft 7-2b. When the switching device completes tripping (i.e., when the second rotating shaft 7-2b is at the opening position of the second rotating shaft), the tripping positioning part 7-22b is in limiting cooperation with the first spring limiting part 2-11a. When the switching device completes closing (i.e., when the second rotating shaft 7-2b is at the closing position of the second rotating shaft), the closing positioning part 7-23b is in limiting cooperation with the first spring limiting part 2-11a. The tripping positioning part 7-22b and the closing positioning part 7-23b cooperate with the first spring limiting part 2-11a to accurately and reliably limit the rotation stroke of the second rotating shaft 7-2b, ensuring the reliable and stable operation of the operating mechanism 7b. Further, both the tripping positioning part 7-22b and the closing positioning part 7-23b are arranged on the inner side wall of the second rotating shaft hole.

[0069] As Figure 10-11 shown, a kind of assembly method of the first rotating shaft 7-4b and the moving contact 11-1b is as follows:

[0070] One end of the moving contact 11-1b is inserted into the first rotating shaft 7-4b, and the moving contact 11-1b is rotatably arranged relative to the first rotating shaft 7-4b; the operating system further includes a contact spring 7-10b, and the contact spring 7-10b acts on the moving contact 11-1b to limit and cooperate with the first rotating shaft 7-4b. When the moving contact 11-1b is closed with the static contact 11-2b, the moving contact 11-1b rotates relative to the first rotating shaft 7-4b to compress the contact spring 7-10b, and the acting force of the contact spring 7-10b makes the moving contact 11-1b reliably contact with the static contact 11-2b; the first rotating shaft 7-4b includes a first rotating shaft main body 7-41b, the first rotating shaft main body 7-41b includes a first rotating shaft installation groove 7-411b arranged therein, and the first rotating shaft installation groove 7-411b is provided with an installation groove opening for the contact spring 7-10b to be installed therein. The installation groove opening is arranged at one axial end of the first rotating shaft 7-4b (specifically, one axial end of the first rotating shaft main body 7-41b). The contact spring 7-10b is arranged in the first rotating shaft installation groove 7-411b and cooperates with the moving contact 11-1b and the first rotating shaft 7-4b respectively; the side wall of the first rotating shaft installation groove 7-411b is the installation groove side wall 7-416b, and the installation groove side wall 7-416b is provided with a moving contact insertion hole 7-415b for the moving contact 11-1b to pass through. When the moving contact 11-1b rotates relative to the first rotating shaft 7-4b, it swings in the moving contact insertion hole 7-415b. The first rotating shaft structure 7r further includes a protection plate 7-11b arranged on the moving contact 11-1b and moving synchronously with it. The protection plate 7-11b always blocks the moving contact insertion hole 7-415b, that is, when the moving contact 11-1b is relatively stationary with the first rotating shaft 7-4b, the protection plate 7-11b blocks the moving contact insertion hole 7-415b, and when the moving contact 11-1b rotates relative to the first rotating shaft 7-4b, the protection plate 7-11b also blocks the moving contact insertion hole 7-415b. Further, the shape of the moving contact insertion hole 7-415b is adapted to the moving track when the moving contact 11-1b rotates relative to the first rotating shaft 7-4b, and the contact spring 7-10b acts on the moving contact 11-1b to limit and cooperate with one end of the moving contact insertion hole 7-415b. In order to realize the assembly of the moving contact 11-1b and the first rotating shaft 7-4b, the dimension of the moving contact insertion hole 7-415b in the axial direction of the first rotating shaft 7-4b must meet the requirement that one end of the moving contact 11-1b provided with the moving contact point 11-12b can pass through smoothly.

[0071] The benefits brought by the protection plate 7-11b are as follows: it can effectively prevent or significantly reduce the entry of charged particles into the first rotating shaft installation groove 7-411b, thereby avoiding or significantly reducing the damage to the contact spring 7-10b and other components, and ensuring the reliable closing of the moving contact 11-1b and the static contact 11-2b.

[0072] Specifically, the third link 7-5b and the locking member 7-6b are both provided at one axial end of the first rotating shaft 7-4b (specifically, at one axial end of the first rotating shaft body 7-41b), and the first rotating shaft mounting groove 7-411b is provided at the other axial end of the first rotating shaft 7-4b (specifically, at the other axial end of the first rotating shaft body 7-41b); the first rotating shaft mounting groove 7-411b has an annular side wall.

[0073] Specifically, the side wall of the mounting groove 7-416b further includes a protective plate mounting groove 7-412b for the protective plate 7-11b to be movably disposed therein, and the protective plate mounting groove 7-412b is located on the radial side of the first rotating shaft mounting groove 7-411b. Further, the protective plate 7-11b is an arc-shaped plate, and a protective plate mounting hole 7-111b is provided in the middle thereof. The protective plate 7-11b is sleeved on the moving contact 11-1b through the anti-slip plate mounting hole 7-111b, and the shape of the anti-slip plate mounting hole 7-111b is adapted to the moving contact 11-1b to minimize the gap between the moving contact 11-1b and the side edge of the anti-slip plate mounting hole 7-111b; the protective plate mounting groove 7-412b is an arc-shaped groove.

[0074] Specifically, the contact spring 7-10b is a torsion spring. The first rotating shaft 7-4b includes a central column 7-414b disposed in the first rotating shaft mounting groove 7-411b. The torsion spring is sleeved on the central column 7-414b, and its two spring arms are respectively engaged with the first rotating shaft 7-4b and the moving contact 11-1b. The contact spring 7-10b acts on the moving contact 11-1b to limit the cooperation between the moving contact 11-1b and the first rotating shaft 7-4b. When the switch device of the present invention is closed, the first rotating shaft 7-4b drives the moving contact 11-1b to rotate until the moving contact 11-1b contacts and conducts with the static contact 11-2b. The first rotating shaft 7-4b continues to rotate and move an angle, causing the first rotating shaft 7-4b and the moving contact 11-1b to rotate relative to each other and storing energy in the contact spring 7-10b to achieve an overtravel. The force exerted by the contact spring 7-10b on the moving contact 11-1b causes the moving contact 11-1b to be reliably closed with the static contact 11-2b. When the switch device of the present invention is opened, the first rotating shaft 7-4b and the moving contact 11-1b first rotate relative to each other. The moving contact 11-1b resumes the limiting cooperation with the first rotating shaft 7-4b under the action of the contact spring 7-10b, and then the moving contact 11-1b moves to the open position under the drive of the first rotating shaft 7-4b. Further, the central column 7-414b is coaxially arranged with the first rotating shaft 7-4b. Further, the central column 7-414b also serves as the rotating shaft of the first rotating shaft 7-4b and is rotatably connected to the housing. Further, the rotation center of the moving contact 11-1b relative to the first rotating shaft 7-4b coincides with the rotation center of the first rotating shaft 7-4b, and the moving contact 11-1b is rotatably sleeved on the central column 7-414b. Further, the side wall 7-416b of the mounting groove is also provided with a moving contact moving groove 7-413b, and one end of the moving contact 11-1b ( Figure 10The free end of the moving contact plate connection section 11-111b of the moving contact 11-1b shown is used to be connected to a wire to connect the moving contact 11-1b to the corresponding circuit. This end of the moving contact 11-1b is movably arranged in the moving contact slot 7-413b. During assembly, the end of the moving contact 11-1b provided with the moving contact point 11-12 passes through the moving contact jack 7-415b, and the moving contact 11-1b is sleeved on the central column 7-414b, so that the free end of the moving contact plate connection section 11-111b is placed in the moving contact slot 7-413b. Further, the moving contact jack 7-415b and the moving contact slot 7-413b are arranged at the axial two ends of the first rotating shaft 7-4b. Further, the moving contact plate 11-11b of the moving contact 11-1b includes a moving contact plate bearing section 11-112b and a moving contact plate connection section 11-111b. One end of the moving contact plate bearing section 11-112b is connected to one end of the moving contact plate connection section 11-111b. A moving contact shaft hole is provided at the connection part of the two. The moving contact 11-1b is sleeved on the central column 7-414b through the moving contact shaft hole. The other end of the moving contact bearing section 11-112b is provided with a moving contact point 11-12b, and the other end of the moving contact plate connection section 11-111b is movably arranged in the moving contact slot 7-413b.

[0075] Further, as Figure 2 、 4 shown, the operating system further includes an automatic reclosing mechanism 8b. The automatic reclosing mechanism 8b is in transmission cooperation with the handle 1b or the second rotating shaft 7-2b to drive the operating mechanism 7b to trip and close. In this embodiment, the automatic reclosing mechanism 8b is preferably in transmission cooperation with the second rotating shaft 7-2b. The automatic reclosing mechanism 8b is beneficial to realize the remote closing and remote tripping of the switch device of the present invention.

[0076] Further, as Figure 2 、 4 、6 shown, the switch device further includes a first wiring device and a second wiring device arranged in the housing. Among the first wiring device and the second wiring device, one is an outgoing wire wiring device and the other is an incoming wire wiring device. The first wiring device includes a first negative wiring device and a first positive wiring device. The second wiring device includes a second negative wiring device and a second positive wiring device. The first negative wiring device and the second negative wiring device are respectively connected in series at both ends of the first circuit (i.e., the negative circuit), that is, the first circuit is connected to the corresponding external circuit through the first negative wiring device and the second negative wiring device. The first positive wiring device and the second positive wiring device are respectively connected in series at both ends of the second circuit (i.e., the positive circuit / direct-through circuit), and the second circuit is connected to the corresponding external circuit through the first positive wiring device and the second positive wiring device.

[0077] Specifically, the first wiring device and the second wiring device are respectively arranged at both ends of the housing. The first wiring device is an outgoing wire wiring device, and the second wiring device is an incoming wire wiring device. The second wiring device is a plug-in type wiring device, such as a bus bar clamp.

[0078] Further, as Figure 7 shown, the first circuit further includes a first connecting plate 14b. The first negative electrode wiring device, the first connecting plate 14b, the contact system 11b, and the second negative electrode wiring device are connected in series in sequence. Specifically, the first negative electrode wiring device, the first connecting plate 14b, the moving contact 11-1b, the static contact 11-2b, and the second negative electrode wiring device are connected in series in sequence. Further, the first connecting plate 14b is a metal conductive plate.

[0079] Further, as Figure 6-7 shown, the first circuit further includes a manganin shunt 13b. The manganin shunt 13b is preferably connected in series between the contact system 11b and the second negative electrode wiring device; specifically, the manganin shunt 13b is connected in series between the static contact 11-2b and the second negative electrode wiring device. Further, the first circuit further includes a second connecting plate 18b. The manganin shunt 13b is electrically connected to the static contact plate 11-22b of the static contact 11-2b through the second connecting plate 18b. Further, the manganin shunt 13b and the second connecting plate 18b are preferably of an integral structure, and the two are bent and connected; the plane where the manganin shunt 13b is located is perpendicular to the direction d3; the second connecting plate 18b and the third section 12-223b of the static contact plate of the static contact plate 12-22b are stacked and fixed together along the direction d2 and are electrically connected.

[0080] Further, as Figure 7 shown, the second circuit further includes a second connecting plate 1c. The first positive electrode wiring device, the second connecting plate 1c, and the second positive electrode wiring device are connected in series in sequence. Further, the second connecting plate 1c is a metal conductive plate.

[0081] Further, as Figure 2 、 4 、6, 8-9 shown, the operating system further includes a thermal release mechanism 9b and / or a magnetic release mechanism 10b. The thermal release mechanism 9b and / or the magnetic release mechanism 10b are used to respectively drive the locking component 7-6b to rotate and release the latching cooperation with the third connecting rod 7-5b when an overload fault and / or a short-circuit fault occurs in the circuit where the switching device is located (which is also the circuit where the contact system 11b, the moving contact 11-1b, and the static contact 11-2b are located), so that the operating mechanism 7b trips; as Figure 8As shown in (81), when a short - circuit fault occurs in the circuit where the switching device of the present invention is located, the locking member 7 - 6b rotates under the action of the magnetic release 10b, so that the locking member 7 - 6b is disengaged from the third link 7 - 5b. At this time, the moving contact 11 - 1b and the static contact 11 - 2b have not been disconnected; as Figure 8 (82), when an overload fault occurs in the circuit where the switching device of the present invention is located, the locking member 7 - 6b rotates under the drive of the thermal release mechanism 9b, so that the locking member 7 - 6b is disengaged from the third link 7 - 5b. At this time, the moving contact 11 - 1b and the static contact 11 - 2b have not been disconnected. Further, the locking member 7 - 6b includes a first engaging arm 7 - 62b and a second engaging arm 7 - 63b. The thermal release mechanism 9b is in transmission cooperation with the first engaging arm 7 - 62b to drive the locking member 7 - 6b to rotate and disengage from the third link 7 - 5b when an overload fault occurs in the circuit where the switching device is located. The magnetic release mechanism 10b is in transmission cooperation with the second engaging arm 7 - 63b to drive the locking member 7 - 6b to rotate and disengage from the third link 7 - 5b when a short - circuit fault occurs in the circuit where the switching device is located. Further, the locking member 7 - 6b further includes a locking body 7 - 61b. The locking member 7 - 6b is rotatably arranged on the first rotating shaft 7 - 4b of the first rotating shaft structure 7r through the locking body 7 - 61b. The first engaging arm 7 - 62b and the second engaging arm 7 - 63b are respectively connected to the locking body 7 - 61b.

[0082] Further, as Figure 14 shown, the locking member 7 - 6b includes a locking part 7 - 612b and a force - receiving part 7 - 64b that are fixed together and rotate coaxially and synchronously; the locking part 7 - 612b is used for snap - fitting with the third link 7 - 5b. The third link 7 - 5b and the locking part 7 - 612b are metal parts, with high structural strength and long service life; the force - receiving part 7 - 64b includes a force - receiving part body 7 - 611b, a first engaging arm 7 - 62b and a second engaging arm 7 - 63b. One ends of the first engaging arm 7 - 62b and the second engaging arm 7 - 63b are respectively connected to the force - receiving part body 7 - 611b, and the other ends are respectively in transmission cooperation with the thermal release mechanism 9b and the magnetic release mechanism 10b; the force - receiving part 7 - 64b is an insulating part, with good insulation performance, which is beneficial to improving the insulation performance of the operating mechanism 7b; the locking part 7 - 612b and the force - receiving part body 7 - 611b cooperate to form the locking body 7 - 61b. Further, the locking part 7 - 612b and the force - receiving part body 7 - 611b are stacked along the axis direction of the locking member 7 - 6b.

[0083] Further, the thermal tripping mechanism 9b and the magnetic tripping mechanism 10b are arranged side by side along the direction d1, and both are arranged on the same side of the operating mechanism 7b, with a more reasonable and compact layout, which is conducive to reducing the space occupied by the thermal tripping mechanism 9b and the magnetic tripping mechanism 10b. Specifically, the thermal tripping mechanism 9b and the magnetic tripping mechanism 10b are arranged on the same side of the operating mechanism 7b along the direction d2.

[0084] Specifically, as Figure 8-9As shown in Fig. 12, the thermal release mechanism 9b includes a bimetal 9-1b. The thermal release mechanism 9b is connected in series between the first connection plate 14b and the contact system 11b. Further, the thermal release mechanism 9b includes a bimetal assembly 9-123b and a traction rod 9-5b. The traction rod 9-5b is rotatably arranged and the axis direction is parallel to the direction d3. The traction rod 9-5b includes a first traction rod arm 9-52b and a second traction rod arm 9-53b. One end of the bimetal assembly 9-123b is fixedly arranged and the other end is in driving cooperation with the first traction rod arm 9-52b of the traction rod 9-5b to drive the traction rod 9-5b to rotate. The second traction rod arm 9-53b is in driving cooperation with the first mating arm 7-62b of the latch member 7-6b to drive the latch member 7-6b to rotate, so that the latch member 7-6b is disengaged from the latching cooperation with the third link 7-5b. Further, the traction rod 9-5b further includes a traction rod mounting portion 9-51b. The traction rod 9-5b is rotatably arranged through the traction rod mounting portion 9-51b. The axis direction of the traction rod 9-5b is parallel to the direction d3. One ends of the first traction rod arm 9-52b and the second traction rod arm 9-53b are connected to the traction rod mounting portion 9-51b and are circumferentially distributed along the traction rod mounting portion 9-51b. Further, the bimetal assembly 9-123b includes a bimetal 9-1b, a connecting member 9-2b and an adjusting screw 9-3b. The length of the bimetal 9-1b extends along the direction d1. One end is fixedly arranged and the other end is inserted into the connecting member 9-2b. The connecting member 9-2b is a plastic part. The adjusting screw 9-3b is a self-tapping screw and is arranged on the connecting member 9-2b. The adjusting screw 9-3b is in driving cooperation with the first traction rod arm 9-52b of the traction rod 9-5b. The adjusting screw 9-3b facilitates adjusting the driving gap between the bimetal assembly 9-123b and the first traction rod arm 9-52b of the traction rod 9-5b according to actual needs. In the prior art, the adjusting screw 9-3b is directly arranged on the bimetal 9-1b. After adjusting the position of the adjusting screw 9-3b through testing, thread sealant is applied to fix the adjusting screw 9-3b and the bimetal 9-1b together. The adjusting screw 9-3b cannot be adjusted again, and then the housing assembly is completed. In this embodiment, the adjusting screw 9-3b is arranged on the connecting member 9-2b. After the switch device in this embodiment is assembled, the adjusting screw 9-3b can be adjusted again. The cooperation between the adjusting screw 9-3b and the connecting member 9-2b can ensure that the adjusting screw 9-3b is stably and reliably held in the working position, so that the thermal release mechanism 9b can reliably, timely and accurately drive the operating mechanism 7b to trip.Furthermore, the bimetal sheet 9-1b is provided with a bimetal avoidance hole 9-11b for avoiding the adjusting screw 9-3b; the connecting member 9-2b includes a connecting member socket hole 9-21b provided therein and connecting member holes 9-22b provided on a pair of side walls of the connecting member socket hole 9-21b; the aperture of the bimetal avoidance hole 9-11b is larger than the aperture of the connecting member hole 9-22b and the outer diameter of the adjusting screw 9-3b, and the aperture of the connecting member hole 9-22b is smaller than the outer diameter of the adjusting screw 9-3b, so as to prevent interference between the adjusting screw 9-3b and the bimetal sheet 9-1b when the adjusting screw 9-3b is screwed, and ensure that the adjusting screw 9-3b is reliably held at the working position after adjustment; one end of the bimetal sheet 9-1b is inserted into the connecting member socket hole 9-21b, so that the bimetal avoidance hole 9-11b and the connecting member hole 9-22b are correspondingly matched.

[0085] Specifically, as Figure 8-9 shown in FIGS. 11 and 12, the thermal trip mechanism 9b further includes a thermal element 9-4b. One end of the bimetal sheet 9-1b is fixedly installed on the thermal element 9-4b. The thermal element 9-4b is in limit fit with the housing for realizing the fixed installation of the bimetal assembly 9-123b, and is also used for being electrically connected to the first connection plate 14b. Furthermore, the first circuit further includes a first connection plate 17b. The first connection plate 14b is electrically connected to the thermal element 9-4b through the first connection plate 17b. Furthermore, the first connection plate 14b and the first connection plate 17b are preferably of an integral structure, and the two are bent and connected; the first connection plate 17b and the thermal element 9-4b are stacked and fixed together in the direction d2 and are electrically connected. Furthermore, the thermal element 9-4b is of a plate-like structure, and the plane where it is located and the first connection plate 17b are both perpendicular to the direction d2.

[0086] Furthermore, as Figure 1 shown in FIG. 13, the housing of the switch device of the present invention is further provided with an adjustment hole for operating the adjusting screw 9-3b; specifically, the adjustment hole includes an outer adjustment hole 1-6a provided on the outer shell 1a; the switch device of the present invention further includes a hole cover 3a for blocking the outer adjustment hole 1-6a. After the operator completes the adjustment of the position of the adjusting screw 9-3b, the hole cover 3a is covered on the outer adjustment hole 1-6a.

[0087] Specifically, as Figure 8-9As shown in FIGS. 13, the magnetic trip mechanism 10b is an electromagnetic trip mechanism. The electromagnetic trip mechanism includes an armature member 10-1b, a yoke member 10-2b, an armature return spring 10-3b, and a conductive plate that are used in cooperation. The armature return spring 10-3b acts on the armature member 10-1b to give it a tendency to move away from the yoke member 10-2b. The conductive plate is used to be connected in series in the circuit to be disconnected (in this embodiment, the first circuit is the circuit to be disconnected, and the conductive plate is implemented by the static contact plate 11-22b of the static contact 11-2b), and at least a part of it is inserted into the yoke member 10-2b. When a short-circuit current flows through the circuit to be disconnected, an electromagnetic field is generated and the armature member 10-1b is attracted by the yoke member 10-2b. The armature member 10-1b drives the latch member 7-6b to rotate so that it releases the latching cooperation with the third link 7-5b.

[0088] Further, the armature member 10-1b and the yoke member 10-2b are arranged opposite to each other along the direction d1, and the armature member 10-1b reciprocates along the direction d1 to be attracted to and separated from the yoke member 10-2b. Further, the second section 11-222b of the static contact plate of the static contact plate 11-22b passes through the middle of the yoke member 10-2b, and the first section 11-221b and the third section 11-223b of the static contact plate are respectively located on both sides of the yoke member 10-2b along the direction d2.

[0089] Further, the magnetic trip mechanism 10b further includes an armature guide rod 10-4b, and the armature guide rod 10-4b cooperates with the armature member 10-1b to guide the armature member 10-1b.

[0090] Specifically, one end of the armature guide rod 10-4b is fixedly connected to the armature member 10-1b, and the other end is slidably arranged in the armature guide hole on the bottom wall of the yoke member of the yoke member 10-2b. The armature guide hole is formed by splicing the guide holes provided on the conductive plate, the yoke bottom plate, and the magnetic flux increasing plate 10-22b along the direction d1. The armature return spring 10-3b is a compression spring, sleeved on the armature guide rod 10-4b, and its two ends respectively cooperate with the armature member 10-1b and the conductive plate.

[0091] As another embodiment of the armature guide rod 10-4b, a set of armature guide rods 10-4b are provided on each of the two yoke arms of the yoke member 10-2b. The armature guide rods 10-4b extend along the direction d1 and one end of each is connected to the yoke arm. The armature member 10-1b includes armature sliding holes or armature sliding grooves that cooperate with the two sets of armature guide rods 10-4b.

[0092] Further, the armature member 10-1b includes a main armature 10-11b and a sub-armature 10-12b. The main armature 10-11b includes a main armature plate 10-111b and an armature drive arm 10-112b. One end of the armature drive arm 10-112b is bent and connected to the main armature plate 10-111b, and the other end is used to output a driving force. The driving force is used to drive the latch member 7-6b to rotate so as to release the latching fit with the third link 7-5b. The main armature plate 10-111b and the sub-armature 10-12b are stacked along the direction d1. The structural design of the armature member 10-1b can reduce the thickness requirement for the main armature 10-11b, reduce the forming difficulty of the armature drive arm 10-112b, and facilitate processing. The cooperation between the sub-armature 10-12b and the main armature 10-11b ensures the reliable cooperation between the armature member 10-1b and the yoke member 10-2b. The number of the sub-armatures 10-12b can be adjusted according to actual needs. The number of the sub-armatures 10-12b ≥ 1, and the sub-armature 10-12b and the main armature 10-11b are preferably of a split structure. In this embodiment, the sub-armature 10-12b is preferably arranged closer to the yoke member 10-2b relative to the main armature plate 10-111b of the main armature 10-11b. The armature drive arm 10-112b includes a drive arm connecting plate 10-1121b and a drive arm drive plate 10-1122b. The drive arm connecting plate 10-1121b extends along the direction d1, one end is bent and connected to the main armature plate 10-111b, and the other end is bent and connected to the drive arm drive plate 10-1122b. The drive arm drive plate 10-1122b is arranged parallel to the main armature plate 10-111b.

[0093] As other embodiments of the armature member 10-1b, the main armature plate 10-111b and the sub-armature 10-12b are of an integral structure, and one end of the two is bent and connected. When the armature member 10-1b includes a plurality of sub-armatures 10-12b, adjacent sub-armatures 10-12b are bent and connected to each other.

[0094] Further, as Figure 2 、 4 shown, the yoke member 10-2b is arranged close to the contact system 11b.

[0095] Further, the yoke member 10-2b includes a yoke bottom wall and yoke arms. The two yoke arms are arranged oppositely and are respectively bent and connected to both ends of the yoke bottom wall. The conductive plate is inserted between the two yoke arms and is stacked with the yoke bottom wall along the direction d1. Further, the yoke member 10-2b includes a yoke 10-21b and at least one magnetic flux enhancing plate 10-22b. The yoke 10-21b includes a yoke bottom plate and yoke arms. The two yoke arms are arranged oppositely and are respectively bent and connected to both ends of the yoke member. The yoke bottom plate is stacked with the magnetic flux enhancing plate 10-22b along the direction d1. The yoke bottom plate and the magnetic flux enhancing plate 10-22b together form the yoke bottom wall of the yoke member 10-2b. The yoke bottom plate and the magnetic flux enhancing plate 10-22b are preferably of a split structure. The magnetic flux enhancing plate 10-22b can increase the magnetic suction force, improve the reliability of the cooperation between the armature member 10-1b and the yoke member 10-2b, and increase the magnetic field of the yoke member 10-2b, thereby accelerating the arc generated by the moving contact 11-1b and the static contact 11-2b into the arc extinguishing chamber 12-1b. Further, the conductive plate and the magnetic flux enhancing plate 10-22b are located on both sides of the yoke bottom plate in the direction d1, and the conductive plate, the yoke bottom plate and the magnetic flux enhancing plate 10-22b are fixedly connected together.

[0096] As other embodiments of the yoke member 10-2b, the magnetic flux enhancing plate 10-22b is not provided on the yoke member 10-2b; or, the yoke member 10-2b and the magnetic flux enhancing plate 10-22b are of an integral structure and are bent and connected to each other.

[0097] Specifically, as shown in Figure 2 、 4 Figures 8-9, the first mating arm 7-62b and the second mating arm 7-63b are arranged radially, that is, the extension lines of the first mating arm 7-62b and the second mating arm 7-63b both pass through the rotation center of the locking member 7-6b. One end of the first mating arm 7-62b is connected to the locking body 7-61b and the other end is used for driving cooperation with the thermal release mechanism 9b. One end of the second mating arm 7-63b is connected to the locking body 7-61b and the other end is used for driving cooperation with the magnetic release mechanism 10b. The first mating arm 7-62b and the second mating arm 7-63b are arranged offset in the direction d3 (which is also the axis direction of the locking member 7-6b). The first mating arm 7-62b and the drive arm connecting plate 10-1121b are respectively located on both sides of the second mating arm 7-63b in the direction d3. The drive arm driving plate 10-1122b is located between the first mating arm 7-62b and the second mating arm 7-63b in the rotation direction of the locking member 7-6b. The free end of the drive arm driving plate 10-1122b is spaced from the first mating arm 7-62b in the direction d3, so as to prevent interference between the first mating arm 7-62b and the drive arm driving plate 10-1122b when the locking member 7-6b rotates, which affects the tripping of the operating mechanism 7b.

[0098] Specifically, as Figure 13 shown, the armature member 10-1b further includes an armature avoidance notch for avoiding the second mating arm 7-63b when the latch member 7-6b is driven by the thermal release mechanism 9b to rotate.

[0099] Furthermore, the first connection plate 14b and the second connection plate 1c are respectively arranged at both ends inside the housing 1a along the direction d3, so as to utilize more internal space of the housing 1a to increase the structural dimensions of the first connection plate 14b and the second connection plate 1c, thereby increasing their current-carrying capacity.

[0100] Furthermore, the electric reclosing mechanism 8b is arranged between the handle 1b and the operating mechanism 7b in the direction d1.

[0101] Furthermore, the thermal release mechanism 9b and the magnetic release mechanism 10b are located on the same side of the operating mechanism 7b in the direction d2. The thermal release mechanism 9b and the magnetic release mechanism 10b are arranged side by side in the direction d1. The thermal release mechanism 9b, the magnetic release mechanism 10b, the first connection plate 17b and the second connection plate 18b are located on the same side of the operating mechanism 7b in the direction d2. Further, the bimetal 9-1b of the thermal release mechanism 9b extends in the direction d1; the armature member 10-1b of the magnetic release mechanism 10b and the yoke member 10-2b are arranged side by side in the direction d1, and the armature member 10-1b is arranged to move in the direction d1; the bimetal 9-1b, the armature member 10-1b and the yoke member 10-2b are arranged in sequence in the direction d1.

[0102] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is habitually placed during use. It is only for the convenience of description and does not indicate that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for differential description and cannot be construed as indicating relative importance.

[0103] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A circuit breaker, which comprises an operating mechanism (7b), a thermal tripping mechanism (9b), a magnetic tripping mechanism (10b) and a moving contact (11-1b); the operating mechanism (7b) includes a second rotating shaft (7-2b) rotatably arranged, a rear connecting rod (7-3b) and a first rotating shaft structure (7r), the second rotating shaft (7-2b) and the first rotating shaft structure (7r) are arranged in sequence along the direction d1; the first rotating shaft structure (7r) includes a first rotating shaft (7-4b) rotatably arranged and a third connecting rod (7-5b) and a locking component (7-6b) respectively rotatably arranged on the first rotating shaft (7-4b) and buckled and matched, the first rotating shaft (7-4b) is in transmission connection with the moving contact (11-1b); the axis directions of the second rotating shaft (7-2b), the first rotating shaft (7-4b), the third connecting rod (7-5b) and the locking component (7-6b) are parallel to the direction d3, and the second rotating shaft (7-2b) is in transmission connection with the third connecting rod (7-5b) through the rear connecting rod (7-3b); the thermal tripping mechanism (9b) and the magnetic tripping mechanism (10b) are respectively in transmission cooperation with the locking component (7-6b). It is characterized in that: The thermal tripping mechanism (9b) and the magnetic tripping mechanism (10b) are arranged in sequence along the direction d1 and are arranged on the same side of the first rotating shaft structure (7r) in the direction d2; the direction d1, the direction d2 and the direction d3 are perpendicular to each other.

2. The circuit breaker according to claim 1, characterized in that: One end of the moving contact (11-1b) is inserted into the first rotating shaft (7-4b) and the moving contact (11-1b) is rotatably arranged relative to the first rotating shaft (7-4b); the first rotating shaft (7-4b) includes a first rotating shaft mounting groove (7-411b) provided thereon, and a moving contact jack (7-415b) for the moving contact (11-1b) to pass through is provided on the mounting groove side wall (7-416b) of the first rotating shaft mounting groove (7-411b), and the moving contact (11-1b) swings in the moving contact jack (7-415b) when rotating relative to the first rotating shaft (7-4b). The first rotating shaft structure (7r) further includes a protective plate (7-11b) arranged on the moving contact (11-1b) and moving synchronously therewith, and the protective plate (7-11b) always shields the moving contact jack (7-415b). The mounting groove side wall (7-416b) includes a protective plate mounting groove (7-412b) for the protective plate (7-11b) to be movably arranged therein, and the protective plate mounting groove (7-412b) is located on one side of the first rotating shaft mounting groove (7-411b) in the radial direction of the first rotating shaft (7-4b).

3. The circuit breaker according to claim 2, wherein: The protective plate (7-11b) is an arc-shaped plate, and a protective plate mounting hole (7-111b) for sleeving on the moving contact (11-1b) is provided in the middle thereof; the protective plate mounting groove (7-412b) is an arc-shaped groove.

4. The circuit breaker according to claim 1, characterized in that: The latch component (7-6b) includes a latch body (7-61b), a first mating arm (7-62b), and a second mating arm (7-63b). The latch component (7-6b) is rotatably arranged on the first rotating shaft (7-4b) through the latch body (7-61b). One end of the first mating arm (7-62b) and the second mating arm (7-63b) are respectively connected to the latch body (7-61b), and the other ends are respectively in driving cooperation with the thermal release mechanism (9b) and the magnetic release mechanism (10b).

5. The circuit breaker according to claim 4, wherein: The first mating arm (7-62b) and the second mating arm (7-63b) are radially arranged and are offset in the direction d3.

6. The operating system according to claim 5, characterized in that: The thermal release mechanism (9b) includes a bimetal component (9-123b) and a traction rod (9-5b). The traction rod (9-5b) is rotatably arranged and the axis direction of the rotating shaft is parallel to the direction d3. The traction rod (9-5b) includes a first traction rod arm (9-52b) and a second traction rod arm (9-53b). One end of the bimetal component (9-123b) is in driving cooperation with the first traction rod arm (9-52b), and the second traction rod arm (9-53b) is in driving cooperation with the first mating arm (7-62b).

7. The circuit breaker according to claim 5, wherein: The magnetic release mechanism (10b) includes an armature (10-1b) and a yoke (10-2b) used in cooperation. The armature (10-1b) is in driving cooperation with the second mating arm (7-63b).

8. The circuit breaker according to claim 7, characterized in that: The armature (10-1b) is movably arranged along the direction d1 and is oppositely arranged with the yoke (10-2b) along the direction d1.

9. The circuit breaker according to claim 2, wherein: The operating system further includes a contact spring (7-10b). The contact spring (7-10b) is arranged in the first rotating shaft installation groove (7-411b). The contact spring (7-10b) acts on the moving contact (11-1b) to limit the cooperation between the moving contact (11-1b) and the first rotating shaft (7-4b).

10. The circuit breaker according to claim 9, characterized in that: The contact spring (7-10b) is a torsion spring. The first rotating shaft (7-4b) includes a central column (7-414b) arranged in the first rotating shaft installation groove (7-411b). The torsion spring is sleeved on the central column (7-414b), and the two spring arms of the torsion spring are respectively in cooperation with the first rotating shaft (7-4b) and the moving contact (11-1b); The side wall (7-416b) of the installation groove is further provided with a moving contact activity groove (7-413b). One end of the moving contact (11-1b) passes through the moving contact jack (7-415b) and the first rotating shaft installation groove (7-411b) and is movably arranged in the moving contact activity groove (7-413b). The contact spring (7-10b) acts on the moving contact (11-1b) to limit the cooperation between the moving contact (11-1b) and the side wall of the moving contact activity groove (7-413b); The third connecting rod (7-5b) and the latch component (7-6b) are both arranged at one axial end of the first rotating shaft (7-4b), and the first rotating shaft installation groove (7-411b) is arranged at the other axial end of the first rotating shaft (7-4b); The rotation center of the moving contact (11-1b) relative to the first rotating shaft (7-4b) coincides with the rotation center of the first rotating shaft (7-4b); The operating system further includes a main reset member (7-8b), and the main reset member (7-8b) acts on the first rotating shaft (7-4b) to make it have a rotational tendency to drive the moving contact (11-1b) to move towards the open position; the first rotating shaft structure (7r) further includes a locking spring (7-7b), the locking member (7-6b) and the first rotating shaft (7-4b) are coaxially rotatably arranged, the locking spring (7-7b) is a torsion spring sleeved on the rotating shaft of the locking member (7-6b), and its two spring arms cooperate with the locking member (7-6b) and the first rotating shaft (7-4b) respectively.

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