Foldable cabinet

Abstract

Provided is a foldable cabinet including a bottom panel, side panels, and a rear panel. One side panel is hinged to an openable front frame, which plugs into the other side panel and locks via a first locking structure. The rear panel includes first and second rear panels, each hinged to one side panel and mutually hinged together. The bottom panel is hinged to one side panel and abuts the other, allowing flipping only inward. This design solves the problem of excessive storage space occupation in gap cabinets.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application is a Continuation in part of U.S. application Ser. No. 18 / 972,750 filed Dec. 6, 2024. This application claims priority to Chinese Patent Application No. 202620836573.6, filed on Jun. 8, 2026, which is hereby incorporated by reference in its entirety.TECHNICAL FIELD

[0002] The present application relates to household products. More specifically, the present application relates to foldable cabinet.BACKGROUND

[0003] When decorating their homes, people often encounter narrow spaces that cannot accommodate regular furniture, leading to wasted potential. To address this issue, the gap cabinet was created. This type of storage cabinet features a slim design specifically intended for placement in these tight areas, allowing homeowners to maximize their storage options.

[0004] Gap cabinets currently available require significant space for storage, resulting in increased costs and reduced economic benefits in warehousing and logistics.SUMMARY

[0005] The present application provides a foldable cabinet to at least solve the technical problem in the prior art that the gap cabinet occupies a large space after being stored.

[0006] To achieve the purpose mentioned above, the present application provides a foldable cabinet, including a bottom panel, side panels and a rear panel, wherein the side panel on one side is hinged to an openable and closable front frame, and the other end of the front frame is in plug-in fit with the side panel on the other side and is provided with a first locking structure for locking engagement with the side panel on said other side; the rear panel includes a first rear panel and a second rear panel, the first rear panel is hinged to the side panel on one side, the second rear panel is hinged to the side panel on the other side, and the first rear panel and the second rear panel are hinged to each other; the bottom panel is hinged to the side panel on one side and abuts against the side panel on the other side so that the bottom panel is only allowed to be flipped toward the inside of the foldable cabinet.

[0007] In some embodiments, a cover panel is provided at an upper end of the foldable cabinet, the side panels, the rear panel and the front frame are each provided with plug-in portions for engagement with the cover panel, and the side panels are each provided with a second locking structure for locking engagement with the cover panel.

[0008] In some embodiments, each second locking structure includes a second locking member disposed at an upper end of the side panel and a second locking portion disposed on the cover panel for locking engagement with the second locking member.

[0009] In some embodiments, a lower end of each of the two side panels is provided with the second locking portion for locking engagement with the second locking member of another foldable cabinet during stacking.

[0010] In some embodiments, the first locking structure includes buckles and buckle grooves which are disposed between the front frame and the side panel, and the front frame is secured to the side panel when the buckles engage with the buckle grooves.

[0011] In some embodiments, the buckle grooves are arranged on an edge of the front frame and extend in a height direction of the front frame, and the buckles are arranged on and protrude from an edge of the side panel adjacent to the front frame.

[0012] In some embodiments, a plurality of inserting ribs extending outward are disposed on a front edge of the side panel, and the buckles are arranged on the inserting ribs, insertion slots mating with the inserting ribs are provided on an edge of the front frame corresponding to the inserting ribs, and the buckle grooves are arranged on a wall of the insertion slots; when the front frame is secured to the side panel, the inserting ribs are inserted into the insertion slots, and the buckles simultaneously engage with the buckle grooves.

[0013] A foldable cabinet includes a bottom panel, two side panels on left and right sides of the bottom panel, a rear panel and a front frame, wherein the rear panel includes a first rear panel and a second rear panel, the first rear panel is hinged to the side panel on one side, the second rear panel is hinged to the side panel on the other side, and the first rear panel and the second rear panel are hinged to each other; the bottom panel is hinged to the side panel on one side and abuts against the side panel on the other side so that the bottom panel is only allowed to be flipped toward the inside of the foldable cabinet;

[0014] sliding grooves extending in a front-rear direction and rotating shafts slidably fitted in the sliding grooves are arranged between left and right sides of the front frame and the two side panels, and the cooperation between the rotating shafts and the sliding grooves enables the front frame to move back and forth relative to the side panels;

[0015] a third locking structure is disposed between the front frame and each of the two side panels to lock the front frame at a position closely fitted against the side panel;

[0016] after the third locking structures are unlocked, the front frame is pulled to move forward by a preset distance, and the rotating shaft on one side is manually disengaged from the corresponding sliding groove and in this case, the rotating shaft on the other side is still fitted in the corresponding sliding groove, such that the front frame is rotated around the rotating shaft and folded.

[0017] In some embodiments, the third locking structure includes a locking groove and a locking member which are disposed between the front frame and each side panel; when the front frame and the side panel are in a locked state, the locking member is inserted into the locking groove to complete locking.

[0018] In some embodiments, the locking member is a cylinder disposed on a front edge of the side panel and extending in a height direction; the locking groove is arranged on the front frame and opens toward the side panel; the locking groove includes a U-shaped groove close to the cylinder and a C-shaped groove away from the cylinder, which are in communication with each other; an opening of the C-shaped groove is smaller than a diameter of the cylinder; when the front frame and the side panel are in a locked state, the cylinder passes through the U-shaped groove and is received in the C-shaped groove, so that the locking member and the locking groove are locked by interference fit.

[0019] In some embodiments, each side panel is provided with a guide groove opening toward the front frame, and the front frame is provided with guide blocks inserted into the guide grooves; each rotating shaft is arranged at an outer end of the corresponding guide groove, and each sliding groove is arranged on the corresponding guide block.

[0020] In some embodiments, a first chamfered surface is provided at an insertion end of each guide block, and each rotating shaft is provided with a second chamfered surface; when each guide block is inserted into the corresponding guide groove, the first chamfered surface of the guide block comes into contact with the second chamfered surface of the corresponding rotating shaft to bring about adaptive deformation of the guide block, such that the rotating shaft passes over the guide block and slides into the sliding groove, while the guide block is seated in the guide groove.

[0021] In some embodiments, a cover panel is provided at an upper end of the foldable cabinet, the side panels, the rear panel and the front frame are each provided with plug-in portions for engagement with the cover panel, and when the front frame and the two side panels are fitted with the cover panel by means of the plug-in portions, positions of the front frame and the two side panels are restrained by the cover panel, so that the front frame cannot be separated from the side panels.

[0022] In some embodiments, each side panel is provided with a second locking structure for locking engagement with the cover panel, and each second locking structure includes a second locking member disposed at an upper end of the corresponding side panel and a second locking portion disposed on the cover panel for locking engagement with the second locking member.

[0023] In some embodiments, a lower end of each of the two side panels is provided with the second locking portion for locking engagement with the second locking member of another foldable cabinet during stacking.

[0024] Based on the above description, the beneficial effects of the present application are as follows:

[0025] 1. The rear panel and bottom panel of the foldable cabinet can be folded toward the inside of the foldable cabinet. After the rear panel and the bottom panel are folded, the front frame hinged to the side panels can be flipped to the other side panel for further folding and storage. This design saves storage space and reduces logistics costs.

[0026] 2. A first locking structure is disposed away from the side of the front frame hinged to the side panel. The first locking structure can lock the front frame to the other side panel, thereby improving the stability of the foldable cabinet in an unfolded state.BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings described herein are provided for further understanding of the present application and constitute a part thereof. The illustrative embodiments and descriptions thereof are intended to explain the present application, and shall not be construed as any limitation of the present application. In the drawings:

[0028] FIG. 1 is a schematic overall structural view of a foldable cabinet according to an embodiment of the present application;

[0029] FIG. 2 is an internal structural view of the foldable cabinet according to the embodiment of the present application;

[0030] FIG. 3 is another internal structural view of the foldable cabinet according to the embodiment of the present application;

[0031] FIG. 4 is a schematic view showing the engagement between a first locking member and a first locking portion according to the embodiment of the present application;

[0032] FIG. 5 is a schematic structural view of another first locking structure of the foldable cabinet according to the present application;

[0033] FIG. 6 is an exploded view of FIG. 5;

[0034] FIG. 7 is a schematic structural view of another foldable cabinet according to the present application;

[0035] FIG. 8 is a schematic structural view showing a front frame and side panels in FIG. 7 in a locked state with a cover panel removed;

[0036] FIG. 9 is a schematic structural view showing the front frame and the cover panel in an unlocked state after the front frame is moved forward by a preset distance;

[0037] FIG. 10 is a cross-sectional view of FIG. 8;

[0038] FIG. 11 is a cross-sectional view of FIG. 9;

[0039] FIG. 12 is an enlarged view of a locking groove on the front frame; and

[0040] FIG. 13 is an enlarged view of a cylinder and a rotating shaft.REFERENCE NUMERALS1. bottom panel; 2. side panel; 21. cylinder; 3.1. first rear panel; 3.2. second rear panel; 4. front frame; 4.1. hinged portion; 4.2. cabinet door; 4.3. locking groove; 4.31. U-shaped groove; 4.32. C-shaped groove; 5. cover panel; 6.1. first locking member; 6.1.1. clipping portion; 6.2. first locking portion; 63. buckle; 64. buckle groove; 65. inserting rib; 66. insertion slot; 7. plug-in portion; 71. guide groove; 711. rotating shaft; 712. second chamfered surface; 72. guide block; 721. sliding groove; 722. first chamfered surface; 8.1. second locking member; 8.2. second locking portion; 9. partition plate; 9.1. abutment portion.DESCRIPTION OF EMBODIMENTS

[0042] The present application provides a foldable cabinet, including a bottom panel, side panels and a rear panel, wherein the side panel on one side is hinged to an openable and closable front frame, and the other end of the front frame is in plug-in fit with the side panel on the other side and is provided with a first locking structure for locking engagement with the side panel on said other side; the rear panel includes a first rear panel and a second rear panel, the first rear panel is hinged to the side panel on one side, the second rear panel is hinged to the side panel on the other side, and the first rear panel and the second rear panel are hinged to each other; the bottom panel is hinged to the side panel on one side and abuts against the side panel on the other side so that the bottom panel is only allowed to be flipped toward the inside of the foldable cabinet.

[0043] An embodiment, as shown in FIGS. 1-4, provides a foldable cabinet, including a bottom panel 1, side panels 2, a rear panel, a front frame 4 and a cover panel 5. The rear panel includes a first rear panel 3.1 and a second rear panel 3.2, the first rear panel 3.1 is hinged to the side panel 2 on one side, the second rear panel 3.2 is hinged to the side panel 2 on the other side, the first rear panel 3.1 and the second rear panel 3.2 are hinged to each other, so that the rear panel is only allowed to be folded and stored toward the inside of the foldable cabinet. The bottom panel 1 is hinged to the side panel 2 on one side and abuts against the side panel 2 on the other side, so that the bottom panel 1 is only allowed to be flipped and stored toward the inside of the foldable cabinet.

[0044] Further, one end of the front frame 4 is hinged to the side panel 2 on one side, allowing the front frame 4 to be opened and closed relative to the foldable cabinet. The other end of the front frame 4 is in plug-in fit with and secured to the side panel 2 on the other side and is provided with a first locking structure for locking engagement with the side panel 2 on said other side. The first locking structure includes a first locking member 6.1, which is hinged to a side of the front frame 4 and positioned near the inside of the foldable cabinet. The first locking structure also includes a first locking portion 6.2 located on the inner side of the side panel 2, which aligns with the first locking member 6.1 to lock the front frame 4 in place. The front frame 4 can be locked or unlocked simply by flipping the first locking member 6.1.

[0045] Specifically, the first locking portion 6.2 protrudes relative to the side panel 2. The first locking member 6.1 includes a clipping section 6.1.1 at one end adjacent to the first locking portion. The clipping section 6.1.1 extends towards the first locking portion 6.2 and engages with the first locking portion 6.2. In this design, the first locking members 6.1 are arranged longitudinally on the side of the front frame 4. At least two first locking members 6.1 are provided. In this specific embodiment, there are two first locking members.

[0046] Further, the side of the front frame 4 is provided with hinged portions 4.1 for hinged engagement with the side panels 2. The hinged portions 4.1 are arranged longitudinally and protrude toward the side panels 2. There are at least three hinged portions 4.1 arranged longitudinally. Three hinged portions 4.1 are provided in this specific embodiment.

[0047] Further, a cabinet door 4.2 that can be opened and closed is hinged to the front frame 4.

[0048] Further, the upper ends of the side panels 2, the rear panel and the front frame 4 are each provided with plug-in portions 7 for engagement with the cover panel 5. The cover panel 5 is arranged at the upper end of the foldable cabinet, and the plug-in portions 7 are inserted into the cover panel 5.

[0049] Further, the left and right side panels 2 are each provided with a second locking structure for locking engagement with the cover panel 5. Each second locking structure includes a second locking member 8.1 hinged to the upper end of the side panel 2 and a second locking portion 8.2 disposed on the cover panel 5 for locking engagement with the second locking member 8.1. The cover panel 5 can be locked and unlocked by flipping the second locking members 8.1.

[0050] Further, the lower end of each side panel 2 is also provided with a second locking portion 8.2 for locking engagement with the second locking member 8.1 of another foldable cabinet when the cabinets are stacked.

[0051] Further, a detachable partition panel 9 is horizontally arranged inside the foldable cabinet, and abutment portions 9.1 for placing the partition panel 9 are arranged on the side of the side panels 2 and the rear panel close to the inside of the foldable cabinet.

[0052] During folding and storage, first, the partition panel 9 is removed from the foldable cabinet. Next, the second locking member 8.1 and the second locking portion 8.2 are disengaged for unlocking, and then the cover panel 5 can be taken off from the foldable cabinet. After that, the first locking member 6.1 and the first locking portion 6.2 are disengaged. The rear panel and the bottom panel 1 are folded toward the inside of the foldable cabinet. Finally, the front frame 4 that is hinged to one side panel 2 is flipped toward the other side panel 2, which has already been folded and stored.

[0053] In some embodiments of the present disclosure, to fix the front frame 4 to the side panel 2 after rotation, another form of the first locking structure is provided as shown in FIGS. 5 and 6. The first locking structure includes buckles 63 and buckle grooves 64. The buckles 63 are conventional wedge-shaped block buckles. The buckle grooves 64 are arranged on an edge of the front frame 4 and extend in the height direction of the front frame 4. The buckles 63 are arranged on and protrude from an edge of the side panel 2 adjacent to the front frame 4. A plurality of inserting ribs 65 extending outward are arranged on the front edge of the side panel 2 where the buckles 63 are situated. The inserting ribs 65 extend vertically, and the buckles 63 are arranged on some of the inserting ribs 65. Insertion slots 66 for mating with the inserting ribs 65 are disposed on the edge of the front frame 4 corresponding to the inserting ribs 65. The buckle grooves 64 are arranged on the wall of the insertion slots 66 and penetrate the wall of the insertion slots 66. When the front frame 4 is secured to the side panel 2, the inserting ribs 65 are inserted into the insertion slots 66 and the buckles 63 are engaged with the buckle grooves 64 simultaneously.

[0054] Further, the above embodiment may be modified. The buckles 63 may be arranged on the wall of the insertion slots 66 of the front frame 4, and the buckle grooves 64 may be arranged on the inserting ribs 65 accordingly. (This alternative solution is not shown in the drawings.)

[0055] As shown in FIGS. 7-13, the present application further provides another foldable cabinet, including a bottom panel 1, side panels 2, a rear panel, a front frame 4 and a cover panel 5. The rear panel includes a first rear panel 3.1 and a second rear panel 3.2, the first rear panel 3.1 is hinged to the side panel 2 on one side, the second rear panel 3.2 is hinged to the side panel 2 on the other side, the first rear panel 3.1 and the second rear panel 3.2 are hinged to each other, so that the rear panel is only allowed to be folded and stored toward the inside of the foldable cabinet. The bottom panel 1 is hinged to the side panel 2 on one side and abuts against the side panel 2 on the other side, so that the bottom panel 1 is only allowed to be flipped and stored toward the inside of the foldable cabinet.

[0056] Guide blocks 72 extending toward the two side panels 2 are disposed on the left and right sides of the top and bottom of the front frame 4. A sliding groove 721 extending in the front-rear direction is disposed at the bottom of each guide block 72. Rotating shafts 711 are disposed at the front ends of the top and bottom of the two side panels 2. The rotating shafts 711 are slidably fitted in the sliding grooves 721. Moreover, guide grooves 71 which extend in the front-rear direction and open toward the front frame 4 are disposed on the top of the two side panels 2 and the bottom panel, and each rotating shaft 711 is arranged at the outer end of the corresponding guide groove 71. The guide blocks 72 of the front frame 4 are inserted into the guide grooves 71 and form a sliding fit therewith, so that the front frame 4 can move back and forth relative to the two side panels 2.

[0057] An insertion end of each guide block 72 is provided with a first chamfered surface 722, and each rotating shaft 711 is provided with a second chamfered surface 712. When each guide block 72 is inserted into the corresponding guide groove 71, the first chamfered surface 722 of the guide block 72 comes into contact with the second chamfered surface 712 of the corresponding rotating shaft 711 to bring about adaptive deformation of the guide block 72, such that the rotating shaft 711 passes over the guide block 72 and slides into the corresponding sliding groove 721, while the guide block 72 slides into the guide groove 71.

[0058] A third locking structure is disposed between the front frame 4 and each of the two side panels 2 to lock the front frame 4 at a position closely fitted against the side panel 2.

[0059] As shown in FIGS. 10-12, the third locking structure includes a locking groove 43 and a locking member which are disposed between the front frame 4 and each side panel 2. The locking member is a cylinder 21 disposed on a front edge of the side panel 2 and extending in a height direction; the locking groove 43 is arranged on the front frame and opens toward the side panel 2; the locking groove 43 includes a U-shaped groove 431 close to the cylinder 21 and a C-shaped groove 432 away from the cylinder 21, which are in communication with each other; an opening of the C-shaped groove 432 is smaller than a diameter of the cylinder 21.

[0060] During assembly of the front frame 4 and the side panel 2, the front frame 4 and the side panel 2 are moved close to each other. When the cylinder 21 passes through the U-shaped groove 431 and is received in the C-shaped groove 432, the front frame 4 is closely fitted against the side panel 2, and the cylinder 21 serving as the locking member also comes into interference fit with the C-shaped groove 432 of the locking groove 43, whereby the front frame 4 and the side panel 2 are in a locked state.

[0061] To detach the front frame 4 from the side panels 2, the front frame 4 is pulled outward and moved forward by a preset distance, such that the cylinders 21 are disengaged from the locking grooves 43, thus unlocking the third locking structures. The rotating shaft 711 on one side panel 2 can then be manually disengaged from the corresponding sliding groove 721, so that the front frame 4 is completely detached from this side panel 2. In this case, the rotating shaft 711 on the other side panel 2 is still fitted in the corresponding sliding groove 721, and the front frame 4 can be rotated around the rotating shaft 711, such that the front frame 4 is rotated and folded toward the inside thereof.

[0062] As shown in FIGS. 7, 8 and 9, the side panels 2, the rear panel 3 and the front frame 4 are each provided with plug-in portions 7 for engagement with the cover panel 5. When the plug-in portions 7 of the side panels 2, the rear panel 3 and the front frame 4 are inserted into the cover panel 5 at the top, the side panels 2, the rear panel 3 and the front frame 4 jointly form a rectangular frame structure. Moreover, since the plug-in portions 7 at the top of the front frame 4 are secured to the cover panel 5, the front frame 4 and the side panels 2 are both restrained by the cover panel 5 and cannot move, thereby further locking the front frame 4 and the side panels 2.

[0063] Further, the left and right side panels 2 are each provided with a second locking structure for locking engagement with the cover panel 5. Each second locking structure includes a second locking member 8.1 hinged to the upper end of the side panel 2 and a second locking portion 8.2 disposed on the cover panel 5 for locking engagement with the second locking member 8.1. The cover panel 5 can be locked and unlocked by flipping the second locking members 8.1.

[0064] Further, the lower end of each side panel 2 is also provided with a second locking portion 8.2 for locking engagement with the second locking member 8.1 of another foldable cabinet when the cabinets are stacked.

[0065] Further, a detachable partition panel 9 is horizontally arranged inside the foldable cabinet, and abutment portions 9.1 for placing the partition panel 9 are arranged on the side of the side panels 2 and the rear panel close to the inside of the foldable cabinet.

[0066] During folding and storage, first, the partition panel 9 is removed from the foldable cabinet. Next, the second locking member 8.1 and the second locking portion 8.2 are disengaged for unlocking, and then the cover panel 5 can be taken off from the foldable cabinet. After that, the front frame 4 is pulled outward to disengage the cylinders 21 from the locking grooves 43. The rotating shaft 711 on one side panel 2 is then manually disengaged from the corresponding sliding groove 721, so that the front frame 4 is completely detached from this side panel 2. In this case, the rotating shaft 711 on the other side panel 2 is still fitted in the corresponding sliding groove 721 and the front frame 4 can be rotated around the rotating shaft 711, such that the front frame 4 is rotated and folded toward the inside thereof. Finally, the rear panel and the bottom panel 1 are folded toward the inside of the foldable cabinet.

Claims

1. A foldable cabinet, comprising a bottom panel, side panels on left and right sides of the bottom panel, and a rear panel, wherein the side panel on one side is hinged to an openable and closable front frame, and the other end of the front frame is in plug-in fit with the side panel on the other side and is provided with a first locking structure for locking engagement with the side panel on said other side; the rear panel comprises a first rear panel and a second rear panel, the first rear panel is hinged to the side panel on one side, the second rear panel is hinged to the side panel on the other side, and the first rear panel and the second rear panel are hinged to each other;the bottom panel is hinged to the side panel on one side and abuts against the side panel on the other side so that the bottom panel is only allowed to be flipped toward the inside of the foldable cabinet.

2. The foldable cabinet according to claim 1, wherein a cover panel is provided at an upper end of the foldable cabinet, the side panels, the rear panel and the front frame are each provided with plug-in portions for engagement with the cover panel, and the side panels are each provided with a second locking structure for locking engagement with the cover panel.

3. The foldable cabinet according to claim 2, wherein each second locking structure comprises a second locking member disposed at an upper end of the side panel and a second locking portion disposed on the cover panel for locking engagement with the second locking member.

4. The foldable cabinet according to claim 3, wherein a lower end of each of the two side panels is provided with the second locking portion for locking engagement with the second locking member of another foldable cabinet during stacking.

5. The foldable cabinet according to claim 1, wherein the first locking structure comprises buckles and buckle grooves which are disposed between the front frame and the side panel, and the front frame is secured to the side panel when the buckles engage with the buckle grooves.

6. The foldable cabinet according to claim 5, wherein the buckle grooves are arranged on an edge of the front frame and extend in a height direction of the front frame, and the buckles are arranged on and protrude from an edge of the side panel adjacent to the front frame.

7. The foldable cabinet according to claim 6, wherein a plurality of inserting ribs extending outward are disposed on a front edge of the side panel, and the buckles are arranged on the inserting ribs, insertion slots mating with the inserting ribs are provided on an edge of the front frame corresponding to the inserting ribs, and the buckle grooves are arranged on a wall of the insertion slots; when the front frame is secured to the side panel, the inserting ribs are inserted into the insertion slots, and the buckles simultaneously engage with the buckle grooves.

8. A foldable cabinet, comprising a bottom panel, two side panels on left and right sides of the bottom panel, a rear panel and a front frame, wherein the rear panel comprises a first rear panel and a second rear panel, the first rear panel is hinged to the side panel on one side, the second rear panel is hinged to the side panel on the other side, and the first rear panel and the second rear panel are hinged to each other; the bottom panel is hinged to the side panel on one side and abuts against the side panel on the other side so that the bottom panel is only allowed to be flipped toward the inside of the foldable cabinet;sliding grooves extending in a front-rear direction and rotating shafts slidably fitted in the sliding grooves are arranged between left and right sides of the front frame and the two side panels, and the cooperation between the rotating shafts and the sliding grooves enables the front frame to move back and forth relative to the side panels;a third locking structure is disposed between the front frame and each of the two side panels to lock the front frame at a position closely fitted against the side panel;after the third locking structures are unlocked, the front frame is pulled to move forward by a preset distance, and the rotating shaft on one side is manually disengaged from the corresponding sliding groove and in this case, the rotating shaft on the other side is still fitted in the corresponding sliding groove, such that the front frame is rotated around the rotating shaft and folded.

9. The foldable cabinet according to claim 8, wherein the third locking structure comprises a locking groove and a locking member which are disposed between the front frame and each side panel; when the front frame and the side panel are in a locked state, the locking member is inserted into the locking groove to complete locking.

10. The foldable cabinet according to claim 9, wherein the locking member is a cylinder disposed on a front edge of the side panel and extending in a height direction;the locking groove is arranged on the front frame and opens toward the side panel; the locking groove comprises a U-shaped groove close to the cylinder and a C-shaped groove away from the cylinder, which are in communication with each other; an opening of the C-shaped groove is smaller than a diameter of the cylinder; when the front frame and the side panel are in a locked state, the cylinder passes through the U-shaped groove and is received in the C-shaped groove, so that the locking member and the locking groove are locked by interference fit.

11. The foldable cabinet according to claim 8, wherein each side panel is provided with a guide groove opening toward the front frame, and the front frame is provided with guide blocks inserted into the guide grooves; each rotating shaft is arranged at an outer end of the corresponding guide groove, and each sliding groove is arranged on the corresponding guide block.

12. The foldable cabinet according to claim 11, wherein a first chamfered surface is provided at an insertion end of each guide block, and each rotating shaft is provided with a second chamfered surface; when each guide block is inserted into the corresponding guide groove, the first chamfered surface of the guide block comes into contact with the second chamfered surface of the corresponding rotating shaft to bring about adaptive deformation of the guide block, such that the rotating shaft passes over the guide block and slides into the sliding groove, while the guide block is seated in the guide groove.

13. The foldable cabinet according to claim 8, wherein a cover panel is provided at an upper end of the foldable cabinet, the side panels, the rear panel and the front frame are each provided with plug-in portions for engagement with the cover panel, and when the front frame and the two side panels are fitted with the cover panel by means of the plug-in portions, positions of the front frame and the two side panels are restrained by the cover panel, so that the front frame cannot be separated from the side panels.

14. The foldable cabinet according to claim 13, wherein each side panel is provided with a second locking structure for locking engagement with the cover panel, and each second locking structure comprises a second locking member disposed at an upper end of the corresponding side panel and a second locking portion disposed on the cover panel for locking engagement with the second locking member.

15. The foldable cabinet according to claim 14, wherein a lower end of each of the two side panels is provided with the second locking portion for locking engagement with the second locking member of another foldable cabinet during stacking.

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