A kind of opening and closing type handheld device and handheld angle adjustment method thereof

Abstract

The present invention relates to an opening and closing type handheld device and a method for adjusting the angle of a handheld part thereof, wherein the opening and closing type handheld device comprises a first component and a second component; the first component comprises a first clamping part and a first handheld part; the second component comprises a second clamping part and a second handheld part; the first clamping part and the second clamping part are rotatably connected via a first pin shaft; the first clamping part and the second clamping part are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; the first handheld part is rotatably connected to the first clamping part; the plane where the rotation path of the first handheld part 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 handheld part and the first clamping part, for locking or unlocking the first handheld part and the first clamping part.

Description

Technical Field

[0001] The present invention relates to the technical field of handheld tools, and in particular to an opening and closing handheld device and a handheld portion angle adjustment method thereof. Background Art

[0002] This article relates to a type of opening and closing handheld device, including a clamping tool and a shearing tool, etc. Conventional opening and closing handheld devices generally integrate a handheld portion and a clamping portion, such as needle-nosed pliers and scissors. In this type of opening and closing device, the opening angles of the two handheld portions and the opening angles of the two clamping portions are consistent. According to the principle of leverage, in order to achieve the purpose of labor saving, the length of the handheld portion is usually set to be more than 3 times the length of the clamping portion.

[0003] Under some special application conditions, for example, when the clamped object is large in size, the opening angles of the clamping part and the hand-holding part are also relatively large, and the distance between the two ends of the hand-holding parts after opening is also relatively large. Since the opening area of ​​the user's hand is limited, in this case, the user cannot exert force at the ends of the two hand-holding parts with one hand and cannot complete the operation smoothly; he can only be forced to exert force in the middle of the two hand-holding parts, and the torque is relatively short. In this way, the user will have more effort in use, and the operation and use will be inconvenient.

[0004] On the other hand, for the majority of users of opening and closing hand tools, their hands are of different sizes and their force application habits are also different. If the relative angle between the grip part and the clamping part of the hand tool cannot be adjusted in the opening and closing direction, then in most cases, the user cannot operate and use the hand tool at the force application angle that is most familiar and convenient to him or her.

[0005] Therefore, technicians in this field are committed to developing an opening and closing handheld tool, whose handholding part can be relatively rotated relative to the clamping part in the opening and closing direction of the clamping part and locked in position, so that the user can adjust the relative angle between the handholding part and the clamping part of the handheld tool in the opening and closing direction and lock it according to the size of his hand and his force habits, so that the user can operate and use the opening and closing handheld tool at the force angle that is most familiar and convenient to him. Summary of the invention

[0006] In view of the above-mentioned defects of the prior art, an object of the present invention is to provide an foldable handheld device to solve the technical problems existing in the prior art such as the inconvenience in operation and use of the foldable handheld device under special application conditions.

[0007] In order to solve the above technical problems, the present invention provides an opening and closing handheld device, including a first component and a second component; the first component includes a first clamping part and a first handheld part; the second component includes a second clamping part and a second handheld part; the first clamping part and the second clamping part are rotatably connected via a first pin shaft; the first clamping part and the second clamping part are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; the first handheld part is rotatably connected to the first clamping part; the plane where the rotation path of the first handheld part 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 handheld part and the first clamping part, which is used to lock or unlock the first handheld part and the first clamping part.

[0008] Further, in order to solve the above technical problems, the present invention provides another opening and closing handheld device, comprising a first component and a second component; the first component comprises a first clamping portion and a first handheld portion; the second component comprises a second clamping portion and a second handheld portion; the first clamping portion and the second clamping portion are rotatably connected by a first pin shaft; the first clamping portion and the second clamping portion are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; the first handheld portion is rotatably connected to the first clamping portion; the plane where the rotation path of the first handheld portion 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 handheld portion and the first clamping portion, which is used to lock or unlock the first handheld portion and the first clamping portion. The second handheld portion is rotatably connected to the second clamping portion; the plane where the rotation path of the second handheld portion 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 handheld portion and the second clamping portion, which is used to lock or unlock the second handheld portion and the second clamping portion.

[0009] Further, in different embodiments, the locking device includes an extension portion, a protrusion, and a second pin; the extension portion is arranged at the bottom end of the first clamping portion or the second clamping portion; the protrusion is arranged at the top end of the first hand-held portion or the second hand-held portion, and is inserted into the extension portion; the second pin passes through the extension portion and the protrusion; wherein the protrusion is movably connected to the extension portion through the second pin.

[0010] Further, in different embodiments, the extension portion includes a first mounting plate, a second mounting plate, and an assembly groove; the second mounting plate 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 to insert the protrusion; the second mounting plate corresponds to the first mounting plate in shape and size.

[0011] Further, in different embodiments, 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 mounting hole, the third mounting hole and the second mounting hole in sequence.

[0012] Furthermore, in different embodiments, the locking device further comprises a first pressing plate, an annular serration, 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 serration is arranged on the inner side walls of the first mounting hole, the third mounting hole and the second mounting hole; the spline block is sleeved on the outer side of the second shaft pin; more than two first clamping strips are evenly distributed on the outer side wall of the spline block, and the first clamping strips are parallel to the second shaft pin; the first spring is sleeved on the outer side 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 thereof is sleeved on the top of the spline block; the nut is threadedly connected to the lower end of the second shaft pin.

[0013] Furthermore, in different embodiments, each first clamping strip comprises, from top to bottom, a first notch, a first rack, a second notch and a second rack; when the button is pressed downward, the first rack engages 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 engages with the annular serrations in the first mounting hole and the third mounting hole, and the second rack engages with the annular serrations in the second mounting hole, and the locking device is in a locked state.

[0014] Further, in different embodiments, 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; and the length of the second notch is greater than the depth of the third mounting hole.

[0015] Furthermore, in different embodiments, the locking device also includes a button slot and a nut slot, the button slot is arranged at 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 below the second mounting hole, for placing the nut.

[0016] Furthermore, in different embodiments, the locking device further includes an angle mark and a positioning mark. The angle mark is disposed on the top of the first mounting plate and is located around the button slot; the angle mark is used to identify the rotation angle of the first hand-held portion relative to the first clamping portion; or, it is used to identify the rotation angle of the second hand-held portion relative to the second clamping portion. The positioning mark is disposed on the top of the first hand-held portion or the second hand-held portion and is close to one end of the protrusion; the positioning mark points to any angle on the angle mark.

[0017] Furthermore, in different embodiments, the locking device also includes a semicircular gear, a limit block, a sliding buckle and a second spring, the semicircular gear is 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 hand-held part and is close to the protrusion; the limit block is provided with a U-shaped groove, the opening direction of the U-shaped groove is toward the semicircular gear, and the bottom of the U-shaped groove is provided with a spring mounting groove; the sliding buckle is arranged in the U-shaped groove; the sliding buckle includes a buckle body, a buckle dial, a second clip and a second spring mounting 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 upper surface of the first hand-held part. 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 the buckle body; the second spring mounting column is arranged on the side wall of the buckle body and faces one side of the spring mounting groove; the second spring mounting column is parallel to the protrusion, and the second spring mounting column and the spring mounting groove are located on the same straight line; 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 of the second spring is located in the spring mounting groove.

[0018] Furthermore, in different embodiments, when the buckle knob is pushed downward, the second clip strip disengages 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 clip strip engages with the semicircular gears of the first mounting plate and the second mounting plate; the locking device is in a locked state.

[0019] Further, in different embodiments, the height of the second clip protruding from the buckle body is less than the maximum compression distance of the second spring.

[0020] Further, in different embodiments, the locking device includes a circular gear, two mounting bases, a pressing 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 integrally arranged with the first mounting plate. The two mounting bases arranged opposite to each other protrude from the upper surface of the first handheld portion and are close to the protruding portion; the two mounting 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 the two mounting bases, and the pressing buckle includes a second pressing plate, a clamping portion, and a third clamping strip. The second pressing plate is provided with a pressing plate pin hole at one end close to the protruding portion, which is located on the same straight line as the two base pin holes; the other end thereof is provided with a third spring mounting column, which protrudes from and is perpendicular to the lower surface of the second pressing plate; the clamping portion is arranged at one end of the second pressing plate close to the protruding portion, and the clamping portion forms an angle of 120 to 160 degrees with the second pressing plate; the third clamping strip is arranged at the top of the clamping portion, and the third clamping strip protrudes downward and faces the circular gear. The third pin shaft passes through the pressing plate pin shaft hole and the two base pin shaft holes at the same time; the third spring is sleeved on the outside of the third spring mounting column, one end of the third spring is tangent to the lower surface of the pressing buckle body, and the other end is tangent to the upper surface of the first hand-held part.

[0021] Further, in different embodiments, when the second pressing plate is pressed downward, the third clamping strip is disengaged from the circular gear, and the locking device is in an unlocked state; when the second pressing plate is released, the third clamping strip is engaged with the circular gear, and the locking device is in a locked state.

[0022] Further, in different embodiments, the locking device includes a first sliding pin, a first fixed pin and a second fixed pin. The first sliding pin is provided at the connection between the upper portion of the first hand-held portion and the bottom end of the first clamping portion; the first fixed pin is provided at the connection between the top end of the first hand-held portion and the top end of the second hand-held portion; the second fixed pin is provided at the connection between the upper portion of the second hand-held portion and the bottom end of the second clamping portion; wherein the first sliding pin can be slidably mounted to the first clamping portion.

[0023] Further, in different embodiments, the locking device includes a first sliding pin, a first fixed pin and a second sliding pin. The first sliding pin is provided at the connection between the upper part of the first hand-held part and the bottom end of the first clamping part; the first fixed pin is provided at the connection between the top end of the first hand-held part and the top end of the second hand-held part; the second sliding pin is provided at the connection between the upper part of the second hand-held part and the bottom end of the second clamping part; wherein the first sliding pin can be slidably mounted to the first clamping part; and the second sliding pin can be slidably mounted to the second clamping part.

[0024] Furthermore, in different embodiments, the locking device also includes two or more positioning holes connected to each other and at least one sliding opening, and the two or more positioning holes connected to each other are arranged at the bottom end of the first clamping part or the second clamping part; the first sliding pin shaft or the second sliding pin shaft can be slidably installed in the positioning hole; each of the sliding openings is arranged at the connecting point between two adjacent positioning holes.

[0025] 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 that are connected to each other; the third pressing plate and the pin base protrude from the outside of the first hand-held portion and / or the second hand-held portion; the diameter of the thin shaft portion corresponds to the width of the sliding port; and the diameter of the thick shaft portion corresponds to the diameter of the positioning hole.

[0026] Furthermore, in different embodiments, the locking device further comprises one or two linkage plates, one end of which is connected to the first fixed pin, and the other end of which is connected to the pin base of the first sliding pin and / or the second sliding pin.

[0027] Further, in different embodiments, when the third pressing plate is pressed downward, the thick shaft portion disengages from a positioning hole; the locking device is in an unlocked state; the thin shaft portion 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.

[0028] Furthermore, in different embodiments, the foldable handheld device further includes an elastic support member, whose cross section is an inverted V-shape. The elastic support member includes a first bracket, a second bracket, and an arc corner, one end of the first bracket penetrates and is fixed to the first handheld portion and the first clamping portion; one end of the second bracket penetrates and is fixed to the second handheld portion and the second clamping portion, and the other end is connected to the first bracket; the arc corner is located at the connection between the first bracket and the second bracket, and the inner side surface of the arc corner is tangent to the outer surface of the first fixing pin.

[0029] Furthermore, in different embodiments, the first hand-held portion or the second hand-held portion includes a handle; or includes a handle and a protective cover, and the protective cover is mounted on the outside of the handle.

[0030] Furthermore, in different embodiments, the opening and closing handheld device includes but is not limited to a clamping tool and a cutting tool; the clamping tool includes but is not limited to pliers; the cutting tool includes but is not limited to scissors.

[0031] Another object of the present invention is to provide a method for adjusting the angle of a handheld portion of an opening and closing handheld device, so as to effectively solve the technical problems existing in the prior art such as the inconvenience in operation and use of the opening and closing handheld device under special application conditions.

[0032] In order to solve the above technical problems, the present invention provides a method for adjusting the angle of a handheld part of an opening and closing handheld device, comprising the following steps: unlocking the first handheld part; rotating the first handheld part relative to the first clamping part; locking the first handheld part; wherein the plane on which the rotation path of the first handheld part lies is the same as or parallel to the opening and closing plane.

[0033] In order to solve the above technical problems, the present invention also provides a method for adjusting the angle of a handheld part of an opening and closing handheld device, comprising the following steps: unlocking the first handheld part; rotating the first handheld part relative to the first clamping part; locking the first handheld part; unlocking the second handheld part; rotating the second handheld part relative to the second clamping part; locking the second handheld part; wherein the plane where the rotation path of the first handheld part is located is the same as or parallel to the opening and closing plane; and the plane where the rotation path of the second handheld part is located is the same as or parallel to the opening and closing plane.

[0034] The advantage of the present invention is that it provides an opening and closing handheld device and a handheld angle adjustment method thereof, so that the user can adjust the relative angle between the handheld part and the clamping part of the handheld tool in the opening and closing direction and lock it according to the size of his hand and his force application habits, so that the user can operate and use the handheld tool at the force application angle that is most familiar and convenient to him.

[0035] Under 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 hand-held part can be adjusted to a suitable position so that the distance between the two ends of the hand-held parts after opening can be relatively small. The user can exert force at the two ends of the hand-held parts with one hand to successfully complete the operation, which is more labor-saving than ordinary opening and closing devices.

[0036] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall structure of an openable and foldable handheld device in Embodiment 1 of the present invention;

[0038] Figure 2 This is a schematic diagram of the overall structure of another foldable handheld device in Embodiment 1 of the present invention;

[0039] Figure 3 This is a schematic diagram of the exploded structure of an foldable handheld device in Embodiment 1 of the present invention;

[0040] Figure 4 It is a schematic structural diagram of the extension portion and the upper portion of the protrusion in Example 1 of the present invention;

[0041] Figure 5 It is a schematic structural diagram of the extension part and the lower part of the protrusion in Example 1 of the present invention;

[0042] Figure 6 This is a schematic diagram of the overall structure of the spline block in Example 1 of the present invention;

[0043] Figure 7 is a schematic cross-sectional structural diagram of the locking device in the locked state in Embodiment 1 of the present invention;

[0044] Figure 8 is a schematic cross-sectional structural diagram of the locking device in the unlocked state in Embodiment 1 of the present invention;

[0045] Fig. 9 This is a schematic diagram of the shape of the foldable handheld device after the angle of the handheld portion is adjusted in Example 1 of the present invention;

[0046] Fig.10 This is a schematic diagram of the overall structure of an openable and closable handheld device in Embodiment 2 of the present invention;

[0047] Fig.11 This is a schematic diagram of the exploded structure of an foldable handheld device in Embodiment 2 of the present invention;

[0048] Fig.12 This is a schematic diagram of the exploded structure of the locking device in Example 2 of the present invention;

[0049] Fig.13 This is a schematic diagram of the structure of the locking device in the locked state in Embodiment 2 of the present invention;

[0050] Fig.14 This is a schematic diagram of the structure of the limit block in Example 2 of the present invention;

[0051] Fig.15 This is a schematic diagram of the overall structure of an openable and foldable handheld device in Embodiment 3 of the present invention;

[0052] Fig.16 This is a schematic diagram of the exploded structure of an foldable handheld device in Embodiment 3 of the present invention;

[0053] Fig.17 This is a schematic diagram of the exploded structure of the locking device in Example 3 of the present invention;

[0054] Fig.18 This is a schematic diagram of the overall structure of an openable and closable handheld device in Embodiment 4 of the present invention;

[0055] Fig.19 This is a schematic diagram of the exploded structure of an foldable handheld device in Embodiment 4 of the present invention;

[0056] Fig. 20 This is a schematic structural diagram of an opening and closing handheld device in Embodiment 4 of the present invention;

[0057] Fig.21 This is a flow chart of a method for adjusting the angle of a handheld portion of an opening and closing handheld device in Embodiment 5 of the present invention;

[0058] Fig. 22 This is a flow chart of another method for adjusting the angle of the hand-held portion of an openable hand-held device in Embodiment 5 of the present invention.

[0059] The parts in the figure are marked as follows:

[0060] 1 first component, 2 second component, 3 first pin shaft, 4 locking device;

[0061] 11 first hand-held part, 12 first clamping part, 21 second hand-held part, 22 second clamping part;

[0062] 31 extension portion, 32 protrusion portion, 33 second pin shaft;

[0063] 101 first pressing plate, 102 annular serrations, 103 spline block, 104 first spring, 105 nut, 106 button slot, 107 nut slot, 108 angle mark, 109 positioning mark, 110 handle, 111 protective cover;

[0064] 201 semicircular gear, 202 limiting block, 203 sliding buckle, 204 second spring, 205 U-shaped groove, 206 spring mounting groove;

[0065] 301 circular gear, 302 mounting base, 303 pressing buckle, 304 third pin shaft, 305 third spring;

[0066] 311 first mounting plate, 312 second mounting plate, 313 assembly groove, 314 first mounting hole, 315 second mounting hole, 321 third mounting hole;

[0067] 401 elastic support member, 402 first sliding pin, 403 first fixed pin, 404 second fixed pin, 405 positioning hole, 406 sliding opening, 407 linkage plate, 408 ferrule;

[0068] 1031 a first clamping strip, 1032 a first notch, 1033 a first rack, 1034 a second notch, 1035 a second rack;

[0069] 2031 a buckle body, 2032 a buckle knob, 2033 a second clip bar, 2034 a second spring mounting column;

[0070] 3021, base pin hole, 3031 second pressing plate, 3032 clamping portion, 3033 third clamping strip, 3034 pressing plate pin hole, 3035 third spring mounting column;

[0071] 4011 first bracket, 4012 second bracket, 4013 arc corner;

[0072] 4021 the third pressing plate, 4022 the thin shaft portion, 4023 the thick shaft portion, 4024 the pin shaft base. DETAILED DESCRIPTION

[0073] The following describes the preferred embodiment of the present invention with reference to the drawings in the specification to prove that the present invention can be implemented. The 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 in the text.

[0074] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference 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 the components is appropriately exaggerated in some places in the drawings.

[0075] The directional terms mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, side, top, bottom, top end, bottom end, end, etc., are only directions in the drawings and are only used to explain and illustrate the present invention, rather than to limit the scope of protection of the present invention.

[0076] When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "mounted on" or "connected to" another component, the two may be understood to be directly "mounted on" or "connected", or one component may be indirectly "mounted on" or "connected to" another component via an intermediate component.

[0077] Example 1

[0078] like Figure 1-2 As shown, Embodiment 1 provides an foldable handheld device, comprising a first component 1 and a second component 2 .

[0079] The first component 1 includes a first hand-held portion 11 and a first clamping portion 12; the first hand-held portion 11 is located at the bottom of the first component 1; the first clamping portion 12 is located at the top of the first component 1; the second component 2 includes a second hand-held portion 21 and a second clamping portion 22; the second hand-held portion 21 is located at the bottom of the second component 2; the second clamping portion 22 is located at the top of the second component 2. The first clamping portion 12 and the second clamping portion 22 are rotatably connected through the first pin 3; the first clamping portion 12 and the second clamping portion 22 are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; the second clamping portion 22 is arranged relative to the top and / or bottom end of the first clamping portion 12; the second hand-held portion 21 is arranged relative to the first hand-held portion 11.

[0080] A technical feature of this embodiment is that Figure 2 As shown, the first hand-held portion 11 is rotatably connected to the first clamping portion 12; the plane where the rotation path of the first hand-held portion 11 is located is the same as or parallel to the opening and closing plane. A locking device 4 is provided at the connection between the first hand-held portion 11 and the first clamping portion 12 for locking or unlocking the first hand-held portion 11 and the first clamping portion 12.

[0081] Another technical feature of this embodiment is that the second hand-held portion 21 is rotatably connected to the second clamping portion 22; the plane where the second hand-held portion 21 rotates is the same as or parallel to the opening and closing plane. A locking device 4 is provided at the connection between the second hand-held portion 21 and the second clamping portion 22 for locking or unlocking the second hand-held portion 21 and the second clamping portion 22.

[0082] like Figure 1 As shown, this embodiment may have both of the above two technical features, or may have only one of the above two technical features.

[0083] In the present embodiment, the locking device 4 is originally in a locked state during use and can be used normally. When it is necessary to adjust the angle of the first hand-held portion 11 or the second hand-held portion 21, it is necessary to first unlock the locking device 4, and then rotate the first hand-held portion 11 or the second hand-held portion 21 to the required angle relative to the first clamping portion 12 or the second clamping portion 22, and then lock the locking device 4, so that the first hand-held portion 11 and the first clamping portion 12 remain relatively fixed, or the second hand-held portion 21 and the second clamping portion 22 remain relatively fixed, so as to continue to use. Before normal use, the present embodiment can adjust the angle between the hand-held portion and the clamping portion. However, during use, when the two clamping portions are opened and clamped to the object to be clamped, the hand-held portion and the clamping portion remain locked, and the two are relatively fixed.

[0084] like Figure 3-5 As shown, the locking device 4 includes an extension portion 31 , a protrusion 32 , and a second pin shaft 33 .

[0085] The extension portion 31 is arranged at the bottom end of the first clamping portion 12, and its cross-section is approximately U-shaped. The extension portion 31 includes a first mounting plate 311, a second mounting plate 312, and an assembly groove 313. The second mounting plate 312 is arranged opposite to the first mounting plate 311, 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 corresponds to the shape and size of the first mounting plate 311.

[0086] The protrusion 32 is arranged at the top of the first hand-held 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 protrusion 32 at the same time; the protrusion 32 is movably connected to the extension part 31 through the second pin shaft 33, so that the first hand-held part 11 can rotate relative to the first clamping part 12.

[0087] 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 mounting hole 315 is arranged opposite to the first mounting hole 314, and corresponds to the shape and size of the first mounting hole 314. The protrusion 32 includes a third mounting hole 321, which corresponds to the shape and size of 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 33 passes through the first mounting hole 314, the third mounting hole 321 and the second mounting hole 315 in sequence.

[0088] In the present invention, the extending portion 31 and the protruding portion 32 of the locking device 4 rotate relative to each other through the second pin shaft 33 to drive the relative rotation of the hand-holding portion and the clamping portion.

[0089] like Figure 6-8As shown, 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 .

[0090] The first pressing plate 101 is disposed on the top of the second shaft pin 33 , and the second shaft pin 33 is perpendicular to the first pressing plate 1011 . An outer wall at the lower end of the second shaft pin 33 is provided with an external thread for mounting a nut 105 .

[0091] like Figure 4 , Figure 5 As shown, the annular serrations 102 are respectively disposed on the inner side walls of the first mounting hole 314 , the third mounting hole 321 and the second mounting hole 315 .

[0092] like Figure 6-8 As shown, the body of the spline block 103 is cylindrical, and a cylindrical cavity is provided therein, which is sleeved on the outside of the slide bar 1012; more than two first clamping strips 1031 are evenly distributed on the outer wall of the spline block 103, and the first clamping strips 1031 are parallel to the slide bar 1012. The cylindrical body of the spline block 103 and the plurality of first clamping strips 1031 together form a gear device, which is meshed with the annular sawtooth 102. Each first clamping strip 1031 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 setting of these components can ensure that when the spline block 103 is in place, the first hand-held part 11 and the first clamping part 12 remain relatively fixed (the locking device 4 is in a locked state); when the spline block 103 slides down, the first hand-held part 11 and the first clamping part 12 are relatively separated (the locking device 4 is in an unlocked state), so that the first hand-held part 11 and the first clamping part 12 can rotate relative to each other.

[0093] The first spring 104 is sleeved on the outside of the second pin shaft 33, the top of the first spring 104 is connected to the bottom of the first pressing plate 101, and the bottom of the first spring 104 is sleeved on the top of the spline block 103. When the first pressing plate 101 is pressed downward, the spline block 103 slides downward; when the first pressing plate 101 is released, the spline block 103 can be reset under the action of the first spring 104 and slide upward to the original position.

[0094] The nut 105 is sleeved on the lower end of the second pin shaft 33, and 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. The nut 105 is threadedly connected to the lower end of the second pin shaft 33, so that the first pressing plate 101, the spline block 103 and the first spring 104 are combined into a whole and will not separate from each other.

[0095] like Figure 7 As shown, in a normal state, the first spring 104 is in a relaxed state; the multiple first racks 1033 of the spline block 103 are meshed with the annular serrations 102 in the first mounting hole 314 and the third mounting hole 321; the multiple second racks 1035 are meshed with the annular serrations 102 in the second mounting hole 321; the extension portion 31 and the protrusion 32 are relatively fixed, the locking device 4 remains in a locked state, and the first hand-held portion 11 and the first clamping portion 12 remain relatively fixed.

[0096] like Figure 8 As shown, when the button 101 is pressed downward, the first spring 104 is in a compressed state; the first rack 1033 is only engaged with the annular serrations in the third mounting hole 321, and is completely disengaged from the annular serrations in the first mounting hole 314 and the second mounting hole 315, the locking device 4 is unlocked and adjusted to an unlocked state, the extension portion 31 and the protrusion 32 can rotate relative to each other with the second pin shaft as the rotation axis, and the first hand-held portion 11 can rotate relative to the first clamping portion 12.

[0097] After the rotation is completed, when the first pressing plate 101 is released, Figure 7 As shown, the first spring 104 is in a relaxed state; the first rack 1033 is meshed with the annular serrations in the first mounting hole 314 and the third mounting hole 321; the second rack 1035 is meshed with the annular serrations in the second mounting hole 321; the extension portion 31 and the protrusion 32 are relatively fixed, the locking device 4 is in a locked state, and the first hand-held portion 11 and the first clamping portion 12 remain relatively fixed.

[0098] like Figure 4 , Figure 5 As shown, the locking device 4 further includes a button slot 106 and a nut slot 107. The button slot 106 is arranged at the top of the first mounting plate 311 and above the first mounting hole 314, and is used to place the first pressing plate 1011. The nut slot 107 is arranged at the bottom of the second mounting plate 312 and below the second mounting hole 315, and is used to place the nut 105.

[0099] like Figure 4 As shown, in embodiment 1, the locking device 4 further includes an angle mark 108 and a positioning mark 109. The angle mark 108 is provided at the top of the first mounting plate 311 and is located around the button slot 106; the angle mark 109 is used to identify the rotation angle of the first hand-held portion 11 relative to the first clamping portion 12. The positioning mark 109 is provided at the top of the first hand-held portion 11 and is close to one end of the protrusion 32; the positioning mark 109 points to any angle value on the angle mark 108. The angle mark 108 and the positioning mark 109 are used in conjunction with each other so that the user can understand and adjust the deflection angle of the hand-held portion in real time.

[0100] The opening and closing handheld device of the present invention includes but is not limited to a clamping tool and a cutting tool; the clamping tool includes but is not limited to pliers; the cutting tool includes but is not limited to scissors.

[0101] like Figure 1 , Figure 2 As shown, embodiment 1 provides an opening and closing handheld device, specifically, a needle-nosed pliers, wherein the first clamping portion 12 and the second clamping portion 22 are pliers heads, and the first handheld portion 11 and the second handheld portion 21 include a handle 110, and may also include a protective cover 111, which is sleeved 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 rotate, and the rotation direction is consistent with the opening and closing direction of the pliers head, and the plane where the rotation path of the handle 110 is located is the same as or parallel to the opening and closing plane of the pliers head.

[0102] The technical effect of embodiment 1 is that embodiment 1 includes two hand-held parts, one or both of which can rotate relative to the clamping part. In some special occasions, such as when the space is too small or the clamping part is too wide, the user can adjust the angle of one or both hand-held parts to adjust the distance and operating angle between the two hand-held parts, so as to make it more convenient to operate and use. Fig.10 As shown, relatively speaking, the solution in which the angles of both hand-held parts can be adjusted has a wider range of adjustable angles, a larger adjustable distance between the two hand-held parts, and a wider application than the solution in which the angle of a single hand-held part can be adjusted.

[0103] Example 2

[0104] like Figure 10-14 As shown, Example 2 provides another opening and closing handheld device, specifically, a pair of needle-nosed pliers, including most of the technical solutions in Example 1, and its locking device 4 includes an extension portion 31, a protrusion 32, and a second pin 33. Its structure, function and principle are the same as those in the embodiment, and are not described in detail here. In addition, the opening and closing handheld device described in Example 2, relative to Example 1, has the following distinguishing technical features: the locking device 4 also includes a semicircular gear 201, a limit block 202, a sliding buckle 203 and a second spring 204.

[0105] like Fig.13 , Fig.14 As shown, 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 semicircular gear 201 is provided at the end of one mounting plate, the sliding buckle 203 can be engaged with the semicircular gear 201 to play a role in locking the position. If the semicircular gear 201 is also provided at the end of the other mounting plate, it cannot be directly combined with the sliding buckle 203 to play a locking role, but it can make the assembly and replacement of the components more convenient.

[0106] If both hand-held parts are rotatably connected to the clamping part, then the two hand-held parts and the two clamping parts are not designed as one body, but are assembled to each other. If only one mounting plate is provided with a semicircular gear 201 at the end, then the two hand-held parts can only be fixedly mounted on a specific clamping part, and the shapes of the left and right hand-held parts are inconsistent, and the two cannot be replaced. In order to facilitate production and assembly, and also to facilitate maintenance and replacement of parts, a semicircular gear 201 can be provided at the end of the first mounting plate 311 and the end of the second mounting plate 312 respectively.

[0107] The stopper 202 protrudes from the upper surface of the first gripping part 11 or the second gripping part 21 and is close to the protrusion 32. Specifically, the stopper 202 protrudes from the upper surface of the handle. The stopper 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.

[0108] The sliding buckle 203 is disposed in the U-shaped groove 205, and includes a buckle body 2031, a buckle knob 2032, a second clamping strip 2033, and a second spring mounting column 2034. The buckle body 2031 has a shape corresponding to the bottom shape of the U-shaped groove 205 and is perpendicular to the protrusion 32. The buckle knob 2032 is disposed above the buckle body 2031 and protrudes from the upper surface of the first hand-held portion 11. 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 protrusion 32, and its length corresponds to that of the buckle body 2031, and can be used to be clamped to the semicircular gear 201. The height of the second clip 2033 protruding from the buckle body 2031 is less than the maximum compression distance of the second spring 2034. When the buckle toggle knob 2032 is pushed downward, the second spring 2034 is compressed, and the second clip 2033 can be completely retracted into the U-shaped groove 205, so that the extension portion 31 and the protrusion 32 can rotate, thereby driving the hand-held portion and the support portion to rotate relative to each other. The second spring installation column 2034 is arranged on the side wall of the buckle body 2031 and faces one side of the spring installation groove 206. The second spring installation column 2034 is parallel to the protrusion 32, and the second spring installation column 2034 and the spring installation groove 206 are located on the same straight line, and can be used to install the second spring 204.

[0109] 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. The sliding buckle 203 can slide back and forth in the U-shaped groove 205, and the second spring 204 can assist the sliding buckle 203 to reset.

[0110] In operation of this embodiment, under normal conditions, the second spring 204 is in a relaxed state; the second clip 2033 is clipped into the semicircular gear 201, the locking device 4 remains in a locked state, and the hand-held portion 11 / 21 can remain relatively fixed with the clamping portion 12 / 22.

[0111] When the buckle knob 2032 is pushed downward, the second spring 204 is in a compressed state; the second clip 2033 retracts to the U-shaped groove 205 and disengages from the semicircular gear 201, the locking device 4 is unlocked and adjusted to an unlocked state, and the hand-held part 11 / 21 can rotate relative to the clamping part 12 / 22, that is, the first hand-held part 11 rotates relative to the first clamping part 12; or, the second hand-held part 21 rotates relative to the second clamping part 22.

[0112] After the rotation is completed, the buckle knob 2032 is released, and the second spring 204 is in a relaxed state again; the second clip 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 maintained in a locked state, and the hand-held part 11 / 21 can remain relatively fixed with the clamping part 12 / 22.

[0113] The technical effect of Example 2 is that Example 2 includes two hand-held parts, one or both of which can rotate relative to the clamping part. In some special occasions, such as when the space is too small or the clamping part is too wide, the user can adjust the angle of one or both hand-held parts to adjust the distance and operating angle between the two hand-held parts so that it can be operated and used more conveniently. Relatively speaking, the scheme in which the angles of both hand-held parts can be adjusted has a larger range of adjustable angles and a larger adjustable distance between the two hand-held parts compared to the scheme in which the angle of a single hand-held part can be adjusted. Compared with Example 1, the component structure in Example 2 is simpler, the processing cost is relatively low, it is easy to use, and has a wider application.

[0114] Example 3

[0115] like Figure 15-17 As shown, Example 3 provides another opening and closing handheld device, specifically, a pair of needle-nosed pliers, including most of the technical solutions in Example 1, and its locking device 4 includes an extension portion 31, a protrusion 32, and a second pin 33. Its structure, function and principle are the same as those in the embodiment, and are not repeated here. In addition, the opening and closing handheld device described in Example 3, relative to Example 1, has the following distinguishing technical features: the locking device 4 includes a circular gear 301, two oppositely arranged mounting bases 302, a pressing buckle 303, a third pin 304, and a third spring 305.

[0116] 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 integrally provided with the first mounting plate 311 .

[0117] Two mounting bases 302 disposed opposite to each other protrude from the upper surface of the first grip portion 11 and / or the second grip portion 21 and are close to the protrusion 32 ; the two mounting bases 302 are respectively provided with a base pin hole 3021 , and the two base pin holes 3021 are located on the same straight line.

[0118] The pressing buckle 303 is arranged between the two mounting bases 302, and comprises a second pressing plate 3031, a clamping portion 3032, and a third clamping strip 3033. A pressing plate pin hole 3034 is provided at one end of the second pressing plate 3031 close to the protruding portion 32, and is located on the same straight line as the two base pin holes 3021; ​​a third spring mounting column 3035 is provided at the other end thereof, protruding from and perpendicular to the lower surface of the second pressing plate 3031. The clamping portion 3032 is arranged at one end of the second pressing plate 3031 close to the protruding portion 32, and the clamping portion 3032 and the second pressing plate 3031 form an angle of 120 to 160 degrees; the third clamping strip 3033 is arranged at the top of the clamping portion 3032, and the third clamping strip 3033 protrudes downward and faces the circular gear 301.

[0119] The third pin shaft 304 passes through the pressing plate pin shaft hole 3034 and the two base pin shaft holes 3021 at the same time.

[0120] The third spring 305 is sleeved 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 of the third spring 305 is tangent to the upper surface of the hand-held parts 11 , 21 .

[0121] In the present embodiment, during operation, under normal conditions, the third spring 305 is in a relaxed state; the third clip 3033 is clipped into the circular gear 301, the locking device 4 remains in a locked state, and the hand-held portion 11 / 21 can remain relatively fixed with the clamping portion 12 / 22.

[0122] When the second pressing plate 3031 is pressed downward, the third spring 305 is in a compressed state; the third clamping strip 3033 is lifted upward and disengaged from the circular gear 301, the locking device 4 is unlocked and adjusted to an unlocked state, and the hand-held part 11 / 21 can rotate relative to the clamping part 12 / 22, that is, the first hand-held part 11 rotates relative to the first clamping part 12; or, the second hand-held part 21 rotates relative to the second clamping part 22.

[0123] 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 clamping strip 3033 is engaged with the circular gear 301, and the locking device 4 is restored and maintained in a locked state, and the hand-held part 11 / 21 can be relatively fixed with the clamping part 12 / 22.

[0124] The technical effect of Example 3 is that Example 3 includes two hand-held parts, one or both of which can rotate relative to the clamping part. In some special occasions, such as when the space is too small or the clamping part is too wide, the user can adjust the angle of one or both hand-held parts to adjust the distance and operating angle between the two hand-held parts so that it can be operated and used more conveniently. Relatively speaking, the scheme in which the angles of both hand-held parts can be adjusted has a larger range of adjustable angles and a larger adjustable distance between the two hand-held parts compared to the scheme in which the angle of a single hand-held part can be adjusted. Compared with Example 1, the component structure in Example 3 is simpler, the processing cost is relatively low, it is easy to use, and has a wider range of applications.

[0125] Example 4

[0126] like Figure 18-19 As shown, Embodiment 4 provides another opening and closing handheld device, specifically, a pair of scissors, including some technical solutions in Embodiment 1. Compared with Embodiment 1, its distinguishing technical features are: the locking device 4 does not include an extension portion 31, a protrusion 32, and a second pin 33, but includes an elastic support member 401, whose cross section is an inverted V-shape. The opening and closing handheld device of the present invention includes but is not limited to a clamping tool and a shearing tool; the shearing tool includes but is not limited to scissors.

[0127] like Fig.19 As shown, in one embodiment, the locking device 4 further includes a first sliding pin 402 , a first fixed pin 403 , and a second fixed pin 404 .

[0128] The first sliding pin 402 is disposed at the connection between the upper portion of the first hand-held portion 11 and the bottom end of the first clamping portion 12; the first fixed pin 403 is disposed at the connection between the top end of the first hand-held portion 11 and the top end of the second hand-held portion 21; the first sliding pin 402 can be slidably mounted to the first clamping portion 12. The second fixed pin 404 is disposed at the connection between the upper portion of the second hand-held portion 21 and the bottom end of the second clamping portion 22.

[0129] The elastic support member 401 includes a first bracket 4011, a second bracket 4012, and an arc corner 4013. One end of the first bracket 4011 penetrates and is fixed to the first handheld 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 penetrates and is fixed to the second handheld 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 connection between the first bracket 4011 and the second bracket 4012, and the inner side surface of the arc corner 4013 is tangent to the outer surface of the first fixed pin 403. The elastic support member 401 can assist the two clamping portions to separate and make it easy to open. In order to keep the two clamping portions closed, a clamping sleeve 408 can also be provided at the bottom of the handheld portion to fix the relative positions of the two handheld portions when the opening and closing handheld device is in a closed state.

[0130] When the two clamping parts are kept relatively still (the scissors are in a closed state), a fixed pin is arranged at the connection between the hand-held part and the clamping part, so that the hand-held part and the clamping part cannot rotate relative to each other. Once the rotation occurs, the two clamping parts will inevitably be separated from each other (making the scissors in an open state). When the two clamping parts are kept relatively still, a sliding pin is arranged at the connection between the hand-held part and the clamping part, so that the hand-held part and the clamping part can rotate relative to each other within a certain angle.

[0131] In another embodiment, the locking device 4 includes a first sliding pin 402, a first fixed pin 403, and a second sliding pin (not shown), wherein the second sliding pin has the same structure as the first sliding pin 402. The first sliding pin 402 is arranged at the connection between the upper part of the first hand-held part 11 and the bottom end of the first clamping part 12; the first fixed pin 403 is arranged at the connection between the top end of the first hand-held part 11 and the top end of the second hand-held part 21; the second sliding pin is arranged at the connection between the upper part of the second hand-held part 21 and the bottom end of the second clamping part 22. The first sliding pin 403 can be slidably mounted to the first clamping part 12; the second sliding pin can be slidably mounted to the second clamping part 22. When the two clamping parts are kept in a relatively static state, a sliding pin is respectively arranged at the connection between the two groups of hand-held parts and the clamping parts, so that the two groups of hand-held parts and the clamping parts can rotate relative to each other within a certain angle, and the adjustment range is larger than that of the previous embodiment.

[0132] like Fig. 20 As shown, the first sliding pin 402 or the second sliding pin (not shown) includes a third pressing plate 4021, a thin shaft portion 4022, a thick shaft portion 4023, and a pin base 4024 which are connected to each other in sequence; the third pressing plate 4021 and the pin base 4024 protrude from the outside of the first hand-held portion 11 or the second hand-held portion 21. Fig.19As shown, the locking device 4 also includes two or more mutually connected positioning holes 405 and at least one sliding opening 406. The two or more mutually connected positioning holes 405 are arranged at the bottom end 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 installed in the positioning holes 405; each sliding opening 406 is arranged 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 of which is connected to the pin base 4024 of the first sliding pin 402 and / or the second sliding pin 404.

[0133] In a normal state, the thick shaft portion 4023 is located in a positioning hole 405, and the locking device 4 is in a locked state. 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 hand-held portion 11, 21 and the clamping portion 12, 22 relatively fixed, and the locking device 4 is in a locked state. When the third pressing plate 4021 is pressed downward, the linkage plate 407 is deformed, and the thick shaft portion 4023 is separated 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 is released, the linkage plate 407 resumes its deformation, and the thick shaft portion 4023 enters and is stuck in the next positioning hole 405, and the locking device 4 is in a locked state again.

[0134] The technical effect of Example 4 is that Example 4 includes two hand-held parts, and when the two clamping parts remain in a relatively static state, one or both hand-held parts can rotate relative to the clamping parts, so that the angle of one or both handles of the scissors can be adjusted. In some special occasions, such as when the space is too small or the clamping parts are too wide, the user can adjust the angle of one or both hand-held parts to adjust the distance and operating angle between the two hand-held parts, so as to adapt to the user's hand shape and usage habits, and can be operated and used more conveniently. Relatively speaking, the solution in which the angles of both hand-held parts can be adjusted has a larger range of adjustable angles and a larger adjustable distance between the two hand-held parts compared to the solution in which the angle of a single hand-held part can be adjusted.

[0135] Example 5

[0136] like Fig.21 As shown, Embodiment 5 provides another method for adjusting the angle of the handheld portion of an foldable handheld device, wherein the foldable handheld device is any one of Embodiments 1-4, and specifically may include the following steps:

[0137] Step S101) Unlocking the first handheld part; opening the locking device of the first handheld part in any one of the foldable handheld devices in Examples 1-4 to change the locked state to the unlocked state.

[0138] Step S102) Rotate the first hand-held part within an adjustable range relative to the first clamping part; wherein the plane where the rotation path of the first hand-held part is located is the same as or parallel to the opening and closing plane. This step can adjust the angle and distance between the two hand-held parts so as to adapt to the limitations of the operating space and the operating habits of the user. The adjustable range is 0-90 degrees to the left or right in Examples 1-3, and is the angle range limited by multiple positioning holes in Example 4, and the specific range is determined by the number of positioning holes.

[0139] Step S103) Locking the first handheld part; re-adjusting the locking device of the first handheld part in any one of the foldable handheld devices in Embodiments 1-4 to a locked state.

[0140] Before using the opening and closing handheld device, the angle of the handheld portion on one side is adjusted using the angle adjustment method of the handheld portion described in steps S101)-S103) to change the angle between the handheld portion on one side and the clamping portion, and change the distance between the two handheld portions, so as to conform to the user's tool usage habits, make the user's operation more labor-saving, and make the opening and closing handheld device better suitable for various working conditions.

[0141] like Fig. 22 As shown, Embodiment 5 also provides another method for adjusting the angle of the handheld portion of an opening and closing handheld device, wherein the opening and closing handheld device is any one of Embodiments 1-4, and specifically may include the following steps:

[0142] Step S201) Unlocking the first handheld part; opening the locking device of the first handheld part in any one of the foldable handheld devices in Examples 1-4 to change the locked state to the unlocked state.

[0143] Step S202) Rotate the first hand-held part within an adjustable range relative to the first clamping part; wherein the plane where the rotation path of the first hand-held part is located is the same as or parallel to the opening and closing plane. This step can adjust the angle and distance between the two hand-held parts so as to adapt to the limitations of the operating space and the operating habits of the user. The adjustable range is 0-90 degrees to the left or right in Examples 1-3, and is the angle range limited by multiple positioning holes in Example 4, and the specific range is determined by the number of positioning holes.

[0144] Step S203) Locking the first handheld part; re-adjusting the locking device of the first handheld part in any one of the foldable handheld devices in Embodiments 1-4 to a locked state.

[0145] Step S204) Unlocking the second handheld part; opening the locking device of the second handheld part in any one of the foldable handheld devices in Examples 1-4 to change the locked state to the unlocked state.

[0146] Step S205) Rotate the second hand-held part within an adjustable range relative to the second clamping part; wherein the plane where the rotation path of the second hand-held part is located is the same as or parallel to the opening and closing plane. This step can adjust the angle and distance between the two hand-held parts so as to adapt to the limitations of the operating space and the operating habits of the user. The adjustable range is 0-90 degrees to the left or right in Examples 1-3, and is the angle range limited by multiple positioning holes in Example 4, and the specific range is determined by the number of positioning holes.

[0147] Step S206) Locking the second handheld part; re-adjusting the locking device of the second handheld part in any one of the foldable handheld devices in Embodiments 1-4 to a locked state.

[0148] Before using the opening and closing handheld device, the angles of the handheld parts on both sides are adjusted using the angle adjustment method of the handheld part described in steps S201)-S206) to change the angle between the handheld parts and the clamping parts on both sides and change the distance between the two handheld parts so as to conform to the user's usage habits and make the user's operation more labor-saving, so that the opening and closing handheld device can be better applied to various working conditions.

[0149] The advantage of the present invention is that it provides an opening and closing handheld device and a handheld angle adjustment method thereof, so that the user can adjust the relative angle between the handheld part and the clamping part of the handheld tool in the opening and closing direction and lock it according to the size of his hand and his force application habits, so that the user can operate and use the handheld tool at the force application angle that is most familiar and convenient to him.

[0150] Under 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 hand-held part can be adjusted to a suitable position so that the distance between the two ends of the hand-held parts after opening can be relatively small. The user can exert force at the two ends of the hand-held parts with one hand to successfully complete the operation, which is more labor-saving than ordinary opening and closing devices.

[0151] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A foldable handheld device, comprising a first component and a second component; The first component includes a first clamping portion and a first hand-held portion; The second component includes a second clamping portion and a second hand-held portion; The first clamping part and the second clamping part are rotatably connected via a first pin shaft; The first clamping portion and the second clamping portion are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; it is characterized in that: The first hand-held portion is rotatably connected to the first clamping portion; The plane where the rotation path of the first hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the first hand-held portion and the first clamping portion, for locking or unlocking the first hand-held portion and the first clamping portion; The second hand-held portion is rotatably connected to the second clamping portion; The plane where the rotation path of the second hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the second hand-held portion and the second clamping portion, for locking or unlocking the second hand-held portion and the second clamping portion; The locking device comprises An extension portion, disposed on the first clamping portion; a protrusion, provided on the first hand-held portion and inserted into the extension portion; a second pin passing through the extension portion and the protrusion; Wherein, the protruding portion is movably connected to the extending portion via the second pin; The extension portion includes a first mounting plate; a second mounting plate, arranged opposite to the first mounting plate; an assembly groove, disposed between the first mounting plate and the second mounting plate, for inserting the protrusion; The first mounting plate includes a first mounting hole; The second mounting plate comprises 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 mounting hole, the third mounting hole and the second mounting hole in sequence; The locking device also includes A semicircular gear formed at the end of the first mounting plate and / or the second mounting plate; a limit block protruding from the upper surface of the first hand-held portion and close to the protruding portion; the limit block is provided with a U-shaped groove, the opening direction of the U-shaped groove faces the semicircular gear, and a spring mounting groove is provided at the bottom of the U-shaped groove; A sliding buckle is arranged in the U-shaped groove; the sliding buckle includes A buckle body, whose shape corresponds to the shape of the bottom of the U-shaped groove and is perpendicular to the protrusion; A buckle knob is disposed above the buckle body and protrudes from the upper surface of the first hand-held part; A second clip bar protrudes from the side wall of the buckle body and faces one side of the semicircular gear; the second clip bar is perpendicular to the protruding portion, and its length corresponds to that of the buckle body; A second spring mounting post is disposed on the side wall of the buckle body and faces one side of the spring mounting slot; the second spring mounting post is parallel to the protruding portion, and the second spring mounting post and the spring mounting slot are located on the same straight line; 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 of the second spring is located in the spring mounting groove.

2. The foldable handheld device according to claim 1, wherein: When the buckle toggle knob is pushed downward, the second clip 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 toggle knob is released, the second clamping strip is engaged with the semicircular gears of the first mounting plate and the second mounting plate; and the locking device is in a locked state.

3. The foldable handheld device according to claim 2, wherein: The height of the second clip protruding from the buckle body is less than the maximum compression distance of the second spring.

4. The foldable handheld device according to claim 1, wherein: The first hand-held part or the second hand-held part includes a handle; or includes a handle and a protective cover, and the protective cover is sleeved on the outside of the handle.

5. The foldable handheld device according to claim 1, wherein: The opening and closing type handheld device comprises a clamping tool and a shearing tool.

6. The foldable handheld device according to claim 5, wherein: The clamping tool is a pair of pliers, and the cutting tool is a pair of scissors.

7. A foldable handheld device, comprising a first component and a second component; The first component includes a first clamping portion and a first hand-held portion; The second component includes a second clamping portion and a second hand-held portion; The first clamping part and the second clamping part are rotatably connected via a first pin shaft; The first clamping portion and the second clamping portion are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; it is characterized in that: The first hand-held portion is rotatably connected to the first clamping portion; The plane where the rotation path of the first hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the first hand-held portion and the first clamping portion, for locking or unlocking the first hand-held portion and the first clamping portion; The second hand-held portion is rotatably connected to the second clamping portion; The plane where the rotation path of the second hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the second hand-held portion and the second clamping portion, for locking or unlocking the second hand-held portion and the second clamping portion; The locking device comprises An extension portion, disposed on the first clamping portion; a protrusion, provided on the first hand-held portion and inserted into the extension portion; a second pin passing through the extension portion and the protrusion; Wherein, the protruding portion is movably connected to the extending portion via the second pin; The extension portion includes a first mounting plate; a second mounting plate, arranged opposite to the first mounting plate; an assembly groove, disposed between the first mounting plate and the second mounting plate, for inserting the protrusion; The first mounting plate includes a first mounting hole; The second mounting plate comprises 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 mounting hole, the third mounting hole and the second mounting hole in sequence; The locking device also includes 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 integrally provided with the first mounting plate; Two mounting bases are arranged opposite to each other, protruding from the upper surface of the first hand-held part and close to the protruding part; the two mounting bases are respectively provided with a base pin shaft hole, and the two base pin shaft holes are located on the same straight line; A press buckle is arranged between two mounting bases, and the press buckle includes The second pressing plate has a pressing plate pin hole at one end close to the protruding portion, which is located on the same straight line as the two base pin holes; and a third spring mounting column is provided at the other end, which protrudes from and is perpendicular to the lower surface of the second pressing plate; A clamping portion, provided at one end of the second pressing plate close to the protruding portion, the clamping portion and the second pressing plate forming an angle of 120 to 160 degrees; and A third clamping strip is disposed on the top of the clamping portion, the third clamping strip protrudes downward and faces the circular gear; A third pin shaft passes through the pin shaft hole of the pressing plate and the two base pin shaft holes at the same time; and The third spring is sleeved on the outside of the third spring mounting column, one end of the third spring is tangent to the lower surface of the pressing buckle body, and the other end of the third spring is tangent to the upper surface of the first hand-held part.

8. The foldable handheld device according to claim 7, wherein: When the second pressing plate is pressed downward, the third clamping strip is disengaged from the circular gear, and the locking device is in an unlocked state; When the second pressing plate is released, the third clamping strip is engaged with the circular gear, and the locking device is in a locked state.

9. A foldable handheld device, comprising a first component and a second component; The first component includes a first clamping portion and a first hand-held portion; The second component includes a second clamping portion and a second hand-held portion; The first clamping part and the second clamping part are rotatably connected via a first pin shaft; The first clamping portion and the second clamping portion are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; it is characterized in that: The first hand-held portion is rotatably connected to the first clamping portion; The plane where the rotation path of the first hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the first hand-held portion and the first clamping portion, for locking or unlocking the first hand-held portion and the first clamping portion; The second hand-held portion is rotatably connected to the second clamping portion; The plane where the rotation path of the second hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the second hand-held portion and the second clamping portion, for locking or unlocking the second hand-held portion and the second clamping portion; The locking device comprises A first sliding pin, disposed at the connection between the upper portion of the first hand-held portion and the bottom end of the first clamping portion; A first fixing pin, provided at the connection between the top of the first hand-held part and the top of the second hand-held part; A second fixing pin, provided at the connection between the upper portion of the second hand-held portion and the bottom end of the second clamping portion; Wherein, the first sliding pin can be slidably mounted to the first clamping portion.

10. The foldable handheld device according to claim 9, wherein: The locking device also includes Two or more mutually connected positioning holes are provided at the bottom end of the first clamping portion and / or the second clamping portion; the first sliding pin and / or the second sliding pin can be slidably installed in the positioning holes; At least one sliding opening, each sliding opening is arranged at the connecting part between two adjacent positioning holes.

11. The foldable handheld device according to claim 10, wherein: The first sliding pin shaft or the second sliding pin shaft comprises a third pressing plate, a thin shaft portion, a thick shaft portion, and a pin shaft base which are connected to each other in sequence; The third pressing plate and the pin base protrude outside the first hand-held part or the second hand-held part; The diameter of the thin shaft portion corresponds to the width of the sliding opening; The diameter of the thick shaft portion corresponds to the diameter of the positioning hole.

12. The foldable handheld device according to claim 11, wherein: 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 of which is connected to the pin base of the first sliding pin and / or the second sliding pin.

13. The foldable handheld device according to claim 12, wherein: When the third pressing plate is pressed downward, the thick shaft portion is disengaged from a positioning hole; the locking device is in an unlocked state; the thin shaft portion 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.

14. The foldable handheld device according to claim 9, wherein: Also includes An elastic support member having an inverted V-shaped cross section; include A first bracket, one end of which penetrates through and is fixed to the first hand-held portion and the first clamping portion; A second bracket, one end of which penetrates through and is fixed to the second hand-held portion and the second clamping portion, and the other end of which is connected to the first bracket; The arc corner is located at the connection between the first bracket and the second bracket, and the inner side surface of the arc corner is tangent to the outer surface of the first fixing pin shaft.

15. A foldable handheld device, comprising a first component and a second component; The first component includes a first clamping portion and a first hand-held portion; The second component includes a second clamping portion and a second hand-held portion; The first clamping part and the second clamping part are rotatably connected via a first pin shaft; The first clamping portion and the second clamping portion are relatively opened and closed, and the plane where the opening and closing path is located is the opening and closing plane; it is characterized in that: The first hand-held portion is rotatably connected to the first clamping portion; The plane where the rotation path of the first hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the first hand-held portion and the first clamping portion, for locking or unlocking the first hand-held portion and the first clamping portion; The second hand-held portion is rotatably connected to the second clamping portion; The plane where the rotation path of the second hand-held part lies is the same as or parallel to the opening and closing plane; A locking device is provided at the connection between the second hand-held portion and the second clamping portion, for locking or unlocking the second hand-held portion and the second clamping portion; The locking device comprises A first sliding pin, disposed at the connection between the upper portion of the first hand-held portion and the bottom end of the first clamping portion; A first fixing pin, provided at the connection between the top of the first hand-held part and the top of the second hand-held part; A second sliding pin is provided at the connection between the upper portion of the second hand-held portion and the bottom end of the second clamping portion; Wherein, the first sliding pin can be slidably mounted to the first clamping portion; The second sliding pin is slidably mounted to the second clamping portion.

16. The foldable handheld device according to claim 15, wherein: The locking device also includes Two or more mutually connected positioning holes are provided at the bottom end of the first clamping portion and / or the second clamping portion; the first sliding pin and / or the second sliding pin can be slidably installed in the positioning holes; At least one sliding opening, each sliding opening is arranged at the connecting part between two adjacent positioning holes.

17. The foldable handheld device according to claim 16, wherein: The first sliding pin shaft or the second sliding pin shaft comprises a third pressing plate, a thin shaft portion, a thick shaft portion, and a pin shaft base which are connected to each other in sequence; The third pressing plate and the pin base protrude outside the first hand-held part or the second hand-held part; The diameter of the thin shaft portion corresponds to the width of the sliding opening; The diameter of the thick shaft portion corresponds to the diameter of the positioning hole.

18. The foldable handheld device according to claim 17, wherein: 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 of which is connected to the pin base of the first sliding pin and / or the second sliding pin.

19. The foldable handheld device according to claim 18, wherein: When the third pressing plate is pressed downward, the thick shaft portion is disengaged from a positioning hole; the locking device is in an unlocked state; the thin shaft portion 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.

20. The foldable handheld device according to claim 15, wherein: Also includes An elastic support member having an inverted V-shaped cross section; include A first bracket, one end of which penetrates through and is fixed to the first hand-held portion and the first clamping portion; A second bracket, one end of which penetrates through and is fixed to the second hand-held portion and the second clamping portion, and the other end of which is connected to the first bracket; The arc corner is located at the connection between the first bracket and the second bracket, and the inner side surface of the arc corner is tangent to the outer surface of the first fixing pin shaft.

21. A method for adjusting the angle of a hand-held portion of an opening and closing hand-held device as claimed in claim 1, characterized in that: The steps include: unlocking the first handheld part; Rotating the first hand-held portion relative to the first clamping portion; locking the first hand-held part; Wherein, the plane where the rotation path of the first hand-held part is located is the same as or parallel to the opening and closing plane.

22. A method for adjusting the angle of a hand-held portion of an opening and closing hand-held device as claimed in claim 1, characterized in that: The steps include: unlocking the first handheld part; Rotating the first hand-held portion relative to the first clamping portion; locking the first hand-held part; unlocking the second handheld part; Rotating the second hand-held portion relative to the second clamping portion; locking the second hand-held part; Wherein, the plane where the rotation path of the first hand-held part is located is the same as or parallel to the opening and closing plane; The plane where the rotation path of the second hand-held part lies is the same as or parallel to the opening and closing plane.

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