Quick-assembly connection structure for the outer frame of a light box, as well as a corresponding light box frame.

Abstract

A quickly mountable connecting structure for the outer frame of a light box, characterized in that it comprises an intermediate connecting piece (1) as well as a first connecting rod (2) and a second connecting rod (3), each arranged at the two ends of the intermediate connecting piece (1), that a locking mechanism is arranged between the first connecting rod (2) and one end of the intermediate connecting piece (1) as well as between the second connecting rod (3) and the other end of the intermediate connecting piece (1), that the locking mechanism serves to press the intermediate connecting piece (1) to the associated first connecting rod (2) or second connecting rod (3) and to apply a force so that the intermediate connecting piece (1) is firmly connected to the corresponding first connecting rod (2) or second connecting rod (3);wherein the locking mechanism comprises a pressure lever (4), the pressure lever (4) being hinged to one of the first connecting rods (2) and the intermediate connecting piece (1) and to the other of the second connecting rod (3) and the intermediate connecting piece (1), a pressure piece (5) being arranged on the pressure lever (4), a pressure groove (6) being formed on the other of the first connecting rod (2) and the intermediate connecting piece (1) and on the other of the second connecting rod (3) and the intermediate connecting piece (1), and the pressure piece (5) bearing in the pressure groove (6).

Description

Technical field

[0001] The present utility model relates to the technical field of light boxes, in particular to a quickly mountable connection structure for the outer frame of a light box and a corresponding light box frame. State of the art

[0002] Lightboxes, designed to enhance visual impact through an integrated light source, are now widely used in commercial advertising, retail and product displays, public wayfinding, and cultural and artistic applications. Their functionality depends on a stable and reliable supporting structure. Currently, the outer frames of lightboxes typically feature a detachable design to facilitate storage and transport. Adjacent connecting rods are usually mounted using intermediate connectors, employing a telescopic locking mechanism similar to a ribbed screen at the connection points. This type of connection exhibits significant structural flaws, resulting in insufficient strength between the connectors and the connecting rods.This results in noticeable wobbling even under slight force applied to the entire frame. In severe cases, the frame can warp or a rod can even break. This problem not only reduces the frame's lifespan but also increases actual operating costs due to frequent maintenance and replacement. Content of the utility model

[0003] The technical problem that this utility model is intended to solve is as follows: In known light boxes, the adjacent connecting rods of the outer frame are usually mounted using intermediate connectors, with a telescopic locking device similar to a ribbed screen structure being used at the connection points. This type of connection results in insufficient fastening strength between the connectors and the connecting rods, so that the entire frame wobbles considerably even under slight force. In severe cases, the frame can warp or the rods can even break. To solve these problems, this utility model provides a quick-assembly connecting structure for the outer frame of a light box, as well as a corresponding light box frame.

[0004] The technical solution employed by this utility model to solve the technical problem is as follows: A quickly assembled connecting structure for the outer frame of a light box comprises an intermediate connector and a first connecting rod and a second connecting rod, each arranged at the two ends of the intermediate connector. A locking mechanism is arranged between the first connecting rod and one end of the intermediate connector, and between the second connecting rod and the other end of the intermediate connector. The locking mechanism serves to press the intermediate connector against the corresponding first or second connecting rod and to apply a force such that the intermediate connector is firmly connected to the respective first or second connecting rod.

[0005] The locking mechanism comprises a pressure lever. The pressure lever is pivotally connected to one of the first connecting rods and the intermediate connecting piece, and to the other of the second connecting rod and the intermediate connecting piece. A pressure piece is arranged on the pressure lever. A pressure groove is formed on the other side of each connection between the first connecting rod and the intermediate connecting piece, and on the other side of each connection between the second connecting rod and the intermediate connecting piece. The pressure piece rests in the pressure groove. In contrast to the prior art, in the present solution the intermediate connecting piece is connected at both its ends to the first connecting rod and the second connecting rod.The locking mechanism applies a force to one end of the intermediate connector, pressing it against the first connecting rod, and a force to the other end of the intermediate connector, pressing it against the second connecting rod, thus creating a secure connection between the intermediate connector and both the first and second connecting rods. This significantly reduces the wobble of the outer frame under load and ensures a stable and reliable connection between the intermediate connector and both the first and second connecting rods.

[0006] To better prevent wobbling between the intermediate connector on the one hand and the first and second connecting rods on the other, the intermediate connector, in preferred embodiments, comprises a base body and a first plug-in section arranged on the base body and extending outwards. A first plug-in groove corresponding to the first plug-in section is formed on both the first and second connecting rods. The first plug-in section is arranged in the first plug-in groove.The interaction of the first plug-in section arranged on the base body with the first plug-in groove increases the connection strength between the intermediate connector on the one hand and the first connecting rod and the second connecting rod on the other hand, while at the same time further reducing wobbling between the intermediate connector on the one hand and the first connecting rod and the second connecting rod on the other hand.

[0007] To facilitate insertion of the first plug-in section into the first plug-in slot, the first plug-in section is stepped in preferred embodiments. The narrow end of the first plug-in section faces away from the base body. Due to the stepped shape, the narrow end of the first plug-in section enters the plug-in slot first, which facilitates operation by the operator.

[0008] To further increase the connection strength between the intermediate connector on the one hand and the first and second connecting rods on the other, a second plug-in section is arranged on the base body in preferred embodiments. The second plug-in section is arranged corresponding to the first plug-in section and extends outwards in the direction of the first plug-in section. The length of the second plug-in section is shorter than that of the first plug-in section. A second plug-in groove matching the second plug-in section is formed on both the first and second connecting rods. The second plug-in section is arranged in the second plug-in groove.The second plug-in section arranged on the base body, the length of which is smaller than that of the first plug-in section, further increases the connection strength between the intermediate connector on the one hand and the first connecting rod and the second connecting rod on the other, by means of the interaction of the second plug-in section with the second plug-in groove, and also prevents wobbling of the first connecting rod and the second connecting rod.

[0009] To prevent the pressure lever from rotating due to the return force of the locking mechanism, in preferred embodiments the pressure lever is pivotally connected to one of the first connecting rods and the intermediate connector, and a detent mechanism is arranged on each of the second connecting rods and the intermediate connector. The detent mechanism serves to engage the pressure lever in the locked position on one of the first connecting rods and the intermediate connector, as well as on the other of the second connecting rods and the intermediate connector. The detent mechanism arranged on the pressure lever exerts a limiting effect on the pressure lever and prevents it from rotating.

[0010] To implement the locking mechanism, in preferred embodiments the locking mechanism comprises a locking hook arranged on the push lever. A locking groove corresponding to the locking hook is formed on one of the connecting rods and the intermediate connecting piece, as well as on one of the connecting rods and the intermediate connecting piece. The locking hook engages in the locking groove. The interaction of the locking hook with the locking groove results in the push lever being locked in place.

[0011] In preferred embodiments, the outer frame consists of an upper profile, two side profiles and a lower profile, forming its essential components.

[0012] The quick-assembly connecting structure can be designed as a connecting structure for a portion of the outer frame profiles. In preferred embodiments, the first connecting rod and the second connecting rod each represent one of the upper profile, the side profiles, and the lower profile, respectively. The intermediate connecting piece is a straight connecting piece.

[0013] The quick-assembly connecting structure can also be designed as a connecting structure for another part of the outer frame profiles. In preferred embodiments, the first connecting rod and the second connecting rod each represent any two from the top profile, the side profiles, and the bottom profile. The intermediate connecting piece is an angle connector.

[0014] A light box frame features the previously described quick-mounting connection structure for the outer frame of a light box.

[0015] The advantages of the utility model are as follows: The quickly assembled connecting structure for the outer frame of a light box, as well as a corresponding light box frame according to the present utility model, ensure that, in use, the intermediate connecting piece is connected at both its ends to the first and second connecting rods. By means of the locking mechanism, a force is exerted on one end of the intermediate connecting piece in the direction of the first connecting rod, pressing it against the rod, and a force is exerted on the other end of the intermediate connecting piece in the direction of the second connecting rod, pressing it against the rod, thereby creating a firm connection between the intermediate connecting piece on the one hand and the first and second connecting rods on the other.This significantly reduces the wobbling of the outer frame under load, while simultaneously ensuring a stable and reliable connection between the intermediate connector on the one hand and the first and second connecting rods on the other. This eliminates the problem in the prior art where adjacent connecting rods of the outer frame in light boxes are usually mounted via intermediate connectors, and a telescopic locking mechanism similar to an umbrella stand is used at the connection points. This results in insufficient connection strength between the connector and the connecting rod, causing the entire frame to wobble considerably even under slight loads, and in severe cases, this can lead to the frame tilting or even the rods breaking. Description of the attached drawings

[0016] The present utility model is further explained with reference to the drawings and examples of embodiment. Fig. Figure 1 is a front view according to embodiment 1 of the present utility model; Fig. 2 is a sectional view along AA in Fig. 1; Fig. 3 is a sectional view along BB in Fig. 1; Fig. 4 is a section view along CC in Fig. 1; Fig. 5 is an enlarged representation of D in Fig. 2; Fig. 6 is an enlarged representation of E in Fig. 2; Fig. 7 is an enlarged representation of F in Fig. 2; Fig. 8 is an enlarged representation of G in Fig. 3; Fig. 9 is an enlarged representation of H in Fig. 4; Fig. Figure 10 is a structural representation of the intermediate connecting piece as a straight connecting piece according to embodiment 1 of the present utility model; Fig. Figure 11 is a structural representation of the intermediate connecting piece as an angle connecting piece according to embodiment 1 of the present utility model; Fig. Figure 12 is a three-dimensional structural representation according to embodiment 5 of the present utility model.

[0017] In the drawings: 1 intermediate connector; 2 first connecting rod; 3 second connecting rod; 4 pressure levers; 5 printing pieces; 6 pressure groove; 7 first plug section; 8 first slot; 9 second plug section; 11 locking hooks; 12 locking grooves; 13 outer frames; 14 upper profile; 15 side profile; 16 lower profile; 17 basic shapes. Examples of implementation

[0018] Example 1: As in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10 to Fig. Figure 11 shows a quick-assembly connection structure for the outer frame of a light box comprising an intermediate connector 1, a first connecting rod 2, and a second connecting rod 3. The first connecting rod 2 and the second connecting rod 3 are each arranged at the two ends of the intermediate connector 1. A locking mechanism is arranged between the first connecting rod 2 and one end of the intermediate connector 1, and between the second connecting rod 3 and the other end of the intermediate connector 1. The locking mechanism serves to press the intermediate connector 1 against the corresponding first connecting rod 2 or second connecting rod 3 and to apply a force such that the intermediate connector 1 is firmly connected to the respective first connecting rod 2 or second connecting rod 3.

[0019] The locking mechanism comprises a pressure lever 4. The pressure levers 4 are hinged to the first connecting rod 2 and the associated second connecting rod 3. A pressure piece 5 is arranged on the pressure lever 4. At each of the two ends of the intermediate connecting piece 1, a pressure groove 6 is formed that fits the pressure piece 5. The pressure piece 5 rests in the pressure groove 6. Depending on which component the pressure lever 4 is hinged to, the subsequent locking mechanism engages with the corresponding component. For example, if the pressure lever 4 is hinged to the first connecting rod 2, then the pressure lever 4 engages with the first connecting rod 2.

[0020] The intermediate connector 1 comprises a base body 17 and a first plug-in section 7 arranged on the base body 17 and extending outwards. Both the first connecting rod 2 and the second connecting rod 3 each have a first plug-in groove 8 that fits the first plug-in section 7. The first plug-in section 7 is arranged in the first plug-in groove 8. The first plug-in section 7 is stepped, with its narrow end facing away from the base body 17. A second plug-in section 9 is arranged on the base body 17. The second plug-in section 9 is arranged corresponding to the first plug-in section 7 and extends outwards in the direction of the first plug-in section 7. The length of the second plug-in section 9 is shorter than that of the first plug-in section 7. Both the first connecting rod 2 and the second connecting rod 3 each have a second plug-in groove that fits the second plug-in section 9.The second plug section 9 is located in the second plug groove. The pressure groove 6 is located on the first plug section 7.

[0021] The pressure lever 4 is pivotally connected to the first connecting rod 2 and the second connecting rod 3, and a locking mechanism is arranged on both the first connecting rod 2 and the second connecting rod 3. The locking mechanism serves to engage the pressure lever 4 in the locked position on the corresponding first connecting rod 2 and second connecting rod 3. The locking mechanism comprises a locking hook 11 arranged on the pressure lever 4. A locking groove 12 corresponding to the locking hook 11 is formed on both the first connecting rod 2 and the second connecting rod 3. The locking hook 11 is engaged in the locking groove 12. The pressure piece 5 is located between the locking hook 11 and the pivot point of the pressure lever 4.

[0022] The outer frame 13 is formed from an upper profile 14, two side profiles 15, and a lower profile 16. The first connecting rod 2 and the second connecting rod 3 each consist of one of the upper profile 14, the side profiles 15, and the lower profile 16, respectively. The intermediate connecting piece 1 is a straight connecting piece.

[0023] The first connecting rod 2 and the second connecting rod 3 each represent any two from the upper profile 14, the side profiles 15, and the lower profile 16. The intermediate connecting piece 1 is an angle connector. For example, the intermediate connecting piece 1 is an angle connector between the side profile 15 and the lower profile 16, as is the case between the upper profile 14 and the side profile 15.

[0024] Exemplary embodiment 2: Exemplary embodiment 2 represents a second embodiment of the locking mechanism. The locking mechanism comprises a pressure lever 4. The pressure lever 4 is pivotally connected to the intermediate connecting piece 1. A pressure piece 5 is arranged on the pressure lever 4. A pressure groove 6 is formed on both the first connecting rod 2 and the second connecting rod 3. The pressure piece 5 rests in the pressure groove 6.

[0025] Exemplary embodiment 3: Exemplary embodiment 3 represents a third embodiment of the locking mechanism. The locking mechanism comprises a pressure lever 4. The pressure lever 4 is articulated to the first connecting rod 2 and to the intermediate connecting piece 1. A pressure piece 5 is arranged on the pressure lever 4. A pressure groove 6 is formed on the intermediate connecting piece 1 and on the second connecting rod 3. The pressure piece 5 rests in the pressure groove 6. Exemplary embodiment 4: Exemplary embodiment 4 represents a fourth embodiment of the locking mechanism. The locking mechanism comprises a pressure lever 4. The pressure lever 4 is articulated to the intermediate connecting piece 1 and to the second connecting rod 3. A pressure piece 5 is arranged on the pressure lever 4. A pressure groove 6 is formed on the first connecting rod 2 and on the intermediate connecting piece 1. The pressure piece 5 rests in the pressure groove 6.Exemplary embodiment 5: Exemplary embodiment 5 represents an application of Exemplary embodiments 1, 2, 3 and 4. As in . Fig. Figure 12 shows a light box frame with the previously described quick-mounting connection structure for the outer frame of a light box.

[0026] The operating principle is as follows: For quick assembly, the corresponding upper profile 14, the two side profiles 15, and the lower profile 16 are each assembled first. Specifically, the first plug-in section 7 of the base body 17 of the intermediate connector 1 is inserted into the corresponding first plug-in groove 8 on the first connecting rod 2, and simultaneously, the second plug-in section 9 is inserted into the second plug-in groove. One end of the base body 17 rests against the first connecting rod 2. The pressure lever 4 is then rotated so that the pressure piece 5 enters the pressure groove 6. The pressure piece 5 exerts a force on the pressure groove 6 and pushes the intermediate connector 1 towards the first connecting rod 2, pressing it into place. At the same time, the locking hook 11 engages in the locking groove 12 and locks the pressure lever 4 onto the first connecting rod 2. This completes the quick assembly between the intermediate connector 1 and the first connecting rod 2.The assembly between the second connecting rod 3 and the intermediate connecting piece 1 is carried out using the same procedure. Thus, the upper profile 14, the two side profiles 15, and the lower profile 16 can be quickly assembled using the preceding steps.

[0027] The assembly between the upper profile 14 and the two side profiles 15, as well as between the two side profiles 15 and the lower profile 16, is carried out in the same manner. The corresponding first connecting rod 2 of the upper profile 14 is quickly assembled to one end of the intermediate connector 1, and the second connecting rod of the side profile 15 is quickly assembled to the other end of the intermediate connector 1. Furthermore, the corresponding first connecting rod 2 of the lower profile 16 is quickly assembled to one end of the intermediate connector 1, and the second connecting rod of the side profile 15 is quickly assembled to the other end of the intermediate connector 1. This completes the entire quick assembly of the outer frame 13.In the outer frame 13 assembled with the present solution, the interaction of the pressure piece 5 and the pressure groove 6 causes all mounted profiles to be pressed firmly against each other by mutual contact forces. This effectively eliminates the need for the prior art telescopic locking device, similar to an umbrella rib structure, between the profiles. In this known structure, large assembly clearances lead to instability of the outer frame 13, which causes it to wobble when force is applied.

[0028] Starting from the above ideal embodiment of the utility model as a model, the competent experts can make numerous variations and modifications based on the above description without deviating from the technical concept of this utility model. The technical scope of protection of this utility model is not limited to the content of the description, but must be determined based on the scope of protection of the claims.

Claims

[1] A quick-assembly connection structure for the outer frame of a light box, characterized by, that it comprises an intermediate connecting piece (1) as well as a first connecting rod (2) and a second connecting rod (3), each of which is arranged at the two ends of the intermediate connecting piece (1), that a locking mechanism is arranged between the first connecting rod (2) and one end of the intermediate connecting piece (1) and between the second connecting rod (3) and the other end of the intermediate connecting piece (1), that the locking mechanism serves to press the intermediate connecting piece (1) towards the associated first connecting rod (2) or second connecting rod (3) and to apply a force so that the intermediate connecting piece (1) is firmly connected to the corresponding first connecting rod (2) or second connecting rod (3);wherein the locking mechanism comprises a pressure lever (4), the pressure lever (4) being hinged to one of the first connecting rods (2) and the intermediate connecting piece (1) and to the other of the second connecting rod (3) and the intermediate connecting piece (1), a pressure piece (5) being arranged on the pressure lever (4), a pressure groove (6) being formed on the other of the first connecting rod (2) and the intermediate connecting piece (1) and on the other of the second connecting rod (3) and the intermediate connecting piece (1), and the pressure piece (5) bearing in the pressure groove (6). [2] The quick-assemble connection structure for the outer frame of a light box according to claim 1, characterized by, that the intermediate connecting piece (1) comprises a base body (17) and a first plug-in section (7) arranged on the base body (17) and extending outwards, that a first plug-in groove (8) matching the first plug-in section (7) is formed on both the first connecting rod (2) and the second connecting rod (3), and that the first plug-in section (7) is arranged in the first plug-in groove (8). [3] The quick-assemble connection structure for the outer frame of a light box according to claim 2, characterized by , that the first plug-in section (7) is formed in a step-like manner, and that the narrow end of the first plug-in section (7) is facing away from the base body (17). [4] The quick-assemble connection structure for the outer frame of a light box according to claim 2 or 3, characterized by, that a second plug-in section (9) is arranged on the base body (17), that the second plug-in section (9) is arranged corresponding to the first plug-in section (7) and extends outwards in the direction of the first plug-in section (7), that the length of the second plug-in section (9) is smaller than that of the first plug-in section (7), that a second plug-in groove matching the second plug-in section (9) is formed on both the first connecting rod (2) and the second connecting rod (3), and that the second plug-in section (9) is arranged in the second plug-in groove. [5] The quick-assemble connection structure for the outer frame of a light box according to claim 1, characterized by, that the pressure lever (4) is hinged to one of the first connecting rod (2) and the intermediate connecting piece (1), that a locking mechanism is arranged on one of the second connecting rod (3) and the intermediate connecting piece (1), and that the locking mechanism serves to lock the pressure lever (4) in the locked state on one of the first connecting rod (2) and the intermediate connecting piece (1) and on one of the second connecting rod (3) and the intermediate connecting piece (1). [6] The quick-assemble connection structure for the outer frame of a light box according to claim 2, characterized by, that the locking mechanism comprises a locking hook (11) arranged on the pressure lever (4), that a locking groove (12) matching the locking hook (11) is formed on one of the first connecting rods (2) and the intermediate connecting piece (1) and on one of the second connecting rods (3) and the intermediate connecting piece (1), and that the locking hook (11) is engaged in the locking groove (12). [7] The quick-assemble connection structure for the outer frame of a light box according to claim 1, characterized by , that the outer frame (13) is formed from an upper profile (14), two side profiles (15) and a lower profile (16). [8] The quick-assemble connection structure for the outer frame of a light box according to claim 7, characterized by, that the first connecting rod (2) and the second connecting rod (3) each represent one of the upper profile (14), the side profiles (15) and the lower profile (16), and that the intermediate connecting piece (1) is a straight connecting piece. [9] The quick-assemble connection structure for the outer frame of a light box according to claim 7 or 8, characterized by , that the first connecting rod (2) and the second connecting rod (3) each represent any two from the upper profile (14), the side profiles (15) and the lower profile (16), and that the intermediate connecting piece (1) is an angle connecting piece. [10] A lightbox frame, characterized by that it has the quick-assemble connection structure for the outer frame of a light box according to one of claims 1 to 9.

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