Connecting nail

Abstract

The utility model discloses a connecting nail, which belongs to the field of panel furniture connecting pieces, is used for connecting plates, and solves the technical problem that an expansion bolt is small in expansion amplitude. The stud comprises a stud body and an expansion joint, the stud point of the stud body is a cylindrical head, the stud head of the stud body is a countersunk head, the stud body of the stud body is a polished rod, the section, close to the countersunk head, of the polished rod is installed in the expansion joint in a sliding mode, and when the polished rod slides towards one side of the cylindrical head along the expansion joint, the countersunk head enables the expansion joint to be opened.

Description

Technical Field

[0001] This utility model belongs to the field of panel furniture connectors, and specifically relates to a connecting nail for connecting panels. Background Technology

[0002] In panel furniture, the connection between panels is generally accomplished using three components: an eccentric fitting, bolts, and expansion bolts. In practice, the expansion bolt is pre-embedded in one panel, and the bolt is tightened until it is secured. Next, the eccentric fitting is placed in another panel, and the bolt passes through the other panel and is inserted into the eccentric fitting. Finally, the eccentric fitting is tightened to lock the bolt. To achieve faster installation of bolts and expansion bolts, an improvement was developed: the expansion bolts are threaded onto the bolts to form a single component. This reduces the number of components from three to two. The step of tightening the bolts to the expansion bolts is eliminated; only the expansion bolt portion of this component needs to be installed in one panel, and the bolt portion is locked to the eccentric fitting in the other panel, greatly simplifying the installation process. However, this improvement still relies on the threaded connection between the bolt and the expansion bolt for expansion and fixation. This still cannot overcome the shortcomings of the expansion bolt's relatively small expansion range and weak tightening force, leading to problems such as the component easily detaching from one panel and the two panels not being tightly connected. Utility Model Content

[0003] The purpose of this invention is to provide a connecting nail that improves the expansion structure of the expansion bolt, enhances the fastening force, and enables a tight connection between the plates.

[0004] The connecting pin includes a stud and an expansion joint. The stud has a cylindrical tip, a smooth shaft, and a countersunk head. A section of the smooth shaft near the countersunk head is slidably installed inside the expansion joint. When the smooth shaft slides along the expansion joint toward the cylindrical tip, the countersunk head causes the expansion joint to open.

[0005] The expansion joint is formed by longitudinally connecting a sleeve and a connector. The smooth rod is slidably installed through the sleeve and the connector. The outer diameter of the connector is larger than the outer diameter of the sleeve, and the inner diameter of the sleeve is equal to the inner diameter of the connector.

[0006] The optical rod is provided with a shoulder step, and the outer edge of the shoulder step is provided with a backstop ring, and the sleeve abuts against the backstop ring.

[0007] The connector has an external threaded surface and a slot, which passes through the external threaded surface longitudinally.

[0008] The slot extends into the sleeve.

[0009] The inner diameter of the sleeve and connector is larger than the diameter of the cylindrical head and the outer diameter of the anti-reverse ring.

[0010] The guide rod has a tapered step near the countersunk head, and the joint has a tapered groove that matches the tapered step, with the tapered groove abutting against the tapered step.

[0011] The countersunk head is shaped like a frustum, and its upper end face is integrally formed with the smooth rod. The upper end face of the countersunk head corresponds to the outer end face of the joint, and the diameter of the lower end face of the countersunk head is larger than the inner diameter of the sleeve and the joint.

[0012] The sleeve and connector are integrally formed.

[0013] The expansion joint is made of nylon material.

[0014] The beneficial effects of this utility model are as follows: When the above-mentioned connecting nail is used, the joint of the expansion joint is installed on one plate, and the cylindrical head of the stud is locked to the eccentric part of another plate. Since the nail body is a smooth rod, which can slide along the expansion joint, the rotation of the eccentric part pulls the smooth rod relative to the expansion joint to generate displacement. At this time, the joint of the expansion joint slides obliquely along the side of the countersunk head and gradually opens. When the lower end face of the countersunk head extends into the joint, the opening degree of the joint is the maximum, and the joint is pressed against the circumferential surface of one plate, forming an interference fit. The fastening force obtained by this expansion structure is sufficient to tightly connect the plates. Attached Figure Description

[0015] Figure 1 This is a front view of the connecting nail of this utility model;

[0016] Figure 2 This is a left view of the connecting nail of this utility model;

[0017] Figure 3 for Figure 2 AA section view;

[0018] Figure 4 This is a front view of the stud of the connecting nail of this utility model. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] like Figure 1 , 2 As shown in Figures 3 and 4, the connecting pin includes a stud A and an expansion joint B. The stud A has a cylindrical head 1 at its tip, a smooth shaft 2 on its body, and a countersunk head 3 at its head. The smooth shaft 2 is made of high-strength steel, and the expansion joint B is made of high-strength nylon.

[0021] The smooth rod 2 is integrally formed and has a shoulder step 4. The outer edge of the shoulder step 4 has a backstop ring 5. The expansion joint B is formed by longitudinally connecting the sleeve 6 and the joint 7, and the sleeve 6 and the joint 7 are integrally formed. The outer diameter of the joint 7 is larger than the outer diameter of the sleeve 6, and the inner diameter of the sleeve 6 is equal to the inner diameter of the joint 7. The joint 7 has an external thread surface 8 and a slot 9. The slot 9 passes through the external thread surface 8 longitudinally and extends into a part of the sleeve 6.

[0022] When using the above-mentioned connecting pins, the assembly of the stud A and expansion joint B is first completed by pre-assembly: because the inner diameter of the sleeve 6 and the joint 7 is larger than the diameter of the cylindrical head 1 and the outer diameter of the anti-reverse ring 5, the joint 7 and the sleeve 6 pass through the cylindrical head 1 and the anti-reverse ring 5 in sequence, and are fitted onto the smooth rod 2 between the countersunk head 3 and the shoulder step 4, so that the smooth rod 2 can slide relative to the joint 7 and the sleeve 6. At the same time, the outer end face of the sleeve 6 abuts against the anti-reverse ring 5. Since the smooth rod 2 is provided with a tapered step 10 near the countersunk head 3, and the joint 7 is provided with a tapered groove 11 that matches the tapered step 10, the tapered groove 11 abuts against the tapered step 10. Thus, the expansion joint B completes the axial limiting pre-assembly.

[0023] Next, insert connector 7 into the inner hole of one plate, insert the eccentric part into the inner hole of another plate, and connect the cylindrical head 1 to the eccentric part. Because the countersunk head 3 is frustum-shaped, the upper end face 3a of the countersunk head 3 is integrally formed with the smooth rod 2. The upper end face 3a of the countersunk head 3 corresponds to the outer end face of connector 7. The diameter of the lower end face 3b of the countersunk head 3 is larger than the inner diameter of the sleeve 6 and connector 7. Therefore, by turning the eccentric part, the rotation of the eccentric part is used to pull the smooth rod 2 relative to the expansion connector B to generate displacement. At this time, connector 7 slides obliquely along the side 3c of the countersunk head 3 and gradually opens along the slot 9. When the lower end face 3b of the countersunk head 3 extends into connector 7, the outer edge of the countersunk head 3 abuts against the inner cavity position corresponding to the external thread surface 8, so that connector 7 expands evenly and fully opens. Connector 7 is pressed against the circumferential surface of the inner hole of one plate to form an interference lock, thereby enabling connector 7 to obtain the maximum fastening force to tightly connect the two plates.

Claims

1. A staple characterized by, The expansion joint (B) is formed by the sleeve (6) and the joint (7) longitudinally communicating, the light pole (2) is slidably installed through the sleeve (6) and the joint (7), the outer diameter of the joint (7) is larger than that of the sleeve (6), and the inner diameter of the sleeve (6) is equal to that of the joint (7).

2. The staple of Claim 1, wherein, The shoulder step (4) is arranged on the light pole (2), the outer edge of the shoulder step (4) is provided with the retreat stop ring (5), and the sleeve (6) abuts against the retreat stop ring (5).

3. The staple of Claim 2, wherein, The joint (7) is provided with the external thread surface (8), and the joint (7) is provided with the one-groove (9) penetrating through the external thread surface (8) in the longitudinal direction.

4. The staple of Claim 2, wherein, The one-groove (9) extends into the sleeve (6).

5. The staple of Claim 4, wherein, The inner diameters of the sleeve (6) and the joint (7) are larger than the diameter of the cylindrical head (1) and the outer diameter of the retreat stop ring (5).

6. The staple of Claim 3, wherein, The taper step (10) is arranged on the light pole (2) close to the countersunk head (3), the taper groove (11) is arranged in the joint (7) and matched with the taper step (10), and the taper groove (11) abuts against the taper step (10).

7. The staple of Claim 3, wherein, The countersunk head (3) is in the shape of a circular truncated cone, the upper end surface (3a) of the countersunk head (3) is integrally formed with the light pole (2), the upper end surface (3a) of the countersunk head (3) corresponds to the outer end surface of the joint (7), and the diameter of the lower end surface (3b) of the countersunk head (3) is larger than the inner diameters of the sleeve (6) and the joint (7).

8. The staple of Claims 2 or 6, wherein, The sleeve (6) and the joint (7) are integrally formed.

9. The staple of Claims 2 or 6, wherein, The expansion joint (B) is made of nylon material.

10. The staple of Claim 9, wherein, ​

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