Switchable skeleton

By designing switched ribs and using the combination of fixed brackets and activity brackets, the switching of single and multi -person support is realized, solving the problem of unable to meet the demand for diversified use of existing ribs, reduced resource waste and waste of resources and reduced resources. Incadeant use.

CN222397727UActive Publication Date: 2025-01-28DONGGUAN DERUCCI BEDDING CO LTD
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Patent Information

Application Number
CN202421465166.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-25
Publication Date
2025-01-28
Estimated Expiration
2034-06-25

AI Technical Summary

Technical Problem

The existing rib skeleton cannot switch between single-person support and multi-person support, resulting in waste of resources and inconvenient use.

Method used

Design a switching skeleton, including a fixed bracket and activity bracket. The activity bracket can be stored in the main support space or extended to the outside. In this way, a single or double -row support structure is realized.

Benefits of technology

The switching of the single and multi -person support state of the ribs has been realized to meet the needs of users' diverse use and reduce the problem of waste of resources and inconvenience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of living furniture, and particularly discloses a switchable skeleton which comprises a fixed support, a movable support and a movable support. The movable support has a storage state in which the movable support is stored in the main supporting space and an unfolding state in which the movable support extends out of the main supporting space; when the movable support is in the storage state, the two ends of each movable rib strip assembly are detachably installed on the fixed support; when the movable support is in the unfolded state, one end of each movable rib strip assembly position is detachably installed on the fixed support, and the other end of each movable rib strip assembly position is detachably installed on the movable support. The switchable skeleton provided by the utility model can be switched between a single-person supporting state and a multi-person supporting state, so that the diversified use requirements of users are met.
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Description

Technical Field

[0001] The utility model relates to the technical field of living furniture, in particular to a switchable slatted frame. Background Art

[0002] The slat frame is an important part of the bed frame, which is mainly used to provide support for the mattress. The existing slat frame is usually a fixed design structure: if it is used as a double bed, a double row of rib support bars are used; if it is used as a single bed, a single row of rib support bars are used.

[0003] Many users can use single-row frames when they are young, but as they get older and start a family, they need to use double-row frames. At this time, they can only discard the original single-row frames and buy double-row frames again.

[0004] Discarding single-row skeletons not only results in a certain amount of waste of resources, but also requires a lot of effort to transport them to a waste recycling station, which is very inconvenient.

[0005] Therefore, it is necessary to improve the existing slat frame to solve the problem that it cannot switch between single-person support and multi-person support states.

[0006] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0007] One purpose of the utility model is to provide a switchable slat frame that can switch between a single-person support state and a multi-person support state, thereby meeting the diverse usage needs of users.

[0008] To achieve the above purpose, the utility model provides a switchable rack frame, comprising:

[0009] A fixed bracket, wherein the fixed bracket surrounds and forms a main support space;

[0010] A movable bracket, the movable bracket having a storage state in which the movable bracket is stored in the main support space, and a deployment state in which the movable bracket is extended to the outside of the main support space;

[0011] A plurality of movable rib bar assemblies, when the movable bracket is in the storage state, both ends of each movable rib bar assembly can be detachably installed to the fixed bracket; when the movable bracket is in the expanded state, one end of each movable rib bar assembly can be detachably installed to the fixed bracket, and the other end can be detachably installed to the movable bracket.

[0012] Optionally, the movable bracket includes two right-angle pieces and an intermediate connecting piece respectively slidably connected to the two right-angle pieces;

[0013] Among them, the two right-angle pieces have an inward state in which they slide toward each other along the intermediate connecting piece so that the length dimension of the movable bracket is smaller than the length dimension of the main supporting space; and an outward state in which they slide away from each other along the intermediate connecting piece so that the length dimension of the movable bracket is equal to the length dimension of the fixed bracket.

[0014] Optionally, the intermediate connecting member is provided with two first spring steel balls, and two second spring steel balls located between the two first spring steel balls, and the right-angle member is provided with a steel ball hole;

[0015] When the two right-angle pieces are in the extended state, each of the first spring steel balls is inserted into a steel ball hole of one of the right-angle pieces;

[0016] When the two right-angle pieces are in the retracted state, each of the second spring steel balls is inserted into a steel ball hole of one of the right-angle pieces.

[0017] Optionally, the fixed support includes a fixed U-shaped frame surrounding the main support space, and a track π-shaped frame fixedly arranged below the fixed U-shaped frame;

[0018] Wherein, the two right-angle pieces are both slidably connected to the track π-shaped frame.

[0019] Optional,

[0020] The fixed U-shaped frame includes two fixed cross beams parallel to each other, and a fixed longitudinal beam connecting the two fixed cross beams;

[0021] The track π-shaped frame includes two track cross beams parallel to each other, and a track longitudinal beam connecting the two track cross beams;

[0022] Wherein, the distance between the two track beams is smaller than the distance between the two fixed beams, so that the two track longitudinal beams are located directly below the main support space;

[0023] The end positions of the track crossbeam and the track longitudinal beam protrude outward from the track crossbeam and form an outer protrusion; the upper surfaces of each track crossbeam and the adjacent outer protrusion form an L-shaped groove; each right-angle piece is slidably connected to the track π-shaped frame through an L-shaped groove.

[0024] Optionally, a plurality of I-shaped guide slide blocks are provided in the L-shaped slide groove, and a straight slide groove is provided at the bottom of the right-angle piece;

[0025] The lower end of the I-shaped guide sliding block is inserted into the L-shaped sliding groove, and the upper end is slidably connected with the straight sliding groove.

[0026] Optionally, also include:

[0027] A plurality of fixed rib bar assemblies are provided, each of which is located in the main support space, with one end mounted on the fixed longitudinal beam and the other end mounted on the track longitudinal beam.

[0028] Optionally, both the movable rib bar assembly and the fixed rib bar assembly include:

[0029] The main body of the spareribs;

[0030] A first connecting member, wherein one end of the first connecting member is provided with a first socket for inserting one end of the rib strip body, and the other end of the first connecting member is provided with a hook portion for clamping with the track longitudinal beam;

[0031] A second connecting piece, one end of which is provided with a second socket for inserting the other end of the rib strip body, and the other end of which is provided with a spring latch.

[0032] Optionally, a hook groove for the hook to be inserted into is provided on the bottom surface of the track longitudinal beam, and a buckle part for being engaged with the middle part of the first connecting member is provided on the side surface of the track longitudinal beam.

[0033] Optionally, inner sides of both the fixed longitudinal beam and the right-angle piece are provided with a latch groove for inserting the spring latch.

[0034] The beneficial effects of the utility model are: providing a switchable row frame, when the movable bracket is switched to the storage state stored in the main support space, the overall width dimension is small, and it can be used as a single-row frame; when the movable bracket is switched to the expanded state extending outside the main support space, the overall width dimension is larger, and it can be used as a double-row frame.

[0035] Therefore, the switchable slat frame provided by the present invention can switch between the state of supporting a single person and the state of supporting multiple people, thereby meeting the diverse usage needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 A schematic diagram of the structure of the switchable rack frame provided in the embodiment in the storage state;

[0038] Figure 2A schematic diagram of the structure of the switchable row frame provided in the embodiment in the unfolded state;

[0039] Figure 3 for Figure 2 Explosion diagram of

[0040] Figure 4 A schematic diagram of the structure of a movable sparerib strip assembly provided in an embodiment;

[0041] Figure 5 A schematic diagram of the connection between the first connecting member and the track longitudinal beam provided in the embodiment.

[0042] In the figure:

[0043] 1. Fix the bracket;

[0044] 101. Main support space;

[0045] 102, fixed U-shaped frame; 1021, fixed cross beam; 1022, fixed longitudinal beam;

[0046] 103, track π-shaped frame; 1031, track crossbeam; 1032, track longitudinal beam; 1032a, outer protrusion; 1032b, hook groove; 1032c, buckle; 1033, L-shaped slide groove;

[0047] 104. Industrial guide slider;

[0048] 105, latch slot;

[0049] 2. Movable bracket; 201. Auxiliary support space; 202. Right angle piece; 2021. Slotted groove; 203. Intermediate connecting piece; 2031. First spring steel ball; 2032. Second spring steel ball;

[0050] 3a, movable rib strip assembly; 3b, fixed rib strip assembly; 301, rib strip body; 302, first connecting piece; 3021, hook; 303, second connecting piece; 3031, spring latch. DETAILED DESCRIPTION

[0051] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The word "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present invention, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0052] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which the present invention belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit the present invention.

[0053] In the description of the present invention, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in a logical relationship of "or".

[0054] In the present invention, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0055] Without further restrictions, in the present invention, the words "include", "comprises", "has" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0056] Similar to the understanding in the Examination Guidelines, in the present invention, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of the present invention, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0057] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0058] Unless otherwise expressly specified or limited, in the description of the embodiments of the present utility model, the terms "install", "connect", "connect", "fix", "set" and the like used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the technical field of the present utility model, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to the specific circumstances.

[0059] The utility model provides a switchable slat frame, which is suitable for application scenarios of providing sleep support. The slat frame can switch between single-person support and multi-person support states, thereby meeting the diverse usage needs of users.

[0060] See also Figure 1~Figure 3 The switchable rib frame provided in this embodiment includes a fixed bracket 1, a movable bracket 2, a plurality of movable rib bar components 3a, and a plurality of fixed rib bar components 3b.

[0061] The fixed bracket 1 surrounds and forms a main support space 101, and each of the fixed rib strip assemblies 3b is installed in the main support space 101. The movable bracket 2 surrounds and forms a secondary support space 201, and the movable bracket 2 has a storage state stored in the main support space 101, and has an expanded state extending out of the main support space 101.

[0062] When the movable bracket 2 is in the storage state, the main support space 101 and the secondary support space 201 overlap, and both ends of each movable rib bar assembly 3a can be removably installed on the fixed bracket 1; when the movable bracket 2 is in the expanded state, the secondary support space 201 is located outside the main support space 101, and one end of each movable rib bar assembly 3a can be removably installed on the fixed bracket 1, and the other end can be removably installed on the movable bracket 2.

[0063] The switchable row frame provided in this embodiment has a smaller overall width when the movable bracket 2 is switched to a storage state stored in the main support space 101, and can be used as a single-row row frame; when the movable bracket 2 is switched to an expanded state extending outside the main support space 101, the overall width is larger, and can be used as a double-row row frame.

[0064] Therefore, the switchable slat frame provided by the present invention can switch between the state of supporting a single person and the state of supporting multiple people, thereby meeting the diverse usage needs of users.

[0065] In this embodiment, the movable bracket 2 includes two right-angle pieces 202 and intermediate connecting pieces 203 respectively connected to the two right-angle pieces 202 in a sliding manner. The two right-angle pieces 202 have a retracted state in which they slide close to each other along the intermediate connecting piece 203, so that the length of the movable bracket 2 is smaller than the length of the main support space 101; and have an extended state in which they slide away from each other along the intermediate connecting piece 203, so that the length of the movable bracket 2 is equal to the length of the fixed bracket 1.

[0066] Furthermore, the intermediate connecting member 203 is provided with two first spring steel balls 2031 and two second spring steel balls 2032 located between the two first spring steel balls 2031, and the right angle member 202 is provided with a steel ball hole. When the two right angle members 202 are in the extended state, each of the first spring steel balls 2031 is inserted into the steel ball hole of one of the right angle members 202; when the two right angle members 202 are in the retracted state, each of the second spring steel balls 2032 is inserted into the steel ball hole of one of the right angle members 202. In this way, the relative positioning of the right angle member 202 and the intermediate connecting member 203 in the extended state and the retracted state can be achieved.

[0067] In this embodiment, the fixed bracket 1 includes a fixed U-shaped frame 102 surrounding the main support space 101, and a track π-shaped frame 103 fixed under the fixed U-shaped frame 102; wherein the two right-angle pieces 202 are both slidably connected to the track π-shaped frame 103.

[0068] Specifically, the fixed U-shaped frame 102 includes two mutually parallel fixed cross beams 1021 and a fixed longitudinal beam 1022 connecting the two fixed cross beams 1021. The track π-shaped frame 103 includes two mutually parallel track cross beams 1031 and a track longitudinal beam 1032 connecting the two track cross beams 1031. Each of the fixed rib strip assemblies 3b is located in the main support space 101, with one end mounted on the fixed longitudinal beam 1022 and the other end mounted on the track longitudinal beam 1032.

[0069] The distance between the two track beams 1031 is smaller than the distance between the two fixed beams 1021 , so that the two track longitudinal beams 1032 are located directly below the main support space 101 ;

[0070] The end positions of the track crossbeam 1031 and the track longitudinal beam 1032 protrude outward from the track crossbeam 1031 and form an outer protrusion 1032a; the upper surfaces of each track crossbeam 1031 and the adjacent outer protrusion 1032a form an L-shaped groove 1033; each right-angle piece 202 is slidably connected to the track π-shaped frame 103 via an L-shaped groove 1033.

[0071] A plurality of I-shaped guide sliders 104 are provided in the L-shaped slide groove 1033, and a straight slide groove 2021 is provided at the bottom of the right-angle piece 202; the lower end of the I-shaped guide slider 104 is inserted into the L-shaped slide groove 1033, and the upper end is slidably connected to the straight slide groove 2021, thereby allowing the right-angle piece 202 to slide along the L-shaped slide groove 1033.

[0072] Specifically, when it is necessary to switch from the unfolded state to the retracted state, all the movable rib strip assemblies 3a are first disassembled, and then the two right-angle pieces 202 are slid along the middle connecting piece 203 to the retracted state. At this time, the length dimension of the movable bracket 2 is smaller than the length dimension of the main support space 101, and then the entire movable bracket 2 can be pushed into the main support space 101 along the track crossbeam 1031; finally, the two ends of the movable rib strip assembly 3a are respectively installed to the fixed longitudinal beam 1022 and the track longitudinal beam 1032 (optionally, one movable rib strip assembly 3a is installed between every two fixed rib strip assemblies 3b);

[0073] When it is necessary to switch from the storage state to the unfolded state, first push the movable bracket 2 outward so that the movable bracket 2 extends to the outside of the fixed bracket 1, then slide the two right-angle pieces 202 along the middle connecting piece 203 to the outward expansion state, and when in the outward expansion state, the length dimension of the movable bracket 2 is equal to the length dimension of the fixed bracket 1, so the fixed bracket 1 and the movable bracket 2 form a completely regular frame; then remove all the movable rib bar assemblies 3a from the fixed bracket 1, and then install one end of the movable rib bar assembly 3a to the track longitudinal beam 1032, and the other end to the right-angle piece 202.

[0074] It should be noted that during the entire state expansion and switching process, the track beam 1031 always slides above the fixed beam 1021 and the outer protrusion 1032a, and the entire sliding process is well supported by the track π-shaped frame 103, which is conducive to improving the smoothness and stability of the sliding.

[0075] See also Figure 4 and Figure 5 In this embodiment, both the movable rib bar assembly 3a and the fixed rib bar assembly 3b include a rib bar body 301, a first connecting member 302, and a second connecting member 303.

[0076] One end of the first connector 302 is provided with a first socket for inserting one end of the rib strip body 301, and the other end is provided with a hook portion 3021 for clamping with the track longitudinal beam 1032. The bottom surface of the track longitudinal beam 1032 is provided with a hook groove 1032b for the hook portion 3021 to be clamped into, and the side position of the track longitudinal beam 1032 is provided with a buckle 1032c for clamping with the middle position of the first connector 302. The first connector 302 can be installed and positioned by clamping the hook portion 3021 into the hook groove 1032b and clamping the buckle 1032c to clamp the middle position of the first connector 302.

[0077] One end of the second connecting member 303 is provided with a second socket for inserting the other end of the pork rib strip body 301, and the other end is provided with a spring pin 3031. Correspondingly, the inner sides of both the fixed longitudinal beam 1022 and the right-angle member 202 are provided with a pin groove 105 for inserting the spring pin 3031. The installation and positioning of the second connecting member 303 can be completed by inserting the spring pin 3031 into the pin groove 105.

[0078] Of course, in some other embodiments, the first connecting member 302 and the second connecting member 303 may also be fastened and installed on the fixed bracket 1 or the movable bracket 2 by means of locking bolts, etc., and the present invention is not limited to this.

[0079] In summary, the switchable rack frame provided in this embodiment has the following beneficial effects:

[0080] ① Switching the movable bracket 2 to the storage state stored in the main support space 101 can be used as a single-row frame, and switching the movable bracket 2 to the expanded state extending outside the main support space 101 can be used as a double-row frame, thereby meeting the diverse usage needs of users;

[0081] ② It can be packaged and transported in the storage state, thus saving packaging and transportation costs.

[0082] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A switchable rack frame, characterized in that: include: A fixed support (1), the fixed support (1) enclosing and forming a main support space (101); A movable bracket (2), the movable bracket (2) having a stored state in which it is stored in the main support space (101), and an expanded state in which it is extended to the outside of the main support space (101); A plurality of movable rib strip assemblies (3a), wherein when the movable bracket (2) is in the stored state, both ends of each movable rib strip assembly (3a) can be detachably mounted to the fixed bracket (1); when the movable bracket (2) is in the deployed state, one end of each movable rib strip assembly (3a) can be detachably mounted to the fixed bracket (1), and the other end can be detachably mounted to the movable bracket (2).

2. The switchable rack frame according to claim 1, characterized in that: The movable bracket (2) comprises two right-angle pieces (202) and an intermediate connecting piece (203) respectively slidably connected to the two right-angle pieces (202); The two right-angle pieces (202) are in a retracted state where they slide toward each other along the intermediate connecting piece (203), such that the length dimension of the movable bracket (2) is smaller than the length dimension of the main supporting space (101); and in an extended state where they slide away from each other along the intermediate connecting piece (203), such that the length dimension of the movable bracket (2) is equal to the length dimension of the fixed bracket (1).

3. The switchable rack frame according to claim 2, characterized in that: The intermediate connecting piece (203) is provided with two first spring steel balls (2031), and two second spring steel balls (2032) located between the two first spring steel balls (2031), and the right-angle piece (202) is provided with a steel ball hole; When the two right-angle pieces (202) are in the extended state, each of the first spring steel balls (2031) is inserted into a steel ball hole of one of the right-angle pieces (202); When the two right-angle pieces (202) are in the retracted state, each of the second spring steel balls (2032) is inserted into a steel ball hole of one of the right-angle pieces (202).

4. The switchable rack frame according to claim 3, characterized in that: The fixed support (1) comprises a fixed U-shaped frame (102) surrounding and forming the main support space (101), and a track π-shaped frame (103) fixedly arranged below the fixed U-shaped frame (102); Wherein, the two right-angle pieces (202) are both slidably connected to the track π-shaped frame (103).

5. The switchable rack frame according to claim 4, characterized in that: The fixed U-shaped frame (102) comprises two fixed crossbeams (1021) parallel to each other, and a fixed longitudinal beam (1022) connecting the two fixed crossbeams (1021); The track π-shaped frame (103) comprises two track crossbeams (1031) parallel to each other, and a track longitudinal beam (1032) connecting the two track crossbeams (1031); The distance between the two track beams (1031) is smaller than the distance between the two fixed beams (1021), so that the two track longitudinal beams (1032) are both located directly below the main support space (101); The end positions of the track crossbeam (1031) and the track longitudinal beam (1032) protrude outward from the track crossbeam (1031) and form an outer protrusion (1032a); the upper surfaces of each track crossbeam (1031) and the adjacent outer protrusion (1032a) form an L-shaped sliding groove (1033); and each right-angle piece (202) is slidably connected to the track π-shaped frame (103) via one of the L-shaped sliding grooves (1033).

6. The switchable rack frame according to claim 5, characterized in that: A plurality of I-shaped guide slide blocks (104) are arranged in the L-shaped slide groove (1033), and a straight slide groove (221) is arranged at the bottom of the right-angle piece (202); The lower end of the I-shaped guide slide block (104) is inserted into the L-shaped slide groove (1033), and the upper end is slidably connected to the straight slide groove (2021).

7. The switchable rack frame according to claim 5, characterized in that: Also includes: A plurality of fixed rib bar assemblies (3b), each of the fixed rib bar assemblies (3b) is located in the main support space (101), one end of each fixed rib bar assembly is mounted on the fixed longitudinal beam (1022), and the other end of each fixed rib bar assembly (1032) is mounted on the track longitudinal beam (1032).

8. The switchable rack frame according to claim 7, characterized in that: Both the movable rib strip assembly (3a) and the fixed rib strip assembly (3b) comprise: Spare rib strip body (301); A first connecting member (302), wherein one end of the first connecting member (302) is provided with a first socket for inserting one end of the pork rib strip body (301), and the other end is provided with a hook portion (3021) for clamping with the track longitudinal beam (1032); A second connecting piece (303), one end of which is provided with a second socket for inserting the other end of the spare rib strip body (301), and the other end of which is provided with a spring latch (3031).

9. The switchable rack frame according to claim 8, characterized in that: The bottom surface of the track longitudinal beam (1032) is provided with a hook groove (1032b) for the hook portion (3021) to be snapped into, and the side surface of the track longitudinal beam (1032) is provided with a buckle (1032c) that is snap-connected with the middle portion of the first connecting member (302).

10. The switchable rack frame according to claim 8, characterized in that: The inner sides of both the fixed longitudinal beam (1022) and the right-angle piece (202) are provided with a latch groove (105) for inserting the spring latch (3031).