An inner and outer rail structure

Abstract

This invention discloses an inner and outer rail structure, comprising a main rail, a secondary rail, a mounting bracket, and a base. Both the main rail and the secondary rail are frame-shaped, with at least one end of the secondary rail inserted into the main rail, thus forming a track. The mounting bracket is slidably mounted on the base and can slide along it. When the main rail or the secondary rail is mounted on the base, the side of the mounting bracket adjacent to the main rail abuts against each other, while the side of the mounting bracket furthest from the main rail abuts against the base, thus fixing the mounting bracket and the main rail to the base. The track is connected and fixed via the sliding mounting bracket. The mounting bracket reciprocates and adjusts its distance from the track, thereby fixing or releasing the track. Compared to existing technologies, this significantly reduces the difficulty of track assembly and disassembly, simplifies the process, and effectively shortens assembly and disassembly time. Furthermore, the track includes a main rail and a secondary rail, both of which can be connected to the base via the mounting bracket, offering good versatility and improving the practicality of the inner and outer rail structure.

Description

Technical Field

[0001] This invention belongs to the field of electric curtain technology, specifically relating to an inner and outer track structure. Background Technology

[0002] Smart home is a residential platform that integrates facilities related to home life using comprehensive wiring technology, network communication technology, security technology, automatic control technology, and audio-visual technology. It builds an efficient management system for residential facilities and daily household affairs, improves home security, convenience, comfort, and aesthetics, and achieves an environmentally friendly and energy-saving living environment.

[0003] Motorized curtains are a type of smart home product. They consist of tracks, which in the past were connected to supports and other components via fixed connections. Later, this was changed to threaded connections. While threaded connections allow for detachable connections, in practice, the large number of bolts makes disassembly and assembly cumbersome and time-consuming. Furthermore, when motorized curtains are installed against a wall, the bolts facing the wall become even more difficult to install or remove due to insufficient space. Summary of the Invention

[0004] The purpose of this invention is to provide an inner and outer rail structure to solve the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An inner and outer rail structure includes a main rail, a secondary rail, a mounting bracket, and a base;

[0007] Both the main rail and the auxiliary rail are frame-shaped, and the auxiliary rail is inserted into the main rail at least at one end. Accordingly, the main rail and the auxiliary rail form a track. The mounting bracket is slidably mounted on the base and can slide along the base.

[0008] When the main rail or the auxiliary rail is placed on the base, the mounting bracket abuts against the side of the main rail adjacent to it, and the side of the mounting bracket away from the main rail abuts against the base, so that the mounting bracket and the main rail are fixed on the base.

[0009] In one possible design, the base includes a base plate and side plates, wherein two side plates are provided and fixed to opposite sides of the base plate respectively, the base plate and the side plates form a mounting groove, and correspondingly, the mounting bracket is slidably disposed on the mounting groove.

[0010] The base plate is provided with a limiting post adapted to the mounting code; the side plate is provided with a recessed secondary mounting groove, which is connected to the mounting groove, and the main rail or the secondary rail can be inserted into the secondary mounting groove accordingly.

[0011] In one possible design, the substrate has several weight-reduction holes, and a connecting plate is provided at the end of the substrate away from the mounting bracket. The connecting plate is fixed to the substrate and connects two adjacent side plates.

[0012] The top of the side panel has an inwardly bent fold plate, and correspondingly, the mounting bracket has a first slot adapted to the fold plate.

[0013] In one possible design, the mounting code has a snap-fit ​​structure on the side facing the main rail or the auxiliary rail. The snap-fit ​​structure includes a snap-fit ​​bar, a second snap-fit ​​groove, and an abutment spring. Several snap-fit ​​bars are provided and spaced apart. The gap between adjacent snap-fit ​​bars forms the second snap-fit ​​groove. One end of the abutment spring is fixedly connected to the mounting code, and the other end of the abutment spring extends outward.

[0014] In one possible design, the mounting bracket has a push bar on the side facing away from the main rail or the auxiliary rail, and the push bar is fixed to the top surface of the mounting bracket; the top surface of the mounting bracket has a recessed auxiliary weight reduction hole.

[0015] In one possible design, the main rail has a first groove and the secondary rail has a second groove, the first groove and the second groove are interconnected and form a sliding groove; the main rail has a first sliding structure adapted to the sliding member and the secondary rail has a second sliding structure adapted to the sliding member, and the first sliding structure and the second sliding structure are offset from each other.

[0016] In one possible design, the main rail includes a first base plate, on which the first groove is provided. The first groove has two opposing sides, each side having a slider extending upward into the main rail. The bottom surface of the first base plate is configured as an abutment surface capable of contacting the sliding element. Accordingly, the two sliders and the abutment surface constitute the first sliding structure.

[0017] In one possible design, the main rail includes a first main body in the shape of a U-shape, the open end of the first main body is connected to a first base plate, and the first main body is connected to the outside through a first groove.

[0018] The first main body has a connecting structure on one side opposite to the first base plate. The connecting structure includes a connecting groove located inside the main body and a connecting seat located outside the main body.

[0019] In one possible design, the secondary rail includes a second base plate with a second groove on the base plate. The second groove has two opposing sides, each side abutting against an adjacent slider. The second base plate has opposing outer and inner surfaces. The outer surface of at least one end of the second base plate abuts against a first base plate. The inner surface has two limiting strips symmetrically arranged about the second groove, forming a groove between the two limiting strips that is adapted to the slider.

[0020] In one possible design, the subrail includes a second main body in the shape of a U-shape, the open end of the second main body is connected to the second base plate, and the second main body is connected to the outside through the second groove;

[0021] The second main body is provided with a secondary connecting structure on one side opposite to the second base plate. The secondary connecting structure includes an abutment seat located inside the second main body and a support leg located outside the second main body. Correspondingly, the abutment seat and the slide groove form the second sliding structure, and the support leg can abut against the main rail.

[0022] Beneficial effects:

[0023] The track is connected and fixed by sliding mounting brackets. The mounting brackets slide back and forth and adjust their distance from the track, thereby fixing or loosening the track. Compared with existing technologies, this greatly reduces the difficulty of track assembly and disassembly, simplifies the process, and effectively shortens the assembly and disassembly time. Furthermore, the track includes a main track and a secondary track, both of which can be connected to the base via mounting brackets, offering good versatility and improving the practicality of the inner and outer track structure. Attached Figure Description

[0024] Figure 1 This is a side view schematic diagram of an inner and outer rail structure.

[0025] Figure 2 This is a schematic diagram of the assembly structure of the mounting bracket and the base.

[0026] Figure 3 This is a schematic diagram of the track structure.

[0027] Figure 4 This is a schematic diagram of the track structure when equipped with rollers.

[0028] In the picture:

[0029] 100. Main rail; 101. First base plate; 102. First groove; 103. Sliding bar; 104. First main body; 105. Connecting groove; 106. Connecting seat; 200. Secondary rail; 201. Second base plate; 202. Second groove; 203. Limiting bar; 204. Sliding groove; 205. Abutment seat; 206. Support leg; 300. Mounting bracket; 310. Snap-fit ​​structure; 301. Locking bar; 302. Second locking groove; 303. 1. Abutment spring; 304. Push bar; 305. Secondary weight reduction hole; 400. Base; 401. Base plate; 402. Side plate; 403. Mounting groove; 404. Limiting post; 405. Secondary mounting groove; 406. Weight reduction hole; 407. Connecting plate; 408. Folding plate; 500. Sliding component; 5. Hanging wheel; 51. Sliding seat; 52. Hanging wheel body; 501. Third main body; 502. First sliding plate; 503. Second sliding plate. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0031] Example:

[0032] like Figures 1-4 As shown, an inner and outer rail structure includes a main rail 100, a secondary rail 200, a mounting bracket 300, and a base 400.

[0033] Both the main rail 100 and the secondary rail 200 are frame-shaped, and at least one end of the secondary rail 200 is inserted into the main rail 100. Accordingly, the main rail 100 and the secondary rail 200 form a track. The mounting bracket 300 is slidably disposed on the base 400 and can slide along the base 400.

[0034] When the main rail 100 or the secondary rail 200 is mounted on the base 400, the mounting bracket 300 abuts against the side of the main rail 100 adjacent to it, and the side of the mounting bracket 300 away from the main rail 100 abuts against the base 400, so that the mounting bracket 300 and the main rail 100 are fixed on the base 400.

[0035] In the described inner and outer rail structure, the rails are connected and fixed via sliding mounting brackets 300. The mounting brackets 300 slide back and forth, adjusting their distance from the rails to fix or loosen them. Compared to existing technologies, this significantly reduces the difficulty of rail assembly and disassembly, simplifies the process, and effectively shortens assembly and disassembly time. Furthermore, the rails include a main rail 100 and a secondary rail 200, both of which can be connected to the base 400 via the mounting brackets 300, offering good versatility and improving the practicality of the inner and outer rail structure.

[0036] During installation, the main rail 100 is connected to the secondary rail 200. One of the main rail 100 and the secondary rail 200 is placed on the base 400. Taking the main rail 100 as an example, the mounting bracket 300 can be moved in advance before placing the main rail 100 to improve the ease of placement. After placement, the mounting bracket 300 is moved again to make the mounting bracket 300 press against the main rail 100. At the same time, the mounting bracket 300 and the base 400 cooperate to clamp the main rail 100, thereby fixing the main rail 100 on the base 400.

[0037] Conversely, during disassembly, moving the mounting bracket 300 away from the main rail 100 will detach the mounting bracket 300 from the main rail 100, restoring the main rail 100's freedom of movement. This facilitates subsequent operations. After the operation is complete, reinstallation can be performed.

[0038] Similarly, the structure of the secondary rail 200 is similar to that of the main rail 100, so the principle of connecting the two to the base 400 is the same, which will not be elaborated here.

[0039] Therefore, for the operator, when disassembling and assembling the inner and outer rail structures, it is only necessary to move the mounting bracket 300 back and forth. The operation is simple and easy to master, the required time is greatly reduced, and the work efficiency is improved.

[0040] In this embodiment, the base 400 includes a base plate 401 and a side plate 402. Two side plates 402 are provided and fixed on opposite sides of the base plate 401 respectively. The base plate 401 and the side plates 402 form a mounting groove 403. Correspondingly, the mounting bracket 300 is slidably disposed on the mounting groove 403.

[0041] The base plate 401 is provided with a limiting post 404 adapted to the mounting code 300; the side plate 402 is provided with a recessed secondary mounting groove 405, which is connected to the mounting groove 403. Accordingly, the main rail 100 or the secondary rail 200 can be inserted into the secondary mounting groove 405.

[0042] Based on the above design, the base plate 401 and the side plate 402 form a mounting groove 403, which limits and guides the sliding direction of the mounting bracket 300. The limiting post 404 is used to limit the sliding range of the mounting bracket 300 to ensure that the mounting bracket 300 provides sufficient clamping force. The secondary mounting groove 405 provides space for the installation of the track, and also makes the track portion and the mounting bracket 300 portion opposite each other, so that they can form an abutment relationship after the mounting bracket 300 slides, ultimately achieving the purpose of clamping the track.

[0043] During installation, the operator places the track and then slides the mounting bracket 300 along the mounting groove 403. To disassemble, slide the mounting bracket 300 and then remove the track.

[0044] Meanwhile, based on the shapes of the main rail 100 and the secondary rail 200, the secondary mounting groove 405 can be constructed into any suitable shape, and the present invention does not impose any restrictions on this.

[0045] In one possible implementation, the substrate 401 has several weight-reducing holes 406, and a connecting plate 407 is provided at the end of the substrate 401 away from the mounting bracket 300. The connecting plate 407 is fixed to the substrate 401 and connects two adjacent side plates 402. Based on the above design, the weight of the base 400 is reduced by the weight-reducing holes 406, making the base 400 lightweight and easy to carry. The connecting plate 407 strengthens the connection, thereby improving the structural strength of the base 400.

[0046] In one possible implementation, the top of the side plate 402 is provided with an inwardly bent folding plate 408, and correspondingly, the mounting bracket 300 is provided with a first slot adapted to the folding plate 408. Based on the above design, the folding plate 408 serves as a limit to prevent the mounting bracket 300 from disengaging from the mounting groove 403. At the same time, the degree of freedom of the mounting bracket 300 is restricted by the cooperation of the limiting post 404 and the folding plate 408, so that the mounting bracket 300 can only slide back and forth along the mounting groove 403, ensuring that the mounting bracket 300 moves in the designed direction.

[0047] In this embodiment, the mounting code 300 is provided with a snap-fit ​​structure 310 on the side facing the main rail 100 or the secondary rail 200. The snap-fit ​​structure 310 includes a snap-fit ​​bar 301, a second snap-fit ​​groove 302 and an abutment spring 303. A plurality of snap-fit ​​bars 301 are provided and spaced apart. The gap between adjacent snap-fit ​​bars 301 forms the second snap-fit ​​groove 302. One end of the abutment spring 303 is fixedly connected to the mounting code 300, and the other end of the abutment spring 303 extends outward.

[0048] Based on the above design, the snap-fit ​​structure 310 can be divided into two parts. The first part is the snap-fit ​​strip 301 and the second snap-fit ​​groove 302, which cooperate with each other to connect the mounting bracket 300 to the track. Specifically, the snap-fit ​​strip 301 can be inserted into the track, and the protruding part of the track can also be inserted into the second snap-fit ​​groove 302. The second part is the abutment spring 303, which provides elastic force through deformation. It cooperates with the limiting post 404 to limit the movement of the spring, so that the elastic force acts on the track, thereby causing the mounting bracket 300 to abut against the track.

[0049] Optionally, such as Figure 2 As shown, considering the small size of the mounting code 300, two card strips 301 are provided, with a second card slot 302 between the two card strips 301. Furthermore, when the size of the mounting code 300 is large, the number of card strips 301 can be appropriately increased, thereby increasing the number of second card slots 302.

[0050] In one possible implementation, the mounting bracket 300 has a push bar 304 on the side facing away from the main rail 100 or the secondary rail 200, and the push bar 304 is fixed to the top surface of the mounting bracket 300; the top surface of the mounting bracket 300 has a recessed secondary weight-reducing hole 305. Based on the above design, the push bar 304 is provided for the operator to hold in order to push and pull the mounting bracket 300. And it is easy to understand that the push bar 304 can be constructed into any suitable shape.

[0051] The secondary weight-reducing hole 305 can reduce the weight of the mounting bracket 300 and is also fitted onto the limiting post 404. When the mounting bracket 300 slides to the point where the secondary weight-reducing hole 305 abuts against the limiting post 404, it means that the mounting bracket 300 has slid to its limit position. Based on limiting the sliding range of the mounting bracket 300, it provides the prerequisite for the mounting bracket 300 to press against the track by abutting the spring 303.

[0052] Example 2:

[0053] like Figures 1-4 As shown, the main rail 100 is provided with a first groove 102, and the secondary rail 200 is provided with a second groove 202. The first groove 102 and the second groove 202 are interconnected and form a sliding groove. The main rail 100 is provided with a first sliding structure adapted to the sliding member 500, and the secondary rail 200 is provided with a second sliding structure adapted to the sliding member 500. The first sliding structure and the second sliding structure are misaligned with each other.

[0054] The main rail 100 is provided with a first sliding structure, which has multiple contact points with the slider 500 to ensure that the slider 500 slides smoothly; similarly, the secondary rail 200 is provided with a second sliding structure, which has multiple contact points with the slider 500 to ensure that the slider 500 slides smoothly.

[0055] During long-term use, the end of the secondary rail 200 is inserted into the main rail 100, and the connection point between the main rail 100 and the secondary rail 200 is relatively stable. In the prior art, the main rail 100 and the secondary rail 200 are abutted and fixedly connected. After long-term use, misalignment will occur, making it more difficult to slide across the connection point, and jamming and obstruction will be more obvious.

[0056] At the connection point between the main rail 100 and the secondary rail 200, at least one end of the secondary rail 200 is inserted into the main rail 100 to achieve connection. The first sliding structure and the second sliding structure are staggered to avoid mutual interference and to ensure that at least a portion of the end of the secondary rail 200 can be inserted into the main rail 100. Based on this, the main rail 100 and the secondary rail 200 are at least on the same horizontal line near the connection point, allowing the slider 500 to switch relatively smoothly between the first and second sliding structures, reducing jamming and obstruction when the slider 500 slides over the connection point.

[0057] As is easily understood, the sliding component 500 includes, but is not limited to, the roller 5 and the trolley.

[0058] In this embodiment, the main rail 100 includes a first base plate 101, on which the first groove 102 is provided. The first groove 102 has two opposing sides, and each side is provided with a slider 103 extending upward into the main rail 100. The bottom surface of the first base plate 101 is constructed to be an abutment surface that can contact the slider 500. Correspondingly, the two sliders 103 and the abutment surface constitute the first sliding structure.

[0059] Based on the above design, the first groove 102 connects the inside and outside, facilitating the insertion of the slider 500 onto the main rail 100, thus connecting the slider 500 and the main rail 100. The first groove 102 is equipped with a slide bar 103. For the portion of the slider 500 that contacts the main rail 100, its upper part is supported by the slide bar 103, and its lower part abuts against the contact surface. Therefore, the slide bar 103 guides the sliding of the slider 500, effectively reducing the contact area and lowering the sliding resistance. Combined with the increased contact area from the contact surface, this allows the slider 500 to slide smoothly.

[0060] In this embodiment, the main rail 100 includes a first main body 104 in the shape of a concave shape. The open end of the first main body 104 is connected to the first base plate 101, and the first main body 104 communicates with the outside through the first groove 102.

[0061] The first main body 104 has a connecting structure on one side opposite to the first base plate 101. The connecting structure includes a connecting groove 105 located inside the main body and a connecting seat 106 located outside the main body.

[0062] Based on the above design, the first main body 104 has a certain space, which can be used to accommodate the sliding member 500 and to install the secondary rail 200. Considering the connection between the main rail 100 and other components, the main rail 100 is also provided with a connecting structure. The connecting groove 105 is used to connect the secondary rail 200 to improve the reliability of the connection between the main rail 100 and the secondary rail 200, and the connecting seat 106 is used to connect and fix the main rail 100 so that the track can be connected to other components in the motorized curtain.

[0063] Meanwhile, when the main rail 100 is connected to the base 400, that is, the first main body 104 is inserted into the secondary mounting groove 405, there is one or two connecting seats 106. Specifically, when there is one connecting seat 106, the connecting seat 106 faces the rail; when there are two connecting seats 106, one connecting seat 106 faces the rail and the other connecting seat 106 faces the secondary mounting groove 405.

[0064] like Figure 3As shown, the connector 106 is constructed with a hook-shaped structure, and thus has both a groove structure that adapts to the retaining strip 301 and an outward protrusion that adapts to the second retaining groove 302. Correspondingly, when there are two connectors 106, the secondary mounting groove 405 is provided with a third retaining groove that adapts to the connector 106.

[0065] In this embodiment, the sub-rail 200 includes a second base plate 201, on which the second groove 202 is provided. The second groove 202 has two opposite sides, each side abutting against an adjacent slide bar 103. The second base plate 201 has opposite outer and inner surfaces. The outer surface of at least one end of the second base plate 201 abuts against the first base plate 101. Two limiting strips 203 are provided on the inner surface. The two limiting strips 203 are symmetrically arranged with the second groove 202 as the center, and a slide groove 204 adapted to the sliding member 500 is formed between the two limiting strips 203.

[0066] Based on the above design, a limiting groove is formed by the limiting strip 203. The limiting strip 203 supports the sliding member 500 and guides the sliding member 500 to slide along the limiting groove. That is, the function of the limiting groove is the same as that of the sliding bar 103. In addition, the limiting strip 203 also effectively regulates the movement direction of the sliding member 500, reduces additional disturbances, and reduces jamming during the sliding process of the sliding member 500.

[0067] In this embodiment, the sub-rail 200 includes a second main body in the shape of a U-shape, the open end of the second main body is connected to the second base plate 201, and the second main body is connected to the outside through the second groove 202;

[0068] The second main body is provided with a secondary connecting structure on one side opposite to the second base plate 201. The secondary connecting structure includes an abutment seat 205 located inside the second main body and a support leg 206 located outside the second main body. Correspondingly, the abutment seat 205 and the slide groove 204 form the second sliding structure, and the support leg 206 can abut against the main rail 100.

[0069] Based on the above design scheme, the general structure of the secondary rail 200 is consistent with that of the main rail 100, then as follows: Figure 4 As shown, the shape of the second main body is similar to that of the first main body 104, both being U-shaped. Meanwhile, considering that the second main body needs to connect both the slider 500 and the main rail 100, the secondary connection structure includes an abutment 205 and a support leg 206.

[0070] The abutment seat 205 abuts against the slider 500 and cooperates with the limiting groove to effectively restrict the degree of freedom of the slider 500, thereby reducing additional disturbances to the slider 500; such as Figure 4 As shown, the support leg 206 can be inserted and snapped into the connecting groove 105 to fix the main rail 100 and the auxiliary rail 200 together.

[0071] Meanwhile, when the sub-rail 200 is connected to the base 400, that is, the second main body is inserted into the sub-mounting groove 405, there is one or two support legs 206. Specifically, when there is one support leg 206, the support leg 206 faces the rail; when there are two support legs 206, one support leg 206 faces the rail and the other support leg 206 faces the sub-mounting groove 405.

[0072] like Figure 3 As shown, the support leg 206 has a hook-shaped structure, with both a groove structure that fits the retaining strip 301 and an outward protrusion that fits the second retaining groove 302. Correspondingly, when there are two support legs 206, the secondary mounting groove 405 has a fourth retaining groove that fits the support leg 206.

[0073] Furthermore, considering that the base 400 can be used to connect the main rail 100 or the secondary rail 200, the connecting seat 106 and the support leg 206 are constructed with the same shape, and the third slot and the fourth slot are constructed with the same shape to improve versatility.

[0074] In this embodiment, the sliding member 500 includes a hanging wheel 5, which includes a sliding seat 51 and a hanging wheel body 52. ​​The upper part of the sliding seat 51 is slidably disposed in the sliding groove, and the lower part of the sliding seat 51 extends to the outside of the main rail 100 or the auxiliary rail 200 and is connected to the hanging wheel body 52.

[0075] Based on the above design, the upper part of the hanging wheel 5 is located inside the sliding groove and abuts against the first sliding structure or the second sliding structure respectively, and then slides along the sliding groove; the lower part of the hanging wheel 5 is located outside the sliding groove, so as to facilitate the connection of curtains and other components.

[0076] like Figure 3 As shown, the sliding seat 51 includes a third main body 501, a first sliding plate 502 and a second sliding plate 503. The third main body 501 is inserted into the sliding groove, and the end of the third main body 501 can abut against the sub-rail 200. The first sliding plate 502 and the second sliding plate 503 are spaced apart on the third main body 501, and a clamping groove adapted to the first sliding structure and the second sliding structure is formed between the first sliding plate 502 and the second sliding plate 503.

[0077] Based on the above design scheme, when the hanging wheel 5 is connected to the sliding groove, as follows: Figure 3As shown, the first sliding plate 502 is located inside the main rail 100 or the secondary rail 200. The bottom surface of the first sliding plate 502 abuts against the slide bar 103 or the second base plate 201, and the side surface of the first sliding plate 502 abuts against the limiting bar 203. The second sliding plate 503 is located outside the main rail 100 and the secondary rail 200. When the hanging wheel 5 is on the main rail 100, the second sliding plate 503 abuts against the abutting surface. When the hanging wheel 5 is on the secondary rail 201, the second sliding plate 503 is spaced apart from the bottom surface of the second base plate 201. At the same time, the upper end of the third main body 501 abuts against the abutting seat 205.

[0078] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An inner and outer rail structure, comprising a main rail (100), a secondary rail (200), a mounting bracket (300), and a base (400); Both the main rail (100) and the sub-rail (200) are frame-shaped, and at least one end of the sub-rail (200) is inserted into the main rail (100). Accordingly, the main rail (100) and the sub-rail (200) form a track; the mounting bracket (300) is slidably disposed on the base (400) and can slide along the base (400); When the main rail (100) or the secondary rail (200) is set on the base (400), the mounting bracket (300) abuts against the side of the main rail (100) adjacent to each other, and the mounting bracket (300) abuts against the base (400) on the side of the main rail (100) away from the main rail, so that the mounting bracket (300) and the main rail (100) are fixed on the base (400); The base (400) includes a base plate (401) and two side plates (402) located on two opposite long sides of the base plate (401), the base plate (401) and the two side plates (402) forming a mounting groove (403). The side plate (402) is provided with a recessed secondary mounting groove (405) that connects to the mounting groove (403), and the top of the side plate (402) is provided with an inwardly bent fold plate (408). Its features are: The substrate (401) is provided with a limiting post (404) adapted to the mounting bracket (300). The mounting bracket (300) is slidably set on the mounting groove (403), and has a first slot adapted to the folding plate (408). The top surface has a recessed secondary weight reduction hole (305) in the middle, and a snap-fit ​​structure (310) is provided at one end facing the main rail (100). A secondary weight-reducing hole (305) is fitted with a limiting post (404) to limit the sliding range of the mounting bracket (300); The snap-fit ​​structure (310) includes a snap-fit ​​bar (301), a second snap-fit ​​groove (302) and a retaining spring (303). There are two snap-fit ​​bars (301) and the gap between them forms a second snap-fit ​​groove (302). The main rail (100) is inserted into the auxiliary mounting groove (405) on one side and the protruding part on the other side is inserted into the second slot (302); The abutment spring (303) is fixedly connected to the mounting bracket (300) at one end and extends outward at the other end so that the elastic force acts on the track composed of the main rail and the auxiliary rail.

2. The inner and outer rail structure according to claim 1, characterized in that, The substrate (401) has several weight-reducing holes (406), and a connecting plate (407) is provided at one end of the substrate (401) away from the mounting bracket (300). The connecting plate (407) is fixed on the substrate (401) and connects two adjacent side plates (402).

3. The inner and outer rail structure according to claim 1, characterized in that, The main rail (100) is provided with a first groove (102), and the secondary rail (200) is provided with a second groove (202). The first groove (102) and the second groove (202) are interconnected and form a sliding groove. The main rail (100) is provided with a first sliding structure adapted to the sliding member (500), and the secondary rail (200) is provided with a second sliding structure adapted to the sliding member (500). The first sliding structure and the second sliding structure are misaligned with each other.

4. The inner and outer rail structure according to claim 3, characterized in that, The main rail (100) includes a first base plate (101), on which the first groove (102) is provided. The first groove (102) has two opposite sides, and each side is provided with a slider (103) extending upward into the main rail (100). The bottom surface of the first base plate (101) is constructed as an abutment surface that can contact the slider (500). Accordingly, the two sliders (103) and the abutment surface constitute the first sliding structure.

5. The inner and outer rail structure according to claim 4, characterized in that, The main rail (100) includes a first main body (104) in the shape of a concave shape. The open end of the first main body (104) is connected to the first base plate (101), and the first main body (104) is connected to the outside through the first groove (102). The first main body (104) has a connecting structure on the side opposite to the first base plate (101). The connecting structure includes a connecting groove (105) located inside the main body and a connecting seat (106) located outside the main body.

6. The inner and outer rail structure according to claim 4 or 5, characterized in that, The sub-rail (200) includes a second base plate (201), on which the second groove (202) is provided. The second groove (202) has two opposite sides, each side abutting against an adjacent slide bar (103). The second base plate (201) has opposite outer and inner surfaces. The outer surface of at least one end of the second base plate (201) abuts against the first base plate (101). Two limiting strips (203) are provided on the inner surface. The two limiting strips (203) are symmetrically arranged with the second groove (202) as the center. A slide groove (204) adapted to the sliding member (500) is formed between the two limiting strips (203).

7. The inner and outer rail structure according to claim 6, characterized in that, The sub-rail (200) includes a second main body in the shape of a U-shape, the open end of the second main body is connected to the second base plate (201), and the second main body is connected to the outside through the second groove (202); The second main body is provided with a secondary connection structure on the side opposite to the second base plate (201). The secondary connection structure includes an abutment seat (205) located inside the second main body and a support leg (206) located outside the second main body. Correspondingly, the abutment seat (205) and the slide groove (204) form the second sliding structure, and the support leg (206) can abut against the main rail (100).

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