A type of connection lock

Abstract

This invention belongs to the field of exhibition and display technology, specifically relating to a connecting lock for connecting profiles. It includes a lock body and a connecting joint. The lock body includes a lock shell, a lock cylinder built into the lock shell, a locking sleeve, an axial drive assembly for driving the lock cylinder to move axially within a certain range of the lock shell, and a rotary drive assembly for driving the locking sleeve to rotate. The locking sleeve is movably connected to the front end of the lock cylinder, and the front end of the locking sleeve extends out of the lock shell, forming a lock groove with the lock shell. The connecting joint has at least two connecting end faces connected to the profiles, and the connecting end faces are provided with lock holes that match the front end of the locking sleeve. This invention enables rapid and flexible assembly of various profiles and angles, with reliable connections, simple operation, and a clean, aesthetically pleasing appearance after assembly, without unnecessary accessories.

Description

Technical Field

[0001] This invention belongs to the field of exhibition and display technology, and specifically relates to a connecting lock used for connecting profiles during frame construction. Background Technology

[0002] With societal development, businesses are increasingly favoring the flexible and rapid construction of various display frames for product display and promotion in conferences, exhibitions, and other settings. Constructing these frames requires connecting various profiles together, and connectors are typically locks. This has led to a growing demand for and increasingly stringent requirements for locking mechanisms used to connect these profiles.

[0003] Currently, the common connection structure used in structural assembly, especially in trade fairs or store assembly systems, relies on the connection between supporting profiles and locks. Locks generally include a lock case, a spring, and an eccentric wheel, as described in patent CN201310425765.5. This is achieved by setting a lock groove on the supporting profile, with the eccentric wheel controlling the spring to unfold and hook into the lock groove, thus achieving a locking connection. However, this connection has the following drawbacks: 1. The lock case is made of two riveted pieces, which can easily cause the lock head to come apart under increased manual torque, potentially damaging the lock and posing a safety hazard during assembly. 2. Due to limitations in size, self-locking angle, and bosses, self-locking can easily occur, affecting the quick assembly and disassembly of the lock. 3. The combination of spring and eccentric wheel has poor adjustable clearance capabilities. 4. The prerequisite for this connection is that the assembly profile must have a lock groove, resulting in poor flexibility. 5. This connection structure is generally used for assembling large frames; it has significant limitations for assembling small frames. Summary of the Invention

[0004] The purpose of this invention is to provide a connection lock to solve the problems mentioned in the background art, such as poor connection gap capability, poor flexibility, unreliable connection structure, and unattractive appearance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a connecting lock for multi-directional connection between profiles, comprising: a lock body, including a lock shell, a lock cylinder built into the lock shell, a locking sleeve, an axial drive assembly for driving the lock cylinder to move axially within a certain range of the lock shell, and a rotary drive assembly for driving the locking sleeve to rotate; the locking sleeve is movably connected to the front end of the lock cylinder, the front end of the locking sleeve extending out of the lock shell and forming a lock groove with the lock shell; the front end of the locking sleeve has a non-circular structure; a connecting joint: having at least two connecting end faces connected to the profiles, the connecting end faces having lock holes that match the front end of the locking sleeve; during connection, the lock body is connected to the lock cavity provided at the connecting end of the profile through the lock shell; the front end of the locking sleeve is inserted into the lock hole on the end face of the connecting joint, and the axial drive assembly causes the lock cylinder to move backward to reduce the width of the lock groove; simultaneously, the rotary drive assembly causes the locking sleeve to rotate, so that the front end of the locking sleeve engages with the surrounding walls of the lock hole of the connecting joint, thereby achieving a locking connection between the lock body and the connecting joint.

[0006] Preferably, the axial drive assembly includes a return spring, a wedge block, a locking bolt, and a locking nut; the wedge block has a bolt hole; the rear end of the lock cylinder has an oblique hole for accommodating and matching the up-and-down movement of the wedge block and an elongated hole for limiting the axial displacement of the lock cylinder, the oblique hole having a sliding inclined surface that matches the oblique surface of the wedge block; the locking bolt passes through the elongated hole and the bolt hole, and its two ends protrude from the corresponding lock housings; rotating the locking bolt controls the up-and-down movement of the wedge block, and the relative sliding of the oblique surface and the sliding inclined surface realizes the axial movement of the lock cylinder within the range specified by the elongated hole; the return spring is located between the rear end face of the lock cylinder and the bottom of the lock housing.

[0007] Preferably, the rotary drive assembly includes a guide post, and a guide arc-shaped groove is formed on the side wall of the locking sleeve. The guide post is fixed to the lock housing, and its front end is inserted into the guide arc-shaped groove. When the lock cylinder drives the locking sleeve to move axially, the rotation of the locking sleeve is simultaneously achieved through the guide post. The rotation angle of the locking sleeve can be controlled by setting the guide post and the guide arc-shaped groove.

[0008] Preferably, the profile lock cavity has through holes corresponding to the positions of the locking bolts. During connection, both ends of the locking bolts pass through the through holes to fix the lock body. This assembly facilitates control over the exterior of the lock profile and also secures the lock's position within the lock cavity.

[0009] Preferably, the return spring is in a compressed state to ensure that after the wedge block is released, the lock cylinder can return to its original position, thereby unlocking the lock.

[0010] In a preferred embodiment of the present invention, the front end of the locking sleeve is square, rectangular, or elliptical. The above structure is easy to manufacture, and its symmetrical shape ensures symmetry and balance during locking.

[0011] Preferably, the lock cylinder has a central screw hole, and the front end of the locking sleeve has a central hole with a countersunk screw. The locking sleeve is movably connected to the lock cylinder through the connection between the countersunk screw and the central screw hole. This invention adopts a central docking structure with a countersunk screw, which simplifies the structure, ensures the balance of the locking sleeve when locking, and ensures the balance of the lock operation after being subjected to locking force.

[0012] Preferably, sliding washers are provided on both sides of the central hole, and the locking sleeve is movably connected to the countersunk screw and the lock cylinder respectively through the sliding washers. The above structure ensures the flexibility of the locking sleeve rotation, while ensuring that the countersunk screw will not rotate as the locking sleeve rotates.

[0013] Preferably, the guide post is a stud, which is threadedly fixed to the lock housing. This maximizes the simplification of the structure while achieving the functions of connection and guidance.

[0014] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention achieves connection by rotating the locking sleeve so that its front end does not align with the lock hole, thereby pulling on the surrounding walls of the lock hole of the connecting joint. The axial and rotational movements of this invention occur simultaneously, eliminating the need for additional adjustments and simplifying operation. Furthermore, the rotational movement ensures the reliability of the lock connection.

[0015] 2. This invention converts the up-and-down movement of the wedge block into the axial movement of the lock cylinder, thereby realizing the adjustment of the gap width of the lock groove, greatly improving the adjustment capability of the lock groove and enhancing the adaptability of the lock.

[0016] 3. By designing a connecting joint, this invention overcomes the common problem that connection structures must rely on profiles with locking grooves to achieve universality, greatly improving the flexibility of connection; at the same time, through the matching of the connecting joint, this invention can achieve multi-angle butt connection between profiles with the simplest structure.

[0017] 4. This invention has strong versatility, enabling rapid and flexible assembly of various frame structures. It features reliable connections, simple operation, and an aesthetically pleasing appearance with no unnecessary accessories after assembly, resulting in good overall integrity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional appearance structure of the connecting lock and the profile of the present invention; Figure 2 This is a schematic diagram of the locking connection between the lock and the profile according to the present invention; Figure 3 This is a schematic diagram of the exploded structure of the lock body in this invention; Figure 4 This is a schematic diagram of the lock body in the released state of the present invention; Figure 5 for Figure 4 Schematic diagram of the axial section of the AA structure; Figure 6 for Figure 4 Axial sectional view of the middle BB structure; Figure 7 This is a schematic diagram of the locking state structure of the lock body in this invention; Figure 8 This is a schematic diagram of the lock body structure involved in Embodiment 2; Figure 9 This is a schematic diagram of the lock body structure involved in Embodiment 3.

[0019] In the diagram: 1. Connecting joint; 11. Lock hole; 2. Profile; 21. Lock cavity; 22. Through hole; 3. Lock body; 31. Lock case; 311. Positioning hole; 32. Lock cylinder; 321. Angled hole; 3211. Sliding bevel; 322. Long slotted hole; 323. Center screw hole; 33. Locking sleeve; 331. Guide arc groove; 332. Lock tongue; 34. Lock groove; 41. Return spring; 42. Angled wedge; 421. Bolt hole; 43. Locking bolt; 44. Locking nut; 5. Guide post; 6. Countersunk screw; 7. Sliding washer. Detailed Implementation

[0020] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] Example 1: like Figure 1 As shown, the connecting lock involved in this embodiment includes a lock body 3 and a connecting connector 1. The connecting connector 1 can realize the connection between the profiles 2 in up to six directions.

[0022] like Figure 1 and Figure 2 As shown: In this embodiment, the profile 2 is a square structure with the same cross-section as the connecting joint, so that it can form an integral and indistinguishable docking structure by connecting with the lock body 3. One or both ends of the profile are provided with a lock cavity 21 that can accommodate the lock body, and are provided with a through hole 22 for the locking bolt to pass through.

[0023] like Figure 3As shown: The lock body 3 includes a lock shell 31, a lock cylinder 32, a locking sleeve 33, an axial drive assembly for driving the lock cylinder 32 to move axially within a certain range in the lock shell, and a rotary drive assembly for driving the locking sleeve to rotate; the axial drive assembly includes a return spring 41, a wedge block 42, a locking bolt 43, and a locking nut 44; the rotary drive assembly includes a guide post 5; the wedge block 42 is provided with a bolt hole 421 that matches the locking bolt, and similarly, the lock shell is provided with a positioning hole 311 for the locking bolt to pass through; the rear end of the lock cylinder 32 is provided with an inclined hole 321 that accommodates and matches the up-and-down movement of the wedge block and an elongated hole 322 that limits the axial displacement of the lock cylinder 32, and the inclined hole is provided with a sliding inclined surface 3211 that matches the inclined surface of the wedge block; as Figures 3 to 6 As shown, during connection, the return spring 41 is installed into the lock housing 31 with one end acting on the bottom of the lock housing. The wedge block 42 is installed into the inclined hole 321 of the lock cylinder. Then, the lock cylinder 32 is installed into the lock housing 31. The locking bolt 43 passes through the positioning hole 311 of the lock housing, the elongated hole 322 of the lock cylinder, and the bolt hole 421 of the wedge block to fix the relative positions of the three. The other end of the return spring 41 acts on the end face of the lock cylinder. When the locking bolt 43 and the lock housing 31 are fixed in position, the return spring 41 is in a compressed state. When the locking bolt 43 is locked and rotated, the wedge block 42 can be controlled to move upward along the locking bolt 43. The inclined surface of the wedge block presses against the sliding inclined surface, causing the sliding inclined surface to slide relative to each other, thereby driving the lock cylinder 32 to move axially backward within the range specified by the elongated hole 322, compressing the return spring 41. Finally, the position is fixed by fixing the locking nut 44 at the front end of the locking bolt.

[0024] like Figures 3 to 6 As shown, the locking sleeve 33 has a cylindrical structure. The bottom of the locking sleeve extends outward to form a locking tongue 332. A guide arc groove 331 is provided on the side wall of the locking sleeve 33. A central hole is provided at the center of the bottom of the locking sleeve for the countersunk screw 6 to pass through. The open end of the locking sleeve is fitted onto the front end of the lock cylinder 32. The front end of the lock cylinder is provided with a central screw hole 323. The locking sleeve 33 and the lock cylinder 32 are connected by the countersunk screw 6 and the central screw hole 323 to achieve axial fixation of the position of the locking sleeve 33. In order to ensure that the axial position of the locking sleeve 33 is fixed and does not affect its rotation or that the countersunk screw is not rotated when the locking sleeve rotates, sliding washers 7 are provided on both sides of the central screw hole 323 in this embodiment. Figures 3 to 6 As shown, when the lock cylinder 32 is installed into the lock shell, the bolt 332 is located on the outside of the lock shell, and a lock groove 34 is formed between the bolt 332 and the front face of the lock shell 31; the shape and radius of the locking sleeve 33 inserted into the side wall of the lock shell are adapted to the inner cavity of the lock shell to ensure the stability of the lock cylinder operation.

[0025] like Figure 3 and Figure 6As shown, in this embodiment, the guide post 5 is a stud, which is fixed on the lock housing 31 and its front end is inserted into the guide arc groove 331. When the lock cylinder 32 drives the locking sleeve 33 to move axially, the locking sleeve 33 is rotated through the cooperation of the guide post 5 and the guide arc groove 331.

[0026] In this embodiment, as Figures 1 to 4 As shown: The latch formed on the locking sleeve 33 has a square structure, and the six connecting end faces of the connecting joint are respectively provided with square lock holes 11 that are adapted to the shape and size of the latch. When docking with the profile 2, the lock body 3 is built into the lock cavity 21 set in the profile through the lock shell 31; and the lock position is fixed by the lock bolt 43 passing through the through hole 22; the lock body is inserted into the lock hole 11 on the connecting end face of the connecting joint through the latch 332 of the locking sleeve, and the locking bolt 43 causes the lock cylinder 32 to move backward and reduce the width of the lock groove 34; while the locking sleeve 33 moves backward, it rotates due to the cooperation of the guide post 5 and the guide arc groove 331. After the locking sleeve rotates, the latch 332 locks the four walls of the lock hole 11 of the connecting joint, thereby realizing the locking connection between the profile 2 and the connecting joint 1. In the same operation, multiple angles and multiple profiles can be connected through the connecting joint 1.

[0027] Working principle: In the loose state, the locking tongue 332 of the locking sleeve of the lock body 3 can be flexibly inserted into the lock hole 11 of the connecting joint; when tightening is required, the locking bolt 43 is controlled to rotate the locking sleeve 33 to the optimal 45°, such as... Figure 7 As shown; at this time, since the keyhole 11 has not rotated, the locking tongue 332 of the locking sleeve is misaligned with the keyhole 11, thereby allowing the locking tongue to engage with the four walls of the keyhole to achieve the locking function. In this embodiment, because a square-structured locking tongue is used, the diagonal length of the locking tongue is greater than the side length. After rotation, the four corners of the locking tongue can fully engage with the four walls of the keyhole, and due to the symmetrical structure, the reliability of the locking is guaranteed.

[0028] This invention uses a method of controlling the connection between the profile and the connecting joint by rotating the locking bolt on the side of the profile. The operation is simple. The external shape of the lock shell can be square or round, etc., mainly designed according to the shape of the profile or the shape of the lock cavity. At the same time, the connecting joint can be made into a three-dimensional structure with multiple angles as needed, so as to flexibly meet the construction needs of various structures. The connection structure is firm, the operation is simple, and the appearance is beautiful and elegant with no extra accessories.

[0029] Example 2: like Figure 8As shown, based on Embodiment 1, the locking tongue 332 of the locking sleeve is designed as an elliptical structure, and the locking hole 11 on the connecting end face of the connecting connector is also designed as a matching elliptical structure. By controlling the difference between the major axis and minor axis of the elliptical structure, the curvature of the guide arc groove 331 is controlled, so that when the lock body 3 is loosened to locked, the locking sleeve 33 rotates 90 degrees, thereby achieving the optimal locking angle. This can greatly improve the gripping force and load-bearing capacity of the lock connection.

[0030] Example 3: like Figure 9 As shown, based on Embodiment 1, the locking tongue 332 of the locking sleeve is designed as a rectangular structure, and the locking hole 11 on the connecting end face of the connecting connector is also designed as a matching rectangular structure. By controlling the difference in side length of the rectangular structure and controlling the curvature of the guide arc groove 331, the locking sleeve 33 rotates 90 degrees when the lock body 3 is loosened to locked, thereby achieving the optimal locking angle, which can also greatly improve the gripping force and load-bearing capacity of the lock connection.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms, such as the shape of the locking sleeve, the shape and structure of the connecting joint, etc., without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A connecting lock for multi-directional connection between profiles, comprising a lock body and a connecting joint; The lock body includes a lock shell, a lock cylinder built into the lock shell, a locking sleeve, an axial drive assembly for driving the lock cylinder to move axially within a certain range in the lock shell, and a rotary drive assembly for driving the locking sleeve to rotate. The axial drive assembly includes a return spring, a wedge block, a locking bolt, and a locking nut. The wedge block has a bolt hole. The rear end of the lock cylinder has an oblique hole for accommodating and matching the up-and-down movement of the wedge block and an elongated hole for limiting the axial displacement of the lock cylinder. The oblique hole has a sliding inclined surface that matches the oblique surface of the wedge block. The locking bolt passes through the elongated hole and the bolt hole, and its two ends protrude from the corresponding lock shell. Rotating the locking bolt controls the up-and-down movement of the wedge block. The relative sliding of the oblique surface and the sliding inclined surface enables the axial movement of the lock cylinder within the range specified by the elongated hole. The return spring is located between the rear end face of the lock cylinder and the bottom of the lock shell. The locking sleeve is movably connected to the front end of the lock cylinder. The front end of the locking sleeve extends out of the lock shell and forms a lock groove with the lock shell. The front end of the locking sleeve has a non-circular structure. Connecting joint: It has at least two connecting end faces that are connected to the profile, and the connecting end faces are provided with locking holes that match the front end of the locking sleeve; During connection, the lock body is connected to the lock cavity set in the profile connection end through the lock shell; the front end of the locking sleeve is inserted into the lock hole on the end face of the connecting joint, and the lock cylinder is moved backward to reduce the width of the lock groove by the axial drive component; at the same time, the locking sleeve is rotated by the rotation drive component, so that the front end of the locking sleeve locks the four walls of the lock hole of the connecting joint, thereby realizing the locking connection between the lock body and the connecting joint.

2. A connection lock according to claim 1, characterized in that: The rotary drive assembly includes a guide post, and a guide arc groove is provided on the side wall of the locking sleeve. The guide post is fixed on the lock housing, and its front end is inserted into the guide arc groove. When the lock cylinder drives the locking sleeve to move axially, the rotation of the locking sleeve is realized simultaneously through the guide post.

3. A connection lock according to claim 1, characterized in that: The profile lock cavity has through holes corresponding to the locking bolt positions. During connection, both ends of the locking bolt pass through the through holes to fix the lock body.

4. A connection lock according to claim 1, characterized in that: The return spring is in a compressed state.

5. A connection lock according to claim 1, characterized in that: The front end of the locking sleeve is square, rectangular, or oval.

6. A connection lock according to claim 5, characterized in that: The lock cylinder has a central screw hole, and the front end of the locking sleeve has a central hole and a countersunk screw. The locking sleeve is movably connected to the lock cylinder through the connection between the countersunk screw and the central screw hole.

7. A connection lock according to claim 6, characterized in that: The center hole is provided with sliding washers on both sides, and the locking sleeve is movably connected to the countersunk screw and the lock cylinder through the sliding washers.

8. A connection lock according to claim 2, characterized in that: The guide post is a stud, which is threadedly fixed to the lock housing.

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