Non-slip combination screw with replaceable head

Abstract

A replaceable head lock-lock combination screw, characterized in that it comprises: a nut, a spring washer, a metal washer, and a stud; the center of the bottom of the nut is integrally formed with the top of the stud; the spring washer and the metal washer are movably fitted onto the stud body; the bottom of the stud body is provided with threads; a sleeve is fitted onto the bottom of the stud; a tapered socket is provided at the center of the top of the nut, and a tapered plug is movably inserted into the inner cavity of the tapered socket. This utility model of a replaceable head lock-lock combination screw, through the tapered socket on the nut, the matching tapered plug, and the hexagonal Torx socket on the tapered plug, allows for the separation of the screw head from the nut, achieving the purpose of replaceable screw head.

Description

Technical Field

[0001] This utility model relates to the technical field of combination screws, and in particular to a non-detachable combination screw with replaceable screw heads. Background Technology

[0002] Combination screws are parts used for connecting and fastening household appliances, etc. The national standard number for these parts is GB9074, and they are made of either iron or stainless steel. They are widely used in electrical, power, machinery, electronics, household appliances, furniture, and shipbuilding industries.

[0003] Currently, the screw head and nut of existing combination screws are molded as a single piece. The existing screw head is generally hexagonal, which is prone to stripping after long-term use. Since the screw head cannot be replaced, the combination screw is not durable. In order to make the combination screw more durable, a combination screw with a replaceable screw head is designed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a non-detachable combination screw with replaceable screw heads.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A replaceable screw head capless combination screw, characterized in that it comprises: a nut, a spring washer, a metal washer, and a stud; the center of the bottom of the nut is integrally formed with the top of the stud, the spring washer and the metal washer are movably fitted onto the stud body, the bottom of the stud body is provided with threads, and a sleeve is fitted onto the bottom of the stud; a tapered socket is provided at the center of the top of the nut, a tapered plug is movably inserted into the inner cavity of the tapered socket, a hexagonal pendant is provided at the center of the top of the tapered plug, a magnet plate is provided at the bottom of the inner cavity of the tapered socket, and the tapered plug is made of metal; auxiliary handles are provided on the left and right sides of the nut.

[0007] In one embodiment, the inner wall of the tapered socket is provided with insertion grooves at equal intervals around the circumference, and a limiting groove is provided through the bottom of the insertion grooves. The insertion grooves extend from the tapered socket to the center of its inner cavity near the bottom.

[0008] In one embodiment, the tapered plug has protrusions at equal intervals around its circumference near the bottom of its center. The shape and size of the top view of the protrusions match the shape and size of the top view of the insertion slot, and the length and width of the side of the limiting slot match the length and width of the side of the protrusions.

[0009] In one embodiment, a circular hole is provided at the center of the top of the metal washer, the diameter of which is adapted to the diameter of the stud in top view, and arc-shaped openings are provided at equal intervals around the circumference of the metal washer.

[0010] In one embodiment, grooves are provided on the left and right sides of the nut body, and the auxiliary handle is disposed in the grooves. The auxiliary handle includes a spring hinge and a rotating handle.

[0011] In one embodiment, the length and width of the rotating handle side of the auxiliary handle are adapted to the length and width of the nut groove side, and the spring hinge of the auxiliary handle is disposed at the top of the groove, and the length and width of the top view of the spring hinge match the length and width of the top view of the groove.

[0012] In one embodiment, the distance between the arc-shaped opening and the circular hole is adapted to the diameter of the top view of the spring washer, and the spring washer is located on top of the metal washer.

[0013] In one embodiment, the surface of the stud is coated with a layer of chemical adhesive.

[0014] Compared with the prior art, the present invention has at least the following advantages:

[0015] This utility model discloses a replaceable screw head non-removable combination screw. Through a tapered socket on the nut, a matching tapered plug, and a hexagonal spigot on the tapered plug, the screw head can be separated from the nut. Furthermore, the tapered socket has a insertion groove and a limiting groove, which, combined with the protrusion on the tapered plug, allows the tapered plug to be inserted into the socket and locked in place, preventing it from falling out of the slot. The limiting groove is positioned in the same direction as the thread rotation, thus allowing the stud to rotate and connect to the threaded hole, achieving the purpose of replaceable screw heads. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0018] Figure 2 This is a perspective view of the overall front structure of the present invention;

[0019] Figure 3 This is a top view schematic diagram of the overall structure of this utility model;

[0020] Figure 4 This is a top view of the structure of the metal washer of this utility model;

[0021] Figure 5 This is a schematic diagram of the side structure of the front insertion slot of this utility model.

[0022] In the diagram: 1. Nut; 11. Tapered plug; 111. Protruding post; 112. Hexagonal pentagonal socket; 12. Tapered socket; 121. Magnet plate; 122. Insertion groove; 123. Limiting groove; 13. Auxiliary handle; 2. Spring washer; 3. Metal washer; 31. Arc-shaped opening; 32. Round hole; 4. Stud; 41. Thread; 5. Sleeve. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0024] like Figure 1-5 As shown, a replaceable screw head capless combination screw includes: a nut 1, a spring washer 2, a metal washer 3, and a stud 4; the center of the bottom of the nut 1 is integrally formed with the top of the stud 4; the spring washer 2 and the metal washer 3 are movably sleeved on the stud body of the stud 4; the bottom of the stud body of the stud 4 is provided with a thread 41; a sleeve 5 is sleeved on the bottom of the stud 4; a conical socket 12 is provided at the center of the top of the nut 1; a conical plug 11 is movably inserted into the inner cavity of the conical socket 12; a hexagonal pendant 112 is provided at the center of the top of the conical plug 11; a magnet plate 121 is provided at the bottom of the inner cavity of the conical socket 12; the conical plug 11 is made of metal; auxiliary handles 13 are provided on the left and right sides of the nut 1. It should be noted that the thread 41 is designed clockwise, and the limiting groove 123 is also provided clockwise at the bottom of the insertion groove 122;

[0025] When needed, the operator inserts the conical plug 11 into the conical socket 12, aligning each protrusion 111 with each insertion slot 122. Once inserted, the protrusion 111 moves to the bottom of the insertion slot 122, and the magnetic plate 121 attracts the conical plug 11. A hexagonal screwdriver is then inserted into the hexagonal socket 112, causing the conical plug 11 to rotate clockwise. The protrusion 111 rotates clockwise into the limiting groove 123 and is locked, allowing the entire nut 1 to rotate clockwise, and the stud 4 to rotate clockwise as well, thus enabling threaded connection with the threaded hole. When the screw head needs to be replaced, simply rotate the screwdriver in the opposite direction to move the protrusions 111 around the conical plug 11 from the limiting groove 123 into the insertion slot 122. Then, the screwdriver's suction can be used to pull it out of the conical socket 12 for replacement.

[0026] like Figure 1-5 As shown in one embodiment, the inner wall of the conical socket 12 is provided with insertion grooves 122 at equal intervals around the circumference. A limiting groove 123 is provided through the bottom of the insertion grooves 122, and the insertion grooves 122 extend from the conical socket 12 to the center of its inner cavity near the bottom. The top of the conical plug 11 is provided with protrusions 111 at equal intervals around the circumference. The shape and size of the top view of the protrusions 111 match the shape and size of the top view of the insertion grooves 122, and the length and width of the side of the limiting groove 123 match the length and width of the side of the protrusions 111. It should be noted that the depth of the limiting groove 123 corresponds to the position of the protrusions 111 on the conical plug 11.

[0027] like Figure 1-5 As shown in one embodiment, a circular hole 32 is provided at the center of the top of the metal washer 3. The diameter of the circular hole 32 is adapted to the diameter of the top view of the stud 4. Arc-shaped openings 31 are provided at equal intervals around the circumference of the metal washer 3. The distance between the arc-shaped openings 31 and the circular hole 32 is adapted to the diameter of the top view of the spring washer 2. The spring washer 2 is located at the top of the metal washer 3. It should be noted that this design allows the central spring washer to deform and engage with the arc-shaped opening 31 of the metal washer 3 after the screw is threaded, thereby making the connection tighter and preventing loosening.

[0028] like Figure 1-5As shown in one embodiment, the nut 1 has grooves on both sides of its body, and an auxiliary handle 13 is disposed in these grooves. The auxiliary handle 13 includes a spring hinge and a rotating handle. The length and width of the rotating handle side of the auxiliary handle 13 are adapted to the length and width of the groove side of the nut 1. The spring hinge of the auxiliary handle 13 is disposed at the top of the groove, and the length and width of the top view of the spring hinge match the length and width of the top view of the groove. It should be noted that this design allows workers to directly rotate the nut using the auxiliary handle 13 when a screwdriver is unavailable or inconvenient, thereby achieving screw connection.

[0029] like Figure 1-5 As shown in one embodiment, the surface of the stud 4 is coated with a layer of chemical adhesive. It should be noted that this enhances its ability to loosen after the threaded connection is made.

[0030] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A non-removable combination screw with replaceable screw heads, characterized in that, include: Nut (1), spring washer (2), metal washer (3) and stud (4); the center of the bottom of the nut (1) is integrally formed with the top of the stud (4), the spring washer (2) and the metal washer (3) are movably sleeved on the stud (4), the bottom of the stud (4) is provided with a thread (41), and the bottom of the stud (4) is sleeved with a sleeve (5); a conical socket (12) is provided in the center of the top of the nut (1), a conical plug (11) is movably inserted into the inner cavity of the conical socket (12), a hexagonal pendant (112) is provided in the center of the top of the conical plug (11), a magnet plate (121) is provided at the bottom of the inner cavity of the conical socket (12), and the conical plug (11) is made of metal; auxiliary handles (13) are provided on the left and right sides of the nut (1).

2. The replaceable screw head non-removable combination screw according to claim 1, characterized in that, The inner wall of the conical socket (12) is provided with insertion grooves (122) at equal intervals around the circumference. A limiting groove (123) is provided through the bottom of the insertion groove (122). The insertion groove (122) extends from the conical socket (12) to the center of its inner cavity near the bottom.

3. A replaceable screw head non-removable combination screw according to claim 2, characterized in that, The conical plug (11) has protrusions (111) arranged at equal intervals around the circumference near the bottom of the center. The shape and size of the top view of the protrusions (111) match the shape and size of the top view of the plug groove (122). The length and width of the side of the limiting groove (123) match the length and width of the side of the protrusions (111).

4. A replaceable screw head non-removable combination screw according to claim 1, characterized in that, The metal washer (3) has a circular hole (32) at the center of its top. The diameter of the circular hole (32) is matched with the diameter of the stud (4) when viewed from above. The metal washer (3) has arc-shaped openings (31) at equal intervals around its circumference.

5. A replaceable screw head non-removable combination screw according to claim 1, characterized in that, The nut (1) has grooves on the left and right sides of the nut body, and the auxiliary handle (13) is set in the groove. The auxiliary handle (13) includes a spring hinge and a rotating handle.

6. A replaceable screw head non-removable combination screw according to claim 5, characterized in that, The length and width of the rotating handle side of the auxiliary handle (13) are adapted to the length and width of the groove side of the nut (1). The spring hinge of the auxiliary handle (13) is set at the top of the groove, and the length and width of the top view of the spring hinge match the length and width of the top view of the groove.

7. A replaceable screw head non-removable combination screw according to claim 4, characterized in that, The distance between the arc-shaped opening (31) and the circular hole (32) is adapted to the diameter of the top view of the spring washer (2), and the spring washer (2) is located on top of the metal washer (3).

8. A replaceable screw head non-removable combination screw according to claim 5, characterized in that, The surface of the stud (4) is coated with a layer of chemical adhesive.

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