Invisible conical head connecting bolt

Abstract

The utility model relates to an invisible conical head connecting bolt which comprises a bolt body, a connecting threaded pipe and a torsion bar, a connecting rod is arranged in the middle of the bolt body, a torsion hole is formed in the middle of the connecting rod, and the torsion bar is arranged in the torsion hole; a conical head inserting rod is arranged at one end of the connecting rod, a connecting screw rod is arranged at the other end of the connecting rod, and a connecting threaded pipe is connected to the connecting screw rod in a threaded mode. The tool is simple in structure and ingenious in design, two workpieces are connected through the conical head inserting rod and the connecting screw rod, meanwhile, the outer surfaces of the workpieces are not damaged, and the surfaces of the workpieces are kept complete and attractive; and the torsion bar is utilized to keep the bolt body not rotating, so that firm connection is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of threaded connection and relates to a hidden tapered head connection bolt. Background Art

[0002] Threaded connections are used in various fields and also involve the furniture and home improvement industries; when manufacturing furniture, for the legs of some furniture (such as tables and chairs), long nails are directly used to nail the legs. After a long time of use, the legs are prone to falling off, and the nails will damage the upper surface of the tabletop or chair surface, affecting the appearance; and when the legs are damaged and need to be replaced, during the disassembly process, it is easy to cause greater damage to the tabletop or chair surface. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art, solve the problem of the adverse effects caused by using nails to connect the legs of tables and chairs to the tabletop or chair surface, and provide a hidden tapered head connection bolt.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] The hidden tapered head connection bolt includes a bolt body, a connecting threaded tube and a torsion rod. A connecting rod is arranged in the middle of the bolt body, a torsion hole is opened in the middle of the connecting rod, and a torsion rod is arranged in the torsion hole; one end of the connecting rod is provided with a tapered head insertion rod, the other end of the connecting rod is provided with a connecting screw, and a connecting threaded tube is screwed on the connecting screw.

[0006] Preferably, a threaded hole is opened in the middle of the connecting threaded tube, and a relief hole is opened on the connecting threaded tube at one end of the threaded hole.

[0007] Preferably, a positioning block is arranged at one end of the connecting threaded tube away from the relief hole.

[0008] Preferably, an anti - detachment rod is arranged at one end of the torsion rod.

[0009] Preferably, an external thread is arranged on the outer side of the tapered head insertion rod.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The utility model has a simple structure and ingenious design. Through the tapered head insertion rod and the connecting screw, while the two workpieces are connected, the outer surface of the workpiece is not damaged, and the integrity and beauty of the workpiece surface are maintained; by using the torsion rod, the bolt body can be kept from rotating, which is convenient for firm connection. Brief Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the use state of the utility model.

[0013] Figure 2 Schematic diagram of the bolt body structure of the present utility model.

[0014] Figure 3 Schematic diagram of the overall structure of the present utility model.

[0015] In the figure: 1, bolt body; 2, threaded tube; 3, torsion bar; 4, connecting rod; 5, torsion hole; 6, tapered head plug rod; 7, connecting screw; 8, threaded hole; 9, relief hole; 10, positioning block; 11, anti - detachment rod; 12, external thread; 13, first workpiece; 14, second workpiece. Specific implementation mode

[0016] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] As Figures 1 - 3 shown, an invisible tapered - head connecting bolt includes a bolt body 1, a threaded tube 2 and a torsion bar 3. A connecting rod 4 is arranged in the middle of the bolt body 1. A torsion hole 5 is opened in the middle of the connecting rod 4, and a torsion bar 3 is arranged in the torsion hole 5. When the staff uses the bolt body 1 for connection, a torque wrench can be used to keep the position of the bolt body 1 fixed.

[0018] One end of the connecting rod 4 is provided with a tapered head plug rod 6, and the tapered head plug rod 6 can be inserted into the panel workpiece to avoid showing the head, playing an invisible role.

[0019] The other end of the connecting rod 4 is provided with a connecting screw 7, and a threaded tube 2 is screwed on the connecting screw 7. The threaded tube 2 can be embedded in the second workpiece 14. Then, the staff rotates the second workpiece 14 so that the threaded tube 2 is screwed on the connecting screw 7. During the connection process, the staff can hold the torsion bar 3 to keep the bolt body 1 from rotating, so as to facilitate fastening in place and ensure a firm connection. After the connecting screw 7 is connected to the threaded tube 2, the first workpiece 13 and the second workpiece 14 are tightly connected together.

[0020] Furthermore, a threaded hole 8 is opened in the middle of the threaded tube 2, and a relief hole 9 is opened on the threaded tube 2 at one end of the threaded hole 8. When the connecting screw 7 is screwed into the threaded hole 8, the relief hole 9 can prevent the non - threaded part of the connecting screw 7 from contacting the threaded hole 7, and will not affect the threaded hole 8, so that the connecting screw 7 is connected in place.

[0021] Furthermore, a positioning block 10 is provided at one end of the threaded tube 2 away from the clearance hole 9 . The positioning block 10 prevents the threaded tube 2 from rotating after being embedded in the second workpiece 14 , thereby preventing the threaded tube 2 from rotating synchronously with the connecting screw 7 .

[0022] Furthermore, an anti-dropout rod 11 is provided at one end of the torsion rod 3 , and the anti-dropout rod 11 prevents the torsion rod 3 from being easily dropped out of the torsion hole 5 during use.

[0023] Furthermore, an external thread 12 is provided on the outer side of the cone head insert rod 6, and the external thread 12 enables the cone head insert rod 6 to be screwed into the first workpiece 13 without external hammering.

[0024] Working principle: When the utility model is used, the cone head plug rod 6 is first inserted into the first workpiece 13, and then the threaded tube 2 is embedded in the second workpiece 14. The staff holds the torsion bar 3 to keep the connecting screw 7 from rotating. Then, the threaded tube 2 is screwed onto the connecting screw 7 to complete the connection between the first workpiece 13 and the second workpiece 14. After the connection is completed, the upper surface of the first workpiece 13 will not be affected, and the upper surface of the first workpiece 13 is kept neat and beautiful. And if the second workpiece is damaged, the second workpiece 14 can be directly removed, and after the threaded tube 2 is taken out, a new second workpiece 14 can be embedded to reconnect.

[0025] By providing an external thread on the cone head insert rod 6 , the cone head insert rod 6 can be screwed into the first workpiece 13 more quickly (similar to a screw).

[0026] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An invisible tapered head connecting bolt, comprising a bolt body (1), a threaded tube (2) and a torsion bar (3), characterized in that: A connecting rod (4) is arranged in the middle of the bolt body (1), a torque hole (5) is opened in the middle of the connecting rod (4), and a torque rod (3) is arranged in the torque hole (5); a cone-head insert rod (6) is arranged at one end of the connecting rod (4), and a connecting screw rod (7) is arranged at the other end of the connecting rod (4), and a threaded tube (2) is screwed onto the connecting screw rod (7).

2. The invisible cone head connecting bolt according to claim 1, characterized in that: A threaded hole (8) is provided in the middle of the threaded tube (2), and a clearance hole (9) is provided on the threaded tube (2) at one end of the threaded hole (8).

3. The invisible cone head connecting bolt according to claim 1, characterized in that: A positioning block (10) is provided at one end of the threaded tube (2) away from the clearance hole (9).

4. The invisible cone-head connecting bolt according to claim 1, characterized in that: An anti-drop rod (11) is provided at one end of the torsion rod (3).

5. The invisible cone head connecting bolt according to claim 1, characterized in that: The outer side of the cone head plug rod (6) is provided with an external thread (12).

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