CN220476149U - Ladder buckle and electric installation structure - Google Patents

Abstract

The utility model provides a ladder buckle and an electric installation structure, wherein the ladder buckle comprises: a connection part connected with the equipment to be installed; one end of the elastic part is arranged on the connecting part and is used for providing clamping elastic force; the step part comprises a plurality of abutting steps which are arranged in sequence in a step manner; the abutting step is used for abutting and matching with the outer plate; one abutting step connected with the elastic part is an initial step, and the abutting step farthest from the elastic part is a final step; the gap between the initial step and the connecting part is an initial gap, the gap between the final step and the connecting part is a final gap, and the final gap is larger than the initial gap. The utility model ensures that the equipment to be installed is convenient and quick to assemble and disassemble on the external plate, and avoids the problems of safety accidents and equipment damage; through setting up the ladder portion, guaranteed the outside plate of the different thickness of effective adaptation when the ladder buckle is installed, and then improved the suitability of ladder buckle.

Description

Ladder buckle and electric installation structure

Technical Field

The utility model relates to the technical field of electric equipment installation, in particular to a ladder buckle and an electric installation structure.

Background

Currently, in the prior art, for installation of electrical products such as optimizers, turners, micro-inverters and the like, a snap-fit installation mode or a fastening (for example, screws) installation mode is generally needed; compared with the fastener installation mode, the fastener installation mode has the advantages of convenience and rapidness in disassembly, but due to the fact that the weight of an electric product is relatively heavy and the size is relatively large, the reliability of installation by adopting a traditional fastener can be insufficient, and the installed product can fall off, so that safety accidents and equipment damage are caused; in addition, the electrical product is usually mounted in a relatively changeable position, for example: the problems that the installation of the clamping connection cannot be realized or the clamping connection is not firm possibly occur when the traditional clamping buckle is adopted for installation due to the fact that the thicknesses of the frames and the thin plates at all positions are different.

In summary, for the installation of products with relatively heavy weight and relatively large size, the reliability and applicability of the buckle installation are the problems to be solved urgently at present.

Disclosure of Invention

The utility model provides a ladder buckle and an electric installation structure, which are used for solving the problems that the buckle in the prior art is not firm for equipment clamping installation and can not be effectively adapted to installation positions with different thicknesses during installation.

In order to solve the above-described problems, according to an aspect of the present utility model, there is provided a step buckle for snap-fixing a device to be mounted on an external board, the step buckle comprising: a connection part connected with the equipment to be installed; one end of the elastic part is arranged on the connecting part and is used for providing clamping elastic force; the step part comprises a plurality of abutting steps which are arranged in sequence in a step manner; the abutting step is used for abutting and matching with the outer plate; one abutting step connected with the elastic part is an initial step, and the abutting step farthest from the elastic part is a final step; the gap between the initial step and the connecting part is an initial gap, the gap between the final step and the connecting part is a final gap, and the final gap is larger than the initial gap.

Further, the abutting step is provided with an abutting surface, the abutting surface abuts against the outer plate, and the abutting surface is a plane.

Further, the elastic part is of an arc-shaped structure, and the arc-shaped structure is used for providing clamping elastic force for the abutting step so that the abutting step is in abutting fit with the outer plate.

Further, the connection portion has a mounting through hole penetrating the connection portion, and an external fastener is fitted with the mounting through hole to fix the connection portion to the device to be mounted or other external structure.

Further, the elastic part is provided with a through hole, the through hole penetrates through the elastic part, the external fastener sequentially penetrates through the through hole and the mounting through hole, and the external fastener is in abutting fit with the elastic part.

Further, the step buckle further comprises a barb portion, one end of the barb portion is arranged on the abutting step, and the other end of the barb portion is used for abutting against the outer plate to prevent the step buckle from being separated from the outer plate.

Further, the extending direction of the barb portion forms a first vector, and when the step buckle is mounted on the outer plate, the outer plate forms a second vector with respect to the moving direction of the step buckle, and an included angle between the first vector and the second vector is an acute angle.

Further, the number of the barb portions is plural, and the plural barb portions are provided at intervals on at least one abutment step.

According to another aspect of the present utility model, there is provided an electrical installation structure including the step buckle described above, the electrical installation structure further including an assembly buckle including a connection structure, an elastic structure and a barb structure, the connection structure being connected with a device to be installed; one end of the elastic structure is arranged on the connecting structure and used for providing clamping elastic force; one end of the barb structure is arranged at the other end of the elastic structure, and the other end of the barb structure is used for being abutted with the external plate so as to prevent the assembly buckle from being separated from the external plate; the assembly buckle and the step buckle are at least one and are respectively connected with equipment to be installed so as to jointly fix the equipment to be installed on an external plate in a clamping way.

Further, the assembly buckle is provided with two symmetrically arranged barb structures, and the barb structures are formed by cutting and bending a part of the elastic structures; the extending direction of the barb structure forms a third vector, when the assembly buckle is installed on the outer plate, the outer plate forms a fourth vector relative to the moving direction of the assembly buckle, and an included angle between the third vector and the fourth vector is an acute angle.

Further, the outer plate is a frame, the frame is provided with a first edge and a second edge which are adjacent to each other, and the equipment to be installed is provided with a third edge and a fourth edge which are adjacent to each other; the plurality of assembly buckles are arranged, and at least one assembly buckle is arranged on the third side and is in clamping fit with the first side; the at least one step buckle is arranged on the fourth side and is in clamping fit with the second side; the extending direction of the elastic structure of the assembly buckle and the extending direction of the elastic part of the step buckle form an included angle.

By applying the technical scheme of the utility model, the utility model provides a ladder buckle, which is used for clamping and fixing equipment to be installed on an external plate, and comprises the following components: a connection part connected with the equipment to be installed; one end of the elastic part is arranged on the connecting part and is used for providing clamping elastic force; the step part comprises a plurality of abutting steps which are arranged in sequence in a step manner; the abutting step is used for abutting and matching with the outer plate; one abutting step connected with the elastic part is an initial step, and the abutting step farthest from the elastic part is a final step; the gap between the initial step and the connecting part is an initial gap, the gap between the final step and the connecting part is a final gap, and the final gap is larger than the initial gap. According to the utility model, the equipment to be installed can be effectively clamped and fixed on the external plate by arranging the step buckle, and the convenience and rapidness in dismounting the equipment to be installed on the external plate are ensured; the elastic part is arranged to provide clamping elastic force, so that the reliability of the ladder buckle during installation is ensured, the falling-off phenomenon of equipment to be installed is avoided, and further, the problems of safety accidents and equipment damage are avoided; by arranging the step part, the step buckle is ensured to be effectively matched with external plates with different thicknesses during installation, and the applicability of the step buckle is further improved; the ladder buckle provided by the utility model can be used in combination with the traditional buckle, so that the reliability and safety of buckle installation are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view showing a part of the structure of an electrical mounting structure provided by an embodiment of the present utility model;

fig. 2 is a schematic diagram showing a specific structure of a step buckle according to an embodiment of the present utility model;

FIG. 3 shows a schematic diagram of the engagement of a step buckle on a device to be installed provided by an embodiment of the present utility model;

FIG. 4 is a schematic diagram showing a specific structure of an assembly buckle according to an embodiment of the present utility model;

fig. 5 shows a schematic view of the fitting buckle on the device to be mounted with the external plate provided by the embodiment of the utility model;

fig. 6 shows a schematic view of the step buckle provided by the embodiment of the utility model on the device to be installed and matched with the external plate.

Wherein the above figures include the following reference numerals:

10. equipment to be installed; 11. a third side; 12. fourth side;

20. an outer plate member; 21. a first edge; 22. a second side;

30. a connection part; 31. mounting through holes;

40. an elastic part;

50. a step part; 51. abutting the step; 52. an abutment surface;

60. assembling a buckle; 61. a connection structure; 62. an elastic structure; 63. a barb structure; 64. a third vector; 65. and a fourth vector.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 6, an embodiment of the present utility model provides a step buckle for snap-fastening a device 10 to be mounted on an outer plate 20, the step buckle comprising:

a connection part 30 connected with the apparatus 10 to be mounted;

an elastic part 40 having one end provided on the connection part 30 for providing a clamping elastic force;

a step portion 50, the step portion 50 including a plurality of abutment steps 51 arranged stepwise in sequence; the abutment step 51 is for abutment engagement with the outer panel 20; one abutment step 51 connected with the elastic portion 40 is a start step, and one abutment step 51 farthest from the elastic portion 40 is a final step;

the gap between the initial step and the connecting portion 30 is an initial gap, and the gap between the final step and the connecting portion 30 is a final gap, which is larger than the initial gap.

According to the utility model, the equipment 10 to be installed can be effectively clamped and fixed on the external plate 20 by arranging the step buckle, and the convenience and rapidness in dismounting the equipment 10 to be installed on the external plate 20 are ensured; the elastic part 40 is arranged to provide clamping elastic force, so that the reliability of the ladder buckle during installation is ensured, the falling-off phenomenon of the equipment 10 to be installed is avoided, and further the problems of safety accidents and equipment damage are avoided; by arranging the step part 50, the step buckle is ensured to be effectively matched with the external plate 20 with different thickness during installation, and the applicability of the step buckle is further improved; the ladder buckle provided by the utility model can be used in combination with the traditional buckle, so that the reliability and safety of buckle installation are improved.

It should be noted that: the connection manner of the connection portion 30 and the apparatus 10 to be mounted includes, but is not limited to, the following ways: 1. the equipment 10 to be installed is provided with a clamping groove, the connecting part 30 is inserted into the clamping groove and matched with the inner wall of the clamping groove, and is fixedly connected in a clamping way (for example, the extending direction of the clamping groove is the horizontal direction, the connecting part 30 is inserted into the clamping groove along the horizontal direction and matched with the upper inner wall of the clamping groove, so as to finish the fixed connection); 2. the connecting part 30 is fixedly connected with the equipment 10 to be installed in an adhesive or welding mode, which is simple and reliable, and of course, compared with the mode 1, the mode 2 cannot realize quick disassembly and separation between the connecting part 30 and the equipment 10 to be installed, so that the connecting part is flexibly arranged according to actual use requirements; 3. in some usage scenarios, the connecting portion 30 may be integrally formed with the device to be installed 10 by injection molding or casting, that is, directly machined (e.g., cut, bent, forged, etc.) on the device to be installed 10 to form a step buckle.

As shown in fig. 2, the abutment step 51 has an abutment surface 52, the abutment surface 52 abuts against the outer panel 20, and the abutment surface 52 is a plane. By providing the abutment surface 52 as a plane, the area of abutment contact between the abutment step 51 and the outer plate 20 is ensured to be large enough, and the clamping firmness is improved.

It should be noted that: in one embodiment of the present utility model, the abutment steps 51 are equal to or greater than three, and the gaps between the adjacent two abutment steps 51 and the connecting portion 30 are gradually increased in the direction from the start step to the final step to accommodate the outer plate members 20 of different thicknesses.

As shown in fig. 1, 2 and 6, the elastic portion 40 has an arc structure for providing a clamping elastic force to the abutment step 51 so that the abutment step 51 is in abutting engagement with the outer plate 20. By arranging the arc-shaped structure, the clamping force of the ladder buckle is ensured to meet the actual use requirement; in actual use, the size and the direction of the clamping force can be controlled by setting the specific size and the material of the arc-shaped structure, so that the suitability and the universality of the ladder buckle are further improved.

As shown in fig. 3, the connection part 30 has a mounting through hole 31 thereon, the mounting through hole 31 penetrates the connection part 30, and an external fastener (e.g., a screw) is engaged with the mounting through hole 31 to fix the connection part 30 to the apparatus 10 to be mounted or other external structure. Through setting up installation through-hole 31, the ladder buckle of being convenient for can follow-up nimble installation as required.

In one embodiment of the present utility model, after the electrical mounting structure is mounted, a screw is passed through the mounting through hole 31 to connect the step buckle with the external mounting bracket to further reinforce the electrical mounting structure.

Specifically, the elastic portion 40 has a through hole, the through hole penetrates the elastic portion 40, the external fastener sequentially passes through the through hole and the mounting through hole 31, and the external fastener (for example, a screw) is in abutting fit with the elastic portion 40. By arranging the external fastener to be in abutting fit with the elastic part 40, the external fastener can effectively restrict the deformation of the elastic part 40, and the equipment 10 to be installed is prevented from falling off due to the fact that the elastic part 40 is suddenly opened when being impacted by external force; in practical use, after the electrical installation structure is installed, the screws can be adopted to pass through the through holes and the installation through holes 31 and be in threaded connection with the equipment 10 to be installed or other external structures, so as to limit the elastic part 40 and the step buckle at the same time.

Optionally, the step buckle further includes a barb portion, one end of which is disposed on the abutment step 51, and the other end of which is adapted to abut against the outer panel 20, so as to prevent the step buckle from being separated from the outer panel 20. Through setting up the barb portion, effectively prevented that ladder buckle and outside plate 20 from breaking away from, and then improved the firm degree of joint.

Specifically, the extending direction of the barb portion forms a first vector, and when the step buckle is mounted on the outer plate 20, the outer plate 20 forms a second vector with respect to the moving direction of the step buckle, and the angle between the first vector and the second vector is acute (similar to the angle between the third vector 64 and the fourth vector 65 in fig. 4). By setting the included angle between the first vector and the second vector to be an acute angle (i.e. forming a structure which is convenient for unidirectional passage and prevents reverse movement), the insertion and installation of the outer plate 20 relative to the step buckle are facilitated, and the step buckle can be effectively prevented from being separated from the outer plate 20; when the step buckle needs to be separated from the outer plate 20, the barb part is lifted by external force, so that the quick disassembly can be realized.

Specifically, the number of the barbs is plural, and the plural barbs are provided at intervals on at least one abutment step 51. The firm degree of joint has further been improved in this setting.

As shown in fig. 1, 4, 5 and 6, the present utility model further provides an electrical installation structure, which includes the above-mentioned step buckle, and the electrical installation structure further includes an assembly buckle 60, as shown in fig. 4, the assembly buckle 60 includes a connection structure 61, an elastic structure 62 and a barb structure 63, and the connection structure 61 is connected with the device 10 to be installed; one end of the elastic structure 62 is arranged on the connecting structure 61 and is used for providing clamping elastic force; one end of the barb structure 63 is disposed on the other end of the elastic structure 62, and the other end of the barb structure 63 is used for abutting against the outer plate 20 to prevent the assembly buckle 60 from being separated from the outer plate 20; wherein, the assembly buckle 60 and the step buckle are at least one, and the assembly buckle 60 and the step buckle are respectively connected with the equipment to be installed 10 to jointly fix the equipment to be installed 10 on the external plate 20 in a clamping manner. Through setting up assembly buckle 60 and ladder buckle cooperation work, both be convenient for wait the installation of erection equipment 10, guaranteed joint firm degree again.

It should be noted that: the connection manner of the connection structure 61 and the apparatus 10 to be mounted includes, but is not limited to, the following ways (similar to the connection manner of the connection portion 30 and the apparatus 10 to be mounted described above): 1. the equipment 10 to be installed is provided with a clamping groove, the connecting structure 61 is inserted into the clamping groove and matched with the inner wall of the clamping groove, and is fixedly connected in a clamping way (for example, the extending direction of the clamping groove is the horizontal direction, the connecting structure 61 is inserted into the clamping groove along the horizontal direction and matched with the upper inner wall of the clamping groove, and the fixed connection is completed); 2. the connection structure 61 is fixedly connected with the equipment 10 to be installed by bonding or welding, which is simple and reliable, and of course, compared with the mode 1, the mode 2 cannot realize quick disassembly and separation between the connection structure 61 and the equipment 10 to be installed, so that the connection structure 61 is flexibly arranged according to actual use requirements; 3. in some use cases, the connecting structure 61 may be integrally formed with the device 10 to be installed by injection molding or casting, that is, the assembling buckle 60 is directly formed on the device 10 to be installed (for example, by cutting, bending, forging, etc.).

As shown in fig. 4 and 5, the fitting buckle 60 has two symmetrically disposed barb structures 63, and the barb structures 63 are formed by cutting and bending a portion of the elastic structures 62; as shown in fig. 4, the extension direction of barb structures 63 forms a third vector 64, and when mounting clip 60 on outer panel 20, outer panel 20 forms a fourth vector 65 with respect to the direction of movement of mounting clip 60, with the angle between third vector 64 and fourth vector 65 being acute.

By arranging the barb structures 63 to be formed by cutting and bending a part of the elastic structures 62, the barb structures 63 are ensured to be easy to process and form, and the processing cost is reduced; by setting the included angle between the third vector 64 and the fourth vector 65 to be an acute angle (i.e., forming a structure that facilitates unidirectional passage and prevents reverse movement), the insertion and installation of the outer plate 20 relative to the assembly buckle 60 are facilitated, and the assembly buckle 60 is effectively prevented from being separated from the outer plate 20; when the assembly buckle 60 needs to be separated from the outer plate 20, the barb structure 63 is lifted by external force, so that quick disassembly can be realized.

As shown in fig. 1, the outer plate 20 is a frame having adjacent first and second sides 21, 22, and the device 10 to be mounted has adjacent third and fourth sides 11, 12; the assembly buckles 60 are multiple, and at least one assembly buckle 60 is arranged on the third side 11 and is in clamping fit with the first side 21; at least one step buckle is arranged on the fourth side 12 and is matched with the second side 22 in a clamping way; the extending direction of the elastic structure 62 of the assembling buckle 60 forms an included angle with the extending direction of the elastic portion 40 of the step buckle.

By arranging the elastic structure 62 of the assembling buckle 60 to have an included angle (for example, 90-degree included angle) with the extending direction of the elastic part 40 of the step buckle, the installation of the equipment 10 to be installed on the frame is facilitated, and the clamping firmness is ensured.

Notably, are: when the size of the device 10 to be installed is large or the weight is heavy, the clamping force of the assembly buckle 60 is insufficient to support the weight of the device 10 to be installed and the bending moment born by the device, and the assembly buckle 60 is likely to fail, at this time, by arranging the step buckle, the step buckle can effectively support the device 10 to be installed in the direction perpendicular to the assembly buckle 60, so that the device 10 to be installed is prevented from applying the bending moment to the assembly buckle 60, and the reliability and the safety of the electrical installation structure are greatly improved.

In one embodiment of the utility model, as shown in fig. 1 and 2, the step catch has no barb and the step catch has an abutment surface 52. The fixed installation mode between the step buckle and the equipment 10 to be installed is not limited (such as clamping, threaded connection and the like); the main reason why the step buckle is not provided with the barb portion is that: assuming that the step buckle has a barb portion, if the assembling buckle 60 has a barb structure, the assembling buckle 60 and the frame are clamped and installed first, the clamping force of the assembling buckle 60 limits the installation of the barb portion of the step buckle, and the same is true, if the step buckle and the frame are clamped and installed first, the clamping force of the step buckle limits the installation of the barb structure of the assembling buckle 60, so that the advantage of quick and convenient installation in buckle installation is lost; therefore, the step buckle is not designed with a barb portion, and is further convenient for quick installation (certainly, due to lack of the barb portion, some clamping strength is also reduced).

It should be noted that: in another embodiment of the present utility model, not shown, the number of the abutment steps 51 of the step buckle is not limited, and can be flexibly adjusted according to the thickness and the type of the outer plate 20, if the frame is only one, the step buckle can only have one abutment step 51; the number of the assembly buckles 60 and the step buckles is not limited, and the positions and the sizes of the assembly buckles 60 and the step buckles mounted on the equipment 10 to be mounted are not limited, and only the assembly buckles 60 and the step buckles are guaranteed not to be mounted in the same direction of the equipment 10 to be mounted at the same time; the structure, shape, size, material, etc. of the apparatus 10 to be mounted are not limited. The form of the fixed mounting of the fitting buckle 60 with the apparatus 10 to be mounted is not limited, for example: the assembly buckle 60 can be installed on the equipment 10 to be installed in a clamping installation mode, a screw mode or a welding mode; the mounting form of the step buckle and the device to be mounted 10 is not limited, for example: the assembly buckle 60 can be installed on the equipment 10 to be installed in a clamping installation mode, a screw mode or a welding mode; the material, shape and size of the assembly clasp 60 are not limited; the materials, the shapes and the sizes of the step buckles are not limited; can be flexibly set according to the actual use requirement.

In summary, the present utility model provides a step buckle and an electrical installation structure, which can effectively clamp and fix a device 10 to be installed on an external plate 20 by providing the step buckle, and ensure that the device 10 to be installed is convenient and fast to be dismounted on the external plate 20; the elastic part 40 is arranged to provide clamping elastic force, so that the reliability of the ladder buckle during installation is ensured, the falling-off phenomenon of the equipment 10 to be installed is avoided, and further the problems of safety accidents and equipment damage are avoided; by arranging the step part 50, the step buckle is ensured to be effectively matched with the external plate 20 with different thickness during installation, and the applicability of the step buckle is further improved; the ladder buckle provided by the utility model can be used in combination with the traditional buckle, so that the reliability and safety of buckle installation are improved.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (11)

1. A step buckle, characterized in that it is used for fixing the equipment (10) joint that waits to install on outside plate (20), the step buckle includes:

a connection part (30) connected with the equipment (10) to be installed;

an elastic part (40), one end of which is arranged on the connecting part (30) and is used for providing clamping elastic force;

a step part (50), wherein the step part (50) comprises a plurality of abutting steps (51) which are arranged in sequence in a step manner; the abutment step (51) is adapted to be in abutment engagement with the outer plate (20); -one abutment step (51) connected to the spring (40) is a starting step and one abutment step (51) furthest from the spring (40) is a final step; the gap between the initial step and the connecting portion (30) is an initial gap, the gap between the final step and the connecting portion (30) is a final gap, and the final gap is larger than the initial gap.

2. The step catch according to claim 1, characterized in that the abutment step (51) has an abutment surface (52), the abutment surface (52) being in abutment with the outer plate (20), the abutment surface (52) being planar.

3. The step buckle according to claim 1, wherein the elastic portion (40) is an arc-shaped structure for providing the engagement elastic force to the abutment step (51) so that the abutment step (51) is in abutting engagement with the outer plate (20).

4. The step buckle according to claim 1, characterized in that the connecting part (30) is provided with a mounting through hole (31), the mounting through hole (31) penetrates through the connecting part (30), and an external fastener is matched with the mounting through hole (31) to fix the connecting part (30) on the equipment (10) to be mounted or other external structures.

5. The ladder buckle according to claim 4, characterized in that the elastic part (40) is provided with a through hole, the through hole penetrates through the elastic part (40), the external fastener sequentially penetrates through the through hole and the mounting through hole (31), and the external fastener is in abutting fit with the elastic part (40).

6. The step buckle according to claim 1, further comprising a barb portion, one end of which is provided on the abutment step (51), the other end of which is adapted to abut against the outer panel (20) to prevent the step buckle from being detached from the outer panel (20).

7. The step buckle according to claim 6, wherein the extending direction of the barb portion forms a first vector, and wherein the outer plate (20) forms a second vector with respect to the moving direction of the step buckle when the step buckle is mounted on the outer plate (20), and wherein an included angle of the first vector and the second vector is an acute angle.

8. The step buckle according to claim 6, wherein the number of the barb portions is plural, and the plural barb portions are provided at intervals on at least one abutment step (51).

9. An electrical installation structure, characterized in that it comprises a step catch according to any one of claims 1 to 8, said electrical installation structure further comprising an assembly catch (60), said assembly catch (60) comprising a connection structure (61), a resilient structure (62) and a barb structure (63), said connection structure (61) being connected with said device (10) to be installed; one end of the elastic structure (62) is arranged on the connecting structure (61) and is used for providing clamping elastic force; one end of the barb structure (63) is arranged on the other end of the elastic structure (62), and the other end of the barb structure (63) is used for abutting against the outer plate (20) so as to prevent the assembling buckle (60) from being separated from the outer plate (20); the assembly buckle (60) and the step buckle are at least one, and the assembly buckle (60) and the step buckle are respectively connected with the equipment (10) to be installed so as to jointly fix the equipment (10) to be installed on the external plate (20) in a clamping mode.

10. The electrical installation structure according to claim 9, characterized in that the fitting clasp (60) has two symmetrically arranged barb structures (63), the barb structures (63) being formed by cutting and bending from a portion of the spring structure (62); the extending direction of the barb structure (63) forms a third vector (64), when the assembly buckle (60) is installed on the outer plate (20), the outer plate (20) forms a fourth vector (65) relative to the moving direction of the assembly buckle (60), and an included angle between the third vector (64) and the fourth vector (65) is an acute angle.

11. The electrical installation according to claim 9, characterized in that the outer plate (20) is a frame having adjacent first (21) and second (22) edges, the device (10) to be installed having adjacent third (11) and fourth (12) edges; the plurality of assembly buckles (60) are arranged, and at least one assembly buckle (60) is arranged on the third side (11) and is in clamping fit with the first side (21); at least one step buckle is arranged on the fourth side (12) and is matched with the second side (22) in a clamping way; the extending direction of the elastic structure (62) of the assembly buckle (60) and the extending direction of the elastic part (40) of the step buckle form an included angle.