Miniature circuit breaker with phase partition plates

Abstract

The miniature circuit breaker comprises at least one circuit breaker body, each circuit breaker body comprises a circuit breaker shell and at least one set of wiring terminals, the wiring terminals are arranged in the circuit breaker shells, and the phase partition plates are connected with the circuit breaker shells and located near the wiring terminals; the phase partition plate comprises a first partition plate part, a second partition plate part and a mounting part, and the first partition plate part and the second partition plate part are arranged in a spaced mode and connected through the mounting part. A first clamping part is arranged on the mounting part, a second clamping part is arranged on the circuit breaker shell, and the first clamping part and the second clamping part are fixed in a clamping manner; the first partition plate part and / or the second partition plate part and the circuit breaker shell form a guide structure; when the miniature circuit breaker is installed, after the phase partition plate slides by a preset distance along a first direction through the guide structure, the first clamping part and the second clamping part are clamped and fixed, and the first direction is parallel to the height direction of the miniature circuit breaker; the installation structure has the advantage of being more convenient to install.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliances, specifically a miniature circuit breaker with phase separators. Background Technology

[0002] In miniature circuit breakers or molded case circuit breakers, phase spacers are often added to increase the creepage distance between phases, and in some countries, the addition of such phase spacers is mandatory.

[0003] Existing miniature circuit breakers have structures like the electrical insulation partition installation structure disclosed in CN202771990U. In order to achieve a tighter connection between the insulation partition and the electrical installation equipment housing (also called the circuit breaker body), multiple snap-fit ​​points are used, and the multiple snap-fit ​​points are arranged in a triangular pattern. While this provides better stability, it also makes the installation more complicated.

[0004] Therefore, how to design a more reasonable installation method for the phase partitions to facilitate user installation is a question worth considering. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a miniature circuit breaker with phase spacers.

[0006] This application provides: a miniature circuit breaker with phase partitions, comprising at least one circuit breaker body, each circuit breaker body including a circuit breaker housing and at least one set of terminals, the terminals being disposed in the circuit breaker housing, the phase partitions being connected to the circuit breaker housing and located near the terminals; wherein, the phase partitions include a first partition portion, a second partition portion, and a mounting portion, the first partition portion and the second partition portion being spaced apart and connected through the mounting portion; the mounting portion is provided with a first snap-fit ​​portion, and the circuit breaker housing is provided with a second snap-fit ​​portion, the first snap-fit ​​portion and the second snap-fit ​​portion being snap-fit ​​fixed; the first partition portion and / or the second partition portion and the circuit breaker housing form a guiding structure; during installation, the phase partitions slide a predetermined distance along a first direction through the guiding structure, causing the first snap-fit ​​portion and the second snap-fit ​​portion to be snap-fit ​​fixed, the first direction being parallel to the height direction of the miniature circuit breaker.

[0007] In some embodiments of this application, the first partition portion has a first outer partition portion I and a first inner partition portion I, and the second partition portion has a second outer partition portion I and a second inner partition portion I; one end of the mounting portion is connected to the junction of the first outer partition portion I and the first inner partition portion I, and the other end of the mounting portion is connected to the junction of the second outer partition portion I and the second inner partition portion I; the guide structure is formed by the first inner partition portion I and / or the second inner partition portion I and the circuit breaker housing.

[0008] In some embodiments of this application, the circuit breaker housing includes a first side surface, a second side surface, and a third side surface. The first side surface and the second side surface are two side surfaces in the width direction of the miniature circuit breaker, and the third side surface connects the first side surface and the second side surface. The guide structure is formed by a first inner partition portion I and the first side surface and / or by a second inner partition portion I and the second side surface. A second snap-fit ​​portion is disposed on the third side surface.

[0009] In some embodiments of this application, the guide structure includes a strip rib and a groove. During installation, the strip rib is inserted into the groove, and the two slide relative to each other.

[0010] In some embodiments of this application, the opening of the chute is an open structure, and the size of the open structure is larger than the size of the rest of the chute.

[0011] In some embodiments of this application, the second snap-fit ​​portion is a slot and the first snap-fit ​​portion is a barb; or, the second snap-fit ​​portion is a barb and the first snap-fit ​​portion is a slot or a buckle.

[0012] In some embodiments of this application, a terminal wire hole is provided on the third side surface, and the mounting part has a clearance hole or clearance groove that communicates with the outside of the wire hole.

[0013] In some embodiments of this application, the first outer partition portion I and the first inner partition portion I are misaligned in the width direction of the miniature circuit breaker, and the second outer partition portion I and the second inner partition portion I are also misaligned in the width direction of the miniature circuit breaker; the interval between the first outer partition portion I and the second outer partition portion I in the width direction of the miniature circuit breaker is a first interval, and the interval between the first inner partition portion I and the second inner partition portion I in the width direction of the miniature circuit breaker is a second interval, and the first interval is smaller than the second interval.

[0014] In some embodiments of this application, the width dimensions of the first outer partition portion I and the second outer partition portion I in the width direction of the miniature circuit breaker are the first width dimensions, and the width dimensions of the first inner partition portion I and the second inner partition portion I in the width direction of the miniature circuit breaker are the second width dimensions, wherein the first width dimension is greater than the second width dimension.

[0015] In some embodiments of this application, the third side surface is a stepped surface, including a first sub-surface, a second sub-surface, and a connecting surface. The connecting surface is perpendicular to and connected to both the first and second sub-surfaces, and the first and second sub-surfaces are arranged parallel to each other. The mounting part has a first main body part located on the surface of the first sub-surface and a second main body part located on the surface of the connecting surface. The first partition part also includes a first outer partition part II and a first inner partition part II, and the second partition part also includes a second outer partition part II and a second inner partition part II. The first side surface and the second side surface have recessed portions near the connecting surface to accommodate the first inner partition part II and the second inner partition part II, respectively. In the height direction of the miniature circuit breaker, both the first outer partition part II and the second outer partition part II extend beyond the circuit breaker housing.

[0016] The advantages of this application compared to the prior art are:

[0017] This structure, which combines a guiding structure with a snap-fit ​​structure, allows the user to guide the phase partition plate and the circuit breaker housing from the height direction during installation. Then, the phase partition plate is pushed in, and after sliding a predetermined distance along the first direction, the first snap-fit ​​part and the second snap-fit ​​part are snapped together and fixed. This snap-fit ​​structure is very convenient. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a first embodiment of the miniature circuit breaker according to this application is shown;

[0020] Figure 2 An exploded view of a first embodiment of the miniature circuit breaker according to this application is shown;

[0021] Figure 3 A perspective view of a first embodiment of the phase spacer in this application is shown;

[0022] Figure 4 A schematic diagram of the circuit breaker body of the miniature circuit breaker in an embodiment of this application is shown;

[0023] Figure 5 A schematic diagram of a second embodiment of the miniature circuit breaker according to the present application is shown;

[0024] Figure 6 An exploded view of a second embodiment of the miniature circuit breaker according to this application is shown;

[0025] Figure 7 A perspective view of a second embodiment of the phase spacer in this application is shown. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example

[0031] like Figure 1-7 As shown, an embodiment of this application is a miniature circuit breaker, which is equipped with a phase spacer 200.

[0032] Here, "miniature circuit breaker" does not specifically refer to air switches (which only provide overload and short-circuit protection). Rather, it includes air switches, residual current circuit breakers, reclosing circuit breakers, etc. These are terminal products in low-voltage electrical systems, and their rated current is between 8A and 125A.

[0033] like Figure 1 As shown, this miniature circuit breaker in this embodiment includes one circuit breaker body 100, also called a single-pole circuit breaker. However, it is not limited to only one circuit breaker body 100. It can have two circuit breaker bodies 100, also called a two-pole circuit breaker. It can have three circuit breaker bodies 100, also called a three-pole circuit breaker. It can have four circuit breaker bodies 100, also called a four-pole circuit breaker.

[0034] Each circuit breaker body 100 has a phase partition 200, and the number of phase partitions 200 in each circuit breaker body 100 corresponds to the number of its terminal blocks 300. In this embodiment, each circuit breaker body 100 has two sets of terminal blocks 300, therefore the number of phase partitions 200 is also two. Of course, there can also be only one set of terminal blocks 300, in which case there would be only one phase partition 200.

[0035] Two sets of terminals 300 are located inside the circuit breaker housing 101, specifically at both ends along the length of the miniature circuit breaker. The terminals 300 used here are screw-type terminals 300. Besides screw-type terminals 300, cage-type terminals 300 (also called spring-loaded terminals 300, or screwless terminals) or composite terminals 300 (a combination of screws and springs) can also be used.

[0036] The phase partition 200 is connected to the circuit breaker housing 101 and located near the terminal block 300. In other words, the phase partition 200 is also connected to both ends of the circuit breaker housing 101 (both ends of the miniature circuit breaker in the length direction).

[0037] In this embodiment, the two phase spacers 200 of each circuit breaker body 100 are installed in a similar manner, so one of them will be used as an example.

[0038] The phase partition 200 includes a first partition portion 201, a second partition portion 202, and a mounting portion 203. The first partition portion 201 and the second partition portion 202 are spaced apart and connected by the mounting portion 203. Specifically, the spacing is along the width direction F1 of the miniature circuit breaker. Both the first partition portion 201 and the second partition portion 202 form a guide structure S with the circuit breaker housing 101. The guiding direction of the guide structure S is a first direction, which is parallel to the height direction F2 of the miniature circuit breaker (or, the first direction is the height direction F2). The guiding function of the guide structure S is a guiding function.

[0039] The mounting part 203 is provided with a first snap-fit ​​part 2030, and the circuit breaker housing 101 is provided with a second snap-fit ​​part 1010. The first snap-fit ​​part 2030 and the second snap-fit ​​part 1010 are snap-fitted together and fixed.

[0040] With this guide structure S, a first latching part 2030 on the mounting part 203, and a second latching part 1010 on the circuit breaker housing 101, the possible installation structure is as follows: During installation, the phase partition 200 slides a predetermined distance along the first direction via the guide structure S, and then the first latching part 2030 and the second latching part 1010 form a latching fixation, thus completing the installation of the phase partition 200 and the circuit breaker housing 101. Here, the predetermined distance after sliding along the first direction is the distance from when the first latching part 2030 until it forms a latching fixation with the second latching part 1010. This predetermined distance can be set according to the actual situation.

[0041] Existing technologies using multiple locking points (triangularly distributed locking points) cannot achieve locking after sliding. They require rotating around a single locking point until all other points are locked, introducing many uncertainties and demanding extra care from the user. In contrast, this application utilizes a guide structure S combined with a locking structure. The user simply needs to form the guide structure S with the phase partition 200 and the circuit breaker housing 101, then push the phase partition 200 in until the locking structure completes the engagement, making it much easier and less labor-intensive.

[0042] Here, the guide structure S includes a scheme in which both the first partition portion 201 and the second partition portion 202 form the guide structure S with the circuit breaker housing 101; it should also include a scheme in which only the first partition portion 201 forms the guide structure S with the circuit breaker housing 101, or a scheme in which only the second partition portion 202 forms the guide structure S with the circuit breaker housing 101.

[0043] The guiding structure S is essentially a concave-convex fit scheme. There are many ways to achieve this fit, and the convex structure can be formed in various ways, such as a protruding point or a rib; while the concave structure is a groove. In this embodiment, the guiding structure S is formed by a strip rib S1 (which can also be called a rib) and a sliding groove S2 (which can also be called a groove), which allows for relative sliding. The strip rib S1 is provided on the phase partition 200, and the sliding groove S2 is formed in the circuit breaker housing 101. Of course, the opposite scheme can also be used, for example, the sliding groove S2 is formed in the phase partition 200, and the strip rib S1 is provided in the circuit breaker housing 101. This structure of sliding groove S2 and strip rib S1 has the advantages of simple processing and convenient assembly.

[0044] To facilitate the insertion of the rib S1 into the groove S2, the opening of the groove S2 is an open structure S3. The dimensions of the open structure S3 are larger than the dimensions of the rest of the groove S2. In other words, if the width of the rest of the groove S2 matches the width of the rib S1, the width of the opening of the groove S2 (open structure S3) will be greater than the width of the rib S1. This design effectively ensures that the rib S1 can smoothly enter the groove S2, which is beneficial for assembly.

[0045] Here, for the snap-fit ​​structure, the second snap-fit ​​part 1010 adopts a slot, and the first snap-fit ​​part 2030 is a barb. This structure helps to ensure the strength of the phase partition 200 and also allows for smooth assembly of the phase partition 200 and the circuit breaker housing 101. Of course, in addition, the first snap-fit ​​part 2030 can also be a slot, and the second snap-fit ​​part 1010 can be a barb. Although the strength of the phase partition 200 will be slightly weaker in this structure (compared to the opposite arrangement), it can still be used normally. Of course, in this method, the slot can also be replaced by a snap-fit, which refers to a component that can be fastened to the barb.

[0046] The first partition section 201 has a first outer partition section I 201a and a first inner partition section I 201b.

[0047] The second partition section 202 has a second outer partition section I 202a and a second inner partition section I 202b.

[0048] One end of the mounting part 203 is connected to the junction of the first outer partition part I 201a and the first inner partition part I 201b, and the other end of the mounting part 203 is connected to the junction of the second outer partition part I 202a and the second inner partition part I 202b. The guide structure S mentioned above is formed by the first inner partition part I 201b and the circuit breaker housing 101, and the second inner partition part I 202b and the circuit breaker housing 101 (of course, it can also indicate that one of the inner partition parts I is formed with the circuit breaker housing 101).

[0049] Here, the circuit breaker housing 101 includes a first side surface 101a, a second side surface 101b, and a third side surface 101c. The first side surface 101a and the second side surface 101b are two side surfaces in the width direction F1 of the miniature circuit breaker, and the third side surface 101c is the surface connecting the first side surface 101a and the second side surface 101b. Taking the six views of a three-dimensional product as an example, the first side surface 101a and the second side surface 101b can be understood as the surfaces in the front view direction and the rear view direction, respectively, and the third side surface 101c can be understood as the surface in the left view direction or the right view direction.

[0050] The guide structure S mentioned above is formed by the first inner partition portion I201b and the first side surface 101a, and the second inner partition portion I202b and the second side surface 101b.

[0051] The second snap-fit ​​part 1010 mentioned above is provided on the third side surface 101c.

[0052] With this configuration, the partition section is divided into a first inner partition section I201b, a first outer partition section I201a, a second outer partition section I202a, and a second inner partition section I202b. The first outer partition section I201a and the second outer partition section I202a are used to increase the creepage distance. The first inner partition section I201b and the second inner partition section I202b are used to complete the guiding structure S until the phase partition 200 is installed. The structure is very simple and the design is relatively reasonable.

[0053] Here, since the terminal block 300 needs to be connected to an external wire, the wire must be able to pass through. Therefore, the third side surface 101c has a wire-passing hole, allowing the wire to pass through the terminal block 300 to complete the wiring. To avoid the wire-passing hole, the mounting part 203 has a clearance hole 2031, which allows the outside to communicate with the wire-passing hole. Of course, for the mounting part 203, the strength after opening the clearance hole 2031 (the hole is closed on all sides) is better than the strength after opening the clearance groove (the groove is semi-closed, and at least one side wall of the groove is open). If the strength allows, the clearance hole 2031 structure here can also be replaced by a clearance groove.

[0054] The first outer partition portion I201a and the first inner partition portion I201b are misaligned in the width direction F1 of the miniature circuit breaker. The second outer partition portion I202a and the second inner partition portion I202b are also misaligned in the width direction F1 of the miniature circuit breaker. Furthermore, the distance between the first outer partition portion I201a and the second outer partition portion I202a in the width direction F1 of the miniature circuit breaker is a first distance M1, and the distance between the first inner partition portion I201b and the second inner partition portion I202b in the width direction F1 of the miniature circuit breaker is a second distance M2. The first distance M1 is smaller than the second distance M2.

[0055] Since the spacing between the first inner partition portion I201b and the second inner partition portion I202b is to accommodate the width of the circuit breaker body 100, the aforementioned staggered structure allows for a larger creepage distance between the phase partitions 200 of adjacent two-pole circuit breaker bodies 100. The principle is as follows: taking two adjacent phase partitions 200 of a two-pole circuit breaker body 100 as an example (the first outer partition portion I201a of the first pole and the second outer partition portion I202a of the second pole are adjacent), for each phase partition 200, its first outer partition portion I201a and first inner partition portion I201b are not staggered, nor are its second outer partition portion I202a and second inner partition portion I202b. The first outer partition portion of the first pole... The distance between I201a and the second outer partition I202a of the second pole will be smaller. However, if the first outer partition I201a and the first inner partition I201b are misaligned, and the second outer partition I202a and the second inner partition I202b are misaligned, and the first interval M1 is smaller than the second interval M2, then the distance between the first outer partition I201a of the first pole and the second outer partition I202a of the second pole will be larger.

[0056] Here, the width dimension of the first outer partition plate portion I201a and the second outer partition plate portion I202a in the width direction F1 of the miniature circuit breaker is the first width dimension N1, and the width dimension of the first inner partition plate portion I201b and the second inner partition plate portion I202b in the width direction F1 of the miniature circuit breaker is the second width dimension N2. The first width dimension N1 is greater than the second width dimension N2. This can be understood as the plate thickness of the first outer partition plate portion I201a and the second outer partition plate portion I202a being greater than the plate thickness of the first inner partition plate portion I201b and the second inner partition plate portion I202b. This arrangement is adopted because the first inner partition I201b and the second inner partition I202b need to mate with the circuit breaker housing 101. Considering that the gap between the two-pole circuit breaker bodies 100 is very small, the plate thickness here needs to be set thinner to ensure assembly with the circuit breaker housing 101. If the plate thickness here is thicker, the wall thickness of the circuit breaker housing 101 will need to be thinner to match. At the same time, ensuring that the first outer partition I201a and the second outer partition I202a are thicker is for the strength consideration of the adjacent partitions 200.

[0057] Because the third side surface 101c of the circuit breaker is a stepped surface, it can be said that the circuit breaker housing 101 is generally convex in shape. The third side surface 101c is part of the two shoulder positions of the convex shape. The third side surface 101c includes a first sub-surface 101c1, a second sub-surface 101c2, and a connecting surface 101c3. The connecting surface 101c3 is perpendicular to and connected to the first sub-surface 101c1 and the second sub-surface 101c2. The first sub-surface 101c1 and the second sub-surface 101c2 are arranged parallel to each other. This is to allow the phase spacer 200 to cover more areas and further improve the insulation effect.

[0058] The mounting part 203 has a first main body part 203a and a second main body part 203b. The first main body part 203a is attached to the surface of the first sub-surface 101c1, while the second main body part 203b is attached to the surface of the second sub-surface.

[0059] The first partition section 201 also includes a first outer partition section II 201c and a first inner partition section II 201d, and the second partition section 202 also includes a second outer partition section II 202c and a second inner partition section II 202d.

[0060] The first outer partition section II 201c is connected to the first outer partition section I 201a, and is also connected to the second main body section 203b.

[0061] The second outer partition section Ⅱ202c is connected to the second outer partition section Ⅰ202a, and is also connected to the second main body section 203b.

[0062] The first inner partition section II 201d is connected to the first inner partition section I 201b, and is also connected to the second main body section 203b.

[0063] The second inner partition section Ⅱ202d is connected to the second inner partition section Ⅰ202b, and is also connected to the second main body section 203b.

[0064] The first side surface 101a has a recessed portion P at the junction with the connecting surface 101c3, that is, near the connecting surface 101c3. Similarly, the second side surface 101b also has a recessed portion P at the junction with the connecting surface 101c3, that is, near the connecting surface 101c3. These two recessed portions P are used to accommodate the first inner partition portion II 201d and the second inner partition portion II 202d, respectively.

[0065] In the height direction F2 of the miniature circuit breaker, both the first outer partition portion II201c and the second outer partition portion II202c extend beyond the circuit breaker housing 101.

[0066] This implementation of the phase spacer 200 can better improve the creepage distance between the two-pole circuit breaker bodies 100.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A miniature circuit breaker with phase spacers, comprising at least one circuit breaker body, each circuit breaker body including a circuit breaker housing and at least one set of terminals, the terminals being disposed within the circuit breaker housing, and the phase spacers being connected to the circuit breaker housing and located near the terminals; characterized in that: The phase partition includes a first partition portion, a second partition portion, and a mounting portion. The first partition portion and the second partition portion are spaced apart and connected by the mounting portion. The mounting portion is provided with a first snap-fit ​​portion, and the circuit breaker housing is provided with a second snap-fit ​​portion. The first snap-fit ​​portion and the second snap-fit ​​portion are snap-fitted and fixed. The first partition portion and / or the second partition portion form a guide structure with the circuit breaker housing. During installation, the phase partition slides a predetermined distance along a first direction through the guide structure, so that the first snap-fit ​​portion and the second snap-fit ​​portion are snap-fitted and fixed. The first direction is parallel to the height direction of the miniature circuit breaker.

2. A miniature circuit breaker with phase spacers according to claim 1, characterized in that: The first partition portion has a first outer partition portion I and a first inner partition portion I, and the second partition portion has a second outer partition portion I and a second inner partition portion I; One end of the mounting part is connected to the junction of the first outer partition part I and the first inner partition part I, and the other end of the mounting part is connected to the junction of the second outer partition part I and the second inner partition part I; the guide structure is formed by the first inner partition part I and / or the second inner partition part I and the circuit breaker housing.

3. A miniature circuit breaker with phase spacers according to claim 2, characterized in that: The circuit breaker housing includes a first side surface, a second side surface, and a third side surface. The first side surface and the second side surface are two side surfaces in the width direction of the miniature circuit breaker, and the third side surface connects the first side surface and the second side surface. The guide structure is formed by a first inner partition portion I and the first side surface and / or by a second inner partition portion I and the second side surface. A second snap-fit ​​portion is provided on the third side surface.

4. A miniature circuit breaker with phase spacers according to claim 1, 2, or 3, characterized in that: The guide structure includes strip ribs and grooves. During installation, the strip ribs are inserted into the grooves, and the two slide relative to each other.

5. A miniature circuit breaker with phase spacers according to claim 4, characterized in that: The opening of the chute is an open structure, and the size of the open structure is larger than the size of the rest of the chute.

6. A miniature circuit breaker with phase spacers according to claim 1, 2, or 3, characterized in that: The second latching part is a latching slot, and the first latching part is a barb; or, the second latching part is a barb, and the first latching part is a latching slot or a buckle.

7. A miniature circuit breaker with phase spacers according to claim 3, characterized in that: A terminal wire hole is provided on the third side surface, and the mounting part has a clearance hole or clearance groove that connects the outside to the wire hole.

8. A miniature circuit breaker with phase spacers according to claim 2, characterized in that: The first outer partition section I and the first inner partition section I are misaligned in the width direction of the miniature circuit breaker, and the second outer partition section I and the second inner partition section I are also misaligned in the width direction of the miniature circuit breaker; the interval between the first outer partition section I and the second outer partition section I in the width direction of the miniature circuit breaker is the first interval, and the interval between the first inner partition section I and the second inner partition section I in the width direction of the miniature circuit breaker is the second interval, and the first interval is smaller than the second interval.

9. A miniature circuit breaker with phase spacers according to claim 2, characterized in that: The width dimensions of the first outer partition section I and the second outer partition section I in the width direction of the miniature circuit breaker are the first width dimensions, and the width dimensions of the first inner partition section I and the second inner partition section I in the width direction of the miniature circuit breaker are the second width dimensions. The first width dimension is greater than the second width dimension.

10. A miniature circuit breaker with phase spacers according to claim 3, characterized in that: The third side surface is a stepped surface, including a first sub-surface, a second sub-surface, and a connecting surface. The connecting surface is perpendicular to and connected to both the first and second sub-surfaces, and the first and second sub-surfaces are parallel to each other. The mounting part has a first main body part located on the surface of the first sub-surface and a second main body part located on the surface of the connecting surface. The first partition part also includes a first outer partition part II and a first inner partition part II, and the second partition part also includes a second outer partition part II and a second inner partition part II. The first side surface and the second side surface have recessed portions near the connecting surface to accommodate the first inner partition part II and the second inner partition part II, respectively. In the height direction of the miniature circuit breaker, both the first outer partition part II and the second outer partition part II extend beyond the circuit breaker housing.

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