CN210139343U - Screwdriver - Google Patents

Abstract

The utility model belongs to the technical field of hand tool technique and specifically relates to a screwdriver is related to. The screwdriver comprises a screwdriver head, a handle and a rotary connecting piece, wherein the screwdriver head and the handle are connected through the rotary connecting piece, the cross shaft comprises a first connecting shaft and a second connecting shaft which are fixedly connected and mutually perpendicular, one ends of the front hinge body and the rear hinge body are respectively and correspondingly connected with the first connecting shaft and the second connecting shaft in a rotary mode, and the other ends of the front hinge body and the rear hinge body are respectively connected with the screwdriver head and the handle; through rotating the connecting piece, can make tool bit and handle buckle certain angle, and twist grip, can transmit the torsion that the handle produced for the tool bit, make the tool bit rotate round self axis, realize revolving soon the fastener, thereby when having the fastener that shelters from to the top to revolve wrong, can pass through the buckling of handle and tool bit, stretch into the top of fastener with the tool bit, the sheltering from the thing of top is avoided to the handle of buckling and is stretched out, thereby the convenience, swiftly has the fastener that shelters from to the top to fasten and dismantle.

Description

Screwdriver

Technical Field

The utility model belongs to the technical field of hand tool technique and specifically relates to a screwdriver is related to.

Background

The bit of the existing screwdriver is fixedly connected with the handle and only can act on a fastener without shielding above; along with the higher complexity of the mechanical structure, more and more fasteners are hidden in the depth of the mechanical structure, the upper parts of the fasteners are shielded by other parts, and when the fasteners are fastened and screwed, other parts above the fasteners need to be detached firstly, so that the construction difficulty is greatly increased, and the construction efficiency is influenced; therefore, a fastening tool is needed, which has a certain flexibility and can be bent at a certain angle, so that a tool bit of the fastening tool can extend into the position of the fastening element.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screwdriver to solve among the prior art screwdriver handle and the unable bending of tool bit to a certain extent, there is the fastener that shelters from to the top to fasten and the technical problem who dismantles in unable convenient, swiftly.

The utility model provides a screwdriver, which comprises a screwdriver head, a handle and a rotary connecting piece; the rotary connecting piece comprises a front hinge body, a rear hinge body and a cross shaft, wherein the cross shaft comprises a first connecting shaft and a second connecting shaft which are perpendicular to each other and fixedly connected; one end of the front hinge body is rotatably connected with the first connecting shaft and can rotate around the axis of the first connecting shaft; one end of the rear hinge body is rotatably connected with the second connecting shaft and can rotate around the axis of the second connecting shaft; the cutter head is connected with one end, far away from the cross shaft, of the front hinge body, and the handle is connected with one end, far away from the cross shaft, of the rear hinge body.

Further, the rotary connecting piece also comprises two ejector rods; the two ejector rods are respectively positioned on two sides of the cross shaft and respectively correspond to the front hinge body and the rear hinge body; blind holes are formed in the end faces of the front hinge body and the rear hinge body, which face one end of the cross shaft, one end of the ejector rod is located in the corresponding blind hole, and the other end of the ejector rod abuts against the middle connecting part of the cross shaft; elastic pieces are arranged in the blind holes on the front hinge body and the rear hinge body respectively, and two ends of each elastic piece are abutted against the bottom wall of the corresponding blind hole and the end face of the corresponding ejector rod in the blind hole.

Furthermore, the edges of the end faces of the two ejector rods facing one end of the cross shaft are arc-shaped.

Furthermore, the inner wall surfaces of the blind holes on the front hinge body and the rear hinge body are respectively provided with a limiting boss, the outer wall of one end, corresponding to the blind hole, of each of the two ejector rods is provided with a clamping portion, and the clamping portions can abut against the corresponding limiting bosses.

Further, still include the intermediate junction pole, the one end of intermediate junction pole with the back hinge body is connected, the other end of intermediate junction pole with the handle is connected.

Furthermore, the rotating connecting piece is arranged between the middle connecting rod and the handle, and the middle connecting rod is connected with the handle through the rotating connecting piece.

Furthermore, the number of the middle connecting rods is a plurality of, and a plurality of any adjacent two of the middle connecting rods are provided with the rotating connecting piece between the middle connecting rods, so that the middle connecting rods are connected in sequence, and any adjacent two of the middle connecting rods can rotate relatively.

Furthermore, two corresponding first connecting lug parts are arranged on the end face of one end, facing the cross shaft, of the front hinge body, and first connecting through holes are formed in the two first connecting lug parts; two corresponding second connecting lug parts are arranged on the end face of one end, facing the cross shaft, of the rear hinge body, and second connecting through holes are formed in the two second connecting lug parts; two ends of the first connecting shaft can penetrate through the two first connecting through holes respectively, and two ends of the second connecting shaft can penetrate through the two second connecting through holes respectively.

Furthermore, a first connecting part is arranged on the end face of one end of the front hinge body, which is far away from the cross shaft, and the end faces of the cutter head and one end of the middle connecting rod, which are connected with the front hinge body, are provided with first grooves matched with the connecting parts;

or the like, or, alternatively,

the end face, far away from the cross shaft, of the front hinge body is provided with the first groove, and the end face, connected with the front hinge body, of the tool bit or the middle connecting rod is provided with a first connecting portion matched with the first groove.

Furthermore, a second groove is formed in the end face of one end, away from the cross shaft, of the rear hinge body, and a second connecting part matched with the second groove is arranged on the end face of one end, connected with the rear hinge body, of the handle and the intermediate connecting rod;

or the like, or, alternatively,

the end face, far away from the cross shaft, of the rear hinge body is provided with the second connecting part, and the end faces, connected with the rear hinge body, of the handle and the intermediate connecting rod are provided with second grooves matched with the second connecting part.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a screwdriver, which comprises a screwdriver head, a handle and a rotary connecting piece, wherein the screwdriver head is connected with the handle through the rotary connecting piece; the rotary connecting piece comprises a front hinge body, a rear hinge body and a cross shaft, the cross shaft comprises a first connecting shaft and a second connecting shaft which are perpendicular to each other and fixedly connected, one end of the front hinge body is rotatably connected with the first connecting shaft, one end of the rear hinge body is rotatably connected with the second connecting shaft, and the front hinge body or the rear hinge body can rotate around the axis direction of the corresponding connecting shaft, so that a certain angle can be formed between the front hinge body and the rear hinge body in a bending mode. The screwdriver has the advantages that the screwdriver head is fixedly connected with one end, far away from the cross shaft, of the front hinge body, and the handle is fixedly connected with one end, far away from the cross shaft, of the rear hinge body, so that the screwdriver head and the handle are rotatably connected together through the rotating connecting piece, and the screwdriver head and the handle can be bent at a certain angle. When the handle and the tool bit are positioned on the same axis, the handle is rotated, so that the torsion of the handle can be transmitted to the tool bit, and the tool bit can rotate around the same axis to complete screwing of the fastener; and when the handle and the tool bit are bent by a certain angle, the handle is connected with the tool bit through the rotating connecting piece, the handle is rotated by rotating the handle around the axis of the handle, the torque force generated by the handle can be transmitted to the tool bit, the tool bit is rotated around the axis of the tool bit, the fastening piece is screwed, and the fastening piece is disassembled or fastened.

Because the bit and the handle of the common screwdriver are fixedly connected and form a straight line, when the fastener with the shielding part above needs to be disassembled or fastened, the space above the fastener is limited, and the common screwdriver cannot be accommodated to vertically act above the fastener; when the screwdriver screws the fastener, the handle can be bent by a certain angle relative to the screwdriver head, the screwdriver head only extends into the position of the fastener and acts on the fastener vertically, and the bent handle can extend out of the shielding object above the handle; then the handle is rotated, so that the handle rotates around the axis of the handle, and the torque force generated by the rotation of the handle is transmitted to the cutter head through rotating the connecting piece, so that the cutter head can rotate around the axis of the cutter head, the fastening or the disassembly of the fastening piece is completed, and the fastening piece with a shielding part above the fastening piece can be fastened and disassembled conveniently and quickly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a screwdriver provided in an embodiment of the present invention in a first state;

fig. 2 is a schematic structural view of the screwdriver provided in the embodiment of the present invention in a second state;

fig. 3 is a schematic structural view of a rotary connector of a screwdriver according to an embodiment of the present invention at a first viewing angle;

fig. 4 is a cross-sectional view of the screwdriver provided by the embodiment of the present invention in a vertical state;

fig. 5 is a sectional view of the screwdriver according to the embodiment of the present invention, showing a bent state of the rotary connection member.

Reference numerals:

1-a cutter head, 2-a handle, 3-a rotating connecting piece, 31-a front hinge body, 32-a rear hinge body, 33-a cross shaft, 34-a top rod, 35-an elastic piece, 36-a first connecting lug part, 37-a second connecting lug part, 38-a first connecting part, 39-a second groove and 4-an intermediate connecting rod.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A screwdriver according to some embodiments of the present application is described below with reference to fig. 1-5.

The present application provides a screwdriver, as shown in fig. 1 and 3 to 5, comprising a screwdriver bit 1, a handle 2 and a turning connection 3; the rotary connecting piece 3 comprises a front hinge body 31, a rear hinge body 32 and a cross shaft 33; the cross shaft 33 comprises a first connecting shaft and a second connecting shaft which are perpendicular to each other and fixedly connected, and one end of the front hinge body 31 is rotatably connected with the first connecting shaft and can rotate around the axis of the first connecting shaft; one end of the rear hinge body 32 is rotatably connected with the second connecting shaft and can rotate around the axis of the second connecting shaft; the cutter head 1 is connected with one end of the front hinge body 31 far away from the cross shaft 33, and the handle 2 is connected with one end of the rear hinge body 32 far away from the cross shaft 33.

The screwdriver comprises a screwdriver head 1, a handle 2 and a rotary connecting piece 3, wherein the screwdriver head 1 is connected with the handle 2 through the rotary connecting piece 3; the rotary connecting piece 3 comprises a front hinge body 31, a rear hinge body 32 and a cross shaft 33, wherein the cross shaft 33 comprises a first connecting shaft and a second connecting shaft which are fixedly connected and are perpendicular to each other, one end of the front hinge body 31 is connected with the first connecting shaft of the cross shaft 33, and the front hinge body 31 can rotate around the axis of the first connecting shaft; one end of the rear hinge body 32 is rotatably connected with a second connecting shaft of the cross shaft 33, and the rear hinge body 32 can rotate around the axis of the second connecting shaft; therefore, the front hinge body 31 and the rear hinge body 32 can be bent to form a certain angle by rotating the front hinge body 31 or the rear hinge body 32 about the axial direction of the connecting shaft corresponding thereto. The screwdriver head 1 is fixedly connected with one end of the front hinge body 31 far away from the cross shaft 33, and the screwdriver handle 2 is fixedly connected with one end of the rear hinge body 32 far away from the cross shaft 33, so that the screwdriver head 1 and the screwdriver handle 2 are connected together through rotating the connecting piece 3, and the screwdriver head 1 and the screwdriver handle 2 can be bent at a certain angle.

When the handle 2 and the tool bit 1 are positioned on the same axis, the handle 2 is rotated to transmit the torque force of the handle 2 to the tool bit 1, so that the tool bit 1 can rotate around the same axis to complete the screwing of the fastener; and when handle 2 and tool bit 1 are buckled certain angle, handle 2 is connected through rotating connecting piece 3 with tool bit 1, and twist grip 2 makes handle 2 rotate round self axis to can transmit the torsion that handle 2 produced for tool bit 1, make tool bit 1 rotate round self axis, thereby realize revolving soon to the fastener, the completion is to the dismantlement or the fastening of fastener.

It should be noted that the rotating connecting piece 3 of the present application can be a universal joint, and the position of the transmission axis direction is changed through the universal joint, so that the torque force of the handle 2 is transmitted to the cutter head 1, and the cutter head 1 can rotate around the axis of the cutter head 1.

Because the bit 1 and the handle 2 of the common screwdriver are fixedly connected and form a straight line, when the fastener with the shielding part above needs to be disassembled or fastened, the space above the fastener is limited, and the common screwdriver cannot be accommodated to vertically act above the fastener; when the screwdriver is used for screwing the fastener, the handle 2 can be bent by a certain angle relative to the screwdriver head 1, only the screwdriver head 1 of the screwdriver extends into the position of the fastener and acts on the fastener vertically, and the bent handle 2 can extend out of a shielding object above the screwdriver head; then the handle 2 is rotated, so that the handle 2 rotates around the axis of the handle, and the torque force generated by rotating the handle 2 is transmitted to the tool bit 1 by rotating the connecting piece 3, so that the tool bit 1 can rotate around the axis direction of the tool bit, the fastening or the dismounting of the fastener is completed, and the fastening and the dismounting of the fastener with the shielding above are conveniently and quickly performed.

In this embodiment, as shown in fig. 3 to 5, the front hinge body 31 and the rear hinge body 32 of the rotary connector 3 are further provided with a push rod 34, respectively, and the bent cutter head 1 and the handle 2 can be restored to the original vertically connected state by the push rod 34 when no external force is applied.

Blind holes are respectively formed in the end faces of the front hinge body 31 and the rear hinge body 32, which face one end of the cross shaft 33, along the respective axial direction, and an elastic piece 35 and a push rod 34 are respectively arranged in the blind holes of the front hinge body 31 and the rear hinge body 32; one end of each of the two ejector rods 34 is located in the corresponding blind hole, and the other end of each of the two ejector rods 34 can abut against two side surfaces of the middle connecting part of the cross shaft 33; the two ends of the elastic element 35 can respectively abut against the bottom wall of the corresponding blind hole and one end of the ejector rod 34 in the blind hole.

Rely on the elasticity of the elastic component 35 that corresponds, the elasticity of elastic component 35 acts on corresponding ejector pin 34, make two ejector pins 34 tightly lean on with cross 33, receive external force when buckling when handle 2 and tool bit 1, the elastic component 35 that is located the blind hole is compressed, and do not have the exogenic action when handle 2 and tool bit 1, under the effect of elastic force, can make tool bit 1 and handle 2 automatic recovery initial vertical connection's state, be convenient for accomodate, deposit. Preferably, the elastic member 35 is a spring.

In this embodiment, as shown in fig. 4 and 5, the edges of the end surfaces of the two push rods 34 facing one end of the cross shaft 33 are arc-shaped, so that when the handle 2 and the cutter head 1 need to be bent for a certain angle, the cross shaft 33 can be bent along the arc of the edge of the push rod 34 of one of the front hinge body 31 or the rear hinge body 32, so that the front hinge body 31 and the rear hinge body 32 can be bent for an angle more easily; when the reset is required, the cross 33 can smoothly return to the initial vertical state along the curvature of the edge under the action of the elastic force of the elastic member 35 without the application of external force.

In this embodiment, as shown in fig. 4 and 5, the inner walls of the blind holes on the front hinge body 31 and the rear hinge body 32 are both provided with a limiting boss, the outer wall of one end of each of the two push rods 34 in the corresponding blind hole is provided with a clamping portion, and the clamping portion of the push rod 34 can abut against the limiting boss in the corresponding blind hole, so as to prevent the push rod 34 from coming out of the corresponding blind hole.

In this embodiment, as shown in fig. 2, the screwdriver further comprises an intermediate connecting rod 4, the intermediate connecting rod 4 is located between the handle 2 and the screwdriver head 1, one end of the intermediate connecting rod 4 is connected with the screwdriver head 1 through the rotating connecting piece 3, and the other end of the intermediate connecting rod 4 is connected with the handle 2, so that the structural length of the screwdriver is prolonged through the intermediate connecting rod 4; when the fastener with the deeper position is screwed, the screwdriver head 1 can reach the fastener with the deeper position by additionally arranging the middle connecting rod 4 with the proper length.

In this embodiment, as shown in fig. 2, when the middle connecting rod 4 is provided between the handle 2 and the cutter head 1, the middle connecting rod 4 is connected to the cutter head 1 by the rotating connecting member 3, so that the middle connecting rod 4 and the cutter head 1 can be bent at a certain angle, and the axial rotation of the handle 2 and the middle connecting rod 4 can be transmitted to the cutter head 1 by the rotating connecting member 3, so that the cutter head 1 rotates along its own axial direction.

Connecting between intermediate junction pole 4 and the handle 2 also can be connected through rotating connecting piece 3, thereby make also can buckle certain angle between intermediate junction pole 4 and the handle 2, thereby realize buckling twice of screwdriver body, can make the screwdriver effect of this application and the more complicated fastener department in position, thereby when revolving the fastener complicated and/or the darker fastener in position, can make the position that the fastener is reachd to tool bit 1 more easily, twist grip 2, rotate the axial rotation of handle 2 through rotating connecting piece 3 and transmit for intermediate junction pole 4 and tool bit 1 in proper order, make intermediate junction pole 4 and tool bit 1 can both rotate along self axis direction, convenient and fast's completion is to the installation and the dismantlement of fastener.

In this embodiment, as shown in fig. 2, a plurality of intermediate connecting rods 4 may be disposed between the handle 2 and the cutter head 1, a rotating connector 3 is disposed between any two intermediate connecting rods 4 of the plurality of intermediate connecting rods 4, and the plurality of intermediate connecting rods 4 are sequentially connected through the rotating connector 3, so that any two adjacent intermediate connecting rods 4 can be bent to form a certain angle; thereby not only further prolonged the structure length of screwdriver through a plurality of intermediate junction pole 4, also made the body of screwdriver simultaneously and can take place to buckle many times to transmit the torsion that the handle 2 rotation produced downwards in proper order for tool bit 1, thereby can install and dismantle the fastener that the position is more complicated, the position degree of depth is darker.

In this embodiment, as shown in fig. 3 to 5, two corresponding first connecting lugs 36 are disposed on an end surface of the front hinge body 31 facing one end of the cross shaft 33, and first connecting through holes are disposed on both the two first connecting lugs 36 and are located on the same axis; both ends of the first coupling shaft of the cross 33 can pass through the first coupling holes on the two first coupling lugs 36, respectively, thereby coupling the front hinge body 31 with the cross 33 and enabling the front hinge body 31 to rotate about the axis of the first coupling shaft.

Similarly, two corresponding second connecting lug parts 37 are arranged on the end surface of the rear hinge body 32 facing the cross shaft 33, second connecting through holes are formed in the two second connecting lug parts 37, and the two second connecting through holes are located on the same axis; both ends of the second connecting shaft of the cross 33 can pass through second connecting holes on the two second connecting ear portions 37, respectively, thereby connecting the rear hinge body 32 with the cross 33 and enabling the rear hinge body 32 to rotate about the axis of the second connecting shaft.

The front hinge body 31 and the rear hinge body 32 can rotate around the axis of the connecting shaft correspondingly connected with the front hinge body 31 and the rear hinge body 32, so that the front hinge body 31 and the rear hinge body 32 can be bent at a certain angle; preferably, the bendable angle range is 0-45 degrees, when the bendable angle is 0 degrees, the front hinge body 31 and the rear hinge body 32 are in a vertical connection state, and the two hinge bodies are positioned on the same axis; the maximum bendable angle is 45 degrees, when the angle is 45 degrees, the connecting ear part on the front hinge body 31 or the rear hinge body 32 is abutted against one end of the hinge body on the opposite side, so that the bending angle between the front hinge body and the rear hinge body does not exceed 45 degrees, and the phenomenon of hysteresis or blockage in the screwing process of a fastener when the bending angle exceeds 45 degrees is avoided.

In this embodiment, as shown in fig. 3, the handle 2, the middle connecting rod 4 and the cutter head 1 are connected through the rotating connecting piece 3, so that the bending between each two can be realized, and the transmission of the torque can also be realized;

wherein the one end that the cross 33 was kept away from to preceding hinge 31 is the link, is provided with first connecting portion 38 on the terminal surface of this link, is provided with the first recess with first connecting portion 38 looks adaptation on the one end terminal surface of the tool bit 1 or the middle connecting rod 4 that are connected with preceding hinge 31, and first connecting portion 38 can insert in the first recess to with first connecting portion 38 interference fit, make tool bit 1 or middle connecting rod 4 and preceding hinge 31 zonulae occludens together.

Or, a first groove is formed on the end face of the connecting end of the front hinge body 31, a first connecting part 38 matched with the first groove is arranged on the end face of one end of the cutter head 1 or the middle connecting rod 4 connected with the front hinge body 31, and then the cutter head 1 or the middle connecting rod 4 and the front hinge body 31 are tightly connected together through the interference fit of the first connecting part 38 and the first groove.

In this embodiment, as shown in fig. 3, an end of the rear hinge body 32 away from the cross shaft 33 is a connecting end, a second connecting portion is disposed on an end surface of the connecting end, a second groove 39 adapted to the second connecting portion is disposed on an end surface of the handle 2 or the intermediate connecting rod 4 connected to the rear hinge body 32, and the second connecting portion can be inserted into the second groove 39 and is in interference fit with the second connecting portion, so that the handle 2 or the intermediate connecting rod 4 and the rear hinge body 32 are tightly connected together.

Or, the end surface of the connecting end of the rear hinge body 32 is provided with a second groove 39, the end surface of one end of the handle 2 or the middle connecting rod 4 connected with the rear hinge body 32 is provided with a second connecting part matched with the second groove 39, and then the handle 2 or the middle connecting rod 4 and the rear hinge body 32 are tightly connected together through the interference fit of the second connecting part and the second groove 39.

It should be noted that the tool bit 1, the handle 2, the connecting rod and the rotating connecting piece 3 are all detachably connected, the connector types are all adapted, the second connecting portion can be inserted into the first groove, and the first connecting portion 38 can also be inserted into the second groove 39; the handle 2 can be directly connected with the cutter head 1, and the handle 2 can be connected with the cutter head 1 through the rotary connecting piece 3; when one or more middle connecting rods 4 are additionally arranged between the handle 2 and the cutter head 1, the handle 2 can be directly connected with a middle connecting pipe at the tail end or connected with the middle connecting pipe through a rotating connecting piece 3.

The cutter head 1 can be replaced into any form so as to adapt to the construction work of different types of fasteners; meanwhile, when the middle connecting rod 4 is used, the middle connecting rod 4 can be replaced by different lengths so as to adapt to the construction of fasteners with different depths.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. The screwdriver is characterized by comprising a screwdriver head, a handle and a rotary connecting piece;

the rotary connecting piece comprises a front hinge body, a rear hinge body and a cross shaft, wherein the cross shaft comprises a first connecting shaft and a second connecting shaft which are perpendicular to each other and fixedly connected; one end of the front hinge body is rotatably connected with the first connecting shaft and can rotate around the axis of the first connecting shaft; one end of the rear hinge body is rotatably connected with the second connecting shaft and can rotate around the axis of the second connecting shaft;

the cutter head is connected with one end, far away from the cross shaft, of the front hinge body, and the handle is connected with one end, far away from the cross shaft, of the rear hinge body.

2. The screwdriver according to claim 1, wherein said rotary connector further comprises two ejector rods, said two ejector rods are respectively located at two sides of said cross shaft and respectively arranged corresponding to said front hinge body and said rear hinge body;

blind holes are formed in the end faces of the front hinge body and the rear hinge body, which face one end of the cross shaft, one end of the ejector rod is located in the corresponding blind hole, and the other end of the ejector rod abuts against the middle connecting part of the cross shaft;

elastic pieces are arranged in the blind holes on the front hinge body and the rear hinge body respectively, and two ends of each elastic piece are abutted against the bottom wall of the corresponding blind hole and the end face of the ejector rod, which is positioned in the corresponding blind hole.

3. The screwdriver as recited in claim 2, wherein the edges of the end surfaces of both of said ejector rods facing one end of said cross-shaft are rounded.

4. The screwdriver according to claim 2, wherein the inner wall surfaces of the blind holes on the front hinge body and the rear hinge body are respectively provided with a limiting boss, the outer wall of one end of each of the two ejector rods in the blind hole is provided with a clamping part, and the clamping parts can abut against the corresponding limiting bosses.

5. The screwdriver as recited in claim 1, further comprising an intermediate connecting rod, one end of said intermediate connecting rod being connected to said rear hinge body and the other end of said intermediate connecting rod being connected to said handle.

6. The screwdriver as recited in claim 5, wherein said rotational connector is disposed between said intermediate connecting rod and said handle, said intermediate connecting rod and said handle being connected by said rotational connector.

7. The screwdriver according to claim 5, wherein the number of the middle connecting rods is plural, and the rotating connecting piece is arranged between any two adjacent middle connecting rods in the plural middle connecting rods, so that the plural middle connecting rods are connected in sequence, and any two adjacent middle connecting rods can rotate relatively.

8. The screwdriver according to claim 1, wherein two corresponding first connecting lug parts are arranged on the end surface of the front hinge body facing the cross shaft, and first connecting through holes are formed in the two first connecting lug parts;

two corresponding second connecting lug parts are arranged on the end face of one end, facing the cross shaft, of the rear hinge body, and second connecting through holes are formed in the two second connecting lug parts;

two ends of the first connecting shaft can penetrate through the two first connecting through holes respectively, and two ends of the second connecting shaft can penetrate through the two second connecting through holes respectively.

9. The screwdriver according to claim 5, wherein a first connecting part is arranged on the end surface of the front hinge body, which is far away from the cross shaft, and a first groove matched with the connecting part is formed on the end surfaces of the screwdriver head and the middle connecting rod, which are connected with the front hinge body;

or the like, or, alternatively,

the end face, far away from the cross shaft, of the front hinge body is provided with the first groove, and the end face, connected with the front hinge body, of the tool bit or the middle connecting rod is provided with the first connecting portion matched with the first groove.

10. The screwdriver according to claim 5, wherein a second groove is formed in an end surface of the rear hinge body, which is far away from the cross shaft, and a second connecting part matched with the second groove is formed in end surfaces of the handle and the middle connecting rod, which are connected with the rear hinge body;

or the like, or, alternatively,

the end face, far away from the cross shaft, of the rear hinge body is provided with the second connecting part, and the end faces, connected with the rear hinge body, of the handle and the intermediate connecting rod are provided with second grooves matched with the second connecting part.

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