CN108214339A - A kind of open and close type hand-held device and its Handheld Division angle regulation method - Google Patents

Abstract

The present invention relates to an opening-and-closing handheld device and a method for adjusting the angle of its hand-held part. The opening-and-closing handheld device includes a first part and a second part; the first part includes a first clamping part and a first hand-held part; The second part includes a second clamping part and a second handle part; the first clamping part and the second clamping part are rotatably connected through a first pin; the first clamping part Opening and closing relative to the second clamping part, the plane where the opening and closing path is located is the opening and closing plane; the first handle part is rotatably connected to the first clamping part; the first handle part The plane where the rotation path is located is the same as or parallel to the opening and closing plane; a locking device is provided at the connection between the first handle part and the first clamping part, which is used to lock or unlock the first handle part and the first clamping part. the first clamping part.

Description

A kind of opening and closing type hand-held device and method for adjusting the angle of the hand-held part thereof

technical field

The invention relates to the technical field of hand-held tools, in particular to an opening-and-closing hand-held device and a method for adjusting the angle of the hand-held part thereof.

Background technique

This article relates to a class of snap-on hand-held devices, including gripping tools and shearing tools, among others. Conventional opening-and-closing handheld devices are generally made by integrating the hand-held part and the clamping part, such as needle-nose pliers and scissors. It is consistent. According to the principle of leverage, in order to achieve the purpose of labor saving, the length of the handle part is usually set to more than 3 times the length of the clamping part.

Under some special application conditions, for example, when the clamped object is large in size, the opening angle of the clamping part and the handle part is also relatively large, and the distance between the ends of the two handle parts will be relatively large after opening. The opening area of the hand is limited. In this case, the user cannot exert force at the ends of the two grips with one hand, and cannot complete the operation smoothly; he can only be forced to exert force at the middle of the two grips, and the torque is relatively short. In this way, the user will be more laborious in use, and it is inconvenient to operate and use.

On the other hand, for the majority of users of the opening-and-closing hand tools, the sizes of their hands are different, and their habits of exerting force are also different. If the relative angle between the hand-held part and the clamping part of the hand-held tool cannot be adjusted in the direction of opening and closing, then, in most cases, the user cannot operate and use the hand-held tool at the most familiar and most convenient angle of exertion.

Therefore, those skilled in the art are devoting themselves to developing a kind of opening-and-closing hand-held tool, the handle part of which can be relatively rotated and locked in position relative to the clamping part in the direction of opening and closing of the clamping part, so that the user can adjust the position according to the position of the hand. The size and the habit of exerting force Adjust the relative angle between the hand-held part and the clamping part of the hand tool in the direction of opening and closing and lock it, so that the user can operate and use the tensioning tool at the most familiar and convenient force angle. Fitting hand tools.

Contents of the invention

In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a split-type handheld device to solve the technical problems existing in the prior art, such as inconvenient operation and use of the split-type handheld device under special application conditions.

In order to solve the above technical problems, the present invention provides a retractable handheld device, which includes a first part and a second part; the first part includes a first clamping part and a first handle part; the second part includes a second The clamping part and the second handle part; the first clamping part and the second clamping part are rotatably connected through the first pin; the first clamping part and the second clamping part The parts are relatively opened and closed, and the plane of the opening and closing path is the opening and closing plane; the first handle part is rotatably connected to the first clamping part; the plane where the rotation path of the first handle part is The opening and closing planes are the same or parallel; a locking device is provided at the connection between the first handle part and the first clamping part for locking or unlocking the first handle part and the first clamping part.

Furthermore, in order to solve the above technical problems, the present invention provides another openable handheld device, which includes a first part and a second part; the first part includes a first clamping part and a first handle part; the second The component includes a second clamping part and a second handle part; the first clamping part and the second clamping part are rotatably connected through a first pin; the first clamping part and the The second clamping part is relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; the first handle part is rotatably connected to the first clamping part; The plane at the position is the same as or parallel to the opening and closing plane; a locking device is provided at the joint between the first handle part and the first clamping part, which is used to lock or unlock the first handle part and the first clamping part. holding department. The second handle part is rotatably connected to the second clamping part; the plane of the rotation path of the second handle part is the same as or parallel to the opening and closing plane; the second handle part A locking device is provided at the connection with the second clamping part for locking or unlocking the second handle part and the second clamping part.

Further, in different embodiments, the locking device includes an extension, a protrusion, and a second pin shaft; the extension is provided at the bottom end of the first clamping part or the second clamping part; the protrusion is provided at the bottom of the first clamping part or the second clamping part; The top end of the first handle or the second handle is inserted into the extension; the second pin passes through the extension and the protrusion; wherein, the protrusion passes through the second pin Articulated to the extension.

Further, in different embodiments, the extension part includes a first mounting plate, a second mounting plate, and an assembly groove; the second mounting plate is disposed opposite to the first mounting plate; the assembly groove is disposed on the between the first mounting plate and the second mounting plate; for inserting the protruding portion; the shape and size of the second mounting plate correspond to the first mounting plate.

Further, in different embodiments, the first mounting plate includes a first mounting hole; the second mounting plate includes a second mounting hole, which is disposed opposite to the first mounting hole; the protrusion includes a third mounting hole; When the protrusion is inserted into the assembly groove, the second pin shaft passes through the first installation hole, the third installation hole and the second installation hole in sequence.

Further, in different implementations, the locking device further includes a first pressing plate, circular serrations, a spline block, a first spring and a nut. The first pressing plate is arranged on the top of the second shaft pin; the annular sawtooth is arranged on the inner side walls of the first installation hole, the third installation hole and the second installation hole; the spline The block is sleeved on the outside of the second shaft pin; two or more first clips are evenly distributed on the outer wall of the spline block, and the first clips are parallel to the second shaft pin; the first spring Sleeved on the outside of the second shaft pin, the top end of the first spring is connected to the bottom of the first pressing plate, and its bottom end is sleeved on the top of the spline block; the nut is threaded to the second The lower end of the axle pin.

Further, in different implementations, each first clip includes a first notch, a first rack, a second notch, and a second rack from top to bottom in sequence; when the button is pressed down, the The first rack meshes with the annular sawtooth in the third mounting hole, and the locking device is in an unlocked state; when the button is released, the first rack engages with the first mounting hole, The annular serrations in the third installation hole are engaged, the second rack is engaged with the annular serrations in the second installation hole, and the locking device is in a locked state.

Further, in different implementations, the length of the first rack is less than the depth of the third mounting hole; the length of the second rack is less than the maximum compression distance of the first spring; the second The length of the notch is greater than the depth of the third installation hole.

Further, in different embodiments, the locking device further includes a button groove and a nut groove, the button groove is arranged on the top of the first mounting plate and above the first mounting hole, for placing the The first pressing plate; the nut groove is arranged at the bottom of the second mounting plate and is located below the second mounting hole for placing the nut.

Further, in different implementations, the locking device further includes an angle mark and a position mark. The angle mark is set on the top of the first mounting plate and is located around the button groove; the angle mark is used to mark the rotation angle of the first handle part relative to the first clamping part; or, It is used to identify the rotation angle of the second handle part relative to the second clamping part. The positioning mark is set on the top of the first handle or the second handle, and is close to one end of the protruding part; the positioning mark points to any angle on the angle mark.

Further, in different embodiments, the locking device further includes a half-circle gear, a limit block, a sliding buckle and a second spring, and the half-circle gear is formed on the first mounting plate and/or the second mounting plate. The end of the plate; the limit block protrudes from the upper surface of the first handle and is close to the protrusion; the limit block is provided with a U-shaped groove, and the opening direction of the U-shaped groove faces the semicircular gear , the bottom of the U-shaped groove is provided with a spring installation groove; the sliding buckle is set in the U-shaped groove; the sliding buckle includes a buckle body, a buckle toggle, a second clip and a second The spring installation column, the shape of the buckle body corresponds to the shape of the bottom of the U-shaped groove, and is perpendicular to the protrusion; the buckle dial is arranged above the buckle body and protrudes from the first handle upper surface. The second clamping strip protrudes from the side wall of the buckle body, and faces one side of the semicircular gear; the second clamping strip is perpendicular to the protrusion, and its length corresponds to that of the buckle body; The second spring installation column is arranged on the side wall of the buckle body, and faces one side of the spring installation groove; the second spring installation column is parallel to the protrusion, and the second spring installation column Located on the same straight line as the spring mounting groove; the second spring is sleeved on the second spring mounting column; one end of the second spring is tangent to the buckle body, and the other end is located at the in the spring mounting groove.

Further, in different implementations, when the buckle button is dialed down, the second clip is separated from the semicircular gears of the first mounting plate and the second mounting plate; the locking The device is in an unlocked state; when the buckle knob is released, the second clamping strip engages with the semicircular gears of the first mounting plate and the second mounting plate; the locking device is in a locked state .

Further, in different implementations, the height of the second clamping strip protruding from the buckle body is smaller than the maximum compression distance of the second spring.

Further, in different embodiments, the locking device includes a circular gear, two mounting bases, a push buckle, a third pin and a third spring. The circular gear protrudes from the upper surface of the first mounting plate; the circular gear is fixed to the first mounting plate, or is integrated with the first mounting plate. The two opposite installation bases protrude from the upper surface of the first handle and are close to the protrusion; the two installation bases are respectively provided with a base pin hole, and the two base pin holes are located on the same straight line . The pressing buckle is arranged between two installation bases, the pressing buckle includes a second pressing plate, a clamping part, and a third clamping strip, and an end of the second pressing plate close to the protruding part is provided with a A pressing plate pin hole is located on the same line as the two base pin holes; the other end is provided with a third spring mounting column, protruding from and perpendicular to the lower surface of the second pressing plate; the clamping part It is provided at one end of the second pressing plate close to the protruding part, and the clamping part forms an included angle of 120-160 degrees with the second pressing plate; the third clamping strip is provided at the clamping part On the top, the third clip protrudes downwards and faces the circular gear. The third pin passes through the pin hole of the pressing plate and the two base pin holes at the same time; the third spring is sleeved outside the third spring mounting column, and one end of the third spring is connected to the The lower surface of the buckle body is tangent, and the other end is tangent to the upper surface of the first handle.

Further, in different embodiments, when the second pressing plate is pressed down, the third clamping bar is separated from the circular gear, and the locking device is in an unlocked state; when the second pressing plate When it is released, the third clip is engaged with the circular gear, and the locking device is in a locked state.

Further, in different embodiments, the locking device includes a first sliding pin, a first fixing pin and a second fixing pin. The first sliding pin is arranged at the connection between the upper part of the first handle and the bottom of the first clamping part; the first fixing pin is arranged at the top of the first handle and the bottom of the first clamping part. The connection at the top of the second handle; the second fixed pin is located at the connection between the upper part of the second handle and the bottom of the second clamping portion; wherein, the first slide pin slidably mounted to the first clamping portion.

Further, in different embodiments, the locking device includes a first sliding pin, a first fixing pin and a second sliding pin. The first sliding pin is arranged at the connection between the upper part of the first handle and the bottom of the first clamping part; the first fixing pin is arranged at the top of the first handle and the bottom of the first clamping part. The connection at the top of the second handle; the second sliding pin is located at the connection between the upper part of the second handle and the bottom of the second clamping part; wherein, the first sliding pin The first clamping part is slidably installed; the second sliding pin shaft is slidably installed on the second clamping part.

Further, in different embodiments, the locking device further includes two or more positioning holes communicating with each other and at least one sliding opening, and the two or more positioning holes communicating with each other are provided in the first clamping part or the The bottom end of the second clamping part; the first sliding pin or the second sliding pin can be slidably installed in the positioning hole; each of the sliding openings is located in two adjacent positioning holes connection between.

Further, in different embodiments, the first sliding pin and/or the second sliding pin sequentially include a third pressing plate, a thin shaft portion, a thick shaft portion, and a pin base connected to each other; The third pressing plate and the pin base protrude from the outside of the first handle and/or the second handle; the diameter of the thin shaft part corresponds to the width of the sliding opening; the thick The diameter of the shaft portion corresponds to the diameter of the positioning hole.

Further, in different embodiments, the locking device further includes one or two linkage plates, one end of which is connected to the first fixed pin, and the other end is connected to the first sliding pin and/or The pin base of the second sliding pin.

Further, in different embodiments, when the third pressing plate is pressed down, the thick shaft part is disengaged from a positioning hole; the locking device is in an unlocked state; the thin shaft part passes through a sliding opening , slide to the next positioning hole; when the third pressing plate is released, the thick shaft part enters the next positioning hole, and the locking device is in a locked state.

Further, in different embodiments, the expandable handheld device further includes an elastic support member whose cross section is an inverted V shape. The elastic support includes a first bracket, a second bracket and an arc corner, one end of the first bracket penetrates and is fixed to the first handle and the first clamping portion; One end passes through and is fixed to the second handle part and the second clamping part, and the other end is connected to the first bracket; the arc corner is located between the first bracket and the second bracket At the joint, the inner surface of the arc corner is tangent to the outer surface of the first fixing pin.

Further, in different embodiments, the first handle or the second handle includes a handle; or, includes a handle and a protective cover, and the protective cover is sheathed on the outside of the handle.

Further, in different embodiments, the said expandable handheld device includes but not limited to clamping tool and cutting tool; said clamping tool includes but not limited to pliers; said cutting tool includes but not limited to scissors.

Another object of the present invention is to provide a method for adjusting the angle of the hand-held part of the opening-and-closing handheld device, which effectively solves the technical problems existing in the prior art, such as inconvenient operation and use of the opening-and-closing handheld device under special application conditions.

In order to solve the above-mentioned technical problems, the present invention provides a method for adjusting the angle of the handle portion of a split-type handheld device, which includes the following steps: unlocking the first handle portion; relative to the first clamping portion, rotating the first The handle portion; locking the first handle portion; wherein, the plane in which the rotation path of the first handle portion is located is the same as or parallel to the opening and closing plane.

In order to solve the above-mentioned technical problems, the present invention also provides a method for adjusting the angle of the hand-held part of the open-close handheld device, which includes the following steps: unlocking the first hand-held part; relative to the first clamping part, rotating the first A handle; lock the first handle; unlock the second handle; rotate the second handle relative to the second clamping portion; lock the second handle; wherein , the plane in which the rotation path of the first handle is located is the same as or parallel to the opening and closing plane; the plane in which the rotation path of the second handle is located is the same as or parallel to the opening and closing plane.

The advantage of the present invention is that it provides an opening-and-closing hand-held device and a method for adjusting the angle of the hand-held part thereof. The user can adjust the hand-held part and the holding part of the hand-held tool in the opening and closing direction according to the size of the hand and the habit of exerting force. The relative angle of the head can be locked and locked, so that the user can operate and use the hand-held tool at the most familiar and convenient force angle.

In some special application conditions, for example, when the clamped object is large in size, the opening angle of the clamping part is relatively large, but the opening angle of the holding part can be adjusted to a suitable position, so that the two holding parts after opening The distance between the ends of the handles can be relatively small, and the user can exert force on the ends of the two handles with one hand to complete the operation smoothly, which is more labor-saving than ordinary opening and closing devices.

The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of an openable handheld device in Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the overall structure of another openable handheld device in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of an exploded structure of a split-type handheld device in Embodiment 1 of the present invention;

Fig. 4 is a schematic structural view of the extension part and the upper part of the protrusion part in Embodiment 1 of the present invention;

Fig. 5 is a schematic structural diagram of the extension part and the lower part of the protruding part in Embodiment 1 of the present invention;

6 is a schematic diagram of the overall structure of the spline block in Embodiment 1 of the present invention;

7 is a schematic cross-sectional structural view of the locking device in the locked state in Embodiment 1 of the present invention;

8 is a schematic cross-sectional structural view of the locking device in the unlocked state in Embodiment 1 of the present invention;

9 is a schematic diagram of the shape of the opening and closing handheld device after the angle of the handle is adjusted in Embodiment 1 of the present invention;

FIG. 10 is a schematic diagram of the overall structure of a split-type handheld device in Embodiment 2 of the present invention;

FIG. 11 is a schematic diagram of an exploded structure of a split-type handheld device in Embodiment 2 of the present invention;

Fig. 12 is a schematic diagram of an exploded structure of the locking device in Embodiment 2 of the present invention;

Fig. 13 is a schematic structural diagram of the locking device in the locked state in Embodiment 2 of the present invention;

Fig. 14 is a schematic structural diagram of a limiting block in Embodiment 2 of the present invention;

Fig. 15 is a schematic diagram of the overall structure of a split-type handheld device in Embodiment 3 of the present invention;

FIG. 16 is a schematic diagram of an exploded structure of a split-type handheld device in Embodiment 3 of the present invention;

Fig. 17 is a schematic diagram of an exploded structure of the locking device in Embodiment 3 of the present invention;

Fig. 18 is a schematic diagram of the overall structure of a split-type handheld device in Embodiment 4 of the present invention;

Fig. 19 is a schematic diagram of an exploded structure of a split-type handheld device in Embodiment 4 of the present invention;

Fig. 20 is a schematic structural diagram of an expandable handheld device in Embodiment 4 of the present invention;

Fig. 21 is a flow chart of a method for adjusting the angle of the hand-held part of the opening-and-closing hand-held device in Embodiment 5 of the present invention;

FIG. 22 is a flow chart of another method for adjusting the angle of the hand-held part of the open-close handheld device according to Embodiment 5 of the present invention.

The components in the figure are marked as follows:

1 first component, 2 second component, 3 first pin shaft, 4 locking device;

11 the first handle part, 12 the first clamping part, 21 the second handle part, 22 the second clamping part;

31 extension, 32 protruding part, 33 second pin shaft;

101 first pressing plate, 102 annular sawtooth, 103 spline block, 104 first spring, 105 nut, 106 button groove, 107 nut groove, 108 angle mark, 109 positioning mark, 110 handle, 111 protective cover;

201 semicircular gear, 202 limit block, 203 sliding buckle, 204 second spring, 205 U-shaped groove, 206 spring installation groove;

301 round gear, 302 mounting base, 303 press buckle, 304 third pin, 305 third spring;

311 first mounting plate, 312 second mounting plate, 313 assembly groove, 314 first mounting hole, 315 second mounting hole, 321 third mounting hole;

401 elastic support, 402 the first sliding pin, 403 the first fixed pin, 404 the second fixed pin, 405 positioning hole, 406 sliding port, 407 linkage plate, 408 ferrule;

1031 the first clip, 1032 the first gap, 1033 the first rack, 1034 the second gap, 1035 the second rack;

2031 buckle body, 2032 buckle toggle, 2033 second clip, 2034 second spring mounting column;

3021, the pin hole of the base, 3031 the second pressing plate, 3032 the clamping part, 3033 the third clamping strip, 3034 the pin hole of the pressing plate, 3035 the third spring mounting column;

4011 first bracket, 4012 second bracket, 4013 arc corner;

4021 third pressing plate, 4022 thin shaft part, 4023 thick shaft part, 4024 pin base.

Detailed ways

The following describes preferred embodiments of the present invention with reference to the accompanying drawings to prove that the present invention can be implemented. This embodiment can fully introduce the present invention to those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

The directional terms mentioned in the present invention, for example, up, down, front, back, left, right, inside, outside, side, top, bottom, top, bottom, end, etc., are only the directions in the accompanying drawings. It is used to explain and illustrate the present invention, but not to limit the protection scope of the present invention.

When certain elements are described as being "on" another element, the element may be placed directly on the other element; there may also be an intermediate element on which the element is placed, And said intermediate part is placed on another part. When a component is described as being "mounted to" or "connected to" another component, both can be understood as being directly "mounted" or "connected" or a component is indirectly "mounted to" or "connected to" through an intermediate component. "Another part.

Example 1

As shown in FIGS. 1-2 , Embodiment 1 provides a foldable handheld device, which includes a first component 1 and a second component 2 .

The first part 1 includes a first handle 11 and a first clamping part 12; the first handle 11 is located at the bottom of the first part 1; the first clamping part 12 is located at the top of the first part 1; the second part 2 includes a second The handle part 21 and the second clamping part 22 ; the second handle part 21 is located at the bottom of the second component 2 ; the second clamping part 22 is located at the top of the second component 2 . The first clamping part 12 and the second clamping part 22 are rotatably connected through the first pin shaft 3; Opening and closing plane; the second clamping part 22 is set opposite to the top end and/or bottom end of the first clamping part 12 ; the second handle part 21 is set opposite to the first handle part 11 .

A technical feature of this embodiment is that, as shown in FIG. 2 , the first handle part 11 is rotatably connected to the first clamping part 12; the plane where the rotation path of the first handle part 11 is located is the same as the opening and closing plane or parallel. A locking device 4 is provided at the connection between the first handle part 11 and the first clamping part 12 for locking or unlocking the first handle part 11 and the first clamping part 12 .

Another technical feature of this embodiment is that the second handle part 21 is rotatably connected to the second clamping part 22; the plane of the rotation path of the second handle part 21 is the same as or parallel to the opening and closing plane. A locking device 4 is provided at the connection between the second handle part 21 and the second clamping part 22 for locking or unlocking the second handle part 21 and the second clamping part 22 .

As shown in FIG. 1 , in this embodiment, the above two technical features may be provided at the same time, or only one of the above two technical features may be provided.

In use of this embodiment, the locking device 4 is originally in a locked state and can be used normally. When the angle of the first handle 11 or the second handle 21 needs to be adjusted, the locking device 4 needs to be unlocked first, and then the first handle 11 or the second handle 21 is relative to the first clamping portion 12 or After the second clamping part 22 rotates to the required angle, lock the locking device 4 again, so that the first handle part 11 and the first clamping part 12 remain relatively fixed, or make the second handle part 21 and the second clamp The holding portion 22 remains relatively fixed for continued use. In this embodiment, before normal use, the angle between the handle part and the clamping part can be adjusted. However, during use, when the two clamping parts are opened and clamped to the object to be clamped, the holding part and the clamping part maintain a locked state, and the two are relatively fixed.

As shown in FIGS. 3-5 , the locking device 4 includes an extension portion 31 , a protruding portion 32 , and a second pin shaft 33 .

The extension part 31 is provided at the bottom of the first clamping part 12, and its cross section is approximately U-shaped. The extension part 31 includes a first mounting plate 311, a second mounting plate 312, and an assembly groove 313. A mounting plate 311 is arranged oppositely, and the assembly groove 313 is arranged between the first mounting plate 311 and the second mounting plate 312; the assembly groove 313 is used to insert the protrusion 32; the second mounting plate 312 and the first mounting plate 311 Corresponding shape and size.

The protruding part 32 is arranged on the top of the first handle part 11, and is inserted into the extension part 31, specifically, inserted into the assembly groove 313; the second pin shaft 33 passes through the extension part 31 and the protruding part 32 at the same time; the protruding part 32 is movably connected to the extension part 31 through a second pin shaft 33 , so that the first handle part 11 can rotate relative to the first clamping part 12 .

The first mounting plate 311 includes a first mounting hole 314 , and the second mounting plate 312 includes a second mounting hole 315 . The second installation hole 315 is disposed opposite to the first installation hole 314 and corresponds to the shape and size of the first installation hole 314 . The protruding portion 32 includes a third mounting hole 321 corresponding in shape and size to the first mounting hole 314 and the second mounting hole 315 . When the protrusion 32 is inserted into the assembly groove 313 , the second pin shaft 33 passes through the first installation hole 314 , the third installation hole 321 and the second installation hole 315 sequentially.

In the present invention, the extension part 31 and the protruding part 32 of the locking device 4 are relatively rotated through the second pin shaft 33 to drive the relative rotation of the handle part and the clamping part.

As shown in FIGS. 6-8 , the locking device 4 further includes a first pressing plate 101 , annular serrations 102 , a spline block 103 , a first spring 104 and a nut 105 .

The first pressing plate 101 is arranged on the top of the second shaft pin 33 , the second shaft pin 33 is perpendicular to the first pressing plate 1011 , and the outer wall of the lower end of the second shaft pin 33 is provided with an external thread for installing the nut 105 .

As shown in FIG. 4 and FIG. 5 , the annular serrations 102 are respectively disposed on inner sidewalls of the first installation hole 314 , the third installation hole 321 and the second installation hole 315 .

As shown in Figure 6-8, the body of the spline block 103 is cylindrical, with a cylindrical cavity inside, which is sleeved on the outside of the slide bar 1012; two or more first clips are evenly distributed on the outer wall of the spline block 103 1031 , the first clamping bar 1031 is parallel to the slide bar 1012 , the cylindrical body of the spline block 103 and the plurality of first clamping bars 1031 together form a gear device, and meshes with the annular sawtooth 102 . Each first clip bar 1031 sequentially includes a first notch 1032 , a first rack 1033 , a second notch 1034 and a second rack 1035 from top to bottom. The length of the first rack 1033 is less than the depth of the third mounting hole 321 ; the length of the second rack 1035 is less than the maximum compression distance of the first spring 104 ; the length of the second notch 1034 is greater than the depth of the third mounting hole 321 . The length settings of these parts can ensure that when the splined block 103 is in the original position, the first handle 11 and the first clamping portion 12 remain relatively fixed (the locking device 4 is in a locked state); when the splined block 103 slides down, the first The handle part 11 is relatively separated from the first clamping part 12 (the locking device 4 is in an unlocked state), so that the first handle part 11 and the first clamping part 12 can rotate relatively.

The first spring 104 is sleeved on the outside of the second pin shaft 33 , the top end of the first spring 104 is connected to the bottom of the first pressing plate 101 , and the bottom end of the first spring 104 is sleeved on the top of the spline block 103 . When the first pressing plate 101 is pressed down, the spline block 103 slides downward; when the first pressing plate 101 is released, under the action of the first spring 104, the spline block 103 can reset and slide upward to original location.

The nut 105 is sleeved on the lower end of the second pin shaft 33, the inner wall of the nut 105 is provided with an internal thread, the nut 105 corresponds to the external thread of the second pin shaft 33, and the nut 105 is threadedly connected with the second pin shaft 33 lower end, so that the first The pressing plate 101 , the splined block 103 and the first spring 104 are combined as a whole and will not be separated from each other.

As shown in Figure 7, under normal conditions, the first spring 104 is in a relaxed state; the plurality of first racks 1033 of the spline block 103 are engaged with the annular serrations 102 in the first mounting hole 314 and the third mounting hole 321 ; A plurality of second racks 1035 are engaged with the annular sawtooth 102 in the second mounting hole 321; the extension part 31 is relatively fixed with the protruding part 32, the locking device 4 remains locked, and the first handle part 11 and the first clamping part 12 remains relatively fixed.

As shown in Figure 8, when the button 101 is pressed down, the first spring 104 is in a compressed state; the first rack 1033 is only engaged with the annular sawtooth in the third mounting hole 321, and is engaged with the first mounting hole 314, The annular serrations in the second mounting hole 315 are completely disengaged, the locking device 4 is unlocked, and adjusted to the unlocked state, the extension part 31 and the protruding part 32 can rotate relative to the second pin shaft, and the first handle part 11 can be rotated relative to the second pin shaft. The first clamping part 12 rotates.

After the rotation is completed, when the first pressing plate 101 is released, as shown in Figure 7, the first spring 104 is in a relaxed state; The second rack 1035 is engaged with the annular sawtooth in the second mounting hole 321; the extension part 31 is relatively fixed with the protruding part 32, the locking device 4 is in a locked state, and the first handle part 11 and the first clamping part 12 remain relatively fixed.

As shown in Fig. 4 and Fig. 5, the locking device 4 also includes a button groove 106 and a nut groove 107, the button groove 106 is arranged on the top of the first mounting plate 311, and is located above the first mounting hole 314, for placing the first pressing plate 1011. The nut slot 107 is disposed at the bottom of the second mounting plate 312 and below the second mounting hole 315 for placing the nut 105 .

As shown in FIG. 4 , in Embodiment 1, the locking device 4 further includes an angle mark 108 and a positioning mark 109 . The angle mark 108 is arranged on the top of the first mounting plate 311 and is located around the button slot 106 ; the angle mark 109 is used to mark the rotation angle of the first handle part 11 relative to the first clamping part 12 . The positioning mark 109 is set on the top of the first handle 11 and close to one end of the protrusion 32 ; the positioning mark 109 points to any angle value on the angle mark 108 . The angle indicator 108 is used in conjunction with the positioning indicator 109, so that the user can know and adjust the deflection angle of the handpiece in real time.

The expandable handheld device of the present invention includes but not limited to clamping tools and cutting tools; the clamping tools include but not limited to pliers; the cutting tools include but not limited to scissors.

As shown in Fig. 1 and Fig. 2, embodiment 1 provides a kind of opening and closing type hand-held device, specifically, it is a kind of needle-nose pliers, the first clamping part 12, the second clamping part 22 are pincer heads, the first The handle part 11 and the second handle part 21 include a handle 110 , and may also include a protective cover 111 , sheathed on the outside of the handle 110 . One handle is fixedly connected to the pliers head, and the connection between the other handle and the pliers head can be rotated in the same direction as the opening and closing direction of the pliers head. .

The technical effect of embodiment 1 is that embodiment 1 includes two handle parts, one or both of which can rotate relative to the clamping part. In some special occasions, such as the situation where the space is too small or the clamping part is too wide, the user can adjust the angle of one or two handles to adjust the distance between the two handles and the operating angle, so that it can be more Easy to operate and use. As shown in Figure 10, relatively speaking, the solution in which the angles of both handles can be adjusted, compared with the solution in which the angle of a single handle can be adjusted, has a larger range of adjustable angles, and the distance between the two handles can be adjusted Larger and more widely used.

Example 2

As shown in Figures 10-14, Embodiment 2 provides another open-close type handheld device, specifically, a needle-nose pliers, including most of the technical solutions in Embodiment 1, and its locking device 4 includes an extension 31, The structures, functions and principles of the protruding portion 32 and the second pin shaft 33 are the same as those in the embodiment, and will not be repeated here. In addition, compared with the first embodiment, the opening-and-closing handheld device described in the second embodiment has a different technical feature in that the locking device 4 further includes a semicircular gear 201 , a limit block 202 , a sliding buckle 203 and a second spring 204 .

As shown in FIG. 13 and FIG. 14 , the semicircular gear 201 is formed at the end of the first mounting plate 311 and/or the second mounting plate 312 . Generally speaking, as long as the half-circle gear 201 is arranged at the end of one mounting plate, the sliding buckle 203 can be engaged with the half-circle gear 201 to play a role of position locking. If the other end of the mounting plate is also provided with a semi-circular gear 201, it cannot be directly combined with the sliding buckle 203 to play a locking role, but it can make the assembly and replacement of parts more convenient.

If both handle parts are rotatably connected to the clamping part, the two handle parts and the two clamping parts are not integrally designed, but assembled with each other. If there is only a half-circle gear 201 at the end of one mounting plate, then the two handles can only be fixedly mounted on a specific clamping portion, and the left and right handles have inconsistent shapes, and the two cannot be replaced. For the convenience of production and assembly, and also for the convenience of maintenance and replacement of parts, a semicircular gear 201 can be arranged at the ends of the first mounting plate 311 and the second mounting plate 312 respectively.

The limiting block 202 protrudes from the upper surface of the first handle 11 or the second handle 21 and is close to the protrusion 32 , specifically, the limiting block 202 protrudes from the upper surface of the handle. The limiting block 202 is provided with a U-shaped groove 205 , the opening direction of the U-shaped groove 205 faces the semicircular gear 201 , and the bottom of the U-shaped groove 205 is provided with a spring installation groove 206 for installing the second spring 2034 .

The sliding buckle 203 is disposed in the U-shaped groove 205 , and the sliding buckle 203 includes a buckle body 2031 , a buckle toggle 2032 , a second clamping bar 2033 , and a second spring mounting column 2034 . The shape of the buckle body 2031 corresponds to the shape of the bottom of the U-shaped groove 205 , and is perpendicular to the protruding portion 32 . The second clamping strip 2033 protrudes from the side wall of the buckle body 2031 and faces one side of the semicircular gear 201. The second clamping strip 2033 is perpendicular to the protruding part 32, and its length is corresponding to the buckle body 2031, which can be used to snap into the Semi-circular gear 201. The height of the second clip 2033 protruding from the buckle body 2031 is smaller than the maximum compression distance of the second spring 2034. When the buckle toggle 2032 is pushed down, the second spring 2034 is compressed, and the second clip 2033 can be fully retracted. Returning to the U-shaped groove 205, the extension part 31 and the protruding part 32 can rotate, thereby driving the handle part and the support part to rotate relative to each other. The second spring installation post 2034 is disposed on the side wall of the buckle body 2031 and faces to one side of the spring installation slot 206 . The second spring mounting column 2034 is parallel to the protrusion 32 , and the second spring mounting column 2034 is located on the same line as the spring mounting groove 206 , and can be used for installing the second spring 204 .

The second spring 204 is sleeved on the second spring mounting column 2034; one end of the second spring 204 is tangent to the buckle body 2031, and the other end is located in the spring mounting groove 206, and the sliding buckle 203 can be in the U-shaped groove 205 Sliding back and forth, the second spring 204 can assist the sliding buckle 203 to reset.

In this embodiment, under normal conditions, the second spring 204 is in a relaxed state during work; the second clamping strip 2033 is snapped into the semicircular gear 201, and the locking device 4 remains locked, and the handle 11/21 can be connected with the clamping portion 12/21. 22 remained relatively fixed.

When the buckle knob 2032 is pushed down, the second spring 204 is in a compressed state; the second clip 2033 is retracted to the U-shaped groove 205, disengaged from the semicircular gear 201, the locking device 4 is unlocked, and adjusted to the unlocked state , the handle part 11/21 can rotate relative to the clamping part 12/22, that is, the first handle part 11 rotates relative to the first clamping part 12; or, the second handle part 21 rotates relative to the second clamping part 22 turns.

After the rotation is completed, the buckle toggle 2032 is released, and the second spring 204 is in a relaxed state again; the second clip bar 2033 is engaged with the semicircular gear 201 of the first mounting plate 311 and the second mounting plate 312, and the locking device 4 is restored And keep the locked state, the handle part 11/21 can keep relatively fixed with the clamping part 12/22.

The technical effect of embodiment 2 is that embodiment 2 includes two handle parts, one or both of which can rotate relative to the clamping part. In some special occasions, such as the situation where the space is too small or the clamping part is too wide, the user can adjust the angle of one or two handles to adjust the distance between the two handles and the operating angle, so that it can be more Easy to operate and use. Relatively speaking, the solution in which the angles of the two handles can be adjusted has a larger range of adjustable angles, and the adjustable distance between the two handles is larger than that in which the angle of a single handle can be adjusted. Compared with embodiment 1, the component structure in embodiment 2 is simpler, the processing cost is relatively lower, the use is convenient, and the application is more extensive.

Example 3

As shown in Figures 15-17, Embodiment 3 provides another open-close type handheld device, specifically, a needle-nose pliers, including most of the technical solutions in Embodiment 1, and its locking device 4 includes an extension 31, The structures, functions and principles of the protruding portion 32 and the second pin shaft 33 are the same as those in the embodiment, and will not be repeated here. In addition, compared with Embodiment 1, the opening-and-closing handheld device described in Embodiment 3 has a different technical feature in that: the locking device 4 includes a circular gear 301, two opposite mounting bases 302, a push buckle 303, a third pin Shaft 304, third spring 305.

The circular gear 301 protrudes from the upper surface of the first mounting plate 311 ; the circular gear 301 is fixed to the first mounting plate 311 , or is integrated with the first mounting plate 311 .

Two opposite installation bases 302 protrude from the upper surface of the first handle 11 and/or the second handle 21 and are close to the protrusion 32; the two installation bases 302 are respectively provided with a base pin hole 3021, two The base pin holes 3021 are located on the same straight line.

The push buckle 303 is disposed between the two installation bases 302 , and the push buckle 303 includes a second pressing plate 3031 , a buckling portion 3032 , and a third buckle 3033 . One end of the second pressing plate 3031 near the protrusion 32 is provided with a pressing plate pin hole 3034, which is located on the same straight line as the two base pin holes 3021; the other end is provided with a third spring mounting post 3035, protruding from and perpendicular to on the lower surface of the second pressing plate 3031 . The clamping part 3032 is provided at one end of the second pressing plate 3031 close to the protruding part 32, and the clamping part 3032 and the second pressing plate 3031 form an included angle of 120-160 degrees; the third clamping bar 3033 is provided at the top of the clamping part 3032, The third clamping strip 3033 protrudes downwards and faces the circular gear 301 .

The third pin shaft 304 passes through the pin shaft hole 3034 of the pressing plate and the two base pin shaft holes 3021 at the same time.

The third spring 305 is sheathed on the outside of the third spring mounting column 3035 , one end of the third spring 305 is tangent to the lower surface of the second pressing plate 3031 , and the other end is tangent to the upper surface of the handle portion 11 , 21 .

In this embodiment, under normal conditions, the third spring 305 is in a relaxed state during work; the third clip 3033 is snapped into the circular gear 301, and the locking device 4 remains locked, and the handle 11/21 can be connected with the clamping portion 12 The /22 remains relatively fixed.

When the second pressing plate 3031 is pressed down, the third spring 305 is in a compressed state; the third clamping bar 3033 is lifted up to disengage from the circular gear 301, the locking device 4 is unlocked and adjusted to the unlocked state, and the handle 11 /21 can rotate relative to the clamping part 12 / 22 , that is, the first handle part 11 rotates relative to the first clamping part 12 ; or, the second handle part 21 rotates relative to the second clamping part 22 .

After the rotation is completed, the second pressing plate 3031 is released, and the third spring 305 is in a relaxed state again; the third clip bar 3033 is engaged with the circular gear 301, and the locking device 4 recovers and maintains the locked state, and the handle 11/21 can Keep relatively fixed with the clamping part 12/22.

The technical effect of embodiment 3 is that embodiment 3 includes two handle parts, one or both of which can rotate relative to the clamping part. In some special occasions, such as the situation where the space is too small or the clamping part is too wide, the user can adjust the angle of one or two handles to adjust the distance between the two handles and the operating angle, so that it can be more Easy to operate and use. Relatively speaking, the solution in which the angles of the two handles can be adjusted has a larger range of adjustable angles, and the adjustable distance between the two handles is larger than that in which the angle of a single handle can be adjusted. Compared with embodiment 1, the component structure in embodiment 3 is simpler, the processing cost is relatively lower, the use is convenient, and the application is more extensive.

Example 4

As shown in Figures 18-19, Embodiment 4 provides another open-and-close handheld device, specifically, a pair of scissors, including some technical solutions in Embodiment 1. Compared with Embodiment 1, its different technical features are: The locking device 4 does not include the extension portion 31 , the protruding portion 32 , and the second pin shaft 33 , but includes an elastic support member 401 whose cross section is an inverted V shape. The expandable handheld device of the present invention includes but not limited to clamping tools and cutting tools; the cutting tools include but not limited to scissors.

As shown in FIG. 19 , in one embodiment, the locking device 4 further includes a first sliding pin 402 , a first fixing pin 403 , and a second fixing pin 404 .

The first sliding pin 402 is located at the connection between the top of the first handle 11 and the bottom of the first clamping portion 12; the first fixed pin 403 is located at the top of the first handle 11 and the top of the second handle 21 The joint; the first sliding pin 402 is slidably mounted to the first clamping portion 12 . The second fixing pin 404 is located at the connection between the upper portion of the second handle portion 21 and the bottom end of the second clamping portion 22 .

The elastic supporting member 401 includes a first bracket 4011 , a second bracket 4012 , and an arc corner 4013 . One end of the first bracket 4011 passes through and is fixed to the first handle portion 11 and the first clamping portion 12 , and the other end thereof is connected to the second bracket 4012 . One end of the second bracket 4012 passes through and is fixed to the second handle portion 21 and the second clamping portion 22 , and the other end thereof is connected to the first bracket 4011 . The arc corner 4013 is located at the junction of the first bracket 4011 and the second bracket 4012 , and the inner surface of the arc corner 4013 is tangent to the outer surface of the first fixing pin 403 . The elastic supporting member 401 can assist the separation of the two clamping parts, making it easy to open. In order to keep the two clamping parts closed, a ferrule 408 may also be provided at the bottom of the handle part for fixing the relative positions of the two handle parts when the opening-and-closing handheld device is in a closed state.

When the two clamping parts remain in a relatively static state (the scissors are in a closed state), a fixed pin is provided at the connection between the handle part and the clamping part, so that the handle part and the clamping part cannot rotate relative to each other. Causes the two grips to separate from each other (leaves the scissors open). When the two clamping parts remain in a relatively static state, a sliding pin is arranged at the joint between the handle part and the clamping part, so that the handle part and the clamping part can rotate relative to each other within a certain angle.

In another embodiment, the locking device 4 includes a first sliding pin 402, a first fixing pin 403, and a second sliding pin (not shown), and the second sliding pin is connected to the first sliding pin 402. The structure is the same. The first sliding pin 402 is located at the connection between the top of the first handle 11 and the bottom of the first clamping portion 12; the first fixed pin 403 is located at the top of the first handle 11 and the top of the second handle 21 The joint; the second sliding pin is located at the joint between the upper part of the second handle part 21 and the bottom end of the second clamping part 22 . The first sliding pin 403 is slidably mounted on the first clamping portion 12 ; the second sliding pin is slidably mounted on the second clamping portion 22 . When the two clamping parts remain in a relatively static state, a sliding pin is provided at the connection between the two sets of handle parts and the clamping parts, so that the two sets of handle parts and the clamping parts can rotate relative to each other within a certain angle. The former embodiment has a larger adjustment range.

As shown in Figure 20, the first sliding pin 402 or the second sliding pin (not shown) sequentially includes a third pressing plate 4021 connected to each other, a thin shaft portion 4022, a thick shaft portion 4023, and a pin base 4024; The three pressing plates 4021 and the pin base 4024 protrude from the outside of the first handle 11 or the second handle 21 . As shown in FIG. 19 , the locking device 4 further includes two or more positioning holes 405 communicating with each other and at least one sliding opening 406 . More than two positioning holes 405 communicated with each other are provided at the bottom of the first clamping portion 12 and/or the second clamping portion 22; the first sliding pin 402 and/or the second sliding pin 404 can be slidably mounted to the positioning Inside the hole 405 ; each sliding port 406 is located at the connection between two adjacent positioning holes. The locking device 4 also includes one or two linkage plates 407, one end of which is connected to the first fixed pin 403, and the other end is connected to the pin base 4024 of the first sliding pin 402 and/or the second sliding pin 404 .

Under normal conditions, the thick shaft portion 4023 is located in a positioning hole 405, and the locking device 4 is locked. Since the diameter of the thick shaft portion 4023 corresponds to the diameter of the positioning hole 405, the thick shaft portion 4023 can make the handle 11, 21 is relatively fixed with the clamping parts 12 and 22, and the locking device 4 is in a locked state. When the third pressing plate 4021 is pressed down, the linkage plate 407 is deformed, and the thick shaft portion 4023 is disengaged from a positioning hole 405; the locking device 4 is unlocked and adjusted to an unlocked state. Since the diameter of the thin shaft portion 4022 corresponds to the width of the sliding opening 406, the thin shaft portion 4022 passes through a sliding opening 406 between two positioning holes 405 and slides to the next positioning hole 405, when the third pressing plate 4021 When it is released, the interlocking plate 407 resumes its deformation, the thick shaft portion 4023 enters and snaps into the next positioning hole 405, and the locking device 4 is in the locked state again.

The technical effect of embodiment 4 is that embodiment 4 includes two handle parts, and when the two clamp parts remain relatively stationary, one or both handle parts can rotate relative to the clamp parts, so that one or both of the scissors can be adjusted. The angle of the two handles. In some special occasions, such as the situation that the space is too small or the clamping part is too wide, the user can adjust the angle of one or two handle parts to adjust the distance between the two handle parts and the operating angle, so as to adapt to the The user's hand shape and usage habits can be more convenient to operate and use. Relatively speaking, the solution in which the angles of the two handles can be adjusted has a larger range of adjustable angles, and the adjustable distance between the two handles is larger than that in which the angle of a single handle can be adjusted.

Example 5

As shown in Figure 21, Embodiment 5 provides another method for adjusting the angle of the hand-held portion of a split-type handheld device. The split-type handheld device is any one of Embodiments 1-4, and may specifically include the following steps:

Step S101) Unlocking the first handle; opening the locking device of the first handle in any one of the expandable handheld devices in Embodiments 1-4, so that it changes from a locked state to an unlocked state.

Step S102) Rotate the first handle part within an adjustable range relative to the first clamping part; wherein, the plane of the rotation path of the first handle part is the same as or parallel to the opening and closing plane. In this step, the angle and distance between the two handles can be adjusted so as to adapt to the limitation of the operating space and the user's operating habits. The adjustable range is 0-90 degrees of left or right rotation in Embodiment 1-3, and the angle range limited by a plurality of positioning holes in Embodiment 4, and the specific range is determined by the number of positioning holes.

Step S103) Locking the first handle; readjusting the locking device of the first handle in any one of the opening-and-closing handheld devices in Embodiments 1-4 to a locked state.

Before using the open-close type handheld device, the angle adjustment method of the handle portion described in steps S101)-S103) is used to adjust the angle of the handle portion on one side, so as to change the angle between the handle portion and the clamping portion on one side. Angle, change the distance between the two hand-held parts, so that it can conform to the user's habit of using tools, so that the user's operation can be more labor-saving, so that the opening-and-closing handheld device can be better suitable for various working conditions.

As shown in Figure 22, Embodiment 5 also provides another method for adjusting the angle of the hand-held portion of a split-type handheld device. The split-type handheld device is any one of Embodiments 1-4, and may specifically include the following steps:

Step S201) Unlocking the first handle; opening the locking device of the first handle in any one of the expandable handheld devices in Embodiments 1-4, so that it changes from a locked state to an unlocked state.

Step S202) Relative to the first clamping part, rotate the first handle part within an adjustable range; wherein, the plane where the rotation path of the first handle part is located is the same as or parallel to the opening and closing plane. In this step, the angle and distance between the two handles can be adjusted so as to adapt to the limitation of the operating space and the user's operating habits. The adjustable range is 0-90 degrees of left or right rotation in Embodiment 1-3, and the angle range limited by a plurality of positioning holes in Embodiment 4, and the specific range is determined by the number of positioning holes.

Step S203) Locking the first handle; readjusting the locking device of the first handle in any one of the expandable handheld devices in Embodiments 1-4 to a locked state.

Step S204) Unlocking the second hand-held part; opening the locking device of the second hand-held part in any one of the expandable hand-held devices in Embodiments 1-4, so that it changes from a locked state to an unlocked state.

Step S205) Rotate the second handle part within an adjustable range relative to the second clamping part; wherein, the plane where the rotation path of the second handle part is located is the same as the opening and closing plane or parallel. In this step, the angle and distance between the two handles can be adjusted so as to adapt to the limitation of the operating space and the user's operating habits. The adjustable range is 0-90 degrees of left or right rotation in Embodiment 1-3, and the angle range limited by a plurality of positioning holes in Embodiment 4, and the specific range is determined by the number of positioning holes.

Step S206) Locking the second handle; re-adjust the locking device of the second handle in any one of the openable hand-held devices in Embodiments 1-4 to a locked state.

Before using the open-close type handheld device, use the angle adjustment method of the handle part described in steps S201)-S206) to perform angle adjustment processing on the handle parts on both sides to change the angle between the handle parts and the clamping part on both sides. Angle, change the distance between the two hand-held parts, so as to conform to the user's usage habits, so that the user's operation can be more labor-saving, so that the open-close handheld device can be better suitable for various working conditions.

The advantage of the present invention is that it provides an opening-and-closing hand-held device and a method for adjusting the angle of the hand-held part thereof. The user can adjust the hand-held part and the holding part of the hand-held tool in the opening and closing direction according to the size of the hand and the habit of exerting force. The relative angle of the head can be locked and locked, so that the user can operate and use the hand-held tool at the most familiar and convenient force angle.

In some special application conditions, for example, when the clamped object is large in size, the opening angle of the clamping part is relatively large, but the opening angle of the holding part can be adjusted to a suitable position, so that the two holding parts after opening The distance between the ends of the handles can be relatively small, and the user can exert force on the ends of the two handles with one hand to complete the operation smoothly, which is more labor-saving than ordinary opening and closing devices.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (26)

1. An openable handheld device, comprising a first part and a second part; The first component includes a first clamping portion and a first handle portion; The second component includes a second clamping portion and a second handle portion; The first clamping part and the second clamping part are rotatably connected through a first pin shaft; The first clamping part and the second clamping part open and close relatively, and the plane where the opening and closing path is located is the opening and closing plane; it is characterized in that, The first handle part is rotatably connected to the first clamping part; The plane where the rotation path of the first handle is located is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the first handle part and the first clamping part, for locking or unlocking the first handle part and the first clamping part. 2. The opening-and-closing handheld device according to claim 1, characterized in that, The second handle part is rotatably connected to the second clamping part; The plane in which the rotation path of the second handle is located is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the second handle part and the second clamping part, for locking or unlocking the second handle part and the second clamping part. 3. The opening-and-closing handheld device according to claim 1 or 2, wherein the locking device comprises An extension part is provided at the bottom end of the first clamping part or the second clamping part; a protruding part, provided at the top end of the first handle part or the second handle part, and inserted into the extension part; a second pin passing through the extension and the protrusion; Wherein, the protruding part is movably connected to the extension part through the second pin shaft. 4. The expandable handheld device according to claim 3, wherein the extension part comprises a first mounting plate; a second mounting plate, which is arranged opposite to the first mounting plate; The assembly groove is arranged between the first mounting plate and the second mounting plate, and is used for inserting the protruding part. 5. The opening-and-closing handheld device according to claim 4, characterized in that, The first mounting plate includes a first mounting hole; The second mounting plate includes a second mounting hole, which is arranged opposite to the first mounting hole; The protrusion includes a third mounting hole; When the protrusion is inserted into the assembly groove, the second pin shaft passes through the first installation hole, the third installation hole and the second installation hole in sequence. 6. The retractable handheld device according to claim 5, wherein the locking device further comprises the first pressing plate is arranged on the top of the second pivot pin; Annular sawtooth, arranged on the inner side walls of the first installation hole, the third installation hole and the second installation hole; The spline block is sleeved on the outside of the second shaft pin; two or more first clips are evenly distributed on the outer wall of the spline block, and the first clips are parallel to the second shaft pin; The first spring is sleeved on the outside of the second shaft pin, the top end of the first spring is connected to the bottom of the first pressing plate, and the bottom end is sleeved on the top of the spline block; A nut is threadedly connected to the lower end of the second shaft pin. 7. The opening-and-closing handheld device according to claim 6, characterized in that, Each first clamping bar sequentially includes a first notch, a first rack, a second notch and a second rack from top to bottom; When the button is pressed down, the first rack meshes with the annular serrations in the third mounting hole, and the locking device is in an unlocked state; When the button is released, the first rack meshes with the annular serrations in the first mounting hole and the third mounting hole, and the second rack meshes with the ring teeth in the second mounting hole. The circular serrations are engaged, and the locking device is locked. 8. The opening-and-closing handheld device according to claim 7, characterized in that, The length of the first rack is less than the depth of the third mounting hole; The length of the second rack is less than the maximum compression distance of the first spring; The length of the second notch is greater than the depth of the third installation hole. 9. The opening-and-closing handheld device according to claim 6, wherein the locking device further comprises a button groove, arranged on the top of the first mounting plate and above the first mounting hole, for placing the first pressing plate; The nut slot is arranged at the bottom of the second mounting plate and is located below the second mounting hole, for placing the nut. 10. The opening-and-closing handheld device according to claim 9, wherein the locking device further comprises An angle mark is arranged on the top of the first mounting plate and is located around the button slot; used to identify the rotation angle of the first handle part relative to the first clamping part; or, used to identify the rotation angle of the second handle part relative to the second clamping part; The positioning mark is arranged on the top of the first handle or the second handle, and is close to one end of the protruding part; the positioning mark points to any angle on the angle mark. 11. The retractable handheld device according to claim 5, wherein the locking device further comprises a semi-circular gear formed at the end of the first mounting plate and/or the second mounting plate; The limit block protrudes from the upper surface of the first handle and is close to the protrusion; the limit block is provided with a U-shaped groove, the opening direction of the U-shaped groove faces the semicircular gear, and the U The bottom of the groove is provided with a spring installation groove; The sliding buckle is arranged in the U-shaped groove; the sliding buckle includes The buckle body has a shape corresponding to the shape of the bottom of the U-shaped groove and is perpendicular to the protrusion; The buckle toggle is arranged above the buckle body and protrudes from the upper surface of the first handle; The second clamping strip protrudes from the side wall of the buckle body and faces one side of the semi-circular gear; the second clamping strip is perpendicular to the protrusion and has a length corresponding to the buckle body; The second spring installation column is arranged on the side wall of the buckle body and faces to the side of the spring installation groove; the second spring installation column is parallel to the protrusion, and the second spring installation column is parallel to the protrusion. The spring mounting grooves are located on the same straight line; The second spring is sheathed on the second spring installation column; one end of the second spring is tangent to the buckle body, and the other end is located in the spring installation groove. 12. The unfoldable handheld device according to claim 11, characterized in that, When the buckle toggle is pushed downward, the second clamping strip is separated from the semicircular gears of the first mounting plate and the second mounting plate; the locking device is in an unlocked state; When the buckle knob is released, the second clamping bar is engaged with the semicircular gears of the first mounting plate and the second mounting plate; the locking device is in a locked state. 13. The expandable handheld device according to claim 12, characterized in that, The height of the second clamping strip protruding from the buckle body is smaller than the maximum compression distance of the second spring. 14. The retractable handheld device according to claim 5, wherein the locking device comprises a circular gear, protruding from the upper surface of the first mounting plate; the circular gear is fixed to the first mounting plate, or is integrated with the first mounting plate; Two opposite installation bases protrude from the upper surface of the first handle and are close to the protrusion; the two installation bases are respectively provided with a base pin hole, and the two base pin holes are located on the same straight line; Press the buckle, set between two installation bases, the press buckle includes The second pressing plate is provided with a pressing plate pin hole at one end close to the protruding part, which is located on the same line as the two base pin holes; the other end is provided with a third spring mounting column, protruding from and perpendicular to the lower surface of the second pressing plate; A clamping part is provided at one end of the second pressing plate close to the protruding part, and the clamping part forms an included angle of 120-160 degrees with the second pressing plate; and The third clamping strip is arranged on the top of the clamping part, the third clamping strip protrudes downwards and faces the circular gear; a third pin passing through the pin hole of the pressing plate and the two pin holes of the base; and The third spring is sheathed on the outside of the third spring mounting column, one end of the third spring is tangent to the lower surface of the push buckle body, and the other end is tangent to the upper surface of the first handle. 15. The expandable handheld device according to claim 14, characterized in that, When the second pressing plate is pressed down, the third clip is disengaged from the circular gear, and the locking device is in an unlocked state; When the second pressing plate is released, the third clip is engaged with the circular gear, and the locking device is in a locked state. 16. The expandable handheld device according to claim 1, characterized in that, The locking device includes The first sliding pin is arranged at the connection between the upper part of the first handle part and the bottom end of the first clamping part; The first fixed pin is arranged at the connection between the top end of the first handle and the top end of the second handle; The second fixing pin is arranged at the connection between the upper part of the second handle part and the bottom end of the second clamping part; Wherein, the first sliding pin is slidably mounted to the first clamping portion. 17. The expandable handheld device according to claim 2, characterized in that, The locking device includes The first sliding pin is arranged at the connection between the upper part of the first handle part and the bottom end of the first clamping part; The first fixed pin is arranged at the connection between the top end of the first handle and the top end of the second handle; The second sliding pin is arranged at the connection between the upper part of the second handle part and the bottom end of the second clamping part; Wherein, the first sliding pin is slidably mounted to the first clamping portion; The second sliding pin is slidably mounted on the second clamping portion. 18. The unfoldable handheld device according to claim 16 or 17, characterized in that, The locking device also includes More than two positioning holes communicating with each other are provided at the bottom of the first clamping part and/or the second clamping part; the first sliding pin and/or the second sliding pin can slide installed in the positioning hole; At least one sliding opening, each sliding opening is arranged at the communication place between two adjacent positioning holes. 19. The unfoldable handheld device according to claim 16 or 17, characterized in that, The first sliding pin or the second sliding pin sequentially includes a third pressing plate connected to each other, a thin shaft part, a thick shaft part, and a pin base; The third pressing plate and the pin base protrude from the outside of the first handle or the second handle; The diameter of the thin shaft portion corresponds to the width of the sliding port; The diameter of the thick shaft portion corresponds to the diameter of the positioning hole. 20. The expandable handheld device according to claim 19, characterized in that, The locking device also includes One or two linkage plates, one end of which is connected to the first fixed pin, and the other end is connected to the pin base of the first sliding pin and/or the second sliding pin. 21. The expandable handheld device according to claim 20, characterized in that, When the third pressing plate is pressed down, the thick shaft part breaks away from a positioning hole; the locking device is in an unlocked state; the thin shaft part passes through a sliding opening and slides to the next positioning hole; When the third pressing plate is released, the thick shaft portion enters the next positioning hole, and the locking device is in a locked state. 22. The unfoldable handheld device according to any one of claims 16-21, further comprising Resilient supports having an inverted V-shape in cross-section; comprising a first bracket, one end of which passes through and is fixed to the first handle portion and the first clamping portion; a second bracket, one end of which penetrates and is fixed to the second handle portion and the second clamping portion, and the other end thereof is connected to the first bracket; The arc corner is located at the junction of the first bracket and the second bracket, and the inner surface of the arc corner is tangent to the outer surface of the first fixing pin. 23. The expandable handheld device according to claim 1 or 2, characterized in that, The first handle or the second handle includes a handle; or, includes a handle and a protective cover, and the protective cover is sheathed on the outside of the handle. 24. The expandable handheld device according to claim 1 or 2, characterized in that, The said split-type hand-held device includes but not limited to clamping tool and cutting tool; The clamping tools include but are not limited to pliers; The cutting tools include but are not limited to scissors. 25. A method for adjusting the angle of the hand-held part of the opening-and-closing handheld device according to claim 1, characterized in that it comprises the following steps: unlocking the first handle; relative to the first clamping portion, rotating the first handle portion; locking the first handle; Wherein, the plane in which the rotation path of the first handle is located is the same as or parallel to the opening and closing plane. 26. A method for adjusting the angle of the hand-held part of the opening-and-closing type hand-held device according to claim 2, characterized in that it comprises the following steps: unlocking the first handle; relative to the first clamping portion, rotating the first handle portion; locking the first handle; unlocking the second handle; relative to the second clamping portion, rotating the second handle portion; locking the second handle; Wherein, the plane where the rotation path of the first handle is located is the same as or parallel to the opening and closing plane; The plane in which the rotation path of the second handle is located is the same as or parallel to the opening and closing plane.