breaker

Abstract

The present invention discloses a circuit breaker, wherein the circuit breaker comprises a driving assembly, the driving assembly is connected to the opening and closing mechanism through a transmission gear set, so as to drive the transmission gear set to rotate and switch between a first rotation position and a second rotation position, and drive the opening and closing mechanism to switch between a closing position or an opening position; a circuit board assembly, the circuit board assembly is electrically connected to the driving assembly; and a micro switch assembly, the micro switch assembly is arranged on the circuit board assembly, and is electrically connected to the circuit board assembly, and is used to detect a rotation position signal of the transmission gear set; when the circuit board assembly determines that the opening and closing mechanism is not in the corresponding closing position or opening position according to the detected rotation position signal, the driving assembly is controlled to drive the transmission gear set to continue to move, so that the opening and closing mechanism is in the corresponding closing position or opening position. The technical solution of the present invention effectively improves the safety of opening and closing of the circuit breaker.

Description

Technical Field

[0001] The invention relates to the technical field of electrical protection, and in particular to a circuit breaker. Background Art

[0002] At present, traditional low-voltage circuit breakers mainly rely on manually pulling the handle to achieve the opening and closing of the circuit breaker during the opening and closing operations. In order to ensure the reliability of the opening and closing of the circuit breaker, an indicator light is generally set to display the opening and closing status of the circuit breaker. However, there is a problem of low accuracy in displaying the opening and closing status of the circuit breaker by the indicator light. Therefore, operating the circuit breaker when it is impossible to determine whether the opening and closing status of the circuit breaker is reliable will pose a great safety hazard. Summary of the invention

[0003] The main purpose of the present invention is to provide a circuit breaker, aiming to improve the safety of opening and closing of the circuit breaker.

[0004] To achieve the above-mentioned object, the present invention provides a circuit breaker, which includes a housing and a first terminal, a second terminal, an opening and closing mechanism and a transmission gear set respectively arranged on the housing, wherein the opening and closing mechanism is electrically connected between the first terminal and the second terminal, and the opening and closing mechanism is used to switch between a closing position or an opening position to control the power supply between the first terminal and the second terminal to be connected or disconnected, and the circuit breaker also includes:

[0005] A drive assembly, the drive assembly is arranged in the housing and is drivingly connected to the opening and closing mechanism through the transmission gear set, the drive assembly is used to drive the transmission gear set to rotate and switch between a first rotation position and a second rotation position, so as to correspondingly drive the opening and closing mechanism to switch between the closing position or the opening position;

[0006] a circuit board assembly, the circuit board assembly being disposed in the housing and electrically connected to the driving assembly; and

[0007] A micro switch assembly, the micro switch assembly is arranged on the circuit board assembly and is electrically connected to the circuit board assembly, and is used to detect a rotation position signal of the transmission gear set;

[0008] The circuit board assembly is used to control the drive assembly to drive the transmission gear set to continue to move so that the opening and closing mechanism is in the corresponding closing position or opening position when it is determined based on the detected rotation position signal that the opening and closing mechanism is not in the corresponding closing position or opening position.

[0009] Optionally, the micro switch assembly includes a first micro switch and a second micro switch, the first micro switch is arranged on the circuit board assembly corresponding to the position of the transmission gear set in the first rotation position, and the second micro switch is arranged on the circuit board assembly corresponding to the position of the transmission gear set in the second rotation position;

[0010] The first micro switch is used to be triggered when the transmission gear set is in the first rotation position and output a first detection signal;

[0011] The second micro switch is used to be triggered when the transmission gear set is in the second rotation position and output a second detection signal;

[0012] The circuit board assembly is used to determine that the opening and closing mechanism is in the closed position when the first detection signal is received, and to determine that the opening and closing mechanism is in the open position when the second detection signal is received; and to determine that the opening and closing mechanism is not in the corresponding closed position or open position when the first detection signal and the second detection signal are not received.

[0013] Optionally, the transmission gear group includes a driving gear and a transmission gear meshing with the driving gear, the transmission gear is connected to the opening and closing mechanism in transmission, and the first microswitch and the second microswitch are arranged on the circuit board assembly at a position corresponding to the driving gear, or at a position corresponding to the transmission gear.

[0014] Optionally, the micro switch components are divided into two groups, one group of micro switch components is arranged on the circuit board assembly at a position corresponding to the driving gear, and the other group of micro switch components is arranged on the circuit board assembly at a position corresponding to the transmission gear.

[0015] Optionally, the first micro switch and the second micro switch have a detection portion, and a detection slot is provided on a side of the driving gear or the transmission gear facing the circuit board assembly;

[0016] When the first micro switch and the second micro switch are arranged at positions corresponding to the driving gear on the circuit board assembly, the driving gear is provided with a first detection slot, and when the transmission gear set is in the first rotation position, the detection portion of the first micro switch is located in the first detection slot, and the detection portion of the second micro switch is located outside the first detection slot; when the transmission gear set is in the second rotation position, the detection portion of the first micro switch is located outside the first detection slot, and the detection portion of the second micro switch is located in the first detection slot;

[0017] When the first micro switch and the second micro switch are arranged at positions corresponding to the transmission gear on the circuit board assembly, and the transmission gear is provided with a second detection slot, when the transmission gear set is in the first rotation position, the detection part of the first micro switch is located in the second detection slot, and the detection part of the second micro switch is located outside the second detection slot; when the transmission gear set is in the second rotation position, the detection part of the first micro switch is located outside the second detection slot, and the detection part of the second micro switch is located in the second detection slot.

[0018] Optionally, the first detection slot extends on the driving gear in a circumferential direction around the axis of the driving gear, so that when the transmission gear set is in the first rotation position, the detection portion of the first micro switch is located at one end slot of the first detection slot, and the detection portion of the second micro switch is located outside the first detection slot; when the transmission gear set is in the second rotation position, the detection portion of the first micro switch is located outside the first detection slot, and the detection portion of the second micro switch is located at the other end slot of the first detection slot; and / or,

[0019] The second detection slot extends circumferentially around the axis of the transmission gear on the transmission gear, so that when the transmission gear set is in the first rotation position, the detection part of the first micro switch is located at one end slot of the second detection slot, and the detection part of the second micro switch is located outside the second detection slot; when the transmission gear set is in the second rotation position, the detection part of the first micro switch is located outside the second detection slot, and the detection part of the second micro switch is located at the other end slot of the second detection slot.

[0020] Optionally, the notches on both sides of the first detection groove and the second detection groove are arranged to have a gradually decreasing slope from the notch to the groove bottom.

[0021] Optionally, the driving assembly includes a motor, the motor is electrically connected to the circuit board assembly, and the motor is drivingly connected to the transmission gear to drive the transmission gear to rotate.

[0022] Optionally, the driving assembly further includes a reduction gear set, the output shaft of the motor forms a worm, the reduction gear set is arranged between the transmission gear and the worm, and meshes with the transmission gear and the worm respectively.

[0023] Optionally, the reduction gear set includes a first reduction gear and a second reduction gear, the first reduction gear includes a coaxially arranged worm gear and a spur gear, the worm gear meshes with the worm of the motor, the spur gear meshes with the second reduction gear, and the second reduction gear meshes with the transmission gear.

[0024] A driving assembly, a transmission gear set, an opening and closing mechanism, a circuit board assembly and a micro switch assembly are arranged in a shell of the technical solution of the present invention. The driving assembly is connected to the opening and closing mechanism through the transmission gear set to drive the transmission gear set to switch between a first rotation position and a second rotation position, and then the transmission gear set drives the opening and closing mechanism to switch between a corresponding closing position or an opening position, thereby realizing the opening and closing of the circuit breaker. A circuit board assembly electrically connected to the driving assembly is arranged in the shell, and a micro switch assembly for detecting a rotation position signal of the transmission gear set is arranged on the circuit board assembly, wherein the circuit board assembly can determine whether the opening and closing mechanism is in a corresponding closing position or an opening position according to the rotation position signal detected by the micro switch assembly. When the opening and closing mechanism is not in the corresponding closing position or an opening position, the circuit board assembly generates a control signal and transmits it to the driving assembly, so that the driving assembly drives the transmission gear set to continue rotating according to the control signal, so that the opening and closing mechanism is in the corresponding closing position and an opening position. Compared with the prior art, the technical solution effectively improves the reliability of the opening and closing action of the circuit breaker, thereby improving the safety of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 1 It is a schematic structural diagram of an embodiment of a circuit breaker of the present invention;

[0027] Figure 2 for Figure 1 An internal structure schematic diagram of an embodiment at an angle;

[0028] Figure 3 for Figure 1 A schematic diagram of the internal structure of the embodiment from another angle.

[0029] Description of Figure Numbers:

[0030]

[0031]

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention proposes a circuit breaker, which includes a housing 10 and a first terminal 13, a second terminal 114, an opening and closing mechanism 15 and a transmission gear 40 group respectively arranged on the housing 10, wherein the opening and closing mechanism 15 is electrically connected between the first terminal 13 and the second terminal 114, and the opening and closing mechanism 15 is used to switch between a closing position or an opening position to control the power supply between the first terminal 13 and the second terminal 114 to be connected or disconnected.

[0037] In the embodiment of the present invention, Figures 1 to 3 As shown, the circuit breaker comprises:

[0038] A driving assembly, the driving assembly is arranged in the housing 10 and is drivingly connected to the opening and closing mechanism 15 through the transmission gear 40 group, and the driving assembly is used to drive the transmission gear 40 group to rotate and switch between a first rotation position and a second rotation position, so as to correspondingly drive the opening and closing mechanism 15 to switch between the closing position or the opening position;

[0039] A circuit board assembly 60, wherein the circuit board assembly 60 is disposed in the housing 10 and is electrically connected to the driving assembly; and

[0040] A micro switch assembly, the micro switch assembly is disposed on the circuit board assembly 60 and is electrically connected to the circuit board assembly 60, and is used to detect a rotation position signal of the transmission gear 40 group;

[0041] The circuit board assembly 60 is used to control the driving assembly to drive the transmission gear 40 group to continue to move when it is determined that the opening and closing mechanism 15 is not in the corresponding closing position or opening position based on the detected rotation position signal, so that the opening and closing mechanism 15 is in the corresponding closing position or opening position.

[0042] In this embodiment, the shell 10 is a protective shell of the circuit breaker, which is used to protect other components of the circuit breaker and provide installation space for other components of the circuit breaker. The first terminal 13 and the second terminal 114 are ports for connecting the circuit breaker to external lines. The opening and closing mechanism 15 is used to perform closing or opening actions to control the connection or disconnection of power between the first terminal 13 and the second terminal 114. Among them, the connection line of the first terminal 13, the opening and closing mechanism 15 and the second terminal 114 is the main circuit. Of course, when new lines, components or elements are connected in series on the connection line of the first terminal 13, the opening and closing mechanism 15 and the second terminal 114, they also constitute a part of the main circuit. The transmission gear 40 group is used to be connected to the opening and closing mechanism 15 in transmission to drive the opening and closing mechanism 15 to perform closing or opening actions.

[0043] The driving assembly is connected to the transmission gear 40 group to drive the transmission gear 40 group to rotate, thereby driving the opening and closing mechanism 15 to switch between the closing position and the opening position. The driving assembly includes a driving member, which can be a motor 20 or a cylinder, and is not limited here. Among them, the transmission gear 40 group has a first rotation position corresponding to the closing position and a second rotation position corresponding to the opening position during the rotation process. It can be understood that the transmission gear 40 group is in the first rotation position, the opening and closing mechanism 15 is in the closing position, and the circuit breaker is in the closing state. The transmission gear 40 group is in the second rotation position, the opening and closing mechanism 15 is in the opening position, and the circuit breaker is in the opening state. It needs to be explained that the transmission gear 40 group can be repeatedly rotated and switched between the first rotation position and the second rotation position.

[0044] The circuit board assembly 60 is disposed in the housing 10 for mounting electrical components and generating electrical signals. The circuit board assembly 60 is electrically connected to the driving assembly to control the driving assembly to drive the transmission gear 40 to rotate, thereby driving the opening and closing mechanism 15 to perform closing or opening actions.

[0045] The micro switch assembly is a detection device for the circuit breaker, one side of which is fixed on the circuit board assembly 60, and the other side faces the transmission gear 40 group, for detecting the rotation position signal of the transmission gear 40 group, and is electrically connected to the circuit board assembly 60 to transmit the rotation position signal to the circuit board assembly 60. The circuit board assembly 60 can determine whether the opening and closing mechanism 15 is in the corresponding closing position or opening position according to the rotation position signal detected by the micro switch assembly. When the opening and closing mechanism 15 is not in the corresponding closing position or opening position, the circuit board assembly 60 generates a control signal and transmits it to the drive assembly. The drive assembly drives the transmission gear 40 group to continue rotating according to the control signal to drive the opening and closing mechanism 15 to be in the corresponding closing position or opening position.

[0046] The housing 10 of the technical solution of the present invention is provided with a driving assembly, a transmission gear 40 group, an opening and closing mechanism 15, a circuit board assembly 60 and a micro switch assembly. The driving assembly is connected to the opening and closing mechanism 15 through the transmission gear 40 group to drive the transmission gear 40 group to switch between the first rotation position and the second rotation position, and then the transmission gear 40 group drives the opening and closing mechanism 15 to switch between the corresponding closing position or opening position, thereby realizing the opening and closing of the circuit breaker. By arranging a circuit board assembly 60 electrically connected to the driving assembly in the housing 10, and arranging a circuit board assembly 60 for detecting the rotation of the transmission gear 40 group The micro switch assembly of the invention can detect the rotation position signal of the micro switch assembly, wherein the circuit board assembly 60 can determine whether the opening and closing mechanism 15 is in the corresponding closing position or opening position according to the rotation position signal detected by the micro switch assembly. When the opening and closing mechanism 15 is not in the corresponding closing position or opening position, the circuit board assembly 60 generates a control signal and transmits it to the driving assembly, so that the driving assembly drives the transmission gear 40 group to continue rotating according to the control signal, so that the opening and closing mechanism 15 is in the corresponding closing position and opening position. Compared with the prior art, the technical solution effectively improves the reliability of the opening and closing action of the circuit breaker, thereby improving the safety of the circuit breaker.

[0047] Furthermore, if Figures 1 to 3 As shown, the micro switch assembly includes a first micro switch 51 and a second micro switch 52, the first micro switch 51 is arranged on the circuit board assembly 60 corresponding to the position of the transmission gear 40 group in the first rotation position, and the second micro switch 52 is arranged on the circuit board assembly 60 corresponding to the position of the transmission gear 40 group in the second rotation position;

[0048] The first micro switch 51 is used to be triggered when the transmission gear 40 is in the first rotation position and output a first detection signal;

[0049] The second micro switch 52 is used to be triggered when the transmission gear 40 is in the second rotation position and output a second detection signal;

[0050] The circuit board assembly 60 is used to determine that the opening and closing mechanism 15 is in the closed position when the first detection signal is received, and to determine that the opening and closing mechanism 15 is in the open position when the second detection signal is received; when the first detection signal and the second detection signal are not received, determine that the opening and closing mechanism 15 is not in the corresponding closed position or open position.

[0051] In this embodiment, the microswitch assembly includes two microswitches, namely a first microswitch 51 and a second microswitch 52. The first microswitch 51 is used to detect a position signal of the transmission gear 40 group being in a first rotation position, and the second microswitch 52 is used to detect a position signal of the transmission gear 40 group being in a second rotation position. When the transmission gear 40 group is in the first rotation position, the first microswitch 51 is triggered to output a first detection signal, and when the transmission gear 40 group is in the second rotation position, the second microswitch 52 is triggered to output a second detection signal. The circuit board assembly 60 can determine whether the opening and closing mechanism 15 is in the closing position or the opening position through the received first detection signal or the second detection signal. When the circuit board assembly 60 does not receive the first detection signal or the second detection signal, it can be determined that the opening and closing mechanism 15 is not in the corresponding closing position or the opening position, and then a control signal is generated and transmitted to the drive assembly. The drive assembly then drives the transmission gear 40 group to continue rotating to drive the opening and closing mechanism 15 to be in the corresponding closing position or the opening position, thereby effectively improving the safety of the circuit breaker.

[0052] Furthermore, if Figures 1 to 3 As shown, the transmission gear 40 group includes a driving gear 30 and a transmission gear 40 meshing with the driving gear 30, the transmission gear 40 is transmission-connected to the opening and closing mechanism 15, and the first micro switch 51 and the second micro switch 52 are arranged on the circuit board assembly 60 corresponding to the position of the driving gear 30, or corresponding to the position of the transmission gear 40. In this embodiment, the circuit breaker also includes a lever assembly 12, and a mounting groove 11 is opened on the outer wall of the shell 10. The lever assembly 12 is arranged in the mounting groove 11 and protrudes from the outer wall of the shell 10. It is a component for the user to manually operate the circuit breaker to open and close. The driving gear 30 is arranged on the lever assembly 12 and meshes with the transmission gear 40 to drive the transmission gear 40 to rotate when the user toggles the lever assembly 12, wherein the transmission gear 40 is connected to the opening and closing mechanism 15 in transmission connection, so the transmission gear 40 can drive the opening and closing mechanism 15 to switch between the closing position or the opening position. It should be explained that the driving gear 30 and the transmission gear 40 both have a first rotation position or a second rotation position corresponding to the closing position or the opening position of the opening and closing mechanism 15 during the rotation process, so the first micro switch 51 and the second micro switch 52 can be set on the circuit board assembly 60 corresponding to the position of detecting the driving gear 30, and can also be set corresponding to the position of detecting the transmission gear 40, and no specific limitation is made here.

[0053] Furthermore, if Figures 1 to 3 As shown, the micro switch assembly is divided into two groups, one group of the micro switch assembly is arranged on the circuit board assembly 60 at a position corresponding to the driving gear 30, and the other group of the micro switch assembly is arranged on the circuit board assembly 60 at a position corresponding to the transmission gear 40. In this embodiment, a group of micro switch assemblies includes a first micro switch 51 and a second micro switch 52. Here, one group of micro switch assemblies is arranged on the circuit board assembly 60 at a position corresponding to the driving gear 30 to detect the position signal of the driving gear 30 at the first rotation position and the second rotation position, and the other group of micro switch assemblies is arranged on the circuit board assembly 60 at a position corresponding to the transmission gear 40 to detect the position signal of the transmission gear 40 at the first rotation position and the second rotation position. By arranging two groups of micro switch assemblies, the accuracy of the detection result of the micro switch assembly can be effectively improved, thereby further improving the safety of the circuit breaker. It should be explained that in the present embodiment, the circuit board assembly 60 can determine the position of the opening and closing mechanism 15 based on the detection results of one group of micro switch assemblies, and can also determine the position of the opening and closing mechanism 15 based on the detection results of two groups of micro switch assemblies. It is preferred to determine the position of the opening and closing mechanism 15 based on the detection results of two groups of micro switch assemblies, so that the detection results can be more accurate.

[0054] Furthermore, if Figures 1 to 3 As shown, the first micro switch 51 and the second micro switch 52 have a detection portion 53, and a detection slot is provided on a side of the driving gear 30 or the transmission gear 40 facing the circuit board assembly 60;

[0055] When the first micro switch 51 and the second micro switch 52 are arranged at positions corresponding to the driving gear 30 on the circuit board assembly 60, the driving gear 30 is provided with a first detection slot 31, and when the transmission gear 40 group is in the first rotation position, the detection portion 53 of the first micro switch 51 is located in the first detection slot 31, and the detection portion 53 of the second micro switch 52 is located outside the first detection slot 31; when the transmission gear 40 group is in the second rotation position, the detection portion 53 of the first micro switch 51 is located outside the first detection slot 31, and the detection portion 53 of the second micro switch 52 is located in the first detection slot 31;

[0056] When the first micro switch 51 and the second micro switch 52 are arranged on the circuit board assembly 60 at positions corresponding to the transmission gear 40, the transmission gear 40 is provided with a second detection slot 41, and when the transmission gear 40 group is in the first rotation position, the detection portion 53 of the first micro switch 51 is located in the second detection slot 41, and the detection portion 53 of the second micro switch 52 is located outside the second detection slot 41; when the transmission gear 40 group is in the second rotation position, the detection portion 53 of the first micro switch 51 is located outside the second detection slot 41, and the detection portion 53 of the second micro switch 52 is located in the second detection slot 41.

[0057] In this embodiment, the detection method of the micro switch assembly is that one side of the micro switch is convexly provided with an automatically rotating detection portion 53, and the driving gear 30 or the transmission gear 40 is provided with a detection groove that cooperates with the detection portion 53. As mentioned above, the driving gear 30 and the transmission gear 40 have a first rotation position or a second rotation position corresponding to the closing position or the opening position of the opening and closing mechanism 15 on their rotation trajectories. When the first micro switch 51 and the second micro switch 52 are arranged at the position corresponding to the driving gear 30 on the circuit board assembly 60, the driving gear 30 is provided with a first detection groove 31, and the driving gear 30 is provided with a first detection groove 32. 0 is in the first rotation position, the detection portion 53 of the first micro switch 51 is located in the first detection slot 31 and outputs a first detection signal, and the detection portion 53 of the second micro switch 52 abuts against the outer wall of the driving gear 30; and when the driving gear 30 rotates toward the second rotation position, the detection portion 53 of the first micro switch 51 is pushed by the notch of the first detection slot 31 and then lifted up to abut against the outer wall of the driving gear 30. When the driving gear 30 rotates to the second rotation position, the detection portion 53 of the second micro switch 52 rotates and extends into the first detection slot 31, and outputs a second detection signal at the same time.

[0058] When the first micro switch 51 and the second micro switch 52 are arranged at positions corresponding to the transmission gear 40 on the circuit board assembly 60, the transmission gear 40 is provided with a second detection slot 41. When the transmission gear 40 is in the first rotation position, the detection portion 53 of the first micro switch 51 is located in the second detection slot 41 and outputs a first detection signal, and the detection portion 53 of the second micro switch 52 abuts against the outer wall of the transmission gear 40; and when the transmission gear 40 rotates toward the second rotation position, the detection portion 53 of the first micro switch 51 is pushed by the notch of the second detection slot 41, and then lifted up to abut against the outer wall of the transmission gear 40. When the transmission gear 40 rotates to the second rotation position, the detection portion 53 of the second micro switch 52 rotates and extends into the second detection slot 41, and outputs a second detection signal at the same time.

[0059] The circuit board assembly 60 can determine whether the opening and closing mechanism 15 is in the corresponding closing position or opening position through the above-mentioned first detection signal and the second detection signal. If the opening and closing mechanism 15 is not in the corresponding closing position or opening position, the circuit board assembly 60 generates a control signal to the driving assembly, and the driving assembly drives the transmission gear 40 to continue rotating according to the control signal to drive the opening and closing mechanism 15 to be in the corresponding closing position or opening position.

[0060] Furthermore, if Figures 1 to 3 As shown, the first detection slot 31 extends circumferentially around the axis of the driving gear 30 on the driving gear 30, so that when the transmission gear 40 group is in the first rotation position, the detection portion 53 of the first micro switch 51 is located at one end slot of the first detection slot 31, and the detection portion 53 of the second micro switch 52 is located outside the first detection slot 31; when the transmission gear 40 group is in the second rotation position, the detection portion 53 of the first micro switch 51 is located outside the first detection slot 31, and the detection portion 53 of the second micro switch 52 is located at the other end slot of the first detection slot 31.

[0061] In the present embodiment, there can be multiple first detection slots 31. When the driving gear 30 is in the first rotation position, the detection portion 53 of the first micro switch 51 is located in one first detection slot 31 and outputs a first detection signal. The detection portion 53 of the second micro switch 52 abuts against the outer wall of the driving gear 30. When the driving gear 30 rotates to the second rotation position, the detection portion 53 of the first micro switch 51 abuts against the outer wall of the driving gear 30, and the detection portion 53 of the second micro switch 52 is located in another first detection slot 31 and outputs a second detection signal. The first detection slot 31 can also be one, which extends circumferentially around the axis of the driving gear 30 on the driving gear 30. It can be understood that when the driving gear 30 is in the first rotation position, the detection portion 53 of the first micro switch 51 abuts against the outer wall of the driving gear 30, and the detection portion 53 of the second micro switch 52 is located in another first detection slot 31 and outputs a second detection signal. When the driving gear 30 is in the second rotation position, the detection portion 53 of the first microswitch 51 is located in the first detection groove 31 and abuts against the notch at one end of the first detection groove 31. When the driving gear 30 rotates toward the second rotation position, the notch of the first detection groove 31 pushes the detection portion 53 of the first microswitch 51 to be lifted and abut against the outer wall of the driving gear 30. When the driving gear 30 rotates to the second rotation position, the detection portion 53 of the second microswitch 52 is located in the first detection groove 31 and abuts against the notch at the other end of the first detection groove 31. Compared with the first detection groove 31 being set to multiple, the first detection groove 31 is set to one, and the circumferential extension setting around the axis of the driving gear 30 on the driving gear 30 can effectively reduce the production difficulty of the driving gear 30.

[0062] Further, the second detection slot 41 extends circumferentially on the transmission gear 40 around the axis of the transmission gear 40, so that when the transmission gear 40 group is in the first rotation position, the detection portion 53 of the first micro switch 51 is located at one end slot of the second detection slot 41, and the detection portion 53 of the second micro switch 52 is located outside the second detection slot 41; when the transmission gear 40 group is in the second rotation position, the detection portion 53 of the first micro switch 51 is located outside the second detection slot 41, and the detection portion 53 of the second micro switch 52 is located at the other end slot of the second detection slot 41.

[0063] In this embodiment, there can be multiple second detection slots 41. When the transmission gear 40 is in the first rotation position, the detection portion 53 of the first microswitch 51 is located in a second detection slot 41 and outputs a first detection signal. The detection portion 53 of the second microswitch 52 abuts against the outer wall of the transmission gear 40. When the transmission gear 40 rotates to the second rotation position, the detection portion 53 of the first microswitch 51 abuts against the outer wall of the transmission gear 40, and the detection portion 53 of the second microswitch 52 is located in another second detection slot 41 and outputs a second detection signal. The second detection slot 41 can also be one, which extends circumferentially around the axis of the transmission gear 40 on the transmission gear 40. It can be understood that when the transmission gear 40 is in the first rotation position When the transmission gear 40 is in the moving position, the detection part 53 of the first microswitch 51 is located in the second detection groove 41 and abuts against the notch at one end of the second detection groove 41. When the transmission gear 40 rotates toward the second rotation position, the notch of the second detection groove 41 pushes the detection part 53 of the first microswitch 51 to be lifted up and abut against the outer wall of the transmission gear 40. When the transmission gear 40 rotates to the second rotation position, the detection part 53 of the second microswitch 52 is located in the second detection groove 41 and abuts against the notch at the other end of the second detection groove 41. Compared with the second detection groove 41 being set as multiple, the second detection groove 41 is set as one, and the circumferential extension setting on the transmission gear 40 around the axis of the transmission gear 40 can effectively reduce the production difficulty of the transmission gear 40.

[0064] Furthermore, if Figures 1 to 3 As shown, the notches on both sides of the first detection slot 31 and the second detection slot 41 are arranged with a gradually narrowing slope from the notch to the slot bottom. In this embodiment, the notches on both sides of the first detection slot 31 and the second detection slot 41 refer to the notch portions that abut against the detection parts 53 of the first micro switch 51 and the second micro switch 52, respectively, wherein the notch portions to the slot bottom are arranged with a slope, which can slow down the rotation speed of the detection parts 53 of the first micro switch 51 and the second micro switch 52 from the outside of the detection slot to the inside of the detection slot, thereby preventing the detection parts 53 from rotating too fast and being damaged, thereby improving the practicality of the circuit breaker.

[0065] Furthermore, if Figures 1 to 3As shown, the driving assembly includes a motor 20, the motor 20 is electrically connected to the circuit board assembly 60, and the motor 20 is drivingly connected to the transmission gear 40 to drive the transmission gear 40 to rotate. In this embodiment, the driving member of the driving assembly is the motor 20, the motor 20 is electrically connected to the circuit board assembly 60, and is drivingly connected to the transmission gear 40, so that the circuit board assembly 60 controls the motor 20 to drive the transmission gear 40 to rotate, and then the transmission gear 40 drives the opening and closing mechanism 15 to switch between the closing position or the opening position, so as to realize the automatic opening and closing of the circuit breaker.

[0066] Furthermore, if Figures 1 to 3 As shown, the driving assembly further includes a reduction gear set, the output shaft of the motor 20 forms a worm 21, and the reduction gear set is disposed between the transmission gear 40 and the worm 21, and meshes with the transmission gear 40 and the worm 21 respectively. In this embodiment, since the rotation speed of the motor 20 is very fast, if the motor 20 is directly driven and connected with the transmission gear 40, the rotation speed of the transmission gear 40 will also be too fast, thereby affecting the service life of the transmission gear 40. Therefore, in this embodiment, a reduction gear set is disposed between the motor 20 and the transmission gear 40 to slow down the rotation speed of the transmission gear 40, wherein the output shaft of the motor 20 forms a worm 21, which can improve the stability of the mutual rotation between the output shaft of the motor 20 and the reduction gear set.

[0067] Further, the reduction gear group includes a first reduction gear 22 and a second reduction gear 25, the first reduction gear 22 includes a coaxially arranged worm gear 23 and a spur gear 24, the worm gear 23 is meshed with the worm 21 of the motor 20, the spur gear 24 is meshed with the second reduction gear 25, and the second reduction gear 25 is meshed with the transmission gear 40. In this embodiment, the first reduction gear 22 is a coaxially arranged worm wheel 23 and a spur gear 24. The worm wheel 23 and the spur gear 24 are integrally formed, and the number of teeth of the worm wheel 23 is greater than the number of teeth of the spur gear 24. The engagement of the worm wheel 23 with the worm 21 of the motor 20 can effectively improve the stability of the power transmission between the motor 20 and the reduction gear group. At the same time, the spur gear 24 is engaged with the second reduction gear 25, and the number of teeth of the spur gear 24 is less than the number of teeth of the second reduction gear 25. It can be understood that the transmission ratio between the worm 21 and the transmission gear 40 is relatively large, and thus the worm 21 rotates one circle, and the transmission gear 40 rotates half a circle or less than half a circle. Therefore, the technical solution of this embodiment can effectively slow down the rotation speed of the transmission gear 40, thereby improving the stability of the drive assembly driving the transmission gear 40 to rotate.

[0068] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A circuit breaker, comprising a housing and a first terminal, a second terminal, an opening and closing mechanism and a transmission gear set respectively arranged on the housing, wherein the opening and closing mechanism is electrically connected between the first terminal and the second terminal, and the opening and closing mechanism is used to switch between a closing position or an opening position to control the power supply between the first terminal and the second terminal to be connected or disconnected, characterized in that: The circuit breaker comprises: A drive assembly, the drive assembly is arranged in the housing and is drivingly connected to the opening and closing mechanism through the transmission gear set, the drive assembly is used to drive the transmission gear set to rotate and switch between a first rotation position and a second rotation position, so as to correspondingly drive the opening and closing mechanism to switch between the closing position or the opening position; a circuit board assembly, the circuit board assembly being disposed in the housing and electrically connected to the driving assembly; and a micro switch assembly, the micro switch assembly being arranged on the circuit board assembly and being electrically connected to the circuit board assembly, and being used for detecting a rotation position signal of the transmission gear set; the micro switch assembly comprising a first micro switch and a second micro switch, the first micro switch being arranged on the circuit board assembly corresponding to the position of the transmission gear set being in the first rotation position, and being used for triggering when the transmission gear set is in the first rotation position, and outputting a first detection signal; the second micro switch being arranged on the circuit board assembly corresponding to the position of the transmission gear set being in the second rotation position, and being used for triggering when the transmission gear set is in the second rotation position, and outputting a second detection signal; The circuit board assembly is used to control the drive assembly to drive the transmission gear set to continue to move when it is determined that the opening and closing mechanism is not in the corresponding closing position or opening position according to the detected rotation position signal, so that the opening and closing mechanism is in the corresponding closing position or opening position; the circuit board assembly is used to determine that the opening and closing mechanism is in the closing position when the first detection signal is received, and to determine that the opening and closing mechanism is in the opening position when the second detection signal is received, and to determine that the opening and closing mechanism is not in the corresponding closing position or opening position when the first detection signal and the second detection signal are not received; The transmission gear set includes a driving gear and a transmission gear meshing with the driving gear, the transmission gear is in transmission connection with the opening and closing mechanism, and the first micro switch and the second micro switch are arranged on the circuit board assembly at a position corresponding to the driving gear, or at a position corresponding to the transmission gear; The micro switch assembly comprises two groups, one group of micro switch assemblies is arranged on the circuit board assembly at a position corresponding to the driving gear, and the other group of micro switch assemblies is arranged on the circuit board assembly at a position corresponding to the transmission gear; the first micro switch and the second micro switch have a detection portion, and a detection groove is provided on a side of the driving gear or the transmission gear facing the circuit board assembly; When the first micro switch and the second micro switch are arranged at positions corresponding to the driving gear on the circuit board assembly, the driving gear is provided with a first detection slot, and when the transmission gear set is in the first rotation position, the detection portion of the first micro switch is located in the first detection slot, and the detection portion of the second micro switch is located outside the first detection slot; when the transmission gear set is in the second rotation position, the detection portion of the first micro switch is located outside the first detection slot, and the detection portion of the second micro switch is located in the first detection slot; When the first micro switch and the second micro switch are arranged at positions corresponding to the transmission gear on the circuit board assembly, and the transmission gear is provided with a second detection slot, when the transmission gear set is in the first rotation position, the detection part of the first micro switch is located in the second detection slot, and the detection part of the second micro switch is located outside the second detection slot; when the transmission gear set is in the second rotation position, the detection part of the first micro switch is located outside the second detection slot, and the detection part of the second micro switch is located in the second detection slot.

2. The circuit breaker according to claim 1, characterized in that The first detection slot extends on the driving gear in the circumferential direction around the axis of the driving gear, so that when the transmission gear set is in the first rotation position, the detection portion of the first micro switch is located at one end slot of the first detection slot, and the detection portion of the second micro switch is located outside the first detection slot; when the transmission gear set is in the second rotation position, the detection portion of the first micro switch is located outside the first detection slot, and the detection portion of the second micro switch is located at the other end slot of the first detection slot; and / or, The second detection slot extends circumferentially around the axis of the transmission gear on the transmission gear, so that when the transmission gear set is in the first rotation position, the detection part of the first micro switch is located at one end slot of the second detection slot, and the detection part of the second micro switch is located outside the second detection slot; when the transmission gear set is in the second rotation position, the detection part of the first micro switch is located outside the second detection slot, and the detection part of the second micro switch is located at the other end slot of the second detection slot.

3. The circuit breaker according to claim 1, characterized in that: The notches on both sides of the first detection groove and the second detection groove are arranged in a slope that gradually decreases from the notch opening to the groove bottom.

4. The circuit breaker according to claim 1, characterized in that The driving assembly includes a motor, the motor is electrically connected to the circuit board assembly, and the motor is drivingly connected to the transmission gear to drive the transmission gear to rotate.

5. The circuit breaker according to claim 4, characterized in that The driving assembly further comprises a reduction gear set, the output shaft of the motor forms a worm, the reduction gear set is arranged between the transmission gear and the worm, and is meshed with the transmission gear and the worm respectively.

6. The circuit breaker according to claim 5, characterized in that The reduction gear set includes a first reduction gear and a second reduction gear, the first reduction gear includes a coaxially arranged worm gear and a spur gear, the worm gear meshes with the worm of the motor, the spur gear meshes with the second reduction gear, and the second reduction gear meshes with the transmission gear.

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