Needle breaking forceps

Abstract

The utility model discloses a pair of needle breaking forceps which comprises two forceps handles and two forceps heads, and the two forceps handles are hinged to each other. The two clamp heads are connected with the two clamp handles in a one-to-one correspondence mode, and the two clamp handles rotate relatively so as to drive the two clamp heads to rotate relatively; each tong head is provided with at least one first through hole and at least one second through hole, and the aperture of the second through hole is larger than that of the first through hole; the two plier handles can relatively rotate to a first shearing position and a second shearing position, when the two plier handles are located at the first shearing position, the included angle between the two plier handles is alpha 1, and at least one first through hole of the two plier heads is in an aligned state; when the two forceps handles are located at the second shearing position, the included angle between the two forceps handles is alpha 2, at least one second through hole of the two forceps heads is in an aligned state, and alpha 2 is larger than alpha 1. And when the two forceps handles are located at the second shearing position, the included angle between the two forceps handles is relatively larger, and the two forceps handles have a larger shearing angle, so that the needle breaking forceps can easily shear a needle-shaped structure with a larger diameter.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a needle breaking pliers. Background Art

[0002] Needle-breaking pliers are medical devices used to cut intramedullary needles or other needle-like structures during orthopedic surgery. In actual use, needle-breaking pliers need to cut needle-like structures of various diameters. However, existing needle-breaking pliers are more laborious when cutting needle-like structures with larger diameters, which affects the efficiency of orthopedic surgery. Utility Model Content

[0003] The embodiment of the present application provides a needle breaking pliers, which aims to solve the problem that existing needle breaking pliers are more laborious when cutting needle-like structures with larger diameters.

[0004] The present invention provides a needle breaking pliers, comprising:

[0005] two pliers handles, the two pliers handles being hinged to each other;

[0006] Two pliers heads, the two pliers heads are connected to the two pliers handles in a one-to-one correspondence, and the two pliers handles rotate relative to each other to drive the two pliers heads to rotate relative to each other;

[0007] Wherein, each of the pliers heads is provided with at least one first through hole and at least one second through hole, and the aperture of the second through hole is larger than the aperture of the first through hole; the two pliers handles can be rotated relative to each other to a first shearing position and a second shearing position, and when the two pliers handles are in the first shearing position, the angle between the two pliers handles is α1, and the at least one first through hole of the two pliers heads is in an aligned state; when the two pliers handles are in the second shearing position, the angle between the two pliers handles is α2, and the at least one second through hole of the two pliers heads is in an aligned state, and α2>α1.

[0008] In some embodiments, when the two pliers handles are in the first shearing position, the at least one second through hole of the two pliers heads is in a non-aligned state; when the two pliers handles are in the second shearing position, the at least one first through hole of the two pliers heads is in a non-aligned state.

[0009] In some embodiments, when the at least one first through hole of the two pliers heads are in an aligned state, the at least one first through hole of the two pliers heads substantially overlap;

[0010] When the at least one second through hole of the two pliers heads are in an aligned state, the at least one second through hole of the two pliers heads substantially overlap.

[0011] In some embodiments, the pliers handle includes a first end and a second end opposite to each other, and the first end of the pliers handle is connected to the corresponding pliers head;

[0012] The needle breaking pliers further include two force rods, each of which includes a third end. The third ends of the two force rods are detachably connected to the second ends of the two pliers handles in a one-to-one correspondence.

[0013] In some embodiments, when the two clamp handles are in the second shearing position, the third end of the force rod is detachably connected to the second end of the corresponding clamp handle.

[0014] In some embodiments, one of the third end of the force rod and the second end of the clamp handle is provided with a connecting hole, and the other of the third end of the force rod and the second end of the clamp handle is provided with a connecting rod, and the connecting rod is inserted into the connecting hole so that the third end of the force rod is detachably connected to the corresponding second end of the clamp handle.

[0015] In some embodiments, the inner circumference of the connecting hole is provided with an internal thread, the outer circumference of the connecting rod is provided with an external thread, and the external thread is threadedly connected to the internal thread; or

[0016] A positioning groove is formed on the inner circumference of the connecting hole, and a positioning bead and an elastic member are provided on the connecting rod. The elastic member is connected to the positioning bead and drives the positioning bead so that a part of the positioning bead is located in the positioning groove.

[0017] In some embodiments, each of the pliers handles comprises an inner side and an outer side opposite to each other, the inner sides of the two pliers handles are close to each other, and the outer sides of the two pliers handles are away from each other;

[0018] The needle breaking pliers also include two force rods, each of which includes a third end. The third ends of the two force rods are connected to the second ends of the two pliers handles in a one-to-one correspondence, and the third ends of the force rods are located on the inner side or the outer side of the corresponding pliers handle.

[0019] In some embodiments, the ratio of the length of the force rod to the length of the clamp handle is greater than or equal to 2; the ratio of the length of the force rod to the length of the clamp handle is less than or equal to 3.5.

[0020] In some embodiments, the two pliers heads are hinged to the two pliers handles in a one-to-one correspondence, and the two pliers heads are hinged to one-to-one correspondence at ends away from the pliers handles.

[0021] In some embodiments, the two pliers heads are hinged via a hinge shaft, and the at least one first through hole and the at least one second through hole are located on a side of the hinge shaft away from the two pliers handles; and / or,

[0022] The two pliers heads are hinged via a hinge shaft, and the at least one first through hole and the at least one second through hole are sequentially distributed along the circumference of the hinge shaft.

[0023] In some embodiments, each of the pliers heads is provided with a plurality of the first through holes, and when the two pliers handles are in the first shearing position, the plurality of the first through holes of the two pliers heads are in a one-to-one alignment state; and / or,

[0024] Each of the pliers heads is provided with a plurality of the second through holes. When the two pliers handles are in the second shearing position, the plurality of the second through holes of the two pliers heads are in a one-to-one alignment state.

[0025] In some embodiments, the diameter of the first through hole is greater than or equal to 1.5 mm and less than or equal to 3 mm; and / or,

[0026] The diameter of the second through hole is greater than or equal to 3.5 mm and less than or equal to 4 mm.

[0027] The needle breaking pliers provided in the embodiment of the present application are configured such that when the two pliers handles are in the first shearing position, at least one first through hole of the two pliers heads is in an aligned state. When it is necessary to cut a needle-like structure with a relatively small diameter, the two pliers handles can be placed in the first shearing position, and the needle-like structure with a relatively small diameter can be passed through the first through holes of the two pliers heads. Then, the two pliers handles can be rotated relative to each other to drive the two pliers heads to rotate relative to each other, so that the first through holes of the two pliers heads are staggered to cut the needle-like structure with a relatively small diameter.

[0028] At the same time, when the two pliers handles are in the second shearing position, at least one second through hole of the two pliers heads is in an aligned state. When it is necessary to cut a needle-like structure with a relatively large diameter, the two pliers handles can be placed in the second shearing position, and the needle-like structure with a relatively large diameter can be passed through the second through holes of the two pliers heads. Then, the two pliers handles are rotated relative to each other to drive the two pliers heads to rotate relative to each other, so that the second through holes of the two pliers heads are staggered to cut the needle-like structure with a relatively large diameter.

[0029] On this basis, the angle α1 between the two pliers handles when they are in the first shearing position is smaller than the angle α2 between the two pliers handles when they are in the second shearing position. When the two pliers handles are in the second shearing position, the angle between the two pliers handles is relatively larger, and the two pliers handles have a larger shearing angle. The operator can apply less force to make the two pliers handles rotate relative to each other, thereby making it easier for the needle breaking pliers to cut needle-like structures with larger diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0031] Figure 1 A front view of an embodiment of the needle breaking pliers provided in an embodiment of the present application, wherein the two pliers handles are in a first cutting position;

[0032] Figure 2 A side view of an embodiment of the needle breaking pliers provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of the needle breaking pliers provided in an embodiment of the present application, wherein the two handles are connected to a force-adding rod and the two handles are in the second cutting position;

[0034] Figure 4 A schematic diagram of the partial structure of another embodiment of the clamp handle and the force-adding rod provided in an embodiment of the present application.

[0035] Needle breaking pliers 100; handle 110; first end 1101; second end 1102; connecting hole 1103; positioning slot 1104; inner side 1105; outer side 1106; first connecting shaft 120; second connecting shaft 130; pliers head 140; first through hole 141; second through hole 142; hinge shaft 143; force rod 150; third end 151; connecting rod 152; mounting hole 153; positioning bead 154; elastic member 155. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0041] An embodiment of the present application provides a needle breaking pliers.

[0042] Figure 1 This is a front view of an embodiment of the needle breaking pliers provided in an embodiment of the present application, wherein the two pliers handles are in a first cutting position. Figure 2 A side view of an embodiment of the needle breaking pliers provided in the present application. Figure 1 and Figure 2 As shown, the needle breaking forceps 100 include two handles 110 and two heads 140. The two handles 110 are hingedly connected to each other. The two heads 140 are connected to the two handles 110 in a one-to-one correspondence. The two handles 110 rotate relative to each other, driving the two heads 140 to rotate relative to each other, allowing the two heads 140 to cut the needle-like structure. The needle-like structure can be an intramedullary needle or other needle that needs to be cut.

[0043] Among them, each pliers head 140 can be provided with at least one first through hole 141, and the two pliers handles 110 can be rotated relative to each other to the first shearing position. When the two pliers handles 110 are in the first shearing position, the angle between the two pliers handles 110 is α1, and at least one first through hole 141 of the two pliers heads 140 is in an aligned state, so that the needle-like structure with a first outer diameter can pass through the relatively aligned first through holes 141 of the two pliers heads 140.

[0044] Therefore, when it is necessary to cut the needle-like structure with the first outer diameter, the two pliers handles 110 can be placed in the first cutting position, and the needle-like structure with the first outer diameter can be passed through the first through holes 141 of the two pliers heads 140, and then the two pliers handles 110 can be rotated relative to each other to drive the two pliers heads 140 to rotate relative to each other, so that the first through holes 141 of the two pliers heads 140 are staggered by a certain distance to cut the needle-like structure with the first outer diameter.

[0045] It should be noted that when at least one first through hole 141 of the two pliers heads 140 is aligned, the first through holes 141 of the two pliers heads 140 are connected to each other, so that the corresponding needle-like structure having the first outer diameter can pass through the first through holes 141 of the two pliers heads 140. Of course, the first outer diameter of the needle-like structure passing through the first through holes 141 of the two pliers heads 140 is less than or equal to the aperture of the first through hole 141.

[0046] Specifically, when the at least one first through hole 141 of the two pliers 140 is in an aligned state, the at least one first through hole 141 of the two pliers 140 can substantially overlap, that is, when the at least one first through hole 141 of the two pliers 140 is in an aligned state, the at least one first through hole 141 of the two pliers 140 completely overlaps, or, when the at least one first through hole 141 of the two pliers 140 is in an aligned state, the at least one first through hole 141 of the two pliers 140 can be misaligned to some extent, but can still allow a needle-like structure having a first outer diameter to pass through. Of course, the former can allow the first outer diameter of the needle-like structure passing through the first through hole 141 of the two pliers 140 to be as large as possible.

[0047] Figure 3 The two handles of the needle breaking pliers provided in the embodiment of the present application are connected to a force rod, and the two handles are in the second cutting position. Figure 3 As shown, each pliers head 140 may be provided with at least one second through hole 142, the diameter of the second through hole 142 being larger than the diameter of the first through hole 141. The two pliers handles 110 may be relatively rotated to a second shearing position. When the two pliers handles 110 are in the second shearing position, the at least one second through hole 142 of the two pliers heads 140 is aligned, so that a needle-like structure having a second outer diameter can pass through the relatively aligned second through holes 142 of the two pliers heads 140. The second outer diameter is larger than the first outer diameter.

[0048] Therefore, when it is necessary to cut the needle-like structure with the second outer diameter, the two pliers handles 110 can be placed in the second cutting position, and the needle-like structure with the second outer diameter can be passed through the second through holes 142 of the two pliers heads 140, and then the two pliers handles 110 can be rotated relative to each other to drive the two pliers heads 140 to rotate relative to each other, so that the second through holes 142 of the two pliers heads 140 are staggered by a certain distance to cut the needle-like structure with the second outer diameter.

[0049] It should be noted that when at least one second through hole 142 of the two pliers heads 140 is in an aligned state, the second through holes 142 of the two pliers heads 140 are connected to each other, so that the corresponding needle-like structure having the second outer diameter can pass through the second through holes 142 of the two pliers heads 140. Of course, the second outer diameter of the needle-like structure passing through the second through holes 142 of the two pliers heads 140 is less than or equal to the diameter of the second through hole 142.

[0050] Specifically, when the at least one second through hole 142 of the two pliers 140 is in an aligned state, the at least one second through hole 142 of the two pliers 140 can substantially overlap, that is, when the at least one second through hole 142 of the two pliers 140 is in an aligned state, the at least one second through hole 142 of the two pliers 140 completely overlaps, or, alternatively, the at least one second through hole 142 of the two pliers 140 can be misaligned to some extent, but can still allow the needle-like structure having the second outer diameter to pass through. Of course, the former can allow the second outer diameter of the needle-like structure passing through the second through hole 142 of the two pliers 140 to be as large as possible.

[0051] In some embodiments, the two handles 110 of the needle breaking pliers 100 can be relatively rotated to a first cutting position and a second cutting position. When the two handles 110 are in the first cutting position, the included angle between the two handles 110 is α1, and at least one first through hole 141 of the two pliers heads 140 is aligned. When the two handles 110 are in the second cutting position, the included angle between the two handles 110 is α2, and at least one second through hole 142 of the two pliers heads 140 is aligned. Furthermore, α2>α1.

[0052] The needle breaking pliers 100 provided in the embodiment of the present application are configured such that when the two pliers handles 110 are in the first shearing position, at least one first through hole 141 of the two pliers heads 140 is in an aligned state. When it is necessary to cut a needle-like structure with a relatively small diameter, the two pliers handles 110 can be placed in the first shearing position, and the needle-like structure with a relatively small diameter can be passed through the first through holes 141 of the two pliers heads 140. Then, the two pliers handles 110 can be rotated relative to each other to drive the two pliers heads 140 to rotate relative to each other, so that the first through holes 141 of the two pliers heads 140 are staggered to cut the needle-like structure with a relatively small diameter.

[0053] At the same time, when the two pliers handles 110 are in the second shearing position, at least one second through hole 142 of the two pliers heads 140 is in an aligned state. When it is necessary to cut a needle-like structure with a relatively large diameter, the two pliers handles 110 can be placed in the second shearing position, and the needle-like structure with a relatively large diameter can be passed through the second through holes 142 of the two pliers heads 140. Then, the two pliers handles 110 are rotated relative to each other to drive the two pliers heads 140 to rotate relative to each other, so that the second through holes 142 of the two pliers heads 140 are staggered to cut the needle-like structure with a relatively large diameter.

[0054] On this basis, the angle α1 between the two pliers handles 110 when they are in the first shearing position is smaller than the angle α2 between the two pliers handles 110 when they are in the second shearing position. When the two pliers handles 110 are in the second shearing position, the angle between the two pliers handles 110 is relatively larger, and the two pliers handles 110 have a larger shearing angle. The operator can apply less force to rotate the two pliers handles 110 relative to each other, thereby making it easier for the needle breaking pliers 100 to cut needle-like structures with larger diameters.

[0055] It should be noted that the measuring positions of the angle α1 of the two pliers handles 110 when the two pliers handles 110 are in the first shearing position, and the angle α2 of the two pliers handles 110 when the two pliers handles 110 are in the second shearing position are the same, that is, the two pliers handles 110 can rotate relative to each other around the rotation axis, and the angle formed by the line connecting the point P on the two pliers handles 110 and the same point on the rotation axis can be used as the angles α1 and α2, wherein the line is basically perpendicular to the rotation axis.

[0056] Point P can be located at one end of the two handles 110 away from the corresponding pliers head 140, or it can be located between the two ends of the two handles 110 and at the same distance from the rotation axis. When measuring α1 and α2, the same point P on the two handles 110 can be used as a reference.

[0057] In some embodiments, when the two pliers handles 110 are in the first shearing position, at least one second through hole 142 of the two pliers heads 140 can be in a non-aligned state. That is, when the two pliers handles 110 are in the first shearing position, at least one second through hole 142 of the two pliers heads 140 can be staggered by a large distance to avoid the needle-like structure with the first outer diameter passing through the second through hole 142 of the two pliers heads 140, thereby affecting the shearing of the needle-like structure with the first outer diameter.

[0058] Among them, when at least one second through hole 142 of the two pliers 140 is in a non-aligned state, at least one second through hole 142 of the two pliers 140 can be partially connected or completely staggered, as long as the needle-like structure with the first outer diameter cannot pass through the second through hole 142 of the two pliers 140.

[0059] Similarly, when the two pliers handles 110 are in the second shearing position, at least one first through hole 141 of the two pliers heads 140 can be in a non-aligned state, that is, when the two pliers handles 110 are in the second shearing position, at least one first through hole 141 of the two pliers heads 140 can be staggered by a large distance to avoid the needle-like structure with the second outer diameter passing through the first through hole 141 of the two pliers heads 140, thereby affecting the shearing of the needle-like structure with the second outer diameter.

[0060] Among them, when at least one first through hole 141 of the two pliers 140 is in a non-aligned state, at least one first through hole 141 of the two pliers 140 can be partially connected or completely staggered, as long as the needle-like structure with the second outer diameter cannot pass through the first through hole 141 of the two pliers 140.

[0061] like Figure 1 and Figure 3 As shown, the two pliers heads 140 can be hinged via a hinge axis 143, so that the two pliers heads 140 can rotate relative to each other about the hinge axis 143. When the two pliers handles 110 rotate relative to each other, the two pliers heads 140 are driven to rotate relative to each other about the hinge axis 143. Specifically, the two pliers heads 140 can be hinged to the two pliers handles 110, and the two pliers handles 110 can be hinged to each other, so that when the two pliers handles 110 rotate relative to each other, the two pliers heads 140 can be driven to rotate relative to each other about the hinge axis 143.

[0062] Specifically, the two pliers heads 140 can be hinged to the two pliers handles 110 in a one-to-one correspondence, and the ends of the two pliers heads 140 away from the pliers handles 110 are hinged in a one-to-one correspondence, so that when the two pliers handles 110 drive the corresponding pliers heads 140 to rotate relative to each other, there is a larger force arm, which makes it easier for the two pliers heads 140 to cut the needle-like structure with less effort.

[0063] The pliers head 140 and the corresponding pliers handle 110 are hingedly connected by a first connecting shaft 120, and the two pliers handles 110 are hingedly connected by a second connecting shaft 130. The axial directions of the first connecting shaft 120, the second connecting shaft 130 and the hinge shaft 143 are parallel to each other. The second connecting shaft 130 is located between the two ends of the pliers handle 110.

[0064] In other embodiments, the pliers handles 110 may be fixedly connected to the corresponding pliers heads 140 , and it is only necessary to enable the two pliers handles 110 to drive the corresponding pliers heads 140 to rotate relative to each other between the first shearing position and the second shearing position.

[0065] In some embodiments, at least one first through hole 141 and at least one second through hole 142 can be located on the side of the hinge shaft 143 away from the two pliers handles 110, so that at least one first through hole 141 and at least one second through hole 142 of the pliers head 140 are as close as possible to the end of the pliers head 140 away from the pliers handles 110, thereby reducing the risk of interference from human tissue or other structures when the needle breaking pliers 100 cuts the needle-like structure.

[0066] In addition, at least one first through hole 141 and at least one second through hole 142 can be distributed in sequence along the circumference of the hinge shaft 143 to minimize the distance from the edge of the pliers head 140 to the hinge shaft 143, which is beneficial to reducing the size of the pliers head 140 and allowing the pliers head 140 to be more conveniently inserted into the patient's body for operation.

[0067] It should be noted that the at least one first through hole 141 and the at least one second through hole 142 can be located on the side of the hinge shaft 143 away from the two handles 110, and the at least one first through hole 141 and the at least one second through hole 142 can be distributed sequentially along the circumference of the hinge shaft 143; the at least one first through hole 141 and the at least one second through hole 142 can also be located on the side of the hinge shaft 143 away from the two handles 110, and the at least one first through hole 141 and the at least one second through hole 142 can not be distributed sequentially along the circumference of the hinge shaft 143; or the at least one first through hole 141 and the at least one second through hole 142 can only be distributed sequentially along the circumference of the hinge shaft 143, and the at least one first through hole 141 and the at least one second through hole 142 can be located on the side of the hinge shaft 143 close to the two handles 110. Of course, the former can make the needle breaking pliers 100 more convenient to use.

[0068] In some embodiments, each pliers head 140 may be provided with a plurality of first through holes 141. When the two pliers handles 110 are in the first shearing position, the plurality of first through holes 141 of the two pliers heads 140 are aligned one-to-one. This allows the needle-like structure with the first outer diameter to pass through the first through holes 141 in different locations, depending on its position or size, and to be sheared.

[0069] It should be noted that the apertures of the multiple first through holes 141 of each clamp head 140 may be the same or different, as long as the aperture of the multiple first through holes 141 is smaller than the aperture of the second through holes 142 .

[0070] In some embodiments, the diameter of the first through hole 141 of the pliers head 140 can be greater than or equal to 1.5 mm and less than or equal to 3 mm, so as to facilitate the shearing operation of a needle-like structure with a first outer diameter between 1.5 mm and 3 mm. The diameter of the first through hole 141 of the pliers head 140 can be 1.8 mm, 2 mm, 2.1 mm, 2.5 mm, 2.8 mm, etc., depending on the size stability of the needle-like structure with the first outer diameter to be sheared.

[0071] Similarly, each pliers head 140 can be provided with a plurality of second through holes 142. When the two pliers handles 110 are in the second shearing position, the plurality of second through holes 142 of the two pliers heads 140 are aligned one to one. Thus, the second through holes 142 at different positions can be flexibly used to allow the needle-like structure with the second outer diameter to pass through, depending on the position or size of the needle-like structure with the second outer diameter, and to perform a shearing operation on the needle-like structure.

[0072] It should be noted that the apertures of the multiple second through holes 142 of each clamp head 140 may be the same or different, as long as the apertures of the multiple second through holes 142 are larger than the aperture of the first through hole 141 .

[0073] In some embodiments, the diameter of the second through hole 142 of the pliers head 140 can be greater than or equal to 3.5 mm and less than or equal to 4 mm, so as to facilitate the shearing operation of a needle-like structure with a first outer diameter between 3.5 mm and 4 mm. The diameter of the second through hole 142 of the pliers head 140 can be 3.6 mm, 3.7 mm, 3.8 mm, etc., depending on the size stability of the needle-like structure with the second outer diameter to be sheared.

[0074] like Figure 1 and Figure 3 As shown, the handle 110 of the shearing pliers includes a first end 1101 and a second end 1102 opposite each other, and the first end 1101 of the handle 110 is connected to the corresponding pliers head 140. In some embodiments, the needle breaking pliers 100 may further include two force rods 150, each of which includes a third end 151. The third ends 151 of the two force rods 150 are detachably connected to the second ends 1102 of the two handles 110 in a one-to-one correspondence. Thus, the force rods 150 can be used to increase the torque of the shearing pliers. By applying a small force to the force rods 150, the surgeon can drive the two handles 110 to rotate the corresponding pliers heads 140, causing the first through holes 141 or the second through holes 142 of the two pliers heads 140, which are in an aligned state, to stagger, thereby cutting a needle-like structure of a corresponding outer diameter. Especially when the two clamp handles 110 for cutting the money are in the second cutting position, by connecting the two force adding rods 150 to the two clamp handles 110 in a one-to-one correspondence, the surgeon can more easily cut the needle-like structure with the second outer diameter.

[0075] When the two clamp handles 110 are in the second shearing position, the third end 151 of the force rod 150 can be detachably connected to the second end 1102 of the corresponding clamp handle 110. Thus, when it is necessary to shear a needle-like structure having a second outer diameter, the third end 151 of the force rod 150 can be detachably connected to the second end 1102 of the corresponding clamp handle 110, making the operation easier for the surgeon. When it is necessary to shear a needle-like structure having a first outer diameter, the third end 151 of the force rod 150 can be separated from the second end 1102 of the corresponding clamp handle 110, allowing the surgeon to directly apply force to the two clamp handles 110, making the shearing operation more convenient.

[0076] In some embodiments, a connecting hole 1103 can be provided at one of the third end 151 of the force rod 150 and the second end 1102 of the clamp handle 110, and a connecting rod 152 can be provided at the other of the third end 151 of the force rod 150 and the second end 1102 of the clamp handle 110. By inserting the connecting rod 152 into the connecting hole 1103, the third end 151 of the force rod 150 and the corresponding second end 1102 of the clamp handle 110 can be detachably connected together, which is very convenient to operate.

[0077] It can be understood that a connecting hole 1103 can be provided at the third end 151 of the force rod 150, and a connecting rod 152 can be provided at the third end 151 of the force rod 150, or a connecting hole 1103 can be provided at one of the second ends 1102 of the clamp handle 110, and a connecting rod 152 can be provided at the other second end 1102 of the clamp handle 110, and the specific configuration can be determined according to the structure of the force rod 150 and the clamp handle 110.

[0078] Among them, an internal thread can be provided on the inner circumference of the connecting hole 1103, and an external thread can be provided on the outer circumference of the connecting rod 152. When the connecting rod 152 is inserted into the connecting hole 1103, the external thread of the connecting rod 152 is threadedly connected with the internal thread in the threaded hole, thereby reducing the risk of the connecting rod 152 falling out of the connecting hole 1103, making the connection between the force rod 150 and the corresponding clamp handle 110 more stable.

[0079] Or, as Figure 4 As shown, a positioning groove 1104 can also be opened on the inner circumferential surface of the connecting hole 1103, and a positioning bead 154 and an elastic member 155 can be provided on the connecting rod 152. The elastic member 155 is connected to the positioning bead 154 and drives the positioning bead 154 so that after the connecting rod 152 is inserted into the connecting hole 1103, a part of the positioning bead 154 is located in the positioning groove 1104, so that the positioning bead 154 can apply resistance to the inner side 1105 wall of the positioning groove 1104 to prevent the connecting rod 152 from escaping from the connecting hole 1103, thereby reducing the risk of the connecting rod 152 escaping from the connecting hole 1103.

[0080] Specifically, a mounting hole 153 can be formed on the outer periphery of the connecting rod 152, and a positioning bead 154 and an elastic member 155 can be installed in the mounting hole 153, with the elastic member 155 located between the positioning bead 154 and the bottom surface of the mounting hole 153. One end of the elastic member 155 abuts against the bottom surface of the mounting hole 153, and the other end of the elastic member 155 abuts against the side of the positioning bead 154 facing the bottom surface of the mounting hole 153. As a result, the elastic member 155 applies a thrust to the positioning bead 154, so that the positioning bead 154 remains in a position protruding from the outer periphery of the connecting rod 152. When the connecting rod 152 is inserted into the connecting hole 1103, a portion of the positioning bead 154 can be embedded in the positioning groove 1104. The elastic member 155 can be a spring, rubber, or other elastic component, which is not limited here.

[0081] In other embodiments, the third end 151 of the force rod 150 and the second end 1102 of the corresponding clamp handle 110 can be connected together by a detachable connection method such as screw connection, snap connection, pin connection, etc., or the third end 151 of the force rod 150 and the second end 1102 of the corresponding clamp handle 110 can be connected together in a non-detachable manner such as welding, gluing, etc.

[0082] like Figure 1 and Figure 3 As shown, each handle 110 includes an inner side 1105 and an outer side 1106 that are opposite each other. The inner sides 1105 of the two handles 110 are close to each other, while the outer sides 1106 of the two handles 110 are separated from each other. In other embodiments, the third end 151 of the force rod 150 can be located on the inner side 1105 or outer side 1106 of the corresponding handle 110 to avoid providing a connection hole 1103 in the force rod 150 or handle 110, which would affect the strength of the force rod 150 or handle 110 and thus the stability of the connection between the force rod 150 and the handle 110.

[0083] In some embodiments, the ratio of the length of the force rod 150 to the length of the handle 110 can be greater than or equal to 2 to increase the torque of the shearing forceps and reduce the operator's effort. The ratio of the length of the force rod 150 to the length of the handle 110 can be 2.2, 2.5, 2.8, 3, etc., depending on the structure of the force rod 150 and the handle 110, as well as the outer diameter of the needle-like structure to be sheared. Furthermore, the length of the handle 110 can be the extended length of the handle 110 from the first end 1101 to the second end 1102, i.e., the length of the handle 110 in its extended direction.

[0084] In addition, the ratio of the length of the force rod 150 to the length of the clamp handle 110 can be less than or equal to 3.5 to prevent the force rod 150 from being too long and affecting the normal use and storage of the cut coins. The ratio of the length of the force rod 150 to the length of the clamp handle 110 can be 2.4, 2.6, 2.9, 3.2, etc., depending on the structure of the force rod 150 and the clamp handle 110, as well as the outer diameter of the needle-like structure to be cut.

[0085] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The above is a detailed introduction to a kind of needle breaking pliers provided in the embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A needle breaking pliers, characterized in that: include: two pliers handles, the two pliers handles being hinged to each other; Two pliers heads, the two pliers heads are connected to the two pliers handles in a one-to-one correspondence, and the two pliers handles rotate relative to each other to drive the two pliers heads to rotate relative to each other; Wherein, each of the pliers heads is provided with at least one first through hole and at least one second through hole, and the aperture of the second through hole is larger than the aperture of the first through hole; the two pliers handles can be rotated relative to each other to a first shearing position and a second shearing position, and when the two pliers handles are in the first shearing position, the angle between the two pliers handles is α1, and the at least one first through hole of the two pliers heads is in an aligned state; when the two pliers handles are in the second shearing position, the angle between the two pliers handles is α2, and the at least one second through hole of the two pliers heads is in an aligned state, and α2>α1.

2. The needle breaking pliers according to claim 1, wherein: When the two pliers handles are in the first shearing position, the at least one second through hole of the two pliers heads is in a non-aligned state; when the two pliers handles are in the second shearing position, the at least one first through hole of the two pliers heads is in a non-aligned state.

3. The needle breaking pliers according to claim 1, wherein: When the at least one first through hole of the two pliers heads is in an aligned state, the at least one first through hole of the two pliers heads substantially overlap; When the at least one second through hole of the two pliers heads are in an aligned state, the at least one second through hole of the two pliers heads substantially overlap.

4. The needle breaking pliers according to claim 1, wherein: The pliers handle comprises a first end and a second end opposite to each other, and the first end of the pliers handle is connected to the corresponding pliers head; The needle breaking pliers further include two force rods, each of which includes a third end. The third ends of the two force rods are detachably connected to the second ends of the two pliers handles in a one-to-one correspondence.

5. The needle breaking pliers according to claim 4, wherein: When the two clamp handles are in the second shearing position, the third end of the force applying rod is detachably connected to the second end of the corresponding clamp handle.

6. The needle breaking pliers according to claim 4, wherein: One of the third end of the force rod and the second end of the clamp handle is provided with a connecting hole, and the other of the third end of the force rod and the second end of the clamp handle is provided with a connecting rod, which is inserted into the connecting hole so that the third end of the force rod is detachably connected to the corresponding second end of the clamp handle.

7. The needle breaking pliers according to claim 6, wherein: The inner circumference of the connecting hole is provided with an internal thread, the outer circumference of the connecting rod is provided with an external thread, and the external thread is threadedly connected to the internal thread; or, A positioning groove is formed on the inner circumference of the connecting hole, and a positioning bead and an elastic member are provided on the connecting rod. The elastic member is connected to the positioning bead and drives the positioning bead so that a part of the positioning bead is located in the positioning groove.

8. The needle breaking pliers according to claim 4, wherein: Each of the pliers handles comprises an inner side and an outer side opposite to each other, wherein the inner sides of the two pliers handles are close to each other, and the outer sides of the two pliers handles are away from each other; The needle breaking pliers also include two force rods, each of which includes a third end. The third ends of the two force rods are connected to the second ends of the two pliers handles in a one-to-one correspondence, and the third ends of the force rods are located on the inner side or the outer side of the corresponding pliers handle.

9. The needle breaking pliers according to claim 4, wherein: The ratio of the length of the force-adding rod to the length of the clamp handle is greater than or equal to 2; the ratio of the length of the force-adding rod to the length of the clamp handle is less than or equal to 3.

5.

10. The needle breaking pliers according to any one of claims 1 to 9, characterized in that: The two pliers heads are hinged to the two pliers handles in a one-to-one correspondence, and the ends of the two pliers heads away from the pliers handles are hinged to each other in a one-to-one correspondence.

11. The needle breaking pliers according to claim 10, wherein: The two pliers heads are hinged via a hinge shaft, and the at least one first through hole and the at least one second through hole are located on a side of the hinge shaft away from the two pliers handles; and / or, The two pliers heads are hinged via a hinge shaft, and the at least one first through hole and the at least one second through hole are sequentially distributed along the circumference of the hinge shaft.

12. The needle breaking pliers according to any one of claims 1 to 9, characterized in that: Each of the pliers heads is provided with a plurality of the first through holes, and when the two pliers handles are in the first shearing position, the plurality of the first through holes of the two pliers heads are in a one-to-one alignment state; and / or, Each of the pliers heads is provided with a plurality of the second through holes. When the two pliers handles are in the second shearing position, the plurality of the second through holes of the two pliers heads are in a one-to-one alignment state.

13. The needle breaking pliers according to any one of claims 1 to 9, characterized in that: The diameter of the first through hole is greater than or equal to 1.5 mm and less than or equal to 3 mm; and / or, The diameter of the second through hole is greater than or equal to 3.5 mm and less than or equal to 4 mm.

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