Circuit breaker

Abstract

A circuit breaker includes a housing, a button disposed on the housing, and a linkage member mounted within the housing. The button has a cavity disposed therein for accommodating an indicator member, and the button has an observation window for viewing the indicator member. The indicator member includes an indicator portion for indicating the opening and closing status of the circuit breaker, a rotating shaft, and an interference portion, and the indicator member is mounted on the button via the rotating shaft. The linkage member is rotatably mounted within the circuit breaker housing, and the linkage member is provided with a limit portion that cooperates with the interference portion of the indicator member. When the button is pressed or pulled, the indicator member rotates about the rotating shaft within the cavity in cooperation with the interference portion and the limit portion, so that different areas of the indicator portion correspond to the observation window to indicate the opening and closing status of the circuit breaker. This invention facilitates the miniaturization of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to a low-voltage electrical appliance, in particular to a circuit breaker. Background Art

[0002] The use of circuit breakers can effectively improve the safety of electrical appliances. To meet the installation requirements of different electrical equipment, plug-in circuit breaker structures have evolved in various styles. With the trend toward miniaturization of electrical equipment, the overall structure and operation of compatible circuit breakers need to be further upgraded. Existing plug-in miniature circuit breakers often have the opening and closing indicators located on the operating panel, which takes up considerable space on the already small operating panel and inside the circuit breaker. This makes installation difficult, reduces production efficiency, and hinders future miniaturization of circuit breaker production designs. Summary of the Invention

[0003] The object of the present invention is to overcome the defects of the prior art and provide a circuit breaker with a simple structure and an indicator that occupies a small space.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A circuit breaker includes a housing of the circuit breaker, the housing being provided with a button for driving the opening and closing of the circuit breaker and a linkage member installed in the housing, a cavity for accommodating an indicator member being provided inside the button, an observation window for observing the indicator member being provided on the button, the indicator member including an indicating portion for indicating the opening and closing status of the circuit breaker, a rotating shaft and an interference portion, the indicator member being installed on the button via the rotating shaft, and the indicating portion extending into the cavity; the linkage member being rotatably installed in the housing of the circuit breaker, the linkage member being provided with a limiting portion cooperating with the interference portion of the indicator member; when the button is pressed or pulled, the indicator member rotates around the rotating shaft in the cavity under the cooperation of the interference portion and the limiting portion, so that different areas of the indicating portion correspond to the observation window, and the linkage member also rotates relatively.

[0006] Preferably, the linkage is further provided with a locking portion corresponding to the opening on the shell. When the button is pressed to close the switch, the linkage rotates so that the locking portion extends out of the opening on the shell; when the button is pulled to open the switch, the linkage rotates so that the locking portion retracts into the shell.

[0007] Preferably, when the button is pressed to close the switch, the interference portion of the indicator cooperates with the limiting portion to rotate the linkage member so that the locking portion extends out of the opening on the side wall of the shell, or the driving boss provided on the side wall of the button rotates the linkage member so that the locking portion extends out of the opening on the side wall of the shell.

[0008] Preferably, a locking piece is further provided in the housing, and the locking piece is linearly slidably installed in the housing through an elastic piece. The locking piece is provided with a locking boss arranged opposite to the opening on the housing, and the elastic force of the elastic piece causes the locking boss of the locking piece to extend out of the opening on the housing; after the circuit breaker is opened, the locking piece can be retracted into the housing when subjected to an external retraction force.

[0009] Preferably, the linkage member is provided with a driving part cooperating with the locking member. After the circuit breaker is opened, the button is continued to be pulled, and the interference part of the indicator cooperates with the limit part to drive the linkage member to rotate. The locking member is pressed by the driving part so that the locking boss retracts into the housing of the circuit breaker.

[0010] Preferably, the interference part is arranged at one end of the rotating shaft, and includes a first interference part and a second interference part which are not in contact with the limiting part at the same time, the first interference part and the second interference part are respectively located on both sides of the rotating shaft, and the limiting part of the linkage part extends between the first interference part and the second interference part; when the button is pressed to close the switch, the limiting part contacts the first interference part to cause the indicator to rotate in the cavity, and the indicator part indicates that the switch is closed; when the button is pulled to open the switch, the interference part of the indicator rotates around the limiting part of the linkage part to cause the second interference part to contact the limiting part, and the interaction between the limiting part and the second interference part causes the indicator to rotate in the cavity, and the indicator part displays that the switch is open.

[0011] Preferably, the indicator also includes a connecting rod, one end of the connecting rod is connected to the indicating part, and the other end is connected to the rotating shaft, and the axial direction of the rotating shaft is perpendicular to the connecting rod; the interference part is rod-shaped as a whole, and the upper part of the interference part is bent toward the direction of the linkage part to form a first interference part, and the lower part of the interference part is bent toward the direction of the linkage part to form a second interference part.

[0012] Preferably, a bending portion is provided in the middle of the connecting rod.

[0013] Preferably, the linkage part is rod-shaped as a whole, and the linkage part includes a linkage rod, and a boss is protruding from the side of the linkage rod close to the button as a limiting part that cooperates with the interference part. One end of the linkage rod is bent toward the direction of the button, and the other end of the linkage rod is provided with a raised locking part and a driving part. The locking part is located on the side close to the shell, and the driving part is located on the side away from the shell, and a linkage part rotating shaft is provided on one side of the limiting part.

[0014] Preferably, the linkage part is rod-shaped as a whole, and the linkage part includes a linkage rod, and a boss is protruding from the side of the linkage rod close to the button as a limiting part that cooperates with the interference part. One end of the linkage rod is bent toward the direction of the button, and the other end of the linkage rod is provided with a driving part, and a linkage part rotating shaft is provided on one side of the limiting part.

[0015] Preferably, the locking member includes a baffle plate, and a locking boss that can extend out of the opening of the housing is provided on one side of the baffle plate close to the housing; an elastic member that provides a restoring force is provided at the opening end of the baffle plate away from the housing; a first avoidance notch is provided beside the locking boss on the baffle plate, and the top surface of the first avoidance notch forms a driving surface that cooperates with the driving portion of the linkage member.

[0016] Preferably, the button includes a button body that cooperates with the housing, a pressing portion provided at one end of the button body, an indicator mounting portion provided at the other end of the button body, an observation window is provided on the pressing portion, a cavity for accommodating the indicator is provided inside the button body, and a shaft groove for installing the shaft of the indicator is provided on both side plates.

[0017] In the circuit breaker of the present invention, the indicator is arranged in the button and cooperates with the linkage member to indicate the opening and closing of the circuit breaker, reducing the space occupied by the indicator. While the indicator indicates the opening and closing state, the linkage member can also be used to drive other components, achieving multiple functions simultaneously, enabling both to occupy less space in the circuit breaker, which is beneficial to the miniaturized design of the circuit breaker.

[0018] In addition, a locking portion that cooperates with and locks the housing of the circuit breaker is provided on the linkage member. After the locking portion of the linkage member extends out of the opening of the housing in the closing state, it is realized that the circuit breaker cannot be inserted into or pulled out of the cavity-type circuit breaker installation position in the closing state, improving the safety of the circuit breaker.

[0019] Furthermore, a driving portion is provided on the linkage member. After the circuit breaker is tripped, when the button is continuously pulled, the indicator can drive the linkage member to rotate, and the driving portion can operate the locking member to retract the locking boss into the housing, releasing the lock with the circuit breaker installation position on the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the first embodiment of the circuit breaker of the present invention;

[0021] Figure 2 is an exploded schematic diagram of the first embodiment of the circuit breaker of the present invention;

[0022] Figure 3 is a schematic structural diagram of the cooperation between the indicator and the linkage member when the circuit breaker of the first embodiment of the present invention is tripped;

[0023] Figure 4 is a schematic structural diagram of the linkage member and the locking member when the button is continuously pulled after the circuit breaker of the first embodiment of the present invention is tripped;

[0024] Figure 5 is a schematic structural diagram of the cooperation between the indicator and the linkage member when the circuit breaker of the first embodiment of the present invention is closed;

[0025] Figure 6This is a schematic structural diagram of the linkage components when the circuit breaker of the first embodiment of the present invention is opened;

[0026] Figure 7 is a structural schematic diagram of a second embodiment of a circuit breaker of the present invention;

[0027] Figure 8 is an exploded schematic diagram of a second embodiment of a circuit breaker of the present invention;

[0028] Figure 9 This is a schematic structural diagram of the linkage member and the locking member when the button is continued to be pulled after the circuit breaker of the second embodiment of the present invention is opened;

[0029] Figure 10 yes Figure 9 A partial enlarged view of the cooperation between the indicator part and the linkage part in the middle state;

[0030] Figure 11 yes Figure 9 A partial enlarged view of the cooperation between the linkage member and the locking member in the neutral state;

[0031] Figure 12 This is a schematic structural diagram of the linkage member and the locking member when the circuit breaker of the second embodiment of the present invention is opened;

[0032] Figure 13 It is a partial enlarged view of the coordination between the indicator and the linkage in the closed state. DETAILED DESCRIPTION

[0033] The following is combined with Figures 1 to 13 The following examples are provided to further illustrate the specific implementation of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the description of the following examples.

[0034] A circuit breaker includes a housing 1 of the circuit breaker, the housing 1 being provided with a button 2 for driving the circuit breaker to open or close, and a linkage member 3 installed in the housing 1, the button 2 being provided with a cavity 21 for accommodating an indicator 4, the button 2 being provided with an observation window 22 for observing the indicator 4, the indicator 4 being provided with an indicating portion 41 for indicating the opening or closing status of the circuit breaker, a rotating shaft 42, and a resisting portion 43, the indicator 4 being mounted on the button 2 via the rotating shaft 42, and the indicating portion 41 extending into the cavity 21; the linkage member 3 being rotatably mounted in the circuit breaker housing 1, the linkage member 3 being provided with a limiting portion 31 that cooperates with the resisting portion 43 of the indicator 4; when the button 2 is pressed or pulled, the indicator 4 rotates around the rotating shaft 42 in the cavity 21 under the cooperation of the resisting portion 43 and the limiting portion 31, so that different areas of the indicating portion 41 correspond to the observation window 22, and the linkage member 3 also rotates relatively.

[0035] For the circuit breaker of the present invention, an indicating member 4 is arranged inside the button 2 and cooperates with a linkage member 3 to indicate the opening and closing of the circuit breaker, reducing the space occupied by the indicating member. While the indicating member 4 indicates the opening and closing state, the linkage member 3 can also be used to drive other components, achieving multiple functions simultaneously, enabling both to occupy less space in the circuit breaker, which is beneficial to the miniaturized design of the circuit breaker.

[0036] As shown in the first embodiment Figures 1 - 6 a plug-in circuit breaker, as shown in Figure 1 , which includes a housing 1 of the circuit breaker. A button 2 for driving the opening and closing of the circuit breaker is arranged on the housing 1. An operating mechanism drivenly connected to the button 2, a moving contact connected to the operating mechanism, a static contact cooperating with the moving contact, an arc extinguishing system, a first incoming line terminal and a first outgoing line terminal are arranged inside the housing 1. The button 2 and the first outgoing line terminal are arranged at one end of the housing 1, and the first incoming line terminal is arranged at the other end of the housing 1. Pressing the button 2, the button 2 drives the moving contact to contact and close with the static contact through the operating mechanism. Pulling the button 2, the button 2 drives the operating mechanism to drive the moving contact to separate from the static contact for opening. An overload protection mechanism is also arranged on one side of the operating mechanism. When overloaded, the bimetal sheet of the overload protection mechanism bends and the operating mechanism trips. The first incoming line terminal is a socket-type wiring terminal. When the plug-in circuit breaker is inserted into the cavity-type circuit breaker installation position, it is connected to the pin-type conductor in the circuit breaker installation position. An opening is arranged on the side wall of the housing 1 of the plug-in circuit breaker, corresponding to the locking hole on the circuit breaker installation position. Of course, according to different design requirements, when pressing the button 2, the circuit breaker can also be opened, and when pulling the button 2, the circuit breaker can be closed.

[0037] As shown in Figures 1 - 2 and 4, a cavity 21 for installing the indicating member 4 is arranged inside the button 2. An observation window 22 for observing the indicating member 4 inside the cavity 21 is arranged on the upper part of the button 2. The indicating member 4 includes an indicating portion 41 for indicating the opening and closing of the circuit breaker and a rotating shaft 42. An indicating area that can be observed through the observation window 22 is divided on the indicating portion 41. The indicating member 4 is installed on the button 2 through the rotating shaft 42, and a resisting portion 43 is arranged on one side of the rotating shaft 42; a linkage member 3 is arranged between the housing 1 and the button 2. The linkage member 3 is rotatably installed inside the circuit breaker housing 1. A limiting portion 31 is arranged at one end of the linkage member 3 close to the button 2, and a locking portion 32 corresponding to the opening on the housing 1 is arranged at the other end of the linkage member 3. The locking portion 32 cooperates with the opening arranged on the housing 1; when pressing the button 2 to close, the limiting portion 31 of the linkage member 3 makes the indicating member 4 rotate inside the cavity 21, making the indicating member 4 indicate closing; when pulling the button 2 to open, the limiting portion 31 of the linkage member 3 drives the indicating member 4 to rotate inside the cavity 21, making the indicating member 4 indicate opening.

[0038] In this embodiment, when the button 2 is pressed, the button 2 drives the circuit breaker to close through the operating mechanism. The indicating member 4 rotates counterclockwise around the rotating shaft 42 in the cavity 21 under the cooperation of the abutting portion 43 and the limiting portion 31 of the linkage member 3. The area indicating the closing of the circuit breaker in the indicating area of the indicating portion 41 is correspondingly displayed in the observation window 22. At this time, the indicating member 4 or the button 2 causes the linkage member 3 to rotate. The rotation of the linkage member 3 causes the locking portion 32 to extend out of the opening on the housing 1 and cooperate with the locking hole on the circuit breaker installation position, so that the circuit breaker cannot be inserted into or pulled out of the cavity-type circuit breaker installation position in the closed state. When the button 2 is pulled, the button 2 drives the circuit breaker to trip through the operating mechanism. The indicating member 4 rotates clockwise around the rotating shaft 42 in the cavity 21 under the cooperation of the abutting portion 43 and the limiting portion 31. The area indicating the tripping of the circuit breaker in the indicating area of the indicating portion 41 is correspondingly displayed in the observation window 22. The linkage member 3 rotates clockwise, and the locking portion 32 of the linkage member 3 retracts into the interior of the housing 1 to release the locking.

[0039] As Figure 2 、 4 As shown in FIGS. 6, the linkage member 3 is integrally rod-shaped. The rod-shaped linkage member 3 is rotatably installed in the housing 1 of the circuit breaker. A boss is protrudingly provided on one side of one end of the rod-shaped linkage member 3 close to the button 2 as the limiting portion 31 for cooperating with the abutting portion 43. The other end of the linkage member 3 is provided with a locking portion 32 for cooperating with the opening on the side of the housing 1. A linkage shaft 34 of the linkage member 3 is provided on one side of the limiting portion 31. Further, a driving portion 33 for cooperating with the locking member 5 is provided on the other side of the locking portion 32. The driving portion 33 is preferably provided on the side away from the opening of the housing 1.

[0040] As Figure 2 、 3 As shown in FIGS. 5, the abutting portion 43 of the indicating member 4 is provided at one end of the rotating shaft 42, and includes a first abutting portion 431 and a second abutting portion 432 that do not contact the limiting portion 31 simultaneously. The first abutting portion 431 and the second abutting portion 432 are respectively located on both sides of the rotating shaft 42, and both the first abutting portion 431 and the second abutting portion 432 are located on the side close to the linkage member 3. The limiting portion 31 of the linkage member 3 extends between the first abutting portion 431 and the second abutting portion 432. The rotating shaft 42 is located on the side away from the linkage member 3. When the button 2 is pressed, as Figure 5 shown, the first abutting portion 431 cooperates with the limiting portion 31. The limiting portion 31 acts on the first abutting portion 431 to cause the indicating member 4 to rotate counterclockwise. The indicating portion 41 of the indicating member 4 rotates to make the indicating area corresponding to the closing area face the observation window 22. The cooperation between the first abutting portion 431 and the limiting portion 31 causes the linkage member 3 to rotate, causing the locking portion 32 to extend out of the opening on the side wall of the housing 1. Or a driving boss provided on the side wall of the button 2 cooperates with a triangular boss on one side of the linkage member 3 (see Figure 2)The cooperation causes the linkage member 3 to rotate, making the locking portion 32 extend out of the opening on the side wall of the housing 1. The locking portion 32 cooperates with the locking hole at the circuit breaker installation position to lock, preventing the circuit breaker from being inserted and pulled out during the closing state. Pull the button 2 to trip the circuit breaker. As Figure 3 、 6 shown, the second abutting portion 432 cooperates with the limiting portion 31. The limiting portion 31 acts on the second abutting portion 432, causing both the indicating member 4 and the linkage member 3 to rotate. The indicating portion 41 of the indicating member 4 rotates to make the area indicating tripping correspond to the observation window 22, and the locking portion 32 of the linkage member 3 retracts into the housing 1, releasing the locking cooperation with the locking hole at the circuit breaker installation position. At this time, the locking boss 53 of the locking member still remains extended outside the opening of the housing 1 and can retract into the housing 1 when subjected to an indenting external force, enabling the circuit breaker to be normally inserted and removed, while also preventing the circuit breaker from falling out of the circuit breaker installation position in the cabinet due to vibrations or other reasons during transportation.

[0041] The abutting portion 43, as Figure 2 、 3 shown in 5, is rod-shaped as a whole. The upper part of the abutting portion 43 bends towards the linkage member 3 to form the first abutting portion 431, and the lower part of the abutting portion 43 bends towards the linkage member 3 to form the second abutting portion 432. The gap between the first abutting portion 431 and the second abutting portion 432 is greater than the height of the limiting portion 31, and the whole abutting portion 43 forms a shape similar to "[".

[0042] The indicating portion 41 is an arc-shaped plate with an area larger than the observation window 22 and smaller than the cross-section of the cavity 21 to ensure that the indicating portion 41 can rotate within the cavity 21. The surface of the indicating portion 41 close to the observation window 22 is divided into a closing area and a tripping area. The distinction between the closing area and the tripping area can be through color differentiation or by making corresponding marks, such as letter or graphic marks, etc.

[0043] Of course, the indicating member 4 further includes a connecting rod 44. One end of the connecting rod 44 is connected to the indicating portion 41, and the other end is connected to the rotating shaft 42. The axial direction of the rotating shaft 42 is perpendicular to the connecting rod 44. Preferably, as Figure 2 shown, a bending portion is provided in the middle of the connecting rod 44. The setting of the bending portion connects the middle of the connecting rod 44 to the middle of the indicating portion 41, facilitating the stable rotation of the indicating portion 41 within the cavity 21 of the button 2, avoiding deviation that affects the indicating function and also being convenient for mold ejection. The bending direction of the bending portion is in the rotation direction of the indicating member 4, reducing the space occupied by the connecting rod 44. The connecting rod 44 is connected between the indicating portion 41 and the rotating shaft 42. One end of the rotating shaft 42 is connected to the connecting rod 44, and the other end of the rotating shaft 42 is provided with an abutting portion 43 parallel to the connecting rod 44.

[0044] As Figure 2As described above, an embodiment of the button 2 includes a button body 23 that cooperates with the housing 1, a pressing portion 24 provided at one end of the button body 23, an indicator mounting portion 25 provided at the other end of the button body 23. An observation window 22 is provided on the pressing portion 24. A cavity 21 for accommodating the indicator 4 is provided inside the button body 23. The indicator mounting portion 25 has a U-shaped structure. One side of the U-shaped groove of the U-shaped structure communicates with the cavity 21 inside the button body 23 to limit the indicator 4. Shaft grooves 26 for mounting the rotation shaft 42 of the indicator 4 are provided on both side plates of the U-shaped structure. One end of the indicator 4 provided with the indicating portion 41 extends into the cavity 21 of the button 2. The rotation shaft 42 is mounted on the shaft groove 26 of the U-shaped structure, and the abutting portion 43 is located on one side of the button 2 and cooperates with the limiting portion 31 of the linkage member 3. The abutting portion 43 can be provided between the button 2 and the housing 1 of the circuit breaker, so that the cooperation between the limiting portion 31 and the abutting portion 43 occurs outside the cavity 21 of the button 2. Of course, a hole or notch for the limiting portion 31 to extend into can also be provided on the side wall of the cavity 21 of the button 2, so that the cooperation between the limiting portion 31 and the abutting portion 43 occurs inside the cavity 21 of the button 2.

[0045] A locking member 5 is further provided inside the housing 1. The locking member 5 is linearly slidably mounted inside the housing 1 through an elastic member 51. A sliding groove cooperating with the locking member 5 is provided inside the housing 1. The elastic member 51 is mounted between the locking member 5 and the housing 1. The locking member 5 has a locking boss 53 disposed opposite to the opening on the housing 1. The elastic force of the elastic member causes the locking boss 53 of the locking member 5 to extend out of the opening on the housing 1. When the circuit breaker is tripped, the locking member 5 can retract into the housing 1 when subjected to an indenting external force, enabling the circuit breaker to be normally plugged and unplugged, and at the same time preventing the circuit breaker from falling out of the circuit breaker installation position in the cabinet due to vibrations or other reasons during transportation. The linear sliding direction of the locking member 5 is perpendicular to the moving direction of the button 2.

[0046] As Figure 4As shown in the figure, after the circuit breaker trips, when an external retracting force is applied to the locking member 5, the locking member 5 overcomes the biasing force of the elastic member 51 and retracts the locking boss 53 into the housing. By making the locking boss 53 of the locking member 5 extend out of the opening on the housing 1 and engage with the locking hole on the circuit breaker installation position during tripping, it can effectively prevent the circuit breaker from vibrating and falling out of the cabinet due to transportation or other reasons. At the same time, since applying an external retracting force to the locking member 5 can make the locking boss 53 retract into the housing, when the circuit breaker is inserted into the cabinet in the tripped state, the locking boss 53 of the locking member 5 retracts into the housing under the action of the extrusion external force applied by the cabinet sheet metal part, enabling the circuit breaker to be smoothly inserted into the cabinet. Preferably, the cross-section of the locking boss 53 of the locking member 5 extending outside the opening on the housing 1 is a right trapezoid or a right triangle. The locking boss 53 includes a straight surface perpendicular to the side wall of the opening on the housing 1 and an inclined surface. The straight surface faces the direction in which the circuit breaker is pulled out of the cabinet, and the inclined surface faces the direction in which the circuit breaker is inserted into the cabinet, making it easy for the circuit breaker to be inserted into the cabinet during tripping.

[0047] Preferably, the elastic member 51 is a compression spring 10. Of course, the elastic member can also be other elastic members such as a torsion spring or a leaf spring, such as Figure 12 In Embodiment 2 of [reference], the elastic member is a torsion spring. Preferably, the opening that mates with the locking boss 53 and the opening that mates with the mating locking portion 32 are the same opening; of course, the opening that mates with the locking boss 53 and the opening that mates with the mating locking portion 32 can also be two side-by-side openings.

[0048] such as Figure 4 、 6 As shown in the figure, the locking member 5 includes a baffle 52. The baffle 52 is provided with a locking boss 53 on the side close to the housing 1, and an elastic member 51 that provides a restoring force is provided at the open end of the baffle 52 away from the housing 1. One end of the elastic member 51 is connected to the side of the baffle 52 away from the housing 1, and the other end is fixed inside the housing 1. A driving surface that mates with the driving portion 33 of the linkage member 3 is provided on the baffle 52. When the circuit breaker trips and needs to be pulled out, when the button 2 is further pulled outwards, the linkage member 3 rotates under the cooperation of the limiting portion 31 and the second abutting portion 432, and the driving portion 33 of the linkage member 3 presses the driving surface of the baffle 52 to make the baffle 52 overcome the elastic force of the elastic member 51, thereby causing the locking boss 53 to retract into the interior of the housing 1 of the circuit breaker.

[0049] In this embodiment, a boss is protrudingly provided on the side of the baffle 52 of the locking member 5 close to the housing 1 as a locking boss 53. A first avoidance notch for cooperating with the driving portion 33 of the linkage member 3 is provided beside the locking boss 53. A second avoidance notch is provided on one side of the driving portion 33 of the linkage member 3. One end of the elastic member 51 is fixed inside the housing 1 of the circuit breaker, and the other end of the elastic member 51 is connected to the side of the baffle 52 away from the housing 1 of the circuit breaker. The elastic member 51 is a compression spring. The elastic member 51 can be provided on the side of the locking boss 53 away from the housing 1 or on the side close to the housing 1. The locking member 5 moves inside the housing 1 of the circuit breaker under the cooperation of the spring member 51 and the driving portion 33 of the linkage member 3, so that the locking boss 53 extends out of the opening of the housing 1 or retracts into the housing.

[0050] As another embodiment of the locking member, the locking member 5 can also be directly connected to the linkage member 3, and the locking portion 5 of the locking member 5 is directly driven by the rotation of the linkage member 3 to extend out of and retract from the opening of the housing 1 of the circuit breaker, that is, no corresponding elastic member is provided. However, in this case, when the locking member 5 is position-limited and locked with the housing 1 of the circuit breaker, the force of manually plugging and unplugging the circuit breaker will be transmitted to the indicating member 4 and the button 2 through the linkage member 3, which may cause unnecessary misoperation and affect the reliability of the circuit breaker. The present invention adopts the scheme of the elastic member 51 and the baffle 52. The elastic member 51 drives the baffle 52 to be position-limited and locked with the housing 1 of the circuit breaker. When the locking member 5 is position-limited and locked with the housing 1 of the circuit breaker, the linkage member 3 does not contact the baffle 52, avoiding the transmission of force and improving the reliability of the circuit breaker.

[0051] In this embodiment, the linkage member 3 is used to be position-limited and cooperate with the installation position of the circuit breaker during closing to prevent the circuit breaker from being plugged and unplugged and operated with electricity in the closed state. At the same time, it is used to drive the locking member 5 to retract into the housing 1 when the circuit breaker is pulled out. Of course, according to needs, the linkage member 3 can also be used to drive other mechanisms, such as a counter for recording the number of times of opening and closing of the circuit breaker, or a microswitch for feedback of the opening and closing state of the circuit breaker.

[0052] The second embodiment of the present invention is as follows Figures 7 - 13As shown, the overall structure is basically the same as that of the first embodiment. The plug-in circuit breaker of this embodiment includes a housing 1 of the circuit breaker, and the housing 1 is provided with a button 2 and a linkage member 3 installed between the housing 1 and the button 2. A cavity 21 is provided inside the button 2 for accommodating an indicator 4. The indicator 4 includes an indicating portion 41 and a rotating shaft 42 for indicating the opening and closing status of the circuit breaker. An observation window 22 is provided on the upper part of the button 2 for observing the indicator 4 in the cavity 21. The indicating portion 41 is divided into an indicating area that can be observed through the observation window 22. The indicator 4 is installed on the cavity 21 through the rotating shaft 42, and a resistance portion 43 is provided on one side of the rotating shaft 42; the linkage member 3 is rotatably installed in the housing 1 of the circuit breaker, and a limiting portion 31 is provided at one end of the linkage member 3 close to the button 2, and a driving portion 33 is provided at the other end of the linkage member 3; when the button 2 is pressed, the button 2 drives the circuit breaker to close through the operating mechanism, as shown in FIG. Figure 13 As shown, the indicator 4 rotates counterclockwise around the rotation axis 42 in the cavity 21 under the cooperation of the resistance portion 43 and the limit portion 31, and the area where the circuit breaker is closed is displayed in the observation window 22; when the button 2 is pulled out, the button 2 drives the circuit breaker to open through the operating mechanism, as shown in FIG. Figure 10 As shown, the indicator 4 rotates clockwise around the rotation axis 42 in the cavity 21 under the cooperation of the abutment portion 43 and the limiting portion 31 , and the indication area of the indicator portion 41 indicating the circuit breaker opening is correspondingly displayed in the observation window 22 .

[0053] As in the embodiment, a locking member 5 is provided in the housing 1 , and the structure and action process of the locking member 5 are consistent with those in the embodiment 1.

[0054] The difference between the second embodiment and the first embodiment is that the linkage member 3 is not provided with a locking portion 32 and does not extend out of the opening on the housing 1 , and is used to cooperate with the locking hole on the circuit breaker installation position to limit the insertion and removal of the circuit breaker.

[0055] like Figure 8 、 9 As shown in Figure 11, the linkage member 3 is rod-shaped as a whole, and the linkage member 3 includes a linkage rod, which is rotatably installed in the housing 1 of the circuit breaker. A boss is protruding from the side of the linkage rod close to the button 2 as a limiting portion 31 that cooperates with the interference portion 43. As shown in the figure, the limiting portion 31 is located in the middle of the linkage rod, and the upper part of the linkage rod is bent toward the direction of the button 2 to limit the rotation angle of the linkage rod. The lower part of the linkage rod is a driving portion 33 that cooperates with the locking member 5. A linkage member rotating shaft 34 is provided on one side of the limiting portion 31. The limiting portion 31 is a square protrusion, and the limiting portion 31 extends into the button 2 and cooperates with the indicator 4.

[0056] The differences between the second embodiment and the first embodiment include the structure of the indicating member. The abutting portion 43 of the indicating member 4 is provided on the side of the rotating shaft 42 close to the linkage member 3, and includes a first abutting portion 431 and a second abutting portion 432 that do not contact the limiting portion 31 simultaneously. When the button 2 is pressed, the button 2 drives the circuit breaker to close through the operating structure, as Figure 13 shown, the first abutting portion 431 cooperates with the limiting portion 31 to make the indicating member 4 rotate counterclockwise, and the indicating portion 41 of the indicating member 4 rotates so that the area indicating closing corresponds to the observation window 22. At this time, the linkage member 3 can rotate or can be limited by the housing and not rotate; when the button 2 is pulled, the button 2 drives the circuit breaker to trip through the operating structure, as Figure 10 shown, the second abutting portion 432 cooperates with the limiting portion 31, and the indicating portion 41 of the indicating member 4 rotates so that the area indicating tripping corresponds to the observation window 22. The rotation of the linkage member 3 can be used to operate the locking member 5. At this time, as Figure 12 shown, the linkage member 3 can not rotate or rotate slightly, without driving the locking boss 53 of the locking member 5 to retract into the housing 1. The locking boss 53 of the locking member still remains protruding outside the opening of the housing 1 and can retract into the housing 1 when subjected to an external force, enabling the circuit breaker to be normally plugged and unplugged, and at the same time preventing the circuit breaker from falling out of the circuit breaker installation position due to vibration or other reasons during transportation. After the circuit breaker trips and the button 2 is continuously pulled, as Figure 9 shown, the second abutting portion 432 of the indicating member 4 cooperates with the limiting portion 31, and drives the linkage member 3 to rotate by driving the limiting portion 31, so that the driving portion 33 presses the driving surface of the locking member 5, causing the locking member 5 to overcome the elastic force of the elastic member 51, and making the locking boss 53 retract into the interior of the housing 1 of the circuit breaker.

[0057] The abutting portion 43, as Figure 8 、 10 shown in 13, is integrally a rod-shaped member that is obliquely fixed to the rotating shaft 42. The lower part of the abutting portion 43 inclines towards the linkage member 3 as the second abutting portion 432, and the upper part of the abutting portion 43 extends towards the linkage member 3 to form the first abutting portion 431. The first abutting portion 431 and the second abutting portion 432 are separated from each other and the gap between the two is greater than the height of the limiting portion 31, and the entire abutting portion 43 forms a shape similar to "<".

[0058] Of course, the indicating member 4 further includes a connecting rod 44. One end of the connecting rod 44 is connected to the indicating portion 41, and the other end is connected to the rotating shaft 42. As Figure 8 shown, the connecting rod 44 in this embodiment is a straight rod connected between the middle of the indicating portion 41 and the rotating shaft 42. One end of the rotating shaft 42 is connected to the connecting rod 44, and the other end of the rotating shaft 42 is provided with an abutting portion 43 parallel to the connecting rod 44.

[0059] Specifically, when the button 2 is pressed, the first abutting portion 431 cooperates with the limiting portion 31 of the linkage rod, causing the indicating member 4 to rotate counterclockwise. The indicating portion 41 of the indicating member 4 rotates to make the area indicating closing correspond to the observation window 22. When the button 2 is pulled, the second abutting portion 432 cooperates with the limiting portion 31, and both the indicating member 4 and the linkage rod rotate clockwise. The indicating portion 41 of the indicating member 4 rotates to make the area indicating opening correspond to the observation window 22.

[0060] The locking member 5 is linearly and slidably mounted in the housing 1 through an elastic member 51. The elastic force of the elastic member causes the locking boss 53 of the locking member 5 to protrude out of the opening on the housing 1. After an external force for indenting is applied to the locking member 5, the locking member 5 overcomes the biasing force of the elastic member 51 and causes the locking boss 53 to retract into the housing. As Figure 12 described, in this embodiment, the elastic member 51 is a torsion spring. When the circuit breaker is opened and needs to be pulled out, the button 2 is further pulled outwards, causing the limiting portion 31 of the linkage member 3 to cooperate with the second abutting portion 432 to make the linkage member 3 rotate clockwise. The driving portion 33 of the linkage rod cooperates with the locking member 5 to drive the locking boss 53 to retract into the housing 1 of the circuit breaker, releasing the locking with the working cabinet.

[0061] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a housing (1) of the circuit breaker, characterized in that: The housing (1) is provided with a button (2) for driving the circuit breaker to open or close, and a linkage member (3) installed in the housing (1); a cavity (21) for accommodating an indicator member (4) is provided inside the button (2); an observation window (22) for observing the indicator member (4) is provided on the button (2); the indicator member (4) comprises an indicating portion (41) for indicating the opening or closing status of the circuit breaker, a rotating shaft (42), and an abutting portion (43); the indicating member (4) is installed on the button (2) via the rotating shaft (42), and the indicating portion (41) extends into the cavity (21); The linkage member (3) is rotatably mounted in the housing (1) of the circuit breaker, and a limiting portion (31) is provided on the linkage member (3) for cooperating with the abutting portion (43) of the indicator member (4); When the button (2) is pressed or pulled, the indicator (4) rotates around the rotation axis (42) in the cavity (21) under the cooperation of the resistance portion (43) and the limit portion (31), so that different areas of the indicator (41) correspond to the observation window (22), and the linkage member (3) also rotates relatively. The linkage member (3) is further provided with a locking portion (32) corresponding to the opening on the housing (1); when the button (2) is pressed to close the switch, the linkage member (3) rotates so that the locking portion (32) extends out of the opening on the housing (1); when the button (2) is pulled to open the switch, the linkage member (3) rotates so that the locking portion (32) retracts into the housing (1); and / or, A locking member (5) is also provided in the housing (1). The locking member (5) is linearly slidably mounted in the housing (1) via an elastic member (51). The locking member (5) is provided with a locking boss (53) arranged opposite to the opening on the housing (1). The elastic force of the elastic member (51) causes the locking boss (53) of the locking member (5) to extend out of the opening on the housing (1). After the circuit breaker is opened, the locking member (5) can be retracted into the housing (1) when subjected to an external retraction force. The linkage member (3) is provided with a driving portion (33) that cooperates with the locking member (5). After the circuit breaker is opened, the button (2) is continuously pulled, and the contact portion (43) of the indicator member (4) cooperates with the limiting portion (31) to drive the linkage member (3) to rotate. The locking member (5) is pressed by the driving portion (33) so that the locking boss (53) is retracted into the housing (1) of the circuit breaker.

2. The circuit breaker according to claim 1, wherein: When the button (2) is pressed to close the switch, the abutment portion (43) of the indicator (4) cooperates with the limiting portion (31) to rotate the linkage member (3) so that the locking portion (32) extends out of the opening on the side wall of the housing (1), or the driving boss provided on the side wall of the button (2) rotates the linkage member (3) so that the locking portion (32) extends out of the opening on the side wall of the housing (1).

3. The circuit breaker according to claim 1, wherein: The resisting portion (43) is arranged at one end of the rotating shaft (42), and comprises a first resisting portion (431) and a second resisting portion (432) which are not in contact with the limiting portion (31) at the same time. The first resisting portion (431) and the second resisting portion (432) are respectively located on both sides of the rotating shaft (42). The limiting portion (31) of the linkage member (3) extends between the first resisting portion (431) and the second resisting portion (432). When the button (2) is pressed to close the switch, the limiting portion (31) and the first resisting portion (431) are in contact with each other. The contact portion (431) causes the indicator (4) to rotate in the cavity (21), and the indicator (41) indicates that the switch is closed; when the button (2) is pulled to open the switch, the contact portion (43) of the indicator (4) rotates around the limiting portion (31) of the linkage member (3), causing the second contact portion (432) to contact the limiting portion (31). The interaction between the limiting portion (31) and the second contact portion (432) causes the indicator (4) to rotate in the cavity (21), and the indicator (41) indicates that the switch is open.

4. The circuit breaker according to claim 3, wherein: The indicating member (4) further comprises a connecting rod (44), one end of the connecting rod (44) being connected to the indicating portion (41), and the other end being connected to the rotating shaft (42), wherein the axial direction of the rotating shaft (42) is perpendicular to the connecting rod (44); the resisting portion (43) is rod-shaped as a whole, the upper portion of the resisting portion (43) being bent in the direction of the linkage member (3) to form a first resisting portion (431), and the lower portion of the resisting portion (43) being bent in the direction of the linkage member (3) to form a second resisting portion (432).

5. The circuit breaker according to claim 4, characterized in that: A bent portion is provided in the middle of the connecting rod (44).

6. The circuit breaker according to claim 1, wherein: The linkage member (3) is rod-shaped as a whole and comprises a linkage rod. A boss is protruding from the side of the linkage rod close to the button (2) as a limiting portion (31) that cooperates with the abutting portion (43). One end of the linkage rod is bent toward the button (2). The other end of the linkage rod is provided with a protruding locking portion (32) and a driving portion (33). The locking portion (32) is located on a side close to the housing (1), and the driving portion (33) is located on a side away from the housing (1). A linkage member rotating shaft (34) is provided on one side of the limiting portion (31).

7. The circuit breaker according to claim 1, wherein: The linkage member (3) is rod-shaped as a whole and comprises a linkage rod. A boss is protruding from one side of the linkage rod close to the button (2) as a limiting portion (31) that cooperates with the abutment portion (43). One end of the linkage rod is bent toward the button (2), and a driving portion (33) is provided at the other end of the linkage rod. A linkage member rotating shaft (34) is provided on one side of the limiting portion (31).

8. The circuit breaker according to claim 1, wherein: The locking member (5) comprises a baffle (52), wherein the baffle (52) is provided with a locking boss (53) on a side close to the housing (1) and capable of extending out of an opening of the housing (1); an elastic member (51) for providing a reset force is provided at an end of the baffle (52) away from the opening of the housing (1); and the baffle (52) is provided with a first avoidance notch on the side of the locking boss (53), wherein the top surface of the first avoidance notch forms a driving surface that cooperates with the driving portion (33) of the linkage member (3).

9. The circuit breaker according to claim 1, wherein: The button (2) comprises a button body (23) matched with the housing (1), a pressing portion (24) arranged at one end of the button body (23), and an indicator mounting portion (25) arranged at the other end of the button body (23); an observation window (22) is provided on the pressing portion (24); a cavity (21) for accommodating the indicator (4) is provided inside the button body (23); and a rotating shaft groove (26) for mounting a rotating shaft (42) of the indicator (4) is provided on both side panels.

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