Profile frame

Abstract

The utility model discloses a section bar frame which comprises a section bar and an inner corner piece, the section bar comprises a first section bar extending along a first direction, a second section bar extending along a second direction and a third section bar extending along a third direction, the first profile, the second profile and the third profile are each provided with first holes and second holes which are arranged in a staggered mode at equal intervals in the extending direction of the first profile, the second profile and the third profile. The inner corner piece is provided with a third hole corresponding to the first hole and a fourth hole corresponding to the second hole, and the first connecting piece penetrates through the corresponding first hole and the third hole and / or the corresponding second hole and the fourth hole to connect adjacent profiles to form a frame; the distance between the first hole and the second hole is unified, two different first connecting pieces can be adopted to achieve at least two fixing modes, the connecting positions of the first sectional material, the second sectional material and the third sectional material can be adjusted to form different frames, the flexibility of sectional material assembly is improved, the inner corner piece has universality, and sectional material assembly is easy.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cabinet body structure, especially relates to a sectional frame. BACKGROUND

[0002] With the rapid development of current mechanical industry, the scene of using sectional frame is more and more, and it is often necessary to assemble sectional material into frame, and the frame is removed and transferred after use for the use of next scene.

[0003] In the process of implementing the present application, the inventor found that the prior art at least has the following problems: the existing sectional frame installation mode is single, can only be installed and removed through a specific way, cannot flexibly change the installation mode of sectional material according to the demand of use scene, leading to poor universality of sectional material, low assembly and disassembly efficiency.

[0004] Therefore, how to provide a sectional frame to improve the above-mentioned disadvantages is a technical problem that technicians in the field need to solve at present. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a sectional frame, which can adopt at least two fixing modes, can adjust the connection position to form different frames, can improve the flexibility of sectional material assembly, is easy to assemble sectional material, and can improve the problems of poor universality of sectional material and low assembly and disassembly efficiency in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a sectional frame, comprising:

[0007] Sectional material, comprising a first sectional material extending along a first direction, a second sectional material extending along a second direction, and a third sectional material extending along a third direction, the first sectional material, the second sectional material and the third sectional material are all provided with first holes and second holes staggered and arranged at equal intervals along the extension direction of the sectional material;

[0008] Internal corner piece, provided with third holes corresponding to the first holes and fourth holes corresponding to the second holes, the first connecting piece is arranged in the corresponding first holes and third holes and / or the corresponding second holes and fourth holes to connect adjacent sectional materials to form a frame;

[0009] Any one of the first direction, the second direction and the third direction is perpendicular to the other two.

[0010] In a possible design, further comprising an external corner piece, the external corner piece is provided with three mounting parts, the three mounting parts can be respectively attached to the first sectional material, the second sectional material and the third sectional material, and the mounting part is provided with fifth holes corresponding to the first holes and sixth holes corresponding to the second holes, and the second connecting piece is arranged in the corresponding first holes and fifth holes and / or the corresponding second holes and sixth holes to connect adjacent sectional materials.

[0011] In a possible design, the first hole, the third hole and the fifth hole are square holes with the same cross-sectional size perpendicular to the extending direction of the square hole, and the second hole, the fourth hole and the sixth hole are circular holes with the same cross-sectional size perpendicular to the extending direction of the circular hole.

[0012] In a possible design, the first connecting member and / or the second connecting member each include an abutting portion and a connecting portion connected to the abutting portion, the connecting portion is located at one end of the abutting portion and can be arranged in the square hole, the connecting portion is provided with a clamping portion with elastic deformation, and the clamping portion and the abutting portion each can abut against the end surface of the square hole to limit the relative movement of the connecting member and the square hole after clamping.

[0013] In a possible design, the clamping portion is provided with a guide surface away from the connecting portion, and the distance between the end of the guide surface away from the abutting portion and the connecting portion is smaller than the distance between the end of the guide surface close to the abutting portion and the connecting portion.

[0014] In a possible design, the square hole of the first profile, the second profile and the third profile is provided with a clamping nut, and the first connecting member and / or the second connecting member is specifically a screw matched with the clamping nut.

[0015] In a possible design, the first connecting member and / or the second connecting member is specifically a rivet or a self-tapping screw which can be arranged in the circular hole.

[0016] In a possible design, the first profile, the second profile and the third profile are six-fold edge profiles including five inner corners, and the six-fold edge profile includes a first extending segment, a second extending segment, a first fold edge, a second fold edge, a third fold edge and a third extending segment connected in sequence, the first fold edge and the third fold edge are connected perpendicularly to two ends of the second fold edge, one end of the first extending segment away from the second extending segment extends towards the second fold edge, and there is a first interval between the first extending segment and the second fold edge, and one end of the third extending segment away from the third fold edge extends towards the first extending segment, and there is a second interval between the third extending segment and the first extending segment.

[0017] In a possible design, the inner corner piece includes a six-fold edge portion formed by bending a plate body and a connecting plate provided at one end of the six-fold edge portion, the connecting plate is perpendicular to the extending direction of the six-fold edge portion, and the six-fold edge portion and the connecting plate are each provided with a third hole and a fourth hole, and the outer side surface of the six-fold edge portion can be attached to the inner side surface of the six-fold edge profile, so that the inner corner piece can be embedded in the six-fold edge profile and moved along the extending direction of the six-fold edge profile.

[0018] In a possible design, the connecting plate is provided with a first opening and a second opening, the first opening is used for arranging the first extending segment, and the second opening is used for arranging the third extending segment.

[0019] In a possible design, the mounting part comprises a first fitting part capable of fitting the first folding edge and a second fitting part capable of fitting the second folding edge, and the first fitting part and the second fitting part are provided with the fifth hole and the sixth hole.

[0020] In a possible design, the outer corner piece further comprises a reinforcing plate connected to the adjacent mounting parts, and the reinforcing plate has two straight edges connected to each other and perpendicular to each other to connect to the outer edges of the adjacent mounting parts.

[0021] With respect to the background art described above, the profile frame provided by the present application has at least the following beneficial effects:

[0022] The first profile, the second profile and the third profile are all provided with the first holes and the second holes staggered at equal intervals along the extension direction of the profiles, so as to unify the distance between the first holes and the second holes, the inner corner piece is provided with the third hole and the fourth hole, the first connecting piece can be arranged in the corresponding third hole and the first hole for connecting the adjacent profiles, or can be arranged in the corresponding fourth hole and the second hole for connecting the adjacent profiles, two different first connecting pieces can be used to realize at least two fixing modes, and the connection positions among the first profile, the second profile and the third profile can be adjusted to form different frames, the flexibility of profile assembly is improved, the inner corner piece has universality, and the profile assembly is easy, so as to improve the problems of poor universality of the profile and low assembly and disassembly efficiency in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0024] Figure 1 The structural schematic diagram of the profile frame provided by the embodiment of the present application;

[0025] Figure 2 The structural schematic diagram of the profile frame provided by the embodiment of the present application; Figure 1 The local enlarged view of A in the middle;

[0026] Figure 3 The structural schematic diagram of the profile frame provided by the embodiment of the present application from another perspective;

[0027] Figure 4 The structural schematic diagram of the profile frame provided by the embodiment of the present application; Figure 3 The local enlarged view of B in the middle;

[0028] Figure 5 The structural schematic diagram of the profile frame provided by the embodiment of the present application from another perspective;

[0029] Figure 6 For Figure 5 The local enlarged view at C;

[0030] Figure 7 For another view of the structure of the outer corner piece and the inner corner piece provided by the embodiment of the utility model;

[0031] Figure 8 For Figure 7 The local enlarged view at D;

[0032] Figure 9 For the explosion view of the sectional frame provided by the embodiment of the utility model;

[0033] Figure 10 For the structure diagram of the inner corner piece provided by the embodiment of the utility model;

[0034] Figure 11 For the structure diagram of the outer corner piece provided by the embodiment of the utility model;

[0035] Figure 12 For the structure diagram of the six folded edge sectional material provided by the embodiment of the utility model;

[0036] Figure 13 For another view of the structure of the six folded edge sectional material provided by the embodiment of the utility model;

[0037] Figure 14 For the structure diagram of the first connecting piece and the second connecting piece with the clamping part provided by the embodiment of the utility model.

[0038] Wherein:

[0039] 100 - first sectional material, 110 - first hole, 120 - second hole, 130 - first extension section, 140 - second extension section, 150 - first folded edge, 160 - second folded edge, 170 - third folded edge, 180 - third extension section;

[0040] 200 - second sectional material;

[0041] 300 - third sectional material;

[0042] 400 - inner corner piece, 410 - third hole, 420 - fourth hole, 430 - six folded edge part, 440 - connecting plate, 450 - first opening, 460 - second opening;

[0043] 510 - abutting part, 520 - connecting part, 530 - clamping part, 531 - guide surface, 532 - abutting surface, 540 - clamping nut, 550 - screw, 560 - rivet;

[0044] 600-outer corner piece, 610-mounting portion, 611-first fitting portion, 612-second fitting portion, 620-fifth hole, 630-sixth hole, 640-stiffening plate. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0046] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0047] In the description of the present application, it should be understood that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0048] The purpose of the present application is to provide a profile frame which can adopt at least two fixing modes, can adjust the connection position to form different frames, can improve the flexibility of profile assembly, is easy to assemble, can improve the poor versatility and low assembly and disassembly efficiency of the profile in the prior art.

[0049] It should be noted that in the drawings, the direction of X is defined as the first direction, the direction of Y is defined as the second direction, and the direction of Z is defined as the third direction. The first direction is perpendicular to the second direction and the third direction, and the second direction and the third direction are perpendicular to each other.

[0050] Please refer to Figures 1 to 8To achieve the above object, the utility model provides a section bar frame, including section bar and inner corner piece 400, section bar includes first section bar 100 along the first direction extension, second section bar 200 along the second direction extension and third section bar 300 along the third direction extension, first section bar 100, second section bar 200 and third section bar 300 all are equipped with first hole 110 and second hole 120 along the self extension direction equidistance staggered arrangement, first hole 110 and second hole 120 can be two types of through -hole that can be applicable to the installation of different connecting piece, inner corner piece 400 is equipped with the third hole 410 that can correspond to first hole 110 and the fourth hole 420 that can correspond to second hole 120, first connecting piece is passed and is equipped with corresponding first hole 110 and third hole 410 and / or corresponding second hole 120 and fourth hole 420 to connect adjacent section bar and form frame.

[0051] Among them, inner corner piece 400 is equipped with multiple third holes 410 and multiple fourth holes 420, after being connected to a section bar through a group of third holes 410 and / or a group of fourth holes 420, another group of third holes 410 and / or another group of fourth holes 420 are connected to the section bar adjacent to the section bar, taking one second section bar 200 and one third section bar 300 are connected to the same first section bar 100 as an example, one inner corner piece 400 can be installed and fixed at the end of second section bar 200, another inner corner piece 400 is installed and fixed at the end of third section bar 300, one end of second section bar 200 and third section bar 300 with the inner corner piece 400 is placed on first section bar 100, and is connected and fixed through corresponding first hole 110 and third hole 410 and / or corresponding second hole 120 and fourth hole 420, and the frame with the preset size can be connected through the size and quantity of section bar, considering that first hole 110 and second hole 120 are equidistantly staggered on all section bars, the section bar has universality, and can be produced through the same model or process and cut according to the required length, the first hole 110 and the second hole 120 not connected can be used for the assembly of subsequent other components and the butt joint of other frames.

[0052] The first profile 100, the second profile 200 and the third profile 300 are provided with the first holes 110 and the second holes 120 staggered at equal intervals along the extending direction of the profiles, so as to unify the distance between the first holes 110 and the second holes 120, the inner corner piece 400 is provided with the third holes 410 and the fourth holes 420, the first connecting piece can be arranged in the corresponding third hole 410 and the first hole 110 for connecting adjacent profiles, or can be arranged in the corresponding fourth hole 420 and the second hole 120 for connecting adjacent profiles, two different first connecting pieces can be used to realize at least two fixing modes, and the connecting positions between the first profile 100, the second profile 200 and the third profile 300 can be adjusted to form different frames, improving the flexibility of profile assembly, the inner corner piece 400 has universality, and is easy to assemble profiles, so as to improve the problem of poor universality of profiles and low assembly and disassembly efficiency in the prior art.

[0053] Please refer to Figure 9 and Figure 11 In some embodiments, in order to be suitable for various installation environments and requirements while ensuring the strength of the installation frame, in addition to the inner corner piece 400 for connecting adjacent profiles, an outer corner piece 600 capable of being connected to the corner of the frame is further included, the outer corner piece 600 is provided with three mounting portions 610 capable of being attached to the first profile 100, the second profile 200 and the third profile 300 respectively, and the mounting portion 610 is provided with a fifth hole 620 capable of corresponding to the first hole 110 and a sixth hole 630 capable of corresponding to the second hole 120, and the second connecting piece is arranged in the corresponding first hole 110 and the fifth hole 620 and / or the corresponding second hole 120 and the sixth hole 630 to connect adjacent profiles, for example, in a corner formed by one first profile 100, one second profile 200 and one third profile 300, the outer corner piece 600 is connected and fixed with the first profile 100 through the first mounting portion 610, is connected and fixed with the second profile 200 through the second mounting portion 610, so that the first profile 100 and the second profile 200 are relatively fixed, the outer corner piece 600 is connected and fixed with the third profile 300 through the third mounting portion 610, so that the first profile 100 and the third profile 300 are relatively fixed, and the second profile 200 and the third profile 300 are relatively fixed, thereby enhancing the connection strength of the frame and the overall stability, the outer corner piece 600 can adopt an integrated structure, thereby improving the overall structural strength of the outer corner piece 600 and ensuring the stability of the connection, so as to improve the fixing effect on the corner of the frame.

[0054] In one embodiment, the first hole 110, the third hole 410 and the fifth hole 620 are square holes with the same cross-sectional dimension perpendicular to the direction of extension, facilitating the alignment between the first hole 110 and the third hole 410, and the alignment between the first hole 110 and the fifth hole 620, which need to be connected by the first connector or the second connector. In addition, the first hole 110, the third hole 410 and the fifth hole 620 can be aligned and then threaded through by the same first connector or second connector, so that the connection between the profile, the outer corner piece 600 and the inner corner piece 400 can be achieved by one first connector or second connector, thereby reducing the number of first connectors or second connectors used and the difficulty of assembling the frame. In addition, the distance between the adjacent square holes in the same plane and in the direction of the square hole arrangement in the profile, the outer corner piece 600 and the inner corner piece 400 is consistent, for example, the distance between the square hole in one plane of the first profile 100 and the square hole adjacent to it in the first direction is consistent, facilitating the alignment process of the square hole. Specifically, after aligning the square hole in the inner corner piece 400 that needs to be connected to the first profile 100 with one square hole of the first profile 100, the remaining square holes are also aligned accordingly, making it easier to achieve alignment and improving assembly efficiency.

[0055] Please refer to Figure 14 In one embodiment, the first connector and / or the second connector includes an abutting portion 510 and a connecting portion 520 connected to each other. The connecting portion 520 is located at one end of the abutting portion 510 and can be threaded through the square hole. The connecting portion 520 is provided with a clamping portion 530 with elastic deformation. The clamping portion 530 and the abutting portion 510 on the side facing each other can abut against the end face of the square hole to limit the relative movement of the connected connector and the square hole after clamping. At least two square holes are threaded through the connecting portion 520 after alignment, so that the profile connects the inner corner piece 400 and / or the outer corner piece 600. Taking the connection of two square holes as an example, the abutting portion 510 abuts against one end face on the side facing away from the two square holes, and the clamping portion 530 with elastic deformation is pressed into the two square holes and abuts against the other end face on the side facing away from the two square holes. The abutting portion 510 and the clamping portion 530 abut against the end face on the side facing away from the two square holes to compress the two square holes, so that the profile is tightly attached to the inner corner piece 400 and / or the outer corner piece 600, and the profile can be connected to the frame without the use of installation tools.

[0056] Further, the number of the clamping portions 530 can be one to four, when the clamping portions 530 are one, they can be arranged on any side of the connecting portion 520 adhering to the inner wall of the square hole, when the clamping portions 530 are two, they can be arranged on two opposite sides of the connecting portion 520 adhering to the inner wall of the square hole, the side of the clamping portion 530 away from the connecting portion 520 is provided with a guide surface 531, the distance between the end of the guide surface 531 away from the abutting portion 510 and the connecting portion 520 is smaller than the distance between the end of the guide surface 531 close to the abutting portion 510 and the connecting portion 520, so that in the process of the connecting portion 520 being arranged in the square hole, the smaller end of the clamping portion 530 enters the gap between the connecting portion 520 and the inner wall of the square hole first, reducing the resistance in the process of the clamping portion 530 being arranged in the square hole, the clamping portion 530 is also provided with an abutting surface 532 facing the abutting portion 510, the abutting surface 532 is perpendicular or approximately perpendicular to the central axis of the connecting portion 520, so as to ensure the abutting effect of the abutting surface 532.

[0057] In one embodiment, the square hole of the first profile 100, the second profile 200 and the third profile 300 is provided with a clamping nut 540, the first connecting member and / or the second connecting member is specifically a screw 550 adapted to the clamping nut 540, by assembling the clamping nut 540 into the square hole of the profile which needs to be connected, then connecting the clamping nut 540 by the screw 550 arranged in the square hole of the outer corner piece 600 and / or the inner corner piece 400, the detachable connection between the profile and the outer corner piece 600 and / or the inner corner piece 400 is realized, the disassembly and assembly of the frame can be quickly realized, the clamping nut 540 and the screw 550 can be repeatedly used, so as to reduce the cost of the frame.

[0058] In one embodiment, the second hole 120, the fourth hole 420 and the sixth hole 630 are all circular holes with the same cross-sectional size perpendicular to the direction of their extension, facilitating the alignment between the second hole 120 and the fourth hole 420 and the alignment between the second hole 120 and the sixth hole 630 that need to be connected by the first connecting member or the second connecting member, and in addition, the second hole 120, the fourth hole 420 and the sixth hole 630 can be aligned and then threaded through by the same first connecting member or second connecting member, and the connection between the profile, the outer corner piece 600 and the inner corner piece 400 can be achieved by one first connecting member or second connecting member, so as to reduce the number of first connecting members or second connecting members used and reduce the assembly difficulty of the frame, in addition, the distance between the adjacent circular holes in the same plane and in the direction of the circular hole arrangement of the profile, the outer corner piece 600 and the inner corner piece 400 is consistent, for example, the distance between the circular hole on one plane of the first profile 100 and the circular hole adjacent to it in the first direction is consistent, facilitating the alignment process of the circular hole, specifically, after the circular hole in the inner corner piece 400 that needs to be connected to the first profile 100 is aligned with one circular hole of the first profile 100, the remaining circular holes are also aligned accordingly, making it easier to achieve alignment, improving assembly efficiency, the first connecting member and / or the second connecting member is specifically a rivet 560 or a self-tapping screw that can be threaded into the circular hole, having high installation efficiency, ensuring the strength of the frame, while reducing the maintenance frequency and saving costs.

[0059] Please refer to Figure 12 and Figure 13In one embodiment, the first profile 100, the second profile 200 and the third profile 300 are six-flap profiles including five inner corners, the six-flap profile includes a first extension section 130, a second extension section 140, a first flap 150, a second flap 160, a third flap 170 and a third extension section 180 connected in sequence, the first flap 150 and the third flap 170 are perpendicularly connected to two ends of the second flap 160, one end of the first extension section 130 away from the second extension section 140 extends towards the second flap 160, and there is a first interval between the first extension section 130 and the second flap 160, one end of the third extension section 180 away from the third flap 170 extends towards the first extension section 130, and there is a second interval between the third extension section 180 and the first extension section 130, the six-flap profile has high strength, and the first interval and the second interval can facilitate the installation of the first connecting piece and the second connecting piece, the first extension section 130, the second extension section 140, the first flap 150, the second flap 160, the third flap 170 and the third extension section 180 are all provided with the first hole 110 and the second hole 120 for the connection and fixation of other components, such as a lighting base, a camera and a sensor. Meanwhile, the first hole 110 and the second hole 120 can be provided in two sets or more sets, for example, two sets of first holes 110 and two sets of second holes 120 are arranged on the first flap 150, and each set of first holes 110 is arranged in the first direction; three sets of first holes 110 and two sets of second holes 120 are arranged on the second flap 160, and each set of first holes 110 is arranged in the first direction, thereby improving the connection effect of the first flap 150 and the second flap 160 with the outer corner piece 600 and the inner corner piece 400.

[0060] Please refer to Figure 10In one embodiment, the inner corner piece 400 includes a six-fold edge portion 430 formed by bending the plate body and a connecting plate 440 arranged at one end of the six-fold edge portion 430, the connecting plate 440 is perpendicular to the extension direction of the six-fold edge portion 430, and the six-fold edge portion 430 and the connecting plate 440 are both provided with the third hole 410 and the fourth hole 420, the outer side surface of the six-fold edge portion 430 can be attached to the inner side surface of the six-fold edge profile, so that the inner corner piece 400 can be embedded in the six-fold edge profile and moved along the extension direction of the six-fold edge profile, so as to adjust the relative position of the inner corner piece 400 and the six-fold edge profile to a certain extent, and avoid problems such as the failure of the profiles to be connected due to installation errors. In order to realize the movement between the inner corner piece 400 and the six-fold edge profile in a larger range, that is, the inner corner piece 400 can be located entirely inside the six-fold edge profile, the connecting plate 440 is provided with a first opening 450 and a second opening 460, the first opening 450 is used for the first extension section 130 to pass through, and the second opening 460 is used for the third extension section 180 to pass through. At the same time, through the cooperation of the first opening 450 and the first extension section 130, and the cooperation of the second opening 460 and the third extension section 180, the inner corner piece 400 is supported, and deformation and rotation of the inner corner piece 400 relative to the six-fold edge profile are avoided.

[0061] In one embodiment, the mounting portion 610 includes a first attachment portion 611 capable of being attached to the first fold edge 150 and a second attachment portion 612 capable of being attached to the second fold edge 160, and the first attachment portion 611 and the second attachment portion 612 are both provided with the fifth hole 620 and the sixth hole 630, so as to improve the attachment degree of the outer corner piece 600 and the profile, cooperate with the inner corner piece 400 to pull the six-fold metal profile together, and greatly increase the strength of the frame. The outer corner piece 600 further includes a reinforcing plate 640 connected to adjacent mounting portions 610, the reinforcing plate 640 has two straight edges connected to each other and perpendicular to each other, so as to be connected to the outer side edges of the adjacent mounting portions 610, so as to form a support between the mounting portions 610 and avoid deformation of the mounting portions 610.

[0062] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any actual relationship or order between the entities.

[0063] The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0064] The principle and implementation mode of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method and core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A profile frame, characterized in that, The profile comprises a first profile (100) extending along a first direction, a second profile (200) extending along a second direction, and a third profile (300) extending along a third direction, the first profile (100), the second profile (200), and the third profile (300) are each provided with first holes (110) and second holes (120) staggered at equal intervals along the extending direction thereof; An inner corner piece (400) is provided with third holes (410) corresponding to the first holes (110) and fourth holes (420) corresponding to the second holes (120), a first connecting piece is arranged through the corresponding first holes (110) and third holes (410) and / or the corresponding second holes (120) and fourth holes (420) to connect adjacent profiles to form a frame; Any one of the first direction, the second direction, and the third direction is perpendicular to the other two.

2. The profile frame according to claim 1, further comprising an outer corner piece (600) provided with three mounting portions (610) capable of being attached to the first profile (100), the second profile (200), and the third profile (300) respectively, and the mounting portion (610) is provided with fifth holes (620) corresponding to the first holes (110) and sixth holes (630) corresponding to the second holes (120), and a second connecting piece is arranged through the corresponding first holes (110) and fifth holes (620) and / or the corresponding second holes (120) and sixth holes (630) to connect adjacent profiles.

3. The profile frame according to claim 2, wherein the first holes (110), the third holes (410), and the fifth holes (620) are square holes with the same cross-sectional dimension perpendicular to the extending direction thereof, and the second holes (120), the fourth holes (420), and the sixth holes (630) are circular holes with the same cross-sectional dimension perpendicular to the extending direction thereof.

4. The profile frame according to claim 3, wherein the first connecting piece and / or the second connecting piece comprises a connecting portion (520) and an abutting portion (510) connected to each other, the connecting portion (520) is located at one end of the abutting portion (510) and can be arranged through the square hole, and the connecting portion (520) is provided with a clamping portion (530) with elastic deformation, and the clamping portion (530) and the abutting portion (510) on the side facing each other can abut against the end surface of the square hole to limit the relative movement of the connecting piece and the square hole after clamping.

5. The profile frame according to claim 4, wherein ​ ​ ​ ​ The guiding surface (531) is provided on the side of the clamping part (530) away from the connecting part (520), and the distance between the end of the guiding surface (531) away from the abutting part (510) and the connecting part (520) is less than the distance between the end of the guiding surface (531) close to the abutting part (510) and the connecting part (520).

6. The profile frame according to claim 3, wherein, The square hole of the first profile (100), the second profile (200) and the third profile (300) is provided with a clamping nut (540), and the first connecting part and / or the second connecting part is a screw (550) matched with the clamping nut (540).

7. The profile frame according to claim 3, wherein, The first connecting part and / or the second connecting part is a rivet (560) or a self-tapping screw capable of being arranged in the round hole.

8. The profile frame according to any one of claims 3-7, wherein, The first profile (100), the second profile (200) and the third profile (300) are six-flap profiles including five inner corners, and the six-flap profile includes a first extension section (130), a second extension section (140), a first flap (150), a second flap (160), a third flap (170) and a third extension section (180) connected in sequence, the first flap (150) and the third flap (170) are perpendicularly connected to two ends of the second flap (160), the first extension section (130) extends toward the second flap (160) from one end away from the second extension section (140), and a first interval exists between the first extension section (130) and the second flap (160), and the third extension section (180) extends toward the first extension section (130) from one end away from the third flap (170), and a second interval exists between the third extension section (180) and the first extension section (130).

9. The profile frame according to claim 8, wherein, The inner corner part (400) includes a six-flap part (430) formed by bending a plate body and a connecting plate (440) provided at one end of the six-flap part (430), the connecting plate (440) is perpendicular to the extension direction of the six-flap part (430), and the six-flap part (430) and the connecting plate (440) are both provided with the third hole (410) and the fourth hole (420), and the outer side surface of the six-flap part (430) can be attached to the inner side surface of the six-flap profile, so that the inner corner part (400) can be embedded in the six-flap profile and moved along the extension direction of the six-flap profile.

10. The profile frame according to claim 9, wherein, The connecting plate (440) is provided with a first opening (450) for the first extension section (130) to pass through and a second opening (460) for the third extension section (180) to pass through.

11. The profile frame according to claim 8, characterized in that The mounting portions (610) each include a first fitting portion (611) capable of fitting to the first folded edge (150) and a second fitting portion (612) capable of fitting to the second folded edge (160), and the first fitting portion (611) and the second fitting portion (612) are each provided with the fifth hole (620) and the sixth hole (630).

12. The profile frame according to claim 8, characterized in that The outer corner piece (600) further includes a reinforcing plate (640) connected to adjacent mounting portions (610), and the reinforcing plate (640) has two straight angle sides connected to each other and perpendicular to each other to connect to the outer side edges of adjacent mounting portions (610).

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