CN116619281A

CN116619281A - Claw type screwdriver

Info

Publication number: CN116619281A
Application number: CN202310681705.3A
Authority: CN
Inventors: 张晓峰; 王发庆; 田桂萍; 尉礼辉; 刘伟; 吴俊�; 邱天; 李露艳
Original assignee: Huaneng Jingmen Thermal Power Co Ltd
Current assignee: Huaneng Jingmen Thermal Power Co Ltd
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2023-08-22

Abstract

The application relates to the technical field of assembly tools for mechanical assembly, and discloses a claw type screwdriver, which comprises: a screwdriver body; the claw type clamping mechanism is arranged on the screwdriver main body. The claw clamping assembly includes: the first sleeve is sleeved on the outer surface of the screwdriver rod; the rigid claw is fixedly connected with the first sleeve; the pushing block is fixedly connected with the outer surface of the first sleeve; the second sleeve is sleeved on the outer surface of the first sleeve; a pushing track is arranged on the second sleeve in a penetrating way and is clamped with the pushing block; one end of the spring is fixedly connected with the side wall of the pushing track, and the other end of the spring is fixedly connected with the side wall of the pushing block. On the basis of a common screwdriver, a first slidable sleeve is arranged, a compression return spring is arranged in the first slidable sleeve, the rigid claw extends out through pushing the first compression spring of the sleeve to grasp the screw, the screw is propped against the screwdriver blade by means of spring return resilience force, and at the moment, the screw can be conveniently installed and fixed at an expected position, and the screw can be conveniently assembled in a returning way under a small screw or an environment with a narrow operation space.

Description

Claw type screwdriver

Technical Field

The application belongs to the technical field of assembly tools for mechanical assembly, and particularly relates to a claw type screwdriver.

Background

Screwdrivers are a common tool used to turn screws into place, typically having a thin wedge head that is inserted into a slot or recess in the screw head. Screwdrivers are tools, either manual or powered, for screwing (installing) and unscrewing (removing) screws. A typical simple screwdriver has a handle and a shaft that terminates in a tip that a user places into the screw head prior to turning the handle. The shaft is typically made of a stiff steel to resist bending or twisting. The tip may be hardened to resist wear, may be treated with a dark tip coating to improve visual contrast between the tip and the screw, and may be ridged or otherwise treated to achieve additional "grip" effects. The screwdrivers are classified by their tips, and their shapes are adapted to the driving surfaces (grooves, recesses, notches, etc.) on the corresponding screw heads. Proper use requires that the tip of the screwdriver engage the head of a screw of the same size and type as the driver tip. The handle is typically wood, metal or plastic, typically hexagonal, square or oval in cross-section, to enhance grip and prevent rolling when the tool is lowered.

In daily life, the screw driver is widely used, and needs to be used in places with screws, such as trains, planes, toys, turners and the like. Usually, in the screw fastening process, a screwdriver is often required to hold the screw by one hand or screw a part of the screw into the screw first and then screw the screw by the screwdriver, but in some narrow and long spaces, hands cannot extend into the screw, the screw is assembled back in a troublesome manner, because the space is small and the screw cannot be assisted by extending, the screwdriver is inconvenient to use, tweezers are required to send the screw into a threaded hole, or the screw is adhered to the screwdriver by using an adhesive, firstly, the adhesion is not firm, secondly, the adhesive can pollute the screw, the pollution is also required to be removed, some manufacturers produce the magnetic screwdriver, the magnetic screwdriver can be used for holding the screw and then mounting the screw, but in order to avoid the fact that the magnetization of mechanical parts cannot be normally used due to magnetism in some high-precision product production, a large number of non-magnetized stainless steel hexagonal screws are used, the magnetic screwdriver cannot be used, and some screws are non-metal, and even the magnetic screwdriver is useless. At this time, a special tool is urgently needed, which brings convenience to us.

Disclosure of Invention

The present application is directed to a claw type screwdriver for solving at least one of the above-mentioned problems.

In order to solve the technical problems, the specific technical scheme of the application is as follows:

in some embodiments of the present application, there is provided a jaw screwdriver including:

a screwdriver body;

the claw type clamping mechanism is arranged on the screwdriver main body, can clamp the screw and limit the screw to the working end of the screwdriver main body, so that the screw does not fall off in the screwing process.

The screwdriver body can be a common screwdriver, the claw type clamping mechanism can be arranged on the screwdriver body and can be welded, bonded or riveted, and the claw type clamping mechanism can clamp the screw according to the specific situation. The screw is abutted to the cutter head, so that the screw can be conveniently reinstalled in a narrow environment or under inconvenient conditions without being held by hands.

Preferably, in a preferred embodiment of the above-mentioned one jaw-type screwdriver, the screwdriver body includes:

the screwdriver handle is provided with a mounting groove at one end;

the screw driver rod is provided with one end which is arranged in the mounting groove and fixedly connected with the screw driver handle;

the screwdriver bit is arranged at the other end of the screwdriver rod and is of an integrated structure with the screwdriver rod.

The claw type clamping mechanism is sleeved outside the screwdriver rod, the connecting end of the claw type clamping mechanism is connected to the corresponding end of the screwdriver handle, and the clamping end corresponds to the screwdriver head.

Preferably, in a preferred embodiment of the above-mentioned one jaw screwdriver, the jaw clamping assembly includes:

the first sleeve is sleeved on the outer surface of the screwdriver rod and is in sliding connection with the outer surface of the screwdriver rod;

the rigid claws are arranged at one end of the sleeve I, which is close to the screwdriver head, and are fixedly connected with the sleeve I to form a clamping structure together;

the pushing block is arranged on the outer surface of the sleeve and fixedly connected with the outer surface of the sleeve;

the second sleeve is sleeved on the outer surface of the first sleeve and is in sliding connection with the outer surface of the first sleeve, and one end of the second sleeve is fixedly connected with the screwdriver handle;

a pushing track is arranged on the second sleeve in a penetrating way, and the pushing block penetrates through the pushing track and can slide along the pushing track;

and one end of the spring is fixedly connected with the side wall of the pushing track, which is close to the screwdriver head, and the other end of the spring is fixedly connected with the corresponding side wall of the pushing block.

Preferably, in a preferred embodiment of the above-mentioned one jaw-type screwdriver, the rigid jaw includes:

one end of the connecting arm is connected to one end of the first sleeve close to the screwdriver head and is fixedly connected with the first sleeve;

and the clamping part is connected to the other end of the connecting arm and is of an integrated structure with the connecting arm.

Preferably, in a preferred embodiment of the above claw type screwdriver, the four rigid claws are provided in pairs opposite to each other at one end of the sleeve near the screwdriver bit.

When the screw is clamped in pairs, the screw is provided with opposite force, and the four rigid claws are arranged, so that the screw is clamped more stably, the screw cannot be displaced during installation, the clamping screws are arranged in pairs, the four rigid claws are opposite, the clamping screws are firmer, and the screw is not easy to fall off or deviate in the installation process.

Preferably, in a preferred embodiment of the above claw type screwdriver, the first sleeve has an inner diameter larger than the diameter of the screwdriver rod, and the first sleeve has an outer diameter smaller than the inner diameter of the second sleeve.

Preferably, in a preferred embodiment of the above claw screwdriver, the pushing block is located on the opposite side of the pushing track to the spring when the spring is in a relaxed state, and the rigid claw is just retracted into the second sleeve.

Preferably, in a preferred embodiment of the above claw type screwdriver, the method for using the claw type screwdriver is as follows:

pushing the pushing block, compressing the spring, and enabling the rigid claw to extend out of the sleeve II and expand;

step two, clamping the clamping part on the screw to enable the screw to be abutted against the screwdriver head;

and thirdly, loosening the pushing block, and enabling the screw to be firmly abutted on the screwdriver head under the action of the reset resilience force of the spring.

Compared with the prior art, the application has the beneficial effects that: on the basis of a common screwdriver, a first slidable sleeve is arranged, a compression reset spring is arranged in the first slidable sleeve, the first slidable sleeve is compressed by pushing a pushing block, a rigid claw extends out through the second sleeve to grasp a screw, the screw is propped against a screwdriver bit by means of spring reset resilience, at the moment, the screw can be conveniently installed and fixed at an expected position, the problem that in a narrow long and narrow space, the hand cannot stretch in, the screw is troublesome to assemble, because the space is small, the problem that the hand cannot stretch is auxiliary can be solved, the screw can be conveniently assembled in a small screw or narrow operating space, the screw clamping part can clamp screws of different materials and types through a claw type clamping component, and compared with a screwdriver rod magnetic screw, the universality is better. The claw type screwdriver can solve the problem that a magnetic screwdriver cannot be used in the production of some high-precision products, and can clamp nonmetallic screws without magnetic force.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of the connection of a rigid jaw to a first sleeve in an embodiment of the application;

FIG. 2 is a schematic view of a second sleeve according to an embodiment of the present application;

FIG. 3 is a schematic view of a screwdriver body according to an embodiment of the present application;

FIG. 4 is a schematic view of the assembled claw-type clamping assembly and screwdriver body according to the embodiment of the present application;

FIG. 5 is a schematic view of the pushing out of a rigid pawl according to an embodiment of the present application;

FIG. 6 is a schematic view of a rigid jaw clamping screw according to an embodiment of the present application;

FIG. 7 is a schematic perspective view of the rigid pawl according to the embodiment of the present application after being retracted;

FIG. 8 is a schematic perspective view of the rigid jaw according to the embodiment of the application;

fig. 9 is a schematic perspective view of a rigid jaw clamping screw according to an embodiment of the application.

In the figure:

1. a screwdriver body; 2. a claw-type clamping mechanism;

11. a screwdriver handle; 12. a screwdriver rod; 13. a screwdriver bit;

21. a first sleeve; 22. a rigid jaw; 23. a pushing block; 24. a second sleeve; 25. pushing the rail; 26. a spring;

221. a connecting arm; 222. and a clamping part.

Detailed Description

The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The present application will be described in further detail with reference to the accompanying drawings for a better understanding of the objects, structures and functions of the present application.

Referring to fig. 1 to 9, a claw type screwdriver describing an embodiment of the present application includes:

a screwdriver body 1;

the claw type clamping mechanism 2 is arranged on the screwdriver main body 1, can clamp the screw and limits the screw to the working end of the screwdriver main body 1, so that the screw does not fall off in the screwing process.

The screwdriver body 1 may be a common screwdriver, the claw type clamping mechanism 2 may be mounted on the screwdriver body 1, and the claw type clamping mechanism 2 may be welded, bonded or riveted, and the claw type clamping mechanism 2 can clamp the screw as the case may be. The screw is abutted to the cutter head, so that the screw can be conveniently reinstalled in a narrow environment or under inconvenient conditions without being held by hands.

To further optimize the above technical solution, the screwdriver body 1 comprises:

the screwdriver handle 11, one end of the screwdriver handle 11 is provided with a mounting groove;

the screwdriver rod 12, one end of the screwdriver rod 12 is arranged in the mounting groove and fixedly connected with the screwdriver handle 11;

a screwdriver bit 13, the screwdriver bit 13 is arranged at the other end of the screwdriver bar 12, and is of an integrated structure with the screwdriver bar 12.

The claw-type clamping mechanism 2 is sleeved outside the screwdriver rod 12, the connecting end of the claw-type clamping mechanism is connected to the corresponding end of the screwdriver handle 11, and the clamping end corresponds to the screwdriver head 13.

To further optimize the above technical solution, referring to fig. 1-2, the claw clamping assembly 2 comprises:

the first sleeve 21 is sleeved on the outer surface of the screwdriver rod 12 and is in sliding connection with the outer surface of the screwdriver rod 12;

a rigid claw 22, wherein the rigid claw 22 is arranged at one end of the sleeve I21, which is close to the screwdriver bit 13, and the rigid claw 22 is fixedly connected with the sleeve I21;

the pushing block 23 is arranged on the outer surface of the first sleeve 21 and fixedly connected with the outer surface of the first sleeve 21;

the second sleeve 24 is sleeved on the outer surface of the first sleeve 21 and is in sliding connection with the outer surface of the first sleeve 21, and one end of the second sleeve 24 is fixedly connected with the screwdriver handle 11;

the second sleeve 24 is provided with a pushing track 25 in a penetrating manner, and the pushing block 23 penetrates through the pushing track 25 and can slide along the pushing track 25;

and one end of the spring 26 is fixedly connected with the side wall of the pushing track 25, which is close to the screwdriver bit 13, and the other end of the spring 26 is fixedly connected with the side wall of the corresponding pushing block 23.

When the screw is clamped, the pushing block 23 is pushed first, so that the pushing block 23 slides along the pushing track 25, the spring 26 is compressed, the sleeve one 21 slides between the screw cutter bar 12 and the sleeve two 24, the rigid claw 22 is driven to extend out of the sleeve two 24, the pushing block 23 is of a T-shaped structure, the pushing block 23 is clamped in the pushing track 25, displacement of the sleeve one 21 cannot be caused during pushing, the pushing block 23 cannot be pushed into the sleeve two 24 by the pushing block 23, and the pushing block is designed into the T-shaped structure, so that the situation is avoided. The first sleeve 21 and the second sleeve 24 are coaxial with the screwdriver rod after being installed, and the second sleeve 24 and the screwdriver handle 11 can be welded, bonded or riveted, and the specific situation can be determined according to the situation; the rigid claw 22 and the first sleeve 21 may be welded, bonded or riveted, as the case may be, and the rigid claw 22 may be mounted to the front end surface of the first sleeve 21, but is not limited thereto, and the rigid claw 22 may be mounted to the inner cylindrical surface or the outer cylindrical surface of the first sleeve 21, as the case may be.

To further optimize the solution described above, referring to fig. 1, the rigid jaw 22 comprises:

a connecting arm 221, wherein one end of the connecting arm 221 is connected to one end of the first sleeve 21, which is close to the screwdriver bit 13, and is fixedly connected with the first sleeve 21;

the clamping part 222, the clamping part 222 is connected to the other end of the connecting arm 221, and is of an integral structure with the connecting arm 221.

It should be noted that, the connecting arm 221 is used for connecting the clamping part 222 and the first sleeve 21, the connecting arm 221 and the clamping part 222 are of an integral structure, the rigid claw 22 has elasticity, can adapt to screws of different types, clamps the screws of different types, the clamping part 222 turns inwards, clamps the screws more conveniently, the screws cannot fall off, clamps the screws more firmly, the rigid claw 22 clamps the screws through the claw type clamping assembly 2, the clamping part 222 can clamp the screws of different materials and types, and compared with the magnetic attraction of the screws through the cutter bar, the universality is better.

To further optimize the solution described above, four rigid jaws 22 are provided, the four rigid jaws 22 being arranged opposite each other at the end of sleeve one 21 near screwdriver bit 13.

When the screws are clamped in pairs, opposite force is provided for the screws, and four rigid claws 22 are arranged, so that the screw clamping is more stable, the screws cannot be displaced during installation, the clamping screws are arranged in pairs and are firmer, and the screws are not easy to fall off or deviate in the installation process.

It should be noted that, when the rigid claw 22 does not extend completely to the second sleeve 24, the outer surface of the rigid claw 22 abuts against the inner surface of the second sleeve 24, the second sleeve 24 provides a partial clamping force for the rigid claw 22, so that the screw clamping is more stable, and when the rigid claw 22 extends completely to the second sleeve 24, the rigid claw 22 can provide a stable clamping force for the screw through the four rigid claws 22 arranged opposite to each other.

To further optimize the above solution, the inner diameter of the first sleeve 21 is larger than the diameter of the screwdriver rod 12, and the outer diameter of the first sleeve 21 is smaller than the inner diameter of the second sleeve 24.

It should be noted that, the inner diameter and the outer diameter of the first sleeve 21 are set such that the inner diameter of the first sleeve 21 is larger than the diameter of the screwdriver rod 12, and the outer diameter of the first sleeve 21 is smaller than the inner diameter of the second sleeve 24, so that the first sleeve 22 can slide freely between the second sleeve 24 and the screwdriver rod 12, the first sleeve 21 can drive the rigid claw 22 to extend and retract freely when the pushing block 23 is pushed, the situation that sliding is blocked and unsmooth is avoided, and the first sleeve 21 cannot be displaced when the pushing block 23 is pushed under the T-shaped design.

To further optimize the solution described above, referring to fig. 3 and 6, when the spring 26 is in a relaxed state, the pusher shoe 23 is positioned on the opposite side of the pusher shoe 25 from the spring 26, and the rigid jaw 22 is retracted into the second sleeve 24.

It should be noted that, when the claw type screwdriver is not used, the spring 26 is in a relaxed state, i.e. the spring 26 is not compressed because the pushing block 23 is pushed by people, the pushing block 23 is located on the opposite side of the pushing rail 25 connected to the spring 26, at this time, the rigid claw 22 is just retracted into the second sleeve 24, the distance from the end of the rigid claw 22 to the end of the pushing block is equal to or smaller than the distance from the end of the second sleeve 24 to the side wall of the pushing rail 25, which is far away from the screwdriver head 13, so that the rigid claw can be retracted into the second sleeve 24 when the screwdriver is not used, the spring 26 always generates a pushing force on the pushing block 23 under the action of the elastic force, or the spring 26 is just in a normal state when the pushing block 23 is located on the opposite side of the pushing rail 25 connected to the spring 26, and the spring 26 will be compressed to generate the elastic force as long as the pushing block 23 generates displacement.

In order to further optimize the technical scheme, the application method of the claw type screwdriver comprises the following steps:

step one, pushing the pushing block 23, compressing the spring 26, so that the rigid claw 22 extends out of the sleeve II 24 and opens;

step two, clamping the clamping part 222 on the screw to enable the screw to be abutted against the screwdriver head 13;

step three, the pushing block 23 is loosened, and the screw is firmly abutted against the screwdriver bit 13 under the action of the reset resilience force of the spring 26.

It should be noted that, pushing the pushing block 23 to slide the sleeve one 21 between the sleeve two 24 and the screwdriver rod 12 along the pushing track 25, so that the rigid claw 22 stretches out of the sleeve two 24 and expands, at this time, the spring is compressed to generate elastic force, the screw is clamped at the clamping portion 222, pushing force of the hand to the pushing block 23 is reduced, the pushing block 23 is moved to the opposite side of the pushing track 25 connected to the spring 26 under the action of the elastic force of the spring 26 until the screw abuts against the screwdriver head 13, the pushing block 23 is loosened, the screw is firmly abutted against the screwdriver head 13 under the action of the reset resilience of the spring 26, when the rigid claw 22 does not fully stretch out of the sleeve two 24, the outer surface of the rigid claw 22 abuts against the inner surface of the sleeve two 24, the sleeve two 24 provides partial clamping force for the rigid claw 22, so that the screw clamping is more stable, and when the rigid claw 22 fully stretches out of the sleeve two 24, the rigid claw 22 can also provide stable clamping force for the screw through four rigid claws 22 arranged in pairs.

On the basis of a common screwdriver, the claw-type clamping mechanism 2 is arranged, the sleeve I21 and the sleeve II 24 are coaxial with a screwdriver rod after being arranged, and the sleeve II 24 and the screwdriver handle 11 can be welded, adhered or riveted, and the specific situation can be determined according to the situation; the rigid claw 22 and the first sleeve 21 may be welded, bonded or riveted, as the case may be, and the rigid claw 22 may be mounted to the front end surface of the first sleeve 21, but is not limited thereto, and the rigid claw 22 may be mounted to the inner cylindrical surface or the outer cylindrical surface of the first sleeve 21, as the case may be. The sliding sleeve I21 is configured, the compression return spring 26 is arranged in the sliding sleeve I21, the pushing block 23 is pushed to enable the sliding sleeve I21 to compress the spring 26, the rigid claw 22 extends out through the sleeve II 24 to grasp a screw, the screw is propped against the screw knife edge 13 by means of the return resilience force of the spring 26, the screw can be conveniently installed and fixed at an expected position, the problem that the screw cannot be inserted into a narrow long and narrow space due to the fact that the screw cannot be assembled by hand is avoided, the problem that the screw cannot be assembled by hand is troublesome due to small space, the screw can be conveniently assembled by hand in a returning mode under the environment with small space or small operation space, the screw clamping part 222 clamps the screw through the claw type clamping assembly 2, and the claw type clamping assembly 2 can clamp screws with different materials and types. The claw type screwdriver can solve the problem that a magnetic screwdriver cannot be used in the production of some high-precision products, and can clamp nonmetallic screws without magnetic force.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A claw-type screwdriver, comprising:

a screwdriver body (1);

the claw type clamping mechanism (2) is arranged on the screwdriver main body (1) and can clamp the screw and limit the screw to the working end of the screwdriver main body (1), so that the screw does not fall off in the screwing process.

2. A claw screwdriver according to claim 1, wherein the screwdriver body (1) comprises:

a screwdriver handle (11), wherein one end of the screwdriver handle (11) is provided with a mounting groove;

the screwdriver rod (12) is arranged in the mounting groove at one end of the screwdriver rod (12) and is fixedly connected with the screwdriver handle (11);

a screwdriver bit (13), wherein the screwdriver bit (13) is arranged at the other end of the screwdriver rod (12) and is of an integrated structure with the screwdriver rod (12);

the claw type clamping mechanism (2) is sleeved outside the screwdriver rod (12), the connecting end of the claw type clamping mechanism is connected to the corresponding end of the screwdriver handle (11), and the clamping end corresponds to the screwdriver head (13).

3. A jaw screwdriver according to claim 1, characterized in that the jaw clamping assembly (2) comprises:

the first sleeve (21) is sleeved on the outer surface of the screwdriver rod (12) and is in sliding connection with the outer surface of the screwdriver rod (12);

the rigid claws (22) are arranged, each rigid claw (22) is arranged at one end of the first sleeve (21) close to the screwdriver head (13) and is fixedly connected with the first sleeve (21) to form a clamping structure together;

the pushing block (23) is arranged on the outer surface of the first sleeve (21) and fixedly connected with the outer surface of the first sleeve (21);

the second sleeve (24) is sleeved on the outer surface of the first sleeve (21) and is in sliding connection with the outer surface of the first sleeve (21), one end of the second sleeve (24) is fixedly connected with the screwdriver handle (11), a pushing track (25) is penetrated through the second sleeve (24), and the pushing speed (23) penetrates through the pushing track (25) and can slide along the pushing track (25);

and one end of the spring (26) is fixedly connected with the side wall of the pushing track (25) close to the screwdriver head (13), and the other end of the spring is fixedly connected with the corresponding side wall of the pushing block (23).

4. A jaw screwdriver according to claim 3, wherein said rigid jaw (22) comprises:

a connecting arm (221), wherein one end of the connecting arm (221) is fixedly connected to one end of the first sleeve (21) close to the screwdriver head (13);

and a clamping part (222), wherein the clamping part (222) is connected to the other end of the connecting arm (221) and is of an integrated structure with the connecting arm (221).

5. A jaw-type screwdriver as claimed in claim 4, characterized in that said rigid jaws (22) are provided in four pairs, said four rigid jaws (22) being arranged opposite each other at one end of said sleeve (21) adjacent to said screwdriver bit (13).

6. A claw screwdriver according to claim 3 wherein the inner diameter of the first sleeve (21) is larger than the diameter of the screwdriver shank (12), the outer diameter of the first sleeve (21) being smaller than the inner diameter of the second sleeve (24).

7. A claw screwdriver according to claim 3, wherein the pushing block (23) is located in the pushing track (25) near one end of the screwdriver shank (11) when the spring (26) is in a relaxed state, and the rigid claw (22) is retracted into the sleeve (24) and is in a clamped state.

8. The claw type screwdriver according to claim 1, wherein the claw type screwdriver is used as follows:

step one, pushing the pushing block (23), compressing the spring (26) and enabling the rigid claw (22) to extend out of the sleeve II (24);

step two, clamping the clamping part (222) on the screw, so that the screw is abutted against the screwdriver head (13);

and thirdly, loosening the pushing block (23) to enable the screw to firmly abut against the screwdriver head (13) under the action of the reset resilience force of the spring (26).