A connecting lock and a frame connecting structure thereof

Abstract

The utility model belongs to the field of exhibition display, concretely relates to a connecting lock and frame connecting structure thereof, wherein the connecting lock comprises eccentric handle, rotating mechanism, guide rod, locking head, pull rod and guide shell, the guide shell is equipped with guide groove, the eccentric handle is rotatable connected with the pull rod through the rotating mechanism, the pull rod front end is inserted and passes through the guide shell and is connected with the locking head, the guide rod is inserted into the pull rod horizontally, and both ends thereof are connected with the guide grooves on both sides respectively. When the lock is used for frame connection, the lock is inserted into the frame mounting hole, and the pull rod front end locking head passes through and goes out the mounting hole of both frame, the eccentric handle is rotated, the pull rod is pulled back and the locking head is rotated simultaneously, the locking head is buckled on the hole wall around the frame mounting hole to realize the locking connection of two frames. The utility model has the advantages of simple structure, convenient operation, locking and dismounting without additional operating tools, and greatly improved work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of exhibition and display, and specifically relates to a frame connection structure and the connection lock used therein. Background Technology

[0002] When exhibiting, display stands are usually used to display various works. The basic frame used for the construction of display stands is often rectangular or square. During construction, multiple frames are assembled according to the size of the site and actual needs. During the assembly process, connectors are used to splice and install the profiles. When splicing, adjacent frames are usually connected by driving in bolts or screws, in conjunction with connectors.

[0003] The applicant discovered through a search that a Chinese patent discloses a "frame quick connection mechanism" with publication number "CN218176169U". This patent mainly connects the frame by combining a locking component with locking fasteners and corresponding through holes on the frame. Based on the aforementioned prior art, when fixing the connecting mechanism, two locking fasteners need to be installed in mirror image. The T-shaped pull rod inserted in one locking fastener locks into the lock hole of the other locking fastener. This solution requires a large number of components, resulting in high costs in production, manufacturing, installation, and maintenance, increasing user costs, and making installation and operation inconvenient. It cannot achieve quick connection and requires further optimization and upgrading. Summary of the Invention

[0004] The purpose of this utility model is to provide a connecting lock and its frame connection structure to solve the problems of inconvenient installation and high cost of locking devices mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A connecting lock includes an eccentric handle, a pull rod, and a guide shell. The guide shell has a guide groove. A rotating mechanism is provided, through which the eccentric handle is rotatably connected to the pull rod. A locking head is provided, with the front end of the pull rod inserted into and passing through the guide shell and connected to the locking head. A guide rod is provided, which is inserted laterally into the pull rod, and its two ends are respectively connected to the guide grooves on both sides. By rotating the eccentric handle, the pull rod is driven to achieve longitudinal displacement, and at the same time, through the cooperation of the guide rod and the guide groove, the pull rod and the locking head are rotated.

[0006] As a further improvement of this utility model, an upper cover plate is provided, which is fixedly connected to the guide shell, and the pull rod passes through the upper cover plate and is connected to the eccentric handle.

[0007] With the top cover plate installed, the guide shell can be fixed or its position limited.

[0008] As a further improvement of this utility model, positioning shells are provided around the sides of the guide shell. This further facilitates the installation and positioning of the guide shell, while protecting the coordinated movement of the guide rod and the guide groove.

[0009] As a further improvement of this utility model, the area covered by the upper cover plate is larger than the cross-sectional area of ​​the mounting shell.

[0010] With the above structure, once the guide shell is inserted into the mounting hole of the frame, the locking direction of the lock can be determined, without the need to further fix the guide shell with screws or other means.

[0011] As a further improvement of this utility model, an elastic element is provided, which is sleeved on the pull rod. The upper end of the elastic element acts on the upper cover plate, and the lower end is supported by the guide rod. When the eccentric handle is released, the pull rod is guaranteed to return to its original position.

[0012] As a preferred embodiment of this utility model: the rotating mechanism is a universal rotating ring.

[0013] In a preferred embodiment of this utility model, the locking head has a rectangular or elliptical structure. This structure is simple, practical, and exhibits a low deformation rate under stress.

[0014] A frame connection structure includes two frames and a connecting lock. The adjacent side frames of the two frames have corresponding mounting holes. The connecting lock is inserted into the mounting holes, and the locking head at the front end of the pull rod passes through and exits the mounting holes of the two side frames, defining the position of the guide shell. By rotating the eccentric handle, the pull rod is pulled backward while the locking head is rotated, so that the locking head locks onto the hole walls around the mounting holes of the side frames, thereby achieving a locking connection between the two frames.

[0015] The technical effects and advantages of this utility model are as follows: This invention controls the locking distance by eccentrically rotating the pull rod using an eccentric handle; the rotation angle of the locking head is achieved through the cooperation of the guide rod and guide groove, allowing the locking head to pass directly through the mounting hole on the frame during installation, and to engage with the surrounding wall of the mounting hole during locking. This invention is simple to operate, requiring no additional tools for locking and disassembly, greatly improving work efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the lock according to this utility model; Figure 2 This is an exploded view of the lock of this utility model; Figure 3 This is a schematic diagram of the pull rod connection part in the lock of this utility model; Figure 4 This is a schematic diagram of the guide shell in the lock of this utility model; Figure 5 for Figure 1 A sectional view; Figure 6 This is a diagram showing the connection structure between adjacent frames of this utility model; Figure 7 This is a diagram showing the connection and locking structure of adjacent frames in this utility model; Figure 8 This is a cross-sectional view of the adjacent frames of this utility model in the locked state. In the diagram: 1. Eccentric handle; 21. Lower cover plate; 22. Upper screw; 23. Lower screw; 24. Guide shell; 241. Guide groove; 25. Positioning shell; 3. Pull rod; 4. Locking head; 5. Upper cover plate; 6. Spring; 7. Rotating mechanism; 71. Universal rotating ring; 72. Upper pin; 73. Lower pin; 8. Guide rod; 9. Frame; 91. Mounting hole. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Example 1: As Figure 1 As shown: This embodiment relates to a connecting lock, which includes a guide shell 24, an eccentric handle 1, and a pull rod 3; the front end of the pull rod 3 is provided with a locking head 4. The locking head 4 and the pull rod 3 can be an integral structure or a connecting and fixing structure, such as a threaded connection or a welded structure. The structure of the locking head is mainly used to adapt to the shape of the mounting hole on the frame. For example, if the mounting hole is square, then the locking head is square.

[0019] like Figure 4 As shown: In this embodiment, the guide shell 24 is a hollow cylindrical structure. Two guide grooves 241 are symmetrically arranged on the side of the guide shell. The guide grooves 241 can be arc-shaped, or a combination of straight grooves and inclined grooves, straight grooves and arc-shaped grooves, etc. Their main purpose is to allow the pull rod to rotate at a certain angle. For example... Figure 2 and Figure 4 As shown: The guide shell has a positioning shell 25 on its side. The upper and lower ends of the guide shell are respectively provided with an upper cover plate 5 and a lower cover plate 21. The upper cover plate 5 and the lower cover plate 21 have through holes for the pull rod 3 to pass through. In this embodiment, the positioning shell 25 has a rectangular cross-section, which is the simplest and easiest to manufacture. Of course, the positioning shell can also be other non-cylindrical structures; the main purpose is to prevent the guide shell 24 from rotating after being inserted into the corresponding mounting holes on the frame. In this embodiment, a connecting wall is provided between the guide shell and the positioning shell, and the connecting wall has connecting holes for connecting with the upper and lower cover plates. Specifically, the upper cover plate 5 is connected to the guide shell by an upper screw 22, and the lower cover plate 21 is connected to the guide shell by a lower screw 23.

[0020] In this embodiment, when used as a connecting lock for the frame, in order to achieve tool-free installation, the upper cover plate 5 of this utility model covers an area exceeding the cross-sectional area of ​​the mounting shell. Thus, when the two frames are locked together, the upper cover plate and the locking head respectively fasten the hole walls around the mounting holes of the frame to achieve locking, that is, to achieve the purpose of clamping. In this way, there is no need to fix the guide shell.

[0021] Of course, this embodiment is a preferred embodiment. When simplifying this case, the positioning shell 25 can be omitted, and the shape of the guide shell can be designed arbitrarily. The upper cover plate and the lower cover plate can be ignored. It is only necessary to fix the guide shell 24 in the mounting hole 91 of the frame when locking.

[0022] like Figure 2 and Figure 3 As shown: In this embodiment, the rotating mechanism 7 adopts a universal rotating ring 71. The upper ring of the universal rotating ring 71 is eccentrically connected to the eccentric handle 1 through an upper pin 72, and the lower ring of the universal rotating ring is connected to the pull rod 3 through a lower pin 73. Of course, there are many structures that can be used for the rotating mechanism in this case, as long as the connection can realize the rotation of the pull rod.

[0023] like Figure 3 and Figure 5 As shown: To ensure that the lock components do not wobble and the eccentric handle structure remains stable under normal conditions, a spring 6 and a guide rod 8 are provided. The guide rod 8 is inserted laterally into the upper middle position of the pull rod 3, with both ends of the guide rod 8 extending beyond the pull rod 3. The spring 6 is sleeved on the pull rod 3, with its upper end acting on the upper cover plate 5 and its lower end supported by the guide rod 8. In this embodiment, the elastic element is a spring 6, but other structures such as disc springs can also be used.

[0024] like Figures 1 to 5 As shown: In this embodiment, during connection, the front end of the pull rod 3 is inserted into the guide housing and passes through the lower cover plate and the locking head, while the rear end of the pull rod passes through the upper cover plate 5 and is eccentrically connected to the eccentric handle 1. The two ends of the guide rod on the pull rod extend and are inserted into the guide groove 241 of the guide housing, respectively. When the eccentric handle 1 is rotated, it drives the pull rod 3 to move back and forth. Through the cooperation of the guide rod 8 and the guide groove 241, the pull rod rotates simultaneously while moving back and forth, thereby achieving the purpose of this invention.

[0025] Example 2: The connecting lock involved in Example 1 is used for the connection of the frame.

[0026] like Figures 6 to 8 As shown: The frame edge 9 is provided with mounting holes 91. The size and shape of the mounting holes 91 are adapted to the size and shape of the positioning shell 25. In this embodiment, their cross-sections are all rectangular structures. At the same time, the size and shape of the locking head are also adapted to the size and shape of the mounting holes, so as to ensure that the connecting lock can be smoothly inserted into the mounting hole when the eccentric handle is not turned, and the locking head can smoothly pass out of the mounting hole.

[0027] like Figures 6 to 8 As shown: When the two frames need to be connected and locked, align the mounting holes 91 on the two frames. Insert the connecting lock into the mounting hole on one side of the frame in its normal state. The pull rod 3 and locking head 4 at the front end of the connecting lock pass through and exit the mounting holes on both frames. At this time, as shown... Figure 6 As shown: the upper pin of the eccentric handle is closest to the upper cover plate. For example... Figure 7 As shown: When the eccentric handle is rotated, the distance between the upper pin of the eccentric handle and the upper cover plate gradually increases, thereby pulling the pull rod backward. At the same time, through the cooperation of the guide rod 8 and the guide groove 241, the pull rod 3 and the locking head 4 are rotated, so that the four corners of the locking head 4 abut against the hole walls around the mounting hole. Finally, when the eccentric handle 1 is rotated to the other end, the upper cover plate of the connecting lock and the locking head clamp the two frame frames 9, thereby realizing the connection of the two frames.

[0028] Compared with existing technologies, this application has a simple structure, which reduces the production cost of enterprises; moreover, this utility model is easy to install and disassemble, which greatly improves the efficiency of on-site installation and assembly, and has great promotional value.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connecting lock, comprising an eccentric handle, characterized in that: It also includes a pull rod and a guide shell; the guide shell is provided with a guide groove; a rotating mechanism is provided, and the eccentric handle is rotatably connected to the pull rod through the rotating mechanism; a locking head is provided, and the front end of the pull rod is inserted into and passes through the guide shell and connected to the locking head; a guide rod is provided, and the guide rod is inserted laterally into the pull rod, and its two ends are respectively connected to the guide grooves on both sides; by rotating the eccentric handle, the pull rod is driven to achieve longitudinal displacement, and at the same time, through the cooperation of the guide rod and the guide groove, the pull rod and the locking head are rotated.

2. The connecting lock according to claim 1, characterized in that: The device is provided with an upper cover plate, which is fixedly connected to the guide shell, and the pull rod passes through the upper cover plate and is connected to the eccentric handle.

3. The connecting lock according to claim 1 or 2, characterized in that: The guide shell is provided with positioning shells around its sides.

4. The connecting lock according to claim 2, characterized in that: The area covered by the upper cover plate is larger than the cross-sectional area of ​​the mounting shell.

5. The connecting lock according to claim 1, characterized in that: An elastic element is provided, which is sleeved on the pull rod. Its upper end acts on the upper cover plate, and its lower end is supported by the guide rod.

6. The connecting lock according to claim 1, characterized in that: The rotating mechanism is a universal rotating ring.

7. The connecting lock according to claim 1, characterized in that: The locking head has a rectangular or elliptical structure.

8. A frame connection structure comprising two frames, characterized in that, It also includes the connecting lock as described in any one of claims 1-7; the adjacent side frames of the two frames have corresponding mounting holes, the connecting lock is inserted into the mounting holes, and the locking head at the front end of the pull rod passes through and out of the mounting holes of the two side frames, defining the position of the guide shell. By rotating the eccentric handle, the pull rod is pulled back and the locking head is rotated at the same time, so that the locking head locks the hole wall around the mounting hole of the side frame, thereby realizing the locking connection of the two frames.

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