Frame assembly connecting structure

Abstract

The utility model relates to the technical field of intelligent household part connection, and discloses a frame assembly connecting structure which comprises a frame and a stand column used for supporting the frame, a box body is arranged at the end of the stand column, a mounting buckle and a mounting groove which are matched with each other are arranged between the box body and the frame, and a locking assembly is arranged on the front wall of the box body. The locking assembly limits the installation buckles in the installation grooves to achieve connection and fixation of the frame and the stand columns, the locking assembly comprises a locking piece and a wrench, the locking piece is rotationally connected with the wrench, the locking piece is preassembled on the front wall of the box body and can slide along the front wall of the box body, the wrench is provided with a cam and a supporting part, and the supporting part achieves automatic opening of the wrench in the assembling process. The cam further enhances the locking effect between the stand column and the frame. The utility model further provides a mounting method and a dismounting method of the frame assembly, the frame assembly can be quickly mounted without additional tools, and the frame assembly is good in rigidity and high in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of smart home component connection, in particular to a frame component connection structure. Background Art

[0002] Electric height-adjustable desks are increasingly becoming part of everyday life, their height-adjustable functionality meeting the needs of desk-bound workers for alternate sit-stand work. However, existing electric height-adjustable desks typically require eight or more screws to secure the frame and columns, requiring tools for assembly and disassembly, which is time-consuming, labor-intensive, and inefficient.

[0003] A Chinese patent (publication number: CN107981540B) discloses a quick-assembly desktop stand that uses a snap-on structure and a wrench to quickly connect and fix the frame and column. However, in this solution, the wrench is visible after assembly, affecting the aesthetics of the product. In addition, the wrench is a separate component that requires the user to assemble it themselves. The wrench must also be assembled according to the installation instructions, which affects the convenience of installation. In addition, if the user forgets to assemble the installation wrench, the column and frame will separate and fall over, posing a certain safety hazard. During normal installation and use, if the user accidentally operates the installation wrench and loosens it, there is also a safety hazard of the column and frame separating and falling over.

[0004] A Chinese patent (publication number: CN116480671B) discloses a lifting column connection structure and disassembly method, which locks the frame and column through a snap-fit structure and a locking wedge plate, and assists in quick disassembly with the help of a wrench pre-installed on the locking wedge plate, and the disassembly process can be completed without the help of other additional tools. However, the fastening of the locking wedge plate depends on the force of the elastic member. If the force of the elastic member is insufficient, the connection between the column and the frame will be unstable, affecting the rigidity of the entire table; if the elastic member fails, it is easy to cause the column to separate from the frame, causing property damage or personal injury. The wrench on the locking wedge plate connects multiple structural parts through two rotating shafts (refer to the patent description), and the operation needs to be completed through multiple steps after reading the installation instructions, which affects the convenience of installation. During disassembly, the direction of the wrench's force is opposite to the direction of separation of the column, which increases the difficulty of disassembling the column and frame, affecting the convenience of disassembly. Utility Model Content

[0005] The purpose of the utility model is to provide a frame assembly connection structure, an installation method and a disassembly method in response to the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A frame assembly connection structure includes a frame and a column for supporting the frame, a mounting groove is provided on the inner side of the frame, a box body is provided at the end of the column, a mounting buckle is provided on the side of the box body, and a locking assembly is provided on the front wall of the box body, the locking assembly limits the mounting buckle in the mounting groove to achieve the connection and fixation between the frame and the column, the locking assembly includes a locking piece and a wrench, the locking piece is slidingly connected to the front wall of the box body, the wrench is rotatably connected to the locking piece, a cam and a support part are provided on the wrench, the cam passes through the locking piece and is placed between the front wall of the box body and the locking piece, the support part is inserted into the front wall of the box body, and the wrench and / or the support part can drive the cam to rotate.

[0008] Furthermore, a first through hole is formed on the locking member, a notch is formed on the front wall of the box body, and the support portion is at least partially located in the notch after passing through the first through hole.

[0009] Furthermore, in the locked state, the support portion may rest against the edge of the slot or be close to the edge of the slot.

[0010] Furthermore, the wrench is provided with a first hinge hole, the locking piece is provided with a second through hole and a second hinge hole, the cam passes through the second through hole, and the rotating shaft passes through the first hinge hole and the second hinge hole to realize the rotational connection between the wrench and the locking piece.

[0011] Furthermore, one end of the rotating shaft passes through the second hinge hole and the first hinge hole, and the other end of the rotating shaft is bent to form a limit.

[0012] Furthermore, the first hinge hole is provided on the cam.

[0013] Furthermore, the locking member is pre-installed on the front wall of the box body through the elastic member, and the elastic member applies a force on the locking member toward the opening of the box body.

[0014] Furthermore, the locking member is pre-installed on the front wall of the box body by means of a shoulder screw.

[0015] Furthermore, a connecting block is provided on the groove edge of the first through hole of the locking member near the opening of the box body, and the connecting block passes through the groove. The elastic member is located inside the box body, with one end mounted on the box body and the other end mounted on the connecting block.

[0016] Furthermore, a limiting member is connected to the connecting block, and the limiting member can prevent the elastic member or the locking member from falling off from the front wall of the box body.

[0017] Furthermore, when the outer contours of the wrench and the locking member abut against each other, the wrench stops flipping; or a limiting fold is provided on one side of the locking member close to the bottom wall of the box body, and the wrench stops flipping when it flips to the limiting fold.

[0018] Furthermore, when the wrench is lifted, the distance between the cam's rotation center and the front wall is L3. When the wrench is flipped downward, the radius of contact between the cam and the front wall gradually increases. At the highest point of the cam, the distance between the cam's rotation center and the front wall is L1. When the wrench continues to flip to the locked state, the distance between the cam's rotation center and the front wall is L2, L1>L2>L3.

[0019] The utility model also provides a quick installation method for installing the column in the frame, the steps comprising:

[0020] S1. Place the frame on a horizontal surface below, align the mounting buckles on the column box body with the mounting slots on the frame, and install it downwards. The wrench will automatically pop open.

[0021] S2. Push or pull the column toward the inside of the installation slot or toward the rear wall of the box body, so that the locking member is embedded in the installation slot;

[0022] S3. Press the wrench so that the locking piece is completely installed in the installation slot. At the same time, the cam applies a horizontal force between the front wall of the box body and the locking piece, so that the column and the frame are completely locked.

[0023] The utility model also provides a disassembly method for disassembling the column from the frame, the steps comprising:

[0024] A1. Flip the wrench upward until it stops flipping;

[0025] A2. Pull the wrench upward to release the locking piece from the installation slot;

[0026] A3. Continue to pull the wrench upwards. Under the action of tension, the mounting buckle of the box body moves to the opening of the mounting slot, and the column is removed from the frame.

[0027] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0028] 1. The wrench of the present invention is provided with a cam and a support portion. When the wrench is flipped downward, the support portion rests against the front wall of the box body, so that the locking piece is completely inserted into the installation groove. At the same time, the cam exerts a horizontal force between the front wall of the box body and the locking piece, thereby strengthening the locking effect between the column and the frame, thereby improving the rigidity and safety of the frame assembly.

[0029] 2. The wrench and the locking piece are hinged with the rotating shaft as the fulcrum. The first hinge hole is located on the cam, forming a force-saving lever between the cam and the wrench. When pressing and pulling the wrench, only a small force is required to complete the operation, which provides a better user experience.

[0030] 3. The wrench is provided with a support part. The support part and the limit groove on the box body are used to realize the automatic opening of the quick-release wrench during installation, guiding the user to lock it; the locking action is simplified to one step, without the need to refer to the installation manual, and the installation efficiency is high.

[0031] 4. If the elastic force of the elastic member is insufficient and the locking wing of the locking member is not fully installed in the installation slot, the support portion and the limit slot on the box body are pressed tightly together. Flip the wrench downward, and the support portion will exert force on the locking member toward the box body opening. Pressing the wrench can make the locking wing fully install in the installation slot, achieving effective locking.

[0032] 5. The locking parts are pre-installed on the box body, and there is no risk of missing them. The locking parts and elastic parts make a click sound when the table legs are installed. At this time, the column and the frame have been connected and fixed; even if the operator forgets to press the wrench to complete further tightening, the locking parts can also lock the frame assembly under the action of the elastic parts to avoid safety hazards.

[0033] 6. When disassembling the column, the direction of force applied by the lifting wrench is consistent with the withdrawal direction of the column, making disassembly more convenient, labor-saving and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the basic structure of the frame assembly connection structure in Example 1 of the present utility model;

[0035] Figure 2 This is an exploded view of the connection structure of the frame assembly in Example 1 of the present utility model;

[0036] Figure 3 This is a schematic diagram of the basic structure of the locking member in the first embodiment of the present utility model;

[0037] Figure 4 This is a schematic diagram of the basic structure of the wrench in the first embodiment of the present utility model;

[0038] Figure 5 This is a schematic diagram of the position of the support portion in the locked state in the first embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the limiting member in the first embodiment of the present utility model;

[0040] Figure 7 This is a schematic diagram of the structure in the unlocked state in the first embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the structure of the first embodiment of the present invention in the locked state;

[0042] Figure 9 This is a schematic diagram of step S1 when installing the frame assembly connection structure in the second embodiment of the present utility model;

[0043] Figure 10 This is a schematic diagram of step S2 when installing the frame assembly connection structure in the second embodiment of the present utility model;

[0044] Figure 11 This is a schematic diagram of step S3 when installing the frame assembly connection structure in the second embodiment of the present utility model;

[0045] Figure 12 This is a diagram showing the frame assembly connection structure in the second embodiment of the present invention after installation;

[0046] Figure 13 This is a schematic diagram of step A2 when disassembling the frame assembly connection structure in the third embodiment of the present invention;

[0047] Figure 14 This is a schematic diagram of step A3 when disassembling the frame assembly connection structure in the second embodiment of the present invention;

[0048] Reference numerals in the figures include:

[0049] Column 10; box body 11; front wall 11a; notch 11b; groove edge 11c; mounting buckle 11e; elastic member 12; locking member 13; first through hole 13a; second through hole 13b; locking wing 13c; second hinge hole 13d; connecting block 13e; limiting fold 13f; limiting member 14; wrench 21; cam 21a; first hinge hole 21b; support portion 21c; rotating shaft 22; frame 3; mounting groove 3a; upper support surface 3b. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0052] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0053] Example 1

[0054] This embodiment provides a frame assembly connection structure for connecting and fixing the electric lift table frame 3 and the column 10 used to support the frame 3. A mounting groove 3a is provided on the inner side of the frame 3. The mounting groove 3a can be a two-stage groove or a multi-stage groove, including at least a guide section and a locking section. A box body 11 is provided at the end of the column 10. The box body 11 generally has an opening. For ease of description, the bottom opposite the opening of the box body 11 is defined as the bottom wall, the two parallel side surfaces adjacent to the frame 3 are defined as side walls, and the other two side surfaces are defined as the front wall 11a and the rear wall, respectively. The side walls of the box body 11 are provided with mounting buckles 11e that cooperate with the mounting groove 3a. The front wall 11a of the box body 11 is pre-installed with a locking assembly. The locking assembly can limit the mounting buckle 11e within the locking section of the mounting groove 3a to achieve the connection and fixation between the frame 3 and the column 10. It should be noted that the positions of the mounting buckle 11e and the mounting groove 3a can also be interchanged. As long as they can be mutually engaged, the technical purpose equivalent to that of the present application can be achieved.

[0055] The locking assembly includes a locking piece 13 and a wrench 21. The locking piece 13 is pre-installed on the front wall 11a of the box body 11. For example, the locking piece 13 can be pre-installed on the front wall 11a of the box body 11 by an elastic piece 12. The elastic piece 12 applies a force on the locking piece 13 toward the opening direction of the box body 11. The elastic piece 12 can be a tension spring, one end of which is connected to the front wall of the box body 11 and the other end is connected to the locking piece 13. Locking wings 13c are provided on both sides of the locking piece 13, which extend beyond the outer edge of the box body 11. The connection method of the locking piece 13 and the box body 11 and the setting position and method of the locking wings 13c can be referred to Chinese patents CN115681274B and CN116480671B; of course, the locking piece 13 can also be installed on the front wall 11a of the box body 11 by other means such as shoulder screws, as long as the pre-installation of the sliding connection between the locking piece 13 and the box body 11 can be achieved.

[0056] The wrench 21 is rotatably connected to the locking member 13. Pulling or pushing the wrench 21 causes the locking member 13 to slide within a certain distance along the front wall 11a of the box body 11. Conversely, the locking member 13 can also cause the wrench 21 to move. The wrench 21 is provided with a cam 21a and a support portion 21c. The cam 21a is provided with a first hinge hole 21b. The front wall 11a of the box body 11 is provided with a notch 11b. The locking member 13 is provided with a first through hole 13a, a second through hole 13b, and a second hinge hole 13d. After the cam 21a passes through the second through hole 13b, one end of the rotating shaft 22 passes through the second hinge hole 13d and connects to the first hinge hole 21b to achieve the rotational connection between the wrench 21 and the locking member 13. The other end of the rotating shaft 22 is bent to form a limit stop (not shown in the figure). Under this structure, when the wrench 21 is operated, a force-saving lever structure is formed between the cam 21a, the rotating shaft 22, and the wrench 21. It should be noted that, based on the technical inspiration of this solution, those skilled in the art should know that the number and position of the first hinge hole 21b and the second hinge hole 13d can be adjusted in a variety of positions as needed. For example, the first hinge hole 21b is provided on the wrench 21, at the connection between the wrench 21 and the cam 21a, as long as the wrench 21 and the locking member 13 can be hingedly connected and the cam 21a and the wrench 21 are located on both sides of the locking member 13; after the support portion 21c passes through the first through hole 13a, at least part of it is located in the notch 11b. If the wrench 21 and the locking member 13 are hinged at the edge of the locking member 13, the support portion 21c can also cross the locking member 13 and be directly inserted into the notch 11b, thereby producing a technical effect equivalent to that of this patent. When the wrench 21 is locked, the support portion 21c can abut against the groove edge 11c of the notch 11b close to the bottom wall of the box body 11, or the support portion 21c can be close to the groove edge 11c.

[0057] When the wrench 21 is lifted, the distance between the rotation center of the cam 21a and the front wall 11a is L3. When the wrench 21 is flipped downward, the radius of contact between the cam 21a and the front wall 11a gradually increases. When the cam 21a is at the highest point, the distance between the rotation center of the cam 21a and the front wall 11a is L1. When the wrench 21 continues to be flipped to the locked state, the distance between the rotation center of the cam 21a and the front wall 11a is L2, L1>L2>L3.

[0058] When the column 10 is initially installed on the frame 3, the wrench 21 is usually locked and attached to the front wall 11a of the box body 11, with the support portion 21c resting on or close to the groove edge 11c. Of course, the fact that the wrench 21 is lifted does not affect the final installation result. Place the frame 3 on a horizontal surface below, place the mounting buckle 11e of the box body 11 above the guide section of the mounting groove 3a of the frame 3, and then install the box body 11 of the column 10 downward. During this installation process, the locking wing 13c of the locking member 13 will rest on the upper support surface 3b of the frame 3. As the box body 11 moves downward, the support portion 21c rests on the groove edge 11c. The support portion 21c is rotated by the force of the groove edge 11c toward the opening of the box body 11, causing the wrench 21 to automatically pop open. By further pushing or pulling the column 10 toward the inner side of the mounting groove 3a or the rear wall of the box body 11, the locking wing 13c will slide on the upper support surface 3b of the frame 3 along the thrust or pull direction until the locking wing 13c slides to the opening of the mounting groove 3a. If the locking member 13 is pre-installed on the front wall 11a of the box body 11 through the elastic member 12, it moves downward under the action of the elastic member 12, and the locking wing 13c is inserted into the introduction section of the mounting groove 3a, achieving the same locking purpose as in CN115681274B and CN116480671B; if the locking member 13 is installed on the front wall 11a of the box body 11 by other means such as shoulder screws, it is necessary to manually press the locking wing 13c to insert it into the introduction section of the mounting groove 3a. At this time, the wrench 21 is still in the open state. Pressing the wrench 21 downward, the radius of contact between the cam 21a and the front wall 11a gradually increases until the cam 21a reaches its highest point. The wrench 21 continues to rotate until the cam 21a passes its highest point and the support portion 21c abuts against the groove edge 11c. Or when the wrench 21 rotates to fit the front wall 11a of the box body 11, the wrench 21 rotates into place. It is not ruled out that the locking member 13 has a large area and completely covers the front wall 11a of the box body 11. The wrench 21 rotates to fit the locking member 13 and then presses into place, which is also within the scope of protection of the present utility model. At this time, the cam 21a generates a horizontal tensioning force between the front wall 11a of the box body 11 and the locking member 13, pushing the box body 11 further toward the locking section of the installation groove 3a, while causing the locking member 13 to further squeeze the frame edge of the guide section of the installation groove 3a, thereby improving the rigidity and safety of the frame assembly. When the column 10 is locked with the frame 3, the structural combination of the support portion 21c and the cam 21a ensures that the force exerted by the support portion 21c to dislodge the locking member 13 is far insufficient to cause the cam 21a to rotate past its highest point, so that the locking member 13 will not fall out of the mounting groove 3a on its own, and there will be no safety hazard of self-unlocking.

[0059] In some cases, such as failure of the elastic member 12 or product tolerance, the locking wing 13c may not completely fall into the installation groove 3a (the complete description is the installation effect, which means that the locking wing 13c has a better effect of falling into the installation groove 3a, and the same applies below). Press the wrench 21 downward, and the support part 21c will rest on the groove edge 11c to form a fulcrum. Continue to press the wrench 21, and use the support part 21c as the fulcrum to move the shaft 22 downward, so that the locking member 13 can move downward until it completely falls into the installation groove 3a.

[0060] Example 2

[0061] This embodiment provides a method for installing the frame connection structure described in Example 1, such as Figures 8-12 , still with the locked state of the wrench 21 as the initial state, the locking assembly is pre-installed on the front wall 11a of the box body 11, the locking assembly includes a locking member 13 and a wrench 21, the locking member 13 is connected to the front wall 11a of the box body 11 through the elastic member 12, and the wrench 21 is attached to the front wall 11a of the box body 11.

[0062] When installing, the steps are as follows:

[0063] S1. Place the frame 3 on a horizontal surface below. Align the mounting buckle 11e on the box body 11 of the upright 10 with the mounting slot 3a of the frame 3 and insert it downward. The wrench 21 will automatically pop open. Because the locking wing 13c of the locking member 13 rests on the upper support surface 3b of the frame 3, as the box body 11 moves downward, the locking assembly slides upward relative to the front wall 11a. The support portion 21c of the wrench 21 is restrained by the groove edge 11c, forcing the support portion 21c to rotate about the rotation axis 22, causing the wrench 21 to automatically pop open.

[0064] S2. Push or pull the column 10 toward the inner side of the installation groove 3a or the rear wall of the box body 11. The locking wing 13c will slide along the pushing or pulling direction on the upper supporting surface 3b of the frame 3 until the locking wing 13c slides into the installation groove 3a. Under the action of manual or elastic member 12, the locking member 13 slides along the front wall 11a of the box body 11 toward the opening of the box body 11, and the locking wing 13c of the locking member 13 is embedded in the installation groove 3a.

[0065] S3. Press the wrench 21 to rotate it around the shaft 22. The cam 21a rotates with the wrench 21 past the highest point of the cam 21a, completing the locking and reinforcement process. Due to the force-saving lever structure formed between the cam 21a, the shaft 22, and the wrench 21, only a small amount of force is required to operate the wrench 21. The support portion 21c and the groove edge 11c of the limit groove 11b on the box body 11 are pressed tightly. The wrench 21 is flipped downward. The support portion 21c exerts a force on the locking member 13 in the direction of the box body opening. Pressing the wrench 21 can make the locking wing 13c completely fit into the installation groove 3a. At the same time, the cam 21a exerts a horizontal force between the front wall 11a of the box body 11 and the locking member 13, completely locking the column 10 and the frame 3.

[0066] Example 3

[0067] Figures 13-14 A disassembly method is provided. Taking the frame 3 placed on the lower plane as an example, the disassembly steps are as follows:

[0068] A1. Flip the wrench 21 upward, and the cam 21a rotates with the wrench 21 around the rotating shaft 22. When the outer contours of the wrench 21 and the locking member 13 are against each other, or when the wrench 21 is flipped to the limit fold 13f, the wrench 21 stops flipping.

[0069] A2. Pull up the wrench 21. The locking member 13 moves upward along the front wall 11a of the box body 11 along with the wrench 21, so that the locking wing 13c of the locking member 13 is separated from the installation groove 3a.

[0070] A3. Continue to pull the wrench 21. Under the action of the pulling force, the mounting buckle 11e of the box body 11 moves from the locking section of the mounting groove 3a to the opening of the mounting groove 3a, and the column 10 is removed from the frame 3.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame assembly connection structure, comprising a frame (3) and a column (10) for supporting the frame (3), wherein a mounting groove (3a) is provided on the inner side of the frame (3), a box body (11) is provided at the end of the column (10), a mounting buckle (11e) is provided on the side of the box body (11), and a locking assembly is provided on the front wall (11a) of the box body (11), wherein the locking assembly limits the mounting buckle (11e) in the mounting groove (3a) to realize the connection and fixation between the frame (3) and the column (10), characterized in that: The locking assembly comprises a locking member (13) and a wrench (21); the locking member (13) is slidably connected to the front wall (11a) of the box body (11); the wrench (21) is rotatably connected to the locking member (13); a cam (21a) and a supporting portion (21c) are provided on the wrench (21); the cam (21a) passes through the locking member (13) and is placed between the front wall (11a) of the box body (11) and the locking member (13); the supporting portion (21c) is inserted into the front wall (11a) of the box body (11); the wrench (21) and / or the supporting portion (21c) can drive the cam (21a) to rotate.

2. The frame assembly connection structure according to claim 1, characterized in that: A first through hole (13a) is provided on the locking member (13), a notch (11b) is provided on the front wall (11a) of the box body (11), and the support portion (21c) is at least partially located in the notch (11b) after passing through the first through hole (13a).

3. The frame assembly connection structure according to claim 2, characterized in that: In the locked state, the support portion (21c) can abut against the groove edge (11c) of the notch (11b) or be close to the groove edge (11c).

4. The frame assembly connection structure according to claim 1, wherein: The wrench (21) is provided with a first hinge hole (21b), the locking member (13) is provided with a second through hole (13b) and a second hinge hole (13d), the cam (21a) passes through the second through hole (13b), and the rotating shaft (22) passes through the first hinge hole (21b) and the second hinge hole (13d) to realize the rotational connection between the wrench (21) and the locking member (13).

5. The frame assembly connection structure according to claim 4, characterized in that: One end of the rotating shaft (22) passes through the second hinge hole (13d) and the first hinge hole (21b), and the other end of the rotating shaft (22) is bent to form a limit.

6. The frame assembly connection structure according to claim 4, characterized in that: The first hinge hole (21b) is provided on the cam (21a).

7. The frame assembly connection structure according to claim 2, characterized in that: The locking member (13) is pre-installed on the front wall (11a) of the box body (11) through the elastic member (12), and the elastic member (12) applies a force to the locking member (13) in the direction of the opening of the box body (11).

8. The frame assembly connection structure according to claim 1, characterized in that: The locking member (13) is pre-installed on the front wall (11a) of the box body (11) through a shoulder screw.

9. The frame assembly connection structure according to claim 7, characterized in that: A connecting block (13e) is provided on the groove edge of the first through hole (13a) of the locking member (13) close to the opening of the box body (11), and the connecting block (13e) passes through the notch (11b). The elastic member (12) is located inside the box body (11), with one end mounted on the box body (11) and the other end mounted on the connecting block (13e).

10. The frame assembly connection structure according to claim 9, characterized in that: The connection block (13e) is connected to a limiting member (14), and the limiting member (14) can prevent the elastic member (12) or the locking member (13) from falling off the front wall (11a) of the box body (11).

11. The frame assembly connection structure according to claim 1, wherein: When the outer contours of the wrench (21) and the locking member (13) abut against each other, the wrench (21) stops turning; or a limiting fold (13f) is provided on a side of the locking member (13) close to the bottom wall of the box body (11), and the wrench (21) stops turning when it turns to the limiting fold (13f).

12. The frame assembly connection structure according to claim 1, wherein: When the wrench (21) is lifted, the distance between the rotation center of the cam (21a) and the front wall (11a) is L3. When the wrench (21) is turned downward, the contact radius between the cam (21a) and the front wall (11a) gradually increases. When the cam (21a) is at its highest point, the distance between the rotation center of the cam (21a) and the front wall (11a) is L1. When the wrench (21) is further turned to a locked state, the distance between the rotation center of the cam (21a) and the front wall (11a) is L2, and L1>L2>L3.

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