breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker, comprising a circuit breaker housing; and further comprising a locking mechanism, the locking mechanism comprising a locking piece and an elastic piece, one end of the locking piece being slidably arranged in the circuit breaker housing and connected to the circuit breaker housing through the elastic piece, and the other end being provided with a locking protrusion, the locking protrusion being protruded and arranged outside the circuit breaker housing through a first through hole arranged on the side wall of the circuit breaker housing; when the circuit breaker is installed to a circuit breaker assembly position, the housing of the circuit breaker assembly position squeezes the locking protrusion, so that the locking piece as a whole moves toward the inside of the circuit breaker housing; after the circuit breaker is assembled in place, the elastic piece makes the locking piece as a whole move toward the outside of the circuit breaker housing, and the locking protrusion is locked with the housing of the circuit breaker assembly position; the circuit breaker of the present invention has a simple structure of the locking mechanism, and a simple locking operation, thereby ensuring the reliability of circuit breaker installation.

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] The use of circuit breakers can effectively improve the safety of electrical equipment. As an important member, plug-in miniature circuit breakers have developed various structures to meet the installation needs of different electrical equipment. Most existing plug-in miniature circuit breakers are equipped with locking and unlocking mechanisms, which are important conditions to ensure reliable installation, convenient disassembly and safe use of electricity of circuit breakers.

[0003] The existing plug-in miniature circuit breakers have a complex structure of locking and unlocking mechanisms. If the locking mechanism fails when the plug-in miniature circuit breaker is in the closed state, the miniature circuit breaker will fall out of the circuit breaker assembly position, which will affect the user's power continuity and power safety. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the prior art and provide a circuit breaker, the locking mechanism of which has a simple structure and is easy to operate, thereby ensuring the reliability of the installation of the circuit breaker.

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

[0006] A circuit breaker includes a circuit breaker housing 6; and also includes a locking mechanism, the locking mechanism including a locking piece 5 and an elastic piece 4, one end of the locking piece 5 is slidably arranged in the circuit breaker housing 6 and connected to the circuit breaker housing 6 through the elastic piece 4, and the other end is provided with a locking protrusion 50, and the locking protrusion 50 is protruded and arranged outside the circuit breaker housing 6 through a first through hole 61 arranged on the side wall of the circuit breaker housing 6; when the circuit breaker is installed to the circuit breaker assembly position, the housing of the circuit breaker assembly position squeezes the locking protrusion 50, so that the locking piece 5 moves as a whole toward the inside of the circuit breaker housing 6, and after the circuit breaker is assembled in place, the elastic piece 4 moves the locking piece 5 as a whole toward the outside of the circuit breaker housing 6, and the locking protrusion 50 is locked with the housing of the circuit breaker assembly position.

[0007] Preferably, it also includes an operating mechanism and an unlocking mechanism, the operating mechanism includes a button 1 with one end inserted into the circuit breaker housing 6; when the button 1 is pulled toward the outside of the circuit breaker housing 6, the button 1 drives the locking member 5 to move as a whole toward the inside of the circuit breaker housing 6 through the unlocking mechanism, so that the locking protrusion 50 is unlocked from the housing of the circuit breaker assembly position.

[0008] Preferably, the movement direction of the circuit breaker into / out of the circuit breaker assembly position and the movement direction of the button 1 are both perpendicular to the movement direction of the locking member 5 .

[0009] Preferably, the unlocking mechanism includes an unlocking pull rod having one end connected to the button 1 and the other end provided with an unlocking end driven and cooperated with the locking member 5; the button 1 is pulled toward the outside of the circuit breaker housing 6, and the unlocking end drives the locking member 5 to move as a whole toward the inside of the circuit breaker housing 6, so that the locking protrusion 50 is unlocked from the housing of the circuit breaker assembly position.

[0010] Preferably, the locking member 5 includes an unlocking boss 51 obliquely arranged on one side thereof, and the unlocking end is drivingly engaged with the unlocking boss 51 .

[0011] Preferably, the operating mechanism also includes a U-shaped linkage rod 2 and a handle member 8, the handle member 8 is pivotally arranged in the circuit breaker housing 6, one end of the linkage rod 2 is connected to the button 1, and the other end is the second end 21 of the linkage rod, and the second end 21 of the linkage rod passes through the handle member 8 and is driven to cooperate with the locking member 5; the unlocking pull rod is the linkage rod 2, and the unlocking end is the second end 21 of the linkage rod.

[0012] Preferably, the elastic member 4 is a torsion spring, which is sleeved on the mounting shaft 64 , one end of which is connected to the locking member 5 , and the other end of which is connected to the circuit breaker housing 6 ; the handle member 8 is pivotally arranged in the circuit breaker housing 6 via the mounting shaft 64 .

[0013] Preferably, a locking member sliding groove 630 is provided at one side of the inner end of the first through hole 61 , and the locking member 5 is slidably matched with the locking member sliding groove 630 .

[0014] Preferably, a locking member support platform 631 is provided on one side of the inner end of the first through hole 61, and a locking member slide groove 630 is provided on the locking member support platform 631. The locking member 5 includes a locking member body 52, and a locking member slide platform 54 is provided on the locking member body 52. ​​The locking member slide platform 54 is arranged in the locking member slide groove 630 and slides with it.

[0015] Preferably, it also includes a button 1 with one end inserted into the circuit breaker housing 6, the button 1 includes a safety boss 12 arranged thereon, after the button 1 is pressed toward the inside of the circuit breaker housing 6 to close the circuit breaker, the safety boss 12 is located on one side of the locking member 5 and cooperates with its limit position to prevent the locking member 5 from moving toward the inside of the circuit breaker housing 6.

[0016] Preferably, the locking member 5 includes a locking member body 52, a locking protrusion 50, an unlocking boss 51, a locking member slide 54 and a limiting boss 53. The limiting boss 53 is arranged on the side of the locking member body 52 away from the locking protrusion 50, and cooperates with the safety boss 12 to limit the position. One end of the locking member body 52 is connected to the locking protrusion 50 and a locking member slide 54 is provided on the end face of the end of the locking member body 52. ​​An unlocking boss 51 is provided on one side of the other end of the locking member body 52. ​​The unlocking boss 51 is inclined, and the angle α between its extension direction and the extension direction of the locking protrusion 50 is an acute angle.

[0017] Preferably, the unlocking boss 51 further includes an inclined portion 510 and a stop portion 511 which are connected by bending, and an extending direction of the stop portion 511 is parallel to an extending direction of the locking protrusion 50 .

[0018] Preferably, it also includes an operating mechanism, a short-circuit protection mechanism 6a, an overload protection mechanism 6b, an arc extinguishing chamber 7, an incoming terminal 8a, an outgoing terminal 9, and a moving contact 5a and a static contact 5b used in conjunction with it. The outgoing terminal 9 and the button 1 are arranged side by side at one end of the circuit breaker housing 6, the incoming terminal 8a is arranged at the other end of the circuit breaker housing 6, the arc extinguishing chamber 7 and the short-circuit protection mechanism 6a are arranged side by side in the circuit breaker housing 6 and are located between the incoming terminal 8a and the outgoing terminal 9, the operating mechanism is arranged on one side of the short-circuit protection mechanism 6a, the overload protection mechanism 6b is arranged on one side of the operating mechanism and is located between the outgoing terminal 9 and the arc extinguishing chamber 7, the operating mechanism is connected to the moving contact 5a, and the static contact 5b is arranged on one side of the moving contact 5a and is fixedly connected to the circuit breaker housing 6.

[0019] Preferably, the operating mechanism includes a button 1, a linkage rod 2, a handle member 8, a connecting rod 3, a rotating plate 4a, a lock 4b and a tripping catch 4c. The handle member 8 and the rotating plate 4a are respectively pivotally arranged on the circuit breaker housing 6. One end of the button 1 is inserted into the circuit breaker housing 6. One end of the linkage rod 2 is connected to the button 1, and the other end is connected to the handle member 8. One end of the connecting rod 3 is connected to the handle member 8, and the other end is connected to the lock 4b. The lock 4b and the tripping catch 4c are respectively rotatably arranged on the rotating plate 4a, and the lock 4b and the tripping catch 4c are locked together. The rotating plate 4a is connected to the moving contact 5a, and the tripping catch 4c is respectively driven and matched with the short-circuit protection mechanism 6a and the overload protection mechanism 6b.

[0020] The locking mechanism of the circuit breaker of the present invention comprises a locking member and an elastic member, which realizes the locking of the circuit breaker and the housing of the circuit breaker assembly position. The locking mechanism has a simple structure, the locking operation of the circuit breaker is simple, and the reliable installation of the circuit breaker and the circuit breaker assembly position is ensured.

[0021] In addition, the circuit breaker of the present invention has a simple unlocking operation, and the locking mechanism and the unlocking mechanism cooperate to realize the efficient installation and removal of the small circuit breaker. In addition, after the small circuit breaker of the present invention is closed, the safety boss cooperates with the locking member to prevent the locking member from moving toward the inside of the circuit breaker housing, ensuring that the small circuit breaker of the present invention will not be pulled out in the closed state, ensuring the safety of electricity use, and avoiding the situation where the locking protrusion is unlocked from the housing of the circuit breaker assembly position due to the failure of the locking mechanism (for example, the elastic member loses its elasticity), causing the small circuit breaker to fall out, thereby ensuring the reliability of the installation of the small circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a miniature circuit breaker of the present invention, and the miniature circuit breaker is in an open state;

[0023] Figure 2 The present invention Figure 1 A schematic diagram of the enlarged structure of part A;

[0024] Figure 3 It is a structural schematic diagram of the miniature circuit breaker of the present invention, the miniature circuit breaker is in the open state, and Figure 1 In comparison, at least the matching relationship between the elastic member and the locking member is shown;

[0025] Figure 4 The present invention Figure 3 A schematic diagram of the enlarged structure of part B;

[0026] Figure 5 It is a structural schematic diagram of a miniature circuit breaker of the present invention, and the miniature circuit breaker is in a closed state;

[0027] Figure 6 The present invention Figure 5 A schematic diagram of the enlarged structure of part C;

[0028] Figure 7 It is a schematic structural diagram of the button and the locking member cooperating when the miniature circuit breaker of the present invention is in a closed state;

[0029] Figure 8 is a schematic structural diagram of a circuit breaker housing of the present invention, showing at least a first through hole, a locking member support platform and a locking member slide groove;

[0030] Fig. 9 It is a schematic diagram of the structure of the miniature circuit breaker of the present invention, at which the unlocking mechanism drives the locking member to move as a whole toward the inside of the circuit breaker housing;

[0031] Fig.10 is a schematic structural diagram of a miniature circuit breaker of the present invention, in which the unlocking mechanism drives the locking member to move as a whole toward the inside of the circuit breaker housing, and at least shows the matching relationship between the linkage rod and the unlocking boss of the locking member;

[0032] Fig.11 The present invention Fig.10 An enlarged structural diagram of part D;

[0033] Fig.12 It is a structural schematic diagram of the locking member of the present invention. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-12 The following embodiments are provided to further illustrate the specific implementation of the miniature circuit breaker of the present invention. The miniature circuit breaker of the present invention is not limited to the description of the following embodiments.

[0035] The miniature circuit breaker of the present invention comprises a circuit breaker housing 6; and also comprises a locking mechanism, wherein the locking mechanism comprises a locking piece 5 and an elastic piece 4, wherein one end of the locking piece 5 is slidably arranged in the circuit breaker housing 6 and connected to the circuit breaker housing 6 through the elastic piece 4, and the other end is provided with a locking protrusion 50, and the locking protrusion 50 is protruded and arranged outside the circuit breaker housing 6 through a first through hole 61 arranged on the side wall of the circuit breaker housing 6; when the miniature circuit breaker is installed to the circuit breaker assembly position, the housing of the circuit breaker assembly position squeezes the locking protrusion 50, so that the locking piece 5 moves as a whole toward the inside of the circuit breaker housing 6, and after the miniature circuit breaker is assembled in place, the elastic piece 4 moves the locking piece 5 as a whole toward the outside of the circuit breaker housing 6, and the locking protrusion 50 is locked with the housing of the circuit breaker assembly position.

[0036] The locking mechanism of the miniature circuit breaker of the present invention comprises a locking member 5 and an elastic member 4, which realizes the locking of the miniature circuit breaker and the housing of the circuit breaker assembly position. The locking mechanism has a simple structure, and the locking operation of the miniature circuit breaker is simple, thereby ensuring the reliable installation of the miniature circuit breaker and the circuit breaker assembly position.

[0037] Preferably, the miniature circuit breaker of the present invention further comprises a button 1 with one end inserted in the circuit breaker housing 6 and an unlocking mechanism. When the button 1 is pulled outward from the circuit breaker housing 6, the button 1 drives the locking member 5 to move inward from the circuit breaker housing 6 as a whole through the unlocking mechanism, so that the locking protrusion 50 is unlocked from the housing at the circuit breaker assembly position. The miniature circuit breaker of the present invention has a simple unlocking operation, and the locking mechanism and the unlocking mechanism cooperate to realize efficient installation and removal of the miniature circuit breaker.

[0038] Preferably, the direction in which the miniature circuit breaker is inserted into / pulled out of the circuit breaker assembly position and the moving direction of the button 1 are both perpendicular to the moving direction of the locking member 5 .

[0039] Preferably, the miniature circuit breaker of the present invention further comprises a button 1 with one end inserted into the circuit breaker housing 6, the button 1 comprises a safety boss 12 arranged thereon, after the button 1 is pressed toward the inside of the circuit breaker housing 6 to close the miniature circuit breaker, the safety boss 12 is located on one side of the locking member 5 and cooperates with the limiting position thereof, preventing the locking member 5 from moving toward the inside of the circuit breaker housing 6. After the miniature circuit breaker of the present invention is closed, the safety boss 12 cooperates with the limiting position of the locking member 5, preventing the locking member 5 from moving toward the inside of the circuit breaker housing 6, ensuring that the miniature circuit breaker of the present invention will not be pulled out in the closed state, ensuring the safety of electricity use, and avoiding the situation that the locking protrusion 50 is unlocked from the housing of the circuit breaker assembly position due to the failure of the locking mechanism (for example, the elastic member 4 loses its elasticity), causing the miniature circuit breaker to come out, thereby ensuring the reliability of the installation of the miniature circuit breaker.

[0040] It should be pointed out that the locking of the locking protrusion 50 and the housing of the circuit breaker assembly position refers to the limiting cooperation between the two, thereby preventing the small circuit breaker from being pulled out of the circuit breaker assembly position; the unlocking of the locking protrusion 50 and the housing of the circuit breaker assembly position refers to the release of the limiting cooperation between the two, thereby allowing the small circuit breaker to be pulled out of the circuit breaker assembly position.

[0041] like Figure 1-12 FIG. 1 is an embodiment of a miniature circuit breaker of the present invention.

[0042] The miniature circuit breaker of the present invention comprises a circuit breaker housing 6 and a locking mechanism, wherein the locking mechanism comprises a locking piece 5 and an elastic piece 4, wherein one end of the locking piece 5 is slidably arranged in the circuit breaker housing 6 and connected to the circuit breaker housing 6 through the elastic piece 4, and the other end is provided with a locking protrusion 50, and the locking protrusion 50 is protruded and arranged outside the circuit breaker housing 6 through a first through hole 61 arranged on the side wall of the circuit breaker housing 6; when the miniature circuit breaker is installed to the circuit breaker assembly position, the housing of the circuit breaker assembly position squeezes the locking protrusion 50, so that the locking piece 5 moves as a whole toward the inside of the circuit breaker housing 6, and after the miniature circuit breaker is assembled in place, the elastic piece 4 moves the locking piece 5 as a whole toward the outside of the circuit breaker housing 6, and the locking protrusion 50 is locked with the housing of the circuit breaker assembly position.

[0043] Preferably, the movement direction of the miniature circuit breaker of the present invention when inserting into / pulling out of the circuit breaker assembly position is perpendicular to the movement direction of the locking member 5 .

[0044] Specifically, Figure 1-4 In the direction shown, the first through hole 61 is arranged on the right side wall of the circuit breaker housing 6, the left end of the locking member 5 is slidably arranged in the circuit breaker housing 6, the right end of the locking member 5 is provided with a locking protrusion 50, the locking protrusion 50 passes through the first through hole 61 and protrudes to the right side of the circuit breaker housing 6, and the elastic member 4 is arranged on the left side of the locking member 5 to provide a rightward force to the locking member 5; when the miniature circuit breaker of the present invention is installed to the circuit breaker assembly position, the circuit breaker assembly position is inserted from the lower end of the circuit breaker housing 6, the housing of the circuit breaker assembly position will squeeze the locking protrusion 50, so that the locking member 5 moves to the left as a whole (i.e., the inner direction of the circuit breaker housing 6), and the elastic member 4 stores energy at the same time. When the miniature circuit breaker is assembled in place, the housing of the circuit breaker assembly position no longer squeezes the locking protrusion 50, then the elastic member 4 releases energy, and pushes the locking member 5 to move to the right as a whole, so that the locking protrusion 50 is locked with the housing of the circuit breaker assembly position.

[0045] Preferably, Figure 8 As shown, a locking member slide groove 630 is provided at one side of the inner end of the first through hole 61, and the locking member 5 slides in cooperation with the locking member slide groove 630. Figure 7 and 8As shown, a locking member support platform 631 is provided on one side of the inner end of the first through hole 61, and a locking member slide groove 630 is provided on the locking member support platform 631. The locking member 5 includes a locking member body 52, and a locking member slide platform 54 is provided on the locking member body 52. ​​The locking member slide platform 54 is arranged in the locking member slide groove 630 and slides with it (not shown in the figure).

[0046] Specifically, Figure 8 In the direction shown, the locking member support platform 631 is arranged on the left side of the first through hole 61 and is connected to the right side wall of the circuit breaker housing 6 below the first through hole 61. Figure 6-7 As shown, the locking member slide 54 is arranged on the lower end surface of the locking member body 52, the locking member 5 is arranged above the locking member support platform 631, and the locking member slide 54 is arranged in the locking member slide groove 630 to slide with it.

[0047] It should be pointed out that if Figure 8 In the direction shown, the locking member slide groove 630 can also be arranged above the left end of the first through hole 61, or arranged on the bottom plate of the circuit breaker housing 6 (i.e., at a position opposite to the first through hole 61), or the locking member slide groove 630 can be arranged above the left end and below the left end of the first through hole 61. Of course, the setting position of the locking member slide 54 also needs to be changed accordingly.

[0048] It should be pointed out that the elastic member 4 may also be a spring, a tension spring or a spring sheet, as long as it can provide a sufficiently large force for the locking member 5 to drive the locking protrusion 50 to move outside the circuit breaker housing 6, and will not interfere with other structures in the small circuit breaker. For example, if the elastic member 4 is a spring sheet, one end of the spring sheet is fixedly connected to the circuit breaker housing 6, and the other end is connected to the locking member 5. The elastic member 4 of the present invention is a torsion spring, which, on the one hand, provides a driving force for the locking member 5, and, on the other hand, is conducive to simplifying the structure of the circuit breaker. When the elastic member 4 is a spring, a tension spring or a spring sheet, the complexity of the circuit breaker structure may be increased to a certain extent. Therefore, the elastic member 4 of the present invention is preferably a torsion spring.

[0049] Preferably, Figure 1 , 3 As shown in , 5, 9-10, the miniature circuit breaker of the present invention also includes an unlocking mechanism and an operating mechanism. The operating mechanism includes a button 1. One end of the button 1 is inserted into the circuit breaker housing 6. When the button 1 is pulled outward from the circuit breaker housing 6, the button 1 drives the locking member 5 to move as a whole toward the inside of the circuit breaker housing 6 through the unlocking mechanism, so that the locking protrusion 50 is unlocked from the housing of the circuit breaker assembly position. Furthermore, the moving direction of the button 1 is perpendicular to the moving direction of the locking member 5. Further, as Figure 9-11As shown, the unlocking mechanism includes an unlocking pull rod with one end connected to the button 1 and the other end provided with an unlocking end drivingly matched with the locking member 5; when the button 1 is pulled outward from the circuit breaker housing 6, the unlocking end drives the locking member 5 to move as a whole toward the inside of the circuit breaker housing 6, so that the locking protrusion 50 is unlocked from the housing at the circuit breaker assembly position. Figure 10-12 As shown, the locking member 5 includes an unlocking boss 51 obliquely arranged on one side thereof, and the unlocking end is drivingly engaged with the unlocking boss 51 .

[0050] Preferably, Fig. 9 As shown, the operating mechanism also includes a U-shaped linkage rod 2 and a handle 8, the handle 8 is pivotally arranged in the circuit breaker housing 6, one end of the linkage rod 2 is connected to the button 1, and the other end is the second end 21 of the linkage rod, and the second end 21 of the linkage rod passes through the handle 8 and drives the locking member 5; the unlocking pull rod is the linkage rod 2, and the unlocking end is the second end 21 of the linkage rod. Further, as Figure 2 As shown, the handle member 8 is provided with a waist-shaped hole 82 , and the second end 21 of the linkage rod passes through the waist-shaped hole 82 and then drives and cooperates with the locking member 5 .

[0051] Specifically, Figure 9-10 In the direction shown, the lower end of the button 1 is inserted into the upper end of the circuit breaker housing 6 and can move up and down, the upper end of the linkage rod 2 is connected to the button 1, the second end 21 of the linkage rod is connected to the handle member 8, the middle part of the handle member 8 is pivotally arranged on the circuit breaker housing 6, and the second end 21 of the linkage rod passes through the handle member 8 and is located below the unlocking boss 51 of the locking member 5. The left end to the right end of the unlocking boss 51 is inclined upward. When the button 1 is pulled upward, the second end 21 of the linkage rod moves to the upper left due to the restriction of the handle member 8, and first contacts The right end of the lower side surface of the unlocking boss 51 (i.e., the right end of the driving inclined surface 510a of the contact inclined portion 510), and then the second end 21 of the linkage rod continues to move (until the second end 21 of the linkage rod moves below the stop portion 511 of the unlocking boss 51, and engages with the stop surface 511a of the stop portion 511), forcing the unlocking boss 51 to slide relative to the second end 21 of the linkage rod, and drives the locking member 5 to move to the left as a whole, until the locking protrusion 50 of the locking member 5 is unlocked from the housing of the circuit breaker assembly position.

[0052] It should be pointed out that the locking piece 5 may not be provided with the unlocking boss 51, but may be provided with an unlocking groove. The unlocking groove is inclined and has a direction similar to that of the unlocking boss 51. When the second end 21 of the linkage rod is inserted into the unlocking groove and the button 1 drives the second end 21 of the linkage rod to move upward, the second end 21 of the linkage rod drives the unlocking groove to slide relative to the second end 21 of the linkage rod, thereby driving the locking piece 5 to move as a whole toward the inside of the circuit breaker housing 6.

[0053] Preferably, Figure 3 and 4As shown, the elastic member 4 is a torsion spring, which is sleeved on the mounting shaft 64, one end of which is connected to the locking member 5, and the other end of which is connected to the circuit breaker housing 6; the handle member 8 is pivotally arranged in the circuit breaker housing 6 through the mounting shaft 64. Figure 4 As shown, the mounting shaft 64 includes a mounting shaft inner end 641 and a mounting shaft outer end 640, the outer diameter of the mounting shaft inner end 641 is larger than the outer diameter of the mounting shaft outer end 640, the torsion spring is sleeved on the mounting shaft inner end 641, and the handle member 8 is pivotally arranged on the mounting shaft outer end 640. Further, the mounting shaft 64 and the circuit breaker housing 6 are an integrated structure.

[0054] Preferably, Figure 5-7 As shown, the button 1 includes a safety boss 12 arranged thereon. After the button 1 is pressed toward the inside of the circuit breaker housing 6 to close the small circuit breaker, the safety boss 12 is located on one side of the locking member 5 and cooperates with its limit position to prevent the locking member 5 from moving toward the inside of the circuit breaker housing 6.

[0055] Specifically, Figure 5-7 In the direction shown, the safety boss 12 is arranged on the right side of the lower end of the button 1, and the button 1 is pressed downward to close the small circuit breaker. At the same time, the safety boss 12 is located on the left side of the locking member 5 and cooperates with its limit position to prevent the locking member 5 from moving to the left. Figure 7 In the direction shown, the safety boss 12 is in limited cooperation with the limiting boss 53 of the locking member 5 .

[0056] like Figure 7 and 12 FIG. 1 is an embodiment of the locking member 5 .

[0057] The locking member 5 comprises a locking member body 52, a locking protrusion 50, an unlocking boss 51, a locking member slide 54 and a limiting boss 53. The limiting boss 53 is arranged on a side of the locking member body 52 away from the locking member protrusion 50 and cooperates with the safety boss 12 in limiting position. One end of the locking member body 52 is connected to the locking protrusion 50 and a locking member slide 54 is arranged on the end surface of the locking member body 52. ​​An unlocking boss 51 is arranged on one side of the other end of the locking member body 52. ​​The unlocking boss 51 is arranged obliquely, and the angle α between its extension direction and the extension direction of the locking protrusion 50 is an acute angle. Further, as Figure 7 and 12 As shown, the unlocking boss 51 further includes an inclined portion 510 and a stop portion 511 connected by bending, and the extension direction of the stop portion 511 is parallel to the extension direction of the locking protrusion 50. Further, a driving inclined surface 510a is provided at the lower side of the inclined portion 510, and a stop surface 511a is provided at the lower side of the stop portion 511, and the driving inclined surface 510a is connected to the stop surface 511a by bending.

[0058] Specifically, Figure 7In the direction shown, the locking member body 52 and the locking protrusion 50 form an L-shaped structure as a whole, the locking protrusion 50 is arranged on the right side of the lower end of the locking member body 52, the locking member slide 54 is arranged on the end surface of the lower end of the locking member body 52, the limiting boss 53 is arranged on the left side of the upper end of the locking member body 52, and the unlocking boss 51 is arranged on the front side of the upper end of the locking member body 52, and the left end to the right end of the unlocking boss 51 is inclined upward. Further, as Fig.12 In the direction shown, the unlocking boss 51 includes an inclined portion 510 and a stop portion 511. The lower end of the inclined portion 510 protrudes on the left side of the locking member body 52, and the upper end is connected to the stop portion 511 by a bend. A driving inclined surface 510a is provided on the lower side of the inclined portion 510, and a stop surface 511a is provided on the lower side of the stop portion 511.

[0059] It should be pointed out that if Fig. 9 As shown, the miniature circuit breaker of the present invention further includes a short-circuit protection mechanism 6a, an overload protection mechanism 6b, an arc extinguishing chamber 7, an incoming terminal 8a, an outgoing terminal 9, and a moving contact 5a and a stationary contact 5b used in conjunction therewith. The outgoing terminal 9 and the button 1 are arranged side by side at one end of the circuit breaker housing 6, the incoming terminal 8a is arranged at the other end of the circuit breaker housing 6, the arc extinguishing chamber 7 and the short-circuit protection mechanism 6a are arranged side by side in the circuit breaker housing 6 and are located between the incoming terminal 8a and the outgoing terminal 9, the operating mechanism is arranged on one side of the short-circuit protection mechanism 6a, the overload protection mechanism 6b is arranged on one side of the operating mechanism and is located between the outgoing terminal 9 and the arc extinguishing chamber 7, the operating mechanism is connected to the moving contact 5a, and the stationary contact 5b is arranged on one side of the moving contact 5a and is fixedly connected to the circuit breaker housing 6.

[0060] Preferably, Fig. 9 As shown, the operating mechanism includes a button 1, a linkage rod 2, a handle member 8, a connecting rod 3, a rotating plate 4a, a lock 4b and a tripping catch 4c. The handle member 8 and the rotating plate 4a are respectively pivotally arranged on the circuit breaker housing 6. One end of the button 1 is inserted into the circuit breaker housing 6. One end of the linkage rod 2 is connected to the button 1, and the other end is connected to the handle member 8. One end of the connecting rod 3 is connected to the handle member 8, and the other end is connected to the lock 4b. The lock 4b and the tripping catch 4c are respectively rotatably arranged on the rotating plate 4a, and the lock 4b and the tripping catch 4c are locked together. The rotating plate 4a is connected to the moving contact 5a, and the tripping catch 4c is respectively driven and matched with the short-circuit protection mechanism 6a and the overload protection mechanism 6b.

[0061] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a circuit breaker housing (6); characterized in that: The invention also comprises a locking mechanism, the locking mechanism comprising a locking piece (5) and an elastic piece (4), one end of the locking piece (5) being slidably arranged in the circuit breaker housing (6) and connected to the circuit breaker housing (6) through the elastic piece (4), and the other end of the locking piece (5) being provided with a locking protrusion (50), the locking protrusion (50) being protruded and arranged outside the circuit breaker housing (6) through a first through hole (61) arranged on the side wall of the circuit breaker housing (6); when the circuit breaker is installed in the circuit breaker assembly position, the housing of the circuit breaker assembly position presses the locking protrusion (50), so that the locking piece (5) as a whole moves toward the inside of the circuit breaker housing (6); after the circuit breaker is assembled in place, the elastic piece (4) causes the locking piece (5) as a whole to move toward the outside of the circuit breaker housing (6), and the locking protrusion (50) is locked with the housing of the circuit breaker assembly position; The circuit breaker further comprises an operating mechanism and an unlocking mechanism, wherein the operating mechanism comprises a button (1) with one end inserted into the circuit breaker housing (6); the unlocking mechanism comprises an unlocking pull rod with one end connected to the button (1) and the other end provided with an unlocking end drivingly matched with the locking member (5); when the button (1) is pulled outward from the circuit breaker housing (6), the unlocking end drives the locking member (5) to move as a whole toward the inside of the circuit breaker housing (6), so that the locking protrusion (50) is unlocked from the housing at the circuit breaker assembly position; the operating mechanism further comprises a linkage rod (2) of a U-shaped structure and a handle member (8), wherein the handle member (8) is pivotally arranged in the circuit breaker housing (6), wherein one end of the linkage rod (2) is connected to the button (1) and the other end is a second end (21) of the linkage rod, and the second end (21) of the linkage rod passes through the handle member (8) and is drivingly matched with the locking member (5); the unlocking pull rod is the linkage rod (2), and the unlocking end is the second end (21) of the linkage rod.

2. The circuit breaker according to claim 1, characterized in that: The moving direction of the circuit breaker insertion / extraction into / from the circuit breaker assembly position and the moving direction of the button (1) are both perpendicular to the moving direction of the locking member (5).

3. The circuit breaker according to claim 1, characterized in that: The locking member (5) comprises an unlocking boss (51) obliquely arranged on one side thereof, and the unlocking end is drivingly matched with the unlocking boss (51).

4. The circuit breaker according to claim 1, characterized in that: The elastic member (4) is a torsion spring, which is sleeved on the mounting shaft (64), one end of which is connected to the locking member (5) and the other end of which is connected to the circuit breaker housing (6); the handle member (8) is pivotally arranged in the circuit breaker housing (6) via the mounting shaft (64).

5. The circuit breaker according to claim 1 or 2, characterized in that: A locking member sliding groove (630) is provided on one side of the inner end of the first through hole (61), and the locking member (5) is slidably matched with the locking member sliding groove (630).

6. The circuit breaker according to claim 5, characterized in that: A locking member support platform (631) is provided on one side of the inner end of the first through hole (61), and a locking member slide groove (630) is provided on the locking member support platform (631). The locking member (5) includes a locking member body (52), and a locking member slide platform (54) is provided on the locking member body (52). The locking member slide platform (54) is arranged in the locking member slide groove (630) and slidably cooperates therewith.

7. The circuit breaker according to claim 1 or 2, characterized in that: The button (1) comprises a safety boss (12) arranged thereon, and after the button (1) is pressed toward the inside of the circuit breaker housing (6) to close the circuit breaker, the safety boss (12) is located on one side of the locking member (5) and cooperates with the locking member (5) to prevent the locking member (5) from moving toward the inside of the circuit breaker housing (6).

8. The circuit breaker according to claim 7, characterized in that: The locking member (5) comprises a locking member body (52), a locking protrusion (50), an unlocking boss (51), a locking member slide (54) and a limiting boss (53). The limiting boss (53) is arranged on a side of the locking member body (52) away from the locking protrusion (50) and is limitedly matched with the safety boss (12). One end of the locking member body (52) is connected to the locking protrusion (50) and a locking member slide (54) is arranged on the end surface of the locking member body (52). One side of the other end of the locking member body (52) is provided with an unlocking boss (51). The unlocking boss (51) is inclined, and the angle α between its extension direction and the extension direction of the locking protrusion (50) is an acute angle.

9. The circuit breaker according to claim 8, characterized in that: The unlocking boss (51) further comprises an inclined portion (510) and a stop portion (511) connected by bending, and the extension direction of the stop portion (511) is parallel to the extension direction of the locking protrusion (50).

10. The circuit breaker according to claim 1, characterized in that: The invention also comprises a short-circuit protection mechanism (6a), an overload protection mechanism (6b), an arc extinguishing chamber (7), an incoming terminal (8a), an outgoing terminal (9), and a movable contact (5a) and a stationary contact (5b) used in conjunction with the short-circuit protection mechanism (6a). The outgoing terminal (9) and the button (1) are arranged side by side at one end of the circuit breaker housing (6), the incoming terminal (8a) is arranged at the other end of the circuit breaker housing (6), the arc extinguishing chamber (7) and the short-circuit protection mechanism (6a) are arranged side by side in the circuit breaker housing (6) and are located between the incoming terminal (8a) and the outgoing terminal (9), the operating mechanism is arranged on one side of the short-circuit protection mechanism (6a), the overload protection mechanism (6b) is arranged on one side of the operating mechanism and is located between the outgoing terminal (9) and the arc extinguishing chamber (7), the operating mechanism is connected to the movable contact (5a), and the stationary contact (5b) is arranged on one side of the movable contact (5a) and is fixedly connected to the circuit breaker housing (6).

11. The circuit breaker according to claim 10, characterized in that: The operating mechanism further comprises a connecting rod (3), a rotating plate (4a), a lock (4b) and a tripping catch (4c); the rotating plate (4a) is pivotally arranged on the circuit breaker housing (6); one end of the linkage rod (2) is connected to the button (1) and the other end is connected to the handle member (8); one end of the connecting rod (3) is connected to the handle member (8) and the other end is connected to the lock (4b); the lock (4b) and the tripping catch (4c) are respectively rotatably arranged on the rotating plate (4a), and the lock (4b) and the tripping catch (4c) are locked together; the rotating plate (4a) is connected to the moving contact (5a), and the tripping catch (4c) is respectively driven and matched with the short-circuit protection mechanism (6a) and the overload protection mechanism (6b).

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