Anti-loose hinge structure of scissors tool and scissors

Abstract

This utility model discloses an anti-loosening hinge structure for scissors and scissors in general. The anti-loosening hinge structure includes: a hinge bolt and a tightening bolt. The hinge bolt has a smooth section in the middle and a threaded section at the end. The outer wall of the threaded section has external threads, and the inner wall near the end of the threaded section has a conical surface. The inner wall inside the conical surface has internal threads. At least two notches are provided on the side wall at the end of the threaded section. The tightening bolt has a conical section in the middle and a stud section at the end. The small-diameter end of the conical section is connected to the stud section. The stud section of the tightening bolt can be screwed into the threaded section of the hinge bolt. As it is screwed in, the conical section of the tightening bolt can cooperate with the conical surface at the end of the threaded section to apply an outward expansion force to the end of the threaded section. Because there are notches at the end of the threaded section, the end of the threaded section can expand outward under the action of the outward expansion force, thereby preventing the hinge bolt from loosening by tightening it in the threaded hole.

Description

Technical Field

[0001] This utility model relates to the field of scissor tools, specifically to an anti-loosening hinge structure for scissor tools and scissors. Background Technology

[0002] Scissors are made of two blades hinged together. The two blades are usually hinged by a bolt that passes through the hinge hole on one blade and screws into the threaded hole on the other blade. The bolt mentioned above is prone to loosening due to vibration during the use of scissors, which will greatly reduce the service life of scissors and the comfort of use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an anti-loosening hinge structure for scissors and scissors using the structure.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: an anti-loosening hinge structure for scissors, comprising: a hinge bolt, characterized in that: it further comprises: an expansion bolt, the middle part of the hinge bolt is a smooth rod section and the tail is a threaded tube section, the outer wall of the threaded tube section is provided with external threads, the hinge bolt can be threadedly connected to a threaded hole on a blade of the scissors through the external threads on the threaded tube section, the inner wall of the threaded tube section near its tail is provided with a conical surface whose diameter gradually decreases from the outside to the inside, the inner wall of the inner side of the conical surface is provided with internal threads, and at least two threads are formed on the tail side wall of the threaded tube section surrounding the circumference of the threaded tube section. The expansion bolt is arranged along the axial direction of the threaded tube section, with a long, narrow notch. The middle part of the expansion bolt is a conical section, and the tail part is a stud section with external threads. The small-diameter end of the conical section is connected to the stud section. The stud section of the expansion bolt can be screwed into the internal thread of the threaded tube section of the hinge bolt. As it is screwed in, the conical section of the expansion bolt can cooperate with the conical surface on the tail end of the threaded tube section to apply an outward expansion force to the tail end of the threaded tube section. Because there is a notch on the tail end of the threaded tube section, the tail end of the threaded tube section can expand outward under the action of the outward expansion force, so that the tail end of the threaded tube section can be tightened into the threaded hole on the blade through outward expansion, thus preventing the hinge bolt from loosening.

[0005] Furthermore, in the aforementioned anti-loosening hinge structure of scissors-like tools, both the hinge bolt and the expansion bolt have round heads.

[0006] Furthermore, in the aforementioned anti-loosening hinge structure of scissors-like tools, an axial through hole is provided at the center of both the hinge bolt and the tightening bolt.

[0007] Furthermore, in the aforementioned anti-loosening hinge structure of scissors-like tools, an axial square through hole is provided at the center of the hinge bolt, and an axial circular through hole is provided at the center of the tightening bolt.

[0008] Furthermore, in the aforementioned anti-loosening hinge structure of scissors-like tools, a wrench slot is provided on the outer end face of the bolt head of the tightening bolt.

[0009] Furthermore, in the aforementioned anti-loosening hinge structure for scissors-like tools, a blank sidewall without external threads is provided at the innermost end of the stud section of the expansion bolt. When the expansion bolt tightens the hinge bolt, the external threads of the stud section of the expansion bolt are completely screwed into the internal threads of the threaded tube section of the hinge bolt. After being tightened by external force, the expansion bolt can be locked with the internal threads of the threaded tube section through the top of the blank sidewall at the end of its external threads, thus preventing the expansion bolt from loosening.

[0010] The scissors employing the aforementioned anti-loosening hinge structure include: two blades; one blade has a threaded hole at its hinge joint, and the other blade has a hinge hole at its hinge joint; a hinge bolt passes through the hinge hole and is screwed into the threaded hole, allowing the two blades to be hinged together by the hinge bolt; the blade with the hinge hole can rotate around the smooth rod section; the shearing tightness of the two blades can be adjusted by adjusting the screwing depth of the hinge bolt; the stud section of the expansion bolt is screwed into the threaded section of the hinge bolt until the tail of the threaded section of the hinge bolt expands outward and tightens into the threaded hole on the blade, thereby preventing the hinge bolt from loosening.

[0011] The advantages of this utility model are: the anti-loosening hinge structure can be tightened by screwing in the expansion bolt after the hinge bolt is adjusted to the screw-in depth, thereby preventing the hinge bolt from loosening, which can greatly increase the service life and comfort of scissors. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of the anti-loosening hinge structure of the scissors-type tools described in this utility model.

[0013] Figure 2 This is a structural schematic diagram of a hinge bolt from one perspective.

[0014] Figure 3 This is a structural schematic diagram of a hinge bolt from another perspective.

[0015] Figure 4 This is a structural schematic diagram of an expansion bolt from one perspective.

[0016] Figure 5 This is a structural schematic diagram of an expansion bolt from another perspective.

[0017] Figure 6 This is a structural diagram of scissors from one perspective.

[0018] Figure 7 This is a structural diagram of scissors from another perspective. Detailed Implementation

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

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the anti-loosening hinge structure of scissors includes: a hinge bolt 1 and a tightening bolt 2. The middle part of the hinge bolt 1 is a smooth rod section 3, and the tail is a threaded tube section 4. The outer wall of the threaded tube section 4 is provided with external threads. The hinge bolt 1 can be threadedly connected to a threaded hole on a blade 13 of the scissors through the external threads on the threaded tube section 4. The inner wall of the threaded tube section 4 near its tail end is provided with a conical surface 6 whose diameter gradually decreases from the outside to the inside. The inner wall inside the conical surface 6 is provided with internal threads 5. Four long strips are evenly spaced around the circumference of the threaded tube section 4, running along the axial direction of the threaded tube section 4. The expansion bolt 2 has a notch 7, a conical section 8 in the middle, and a stud section 9 with external threads at the tail. The small-diameter end of the conical section 8 is connected to the stud section 9. The stud section 9 of the expansion bolt 2 can be screwed into the internal thread 5 of the threaded tube section 4 of the hinge bolt 1. As it is screwed in, the conical section 8 of the expansion bolt 2 can cooperate with the conical surface 6 on the tail end of the threaded tube section 4 to apply an outward expansion force to the tail end of the threaded tube section 4. Since there is a notch 7 on the tail end of the threaded tube section 4, the tail end of the threaded tube section 4 can expand outward under the action of the outward expansion force, so that the tail end of the threaded tube section 4 can be tightened in the threaded hole in the blade 13 through outward expansion to prevent the hinge bolt 1 from loosening.

[0021] In this embodiment, both the hinge bolt 1 and the expansion bolt 2 have rounded heads, which makes the scissors more aesthetically pleasing. The hinge bolt 1 has an axial square through hole 10 at its center, and the expansion bolt 2 has an axial circular through hole 11 at its center. This design facilitates hanging unused scissors and prevents them from automatically opening when hung through the square through hole 10 and the circular through hole 11 at the hinge, reducing safety hazards. The outer end face of the expansion bolt 2's bolt head has a wrench slot 12 for easy rotation of the expansion bolt 2.

[0022] like Figure 6 , Figure 7As shown, the scissors include: two blades 13, one blade 13 has a threaded hole at its hinge joint, and the other blade 13 has a hinge hole at its hinge joint. A hinge bolt 1 passes through the hinge hole and is screwed into the threaded hole, so that the two blades 13 can be hinged together by the hinge bolt 1. The blade 13 with the hinge hole can rotate around the smooth rod section 3. The cutting tightness of the two blades 13 can be adjusted by adjusting the screwing depth of the hinge bolt 1. The stud section 9 of the expansion bolt 2 is screwed into the threaded tube section 4 of the hinge bolt 1 until the tail of the threaded tube section 4 of the hinge bolt 1 expands outward and tightens into the threaded hole on the blade 13, thereby preventing the hinge bolt 1 from loosening.

[0023] In actual manufacturing, a blank sidewall 91 without external threads is provided on the innermost end of the stud section 9 of the expansion bolt 2. When the expansion bolt 2 tightens the hinge bolt 1, there is still a gap 20 between the innermost end of the internal threads of the expansion bolt 2 and the threaded section of the hinge bolt 1. The external threads of the stud section 9 of the expansion bolt 2 are all screwed into the internal threads 5 of the threaded section 4 of the hinge bolt 1. After being tightened by external force, the expansion bolt 2 can be locked with the internal threads 5 of the threaded section 4 through the top of the blank sidewall at the end of its external threads to prevent the expansion bolt 2 from loosening.

Claims

1. Anti-loosening hinge structures for scissor-type tools, including: A hinge bolt, characterized in that it further comprises: an expansion bolt, wherein the middle part of the hinge bolt is a smooth section and the tail is a threaded section, the outer wall of the threaded section is provided with external threads, the hinge bolt can be threadedly connected to a threaded hole on a blade of a scissor-like tool through the external threads on the threaded section, the inner wall of the threaded section near its tail is provided with a conical surface whose diameter gradually decreases from the outside to the inside, the inner wall of the inner side of the conical surface is provided with internal threads, and at least two elongated notches are provided on the tail side wall of the threaded section, arranged circumferentially around the threaded section and running along the axial direction of the threaded section. The expansion bolt has a conical section in the middle and a stud section with external threads at the tail. The small-diameter end of the conical section is connected to the stud section. The stud section of the expansion bolt can be screwed into the internal thread of the threaded tube section of the hinge bolt. As it is screwed in, the conical section of the expansion bolt can cooperate with the conical surface on the tail end of the threaded tube section to apply an outward expansion force to the tail end of the threaded tube section. Because there is a notch on the tail end of the threaded tube section, the tail end of the threaded tube section can expand outward under the action of the outward expansion force, so that the tail end of the threaded tube section can be tightened in the threaded hole on the blade through outward expansion to prevent the hinge bolt from loosening.

2. The anti-loosening hinge structure for scissors-like tools according to claim 1, characterized in that: Both hinge bolts and expansion bolts have round heads.

3. The anti-loosening hinge structure for scissors-like tools according to claim 1, characterized in that: Both the hinge bolt and the expansion bolt have an axial through hole at their center.

4. The anti-loosening hinge structure for scissors-like tools according to claim 3, characterized in that: The hinge bolt has an axial square through hole at its center, and the expansion bolt has an axial circular through hole at its center.

5. The anti-loosening hinge structure for scissors-like tools according to claim 1, characterized in that: A wrench slot is provided on the outer end face of the bolt head of the expansion bolt.

6. The anti-loosening hinge structure for scissors-like tools according to claim 1, characterized in that: The innermost end of the stud section of the expansion bolt is provided with a blank sidewall without external threads. When the expansion bolt tightens the hinge bolt, the external threads of the stud section of the expansion bolt are all screwed into the internal threads of the threaded tube section of the hinge bolt. After being tightened by external force, the expansion bolt can be locked with the internal threads of the threaded tube section through the top of the blank sidewall at the end of its external threads to prevent the expansion bolt from loosening.

7. Scissors employing the anti-loosening hinge structure of scissors-like tools as described in claim 1, 2, 3, 4, 5, or 6, comprising: Two blades, characterized in that: one blade has a threaded hole at its hinge joint, and the other blade has a hinge hole at its hinge joint; a hinge bolt passes through the hinge hole and is screwed into the threaded hole, so that the two blades can be hinged together by the hinge bolt; the blade with the hinge hole can rotate around the polished rod section; the shearing tightness of the two blades can be adjusted by adjusting the screwing depth of the hinge bolt; the stud section of the tightening bolt is screwed into the threaded section of the hinge bolt until the tail of the threaded section of the hinge bolt expands outward and tightens into the threaded hole on the blade, thereby preventing the hinge bolt from loosening.

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