CN108214377B

CN108214377B - Screwdriver

Info

Publication number: CN108214377B
Application number: CN201711347344.XA
Authority: CN
Inventors: 张文清; 冯光; 江素罡; 牛玉凯; 张文霞; 付新军; 宋少伟; 张文利; 姜国强; 段晓洁; 龚英强
Original assignee: State Grid Corp of China SGCC; Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd
Priority date: 2017-12-15
Filing date: 2017-12-15
Publication date: 2020-04-17
Anticipated expiration: 2037-12-15
Also published as: CN108214377A

Abstract

The invention relates to a screwdriver, and belongs to the technical field of hardware tools. A screwdriver comprises a screwdriver with a handle part and a screwdriver body part, and further comprises a sleeve assembly with a bit sleeve and a sliding sleeve; one end of the tool bit sleeve is a screw inlet and outlet end, and the other end of the tool bit sleeve is a sleeved end provided with a first clamping part protruding outwards from the surface; the screw inlet and outlet ends of the tool bit sleeve are conical shells with screw inlet and outlet openings formed in the side surfaces; one end of the sliding sleeve and the lower end of the handle part are fixed, and the other end of the sliding sleeve is provided with a second clamping stop part protruding inwards; the sleeve end of the cutter head sleeve is sleeved in the sliding sleeve, and the clamping part one is positioned on the inner side of the clamping part two of the sliding sleeve. The screwdriver disclosed by the invention is reasonable in structural design, and can effectively solve the problem that time and labor are wasted in installation and disassembly due to falling of screws which often occur when workers install and disassemble the screws. The invention can save the operation time, improve the working efficiency and has good use performance.

Description

Screwdriver

Technical Field

The invention relates to a screwdriver, and belongs to the technical field of hardware tools.

Background

The screwdriver is one of the most frequently used tools in the daily equipment maintenance and installation process, and a large number of screws are often required to be detached or installed in mechanical equipment or electronic power equipment.

Many problems appear in the screwdriver in frequent use, and every maintainer always has the situation that the screw is dropped or the screw is installed in a narrow place which is time-consuming, labor-consuming and can not be stretched by hands. For example, when a terminal block of a relay, a voltmeter, a signal lamp, a resistor, and the like of a device is disconnected or disconnected. The maintenance needs frequent disassembly, assembly and disassembly, screw tightening or disassembly and measurement of the screw of the wiring terminal. The screw often falls to ground, because all be cable and wire-way outlet everywhere in the distribution board, the screw that falls to ground most all falls into in the cable-way outlet, can't pick up, brings a lot of obstacles for the maintainer. When mechanical equipment is maintained, screws can fall into narrow gaps or the interior of the mechanical equipment carelessly, and potential safety hazards are brought to operation of the mechanical equipment if the screws are serious.

Disclosure of Invention

The invention aims to provide a screwdriver which can prevent screws from falling off and is convenient to mount and dismount the screws.

In order to achieve the purpose, the invention adopts the technical scheme that:

a screwdriver comprises a screwdriver with a handle part and a screwdriver body part, and further comprises a sleeve assembly with a bit sleeve and a sliding sleeve; one end of the tool bit sleeve is a screw inlet and outlet end, and the other end of the tool bit sleeve is a sleeved end provided with a first clamping part protruding outwards from the surface; the screw inlet and outlet ends of the tool bit sleeve are conical shells with screw inlet and outlet openings formed in the side surfaces; one end of the sliding sleeve and the lower end of the handle part are fixed, and the other end of the sliding sleeve is provided with a second clamping stop part protruding inwards; the sleeve end of the cutter head sleeve is sleeved in the sliding sleeve, and the clamping part one is positioned on the inner side of the clamping part two of the sliding sleeve.

The technical scheme of the invention is further improved as follows: the sleeving end of the tool bit sleeve and the sliding sleeve is provided with a pressure spring sleeving section, the diameter of the pressure spring sleeving section is smaller than the inner diameter of a pressure spring, and the pressure spring sleeving section is sleeved with the pressure spring.

The technical scheme of the invention is further improved as follows: the length of the pressure spring sleeving section is 3-6 cm.

The technical scheme of the invention is further improved as follows: the screw inlet and outlet are a plurality of open slots arranged on the conical shell.

The technical scheme of the invention is further improved as follows: the open slots are oppositely arranged.

The technical scheme of the invention is further improved as follows: a pair of screw clamping pliers are fixedly arranged in the conical shell at the screw inlet and outlet ends, and the screw clamping pliers arranged in pairs are fixed at the positions of the two oppositely arranged opening grooves; the lower part of the cutter body part is provided with a convex part for controlling the opening and closing of the screw jaw clamp.

The technical scheme of the invention is further improved as follows: the lower extreme of handle portion sets up the screw thread section that is used for with sliding sleeve connection, and sliding sleeve passes through threaded connection with handle portion lower extreme.

The technical scheme of the invention is further improved as follows: the screw loading box supplies screws into the tool bit sleeve through the screw inlet and the screw outlet; the screw filling box comprises a connecting sleeve sleeved with the tool bit sleeve and an opening box used for placing screws, a second pressure spring used for pushing the screws is arranged on the inner side face of the opening box, and a screw outlet of the opening box and the screw inlet and the screw outlet of the tool bit sleeve are correspondingly arranged.

The technical scheme of the invention is further improved as follows: a corrugated belt for conveying screws is further arranged in the opening box, and the end part of the corrugated belt, which is positioned at the screw outlet, corresponds to the screw inlet and the screw outlet of the cutter head sleeve; and two ends of the inner side of the corrugated belt are provided with rotating wheels for driving the corrugated belt to rotate around.

The technical scheme of the invention is further improved as follows: the side surface of a connecting sleeve of the screw filling box is provided with an installation positioning groove used for being fixed with the tool bit sleeve, and the outer side surface of the tool bit sleeve is provided with a positioning screw matched with the installation positioning groove.

Due to the adoption of the technical scheme, the invention has the following technical effects:

the screwdriver is provided with the tool bit sleeve with the screw inlet and the screw outlet, so that the screw can be prevented from falling off during mounting and dismounting, meanwhile, the sliding sleeve is matched with the tool bit sleeve to form the sleeve assembly, and the screwdriver can be matched with the whole sleeve assembly for use after being combined with the sliding sleeve, so that the function of preventing the screw from falling off is realized.

According to the invention, the sleeve assembly is internally provided with the first pressure spring, so that the combined part of the sliding sleeve and the screwdriver and the sleeve part of the tool bit can be limited to move randomly, and the operation of installing and disassembling the screw is convenient.

According to the screwdriver, the screw clamping pliers are arranged, so that the screwdriver can clamp the screw more stably, and the stability of the screw falling prevention function of the screwdriver is further improved. Meanwhile, the bulge part for controlling the opening and closing of the screw jaw vice is arranged on the cutter body part, so that the opening and closing of the screw jaw vice can be controlled in the moving process of the operation screwdriver, and the operation is very convenient.

The handle part is in threaded connection with the sliding sleeve, so that the screwdriver and the sleeve component can be quickly detached and connected, and the practical use is facilitated.

The screw filling box provided by the invention can realize automatic filling of screws, further improves the function of the screwdriver and improves the convenience of using the screwdriver.

The invention has simple structure, convenient operation and use, can save the operation time and improve the working efficiency, and has good use performance.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the invention in an exploded state;

FIG. 3 is a schematic view of a tool bit sleeve of the present invention;

FIG. 4 is a schematic view of a bit sleeve of the present invention with screw jaw pliers provided;

FIG. 5 is a schematic view of the screw cartridge and bit sleeve of the present invention in combination;

FIG. 6 is a perspective view of the screw cassette of the present invention;

FIG. 7 is a single-piece, diagrammatic view of the screwdriver of the present invention;

FIG. 8 is a schematic view of the relative positions of the screwdriver and screw pliers of the present invention when not in operation;

FIG. 9 is a schematic view of the relative positions of the screwdriver and screw pliers of the present invention during operation;

the tool comprises a handle part 1, a handle part 1-1, a thread section 2, a tool body part 2-1, a protruding part 3, a tool bit sleeve 3-1, a first clamping part 3-2, a pressure spring sleeving section 4, a sliding sleeve 4-1, a second clamping part 5, a first pressure spring 6, an open slot 7, a screw clamp jaw 7-1, a clamp protruding part 8, a screw filling box 8-1, a connecting sleeve 8-2, an opening box 8-3, an installation positioning groove 9, a second pressure spring 10, a corrugated belt 11, a rotating wheel 12, a positioning screw 13 and a screw.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific embodiments:

the invention discloses a screwdriver, which is a hardware tool and has the function of preventing screws from falling off after the existing screwdriver is improved.

As shown in fig. 1, 2, and 3, the screwdriver of the present invention is a screwdriver having a grip portion 1 and a blade portion 2, and a sleeve assembly having a blade sleeve 3 and a sliding sleeve 4 is provided on the blade portion 2 of the screwdriver. Wherein, the sliding sleeve 4 is positioned above and fixedly connected with the lower end of the handle part 1, and the tool bit sleeve 3 is sleeved below the sliding sleeve 4. The sliding sleeve 4 is used for driving the screwdriver to move back and forth so as to install and detach the screw, and the lower end of the tool bit sleeve 3 can play a clamping and supporting role on the screw, so that the screw is prevented from falling. The body 2 of the screwdriver is inside the bit sleeve.

One end of the tool bit sleeve 3 is specifically a screw inlet and outlet end according to the used shape, and the other end is a sleeve end, namely one end connected with the sliding sleeve 4. The sleeve end of the tool bit sleeve is provided with a first clamping part 3-1 protruding outwards from the surface, the end, connected with the tool bit sleeve 3, of the sliding sleeve 4 is correspondingly provided with a second clamping part 4-1 protruding inwards, and the second clamping part 4-1 protrudes inwards to the inner side face. When the tool bit sleeve is used, the sliding sleeve 4 is sleeved at the sleeved end of the tool bit sleeve 3, the sliding sleeve 4 is arranged in the outer tool bit sleeve 3, the first clamping part 3-1 is arranged in the sliding sleeve 4, and the first clamping part 3-1 is arranged on the inner side of the second clamping part 4-1. In specific implementation, the first clamping part 3-1 is a circular truncated cone protruding out of the outer side face of the tool bit sleeve 3, and the second clamping part 4-1 is a circular truncated cone protruding out of the inner wall of the sliding sleeve 4. The screw inlet and outlet ends of the tool bit sleeve 3 are arranged to be conical shells with screw inlet and outlet openings formed in the side surfaces, as shown in fig. 3, the conical shells are arranged in an inverted mode, and therefore the lower ends of the conical shells have clamping effects on the screws. A first pressure spring 5 is arranged in the sliding sleeve 4, and the first pressure spring 5 is used for enabling the screwdriver to automatically return and limiting the screwdriver to move freely. In specific implementation, a first pressure spring 5 is arranged for convenience in installation, a pressure spring sleeving section 3-2 with the diameter smaller than the inner diameter of the first pressure spring 5 is arranged at the sleeving end of the tool bit sleeve 3 and the sliding sleeve 4, the first pressure spring 5 is sleeved into the pressure spring sleeving section 3-2, the first pressure spring 5 cannot swing along the radial direction of the tool bit sleeve 3 during use, and the screwdriver and the sliding sleeve 4 can be controlled to move along the sliding direction of the tool bit sleeve more conveniently. The outer diameter of the first pressure spring 5 is smaller than the inner diameter of the sliding sleeve 4 and is also smaller than the outer diameter of the cutter head sleeve 3. The length of the compressed spring sleeving section 3-2 is set to be 3-6 cm, and the use requirement can be met. In the specific implementation of the invention, in order to ensure that the cutter body part 2 of the screwdriver can rotate smoothly, the plastic bearing is fixedly arranged at the upper end inside the cutter head sleeve 3, and the inner diameter of the plastic bearing is in a state of being just matched with the cutter head part 2, so that the cutter body part 2 can be accurately aligned to a screw to be installed or detached. The specific structure is shown in fig. 2 and 3.

In the present invention, preferably, a threaded section 1-1 for connecting with a sliding sleeve 4 is provided at the lower end of the handle portion 1 of the screwdriver, correspondingly, an internal thread is provided at the inner wall of the end of the sliding sleeve 4 connected with the handle portion 1, and the sliding sleeve 4 is connected with the lower end of the handle portion 1 by a thread, as shown in fig. 2 and 7. This arrangement facilitates the assembly and disassembly of the screwdriver with the sliding sleeve 4, i.e. with the sleeve assembly. When the sleeve component and the screwdriver are detached as required, the screwdriver can be used as a common screwdriver, and the damaged sleeve component can be conveniently replaced.

The screw inlet and outlet of the invention are a plurality of open slots 6 arranged on the conical shell, as shown in fig. 3 and 4. The four open slots 6 are generally oppositely arranged, that is, the four open slots 6 are uniformly distributed on the side surface of the conical shell, and the adjacent open slots 6 are spaced by 90 degrees. In order to facilitate the entry and exit of the screw, especially to adapt to the entry and exit of the nut of the screw, the width of the groove bottom of the open groove 6 is slightly larger, or the groove bottom is directly round. In the invention, the conical shell is made of thin iron sheets, after the open slot 6 is formed, four opposite clamping sheets capable of clamping the screw are formed at the lower end of the conical shell, and the diameter of the small-diameter end of the conical shell is smaller than the outer diameter of the screw, so that the four clamping sheets can clamp the screw, thereby preventing the screw from falling off and facilitating the mounting and dismounting of the screw. Meanwhile, the four clamping pieces formed by the thin iron sheets can be deformed, and when the screwdriver is pulled out, the four clamping pieces are squeezed outwards to release the screw.

In the embodiment of the invention, the screw can be clamped by arranging the screw clamping jaw 7 to prevent the screw from falling off, and the specific structure is shown in fig. 4. The screw clamping pliers 7 are arranged in pairs, and the two screw clamping pliers 7 arranged in pairs are fixed at the positions of the two opening grooves 6 which are oppositely arranged. Specifically, a pair of screw jaw pliers 7 is fixedly arranged in a conical shell at the inlet and outlet ends of the screw, in the scheme, the screw jaw pliers 7 are fixedly arranged at the positions of two symmetrical open grooves 6 by forming four clamping pieces formed by four open grooves 6, and the lower end of the screw jaw pliers 7 is ensured to be positioned within the lower end of the cutter head sleeve 3, as shown in fig. 4. The screw jaw pliers 7 are a pair of steel sheets with clamping openings at the ends and inwards-protruding clamp protruding parts 7-1 at the middle, the V-shaped grooves are sunken from one side to the other side to form the clamp protruding parts 7-1, and the clamp protruding parts 7-1 of the two screw jaw pliers 7 are oppositely and inwards protruding. The screw jaws 7 are arranged inside the tool bit sleeve 3, the clamping convex parts 7-1 of the two screw jaws 7 occupy one third of the space inside the tool bit sleeve 3, when the convex parts 2-1 of the tool bit part 2 pass through, the clamping convex parts 7-1 are pressed to force the opening of the screw jaws 7 to move towards two sides and open, and when the convex parts 2-1 of the tool bit part 2 leave the clamping convex parts 7-1, the two screw jaws 7 are closed and clamped. Since the screw jaws 7 are mounted at the position of the open slot, smooth opening of the jaws of the screw jaws 7 can be ensured. The specific working process is schematically shown in fig. 8 and fig. 9. Fig. 8 shows the position of the driver and the screw clamp 7 when the screw clamp 7 is not opened, and fig. 9 shows the position of the driver and the screw clamp 7 when the screw clamp 7 is opened.

A projection 2-1 for controlling the opening and closing of the screw jaw pliers 7 is provided at the lower part of the cutter body 2, as shown in FIG. 7. The length of the projection part 2-1 from the lowermost end of the cutter body part 2 is consistent with the length of the screw jaw clamp 7, and when the cutter body part 2 moves downwards to the upper end of the projection part 2-1, the projection part 2-1 jacks up the screw jaw clamp 7 so as to loosen a screw; when the cutter body part 2 moves upwards, the projection 2-1 no longer jacks up the screw jaw 7, and the screw jaw 7 is restored.

In addition, for convenience of use, a screw loading box 8 is further arranged, and screws are conveyed into the tool bit sleeve 3 through the screw loading box 8 to be installed and used by a screwdriver, as shown in fig. 5 and 6. Specifically, the screw filling box 8 comprises a connecting sleeve 8-1 sleeved with the cutter head sleeve 3 and an opening box 8-2 used for placing screws, and the connecting sleeve 8-1 and the opening box 8-2 are integrally formed. And a second pressure spring 9 is arranged on the inner side surface of the opening box 8-2 and used for pushing the screw to move towards a screw outlet at the opening end of the opening box 8-2. The screw outlet of the opening box 8-2 is arranged corresponding to the screw inlet and outlet of the tool bit sleeve 3, so that screws in the screw filling box 8 can be conveyed into the tool bit sleeve 3 for being installed and used by a screwdriver.

In order to further optimize the screw feeding process of the screw magazine 8, a corrugated belt 10 for feeding screws 13 is further provided in the open box 8-2, the corrugated belt 10 having a plurality of corrugations formed by folding lines, and the screws 13 are placed at the positions of valleys of the corrugated belt 10, so that the screws 13 can be fed one by one without interfering with each other. The corrugated belt 10 is arranged in the opening box 8-2 along the length direction, and the end part of the opening box 8-2, which is positioned at the nail outlet, is arranged corresponding to the screw inlet and the screw outlet of the cutter head sleeve 3, so that the screws 13 positioned on the corrugated belt 10 can be accurately conveyed into the cutter head sleeve 3. Rotating wheels 11 for driving the corrugated belt 10 to rotate around are arranged at two ends of the inner side of the corrugated belt 10, the corrugated belt 10 rotates around, and the second pressure spring 9 pushes the screw to move to transmit power to the corrugated belt 10 through the screw. And the second pressure spring 9 is positioned above the corrugated belt 10. The specific structure of the runner 11 is that a plurality of rectangular pushing pieces are arranged on the outer side surface of the cylindrical rotating body, and the interaction between the rectangular pushing pieces and the corners formed by the folding lines of the corrugated belt 10 can promote the corrugated belt 10 to rotate in a closed and surrounding manner. Further, a side surface of the opening box 8-2 of the screw cassette 8 may be provided in a non-closed form, and the screw is restricted using a pressing plate and the area of the pressing plate is smaller than that of the non-closed side surface, so that the operation of the screw in the screw cassette 8 can be easily observed. As shown in fig. 6, a side guard is shortened to facilitate the visibility of the structure inside the screw cassette 8.

The screw filling box 8 can be directly sleeved on the outer side surface of the tool bit sleeve 3 through a connecting sleeve 8-1; or can be firmly fixed on the outer side surface of the cutter head sleeve 3 through the installation positioning groove 8-3 and the positioning screw 12. Specifically, the side surface of the connecting sleeve 8-1 is provided with an installation positioning groove 8-3 for fixing with the tool bit sleeve 3, and the corresponding outer side surface of the tool bit sleeve 3 is provided with a positioning screw 12 matched with the installation positioning groove 8-3. The width of the installation positioning groove 8-3 is consistent with the external diameter of the thread section of the positioning screw 12, so that the whole screw filling box 8 cannot rotate along with the tool bit sleeve 3, and the screw outlet of the screw filling box 8 can be ensured to be always aligned with the screw inlet and the screw outlet of the tool bit sleeve 3.

When removing screws using the screwdriver of the present invention, it is generally not necessary to install a screw cassette. The concrete process is as follows, hold screwdriver handle portion 1 with the hand, aim at the screw that needs the dismantlement with the lower terminal of the tool bit sleeve 3 of screwdriver, make the nut of screw prop open four clamping pieces of tool bit sleeve 3 hard, then use the screwdriver to take out the screw rotation, four clamping pieces have the clamping action to the screw that takes out and place it and drop. Or the screw is disassembled by using the bit sleeve 3 with the screw jaw clamp 7, the specific process is that the screwdriver handle part 1 is held by hand, the lower end head of the bit sleeve 3 of the screwdriver is aligned to the screw to be disassembled, the screwdriver is pushed downwards, the convex part 2-1 on the bit part 2 of the screwdriver can jack up the upper part of the screw jaw clamp 7 so as to open the jaw of the screw jaw clamp 7, the lower end of the bit part 2 of the screwdriver is inserted into the screw groove to rotate the handle part 1 of the screwdriver, the disassembled screw can slowly protrude, due to the acting force of the pressure spring, the tool bit sleeve 3 cannot be jacked up, only the tool bit part 2 of the screwdriver can slowly retreat into the sleeve, and when the bulge part 2-1 of the tool bit part 2 does not have pressure on the screw jaw clamp 7, the screw jaw clamp 7 automatically restores to the original position and just clamps the screw which is just dismounted. The screws can then be removed from the screw access ports. When the screw is unloaded, the screw enters the cutter head cavity and is clamped by the jaw clamp to be easily taken out.

The screwdriver disclosed by the invention is reasonable in structural design, and the sleeve assembly of the tool bit sleeve and the sliding sleeve is arranged, so that the problem that time and labor are wasted in installation and disassembly due to falling of screws which often occur when workers install and disassemble the screws can be effectively solved. The invention can save the operation time, improve the working efficiency and has good use performance.

The invention has the advantages of safety, reliability, simple and quick operation, quick application, low manufacturing cost and suitability for large-area popularization and use.

The screw loading box is arranged, so that the mounting of the screw is facilitated, particularly the mounting of a smaller screw is facilitated, the problems that the smaller screw frequently falls off and the hand is stabbed when being mounted are solved, and the convenience and the safety of the screwdriver are further improved.

Claims

1. A screwdriver comprising a screwdriver having a handle portion (1) and a body portion (2), characterized in that: also comprises a sleeve component provided with a cutter head sleeve (3) and a sliding sleeve (4); one end of the tool bit sleeve (3) is a screw inlet and outlet end, and the other end is a sleeved end provided with a first clamping part (3-1) protruding outwards from the surface; the screw inlet and outlet ends of the tool bit sleeve (3) are conical shells with screw inlet and outlet openings formed in the side surfaces; one end of the sliding sleeve (4) is fixed with the lower end of the handle part (1), the other end of the sliding sleeve is provided with a second clamping stop part (4-1) which protrudes inwards, and a first pressure spring (5) is arranged in the sliding sleeve (4); the sleeving end of the tool bit sleeve (3) is sleeved in the sliding sleeve (4) and the first clamping part (3-1) is positioned at the inner side of the second clamping part (4-1) of the sliding sleeve (4); the inlet and the outlet of the screw are a plurality of open slots (6) arranged on the conical shell; four open slots (6) are oppositely arranged; a pair of screw clamping pliers (7) are fixedly arranged in the conical shell at the inlet and outlet ends of the screw, and the screw clamping pliers (7) arranged in pairs are fixed at the positions of the two open grooves (6) which are oppositely arranged; the lower part of the cutter body part (2) is provided with a bulge part (2-1) for controlling the opening and closing of the screw jaw pliers (7); the screw jaw pliers (7) are a pair of steel sheets, clamping openings are formed in the end parts of the steel sheets, the middle parts of the steel sheets are provided with inwards-protruding clamp protruding parts (7-1), the clamp protruding parts (7-1) are formed by sinking a V-shaped groove from one side to protruding the other side, and the clamp protruding parts (7-1) of the two screw jaw pliers (7) protrude inwards oppositely; the screw loading box (8) supplies screws into the tool bit sleeve (3) through the screw inlet and the screw outlet; the screw filling box (8) comprises a connecting sleeve (8-1) sleeved with the tool bit sleeve (3) and an opening box (8-2) used for placing screws, a second pressure spring (9) used for pushing the screws is arranged on the inner side surface of the opening box (8-2), and a screw outlet of the opening box (8-2) is arranged corresponding to a screw inlet and a screw outlet of the tool bit sleeve (3); a corrugated belt (10) for conveying screws is further arranged in the opening box (8-2), and the end part of the corrugated belt (10) positioned at the screw outlet is arranged corresponding to the screw inlet and the screw outlet of the cutter head sleeve (3); two ends of the inner side of the corrugated belt (10) are provided with rotating wheels (11) for driving the corrugated belt (10) to rotate around; the side surface of a connecting sleeve (8-1) of the screw filling box (8) is provided with an installation positioning groove (8-3) for fixing with the tool bit sleeve (3), and the outer side surface of the tool bit sleeve (3) is provided with a positioning screw (12) matched with the installation positioning groove (8-3).

2. The screwdriver as recited in claim 1, wherein: the sleeving end of the tool bit sleeve (3) and the sliding sleeve (4) is provided with a pressure spring sleeving section (3-2) with the diameter smaller than the inner diameter of the pressure spring I (5), and the pressure spring I (5) is sleeved into the pressure spring sleeving section (3-2).

3. The screwdriver as recited in claim 2, wherein: the length of the pressure spring sleeving section (3-2) is 3-6 cm.

4. The screwdriver as recited in claim 1, wherein: the lower end of the handle part (1) is provided with a thread section (1-1) connected with the sliding sleeve (4), and the sliding sleeve (4) is connected with the lower end of the handle part (1) through threads.