A miniature circuit breaker with a new layout

Abstract

A small circuit breaker adopting a new layout relates to the field of low-voltage electrical appliances, wherein the first space and the second space are separated internally, the first space is provided with a terminal area at both ends, and the first avoidance area, a double gold sheet functional area, an L-pole moving contact area, an overcurrent functional area and an L-pole static contact area arranged side by side along the height of the first space are arranged in sequence between the terminal areas, the upper side of the double gold sheet functional area is set as an operation area, and one side of the operation area is set as a handle action area; the second space is provided with a terminal area at both ends, and a leakage functional area, an N-pole moving contact area and an N-pole static contact area are arranged in sequence between the terminal areas, and the handle action area is set throughout the first space and the second space. By optimizing the internal layout, the multifunctional integration of the small circuit breaker is realized without changing the size of the circuit breaker shell, and multiple tripping modes are realized at the same time. At the same time, the various internal linkage structures are reasonable, the layout is compact, and the number of parts is reduced, so that the response speed is faster.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a small circuit breaker adopting a new layout. Background Art

[0002] Miniature circuit breakers, especially 18mm miniature circuit breakers, have a compact internal space layout, and it is difficult to achieve a multifunctional design in a narrow shell. However, as demand changes, circuit breakers are gradually miniaturized, and new functions need to be added to achieve a reliable protection design, which poses new challenges to the internal design of miniature circuit breakers. Summary of the invention

[0003] In view of the shortcomings of the prior art, an object of the present invention is to provide a miniature circuit breaker adopting a new layout.

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

[0005] A miniature circuit breaker adopting a novel layout, wherein the interior of the miniature circuit breaker is divided into a first space and a second space.

[0006] The two ends of the first space in the length projection direction are set as terminal areas, and the first avoidance area, the double gold sheet functional area, the L-pole moving contact area, the overcurrent functional area and the L-pole static contact area arranged side by side along the height of the first space are arranged in sequence between the terminal areas along the length projection direction, the upper side of the double gold sheet functional area is set as the operation area, and one side of the operation area is set as the handle action area;

[0007] The two ends of the second space in the length projection direction are set as terminal areas, and the leakage functional area, N-pole moving contact area and N-pole static contact area are arranged in sequence between the terminal areas along the length projection direction, wherein the leakage functional area is set corresponding to the first avoidance area, and the upper and lower sides of the N-pole static contact area are respectively provided with second avoidance areas corresponding to the overcurrent functional area and the L-pole static contact area, and the handle action area runs through the first space and the second space.

[0008] The other side of the operating area in the first space is set as a first functional area.

[0009] One side of the handle action area in the second space is set as a second functional area, and the second functional area is set close to the leakage functional area.

[0010] An operating mechanism linked to the handle is provided in the operating area. One side of the operating mechanism is linked to the L-pole moving contact located in the L-pole moving contact area through a pull rod. The other side of the operating mechanism partially enters the second space and is linked to the N-pole moving contact located in the N-pole moving contact area through the pull rod.

[0011] The operating mechanism comprises:

[0012] A linkage rod is rotatably disposed in the first space, an upper end of which is provided with an L-shaped groove consisting of a transverse groove and a vertical groove, and the linkage rod partially enters the second space;

[0013] A lock buckle is rotatably mounted on the linkage rod, one end of which is provided with a hook head, and the hook head can cooperate with the vertical groove to form a locking position, and the other end of which is provided with at least one linkage part;

[0014] One end of the U-shaped connecting rod is linked to the handle, and the other end is placed in the L-shaped groove.

[0015] A current tripping assembly is provided in the overcurrent functional area, and the current tripping assembly includes a current tripper and an overcurrent tripping rod. The overcurrent tripping rod sequentially passes through the L-pole moving contact area and the double gold sheet functional area to form a linkage with the operating mechanism located in the operating area.

[0016] A double gold sheet tripping mechanism is provided in the double gold sheet functional area, and the double gold sheet tripping mechanism and the overcurrent tripping rod respectively form a linkage cooperation with the lock buckle.

[0017] The leakage functional area is provided with a leakage tripping mechanism, and the leakage tripping mechanism includes a leakage tripping rod and a leakage tripping device rotatably arranged in the second space, the rotation center of the leakage tripping rod is located above the leakage tripping device, and the first driving part is extended downward with the rotation center, the first driving part is partially placed in front of the action end of the leakage tripping device, and the upper end of the first driving part extends upward to form a second driving part of the third linkage part for triggering the lock.

[0018] The leakage tripping rod is provided with a reset torsion spring, and one end of the reset torsion spring extends to the movement path of the linkage rod, and a protrusion is provided on one end of the linkage rod facing the reset torsion spring.

[0019] A leakage test circuit is provided in the first functional area in the first space and / or a status indication component is provided in the second functional area in the second space.

[0020] The beneficial effects of the present invention are as follows: by optimizing the internal spatial layout, multifunctional integration is achieved inside the small circuit breaker without changing the size of the circuit breaker housing, and multiple tripping modes can be realized at the same time. At the same time, the various internal linkage structures are reasonable, the layout is compact, and the number of parts is reduced, so that the response speed is faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the spatial distribution of the present invention.

[0022] Figure 2 This is a schematic diagram of the functional division within the first space of the present invention.

[0023] Figure 3 This is a schematic diagram of the functional division within the second space of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure in the first space of the present invention.

[0025] Figure 5 It is a schematic diagram of the structure in the second space of the present invention.

[0026] Figure 6 It is a schematic diagram of partial structural coordination in the first space of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the linkage rod and the lock buckle of the present invention.

[0028] Figure 8 It is a schematic structural diagram of the lock buckle of the present invention.

[0029] Fig. 9 It is a schematic diagram of the structure of the current tripping assembly of the present invention in the housing.

[0030] Fig.10 It is a structural schematic diagram of the leakage tripping mechanism of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] like Figure 1 As shown, the present invention discloses a miniature circuit breaker adopting a novel layout, wherein the interior of the miniature circuit breaker is divided into a first space 1001 and a second space 1002, and the miniature circuit breaker comprises a housing 100 consisting of a first housing, an intermediate housing and a second housing, wherein the interior of the housing is divided into the first space 1001 and the second space 1002 by the intermediate housing, and the intermediate housing is used to realize electrical isolation between the first space 1001 and the second space 1002.

[0034] like Figure 2As shown, the two ends of the length projection direction of the first space 1001 are set as the wiring terminal area 40, and the first avoidance area, the double gold sheet functional area 102, the L-pole moving contact area 601, the overcurrent functional area 101 and the L-pole static contact area 201 arranged side by side along the height of the first space are arranged in sequence between the wiring terminal areas 40 along the length projection direction, and the upper side of the double gold sheet functional area 102 is set as the operation area 50, and one side of the operation area 50 is set as the handle action area 30. The first avoidance area is recessed or directly hollowed out toward the first space through the intermediate shell, and a surrounding baffle is set at the hollow edge, that is, the recessed or hollowed area is used as the layout of the leakage functional area in the second space to ensure the requirements in the width direction. At the same time, the first avoidance area is divided into two areas side by side, one above the other, and the mutual inductor area 70 for placing the mutual inductance coil and the leakage functional area for placing the leakage tripping mechanism are independently placed.

[0035] like Figure 3 As shown, the two ends of the length projection direction of the second space 1002 are set as terminal areas 40, and the leakage functional area 103, the N-pole moving contact area 602 and the N-pole static contact area 202 are arranged in sequence along the length projection direction between the terminal areas 40, wherein the leakage functional area 103 is arranged corresponding to the first avoidance area, and the upper and lower sides of the N-pole static contact area 202 are respectively provided with second avoidance areas corresponding to the overcurrent functional area 101 and the L-pole static contact area 201, and the handle action area 30 is arranged through the first space and the second space, wherein the second avoidance area is formed by being recessed toward the second space direction of the intermediate shell, which can form a space for accommodating the arc extinguishing chamber 620 in the first space, and a placement groove for placing the N-pole static contact 6102 is provided between the second avoidance area and the overcurrent functional area 101, and the N-pole static contact can contact the terminal at one end through the placement groove, and cooperate with the N-pole moving contact 4002 at the other end, thereby utilizing the narrow and long space between the two areas and realizing the fixed installation of the N-pole static contact.

[0036] At the same time, the heights of the connection terminals in the connection terminal areas in the first space and the second space are unevenly distributed. The connection terminals in the first space are located at the upper side, and a heat dissipation channel connecting the interior is formed below the connection terminals.

[0037] The other side of the operating area in the first space 1001 is set as the first functional area 90. The redundant space on one side of the operating area can be utilized to increase corresponding functions. In the present embodiment, the first functional area 90 is used as the installation space for the leakage test circuit 9001. The space vertically along the height direction of the shell just meets the installation requirements of the leakage test button. At the same time, the torsion spring is used as a switch component, and the test resistor is set in the first avoidance area, thereby realizing the placement of the leakage test circuit and making great use of the corner space in the shell.

[0038] One side of the handle action area 30 in the second space 1002 is set as the second functional area 80, and the second functional area 80 is set close to the leakage functional area 103. For the second functional area 80 in the second space 1002, since the design of the operating mechanism in the space is saved, the installation space of the original operating mechanism can be saved. Therefore, the space can be used as an area for adding additional functions. In this embodiment, a status indication component is set there, and in some products that do not require a status indication component, this place can also be used to place a leakage test circuit, and the second functional area can be functionally designed according to needs.

[0039] like Figure 4 and Figure 5 As shown, an operating mechanism 200 linked to the handle 300 is provided in the operating area 50, and one side of the operating mechanism 200 is linked to the L-pole moving contact 4001 located in the L-pole moving contact area 601 through a pull rod, and the other side of the operating mechanism 200 partially enters the second space 1002, and is linked to the N-pole moving contact 4002 located in the N-pole moving contact area 602 through a pull rod.

[0040] The operating mechanism is simplified in the present application, eliminating the need for an operating mechanism for each moving contact in the past. Only a single operating mechanism is used, which is arranged in the first space. By partially passing through the intermediate shell design, a pull rod is used to control the opening and closing of the moving contact in the other space, thereby saving a large amount of free space in the other space.

[0041] Secondly, in the present application, an independent design is carried out for the moving contact, and the fixed installation of the two moving contacts is directly achieved by relying on the mutual cooperation of the first shell, the intermediate shell and the second shell, and each moving contact can be rotatably arranged in the corresponding space, and is linked to the operating mechanism through a pull rod. In the present embodiment, the moving contact is linked to the operating mechanism through a pull rod, and in some embodiments, linkage rods, push rods and other structures can also be used, which only requires that the operating mechanism can drive the moving contact to rotate relative to the hinge point when it is in action.

[0042] like Figure 6 As shown, the present application arranges the double gold sheet tripping mechanism between the moving contact and the operating mechanism, and at the same time, the overcurrent tripping assembly and the double gold sheet tripping mechanism can act on the operating mechanism respectively, so that the operating mechanism realizes the tripping action, thereby opening the moving contact. The present application reserves a space for the installation of the double gold sheet tripping mechanism between the moving contact and the operating mechanism, and then moves the double gold sheet tripping mechanism from the terminal end of the conventional circuit breaker to the inside, and forms a large space between the terminal area, which is convenient for the installation of the leakage tripping mechanism, greatly increases the internal use space, and makes the multi-functional integration have a larger space.

[0043] like Figure 7As shown, the operating mechanism includes:

[0044] The linkage rod 210 is rotatably disposed in the first space 1001, and an L-shaped groove consisting of a horizontal groove 211 and a vertical groove 212 is disposed at its upper end, and the linkage rod 210 partially enters the second space 1002;

[0045] The lock buckle 220 is rotatably disposed on the linkage rod 210, and a hook head 221 is disposed at one end thereof, and the hook head can cooperate with the vertical groove 212 to form a locking position, and at least one linkage part 222 is disposed at the other end thereof;

[0046] One end of the U-shaped connecting rod 230 is linked to the handle 300, and the other end is placed in the L-shaped groove.

[0047] During normal operation, under the action of the torsion spring, the lock hook and the linkage rod always surround the vertical groove, enclosing the U-shaped connecting rod in the vertical groove, and the U-shaped connecting rod is fixed on the side wall of the vertical groove. The three maintain a stable structure and can move synchronously. When the lock is impacted and overcomes the rotation of the torsion spring, the hook head and the vertical groove will open, so the U-shaped connecting rod will slide out from the open place, causing the stable state between the three to be destroyed, thus realizing the tripping action.

[0048] Preferably, the two opposite surfaces of the hook head and the vertical groove are arranged as inclined surfaces, so that the U-shaped connecting rod can slide out more easily.

[0049] like Figure 8 As shown, at least two linkage parts 222 are provided at the lower side of the hinge between the lock buckle and the linkage rod, and one of the linkage parts passes through the intermediate housing and enters the second space as the third linkage part 2223, and the other linkage part extends downward to the rear side of the moving contact and is located on the action path of the double gold sheet tripping mechanism and the current tripping assembly, and it includes a first linkage part 2221 and a second linkage part 2222 arranged coaxially, wherein the first linkage part is used to cooperate with the double gold sheet tripping mechanism, and the second linkage part 2222 is used to cooperate with the current tripping assembly. Thus, the lock buckle has three tripping functions, namely, leakage tripping, overcurrent tripping, and double gold sheet tripping.

[0050] like Figure 2 , Figure 4 and Figure 6 As shown, a current tripping assembly 500 is provided in the overcurrent functional area 101, and the current tripping assembly 500 includes a current tripper 510 and an overcurrent tripping rod 520, and the overcurrent tripping rod 520 sequentially passes through the L-pole moving contact area 601 and the double gold sheet functional area 102 to form a linkage with the operating mechanism 200 located in the operating area. The cross-region linkage is achieved through the overcurrent tripping rod.

[0051] like Fig. 9As shown, two reinforcing ribs 1003 are provided on the intermediate shell, and a guide groove is formed between the two. The overcurrent trip rod is placed in the guide groove and can slide along the guide groove. At the same time, when the L-pole moving contact is fixed by the first shell and the intermediate shell, it is pressed on the top of the reinforcing rib, thereby limiting the falling off of the overcurrent trip rod. At the same time, the overcurrent trip rod will not affect the L-pole moving contact during the operation. Preferably, a guide block is provided in the guide groove, and a guide hole is provided on the overcurrent trip rod, which is a strip hole, thereby limiting its moving distance.

[0052] At the same time, the front end of the overcurrent release rod is set as the first linkage end 5201, and the rear end thereof is set as the second linkage end 5202. At the same time, the first linkage end 5201 is slightly inclined, so that it can avoid the avoidance area to trigger the lock located on the upper side of its moving path, and the rear end face of the second linkage end 5202 cooperates with the top rod of the current release 510, and its thickness is greater than that of the first linkage end, so that its front end face can cooperate with the L-pole moving contact, and then when the L-pole moving contact moves relative to the L-pole static contact 6101, that is, when the circuit breaker is closed, the L-pole moving contact drives it to reset.

[0053] like Figure 2 , Figure 4 and Figure 6 As shown, a double gold sheet tripping mechanism 700 is provided in the double gold sheet functional area 102, which and the overcurrent tripping rod 520 respectively form a linkage with the lock, wherein the double gold sheet tripping mechanism includes a double gold sheet 710 arranged between the lock and the L-pole moving contact and an adjusting bolt 720 for adjusting the double gold sheet. Because the position of the double gold sheet is moved to the center position of the shell, the adjusting bolt is moved from the bottom of the conventional wiring terminal to the lower side of the shell, that is, into the guide rail groove that cooperates with the guide rail, so that the position of the double gold sheet is adjusted without changing the difficulty of adjusting the double gold sheet.

[0054] like Figure 2 , Figure 4 , Figure 6 and Fig.10 As shown, the leakage functional area 103 is provided with a leakage tripping mechanism 800, and the leakage tripping mechanism 800 includes a leakage tripping rod and a leakage tripping device 810 rotatably arranged in the second space 1002, the rotation center of the leakage tripping rod is located above the leakage tripping device 810, and the first driving part 821 is extended downward from the rotation center, and the first driving part 821 is partially placed in front of the action end of the leakage tripping device, and the upper end of the first driving part 821 extends upward to form a second driving part 822 for triggering the third linkage part 2223 of the lock 220.

[0055] The first driving part extends along the outer contour of the leakage release, extending the distance to the rotation center, so that the leakage release can achieve the tripping action with smaller force. It pushes the first driving part to make it rotate relatively, so that the second driving part located above touches the third linkage part 2223, thereby achieving the tripping action of the lock.

[0056] The leakage tripping rod is provided with a reset torsion spring 830, and one end of the reset torsion spring 830 extends to the motion path of the linkage rod 210, and the linkage rod 210 is provided with a protrusion 213 at one end facing the reset torsion spring 830. When resetting, the part of the linkage rod passing through the intermediate housing cooperates with the N-pole moving contact through a pull rod, and a protrusion 213 is provided at its lower end. When the linkage rod rotates, the protrusion contacts the reset torsion spring and drives the entire leakage tripping rod to reset. The reset torsion spring is directly used as a driving member, and the structure is simple.

[0057] The first functional area 90 in the first space 1001 is provided with a leakage test circuit 9001 and / or the second functional area 80 in the second space 1002 is provided with a status indication component 9002 .

[0058] The leakage test circuit 9001 is composed of a test button, a test resistor and a torsion spring, wherein the torsion spring serves as a switch. Pressing the test button causes the torsion spring to connect the circuit, thereby realizing the leakage test.

[0059] The status indication assembly 9002 includes a leakage indicator and a leakage lock rotatably arranged in the second space. The indicator can be driven by a linkage rod to achieve switching of the status indication.

[0060] The leakage lock is overlapped with the leakage indicator and limits the rotation of the leakage indicator. The trip rod extends upward to form a linkage rod that cooperates with the leakage lock. The leakage indicator 600 cooperates with the lock.

[0061] That is, under normal conditions, the leakage lock restricts the movement of the leakage indicator. When the leakage releaser is actuated, the trip rod rotates relatively, the linkage rod drives the leakage lock to move, and releases the restriction on the leakage indicator. At the same time, the second linkage drives the lock to move, and the lock drives the leakage indicator to swing relatively, thereby completing the switching of the leakage status indication.

[0062] The embodiments should not be regarded as limiting the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A miniature circuit breaker, wherein the interior of the miniature circuit breaker is divided into a first space (1001) and a second space (1002), characterized in that: The two ends of the first space (1001) in the length projection direction are set as terminal blocks (40); a first avoidance zone, a double gold sheet functional zone (102), an L-pole moving contact zone (601), an overcurrent functional zone (101) and an L-pole static contact zone (201) arranged side by side along the height of the first space are arranged between the terminal blocks (40) in sequence along the length projection direction; the upper side of the double gold sheet functional zone (102) is set as an operating zone (50); and one side of the operating zone (50) is set as a handle action zone (30); The two ends of the second space (1002) in the length projection direction are arranged as terminal areas (40), and a leakage function area (103), an N-pole moving contact area (602) and an N-pole static contact area (202) are arranged in sequence along the length projection direction between the terminal areas (40), wherein the leakage function area (103) is arranged corresponding to the first avoidance area, and the upper and lower sides of the N-pole static contact area (202) are respectively provided with second avoidance areas arranged corresponding to the overcurrent function area (101) and the L-pole static contact area (201), and the handle action area (30) is arranged through the first space and the second space. An operating mechanism (200) linked to the handle (300) is provided in the operating area (50); one side of the operating mechanism (200) is linked to an L-pole moving contact (4001) located in the L-pole moving contact area (601) via a pull rod; the other side of the operating mechanism (200) partially enters the second space (1002) and is linked to an N-pole moving contact (4002) located in the N-pole moving contact area (602) via a pull rod.

2. A miniature circuit breaker according to claim 1, characterized in that: The other side of the operating area in the first space (1001) is set as a first functional area (90).

3. A miniature circuit breaker according to claim 1, characterized in that: One side of the handle action area (30) in the second space (1002) is set as a second functional area (80), and the second functional area (80) is set close to the leakage functional area (103).

4. A miniature circuit breaker according to claim 1, characterized in that: The operating mechanism comprises: A linkage rod (210) is rotatably disposed in the first space (1001), and an L-shaped groove consisting of a transverse groove (211) and a vertical groove (212) is disposed at an upper end thereof, and a portion of the linkage rod (210) enters the second space (1002); A lock buckle (220) is rotatably disposed on the linkage rod (210), one end of which is provided with a hook head (221) and the hook head can cooperate with the vertical groove (212) to form a locking position, and the other end of which is provided with at least one linkage portion (222); One end of the U-shaped connecting rod (230) is linked to the handle (300), and the other end is placed in the L-shaped groove.

5. A miniature circuit breaker according to claim 4, characterized in that: A current tripping assembly (500) is provided in the overcurrent functional area (101), and the current tripping assembly (500) comprises a current tripper (510) and an overcurrent tripping rod (520), wherein the overcurrent tripping rod (520) sequentially passes through the L-pole moving contact area (601) and the double gold sheet functional area (102) to form a linkage with the operating mechanism (200) located in the operating area.

6. A miniature circuit breaker according to claim 5, characterized in that: A double gold sheet tripping mechanism (700) is provided in the double gold sheet functional area (102), and the double gold sheet tripping mechanism and the overcurrent tripping rod (520) respectively form a linkage with the lock buckle.

7. A miniature circuit breaker according to claim 4, characterized in that: The leakage functional area (103) is provided with a leakage tripping mechanism (800), the leakage tripping mechanism (800) comprising a leakage tripping rod rotatably arranged in the second space (1002) and a leakage tripping device (810), the rotation center of the leakage tripping rod being located above the leakage tripping device (810), and extending downward from the rotation center to form a first driving part (821), the first driving part (821) being partially arranged in front of the action end of the leakage tripping device, and the upper end of the first driving part (821) extending upward to form a second driving part (822) of the third linkage part (2223) for triggering the lock buckle (220).

8. A miniature circuit breaker according to claim 7, characterized in that: A reset torsion spring (830) is provided on the leakage tripping rod, one end of the reset torsion spring (830) extends to the movement path of the linkage rod (210), and a protrusion (213) is provided on one end of the linkage rod (210) facing the reset torsion spring (830).

9. A miniature circuit breaker according to claim 1, characterized in that: The first functional area (90) in the first space (1001) is provided with a leakage test circuit (9001) and / or the second functional area (80) in the second space (1002) is provided with a status indication component (9002).

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