Hidden connecting piece with double expansion positions

Abstract

The utility model relates to the field of panel furniture assembly and connection, and discloses a hidden connecting piece with double expansion positions, which comprises an expansion body and a connecting nail, the expansion body is axially provided with a through hole in a penetrating manner, the expansion body is provided with a middle expansion area and a tail expansion area, and the connecting nail is in interference fit with the inside of the expansion body. The expansion body is used for enabling the middle expansion area and the tail expansion area to be in an expansion state, the expansion body and the connecting nail form a connecting piece, the connecting piece is inserted into a plate punched with a flat hole, and then the plate punched with a side hole is inserted into the connecting piece to be tightly patted, so that the connecting nail is completely matched in the expansion body under the action of the plate. The middle expansion area and the tail expansion area are expanded in the two plates respectively, so that connection of the two plates is completed, the number of punched holes is reduced, professional tools are not needed, the punched holes cannot be seen from the periphery, the hole-free technology is achieved, the technology is simple, the installation speed is high, and the appearance is more attractive.

Description

Technical Field

[0001] The utility model relates to the field of panel furniture assembly connection, and specifically relates to a hidden connector with double expansion positions. Background Art

[0002] At present, the assembly of cabinets and the connection of furniture boards are mostly carried out by using ordinary three-in-one connectors; for ordinary three-in-one connectors, the embedded parts need to be knocked into the flat-hole board, then the three-in-one connecting rod is installed on the embedded parts, and then another board with a side hole is placed, and then locked with a three-in-one lock to form a connection. When connecting two board members, such connectors require complex accessories, complex tools, many holes. Three holes are opened, including a side hole for installing the lock, and this hole cannot be hidden, the operation is troublesome, the connection is not fast enough, the efficiency is not high, which affects the aesthetics, and multiple holes need to be drilled, affecting the assembly efficiency of the cabinet. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a hidden connector with double expansion positions to solve the deficiencies of the prior art.

[0004] The purpose of the utility model is achieved by the following technical solutions: A hidden connector with double expansion positions, including an expansion body and a connecting nail, the expansion body is axially penetrated with a through hole, the expansion body is provided with an intermediate expansion area and a tail expansion area, and the connecting nail is interference-fitted in the expansion body to make both the intermediate expansion area and the tail expansion area in an expanded state.

[0005] Further, at least one intermediate expansion piece is arranged along the circumferential direction of the expansion body in the intermediate expansion area, at least two tail expansion pieces are arranged along the circumferential direction of the expansion body in the tail expansion area, and one end of both the intermediate expansion piece and the tail expansion piece is connected to the expansion body, and the other end and the side form an expansion gap.

[0006] Further, the expansion body includes a first ring body and a second ring body, the first ring body and the second ring body are connected by a connecting piece, the intermediate expansion piece is located between the first ring body and the second ring body, and one end of the intermediate expansion piece is connected to the first ring body.

[0007] Further, the tail expansion piece is connected to one end of the second ring body away from the first ring body, and an expansion gap is formed between two adjacent tail expansion pieces.

[0008] Further, two support blocks are symmetrically fixed on the side wall of the connecting nail, a notch matching the support block is axially opened on the first ring body, the size of the expansion inner hole surrounded by the connecting piece and the intermediate expansion piece is smaller than the size of the notch, and the expansion inner hole and the notch are arc-transitionally connected.

[0009] Further, both ends of the support block along the axial direction of the connecting pin are arc surfaces.

[0010] Further, the connecting pin is movably adapted to the through hole, the diameter of the inner hole formed by the plurality of tail expansion pieces is smaller than the diameter of the connecting pin, and the inner hole of the tail expansion and the through hole are connected by an arc transition.

[0011] Further, a plurality of abutting teeth are fixed on the outer walls of the middle expansion piece, the connecting piece and the tail expansion piece.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The expansion body and the connecting pin form a connecting piece. Insert the connecting piece into the plate with a flat hole drilled, and then insert the plate with a side hole drilled onto the connecting piece and pat it tightly, so that the connecting pin is fully adapted to the expansion body under the action of the plate, and the middle expansion area and the tail expansion area expand in two plates respectively, thereby completing the connection of the two plates, reducing the number of drilled holes, not requiring professional tools, making the drilled holes invisible from all around, realizing a hole-free process, with a simple process, fast installation speed, and more beautiful appearance. Description of the Drawings

[0014] Figure 1 Structural schematic diagram of a hidden connecting piece with double expansion positions of the present utility model Figure 1 ;

[0015] Figure 2 Expansion state diagram of a hidden connecting piece with double expansion positions of the present utility model;

[0016] Figure 3 Top view of the expansion body of a hidden connecting piece with double expansion positions of the present utility model;

[0017] Figure 4 Structural schematic diagram of a hidden connecting piece with double expansion positions of the present utility model Figure 2 ;

[0018] Figure 5 Structural schematic diagram of the connecting pin of a hidden connecting piece with double expansion positions of the present utility model;

[0019] Figure 6 Installation step schematic diagram of a hidden connecting piece with double expansion positions of the present utility model;

[0020] In the figure, 1 - expansion body, 2 - connecting pin, 3 - through hole, 4 - middle expansion piece, 5 - tail expansion piece, 6 - first ring body, 7 - second ring body, 8 - connecting piece, 9 - support block, 10 - notch, 11 - abutting tooth. Detailed implementation manners

[0021] The technical solutions of the present utility model will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present utility model is not limited to the following description.

[0022] Such as Figure 1 、 Figure 2 、 Figure 4 And Figure 5As shown in the figure, a hidden connector with double expansion positions includes an expansion body 1 and a connecting nail 2. The expansion body 1 is axially penetrated with a through hole 3. The expansion body 1 is provided with an intermediate expansion area and a tail expansion area. The connecting nail 2 is press-fitted into the expansion body 1 to make both the intermediate expansion area and the tail expansion area in an expanded state. In the connection of two panels in existing furniture or cabinets, three holes need to be pre-drilled. One hole is drilled at each connection position of the two panels, and one hole is drilled on the side wall of one of the panels. The side wall hole is used to install a locking nut. For traditional expansion parts, one end is inserted into the hole of one of the panels, and then the screw rod is rotated to expand the expansion tube in the hole. Then, the screw rod is inserted into the hole of the other panel. Then, the locking nut on the side wall is tightened to lock the screw rod in the hole of the other panel. It can be seen that three holes need to be drilled for the connection of two panels. After the two panels are connected, there will be a hole for installing the locking nut on the side wall, which affects the appearance. Moreover, the entire connector requires three components to cooperate to complete the connection, the structure is relatively complex, and the connection operation is also more troublesome. At the same time, tools are required during the connection process. When the hidden connector is actually used, only installation holes need to be pre-opened on the two connected panels, that is, a total of two hole positions are opened. The connecting nail 2 is inserted into the expansion body 1 from the through hole 3. Before connection, the connecting nail 2 is not completely inserted into the expansion body 1. At this time, both ends of the expansion body 1 are inserted into the installation holes of the two panels respectively. Then, the two panels are pressed so that the two panels are in contact with each other. The panels will press the connecting nail 2 completely into the expansion body 1. At this time, the connecting nail 2 extrudes the intermediate expansion area and the tail expansion area outwards, so that both the intermediate expansion area and the tail expansion area generate expansion to form two expansion contact surfaces. The two expansion surfaces act on the installation holes of the two panels respectively, so as to connect the two panels together and have a strong connection strength. It is more convenient and fast to use. At the same time, the drilling on the side wall is omitted. After the two panels are connected, the hole positions are blocked from each other, and the connector is hidden inside the two panels, so that no drilling can be seen around after connection, and the appearance is more beautiful. Secondly, during operation, only the two ends of the connector need to be placed inside the two panels respectively and pressed. The operation is simple, the installation speed is faster, and the installation can be completed without using tools, which is more practical. Finally, the hidden connector has only two components as a whole, the structure is simpler, and the cost is lower. Specifically in implementation, true hole-free connection is achieved in the whole-house customized furniture. The hidden connector is made of nylon-coated iron material. This structure is simple and stable, has strong load-bearing capacity, and is not prone to problems, providing a reliable guarantee for the stability and durability of furniture; the use of hidden connectors brings great convenience to the production process of whole-house customized furniture.A small number of drill holes and simple position requirements only need an 8-mm drill bit, without the need to replace software or equipment, greatly improving production efficiency. Moreover, the installation operation is simple and easy, without the need for professional tools or complex steps. Just insert and gently press to quickly complete the installation, greatly improving the installation efficiency. After installation, the hidden connectors make no holes visible on the furniture surface, presenting a more beautiful appearance and enhancing the quality sense of the overall home decoration. The hidden connectors are not only suitable for furniture connection and installation, but also applicable to the installation and connection of various panels, with a wide range of uses and strong versatility. Compared with the existing connectors, the structure is simplified, consisting only of the expansion body 1 and the connecting nail 2, which not only reduces the cost of the connectors, simplifies the production process, and facilitates the installation operation, but also makes the manufacture of customized furniture for the whole house easy and efficient.

[0023] Further, as Figures 1 to 4As shown in the figure, at least one intermediate expansion piece 4 is provided along the circumferential direction of the expansion body 1 in the intermediate expansion area, and at least two tail expansion pieces 5 are provided along the circumferential direction of the expansion body 1 in the tail expansion area. One end of both the intermediate expansion piece 4 and the tail expansion piece 5 is connected to the expansion body 1, and the other end and the side form an expansion gap. The expansion body 1 includes a first ring body 6 and a second ring body 7. The first ring body 6 and the second ring body 7 are connected by a connecting piece 8. The intermediate expansion piece 4 is located between the first ring body 6 and the second ring body 7. One end of the intermediate expansion piece 4 is connected to the first ring body 6. The tail expansion piece 5 is connected to one end of the second ring body 7 far from the first ring body 6. An expansion gap is formed between two adjacent tail expansion pieces 5. Two support blocks 9 are symmetrically fixed on the side wall of the connecting pin 2. The first ring body 6 is axially provided with a notch 10 matching the support block 9. The size of the expansion inner hole formed by the connecting piece 8 and the intermediate expansion piece 4 is smaller than the size of the notch 10. The expansion inner hole and the notch 10 are arc-connected. The connecting pin 2 is movably adapted to the through hole 3. The diameter of the tail expansion inner hole formed by multiple tail expansion pieces 5 is smaller than the diameter of the connecting pin 2. The tail expansion inner hole and the through hole 3 are arc-connected. The notch 10 communicates with the through hole 3. When the connecting pin 2 is inserted from the through hole 3, the support block 9 passes through the notch 10. The setting of the notch 10 enables the connecting pin 2 to be smoothly inserted into the expansion body 1. When the expansion body 1 does not expand, the support block 9 is located in the notch 10. At this time, there is a certain distance between the head of the connecting pin 2 and the expansion body 1, and the tail of the connecting pin 2 does not move into the tail expansion inner hole. Then, both ends of the expansion body 1 are respectively inserted into the mounting holes of two plate members. At this time, both ends of the connecting member are respectively located in the holes of the two plate members, and there is a certain distance between the two plate members. Then, the two plate members are pushed to contact. At this time, the plate members will push the head of the connecting pin 2 to contact the expansion body 1, and the support block 9 will move out of the notch 10 and move into the expansion inner hole. Since the size of the expansion inner hole is smaller than the size of the notch 10, the support block 9 will extrude the intermediate expansion piece 4 to deform outward to generate an expansion surface, so that the intermediate expansion piece 4 expands in the mounting hole of one plate member. At the same time, the tail of the connecting pin 2 moves into the tail expansion inner hole. Since the diameter of the tail expansion inner hole is smaller than the diameter of the connecting pin 2, the connecting pin 2 will extrude the tail expansion piece 5 to deform outward to generate an expansion surface, so that the tail expansion piece 5 expands in the mounting hole of the other plate member, thereby quickly connecting the two plate members together. At the same time, the plug-in connection method is adopted, which has a faster installation efficiency compared with the threaded expansion method. Secondly, after the two plate members are connected, the connecting member is completely hidden, and at the same time, the hole positions are blocked, so that the entire furniture or cabinet is installed in a holeless process, with high connection efficiency, low cost, and more beautiful appearance.

[0024] Further, as Figure 4 shown, both ends of the support block 9 along the axial direction of the connecting pin 2 are arc surfaces. The arc surfaces can conduct the force, enabling the connecting pin 2 to smoothly drive the support block 9 to extrude the intermediate expansion piece 4 and move it into the expansion inner hole, and at the same time, it is also convenient to take out the connecting pin 2.

[0025] Furthermore, as Figure 3 shown, a number of abutting teeth 11 are fixed to the outer walls of the middle expansion piece 4, the connecting piece 8, and the tail expansion piece 5. The connection strength between the expansion body 1 and the plate member is enhanced by the abutting teeth 11, making the connection between the plate members not easily fall off.

Claims

1. A hidden connector with two expansion positions, characterized in that, It includes an expansion body (1) and a connecting nail (2). The expansion body (1) is axially penetrated with a through hole (3). The expansion body (1) is provided with an intermediate expansion area and a tail expansion area. The connecting nail (2) is interference-fitted in the expansion body (1) to keep the intermediate expansion area and the tail expansion area in an expanded state. At least one intermediate expansion piece (4) is provided in the circumferential direction of the expansion body (1) in the intermediate expansion area. At least two tail expansion pieces (5) are provided in the circumferential direction of the expansion body (1) in the tail expansion area. One end of each of the intermediate expansion piece (4) and the tail expansion piece (5) is connected to the expansion body (1), and the other end and the side form an expansion gap. The expansion body (1) includes a first ring body (6) and a second ring body (7). The first ring body (6) and the second ring body (7) are connected by a connecting piece (8). The intermediate expansion piece (4) is located between the first ring body (6) and the second ring body (7), and one end of the intermediate expansion piece (4) is connected to the first ring body (6). The tail expansion piece (5) is connected to one end of the second ring body (7) away from the first ring body (6), and an expansion gap is formed between two adjacent tail expansion pieces (5). Two support blocks (9) are symmetrically fixed on the side wall of the connecting nail (2). The first ring body (6) is axially provided with a notch (10) matching the support block (9). The size of the expansion inner hole formed by the connecting piece (8) and the intermediate expansion piece (4) is smaller than the size of the notch (10), and the expansion inner hole and the notch (10) are connected by an arc transition.

2. The hidden connector with double expansion positions according to claim 1, characterized in that, Both ends of the support block (9) in the axial direction of the connecting nail (2) are arc surfaces.

3. A hidden connector having a double expansion position according to claim 1, characterized in that, The connecting nail (2) is movably fitted in the through hole (3). The diameter of the tail expansion inner hole formed by a plurality of tail expansion pieces (5) is smaller than the diameter of the connecting nail (2), and the tail expansion inner hole and the through hole (3) are connected by an arc transition.

4. A hidden connector having a double expansion position according to claim 1, characterized in that, A number of abutting teeth (11) are fixed on the outer walls of the intermediate expansion piece (4), the connecting piece (8), and the tail expansion piece (5).

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