Buckle capable of being automatically buckled to increase expansion space

Abstract

A buckle capable of being automatically buckled to increase the expansion space comprises a fixing piece used for being installed on the inner wall of a refrigerator, a supporting sliding block is arranged on the fixing piece in the length direction of the fixing piece in a sliding mode, and a plurality of positioning parts are arranged on the fixing piece in the length direction. The supporting sliding block is provided with a positioning block which can abut against the positioning part to position the supporting sliding block, the supporting sliding block is provided with a supporting groove, the upper end of the supporting groove is provided with an opening, one end of the shelf can be placed in the supporting groove and used for supporting the shelf, and the positioning block is rotationally provided with a locking buckle which can abut against the shelf to lock the shelf. The locking buckle or the positioning block or the supporting sliding block is provided with a rotating power piece capable of enabling the locking buckle to rotate in the direction of the locking layer frame, and the supporting sliding block is provided with a locking piece capable of locking the positioning block when the positioning block is pressed against the positioning part. The installation space can be saved, automatic locking is achieved, and use is convenient; the positioning block is in linkage with the locking buckle, when the positioning block rotates to unlock the positioning block, the locking buckle can be driven to be switched to unlock the shelf, and use is convenient.

Description

[Technical field]

[0001] The utility model relates to a buckle of a supporting shelf in a freezer. [Background technology]

[0002] Generally, freezers (refrigerators, refrigerators, etc.) place items by setting up shelves, and the height between the shelves determines the height at which the items can be placed. However, the height of the items is different, so the shelves need to be adjustable. In order to prevent the shelves from falling off, the shelves usually need to be locked. The adjustable shelves on the market, such as the patent number 202321846033.9, are named a freezer shelf mounting buckle, which closes the upper opening of the shelf installation position through a shelf locking piece. It is necessary to manually operate the shelf locking piece to close or open the upper opening, and operate the raised clamping part when adjusting up and down. Although the shelf can be locked in this way to prevent the shelf from jumping out, it requires a manual operation cross bar to operate. Therefore, after the shelf is installed, the operating cross bar will occupy the space of the shelf, thereby squeezing out the installation space of the slide, etc., and it is also necessary to manually operate the raised clamping part when adjusting, which is inconvenient to use. [Contents of the utility model]

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a buckle which has a simple structure, is easy to use and can automatically buckle to increase the expansion space.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A buckle that can be automatically buckled to increase expansion space includes a fixing plate for installation on the inner wall of the refrigerator, the fixing plate is slidably provided with a support slider along the length direction of the fixing plate, the fixing plate is provided with a plurality of positioning parts along the length direction, the support slider is provided with a positioning block that can be pressed against the positioning part to position the support slider, the support slider is provided with an upper end opening for one end of a shelf to be placed in a supporting groove for supporting the shelf, the positioning block is rotatably provided with a locking buckle that can be pressed against the shelf to lock the shelf, the locking buckle or the positioning block or the support slider is provided with a rotating power part that can rotate the locking buckle in the direction of locking the shelf, and the support slider is provided with a locking part that can lock the positioning block when the positioning block is pressed against the positioning part.

[0006] As described above, a buckle that can automatically buckle and increase expansion space is provided on the positioning block with a linkage end that can drive the locking buckle to rotate. When the positioning block rotates away from the positioning part to release the positioning, the linkage end drives the locking buckle to rotate and unlock the shelf.

[0007] As described above, in the buckle that can automatically buckle and increase the expansion space, the positioning block is hinged to the supporting slider through a hinge shaft, and the locking buckle is rotatably arranged on the hinge shaft.

[0008] As described above, a buckle that can be automatically buckled to increase the expansion space is provided. The lower end of the locking buckle is provided with a rotating shaft sleeve for the hinge shaft to be inserted, and the positioning block is provided with a locking installation groove for the rotating shaft sleeve to be inserted. The hinge shaft penetrates the locking installation groove and is inserted into the rotating shaft sleeve.

[0009] As described above, a buckle that can be automatically buckled to increase the expansion space, the rotating power part is a torsion spring arranged on the positioning block, which can press the locking buckle to make the locking buckle press the shelf tightly, and the locking buckle is provided with a pressing end for pressing one end of the torsion spring, and the other end of the torsion spring is pressed on the supporting slider, and convex columns are respectively provided on both sides of the positioning block, and the middle part of the torsion spring is sleeved on the convex columns.

[0010] As described above, a buckle that can be automatically buckled to increase the expansion space is provided. The positioning block is provided with a locking end and a positioning end that can be pressed against the positioning part for positioning. The locking piece is buckled on the locking end. The lower end of the supporting slider is provided with a positioning installation groove, and the hinge shaft is inserted into the positioning installation groove.

[0011] As described above, a buckle that can be automatically buckled to increase the expansion space is provided, and the locking buckle extends to one end above the linkage end and is provided with a buckling end, and the linkage end is provided with an elastic member that can press the locking buckle to rotate the locking buckle toward the unlocking shelf side, and the supporting slider is provided with a locking frame that can buckle the buckling end to lock the locking buckle when the locking buckle locks the shelf.

[0012] As described above, in the buckle that can automatically buckle and increase the expansion space, the locking frame is integrally formed on the locking piece.

[0013] As described above, in the buckle that can automatically buckle and increase the expansion space, the locking frame can be rotatably inserted on the supporting slider.

[0014] As described above, a buckle that can automatically buckle and increase expansion space, the locking end and the positioning end are respectively on two opposite surfaces of the positioning block, and the linkage end and the locking end are respectively arranged at the upper and lower ends of the same side of the positioning block.

[0015] As described above, a buckle that can be automatically buckled to increase the expansion space is provided with a window on the side wall of the support groove close to the fixed plate, and one end of the locking buckle extends into the support groove from the window. The rotating power part is a fork provided on the locking buckle, which extends into the support groove and can be pressed when the shelf is placed to rotate the locking buckle to lock the shelf.

[0016] As described above, a buckle that can automatically buckle to increase the expansion space, the locking buckle extends to one end above the linkage end and is provided with a pressing end, and an unlocking spring is provided between the linkage end and the pressing end, which can press the pressing end to make the locking buckle rotate toward the unlocking shelf.

[0017] As described above, a buckle that can automatically buckle and increase expansion space is provided, the pressing end is provided with a space-avoiding window, the positioning block is provided with a reset end, and the reset end is provided with a reset spring that passes through the space-avoiding window and leans against the top wall of the positioning installation groove to enable the positioning block to rotate and reset to one side of the positioning part.

[0018] As described above, a buckle that can automatically buckle to increase expansion space, the side wall of the supporting slider is provided with a positioning protrusion that can block the locking member when the locking member locks the positioning block, and a positioning groove for the locking member to slide into when the locking member rotates away from the positioning block and unlocks.

[0019] As described above, a buckle that can be automatically buckled to increase the expansion space, the positioning part is a positioning protrusion, the two ends of the positioning protrusion are connected to the fixing plate, and the middle part is separated from the fixing plate to form a separation hole, the positioning end is pressed against the upper end of the positioning protrusion, and the upper end of the positioning end is provided with a positioning buckle platform that can be buckled in the separation hole located above the positioning end.

[0020] As described above, a buckle that can automatically buckle to increase the expansion space is provided with a window on the side wall of the support groove close to the fixing plate, and the locking buckle is provided with a locking buckle wall extending from the window into the support groove, and the locking buckle wall is provided with an arc hook covering the opening of the support groove.

[0021] As described above, a buckle that can automatically buckle to increase the expansion space is provided with a locking convex buckle at the edge of the window, and a positioning groove is provided on the locking buckle for the locking convex buckle to buckle into when the locking buckle unlocks the shelf.

[0022] As described above, a buckle that can automatically buckle to increase the expansion space is sleeved on the hinge shaft, with one end of the double-compression torsion spring pressing the locking buckle to rotate toward the unlocking shelf and the other end pressing the positioning block to rotate toward the positioning part.

[0023] The beneficial effects of the utility model are as follows: the locking buckle can be rotatably mounted on the positioning block, which can save installation space; the locking buckle directly presses the shelf, so that the portion of the locking buckle extending outwardly onto the shelf is smaller, thereby reducing the installation space, and does not occupy the slide space for placing beverages on the shelf, and can increase the expansion space; the locking buckle can be automatically buckled on the shelf by rotating the power member belt to achieve automatic locking, which is easy to use; the positioning block is linked to the locking buckle, and when the positioning block is rotated to unlock the positioning block, the locking buckle will be driven to shift and unlock the shelf, which is easy to use.

Brief Description of the Drawings

[0024] Figure 1 It is a three-dimensional diagram of the first embodiment of the utility model;

[0025] Figure 2 This is an exploded view of the first embodiment of the utility model;

[0026] Figure 3It is a cross-sectional view of the first embodiment of the utility model;

[0027] Figure 4 It is a three-dimensional diagram of components of the first embodiment of the utility model;

[0028] Figure 5 It is a three-dimensional diagram of the second embodiment of the utility model;

[0029] Figure 6 It is a three-dimensional diagram of the third embodiment of the present utility model;

[0030] Figure 7 This is an exploded view of the third embodiment of the present utility model;

[0031] Figure 8 It is a three-dimensional diagram of components of the third embodiment of the present utility model;

[0032] Fig. 9 It is a three-dimensional diagram of the fourth embodiment of the utility model;

[0033] Fig.10 It is a three-dimensional diagram of the fifth embodiment of the present utility model;

[0034] Fig.11 This is an exploded view of the fifth embodiment of the present utility model;

[0035] Fig.12 It is a three-dimensional diagram of the sixth embodiment of the utility model;

[0036] Fig.13 This is an exploded view of the sixth embodiment of the utility model;

[0037] Fig.14 This is a reference diagram of the use state of the sixth embodiment of the utility model;

[0038] Fig.15 for Fig.14 A magnified view of part I;

[0039] Fig.16 It is a three-dimensional diagram of the seventh embodiment of the present utility model. [Specific implementation method]

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0041] Embodiment 1, as Figures 1 to 4As shown, a buckle that can automatically buckle and increase expansion space includes a fixing plate 1 for installation on the inner wall of a refrigerator. The fixing plate 1 is arranged vertically. The fixing plate 1 is usually fixed on two opposite surfaces of the refrigerator, and two fixing plates are separated on each surface. A support slider 2 can be slidably provided on the fixing plate 1 along the length direction of the fixing plate. The left and right sides of the fixing plate 1 are provided with a guide slide groove extending vertically. The support slider 2 is provided with a guide slide rail buckled into the guide slide groove. A plurality of positioning parts 3 are provided on the fixing plate 1 along the length direction. In this embodiment, the positioning part 3 is a positioning boss. The positioning boss can be in the shape of an arc, an arch, etc. The positioning part 3 can also be in other forms as long as it is used for positioning, for example, it can also be a hole. A positioning block 4 that can be pressed against the positioning part 3 to position the support slider 2 is provided on the support slider 2. The positioning block 4 is pressed against one of the positioning parts 3 to support the support slider 2. The support slider 2 is provided with an upper end opening for one end of the shelf to be placed in a support groove 21 for supporting the shelf, and the bottom frame or support rod of the shelf is placed in the support groove 21. The positioning block 4 is rotatably provided with a locking buckle 5 which can be pressed against the shelf to lock the shelf. The locking buckle 5 presses the shelf part (the bottom frame of the shelf or the supporting rod, etc.) in the supporting groove 21. The positioning block 4 is provided with a rotating power part 6 which can allow the locking buckle 5 to rotate in the direction of locking the shelf. The supporting slider 2 is provided with a locking member 7 which can lock the positioning block 4 when the positioning block 4 is pressed against the positioning part 3. The locking member 7 locks the positioning block 4 so that the positioning block 4 does not separate from the positioning part 3. In this embodiment, the locking member 7 is a U-shaped rod, and the two ends of the U-shaped mouth of the locking member 7 can be relatively rotatably inserted into the two side walls of the supporting slider 2.

[0042] The positioning block 4 is provided with a linkage end 41 that can drive the locking buckle 5 to rotate. The linkage end 41 can be used to drive the locking buckle 5 to lock and / or unlock the shelf. In this embodiment, the positioning block 4 is provided with a linkage end 41 that can drive the locking buckle 5 to rotate. The linkage end 41 rests on one end of the locking buckle 5 and can rotate the locking buckle 5. When the positioning block 4 rotates away from the positioning part 3 to release the positioning, the linkage end 41 drives the locking buckle 5 to rotate and unlock the shelf. When the positioning block 4 rotates to unlock, the linkage end 41 presses the locking buckle 5 and drives the locking buckle 5 to rotate, thereby unlocking the shelf. It is easy to use.

[0043] For easy installation, the positioning block 4 is hinged to the support slider 2 via the hinge shaft 11, and the locking buckle 5 is rotatably arranged on the hinge shaft 11, which is the rotation center of the positioning block 4 and the locking buckle 5. The lower end of the locking buckle 5 is provided with a rotating shaft sleeve 51 for the hinge shaft 11 to be inserted, and the positioning block 4 is provided with a locking installation groove 42 for the rotating shaft sleeve 51 to be inserted. The hinge shaft 11 penetrates the locking installation groove 42 and is inserted into the rotating shaft sleeve 51. The rotating shaft sleeve 51 is first inserted into the locking installation groove 42, and the hinge shaft 11 is then inserted from the hinge shaft hole on the positioning block 4 into the locking installation groove 42 and penetrates into the rotating shaft sleeve 51. The rotating power member 6 is a torsion spring arranged on the positioning block 4, which can press the locking buckle 5 so that the locking buckle 5 presses the shelf. When the positioning block 4 is reset and locked, the elastic member 6 allows the locking buckle 5 to reset, press against one end of the linkage end 41, and automatically rotate toward one side of the locking shelf. The locking buckle 5 is provided with a pressing end 52 for pressing one end of the torsion spring, and the other end of the torsion spring is pressed on the supporting slider 2. Bosses 42 are respectively provided on both sides of the positioning block 4, and the middle part of the torsion spring is sleeved on the bosses 42.

[0044] The positioning block 4 can have a variety of structural forms. In this embodiment, the positioning block 4 is provided with a locking end 43 and a positioning end 44 that can be pressed against the positioning portion 3 for positioning. The locking end 43 and the positioning end 44 are in a forked form, and the locking member 7 is buckled on the locking end 43. A positioning installation groove 22 is provided at the lower end of the support slider 2, and the hinge shaft 11 is inserted into the positioning installation groove 22. One end of the torsion spring is pressed against the top wall of the positioning installation groove 22. The locking end 43 and the positioning end 44 are respectively on two opposite surfaces of the positioning block 4. The locking end 43 is provided at the lower end of the positioning block 4. A buckle groove 45 for the locking member 7 to buckle is provided on the locking end 43. A boss 46 that can block the locking member 7 is provided on one side of the buckle groove 45. The boss 46 has a certain locking effect to prevent the locking member 7 from slipping off. A dial handle is provided on the upper end of the positioning block 4 on the same side of the locking end 43 to facilitate manual dialing and rotation of the positioning block 4. The positioning portion 3 is a positioning protrusion, the two ends of the positioning protrusion are connected to the fixing plate 1, and the middle part is separated from the fixing plate 1 to form a separation hole 12. The positioning end 44 is pressed against the upper end of the positioning protrusion, and the positioning end 4 is located between two adjacent positioning protrusions. The upper end of the positioning end 44 is provided with a positioning buckle platform 47 that can be buckled in the separation hole 12 located above the positioning end 44. The positioning buckle platform 47 is buckled in from the bottom of the separation hole 12. Through the positioning of the positioning buckle platform 47, the support slider 2 will not arbitrarily detach from the positioning portion 3. Of course, the positioning buckle platform 47 will not be buckled, and the buckling amount of the positioning buckle platform 47 is small, about 0.1-1.5mm.

[0045] In order to position the locking piece 7, the side wall of the supporting slider 2 is provided with a positioning protrusion 23 which can block the locking piece 7 when the locking piece 7 locks the positioning block 4, and a positioning groove 24 for the locking piece 7 to slide into when the locking piece 7 is turned away from the positioning block 4 and unlocked. The positioning protrusion 23 has an inclined guide surface, allowing the locking piece 7 to slide smoothly and buckle on the side wall of the positioning protrusion 23. The positioning protrusion 23 can prevent the locking piece 7 from slipping off when it is in a locked state, and the positioning groove 24 can limit the activity space of the locking piece 7 when it is unlocked.

[0046] In order to reduce the installation space, a window 25 is provided on the side wall of the support groove 21 close to the fixing plate 1, and a locking buckle wall 53 is provided on the locking buckle 5 through the window 25 extending into the support groove 21. The locking buckle wall 53 is provided with an arc-shaped hook 54 covering the opening of the support groove 21. The arc-shaped hook 54 is bent downward, and when in the state of locking the shelf, the locking buckle wall 53 is inclined toward one side of the shelf.

[0047] Embodiment 2, as Figure 5 As shown, the difference from the first embodiment is that the shape of the positioning portion 3 is different. In this embodiment, the lower end of the positioning portion 3 is connected to the fixing plate 1, and the place where the lower end of the positioning portion 3 is connected to the fixing plate 1 is an arc transition. The upper end of the positioning portion 3 is convex, and the middle part of the upper end of the positioning portion 3 is separated from the fixing plate 1 to form a gap.

[0048] Embodiment three, as Figure 6-8 As shown, the structures of the rotating power member 6 and the locking buckle 5 are different. Specifically, in order to lock the locking buckle 5, the locking buckle 5 is provided with a buckling end 55 at one end extending above the linkage end 41. The linkage end 41 is provided with an elastic member 45 that can press the locking buckle 5 to rotate the locking buckle 5 toward the unlocking shelf. The supporting slider 2 is provided with a locking frame 8 that can buckle on the buckling end 55 to lock the locking buckle 5 when the locking buckle 5 locks the shelf. The locking frame 8 is integrally formed on the locking member 7 to keep the locking buckle 5 stable. The locking end 43 and the positioning end 44 are respectively on the two opposite surfaces of the positioning block 4, and the linkage end 41 and the locking end 43 are respectively provided at the upper and lower ends of the same side of the positioning block 4. A window 25 is provided on the side wall of the support groove 21 near the fixed sheet 1, and one end of the locking buckle 5 extends from the window 25 into the support groove 21. The rotating power member 6 is a fork provided on the locking buckle 5 that extends into the support groove 21 and can be pressed by the shelf when it is placed so that the locking buckle 5 rotates to lock the shelf. The fork tilts upward and tilts up. When the shelf is placed in the support groove 21, the fork is pressed down so that the locking buckle 5 rotates to the side of the locked shelf. In this way, the locking buckle 5 can be automatically locked after the shelf is placed, which is convenient to use. A top pressing end 56 is provided at one end of the locking buckle 5 extending above the linkage end 41. An unlocking spring 57 that can press the top pressing end 56 to rotate the locking buckle 5 to the side of the unlocked shelf is provided between the linkage end 41 and the top pressing end 56. When the shelf is picked up, the locking buckle 5 is automatically unlocked by pressing the unlocking spring 57 to rotate away from the shelf.

[0049] Embodiment 4, as Fig. 9 As shown, the difference from the third embodiment is that the locking frame 8 is different. Specifically, the locking frame 8 is rotatably inserted into the supporting slider 2.

[0050] Embodiment 5, as Fig.10 and 11As shown, the difference from Example 3 is that the positioning block 4 is reset separately, a void window 58 is provided on the top pressure end 56, a reset end 48 is provided on the positioning block 4, the reset end 48 and the linkage end 41 are located on the same end of the positioning block 4, the reset end 48 is on the inner side, and the linkage end 41 is on the edge. A reset spring 49 is provided on the reset end 48, which passes through the void window 58 and rests on the top wall of the positioning installation groove 22 to enable the positioning block 4 to rotate and reset toward the side of the positioning part 3. The reset spring 49 springs the positioning block 4. When the positioning block 4 is in the positioning state, the unlocking spring 57 can press the locking buckle 5 to rotate toward the unlocking shelf side.

[0051] Embodiment six, as Figure 12-15 As shown, the difference from Example 3 is that the unlocking spring 57 and the locking frame 8 are not required. Specifically, a double-compression torsion spring 13 is sleeved on the hinge shaft 11, and one end of the double-compression torsion spring 13 presses the locking buckle 5 to rotate toward the unlocking shelf and the other end presses the positioning block 4 to rotate toward the positioning part 3. The two ends of the double-compression torsion spring 13 are fully utilized to achieve double compression. After the shelf is picked up, the double-compression torsion spring 13 will press the locking buckle 5 to unlock it. The structure is simple and easy to use.

[0052] Embodiment seven, as Fig.16 As shown, the difference from the sixth embodiment is that in this embodiment, the positioning portion 3 is a positioning hole, and the positioning end 44 is inserted into and pressed against the positioning hole.

[0053] The above contents are further detailed descriptions of the present invention in combination with specific preferred technical solutions, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the utility model.

Claims

1. A buckle that can automatically buckle to increase expansion space, comprising a fixing plate (1) for installation on the inner wall of a refrigerator, a supporting slider (2) being slidably provided on the fixing plate (1) along the length direction of the fixing plate, a plurality of positioning portions (3) being provided on the fixing plate (1) along the length direction, a positioning block (4) being provided on the supporting slider (2) that can be pressed against the positioning portions (3) to position the supporting slider (2), an upper end opening being provided on the supporting slider (2) for one end of a shelf to be placed into a supporting groove (21) for supporting the shelf, characterized in that: The positioning block (4) is rotatably provided with a locking buckle (5) that can be pressed against the shelf to lock the shelf; the locking buckle (5) or the positioning block (4) or the supporting slider (2) is provided with a rotating power member (6) that can enable the locking buckle (5) to rotate in a direction to lock the shelf; the supporting slider (2) is provided with a locking member (7) that can lock the positioning block (4) when the positioning block (4) is pressed against the positioning portion (3).

2. According to claim 1, a buckle that can automatically buckle to increase the expansion space is characterized in that: The positioning block (4) is provided with a linkage end (41) capable of driving the locking buckle (5) to rotate; when the positioning block (4) rotates away from the positioning portion (3) to release the positioning, the linkage end (41) drives the locking buckle (5) to rotate and unlock the shelf.

3. A buckle capable of automatically buckling to increase expansion space according to claim 2, characterized in that: The positioning block (4) is hinged to the supporting sliding block (2) via a hinge shaft (11), and the locking buckle (5) is rotatably arranged on the hinge shaft (11).

4. A buckle capable of automatically buckling to increase expansion space according to claim 3, characterized in that: The lower end of the locking buckle (5) is provided with a rotating shaft sleeve (51) for the hinge shaft (11) to be inserted into, and the positioning block (4) is provided with a locking installation groove (42) for the rotating shaft sleeve (51) to be inserted into, and the hinge shaft (11) penetrates the locking installation groove (42) and is inserted into the rotating shaft sleeve (51).

5. According to claim 1, a buckle capable of automatically buckling to increase expansion space, characterized in that: The rotating power member (6) is a torsion spring arranged on the positioning block (4) and capable of pressing the locking buckle (5) so that the locking buckle (5) presses the shelf. The locking buckle (5) is provided with a pressing end (52) for pressing one end of the torsion spring. The other end of the torsion spring is pressed on the supporting slider (2). The positioning block (4) is provided with convex columns on both sides, and the middle part of the torsion spring is sleeved on the convex columns.

6. A buckle capable of automatically closing to increase expansion space according to claim 3, characterized in that: The positioning block (4) is provided with a locking end (43) and a positioning end (44) that can be pressed against the positioning portion (3) for positioning; the locking member (7) is buckled on the locking end (43); the lower end of the supporting sliding block (2) is provided with a positioning installation groove (22); the hinge shaft (11) is inserted into the positioning installation groove (22).

7. A buckle capable of automatically buckling to increase expansion space according to claim 6, characterized in that: The locking buckle (5) is provided with a buckling end (55) at one end extending above the linkage end (41); the linkage end (41) is provided with an elastic member (45) capable of pressing the locking buckle (5) to rotate the locking buckle (5) toward the unlocking shelf side; and the supporting slider (2) is provided with a locking frame (8) capable of buckling on the buckling end (55) to lock the locking buckle (5) when the locking buckle (5) locks the shelf.

8. A buckle capable of automatically buckling to increase expansion space according to claim 7, characterized in that: The locking frame (8) is integrally formed on the locking member (7).

9. A buckle capable of automatically buckling to increase expansion space according to claim 7, characterized in that: The locking frame (8) is rotatably plugged into the supporting slide block (2).

10. A buckle capable of automatically buckling to increase expansion space according to claim 7, characterized in that: The locking end (43) and the positioning end (44) are respectively located on two opposite surfaces of the positioning block (4), and the linkage end (41) and the locking end (43) are respectively located at the upper and lower ends of the same side of the positioning block (4).

11. A buckle capable of automatically buckling to increase expansion space according to claim 6, characterized in that: A window (25) is provided on the side wall of the support groove (21) close to the fixing plate (1); one end of the locking buckle (5) extends from the window (25) into the support groove (21); and the rotating power member (6) is a shift fork provided on the locking buckle (5) and extending into the support groove (21) and capable of being pressed when a shelf is placed so that the locking buckle (5) rotates and locks the shelf.

12. A buckle capable of automatically buckling to increase expansion space according to claim 11, characterized in that: The locking buckle (5) is provided with a pressing end (56) at one end extending above the linkage end (41), and an unlocking spring (57) is provided between the linkage end (41) and the pressing end (56) and is capable of pressing the pressing end (56) to rotate the locking buckle (5) toward the unlocking shelf.

13. A buckle capable of automatically buckling to increase expansion space according to claim 12, characterized in that: The pressing end (56) is provided with a clearance window (58), the positioning block (4) is provided with a reset end (48), and the reset end (48) is provided with a reset spring (49) which passes through the clearance window (58) and rests against the top wall of the positioning installation groove (22) to enable the positioning block (4) to rotate and reset toward one side of the positioning portion (3).

14. A buckle capable of automatically buckling to increase expansion space according to claim 1, characterized in that: The side wall of the supporting slide block (2) is provided with a positioning protrusion (23) capable of blocking the locking member (7) when the locking member (7) locks the positioning block (4), and a positioning groove (24) for the locking member (7) to slide into when the locking member (7) rotates away from the positioning block (4) to unlock.

15. A buckle capable of automatically buckling to increase expansion space according to claim 6, characterized in that: The positioning portion (3) is a positioning protrusion, the two ends of the positioning protrusion are connected to the fixing plate (1), and the middle part is separated from the fixing plate (1) to form a separation hole (12), the positioning end (44) is pressed against the upper end of the positioning protrusion, and the upper end of the positioning end (44) is provided with a positioning buckle platform (47) that can be buckled in the separation hole (12) located above the positioning end (44).

16. A buckle capable of automatically buckling to increase expansion space according to claim 1, characterized in that: A window (25) is provided on the side wall of the support groove (21) close to the fixing plate (1), and a locking buckle wall (53) is provided on the locking buckle (5) extending from the window (25) into the support groove (21), and an arc-shaped hook (54) is provided on the locking buckle wall (53) covering the opening of the support groove (21).

17. A buckle capable of automatically buckling to increase expansion space according to claim 11 or 16, characterized in that: The edge of the window (25) is provided with a locking convex buckle (26), and the locking buckle (5) is provided with a positioning groove (24) for the locking convex buckle (26) to buckle into when the locking buckle (5) unlocks the shelf.

18. The buckle capable of automatically closing to increase expansion space according to claim 11, characterized in that: The hinge shaft (11) is sleeved with a double-compression torsion spring (13), one end of which presses the locking buckle (5) to rotate toward the unlocking shelf side, and the other end of which presses the positioning block (4) to rotate toward the positioning portion (3) side.

Images