Novel self-tapping screw

Abstract

The utility model discloses a novel self-tapping screw which comprises a self-tapping screw body, a round fixing block is fixedly installed on the upper surface of the self-tapping screw body, a fixing base is fixedly installed in the middle of the upper surface of the round fixing block, and a protection structure is arranged in the fixing base. The protection structure comprises a cross groove, a cross cover plate, a first mounting base, a first rotating shaft rod, a cylindrical groove, a movable rod, a rectangular sliding groove, a second mounting base, a second rotating shaft rod, a reset spring, a circular guide rod, a rectangular sliding block, a circular sliding hole and a fixing rod. According to the novel self-tapping screw, after the self-tapping screw body is installed, the cross-shaped groove can be protected, an operator can use the novel self-tapping screw conveniently, and the situation that dirt is generated in the cross-shaped groove, a screwdriver cannot be effectively clamped in the cross-shaped groove in the disassembling and assembling process, and therefore the disassembling efficiency is reduced is avoided; and the overall attractiveness of the self-tapping screw body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of self - tapping screws, and particularly relates to a new type of self - tapping screw. Background Art

[0002] Self - tapping screws are generally pointed, coarse - threaded, and relatively hard wood screws. There are also those made of aluminum alloy and plastic. A special self - tapping screw used for threading metal holes is called a tap. Self - tapping screws are used for non - metals or softer metals without pre - drilling holes and tapping. Self - tapping screws are pointed so that they can "self - tap". Ordinary screws are flat - headed and of uniform thickness. Self - tapping screws mean that the drilled holes do not require tapping. The screws used are different from ordinary ones. The head is pointed and the thread pitch is relatively large, which is a bit like a non - chipping tap. It can be screwed in directly without tapping. Metals and plastics usually use this method. It can, on the material to be consolidated, rely on its own threads to "drill, squeeze, and press" corresponding threads on the object to be consolidated, so that they fit tightly with each other. However, when the currently used self - tapping screws are placed in the external environment for a long time, dirt is likely to accumulate inside the cross - slot. During the disassembly and assembly process, the screwdriver cannot be effectively clamped inside the cross - slot, resulting in a decrease in disassembly efficiency and an unappealing appearance. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a new type of self - tapping screw, which can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A new type of self - tapping screw includes a self - tapping screw body. A circular fixing block is fixedly installed on the upper surface of the self - tapping screw body. A fixing seat is fixedly installed in the middle of the upper surface of the circular fixing block. A protection structure is arranged inside the fixing seat. The protection structure includes a cross - slot, a cross - cover plate, a first mounting seat, a first rotating shaft rod, a cylindrical slot, a movable rod, a rectangular sliding slot, a second mounting seat, a second rotating shaft rod, a return spring, a circular guide rod, a rectangular slider, a circular sliding hole, and a fixing rod.

[0006] Preferably, a cylindrical slot is opened inside the fixing seat. A cross - slot is opened on the upper surface of the cylindrical slot. A cross - cover plate is slidably installed in the cross - slot. First mounting seats are fixedly installed at both ends near the lower surface of the cross - cover plate.

[0007] Preferably, a first rotating shaft rod is movably installed on the first mounting seat. A movable rod is fixedly installed on the outer surface of the first rotating shaft rod. Fixing rods are fixedly installed at both ends near the front and rear of the lower surface of the cross - cover plate.

[0008] Preferably, rectangular sliding grooves are formed at both ends of the middle part of the bottom surface of the cylindrical groove. Circular guide rods are fixedly installed in the middle of the two end surfaces of the rectangular sliding grooves, and circular sliding holes are formed in the rectangular sliders.

[0009] Preferably, a circular guide rod is slidably installed on the inner surface of the circular sliding hole. A second mounting seat is fixedly installed on the upper surface of the rectangular slider, and a second rotating shaft rod is movably installed on the second mounting seat.

[0010] Preferably, a movable rod is fixedly installed on the outer surface of the second rotating shaft rod, and a return spring is sleeved on one end of the rectangular slider on the outer surface of the circular guide rod.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, through the arranged protection structure, after the self-tapping screw body is installed, the cross groove can be protected, which is convenient for the operator to use, avoids the generation of dirt inside the cross groove, and prevents the screwdriver from being effectively clamped inside the cross groove during the disassembly and assembly process, thus reducing the disassembly efficiency. Moreover, the overall beauty of the self-tapping screw body is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the overall structural schematic diagram of a new type of self-tapping screw of the utility model;

[0014] Figure 2 is the partial sectional view of a new type of self-tapping screw of the utility model;

[0015] Figure 3 is a new type of self-tapping screw of the utility model Figure 2 magnified view at A in.

[0016] In the figure: 1, self-tapping screw body; 2, circular fixing block; 3, fixing seat; 4, protection structure; 401, cross groove; 402, cross cover plate; 403, first mounting seat; 404, first rotating shaft rod; 405, cylindrical groove; 406, movable rod; 407, rectangular sliding groove; 408, second mounting seat; 409, second rotating shaft rod; 410, return spring; 411, circular guide rod; 412, rectangular slider; 413, circular sliding hole; 414, fixing rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the technical means, creative features, achieved purposes and functions of the utility model easy to understand, the utility model will be further described below in conjunction with specific embodiments.

[0018] As Figures 1-3As shown in the figure, a new type of self-tapping screw includes a self-tapping screw body 1. A circular fixing block 2 is fixedly installed on the upper surface of the self-tapping screw body 1. A fixing seat 3 is fixedly installed in the middle of the upper surface of the circular fixing block 2. A protective structure 4 is arranged inside the fixing seat 3. The protective structure 4 includes a cross slot 401, a cross cover plate 402, a first mounting seat 403, a first rotating shaft rod 404, a cylindrical slot 405, a movable rod 406, a rectangular sliding slot 407, a second mounting seat 408, a second rotating shaft rod 409, a return spring 410, a circular guide rod 411, a rectangular slider 412, a circular sliding hole 413, and a fixing rod 414;

[0019] A cylindrical slot 405 is opened inside the fixing seat 3. A cross slot 401 is opened on the upper surface of the cylindrical slot 405. A cross cover plate 402 is slidably installed in the cross slot 401. First mounting seats 403 are fixedly installed at both ends of the lower surface of the cross cover plate 402 near the two ends. A first rotating shaft rod 404 is movably installed on the first mounting seat 403. A movable rod 406 is fixedly installed on the outer surface of the first rotating shaft rod 404. Fixing rods 414 are fixedly installed at both ends of the lower surface of the cross cover plate 402 near the front and rear ends. Rectangular sliding slots 407 are opened at both ends of the middle of the bottom surface of the cylindrical slot 405. Circular guide rods 411 are fixedly installed in the middle of the two ends of the surface of the rectangular sliding slots 407. A circular sliding hole 413 is opened on the rectangular slider 412. The circular guide rod 411 is slidably installed on the inner surface of the circular sliding hole 413. A second mounting seat 408 is fixedly installed on the upper surface of the rectangular slider 412. A second rotating shaft rod 409 is movably installed on the second mounting seat 408. A movable rod 406 is fixedly installed on the outer surface of the second rotating shaft rod 409. A return spring 410 is sleeved on one end of the rectangular slider 412 on the outer surface of the circular guide rod 411. After the self-tapping screw body 1 is installed, it can protect the cross slot 401, which is convenient for the operator to use, avoid dirt from generating inside the cross slot, resulting in the screwdriver being unable to be effectively clamped inside the cross slot during the disassembly and assembly process, thus reducing the disassembly efficiency. Moreover, it can also improve the overall aesthetics of the self-tapping screw body 1.

[0020] It should be noted that the present utility model is a new type of self-tapping screw. When in use, first, the screwdriver needs to be inserted into the cross slot 401, so that the cross cover plate 402 moves downward in the cross slot 401 and enters the cylindrical slot 405, driving the first mounting seat 403 fixedly installed near both ends of the lower surface of the cross cover plate 402 to move downward, causing the upper end of the movable rod 406 to drive the first rotating shaft rod 404 to rotate on the first mounting seat 403, and the lower end of the movable rod 406 to drive the second rotating shaft rod 409 to rotate on the second mounting seat 408, and driving the second mounting seat 408 to move towards one end, so that the rectangular slider 412 fixedly installed at the lower end of the second mounting seat 408 slides towards one end on the circular guide rod 411 and compresses the return spring 410 until the fixing rods 414 fixedly installed near the front and rear ends of the lower surface of the cross cover plate 402 contact the bottom surface of the cylindrical slot 405. Then, rotate the screwdriver, so that the self-tapping screw body 1 rotates until the self-tapping screw body 1 is completely embedded in the object. Then, pull the screwdriver upward to make the screwdriver disengage from the cross slot 401. At this time, under the action of the return spring 410, the cross cover plate 402 is driven to move upward to completely cover the cross slot 401, avoiding the generation of dirt inside the cross slot and causing the screwdriver to be unable to be effectively clamped inside the cross slot during the disassembly and assembly process, thus reducing the disassembly efficiency.

[0021] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A new self-tapping screw, characterized in that: The invention comprises a self-tapping screw body (1), a circular fixing block (2) is fixedly mounted on the upper surface of the self-tapping screw body (1), a fixing seat (3) is fixedly mounted in the middle of the upper surface of the circular fixing block (2), a protective structure (4) is arranged inside the fixing seat (3), and the protective structure (4) comprises a cross groove (401), a cross cover plate (402), a No. 1 mounting seat (403), a No. 1 rotating shaft rod (404), a cylindrical groove (405), a movable rod (406), a rectangular sliding groove (407), a No. 2 mounting seat (408), a No. 2 rotating shaft rod (409), a reset spring (410), a circular guide rod (411), a rectangular sliding block (412), a circular sliding hole (413), and a fixing rod (414).

2. A new self-tapping screw according to claim 1, characterized in that: A cylindrical groove (405) is provided inside the fixing seat (3), a cross groove (401) is provided on the upper surface of the cylindrical groove (405), a cross cover plate (402) is slidably mounted in the cross groove (401), and a No. 1 mounting seat (403) is fixedly mounted on the lower surface of the cross cover plate (402) near both ends.

3. A new self-tapping screw according to claim 2, characterized in that: A No. 1 rotating shaft (404) is movably mounted on the No. 1 mounting seat (403), a movable rod (406) is fixedly mounted on the outer surface of the No. 1 rotating shaft (404), and fixed rods (414) are fixedly mounted on the lower surface of the cross cover plate (402) near the front and rear ends.

4. A new self-tapping screw according to claim 3, characterized in that: Rectangular slide grooves (407) are provided at both ends of the middle of the bottom surface of the cylindrical groove (405), circular guide rods (411) are fixedly installed at the middle of the surfaces of both ends of the rectangular slide groove (407), and a circular slide hole (413) is provided on the rectangular slide block (412).

5. A new self-tapping screw according to claim 4, characterized in that: A circular guide rod (411) is slidably mounted on the inner surface of the circular sliding hole (413), a second mounting seat (408) is fixedly mounted on the upper surface of the rectangular sliding block (412), and a second rotating shaft rod (409) is movably mounted on the second mounting seat (408).

6. A new self-tapping screw according to claim 5, characterized in that: A movable rod (406) is fixedly mounted on the outer surface of the second rotating shaft rod (409), and a return spring (410) is sleeved on one end of a rectangular sliding block (412) on the outer surface of the circular guide rod (411).

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