Linkage mechanism and circuit breaker

Abstract

The utility model discloses a linkage mechanism and a circuit breaker, and relates to the technical field of electrical equipment, the linkage mechanism is arranged on a shell of the circuit breaker, the linkage mechanism comprises a lock catch, a linkage shaft and an elastic piece, the linkage shaft of the linkage mechanism is movably arranged on the shell, two ends of the linkage shaft are exposed out of the shell, and the lock catch is arranged on the shell of the circuit breaker. The circuit breakers are connected with the two adjacent circuit breakers; the universal driving shaft and the lock catch are arranged at an interval, the elastic piece is arranged on the lock catch and presses against the universal driving shaft to drive the universal driving shaft to rotate, and the universal driving shaft rotates to drive the linkage mechanism of the two adjacent circuit breakers to rotate. The universal driving shaft and the lock catch are arranged at an interval, the end part of the universal driving shaft is not fixed on the lock catch, and the two ends of the universal driving shaft are movably arranged on the shell, so that the universal driving shaft can stably rotate without deflection, and the problems of deflection and skewing of the universal driving shaft are solved; and the conditions of linkage failure of the linkage shaft and the circuit breakers of the two adjacent poles and switching-on failure and switching-off failure of the circuit breakers of the two adjacent poles are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a linkage mechanism and a circuit breaker. Background Art

[0002] Circuit breakers are widely used as an important electrical protection device. Circuit breakers can be used to connect, carry or disconnect currents in normal and abnormal circuits.

[0003] At present, most multi-pole circuit breakers use multiple independent circuit breakers in parallel, and use a linkage mechanism to connect the circuit breakers to achieve linkage of the multiple circuit breakers.

[0004] The circuit breaker of the prior art fixes the linkage shaft on the body of the lock, one end of the linkage shaft is installed on the lock, and the other end is used to connect with the next-pole circuit breaker. However, because the linkage shaft is installed on the lock, it will deflect as the lock rotates. The linkage shaft often becomes skewed during the deflection process, resulting in a large deviation in the connection between the linkage shaft and the next-pole circuit breaker, a failure in the linkage between the linkage shaft and the next-pole circuit breaker, and a failure in closing and opening the next-pole circuit breaker. Utility Model Content

[0005] The main purpose of the utility model is to propose a linkage mechanism and a circuit breaker, which aims to solve the problem that the existing circuit breaker installs the linkage shaft on the lock, the linkage shaft deflects as the lock rotates, and then the linkage shaft becomes skewed, the linkage shaft fails to link with the next-pole circuit breaker, resulting in the next-pole circuit breaker closing failure and opening failure.

[0006] In order to achieve the above-mentioned purpose, the linkage mechanism proposed in the utility model is arranged in the housing of the circuit breaker, and the linkage mechanism includes:

[0007] A lock buckle, the lock buckle is movably mounted on the housing;

[0008] A linkage shaft, the linkage shaft is movably mounted on the housing, the linkage shaft and the lock buckle are spaced apart, and both ends of the linkage shaft are exposed from the housing; and

[0009] An elastic member is arranged on the lock buckle and presses against the linkage shaft.

[0010] In one embodiment, the shell is provided with two mounting holes corresponding to the linkage shaft, and the two ends of the linkage shaft are rotatably installed in the two mounting holes respectively. One end of the linkage shaft is provided with a plug-in hole, and the plug-in hole is exposed on the shell, and the other end is protrudingly provided with a plug-in protrusion, and the plug-in protrusion protrudes relative to the shell.

[0011] In one embodiment, the linkage shaft includes a rotating shaft and a limiting protrusion, both ends of the rotating shaft are rotatably mounted on the two mounting holes respectively, the limiting protrusion is arranged on the rotating shaft and protrudes relative to the rotating shaft, and the elastic member presses against the limiting protrusion.

[0012] In one embodiment, the lock buckle protrusion is provided with a positioning portion and a clamping block, the clamping block is spaced apart from the limiting protrusion, the elastic member is installed on the positioning portion, the elastic member is a torsion spring, and the torsion spring is provided with two elastic feet, one of which is clamped in the clamping block, and the other elastic foot presses against the limiting protrusion.

[0013] In one embodiment, a limiting groove is provided on one side of the lock buckle facing the linkage shaft, and the elastic foot of the torsion spring presses against the limiting protrusion to drive the limiting protrusion to rotate and be accommodated in the limiting groove.

[0014] In one embodiment, the limiting protrusion includes two protrusions extending in opposite directions, and the elastic foot of the elastic member presses against one of the protrusions.

[0015] In one embodiment, the linkage mechanism further includes a release member, the release member is rotatably mounted on the housing, the linkage shaft is located between the release member and the lock, and the release member rotates and can abut against the linkage shaft.

[0016] In one embodiment, the release member is provided with two branches, and the two branches are arranged at an angle, and one of the branches abuts against the linkage shaft.

[0017] In one embodiment, the housing is provided with a limiting cylinder corresponding to the mounting hole, the rotating shaft is protrudingly provided with a fixed protrusion, the rotating shaft is rotatably mounted on the limiting cylinder, and the fixed protrusion is in conflict with the limiting cylinder.

[0018] The utility model also provides a circuit breaker, which comprises a shell and a linkage mechanism.

[0019] The technical solution of the utility model is to movably install the linkage shaft of the linkage mechanism on the housing, and the two ends of the linkage shaft are exposed on the housing to connect with the circuit breakers of the adjacent two poles; the linkage shaft and the lock buckle are arranged at intervals, and the elastic member is arranged on the lock buckle and pressed against the linkage shaft, and the lock buckle contacts the linkage shaft through the elastic member, so as to utilize the rebound effect of the elastic member to drive the linkage shaft to rotate, and the rotation of the linkage shaft drives the linkage mechanism of the circuit breakers of the adjacent two poles to rotate, and the linkage shaft is linked with the circuit breakers of the adjacent two poles. Since the linkage shaft and the lock buckle are arranged at intervals, the end of the linkage shaft is not fixed on the lock buckle, the linkage shaft and the lock buckle are independent of each other, and the two ends of the independent linkage shaft are movably installed on the housing, so that it can rotate smoothly without deflection, thereby solving the problem of deflection and skewness of the linkage shaft, and reducing the occurrence of linkage failure between the linkage shaft and the circuit breakers of the adjacent two poles, closing failure and opening failure of the circuit breakers of the adjacent two poles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of a circuit breaker provided by the utility model;

[0022] Figure 2 A schematic structural diagram of an embodiment of a linkage shaft provided by the utility model;

[0023] Figure 3 A structural schematic diagram of an embodiment of the linkage mechanism provided by the utility model installed in a circuit breaker;

[0024] Figure 4 It is a structural schematic diagram of an embodiment of the linkage mechanism provided by the utility model when the spring is in an extended force storage state;

[0025] Figure 5 It is a structural schematic diagram of an embodiment of the linkage mechanism provided by the utility model when the spring is in a retracted and tightened state;

[0026] Figure 6 A cross-sectional view of an embodiment of a circuit breaker provided by the utility model;

[0027] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0028] Description of Figure Numbers:

[0029] 100. circuit breaker; 10. housing; 11. limit cylinder;

[0030] 20. linkage mechanism; 30. lock; 31. block; 32. limit groove; 33. positioning part; 40. linkage shaft; 41. rotating shaft; 410. plug-in protrusion; 411. plug-in hole; 412. fixed protrusion; 42. limit protrusion; 420. protrusion; 50. elastic member; 51. elastic foot; 60. release member; 61. branch.

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, 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 limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy 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 combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] The circuit breaker 100 of the prior art fixes the linkage shaft 40 on the body of the lock catch 30, one end of the linkage shaft 40 is installed on the lock catch 30, and the other end is used to connect with the circuit breakers 100 of the adjacent two poles. However, since the linkage shaft 40 is installed on the lock catch 30, it will deflect as the lock catch 30 rotates. The linkage shaft 40 often becomes skewed during the deflection process, resulting in a large deviation in the connection between the linkage shaft 40 and the circuit breakers 100 of the adjacent two poles, the linkage failure of the linkage shaft 40 and the circuit breakers 100 of the adjacent two poles, and the closing failure and opening failure of the circuit breakers 100 of the adjacent two poles.

[0036] The utility model proposes a linkage mechanism 20. Please refer to Figure 1 , Figure 2 and Figure 6 In one embodiment of the present invention, the linkage mechanism 20 provided by the present invention is disposed in the housing 10 of the circuit breaker 100, and the linkage mechanism 20 includes:

[0037] A lock buckle 30, the lock buckle 30 is movably mounted on the housing 10;

[0038] A linkage shaft 40, which is movably mounted on the housing 10, the linkage shaft 40 and the lock buckle 30 are spaced apart, and both ends of the linkage shaft 40 are exposed outside the housing 10; and

[0039] The elastic member 50 is disposed on the lock buckle 30 and presses against the linkage shaft 40 .

[0040] The utility model installs the linkage shaft 40 on the housing 10, and exposes both ends of the linkage shaft 40 outside the housing 10, and one end of the linkage shaft 40 can be connected to the upper pole circuit breaker 100, and the other end can be connected to the lower pole circuit breaker 100. In this way, the two circuit breakers 100 adjacent to the circuit breaker 100 are connected to the circuit breaker 100 through the linkage shaft 40.

[0041] In addition, the technical solution of the utility model is to arrange the linkage shaft 40 and the lock buckle 30 at intervals, arrange the elastic member 50 on the lock buckle 30 and press the linkage shaft 40, and the lock buckle 30 contacts the linkage shaft 40 through the elastic member 50, so as to utilize the rebound effect of the elastic member 50 to drive the linkage shaft 40 to rotate, and the rotation of the linkage shaft 40 drives the linkage mechanism 20 of the circuit breakers 100 of the adjacent two poles to rotate, and the linkage shaft 40 is linked with the circuit breakers 100 of the adjacent two poles. Since the linkage shaft 40 and the lock buckle 30 are arranged at intervals, the end of the linkage shaft 40 is not fixed on the lock buckle 30, the linkage shaft 40 and the lock buckle 30 are independent of each other, and both ends of the independent linkage shaft 40 are movably mounted on the housing 10, so that it can rotate smoothly without deflection, thereby solving the problem of deflection and skewness of the linkage shaft 40, and reducing the occurrence of linkage failure of the linkage shaft 40 and the circuit breakers 100 of the adjacent two poles, closing failure and opening failure of the circuit breakers 100 of the adjacent two poles.

[0042] In an embodiment of the utility model, a housing 10 is provided with a housing cavity, and the linkage shaft 40 and the lock 30 are rotatably installed in the housing cavity; the housing 10 is provided with two mounting holes 101, and the two mounting holes 101 are connected to the housing cavity, and both ends of the linkage shaft 40 are exposed in the mounting holes 101, so that the two ends of the linkage shaft 40 are exposed in the housing 10, thereby facilitating the subsequent connection of two adjacent circuit breakers 100 with the linkage shaft 40.

[0043] In order to connect two adjacent circuit breakers 100 with the circuit breaker 100, please refer to Figure 1 , Figure 2 and Figure 6 The outer shell 10 is provided with two mounting holes 101 corresponding to the linkage shaft 40. The two ends of the linkage shaft 40 are rotatably installed in the two mounting holes 101 respectively. One end of the linkage shaft 40 is provided with a plug-in hole 411, and the plug-in hole 411 is exposed on the outer shell 10. The other end is protrudingly provided with a plug-in protrusion 410, and the plug-in protrusion 410 is protruding relative to the outer shell 10.

[0044] In the embodiment of the utility model, the housing 10 includes a bottom housing and a front housing, and the front housing covers the bottom housing. The bottom housing and the front housing of the housing 10 are both provided with mounting holes 101, and the two mounting holes 101 are both communicated with the accommodating cavity, and the two mounting holes 101 correspond to and penetrate each other. The two ends of the linkage shaft 40 are respectively rotatably mounted on the two mounting holes 101 of the housing 10. The two ends of the linkage shaft 40 are exposed in the mounting holes 101, and the linkage shaft 40 of the upper-pole circuit breaker 100 is plugged into the plug-in hole 411 of the linkage shaft 40 of the circuit breaker 100, and then the end of the linkage shaft 40 of the circuit breaker 100 provided with the plug-in protrusion 410 is plugged into the plug-in hole 411 of the next-pole circuit breaker 100, thereby realizing the connection of the multi-pole circuit breaker 100.

[0045] The plug hole 411 can be configured as a square hole or a triangular hole. The plug protrusion 410 can be configured as a square or a triangle.

[0046] Both ends of the linkage shaft 40 are rotatably mounted on the housing 10, and the linkage shaft 40 is restricted to rotate in the housing 10. The linkage shaft 40 and the lock catch 30 are spaced apart, and the ends of the linkage shaft 40 are not fixed on the lock catch 30, so that the linkage shaft 40 rotates smoothly in the housing 10 and is not prone to deflection. In this way, the connection deviation between the linkage shaft 40 and the circuit breakers 100 of the adjacent two poles is small, which ensures the linkage stability of the linkage shaft 40 and the circuit breakers 100 of the adjacent two poles, and thus can ensure the successful closing operation or opening operation of the circuit breakers 100 of the adjacent two poles.

[0047] In order to install the linkage shaft 40 into the housing 10, see Figure 1 , Figure 2 and Figure 6 The linkage shaft 40 includes a rotating shaft 41 and a limiting protrusion 42. The two ends of the rotating shaft 41 are rotatably mounted on the two mounting holes 101 respectively. The limiting protrusion 42 is provided on the rotating shaft 41 and protrudes relative to the rotating shaft 41. The elastic member 50 presses against the limiting protrusion 42. The linkage shaft 40 is mounted on the housing 10 through the rotating shaft 41, rather than being fixed on the lock buckle 30. The linkage shaft 40 is spaced apart from the lock buckle 30, so that the linkage shaft 40 rotates smoothly in the housing 10 and does not deflect with the movement of the lock buckle 30.

[0048] In the embodiment of the utility model, one end of the rotating shaft 41 is provided with a plug hole 411, and the other end is protrudingly provided with a plug protrusion 410. Both ends of the rotating shaft 41 are rotatably mounted on the two mounting holes 101 of the housing 10, and the plug hole 411 and the plug protrusion 410 of the rotating shaft 41 are respectively exposed on opposite sides of the housing 10 so as to be connected with the linkage shaft 40 on the circuit breakers 100 of the adjacent two poles. The linkage shaft 40 rotates smoothly in the housing 10, and the connection deviation between the linkage shaft 40 and the circuit breakers 100 of the adjacent two poles is small, thereby ensuring the linkage stability of the linkage shaft 40 and the circuit breakers 100 of the adjacent two poles.

[0049] The elastic member 50 of the present invention is disposed on the lock buckle 30 and presses against the limiting protrusion 42. For details, please refer to Figures 2 to 5 The lock buckle 30 is protrudingly provided with a positioning portion 33 and a clamping block 31, the clamping block 31 is spaced apart from the limiting protrusion 42, and the elastic member 50 is installed on the positioning portion 33. The elastic member 50 is a torsion spring, which is provided with two elastic feet 51, one of which is clamped on the clamping block 31, and the other elastic foot 51 is pressed against the limiting protrusion 42.

[0050] In the embodiment of the utility model, the torsion spring is provided on the lock buckle 30, and one of the elastic feet 51 is clamped on the clamping block 31, and the other elastic foot 51 presses against the limiting protrusion 42 of the linkage shaft 40. The lock buckle 30 contacts the linkage shaft 40 through the torsion spring, so as to drive the linkage shaft 40 to rotate by utilizing the rebound effect or elastic force of the torsion spring, and the rotation of the linkage shaft 40 drives the linkage mechanism 20 of the circuit breaker 100 of the adjacent two poles to rotate.

[0051] Specifically, the torsion spring has a state of being retracted and tightened and a state of being extended and storing force. When the torsion spring is in the state of being retracted and tightened, the torsion spring drives the lock catch 30 to rotate in the clockwise direction through the rebound effect; at the same time, the torsion spring presses the limiting protrusion 42 to rotate in the counterclockwise direction through the rebound effect. Since the linkage shaft 40 of the circuit breaker 100 is connected to the linkage shafts of the circuit breakers of the adjacent two poles, the counterclockwise rotation of the linkage shaft 40 of the circuit breaker 100 can drive the linkage shafts 40 in the circuit breakers 100 of the adjacent two poles connected to the linkage shaft 40 to rotate in the counterclockwise direction.

[0052] When the torsion spring is in the state of extending and storing force, the torsion spring drives the limiting protrusion 42 to rotate counterclockwise and drives the lock buckle 30 to rotate clockwise through the elastic force. The clockwise rotation of the linkage shaft 40 of the circuit breaker 100 can drive the linkage shaft 40 in the circuit breakers 100 of the adjacent two poles connected to the linkage shaft 40 to rotate clockwise.

[0053] Further, in order to enable the linkage shaft 40 to position the lock buckle 30, please refer to Figures 2 to 5 A limiting groove 32 is provided on one side of the lock buckle 30 facing the linkage shaft 40 , and the elastic foot 51 of the torsion spring presses against the limiting protrusion 42 to drive the limiting protrusion 42 to rotate and be accommodated in the limiting groove 32 .

[0054] In an embodiment of the utility model, a torsion spring is installed on the lock buckle 30, and the elastic foot 51 on the torsion spring that is engaged with the clamping block 31 drives the lock buckle 30 to rotate in the clockwise direction through the rebound effect; at the same time, the elastic foot 51 that abuts against the limiting protrusion 42 also presses the limiting protrusion 42 to rotate in the counterclockwise direction through the rebound effect, and the limiting protrusion 42 enters the limiting groove 32, thereby enabling the limiting protrusion 42 to position the lock buckle 30 to limit the lock buckle 30 from continuing to rotate in the clockwise direction.

[0055] Among them, see Figures 2 to 5 In the embodiment of the present utility model, the limiting protrusion 42 includes two protrusions 420 extending in opposite directions, and the elastic foot 51 of the elastic member 50 presses against one of the protrusions 420 .

[0056] In the embodiment of the present invention, one elastic foot 51 of the torsion spring is clamped on the clamping block 31 , and the other elastic foot 51 presses against the protrusion 420 of the linkage shaft 40 .

[0057] The torsion spring has a state of being retracted and tightened and a state of being extended and storing force. When the torsion spring is in the state of being retracted and tightened, the torsion spring can press against the limiting protrusion 42 to rotate counterclockwise, and the torsion spring drives the lock buckle 30 to rotate clockwise through the rebound effect, and the limiting protrusion 42 enters the limiting groove 32 to position the lock buckle 30; at the same time, the operating mechanism on the lock buckle 30 contacts the static contact assembly, and the circuit breaker 100 is in the closed state. It should be noted that due to the rebound effect of the torsion spring, the direction of rotation of the linkage shaft 40 is opposite to the direction of rotation of the lock buckle 30. When the torsion spring presses against the limiting protrusion 42 and rotates counterclockwise, the entire linkage shaft 40 rotates counterclockwise. The counterclockwise rotation of the linkage shaft 40 of the circuit breaker 100 can drive the linkage shafts 40 in the circuit breakers 100 of the two adjacent poles connected to the linkage shaft 40 to rotate counterclockwise. The lock buckles 30 inside the two adjacent circuit breakers 100 can all rotate clockwise through the action of the linkage shaft 40, thereby avoiding the situation in which the locking buckles slip and the closing failure occur during the closing process of the two adjacent circuit breakers 100.

[0058] Afterwards, the lock catch 30 rotates counterclockwise, the operating mechanism on the lock catch 30 is separated from the static contact assembly, and the circuit breaker 100 is in an open state.

[0059] In order to drive the linkage shaft 40 to rotate clockwise, the linkage mechanism 20 further includes a release member 60 rotatably mounted on the housing 10 . The linkage shaft 40 is located between the release member 60 and the lock 30 . The release member 60 rotates and can resist the linkage shaft 40 .

[0060] During the process of the lock buckle 30 rotating counterclockwise and separating from the static contact assembly, the release member 60 rotates counterclockwise and lifts the limiting protrusion 42, so that the limiting protrusion 42 rotates clockwise, the limiting protrusion 42 disengages from the limiting groove 32, and pushes the torsion spring outward, so that the torsion spring extends outward and accumulates force. When the release member 60 rotates counterclockwise and lifts the limiting protrusion 42, the entire linkage shaft 40 rotates clockwise. The clockwise rotation of the linkage shaft 40 of the circuit breaker 100 can drive the linkage shaft 40 in the circuit breakers 100 of the adjacent two poles connected to the linkage shaft 40 to rotate clockwise, thereby avoiding the situation where the adjacent two-stage circuit breakers 100 slip and fail to open during the opening process.

[0061] Since the circuit breaker 100 is opened, the torsion spring is in an extended and force-accumulating state, which facilitates the subsequent separation of the tripping member 60 from the limiting protrusion 42. The torsion spring drives the limiting protrusion 42 to rotate counterclockwise and drives the lock catch 30 to rotate clockwise through the elastic force.

[0062] The linkage shaft 40 of the circuit breaker 100 rotates smoothly in the counterclockwise direction in the housing 10 without deflection, thereby ensuring that the linkage shaft 40 of the circuit breaker 100 and the linkage shafts 40 in the circuit breakers 100 of the adjacent two poles are highly stable, thereby avoiding the situation in which the adjacent two-pole circuit breakers 100 slip during the closing process and the closing failure occurs.

[0063] Furthermore, the protrusion 420 on the linkage shaft 40 abutting against the elastic foot 51 may be provided with a stopper to prevent the elastic foot 51 from escaping from the protrusion 420 .

[0064] See also Figure 3 In the embodiment of the present invention, the release member 60 is provided with two branches 61 , and the two branches 61 are arranged at an angle, and one of the branches 61 abuts against the linkage shaft 40 .

[0065] In the embodiment of the present invention, when the release member 60 rotates counterclockwise, one of the branches 61 of the release member 60 can push the limiting protrusion 42 in the clockwise direction, thereby causing the limiting protrusion 42 to rotate clockwise and disengage from the limiting groove 32. The angle between the two branches 61 is an acute angle.

[0066] See also Figure 2 , Figure 6 and Figure 7 In order to reduce the deflection of the linkage shaft 40 during rotation, the housing 10 is provided with a limiting cylinder 11 corresponding to the mounting hole 101, and the rotating shaft 41 is protrudingly provided with a fixed protrusion 412. The rotating shaft 41 is rotatably mounted on the limiting cylinder 11, and the fixed protrusion 412 is in conflict with the limiting cylinder 11.

[0067] The bottom shell and the front shell of the housing 10 are both provided with mounting holes 101, and a limiting cylinder 11 is provided on the bottom shell or the front shell. In the embodiment of the utility model, the front shell is provided with a limiting cylinder 11 protrudingly, so that a part of the structure of the rotating shaft 41 can be rotatably mounted on the limiting cylinder 11, and the other end of the rotating shaft 41 is inserted into the mounting hole 101 of the bottom shell. A fixed protrusion 412 is provided protrudingly on the rotating shaft 41 of the linkage shaft 40, and the fixed protrusion 412 conflicts with the limiting cylinder 11 to prevent the rotating shaft 41 from passing through the limiting cylinder 11 and escaping from the housing 10; the limiting cylinder 11 on the front shell can limit the rotating shaft 41 to rotate in the housing 10, and then limit the linkage shaft 40 to rotate in the housing 10. Among them, the number of the fixed protrusions 412 can be one, two or more. And the shape of the fixed protrusion 412 can be triangular, or it can be annular, etc. The utility model does not limit the number and shape of the fixed protrusions 412.

[0068] The present invention further proposes a circuit breaker 100, which includes a housing 10 and a linkage mechanism 20. The specific structure of the linkage mechanism 20 refers to the above embodiment. Since the circuit breaker 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0069] The above are only exemplary 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 specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A linkage mechanism, characterized in that: Arranged in the housing of the circuit breaker, the linkage mechanism comprises: A lock buckle, the lock buckle is movably mounted on the housing; A linkage shaft, the linkage shaft is movably mounted on the housing, the linkage shaft and the lock buckle are spaced apart, and both ends of the linkage shaft are exposed from the housing; and An elastic member is arranged on the lock buckle and presses against the linkage shaft.

2. The linkage mechanism according to claim 1, characterized in that: The shell is provided with two mounting holes corresponding to the linkage shaft, and the two ends of the linkage shaft are rotatably mounted on the two mounting holes respectively. One end of the linkage shaft is provided with a plug-in hole, which is visible on the shell, and the other end is protruding with a plug-in protrusion, which protrudes relative to the shell.

3. The linkage mechanism according to claim 2, characterized in that: The linkage shaft comprises a rotating shaft and a limiting convex portion. The two ends of the rotating shaft are rotatably mounted on the two mounting holes respectively. The limiting convex portion is arranged on the rotating shaft and protrudes relative to the rotating shaft. The elastic member presses against the limiting convex portion.

4. The linkage mechanism according to claim 3, characterized in that: The lock buckle protrudes to be provided with a positioning portion and a clamping block, the clamping block is spaced apart from the limiting protrusion, the elastic member is installed on the positioning portion, the elastic member is a torsion spring, and the torsion spring is provided with two elastic feet, one of which is clamped in the clamping block, and the other elastic foot presses against the limiting protrusion.

5. The linkage mechanism according to claim 4, characterized in that: A limiting groove is provided on one side of the lock buckle facing the linkage shaft, and the elastic foot of the torsion spring presses against the limiting convex part to drive the limiting convex part to rotate and be accommodated in the limiting groove.

6. The linkage mechanism according to any one of claims 3 to 5, characterized in that: The limiting protrusion includes two protrusions extending in opposite directions, and the elastic foot of the elastic member presses against one of the protrusions.

7. The linkage mechanism according to any one of claims 2 to 5, characterized in that: The linkage mechanism further comprises a release member, which is rotatably mounted on the housing, and the linkage shaft is located between the release member and the lock, and the release member can rotate and abut against the linkage shaft.

8. The linkage mechanism according to claim 7, characterized in that: The release member is provided with two branches, and the two branches are arranged at an angle, and one of the branches abuts against the linkage shaft.

9. The linkage mechanism according to any one of claims 3 to 5, characterized in that: The housing is provided with a limiting cylinder corresponding to the mounting hole, the rotating shaft is protrudingly provided with a fixed protrusion, the rotating shaft is rotatably mounted on the limiting cylinder, and the fixed protrusion is in conflict with the limiting cylinder.

10. A circuit breaker, characterized in that: The invention comprises a housing and a linkage mechanism as claimed in any one of claims 1 to 9.

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