Indicator mechanism of molded case circuit breaker

Abstract

The utility model discloses an indicating piece mechanism of a molded case circuit breaker, which comprises a shell, an electric operating mechanism arranged in the shell, and microswitches and a circuit board which are arranged in the shell, the electric operating mechanism comprises a rotating block which is rotationally arranged, and the indicating piece mechanism is characterized in that the two microswitches are arranged at an interval, a swing rod is rotationally arranged in the shell, and the circuit board is arranged on the swing rod. The swing rod comprises a rotating part arranged in the middle, an abutting section which is arranged on one side of the rotating part and abuts against the rotating block, and an abutting section which is arranged on the other side of the rotating part and can abut against the two microswitches respectively. The swing rod is rotationally arranged on the shell through the rotating part. According to the utility model, the swing rod linked with the electric operating mechanism is arranged, so that when the electric operating mechanism is in different operating states, the swing rod swings adaptively, and a closing state, a free tripping state and a re-tripping state can be fed back to the circuit board by changing the position states of the swing rod and the two microswitches.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, and more particularly to an indicator mechanism of a molded case circuit breaker. Background Art

[0002] Existing molded case circuit breakers with energy storage electric operating mechanisms typically have free tripping, re-tripping, and closing states. These mechanisms typically operate in two modes: manual and automatic, and these modes can be switched between to operate the associated circuit breaker. Energy storage involves storing electrical energy in a compressed spring via a motor and a reduction mechanism. When needed, this stored energy is instantly released to push the circuit breaker handle, closing the molded case circuit breaker. In the manual mode, operating the manual operating mechanism causes the energy storage mechanism to store energy, completing the re-tripping operation of the associated circuit breaker and preparing for the next closing step. In the automatic mode, an electrical signal is sent to the electric operator, and the motor, through multi-stage transmission gears, stores energy in the energy storage mechanism, simultaneously completing the re-tripping operation of the associated circuit breaker and preparing for the next closing step. The manual state is suitable for local operation, and is used when the operator needs to close or open the circuit breaker on site. The automatic state is suitable for remote operation, and the operator operates the electric operating mechanism remotely through communication control to achieve closing and opening operations of the circuit breaker.

[0003] When performing remote electric operation, the current state of the circuit breaker needs to be detected. This is usually achieved through a micro switch and a circuit board installed in the molded case circuit breaker. The micro switch feeds back the current state signal of the molded case circuit breaker to the circuit board, so that the remote operation control of the electric operating mechanism can be carried out. The indicator mechanism including the micro switch needs to provide the circuit board with the corresponding signal status feedback. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and has a reasonable structural design. By arranging a rocker arm linked with the electric operating mechanism, the rocker arm will swing accordingly when the electric operating mechanism is in different operating states. By changing the position states of the rocker arm and the two micro switches, the closing state, free tripping state and re-tripping state can be fed back to the circuit board.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The invention relates to an indicator mechanism of a molded case circuit breaker, comprising a housing, an electric operating mechanism arranged in the housing, and a micro switch and a circuit board arranged in the housing. The electric operating mechanism comprises a rotating block arranged for rotation, two micro switches arranged at intervals, and a rocker arm arranged for rotation in the housing. The rocker arm comprises a rotating portion arranged in the middle, an abutting section arranged on one side of the rotating portion and abutting against the rotating block, and an abutting section arranged on the other side of the rotating portion and capable of abutting against two micro switches respectively. The rocker arm is rotatably arranged in the housing through the rotating portion, so that when the electric operating mechanism is operated and the rotating block is driven to rotate, the rotating block is pressed against the abutting section and drives the rocker arm to swing. When the abutting section abuts against one of the micro switches, the micro switch feeds back a free tripping state signal to the circuit board; when the abutting section abuts against the other micro switch, the micro switch feeds back a closing state signal to the circuit board; when the abutting section is between the two micro switches and does not abut against either of the two micro switches, the micro switch feeds back a re-decoupling state signal to the circuit board.

[0007] By adopting the above technical solution and setting a rocker arm linked to the electric operating mechanism, when the electric operating mechanism is in different operating states, the rocker arm will swing accordingly. By changing the position state of the rocker arm and the two micro switches, the closing state, free tripping state and re-tripping state can be fed back to the circuit board.

[0008] Preferably, the rotating part includes an arc-shaped rotating body and a rotating shaft arranged on both sides of the arc-shaped rotating body, and the abutting section and the contact section are fixed or integrally arranged on the arc-shaped rotating body; the rocker arm is passed through the shell, and a receiving groove that is adapted to the rotating part and used to accommodate the rotating part is provided on the shell, and rotating grooves that are adapted to the rotating shaft are provided on both sides of the receiving groove; a fixed cover plate is provided at a position corresponding to the receiving groove on the casing, and the fixed cover plate covers and blocks the rotating groove.

[0009] By adopting the above technical solution, the rotating part is arranged as a whole in the receiving groove, so that the rocker arm can swing relative to the shell when it is pressed by the rotating block, wherein the rotating shafts on both sides will be located in the rotating grooves on both sides of the receiving groove, and the rotating shafts are positioned in the rotating grooves by a fixed cover plate fixedly installed on the shell, so that the rotating shafts can only rotate in the rotating grooves, that is, the rotating part rotates in the receiving groove without causing the rotating groove to be separated from the receiving groove, thereby ensuring the rotation stability of the rotating part. Specifically, the fixed cover plate is fixed to the shell by screws, which can facilitate the subsequent lubrication and maintenance of the rotating part or the easy maintenance of the rocker arm. The rotating part can be provided with a torsion spring to provide a rotational restoring force for the rotating part, and the setting of the fixed cover plate can also play a role in pressing and fixing the torsion spring.

[0010] Preferably, the abutting section is arranged in an L-shape, an abutting end surface abutting against the rotating block is provided on the abutting section, and a pressing surface corresponding to the abutting end surface is provided on the rotating block.

[0011] By adopting the above technical solution, the rocker arm can be driven to swing by the pressing surface pressing the abutting end surface. The abutting end surface can be matched with the pressing surface in an inclined plane. Combined with the L-shaped abutting section, the abutting section can accurately swing between the two micro switches.

[0012] Preferably, the end of the contact section away from the rotating part is set as a contact end, and the contact end extends out of the accommodating groove. A contact surface that can abut against two micro switches is provided on the contact end. The two micro switches are respectively a first micro switch away from the contact surface and a second micro switch close to the contact surface. The front of the contact surface can abut against the first micro switch, and the side of the contact surface can abut against the second micro switch. When the first micro switch is abutted, the circuit board receives a free tripping state signal; when the second micro switch is abutted, the circuit board receives a closing state signal.

[0013] By adopting the above technical solution, the front of the contact surface contacts the first micro switch, while the side of the contact surface contacts the second micro switch. The structural design is reasonable, and the contact between the two micro switches can be achieved through the contact surfaces in different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the housing according to a specific embodiment of the present invention. Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the structure of the housing according to a specific embodiment of the present invention. Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the structure of the housing according to a specific embodiment of the present invention. Figure 3 ;

[0018] Figure 5 This is a schematic diagram of the structure of the swing rod in the specific embodiment of the utility model. Figure 1 ;

[0019] Figure 6 This is a schematic diagram of the structure of the swing rod in the specific embodiment of the utility model. Figure 2 ;

[0020] Figure 7 This is a structural diagram of a specific embodiment of the utility model in a free tripping state;

[0021] Figure 8 This is a structural diagram of a specific embodiment of the utility model in a re-fastening state;

[0022] Figure 9It is a structural schematic diagram of a specific embodiment of the utility model in the closed state.

[0023] In the figure: 1. Housing; 11. First micro switch; 12. Second micro switch; 13. Circuit board; 2. Electric operating mechanism; 3. Rotating block; 31. Pressing surface; 4. Rocker arm; 41. Rotating portion; 411. Arc-shaped rotating body; 412. Rotating shaft; 42. Abutting section; 421. Abutting end surface; 43. Contact section; 431. Contact end; 432. Contact surface; 433. Front; 434. Side; 5. Accommodating groove; 51. Rotating groove; 52. Fixed cover. DETAILED DESCRIPTION

[0024] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1-9 As shown, an indicator mechanism of a molded case circuit breaker includes a housing 1, an electric operating mechanism 2 arranged in the housing 1, and a micro switch and a circuit board 13 arranged in the housing 1. The electric operating mechanism 2 includes a rotating block 3 arranged for rotation, two micro switches are arranged at intervals, and a swing rod 4 is rotatably arranged in the housing 1. The swing rod 4 includes a rotating portion 41 arranged in the middle, an abutting section 42 arranged on one side of the rotating portion 41 and abutting against the rotating block 3, and an abutting section 43 arranged on the other side of the rotating portion 41 and capable of abutting against two micro switches respectively. The swing rod 4 rotates through the rotating portion 41 is rotatably arranged on the housing 1, so that when the electric operating mechanism 2 is operated and the rotary block 3 is driven to rotate, the rotary block 3 is pressed against the contact section 42 and drives the rocker 4 to swing. When the contact section 43 contacts one of the micro switches, the micro switch feeds back a free tripping state signal to the circuit board 13; when the contact section 43 contacts the other micro switch, the micro switch feeds back a closing state signal to the circuit board 13; when the contact section 43 is between the two micro switches and does not contact the two micro switches, the micro switch feeds back a re-locking state signal to the circuit board 13.

[0026] By adopting the above technical solution, by setting a rocker arm 4 linked to the electric operating mechanism 2, when the electric operating mechanism 2 is in different operating states, the rocker arm 4 will swing accordingly. By changing the position state of the rocker arm 4 and the two micro switches, the closing state, free tripping state and re-locking state can be fed back to the circuit board 13.

[0027] In addition, the rotating part 41 includes an arc-shaped rotating body 411 and a rotating shaft 412 arranged on both sides of the arc-shaped rotating body 411, and the abutting section 42 and the abutting section 43 are fixed or integrally arranged on the arc-shaped rotating body 411; the rocker arm 4 is passed through the shell 1, and the shell 1 is provided with a receiving groove 5 that is adapted to the rotating part 41 and is used to accommodate the rotating part 41, and rotating grooves 51 that are adapted to the rotating shaft 412 are provided on both sides of the receiving groove 5; a fixed cover plate 52 is provided at a position corresponding to the receiving groove 5 on the casing, and the fixed cover plate 52 covers and blocks the rotating groove 51. With this arrangement, the rotating portion 41 is integrally arranged in the receiving groove 5, so that the rocker arm 4 can swing relative to the housing 1 when pressed by the rotating block 3, wherein the rotating shafts 412 on both sides are located in the rotating grooves 51 on both sides of the receiving groove 5, and the rotating shafts 412 are positioned in the rotating grooves 51 by means of a fixed cover plate 52 fixedly mounted on the housing 1, so that the rotating shafts 412 can only rotate in the rotating grooves 51, that is, the rotating portion 41 rotates in the receiving groove 5 without causing the rotating groove 51 to be separated from the receiving groove 5, thereby ensuring the rotational stability of the rotating portion 41. Specifically, the fixed cover plate 52 is fixedly mounted on the housing 1 by screws, which facilitates the subsequent lubrication and maintenance of the rotating portion 41 or the easy maintenance of the rocker arm 4. A torsion spring can be provided on the rotating portion 41 to provide a rotational restoring force for the rotating portion 41, and the provision of the fixed cover plate 52 can also play a role in pressing and fixing the torsion spring.

[0028] The abutting section 42 is set in an L-shape, and an abutting end face 421 is provided on the abutting section 42 to abut against the rotating block 3. The rotating block 3 is provided with a pressing surface 31 corresponding to the abutting end face 421. In this way, the swing rod 4 can be driven to swing by the pressing surface 31 pressing against the abutting end face 421. The abutting end face 421 can be matched with the pressing surface 31 in an inclined surface. Combined with the L-shaped abutting section 42, the abutting section 43 can accurately swing between the two micro switches.

[0029] The end of the contact section 43 away from the rotating part 41 is set as a contact end 431, which extends out of the accommodating groove 5. The contact end 431 is provided with a contact surface 432 that can abut against two micro switches. The two micro switches are respectively a first micro switch 11 away from the contact surface 432 and a second micro switch 12 close to the contact surface 432. The front side 433 of the contact surface 432 can abut against the first micro switch 11, and the side surface 434 of the contact surface 432 can abut against the second micro switch 12. When the first micro switch 11 is abutted, the circuit board 13 receives a free tripping state signal; when the second micro switch 12 is abutted, the circuit board 13 receives a closing state signal. With this arrangement, the front side 433 of the contact surface 432 contacts the first micro switch 11 , while the side surface 434 of the contact surface 432 contacts the second micro switch 12 . The structural design is reasonable, and the contact between the two micro switches can be achieved through the contact surfaces 432 at different positions.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An indicator mechanism of a molded case circuit breaker, comprising a housing (1), an electric operating mechanism (2) disposed in the housing (1), and a micro switch and a circuit board (13) disposed in the housing (1), wherein the electric operating mechanism (2) comprises a rotating block (3) arranged to rotate, and is characterized in that: Two micro switches are arranged at intervals. A swing rod (4) is rotatably arranged in the housing (1). The swing rod (4) includes a rotating portion (41) arranged in the middle, an abutting section (42) arranged on one side of the rotating portion (41) and abutting against the rotating block (3), and an abutting section (43) arranged on the other side of the rotating portion (41) and capable of abutting against the two micro switches respectively. The swing rod (4) is rotatably arranged in the housing (1) through the rotating portion (41). When the electric operating mechanism (2) is operated and the rotating block (3) is driven to rotate, the rotating block (3) is rotated. The block (3) presses against the contact section (42) and drives the swing rod (4) to swing. When the contact section (43) contacts one of the micro switches, the micro switch feeds back a free tripping state signal to the circuit board (13); when the contact section (43) contacts the other micro switch, the micro switch feeds back a closing state signal to the circuit board (13); when the contact section (43) is between the two micro switches and does not contact either of the two micro switches, the micro switch feeds back a re-locking state signal to the circuit board (13).

2. The indicator mechanism of a molded case circuit breaker according to claim 1, characterized in that: The rotating portion (41) comprises an arc-shaped rotating body (411) and rotating shafts (412) arranged on both sides of the arc-shaped rotating body (411); the abutting section (42) and the abutting section (43) are fixed or integrally arranged on the arc-shaped rotating body (411).

3. The indicator mechanism of a molded case circuit breaker according to claim 2, characterized in that: The rocker arm (4) is inserted into the housing (1). The housing (1) is provided with a receiving groove (5) adapted to the rotating portion (41) and used to accommodate the rotating portion (41). Rotating grooves (51) adapted to the rotating shaft (412) are provided on both sides of the receiving groove (5).

4. The indicator mechanism of a molded case circuit breaker according to claim 3, characterized in that: A fixed cover plate (52) is provided on the housing at a position corresponding to the accommodating groove (5), and the fixed cover plate (52) covers and blocks the rotating groove (51).

5. The indicator mechanism of a molded case circuit breaker according to claim 1, 2, 3 or 4, characterized in that: The abutting section (42) is arranged in an L-shape, and an abutting end surface (421) abutting against the rotating block (3) is provided on the abutting section (42), and a pressing surface (31) corresponding to the abutting end surface (421) is provided on the rotating block (3).

6. The indicator mechanism of a molded case circuit breaker according to claim 4, characterized in that: The end of the abutting section (43) away from the rotating portion (41) is set as an abutting end (431), and the abutting end (431) extends out of the accommodating groove (5). The abutting end (431) is provided with a abutting surface (432) capable of abutting against two micro switches.

7. The indicator mechanism of a molded case circuit breaker according to claim 6, characterized in that: The two micro switches are respectively a first micro switch (11) away from the contact surface (432) and a second micro switch (12) close to the contact surface (432); the front surface (433) of the contact surface (432) can abut against the first micro switch (11), and the side surface (434) of the contact surface (432) can abut against the second micro switch (12); when the first micro switch (11) is abutted, the circuit board (13) receives a free tripping state signal; when the second micro switch (12) is abutted, the circuit board (13) receives a closing state signal.

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