A multi-functional screwdriver

Abstract

The application discloses a multifunctional screwdriver, and particularly relates to the technical field of laboratory tools, which comprises a screw shank, a screw rod and a screw anti-falling device, wherein the screw anti-falling device comprises a fixed sleeve and a rotating seat; the rotating seat is rotatably installed on the screw shank, the lower ends of the fixed sleeve and the rotating seat are rotatably connected, and the screw rod is located in the hollow interior of the fixed sleeve. The multifunctional screwdriver can rotate and extend the fixed sleeve, isolate the end head connected with the screwdriver, avoid the falling of the screw caused by the impact of touch, and reduce the falling probability of the screw.

Description

Technical Field

[0001] This application relates to the field of laboratory tool technology, and more particularly to a multi-functional screwdriver. Background Technology

[0002] Screwdrivers are frequently used when repairing laboratory instruments or other electrical appliances. This is especially true when disassembling and repairing chromatography instruments, where the screws, once unscrewed, can be difficult to remove with just fingers due to the limited internal space.

[0003] Therefore, the laboratory commonly uses screwdrivers with magnetic tips for disassembly or repair. However, screwdrivers with magnetic tips also have the following problems when used: 1. When technicians remove the screwdriver and screw together, the end of the screw connected to the screwdriver may come into contact with the inside of the machine, causing the screw to fall off. Once the screw falls into the precision instrument, it may come into contact with the electrically conductive parts and damage the instrument. Utility Model Content

[0004] This utility model provides a multi-functional screwdriver. This multi-functional screwdriver is designed with a rotatable and extendable fixed sleeve to isolate the screw and the screwdriver end, preventing them from falling off due to contact or impact, thereby reducing the chance of the screw falling off.

[0005] The objective of this utility model is achieved through the following technical solution: A multi-functional screwdriver includes a shank, a screw rod, and a screw anti-loosening device. The screw anti-loosening device includes a fixed sleeve and a rotating seat. The rotating seat is rotatably mounted on the shank. The lower ends of the fixed sleeve and the rotating seat are rotatably connected. The screw rod is located inside the hollow part of the fixed sleeve.

[0006] Preferably, the screw anti-loosening device also includes an annular rubber sheet, which is fixedly bonded to the end of the fixing sleeve.

[0007] Preferably, the side of the annular rubber sheet that contacts the screw is an inclined surface, and the thickness of the annular rubber sheet gradually increases from bottom to top along the centerline of the screw.

[0008] Preferably, the lower end of the rotating seat is provided with an L-shaped connecting part, and the inner side of the L-shaped connecting part is provided with a threaded groove. Correspondingly, the upper end of the fixed sleeve is provided with a threaded section that matches the threaded groove.

[0009] Preferably, the end of the screw shank connected to the screw rod is provided with a receiving groove, which is adapted to the free movement of the fixed sleeve.

[0010] Preferably, the rotating seat is provided with anti-slip ribs.

[0011] Preferably, the screw shank is provided with an annular groove, and correspondingly, the inner side of the rotating seat is provided with a positioning protrusion that matches the annular groove.

[0012] Preferably, the end of the screw is a magnetic suction head.

[0013] Compared with the prior art, the advantages or beneficial effects of the technical solution of this application include: 1. By installing a fixing sleeve on the outside of the screw, it can extend after the screw is unscrewed to surround the circumference of the screw, preventing the screw and the end of the screw rod from touching the inner wall of the instrument and causing the screw to fall off.

[0014] 2. Once the screw is almost fully unscrewed, rotate the rotating base to allow the retaining sleeve to surround the screw. This prevents the screw from falling directly into the instrument due to excessive force applied during unscrewing. Technicians can then safely unscrew the screw and remove it using the magnetic head at the end of the screw. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a multi-functional screwdriver; Figure 2 This is a cross-sectional view of a multi-functional screwdriver (the retaining sleeve does not cover the screw end). Figure 3 This is a cross-sectional view of a multi-functional screwdriver (with a retaining sleeve covering the screw tip). Figure 4 for Figure 3 Enlarged view of part A in the image; Figure 5 for Figure 3 Enlarged view of part B in the image.

[0016] In the diagram: 1. Screw shank, 2. Anti-slip rib, 3. Rotating seat, 5. Screw, 6. Screw, 7. Fixing sleeve, 8. Annular rubber sheet, 9. Receiving groove, 10. Threaded groove, 12. L-shaped connecting part. Detailed Implementation

[0017] The following detailed description of the embodiments of this application, in conjunction with the accompanying drawings, will provide a thorough understanding of how this application uses technical means to solve technical problems and achieve corresponding technical effects, enabling its implementation. The embodiments of this application and the various features within them can be combined with each other without conflict, and all resulting technical solutions are within the protection scope of this application.

[0018] It should be clearly stated that the embodiments described below are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] Example 1: This example provides a detailed description of a multi-functional screwdriver solution: like Figures 1-5 As shown, a multi-functional screwdriver includes a shank 1, a screw 5, and a screw anti-loosening device. The screw anti-loosening device includes a fixed sleeve 7 and a rotating base 3. The rotating base 3 is rotatably mounted on the shank 1. The lower ends of the fixed sleeve 7 and the rotating base 3 are rotatably connected, and the screw 5 is located inside the hollow cavity of the fixed sleeve 7. The lower end of the rotating base 3 is provided with an L-shaped connecting part 12, and the inner side of the L-shaped connecting part 12 is provided with a threaded groove 10. Correspondingly, the upper end of the fixed sleeve 7 is provided with a threaded section 13 that matches the threaded groove 10.

[0020] See Figure 1-3 When a technician is repairing an instrument, they hold the screw handle 1 and rotate it to unscrew the screw from the screw hole. When the screw is about to come out of the screw hole, the technician presses down on the fixing sleeve 7 with one hand, and then rotates the rotating seat 3 with the other hand. This causes the fixing sleeve 7 to not rotate synchronously with the rotating seat 3, so the fixing sleeve 7 will extend along the screw rod 5, thus surrounding the screw that is about to come out. At this time, the technician can safely rotate the screw handle 1 until the screw is completely separated from the screw hole.

[0021] like Figure 2 and Figure 3 As shown, the screw anti-loosening device also includes an annular rubber sheet 8, which is fixedly bonded to the end of the fixing sleeve 7. The surface of the annular rubber sheet 8 that contacts the screw 6 is inclined, and the thickness of the annular rubber sheet 8 gradually increases from bottom to top along the center line of the screw 5.

[0022] The function of the annular rubber sheet 8 is to secure it to the end of the screw, further preventing the screw from falling out. At the same time, the annular rubber sheet 8 is wedge-shaped, gradually increasing in thickness from thin to thick, allowing the screw end to slowly embed and lock into it.

[0023] like Figure 2 and Figure 3 As shown, the end of the screw shank 1 connected to the screw rod 5 is provided with a receiving groove 9, which is adapted to the free movement of the fixing sleeve 7. During the up-and-down movement of the fixing sleeve 7, the pre-reserved receiving groove 9 allows the fixing sleeve 7 to move upward until the screw end of the screw rod 5 is fully exposed, thereby avoiding the fixing sleeve 7 from affecting the screw unscrewing at the beginning.

[0024] In this embodiment, the rotating seat 3 is provided with anti-slip ribs 2.

[0025] like Figure 2 As shown, the screw shank 1 has an annular groove, and correspondingly, the inner side of the rotating seat 3 has a positioning protrusion that matches the annular groove. Through the cooperation between the annular groove and the positioning protrusion, the position of the rotating seat 3 can be controlled, preventing it from moving up and down along the screw shank 1, thus achieving a positioning effect.

[0026] In this embodiment, the end of the screw 5 is a magnetic suction head. The function of the magnetic suction head is to achieve the multi-functionality of this screwdriver. For example, in repair work with ample space, the screw can be prevented from falling out directly through the magnetic attraction between the magnetic suction head and the screw without the need for the fixing sleeve 7. When the repair space is small, the fixing sleeve 7 can be used to further strengthen the fixation of the screw, thereby preventing the screw from falling out and affecting the internal circuitry of the precision instrument. Whether to extend the fixing sleeve 7 is determined by the technician based on the internal conditions of the instrument, providing a versatile multi-functional switching effect.

[0027] Example 2: Disassembly of internal screws of the chromatograph Scenario Description: Technicians need to remove the screws securing the internal circuit board of a chromatograph. The instrument's interior space is narrow, and the screws are located in the gap between the circuit board and the metal casing. Traditional magnetic screwdrivers are prone to causing the screws to fall off when trying to remove them by touching the inner wall.

[0028] Operating procedures Initial state: The fixed sleeve retracts into the receiving groove of the screw shank, and the screw magnetic head attracts the screw and begins to tighten.

[0029] When the screw is about to be fully unscrewed: press your finger on the retaining sleeve 7 and rotate the rotating seat counterclockwise at the same time.

[0030] Sleeve extension: The threaded groove of the rotating seat causes the threaded section of the fixed sleeve to move downward, and the sleeve completely covers the screw head (e.g., Figure 3 (As shown).

[0031] Safe removal: Continue rotating the screw shank until the screw comes out of the screw hole. The screw is double-secured by the sleeve and rubber sheet to prevent it from touching the inner wall of the instrument or falling onto the circuit board.

[0032] Technical advantages: The beveled design of the annular rubber sheet tightly engages the screw edge to prevent wobbling; the sleeve isolates the screw from the inner wall of the instrument, solving the problem of retrieving screws in narrow spaces.

Claims

1. A multi-functional screwdriver, characterized in that, It includes a screw shank (1), a screw rod (5) and a screw anti-loosening device, wherein the screw anti-loosening device includes a fixed sleeve (7) and a rotating seat (3); The rotating seat (3) is rotatably mounted on the screw shank (1), the lower end of the fixed sleeve (7) and the rotating seat (3) are rotatably connected, and the screw (5) is located inside the hollow part of the fixed sleeve (7).

2. A multi-functional screwdriver according to claim 1, characterized in that, The screw anti-loosening device also includes an annular rubber sheet (8), which is fixedly bonded to the end of the fixing sleeve (7).

3. A multi-functional screwdriver according to claim 2, characterized in that, The contact surface between the annular rubber sheet (8) and the screw (6) is an inclined surface, and the thickness of the annular rubber sheet (8) gradually increases from bottom to top along the center line of the screw (5).

4. A multi-functional screwdriver according to claim 1, characterized in that, The lower end of the rotating seat (3) is provided with an L-shaped connecting part (12), and the inner side of the L-shaped connecting part (12) is provided with a threaded groove (10). Correspondingly, the upper end of the fixed sleeve (7) is provided with a threaded section (13) that is adapted to the threaded groove (10).

5. A multi-functional screwdriver according to claim 1, characterized in that, The end of the screw shank (1) connected to the screw rod (5) is provided with a receiving groove (9), which is adapted to the free movement of the fixed sleeve (7).

6. A multi-functional screwdriver according to claim 1, characterized in that, The rotating seat (3) is provided with anti-slip ribs (2).

7. A multi-functional screwdriver according to claim 1, characterized in that, The screw shank (1) is provided with an annular groove, and correspondingly, the inner side of the rotating seat (3) is provided with a positioning protrusion that matches the annular groove.

8. A multi-functional screwdriver according to claim 1, characterized in that, The end of the screw (5) is a magnetic suction head.

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