Invisible connecting device

Abstract

The utility model belongs to the technical field of clamp accessories, and provides an invisible connecting device which comprises a first connecting mechanism and a second connecting mechanism. The first connecting mechanism comprises a first embedded part and a movable insert arranged in the first embedded part, the first embedded part comprises a hollow cylinder and at least two elastic pieces connected to one end of the cylinder, the elastic pieces are arranged in the circumferential direction of the cylinder at intervals, one ends of the elastic pieces are connected with the cylinder, and the other ends of the elastic pieces extend in the direction away from the cylinder and are close to each other. The tail ends of part of or all the elastic pieces are provided with bends away from the axis of the barrel, and the inner sides of the elastic pieces and / or the barrel are provided with anti-disengaging protrusions for preventing the movable insert from sliding out of the first embedded part. The second connecting mechanism comprises a second embedded part and a connecting rod, one end of the connecting rod is detachably connected with the second embedded part, the other end of the connecting rod is provided with a rod head, and the elastic piece is provided with a clamping piece connected with the rod head in a clamped mode. The invisible connecting device has the advantages of being simple in structure, convenient to install and high in attractiveness.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture accessories, in particular to an invisible connection device. Background Art

[0002] Furniture refers to the essential equipment and facilities for humans to maintain normal life, engage in production practice and carry out social activities. Furniture has also been continuously developing and innovating with the times. Today, there are many categories, different materials, complete varieties and different uses. It is an important foundation for building a working and living space. In the production and assembly process of modern prefabricated furniture, connectors are needed to connect the panels.

[0003] Traditional furniture connectors have a complex structure and are difficult to install. Before assembly, holes need to be drilled in the plates and locking nuts and connecting screws need to be embedded in the two plates. In order to perform the locking operation, the rod head of the connecting screw needs to be inserted into the locking nut and then the locking nut needs to be tightened with a screwdriver. Therefore, the locking nut must be exposed, which affects the appearance of the furniture. In addition, the exposed nut is prone to rust. The only way to solve this problem is to cover the nut hole with a sealing piece, but there are still problems of color difference and low installation efficiency.

[0004] The technical problem to be solved by the present application is: how to solve the problem that the installation efficiency of existing furniture connectors is low and affects the appearance of the furniture. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide an invisible connection device which has the characteristics of simple and compact structure, convenient installation, good aesthetics without being exposed after installation.

[0006] The technical solution adopted by the utility model is: an invisible connection device, including a first connection mechanism and a second connection mechanism;

[0007] The first connecting mechanism includes a first embedded part and a movable insert built into the first embedded part, the first embedded part includes a hollow cylinder, at least two spring pieces connected to one end of the cylinder, each spring piece is arranged at intervals along the circumference of the cylinder, one end of the spring piece is connected to the cylinder, and the other end extends in a direction away from the cylinder and approaches each other, the ends of some or all of the spring pieces are provided with a bend away from the axis of the cylinder, and the inner side of the spring piece and / or the cylinder is provided with an anti-drop protrusion to prevent the movable insert from sliding out of the first embedded part;

[0008] The second connecting mechanism comprises a second embedded part and a connecting rod, one end of the connecting rod is detachably connected to the second embedded part, the other end of the connecting rod is provided with a rod head, and the spring sheet is provided with a clamping part clamped with the rod head.

[0009] The invisible connection device of the utility model has the characteristics of simple structure and convenient installation. Since the anti-dropping protrusion is arranged inside the first embedded part, the movable insert can be placed in the first embedded part during the production process of the accessory, which can prevent the movable insert from sliding out of the first embedded part during transportation or installation, and can also prevent missing accessories. During installation, holes for embedding the first embedded part and the second embedded part are firstly opened on the plate, and then the spring piece of the first embedded part is placed inwardly into the embedded hole of one of the plates, and the second embedded part is placed in the embedded hole of the other plate, and then the connecting rod is connected to the second embedded part, and then the connecting rod is The rod head is inserted into the cylinder, and the rod head pushes the movable insert to the end of the spring sheet, and the movable insert stretches the spring sheet. The bending of the end of the spring sheet abuts the inner wall of the embedded hole, and under the abutment of the rod head, the movable insert is prevented from retreating, and the first embedded part is prevented from falling off. Under the action of the clamping part, the rod head can avoid separation from the clamping part, so that the two plates are connected together. When the two plates need to be separated, an external force greater than the clamping force of the clamping part clamping the rod head needs to be applied to separate them. The structure has high reliability, and the various accessories after installation are not exposed, which improves the aesthetics of the furniture, reduces the chance of rusting of the accessories, and extends the service life of the furniture.

[0010] In some embodiments, the spring clips include two first spring clips and two second spring clips, the two first spring clips are arranged opposite to each other, the two second spring clips are arranged opposite to each other, the height of the first spring clip is lower than the height of the second spring clip, and a second bend is arranged at the end of the second spring clip.

[0011] By adopting the above technical solution, the end of the first spring piece is the clamping part to prevent the rod head from retreating, and the rod head pushes the movable insert to the end of the second spring piece, allowing the end of the second spring piece to open, so that the second bend abuts against the inner wall of the embedded hole, preventing the first embedded part from falling out of the plate.

[0012] In some embodiments, a first bend is provided at the end of the first elastic sheet.

[0013] By adopting the above technical solution, an inclined guide surface is formed at the first bend. When the two plates need to be separated, the first bend can guide the rod head to retreat to prevent the rod head from getting stuck.

[0014] In some embodiments, the club head is a structure with a large middle portion and gradually narrowed ends.

[0015] By adopting the above technical solution, the inclined surface at one end of the rod head close to the first embedded part can guide the rod head to pass over the clamping part when the connecting rod and the first embedded part are inserted into each other, thereby reducing the resistance of the rod head passing over the clamping part and facilitating the splicing of the two panels. The inclined surface at one end of the rod head away from the first embedded part can prevent the rod head from getting stuck when the two panels are separated, thereby preventing the two panels from being unable to be separated.

[0016] In some embodiments, an adjustment slot is provided at one end of the barrel away from the elastic sheet.

[0017] By adopting the above technical solution, the adjusting slot can be used with a screwdriver or a special tool to rotate the barrel, thereby adjusting the orientation of the spring.

[0018] In some embodiments, the clamping member is a protrusion on the inner side of the spring.

[0019] By adopting the above technical solution, a protrusion can be provided on the inner side of the spring sheet to clamp the club head and prevent the club head from retreating.

[0020] In some embodiments, an expansion groove is provided in the second embedded part along the axial direction.

[0021] By adopting the above technical solution, the expansion groove can expand the outer diameter of the second embedded part when the connecting rod is connected to the second embedded part, so as to prevent the second embedded part from falling out of the embedded hole.

[0022] In some embodiments, an outer peripheral surface of the second embedded part is provided with an external thread.

[0023] By adopting the above technical solution, the second embedded component can be easily placed in the embedded hole.

[0024] In some embodiments, the connecting rod is threadedly connected to the second embedded part, and a tightening groove is provided on the rod head.

[0025] By adopting the above technical solution, it is convenient to use a tool to screw the connecting rod into the second embedded part and lock it.

[0026] In some embodiments, a buffer is sleeved on the middle portion of the connecting rod, and the diameter of the buffer is larger than the diameter of the rod head and smaller than the inner diameter of the cylinder.

[0027] By adopting the above technical solution, the buffer can reduce the gap between the connecting rod and the inner hole of the cylinder, reduce the swing amplitude of the connecting rod in the cylinder, and improve the stability of the two plates after connection. At the same time, the use of plastic buffer can reduce the noise generated by the friction between the connecting rod and the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the invisible connection device of the first embodiment of the utility model;

[0029] Figure 2 for Figure 1 A schematic structural diagram of a first connecting mechanism in the invisible connecting device shown;

[0030] Figure 3 for Figure 1 A schematic structural diagram of a second connecting mechanism in the invisible connecting device shown;

[0031] Figure 4 It is a structural schematic diagram of the first connecting mechanism in the invisible connecting device of the second embodiment of the utility model;

[0032] In the figure: 100, invisible connecting device; 10, first connecting mechanism; 11, first embedded part; 111, cylinder; 112, spring piece; 112a, first spring piece; 112b, second spring piece; 113, bend; 113a, first bend; 113b, second bend; 114, anti-drop protrusion; 115, clamping part; 116, adjustment groove; 12, movable insert; 20, second connecting mechanism; 21, second embedded part; 211, expansion groove; 22, connecting rod; 221, rod head; 222, rod body; 223, screw; 224, buffer; 225, tightening groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When the number of an element is referred to as "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] First embodiment:

[0037] See also Figures 1 to 3, which is a preferred embodiment of the utility model, is an invisible connection device 100, comprising a first connection mechanism 10 and a second connection mechanism 20; the first connection mechanism 10 comprises a first embedded part 11 and a movable insert 12 built into the first embedded part 11, the first embedded part 11 comprises a hollow cylinder 111 in the middle, at least two spring pieces 112 connected to one end of the cylinder 111, each spring piece 112 is arranged at intervals along the circumference of the cylinder 111, and one end of the spring piece 112 is connected to the cylinder 111, and the other end is facing away from the cylinder 111. The ends of some or all of the spring pieces 112 are provided with a bend 113 away from the axis of the cylinder 111, and the inner side of the spring piece 112 and / or the cylinder 111 is provided with an anti-drop protrusion 114 to prevent the movable insert 12 from sliding out of the first embedded part 11; the second connecting mechanism 20 includes a second embedded part 21 and a connecting rod 22, one end of the connecting rod 22 is detachably connected to the second embedded part 21, and the other end of the connecting rod 22 is provided with a rod head 221, and the spring piece 112 is provided with a clamping part 115 clamped with the rod head 221. The invisible connection device 100 of the present application has the characteristics of simple and compact structure, convenient installation, good aesthetics without being exposed after installation.

[0038] In order to prevent the bends 113 from interfering with the first embedded component 11 when it is installed in the embedded hole, when the spring pieces 112 are not opened, the diameter of the circle surrounded by the edges of the bends 113 should be smaller than the outer diameter of the cylinder 111 .

[0039] Optionally, in order to balance the force, when there are two spring pieces 112 , the two spring pieces 112 should be arranged opposite to each other; when there are more than two spring pieces 112 , the spring pieces 112 should be evenly spaced along the circumference of the cylinder 111 .

[0040] In this embodiment, the movable insert 12 is a spherical structure. In other embodiments, the movable insert 12 can also be set to a cylindrical structure or other cubic structures. It only needs to be able to be pushed to the end of the spring piece 112 by the connecting rod 22, so that the movable insert 12 can open the spring piece 112, so that the first embedded part 11 can be firmly stuck in the embedded hole.

[0041] Preferably, the anti-slip protrusion 114 is arranged on the inner side of the spring piece 112. Such an arrangement can shorten the length of the anti-slip protrusion 114 protruding from the inner side of the spring piece 112, thereby reducing the difficulty of processing.

[0042] like Figure 1 and Figure 2As shown, in this embodiment, the spring piece 112 includes two first spring pieces 112a and two second spring pieces 112b, the two first spring pieces 112a are arranged opposite to each other, the two second spring pieces 112b are arranged opposite to each other, the height of the first spring piece 112a is lower than the height of the second spring piece 112b, and the end of the second spring piece 112b is provided with a second bend 113b. In this embodiment, the end of the first spring piece 112a is a clamping member 115 for preventing the rod head 221 from retreating, and the rod head 221 pushes the movable insert 12 to the end of the second spring piece 112b, so that the end of the second spring piece 112b opens, so that the second bend 113b abuts against the inner wall of the embedded hole, and prevents the first embedded part 11 from falling out of the plate.

[0043] Furthermore, a first bend 113a is provided at the end of the first elastic piece 112a. An inclined guide surface is formed at the first bend 113a. When two plates need to be separated, the first bend 113a can guide the rod head 221 to retreat to prevent the rod head 221 from getting stuck.

[0044] Correspondingly, if Figure 1 As shown, the rod head 221 is a structure with a large middle portion and gradually narrowed at both ends. The inclined surface of the rod head 221 close to one end of the first embedded part 11 can guide the rod head 221 to pass over the clamping part 115 when the connecting rod 22 is inserted into the first embedded part 11, and can reduce the resistance of the rod head 221 passing over the clamping part 115, so as to facilitate the splicing of the two panels, while the inclined surface of the rod head 221 far away from one end of the first embedded part 11 can prevent the rod head 221 from getting stuck when the two panels are separated, so that the two panels cannot be separated.

[0045] Preferably, an adjustment slot 116 is provided at one end of the barrel 111 away from the spring piece 112. In this embodiment, the first spring piece 112a mainly plays the role of clamping the rod head 221 to prevent the connection rod 22 from separating from the first embedded part 11, and the movable insert 12 cooperates with the second spring piece 112b to play the role of reliably fixing the first embedded part 11 in the embedded hole of the plate. Therefore, when the embedded hole is set on the side of the plate, when the thickness of the plate is thin, the distance between the inner wall of the embedded hole in the thickness direction of the plate is small. In order to avoid the embedded hole from breaking in the thickness direction of the plate when the second spring piece 112b is stretched, the second spring piece 112b will correspond to the length direction of the plate to ensure reliability during installation. By providing the adjustment slot 116, the barrel 111 can be rotated with a screwdriver or a special tool to adjust the orientation of the spring piece 112.

[0046] Preferably, an expansion groove 211 is provided in the axial direction on the second embedded part 21. The expansion groove 211 can expand the outer diameter of the second embedded part 21 when the connecting rod 22 is connected to the second embedded part 21, so as to prevent the second embedded part 21 from coming out of the embedded hole.

[0047] Furthermore, the outer circumference of the second embedded part 21 is provided with external threads. Since the second embedded part 21 and the embedded hole are usually interference fit, by providing the external threads on the outer circumference of the second embedded part 21, it is convenient to place the second embedded part 21 into the embedded hole.

[0048] In this embodiment, the connecting rod 22 is threadedly connected to the second embedded part 21, and a tightening groove 225 is provided on the rod head 221. In order to use a tool to screw the connecting rod 22 into the second embedded part 21 and lock it, the tightening groove 225 is preferably a "I" groove or a "X" groove for easy operation; of course, in the case of equipped with special tools, the tightening groove 225 can also be set to a shape matched with the special tool as needed.

[0049] like Figure 3 As shown, the connecting rod 22 includes a rod head 221 clamped with the first embedded part 11, a screw rod 223 threadedly connected to the second embedded part 21, and a rod body 222 between the head of the connecting rod 22 and the screw rod 223. Preferably, a buffer 224 is sleeved on the rod body 222, and the diameter of the buffer 224 is larger than the diameter of the rod head 221 and smaller than the inner diameter of the cylinder 111. The buffer 224 can reduce the gap between the connecting rod 22 and the inner hole of the cylinder 111, reduce the swing amplitude of the connecting rod 22 in the cylinder 111, and improve the stability of the two plates after connection. At the same time, the buffer 224 made of plastic material can reduce the noise generated by the friction between the connecting rod 22 and the cylinder 111.

[0050] In this embodiment, the first embedded part 11 is integrally formed. Optionally, the first embedded part 11, the movable insert 12, and the rod head 221, the rod body 222, and the screw 223 of the connecting rod 22 are made of metal, and the second embedded part 21 and the buffer part 224 are made of plastic. Preferably, the material of the first embedded part 11 is manganese steel.

[0051] During installation, holes for pre-embedding the first embedded part 11 and the second embedded part 21 are first opened on the plate, and then the spring piece 112 of the first embedded part 11 is placed inwardly into the embedded hole of one of the plates, and the second embedded part 21 is placed into the embedded hole of the other plate, and then the connecting rod 22 is connected to the second embedded part 21, and then the rod head 221 of the connecting rod 22 is inserted into the cylinder 111, and the rod head 221 pushes the movable insert 12 to the end of the spring piece 112, and the movable insert 12 opens the spring piece 112, and the bend 113 at the end of the spring piece 112 pushes the embedded hole. The inner wall abuts against the rod head 221, and the movable insert 12 is prevented from retreating and the first embedded part 11 is prevented from falling off. Under the action of the clamping part 115, the rod head 221 can avoid separation from the clamping part 115, so that the two plates are connected together. When the two plates need to be separated, an external force greater than the clamping force of the clamping part 115 clamping the rod head 221 needs to be applied to separate them. The structure has high reliability, and the various accessories after installation are not exposed, which improves the aesthetics of the furniture, reduces the chance of rusting of the accessories, and extends the service life of the furniture.

[0052] The invisible connection device 100 of the present application has the characteristics of simple structure and easy installation. An anti-slip protrusion 114 is arranged inside the first embedded part 11. The movable insert 12 can be placed in the first embedded part 11 during the accessory production process, which can prevent the movable insert 12 from slipping out of the first embedded part 11 during transportation or installation, and can also prevent missing accessories, making installation more convenient.

[0053] Second embodiment:

[0054] like Figure 4 FIG. 1 is a schematic diagram of the structure of the first connection mechanism 10 of the invisible connection device 100 of the second embodiment of the utility model. The structure of the invisible connection device 100 of this embodiment is similar to that of the first embodiment, except that the first embedded part 11 includes a cylinder 111 and three spring pieces 112 arranged at one end of the cylinder 111, and the clamping part 115 is a convex block arranged inside the spring piece 112. In this embodiment, a convex block is arranged inside the spring piece 112 to clamp the rod head 221 to prevent the rod head 221 from retreating. In addition, in this embodiment, an anti-drop protrusion 114 is arranged at one end of the cylinder 111 close to the spring piece 112.

[0055] Preferably, the clamping member 115 can be integrally formed with the spring sheet 112 by stamping and bending 113 , or can be integrated into one by welding, gluing, or the like.

[0056] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An invisible connection device, comprising a first connection mechanism (10) and a second connection mechanism (20), characterized in that ； The first connecting mechanism (10) comprises a first embedded component (11) and a movable insert (12) built into the first embedded component (11); the first embedded component (11) comprises a hollow cylinder (111) in the middle, and at least two spring pieces (112) connected to one end of the cylinder (111); each of the spring pieces (112) is arranged at intervals along the circumference of the cylinder (111); one end of the spring piece (112) is connected to the cylinder (111), and the other end extends in a direction away from the cylinder (111) and approaches each other; the ends of some or all of the spring pieces (112) are provided with a bend (113) away from the axis of the cylinder (111); and the inner side of the spring piece (112) and / or the cylinder (111) is provided with an anti-dropping protrusion (114) for preventing the movable insert (12) from sliding out of the first embedded component (11); The second connecting mechanism (20) comprises a second embedded part (21) and a connecting rod (22); one end of the connecting rod (22) is detachably connected to the second embedded part (21); the other end of the connecting rod (22) is provided with a rod head (221); and the spring sheet (112) is provided with a clamping part (115) clamped with the rod head (221).

2. The invisible connection device according to claim 1, characterized in that: The spring sheet (112) comprises two first spring sheets (112a) and two second spring sheets (112b), the two first spring sheets (112a) are arranged opposite to each other, the two second spring sheets (112b) are arranged opposite to each other, the height of the first spring sheet (112a) is lower than the height of the second spring sheet (112b), and the end of the second spring sheet (112b) is provided with a second bend (113b).

3. The invisible connection device according to claim 2, characterized in that: A first bend (113a) is provided at the end of the first elastic piece (112a).

4. The invisible connection device according to any one of claims 1 to 3, characterized in that: The rod head (221) is a structure with a large middle portion and gradually narrowed at both ends.

5. The invisible connection device according to claim 2, characterized in that: An adjustment groove (116) is provided at one end of the cylinder (111) away from the spring sheet (112).

6. The invisible connection device according to claim 1, characterized in that: The clamping member (115) is a protrusion on the inner side of the spring sheet (112).

7. The invisible connection device according to claim 1, characterized in that: The second embedded part (21) is provided with an expansion groove (211) along the axial direction.

8. The invisible connection device according to claim 1, characterized in that: The outer peripheral surface of the second embedded part (21) is provided with an external thread.

9. The invisible connection device according to claim 1, characterized in that: The connecting rod (22) is threadedly connected to the second embedded part (21), and a tightening groove (225) is provided on the rod head (221).

10. The invisible connection device according to claim 1, characterized in that: A buffer member (224) is sleeved on the middle portion of the connecting rod (22), and the diameter of the buffer member (224) is larger than the diameter of the rod head (221) and smaller than the inner diameter of the cylinder (111).

Images