Drawer seat of universal circuit breaker

Abstract

The utility model discloses a universal circuit breaker drawer seat, which comprises two side plates, a bottom plate, a housing and a drawer base assembly, and is characterized in that the drawer base assembly, the bottom plate and the housing are fixed with the two side plates to form an installation space for accommodating a circuit breaker main body; wherein the top plate comprises a top panel, the top panel comprises a first area, the orthographic projection of an arc extinguish chamber of the circuit breaker main body on the top panel is located in the first area, and a plurality of aperture air leakage holes are formed in the first area; the cross sectional area of the air leakage hole is not smaller than 1 square millimeter but not larger than 4 pi square millimeters; the plurality of air leakage holes at least cover the ranges corresponding to all the arc extinguish chambers; the drawer seat has the characteristics of product temperature rise reduction, reliable assembly and fixation of the drawer seat and the like.

Description

Technical Field

[0001] The present application relates to the field of low-voltage electrical equipment and is a universal circuit breaker, in particular a drawer seat of a universal circuit breaker. Background Art

[0002] Universal circuit breakers, also known as frame circuit breakers, are mechanical switchgear that can connect, carry and disconnect currents under normal circuit conditions, and can also connect, carry for a certain time and disconnect currents under specified abnormal circuit conditions. Universal circuit breakers are used to distribute electrical energy and protect circuits and power equipment from overload, undervoltage, short circuit, etc.

[0003] Existing universal circuit breakers are mainly divided into two types, one is called a fixed universal circuit breaker, and the other is a drawer-type universal circuit breaker.

[0004] Taking the drawer-type universal circuit breaker as an example, it includes a drawer seat and a circuit breaker body. Since the circuit breaker body can be drawn out from the drawer seat, it is called a drawer-type universal circuit breaker.

[0005] The temperature rise of circuit breakers is a consideration in the design of low-voltage electrical products, and it is also a difficult point to break through. Especially in the fields of wind, light, electricity, storage, etc., there will also be dedicated drawer-type universal circuit breakers. For these fields, the temperature rise requirements for products will become higher and higher.

[0006] The existing drawer-type universal circuit breaker CN115798992A shows the relative relationship between the circuit breaker body and the drawer seat. The existing drawer seat often needs to be equipped with a cover to provide a certain protective effect on the circuit breaker body. However, the existing cover basically only has an exhaust channel on the side of the cover, and the outlet of the arc extinguishing cover of the circuit breaker body (which can be understood as the exhaust port of the circuit breaker body), the gas (including heat) discharged from the circuit breaker body is not easy to dissipate directly into the outside air through the exhaust channel, but needs to be "laterally moved" before dissipating into the air through the exhaust channel. The same is true for a universal circuit breaker with a new cover disclosed in CN213691909U, which also has such a problem.

[0007] The untimely discharge of this heat-containing gas is also one of the reasons for the high temperature rise of the circuit breaker body.

[0008] In summary, how to more reasonably design the drawer seat of the universal circuit breaker is also an issue that cannot be ignored in order to reduce the temperature rise of the circuit breaker. Summary of the invention

[0009] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a drawer seat for a universal circuit breaker.

[0010] The present application provides: a drawer seat of a universal circuit breaker, which includes two side panels, a bottom plate, a cover shell and a drawer base assembly, wherein the drawer base assembly, the bottom plate and the cover shell are all fixed to the two side plates to form an installation space for accommodating the circuit breaker body; wherein the top plate includes a top panel, the top panel includes a first area, the orthographic projection of the arc extinguishing chamber of the circuit breaker body on the top panel is within the first area, and a plurality of aperture air leakage holes are provided in the first area; the cross-sectional area of ​​the air leakage holes is not less than 1 square millimeter, but not greater than 4π square millimeters; the plurality of air leakage holes at least cover the range corresponding to all arc extinguishing chambers.

[0011] Compared with the prior art, the use of this structure and the opening of the vent holes on the top panel have the following beneficial effects: 1. Since the plurality of vent holes at least cover the range corresponding to all arc extinguishing chambers, that is, the air outlet holes of the arc extinguishing chambers can be directly aligned with the vent holes, the high-temperature gas from the circuit breaker body can flow into the air more directly through the vent holes, which can effectively reduce the temperature rise of the product. 2. The cross-sectional area of ​​the vent hole is not greater than 4π square millimeters. This design mainly takes into account the strength of the top panel and prevents large particles of foreign matter from entering the drawer seat through the vent holes, thereby improving the IP protection level.

[0012] In some embodiments of the present application, the air leakage holes are opened in the first area in a uniform manner.

[0013] With this structure, since the air leakage holes are evenly arranged, it is easier to automate the process.

[0014] In some embodiments of the present application, the first region has a second region directly corresponding to the arc extinguishing chamber outlet, and the density of the air leakage holes opened in the second region is greater than the density of the air leakage holes opened in the remaining regions of the first region.

[0015] With this structure, the setting of the vent holes is more targeted. By setting relatively dense (relative to the rest of the areas) vent holes in the second area, the main discharge of the high-temperature gas can be ensured. By setting relatively sparse (relative to the second area) vent holes in the rest of the areas, the number of openings on the top panel can be reduced, which can both assist in the discharge of the high-temperature gas and ensure strength.

[0016] In some embodiments of the present application, the air leakage hole includes a first opening located at the lower surface of the top panel, and a second opening located at the upper surface of the top panel, and a size of the first opening is larger than a size of the second opening.

[0017] With this structure, the first opening and the second opening of the exhaust hole are designed in this way, and the high-temperature gas from the arc extinguishing chamber is collected through the larger opening. As the size of the exhaust hole is reduced, the principle of the Laval nozzle is utilized to accelerate the gas discharge.

[0018] In some embodiments of the present application, the vent hole also includes a channel wall connected between the first opening and the second opening, and there is an arc transition surface between the first opening and the channel wall, and the arc transition surface can cause the gas flowing through to produce a Coanda effect.

[0019] This structure and the design of the arc transition surface can achieve the Coanda effect on the gas flowing through, guiding the gas to flow into the vent hole, which can reduce the kinetic energy loss of the gas as much as possible and facilitate gas discharge. (If there is no such guiding effect, the gases may impact each other, reducing the kinetic energy, which is not conducive to exhaust)

[0020] In some embodiments of the present application, the air leakage hole is an inclined hole, and an imaginary center line of the air leakage hole is arranged at an obtuse angle to the top panel.

[0021] With this structure, the design of the inclined hole will be more conducive to preventing foreign matter from falling in, while also achieving the effect of exhausting gas.

[0022] In some embodiments of the present application, the cross-sectional shape of the air leakage hole is one of a rectangle, a rhombus, a triangle, a circle, an ellipse and a regular polygon; or, the cross-sectional shape of the air leakage hole is an irregular shape.

[0023] As for the cross-sectional shape of the vent hole, it can be either a regular shape or an irregular shape. Either way, the gas can be discharged.

[0024] In some embodiments of the present application, the cover shell includes a front panel, which is connected to the top panel and is arranged at a right angle, the front panel is used to install the secondary terminal, a limiting hole is provided on the side panel, a limiting protrusion is provided on the front panel, and the limiting protrusion is inserted into the limiting hole.

[0025] With this structure, since the front panel is used to fix the secondary terminals, the front panel and the side panels are limited in this way, so that the front panel is more stable and the secondary terminals are easily assembled.

[0026] In some embodiments of the present application, the cover shell includes two side panels, which are connected to both sides of the top panel. The side panels are arranged at a right angle to the top panel. A first mounting hole is opened on the side panel, and a second mounting hole is opened on the side panel. The second mounting hole is larger than the first mounting hole. Fasteners pass through the second mounting hole and the first mounting hole to fix the side panels to the side panels.

[0027] With this structure, the second mounting hole is larger than the first mounting hole, which is conducive to the alignment of the two holes and facilitates the insertion of the bolt from the second mounting hole to achieve the fixing of the side plate and the side panel.

[0028] In some embodiments of the present application, the cover shell includes a rear panel, which is connected to the top panel and arranged at a right angle, and an exhaust passage is opened on the rear panel.

[0029] With this structure, the design of the exhaust passage can also achieve a certain gas exhaust effect.

[0030] In some embodiments of the present application, an assembly through slot is provided on the side panel, a handle is provided on the assembly through slot, and the handle is snap-connected to the assembly through slot.

[0031] By adopting this structure, the installation between the handle and the assembly slot can be more convenient.

[0032] In some embodiments of the present application, the assembly through groove includes a bottom groove wall, a top groove wall and two side groove walls, the bottom groove wall and the top groove wall are connected to each other through two side groove walls, a first abutment boss is provided on the bottom groove wall, and a second abutment boss is provided on the two side groove walls, the first abutment boss and the second abutment boss abut the handle piece from three directions; a clamping groove is provided on the handle piece, and the top groove wall is clamped in the clamping groove.

[0033] Through this specific installation method, the installation structure between the handle member and the assembly slot is very simple and reliable.

[0034] In some embodiments of the present application, at least two barbs are provided on the handle, and the barbs are hooked on the inner surface of the side panel.

[0035] Through this specific installation method, the installation structure between the handle member and the assembly slot is very simple and reliable.

[0036] In some embodiments of the present application, a rocker hole and an unlocking hole are provided on the bottom plate, and the unlocking hole is located on the left side of the rocker hole.

[0037] In the existing design, the unlocking hole is located on the right side of the rocker hole. With this structural setting, the rocker hole is used to allow the handle to be inserted into the circuit breaker body to rock in and out, and the unlocking hole is used to place the unlocking button. When the circuit breaker reaches a position (disconnection, test, connection, etc.), it is necessary to unlock it through the unlocking button. Generally, users are accustomed to rocking the handle with their right hand and unlocking with their left hand. Such an unlocking hole design makes it easier for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A three-dimensional diagram of a drawer seat of a universal circuit breaker according to an embodiment of the present application is shown;

[0040] Figure 2 An axial view and a partial enlarged view of a drawer seat of a universal circuit breaker according to an embodiment of the present application are shown;

[0041] Figure 3 The middle side plate of the drawer seat and a partial enlarged view of the universal circuit breaker in the embodiment of the present application are shown;

[0042] Figure 4 A schematic diagram showing the structure of a handle in a drawer seat of a universal circuit breaker according to an embodiment of the present application is shown;

[0043] Figure 5 An implementation of a top panel in a drawer seat of a universal circuit breaker in an embodiment of the present application is shown;

[0044] Figure 6 Another embodiment of the top panel in the drawer seat of the universal circuit breaker in the embodiment of the present application is shown;

[0045] Figure 7 An implementation of the air leakage hole in the top panel of the embodiment of the present application is shown;

[0046] Figure 8 Another embodiment of the air leakage hole in the top panel of the embodiment of the present application is shown;

[0047] Fig. 9 Another embodiment of the air leakage hole in the top panel of the embodiment of the present application is shown;

[0048] Fig.10 Another embodiment of the air leakage hole in the top panel of the embodiment of the present application is shown. DETAILED DESCRIPTION

[0049] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0052] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "electrically connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed electrical connection, a detachable electrical connection, or an integrated one; it can be a mechanical electrical connection, or an electrical electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. Example

[0054] like Figure 1-Figure 10 As shown, the embodiment of the present application is a drawer seat of a universal circuit breaker, and the drawer seat of the universal circuit breaker is also called a drawer seat of a drawer-type circuit breaker.

[0055] The drawer seat has an installation space 500 inside, which is used to accommodate the circuit breaker body. The installation space 500 is formed in this way: the drawer seat includes two side plates 100, a bottom plate 200, a cover 300 and a drawer base assembly 400. The bottom plate 200 is fixed to the lower ends of the two side plates 100, the cover 300 is fixed to the upper ends of the two side plates 100, and the drawer base assembly 400 is fixed to the rear ends of the two side plates 100, so that an installation space 500 is formed to accommodate the circuit breaker body.

[0056] The bottom plate 200 is used to set the rocking-in and rocking-out mechanism. The specific structure of the rocking-in and rocking-out mechanism here belongs to the well-known technology in this field and will not be described in detail here. The rocking-in and rocking-out mechanism is mainly achieved by inserting an external rocker into the rocker hole 201, and by shaking the rocker, the circuit breaker body is placed in the disconnection, testing, connection and other positions. Of course, each position needs to be unlocked by the unlocking button here. The unlocking structure here also belongs to the well-known technology in this field and will not be described in detail here. In order to make it easier for users to use, the unlocking hole 202 will be set on the left side of the rocker hole 201. For most people, they can use the right hand to rock the handle and the left hand to unlock. The two hands will not work crosswise like the prior art, making it easier for users to use.

[0057] The two side panels 100 are both mounted with handles 600 , and the mounting structures of the handles 600 are similar. Here, one of them is taken as an example, and the other one is in a mirror-symmetric relationship with it.

[0058] The handle 600 includes a mounting base 601 and an extension portion 602 extending toward the mounting space 500 . The extension portion 602 is a hollow knot to facilitate the user's hand or other carrying components to extend therein.

[0059] The side plate 100 is provided with an assembly through groove 101, which includes a bottom groove wall 102, a top groove wall 103 and two side groove walls 104. The bottom groove wall 102 is connected to the top groove wall 103 through the two side groove walls 104, and the bottom groove wall 102 and the top groove wall 103 are separated. A first abutting boss 102a is provided on the bottom groove wall 102, and the number of the first abutting bosses 102a is two. A second abutting boss 104a is provided on the two side groove walls 104. Through all the first abutting bosses 102a and the two second abutting bosses 104a, the three directions (the lower side and the two sides) of the extension part 602 can be abutted. A protruding rib 602a is provided on the extension part 602, and a clamping groove 603b is formed between the protruding rib 602a and the mounting base 601, and the clamping groove 603b is used to clamp with the top groove wall 103. Two barbs 604 are further provided on the mounting base 601 . The two barbs 604 are located near the two side groove walls 104 . The two barbs 604 are engaged with the inner surface of the side plate 100 .

[0060] The cover 300 includes a top panel 301, a front panel 302, two side panels 303, and a rear panel 304. The front panel 302, the side panels 303, and the rear panel 304 are all connected to the top panel 301 and are vertically arranged, but the directions of the front panel 302, the side panels 303, and the rear panel 304 on the top panel 301 are different.

[0061] The front panel 302 here is used to fix the secondary terminal. In order to increase the stability of the front panel 302, limiting protrusions 302a are provided on both sides of the front panel 302, and limiting holes 100a are opened on the two side panels 100, so that the limiting protrusions 302a can be inserted into the limiting holes 100a, thereby improving the connection strength and greatly facilitating the installation of the secondary terminal.

[0062] The rear panel 304 is provided with exhaust passages 304a, which can achieve a certain effect of exhausting gas. There are fourteen exhaust passages 304a, all of which are long waist hole-shaped. Of course, other shapes of exhaust passages 304a can also be used.

[0063] The side panel 303 is used to be fixed to the side panel 100. A first mounting hole 303a is provided on the side panel 303, and a second mounting hole 105 is provided on the side panel 100. The second mounting hole 105 is larger than the first mounting hole 303a, and the second mounting hole 105 includes the first mounting hole 303a, so that the fastener can pass through the second mounting hole 105 and the first mounting hole 303a in sequence to fix the side panel 100 to the side panel 303. The fastener is not shown, and the fastener here can be a bolt or a rivet.

[0064] The top panel 301 is also the surface closest to the arc extinguishing chamber of the circuit breaker body. If the orthographic projection of the arc extinguishing chamber of the circuit breaker body is taken as an example, there will be an area on the top panel 301 that includes these orthographic projections, and this area is the first area 301a.

[0065] Here, a plurality of air leakage holes 301b are provided in the first area 301a. The number of the air leakage holes 301b is very large. Figure 5 For example, the number of the vent holes 301b is more than 300. Here, the vent holes 301b must satisfy at least covering the range corresponding to all arc extinguishing chambers. The drawer seat of this embodiment corresponds to three arc extinguishing chambers of the circuit breaker body. All the vent holes 301b must at least cover the range corresponding to these three arc extinguishing chambers on the first area 301a (it can also be said to cover). Here, the cross-sectional area of ​​the vent holes 301b is 4π square millimeters. Of course, it is not limited to this cross-sectional area, as long as it is not less than 1 square millimeter, but not more than 4π square millimeters. Through the design of such vent holes 301b, the air outlet from the arc extinguishing chamber can be directly aligned with the vent holes 301b, so that the high-temperature gas can flow into the air more directly through the vent holes 301b, while taking into account the strength of the top panel 301 and improving the IP protection level.

[0066] As a way, Figure 5 As shown, the air leakage holes 301b are evenly arranged in the entire first area 301a, so that all arc extinguishing chambers can be covered.

[0067] As another embodiment, Figure 6 As shown, although the number of the vent holes 301b is less than the previous one, the vent holes 301b of this embodiment are more concentrated in the second area 301c in the first area 301a, and are relatively sparse in other areas in the first area 301a. The second area 301c here is directly opposite to the outlet S of the arc extinguishing chamber.

[0068] In the above embodiments, the cross-sectional shape of the vent hole 301b is circular. Of course, in addition to the circle, it can also be a rectangle, rhombus, triangle, circle, ellipse, regular polygon, or an irregular shape, as long as it can meet the effect of exhausting gas.

[0069] Regardless of the arrangement of the vent holes 301b, the vent holes 301b can be either vertical holes or inclined holes.

[0070] Take the obtuse angle method as an example, Figure 8As shown, the vent hole 301b is an inclined hole, and the imaginary center line P of the vent hole 301b is set at an obtuse angle with the top panel 301. The opening of the vent hole 301b on the lower surface of the top panel 301 is a first opening 3011, and the opening on the upper surface of the top panel 301 is a second opening 3012.

[0071] Take the vertical hole as an example, Figure 7 As shown, the air leakage hole 301b includes a first opening 3011, a second opening 3012 and a channel wall 3013, and the channel wall 3013 connects the first opening 3011 with the second opening 3012, and the channel wall 3013 is perpendicular to the top panel 301. The opening of the air leakage hole 301b on the lower surface of the top panel 301 is the first opening 3011, and the opening on the upper surface of the top panel 301 is the second opening 3012.

[0072] Regardless of which of the above opening methods is used, in order to facilitate the discharge of gas, the size of the first opening 3011 is larger than the size of the second opening 3012, so that a Laval nozzle can be formed, which can have a certain acceleration effect on the gas flowing through the vent hole 301b.

[0073] Regardless of which of the above-mentioned opening methods is used, in order to facilitate the gas to flow into the leak hole 301b, an arc transition surface 3014 is provided between the first opening 3011 and the channel wall 3013. The arc transition surface 3014 can cause the gas flowing therethrough to produce a Coanda effect, so that the gas flowing therethrough can more easily enter the leak hole 301b along the surface, thereby reducing the decrease in gas kinetic energy due to the collision between gases.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0075] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A universal circuit breaker drawer seat, comprising two side plates, a bottom plate, a cover and a drawer base assembly, wherein the drawer base assembly, the bottom plate and the cover are fixed to the two side plates to form an installation space for accommodating the circuit breaker body; characterized in that: The top plate includes a top panel, which includes a first area. The orthographic projection of the arc extinguishing chamber of the circuit breaker body on the top panel is within the first area. A plurality of air leakage holes with apertures are provided in the first area. The cross-sectional area of ​​the air leakage holes is not less than 1 square millimeter but not greater than 4π square millimeters. The plurality of air leakage holes at least cover the range corresponding to all arc extinguishing chambers.

2. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: The leakage holes are uniformly arranged in the first area; or, the first area has a second area directly corresponding to the arc extinguishing chamber outlet, and the density of the leakage holes arranged in the second area is greater than the density of the leakage holes arranged in the remaining areas of the first area.

3. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: The air leakage hole includes a first opening located on the lower surface of the top panel and a second opening located on the upper surface of the top panel, and a size of the first opening is larger than a size of the second opening.

4. The drawer seat of the universal circuit breaker according to claim 3, characterized in that: The gas leakage hole also includes a channel wall connected between the first opening and the second opening, and a circular arc transition surface is formed between the first opening and the channel wall. The circular arc transition surface can cause the gas flowing through to produce a Coanda effect.

5. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: The air leakage hole is an inclined hole, and an imaginary center line of the air leakage hole is arranged at an obtuse angle to the top panel.

6. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: The cross-sectional shape of the air leakage hole is one of a rectangle, a rhombus, a triangle, a circle, an ellipse and a regular polygon; or the cross-sectional shape of the air leakage hole is an irregular shape.

7. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: The housing comprises a front panel, which is connected to the top panel and arranged at a right angle, and is used to install the secondary terminal. The side panel is provided with a limiting hole, and a limiting protrusion is arranged on the front panel, and the limiting protrusion is inserted into the limiting hole. And / or, the housing includes two side panels, the two side panels are connected to both sides of the top panel, the side panels are arranged at a right angle to the top panel, a first mounting hole is opened on the side panel, a second mounting hole is opened on the side panel, the second mounting hole is larger than the first mounting hole, and a fastener passes through the second mounting hole and the first mounting hole to fix the side panel to the side panel; And / or, the cover shell includes a rear panel, which is connected to the top panel and arranged at a right angle, and an exhaust passage is opened on the rear panel.

8. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: An assembly through slot is provided on the side plate, a handle is provided on the assembly through slot, and the handle is clamped with the assembly through slot.

9. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: The assembly through groove comprises a bottom groove wall, a top groove wall and two side groove walls, the bottom groove wall and the top groove wall are connected through the two side groove walls, the bottom groove wall is provided with a first abutting boss, the two side groove walls are provided with a second abutting boss, the first abutting boss and the second abutting boss abut the handle piece from three directions; the handle piece is provided with a clamping groove, the top groove wall is clamped in the clamping groove; And / or, the handle is provided with at least two barbs, which are hooked on the inner surface of the side plate.

10. The drawer seat of the universal circuit breaker according to claim 1, characterized in that: A rocker hole and an unlocking hole are arranged on the bottom plate, and the unlocking hole is located on the left side of the rocker hole.

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