Needle feeder

Abstract

The needle feeder comprises a clamping assembly, a driving assembly and an anti-retreating assembly, the driving assembly is rotationally connected with a base, and the driving assembly is used for rotating relative to the base in the first rotating direction so as to drive at least two clamping jaws of the clamping assembly to slide relative to the base, so that the at least two clamping jaws are close to the center line of a mounting hole at the same time; a needle tool is clamped by the two clamping parts; the driving assembly is used for rotating relative to the base in the second rotating direction so as to drive the at least two clamping jaws to slide relative to the base, so that the at least two clamping jaws are away from the center line of the mounting hole at the same time and release the needling instrument, and the second rotating direction is opposite to the first rotating direction; the anti-retreating assembly is used for limiting the driving assembly to rotate relative to the base in the second rotating direction. The needle feeder provided by the embodiment of the utility model can solve the technical problem that an existing needle feeder can drive a needle-shaped structure to rotate in the process of clamping the needle-shaped structure.

Description

Technical Field

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

[0002] A needle feeder is a medical device used to clamp and move a needle-like structure. During orthopedic surgery, surgeons typically use a needle feeder to clamp the main elastic intramedullary needle to facilitate insertion into the medullary cavity. However, existing needle feeders rotate the needle during clamping, making it impossible to maintain the needle at the desired angle, thus affecting surgical efficiency. Utility Model Content

[0003] The embodiment of the present application provides a needle feeder, which aims to solve the technical problem that the existing needle feeder drives the needle structure to rotate during the process of clamping the needle structure.

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

[0005] The clamping assembly includes a base and at least two claws, the base including a mounting hole for inserting a needle, the at least two claws being distributed sequentially along the circumference of the mounting hole, the at least two claws being slidably connected to the base, and the at least two claws being inclined relative to the center line of the mounting hole in a sliding direction relative to the base;

[0006] a drive assembly rotatably connected to the base, the drive assembly being configured to rotate relative to the base in a first rotational direction to drive the at least two claws to slide relative to the base, causing the at least two claws to simultaneously approach the center line of the mounting hole and jointly clamp the needle; the drive assembly being configured to rotate relative to the base in a second rotational direction to drive the at least two claws to slide relative to the base, causing the at least two claws to simultaneously move away from the center line of the mounting hole and release the needle, the second rotational direction being opposite to the first rotational direction;

[0007] An anti-recoil assembly can move between a coupled state and a decoupled state. When the anti-recoil assembly is in the coupled state, it is connected to the base and the drive assembly to limit the drive assembly from rotating relative to the base along the second rotation direction; when the anti-recoil assembly is in the decoupled state, it is separated from the base or the drive assembly, so that the drive assembly can rotate relative to the base along the second rotation direction.

[0008] In some embodiments, the base includes at least two sliding holes distributed in sequence along the circumference of the mounting hole, the extension directions of the at least two sliding holes are inclined relative to the center line of the mounting hole, and the at least two claws are slidably installed in the at least two sliding holes in a one-to-one correspondence.

[0009] In some embodiments, the base includes a first end and a second end opposite to each other, the first end and the second end being distributed at both ends of the base along the extension direction of the mounting hole, and the needle feeder further includes a handle rod, one end of the handle rod being connected to the first end;

[0010] In a direction from the second end to the first end, a distance between each of the sliding holes and a center line of the mounting hole gradually increases.

[0011] In some embodiments, the at least two sliding holes extend to the inner circumference of the mounting hole respectively, and an opening is formed on the inner circumference of the mounting hole.

[0012] In some embodiments, the drive assembly includes a drive ring connected to the base, the drive ring being rotatable about the mounting hole, an internal thread being provided on an inner side of the drive ring, and a nominal diameter of the internal thread gradually increasing or decreasing along the length direction of the center line;

[0013] The at least two claws pass through the drive ring respectively, and each of the claws is provided with an external thread respectively, and the external thread is engaged with the internal thread.

[0014] In some embodiments, the drive ring is rotatably mounted on the outer periphery of the base.

[0015] In some embodiments, an annular receiving groove is provided on the outer circumference of the base, and the annular receiving groove extends along the circumference of the mounting hole, and at least a portion of the drive ring is received in the receiving groove.

[0016] In some embodiments, the drive assembly further includes a sleeve, the drive ring is disposed on the inner circumference of the sleeve, and the base is located inside the sleeve.

[0017] In some embodiments, the outer circumferential surface of the sleeve includes a friction surface, which extends along the circumference of the sleeve. The length of the friction surface in the axial direction of the sleeve is greater than or equal to 20 mm and less than or equal to 35 mm.

[0018] In some embodiments, the anti-retraction assembly includes a clamping member and a limiting member, the clamping member is connected to the driving assembly, the clamping member includes a first clamping portion, the limiting member is slidably connected to the base along the length direction of the center line, and the limiting member can slide relative to the base between a clamping position and a separation position, the limiting member includes a second clamping portion, and when the limiting member is in the clamping position, the first clamping portion is clamped with the second clamping portion, so that the anti-retraction assembly is in the coupled state;

[0019] When the limiting member is in the separation position, the second clamping portion is separated from the first clamping portion, so that the anti-retraction assembly is in the decoupling state.

[0020] The needle feeder provided in an embodiment of the present application has at least two claws distributed sequentially along the circumference of a mounting hole for inserting a needle, and the sliding directions of the at least two claws relative to the base are respectively inclined relative to the extension direction of the mounting hole. When the drive assembly rotates relative to the base in a first rotational direction to drive the at least two claws to slide relative to the base, so that the at least two claws simultaneously approach the center line of the mounting hole, the at least two claws can approach each other and clamp the needle-like structure. During this process, the claws and the base do not rotate, thereby avoiding the technical problem of the needle-like structure being rotated when the claws clamp the needle-like structure.

[0021] On this basis, the anti-retraction assembly is movable between a coupled state and an uncoupled state. When the anti-retraction assembly is in the coupled state, it is connected to the base and the drive assembly to restrict the drive assembly from rotating in a second rotational direction relative to the base, thereby restricting the drive assembly from driving the at least two claws to simultaneously move away from the center line of the mounting hole, so that the at least two claws can be stably maintained in the position of clamping the needle, thereby improving the clamping stability of the needle feeder clamping assembly on the needle. When the needle needs to be removed from the needle feeder, the anti-retraction assembly only needs to be moved from the coupled state to the uncoupled state, so that the drive assembly can rotate in the second rotational direction relative to the base, thereby driving the at least two claws to slide relative to the base, so that the at least two claws can simultaneously move away from the center line of the mounting hole and release the needle, which is very convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 A schematic structural diagram of an embodiment of a needle feeder provided in an embodiment of the present application;

[0024] Figure 2 for Figure 1 Cross-sectional view along AA direction;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 A schematic structural diagram of an embodiment of the needle feeder provided in an embodiment of the present application, wherein the sleeve is not shown and the anti-retraction assembly is in a coupled state;

[0027] Figure 5 This is a schematic structural diagram of an embodiment of the needle feeder provided in an embodiment of the present application, wherein the sleeve is not shown and the anti-retraction assembly is in a decoupled state.

[0028] Needle feeder 10; clamping assembly 11; base 110; mounting hole 1101; sliding hole 1102; first end 1103; second end 1104; accommodating groove 1105; claw 111; external thread 1111; drive assembly 12; drive ring 121; internal thread 1211; sleeve 122; friction surface 1221; anti-retraction assembly 13; clamping member 131; first clamping portion 1311; limiting member 132; second clamping portion 1321; handle rod 14; abutment member 15; elastic member 16; center line X; length L. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The present invention provides a needle feeder, which is described in detail below.

[0035] Figure 1 A schematic structural diagram of an embodiment of the needle feeder provided in an embodiment of the present application. Figure 2 for Figure 1 Cross-sectional view along AA direction. Figure 3 for Figure 2 The enlarged view of point A in the middle. Figures 1 to 3 As shown, the needle feeder 10 includes a clamping assembly 11 and a driving assembly 12. The driving assembly 12 is used to drive the clamping assembly 11 to clamp and release the needle.

[0036] The clamping assembly 11 includes a base 110 and at least two claws 111. The base 110 includes a mounting hole 1101 for inserting a needle. The at least two claws 111 are distributed in sequence along the circumference of the mounting hole 1101, and the at least two claws 111 are movably connected to the base 110 so that the at least two claws 111 can approach or move away from the center line X of the mounting hole 1101 at the same time.

[0037] The driving component 12 is movably connected to the base 110, and the driving component 12 is used to rotate relative to the base 110 to drive at least two claws 111 to move relative to the base 110, so that at least two claws 111 are close to the center line X of the mounting hole 1101 at the same time, or, at least two claws 111 are away from the center line X of the mounting hole 1101 at the same time.

[0038] Thus, after the needle is inserted into the mounting hole 1101 of the base 110, the driving assembly 12 can drive the at least two claws 111 to simultaneously approach the center line X of the mounting hole 1101, so that the at least two claws 111 approach and clamp the needle. When it is necessary to release the needle from the needle feeder 10, that is, to release the clamping of the needle so that the needle can be removed from the mounting hole 1101, the driving member can drive the at least two claws 111 to simultaneously move away from the center line X of the mounting hole 1101, so that the at least two claws 111 move away from and release the needle.

[0039] In some embodiments, at least two claws 111 can be respectively slidably connected to the base 110, and the sliding directions of the at least two claws 111 relative to the base 110 are respectively inclined relative to the center line X of the mounting hole 110. The drive assembly 12 is rotatably connected to the base 110, and the drive assembly 12 is configured to rotate relative to the base 110 in a first rotational direction to drive the at least two claws 111 to slide relative to the base 110, so that the at least two claws 111 simultaneously approach the center line X of the mounting hole 1101 and jointly clamp the needle. In addition, the drive assembly 12 is also configured to rotate relative to the base 110 in a second rotational direction to drive the at least two claws 111 to slide relative to the base 110, so that the at least two claws 111 simultaneously move away from the center line X of the mounting hole 1101 and release the needle. The second rotational direction is opposite to the first rotational direction.

[0040] like Figure 4 and Figure 5 As shown, the needle feeder 10 may further include an anti-retraction component 13, which may be in a coupled state (such as Figure 4 as shown) and decoupled state (as shown Figure 5When the anti-retraction assembly 13 is in the coupled state, it couples with the drive assembly 12 to restrict the drive assembly 12 from driving the at least two claws 111 away from the center line X of the mounting hole 1101 at the same time, so that the at least two claws 111 can be stably maintained at the position of clamping the needle. When the anti-retraction assembly 13 is in the decoupled state, it is decoupled from the drive assembly 12 to release the restriction on the drive assembly 12, so that the drive assembly 12 can drive the at least two claws 111 away from the center line X of the mounting hole 1101 at the same time, so that the at least two claws 111 can move to a position of releasing the needle.

[0041] Among them, the anti-retraction component 13 can be connected to the base 110 and the driving component 12 when it is in a coupled state to limit the driving component 12 from rotating in the second rotation direction relative to the base 110; and the anti-retraction component 13 can be separated from the base 110 or the driving component 12 when it is in a decoupled state, so that the driving component 12 can rotate in the second rotation direction relative to the base 110.

[0042] The needle feeder 10 provided in the embodiment of the present application is configured such that at least two claws 111 are sequentially distributed along the circumference of a mounting hole 1101 for inserting a needle, and the sliding directions of the at least two claws 111 relative to the base 110 are respectively inclined relative to the extension direction of the mounting hole 1101. When the drive assembly 12 rotates relative to the base 110 along a first rotational direction to drive the at least two claws 111 to slide relative to the base 110, so that the at least two claws 111 simultaneously approach the center line X of the mounting hole 1101, the at least two claws 111 can approach each other and clamp the needle-like structure. During this process, the claws 111 and the base 110 do not rotate, thereby avoiding the technical problem of the claws 111 causing the needle-like structure to rotate during the process of clamping the needle-like structure.

[0043] On this basis, the anti-retraction assembly 13 is also movable between a coupled state and an uncoupled state. When the anti-retraction assembly 13 is in the coupled state, it is connected to the base 110 and the drive assembly 12 to restrict the drive assembly 12 from rotating in the second rotational direction relative to the base 110, thereby restricting the drive assembly 12 from driving the at least two claws 111 to simultaneously move away from the center line X of the mounting hole 1101, so that the at least two claws 111 can be stably maintained in the position of clamping the needle, thereby improving the clamping stability of the clamping assembly 11 of the needle feeder 10 on the needle. When the needle needs to be removed from the needle feeder 10, the anti-retraction assembly 13 only needs to be moved from the coupled state to the uncoupled state, so that the drive assembly 12 can rotate in the second rotational direction relative to the base 110, thereby driving the at least two claws 111 to slide relative to the base 110, so that the at least two claws 111 can simultaneously move away from the center line X of the mounting hole 1101 and release the needle, which is very convenient to operate.

[0044] In some embodiments, as Figure 2 and Figure 3 As shown, the base 110 can include at least two sliding holes 1102 distributed sequentially along the circumference of the mounting hole 1101. The extension directions of the at least two sliding holes 1102 are inclined relative to the centerline X of the mounting hole 1101. The at least two claws 111 are slidably mounted in a one-to-one correspondence with the at least two sliding holes 1102, so that the at least two claws 111 are stably slidably connected to the base 110. Moreover, when the at least two claws 111 slide along the extension directions of the corresponding sliding holes 1102, they can simultaneously approach or simultaneously move away from the centerline X of the mounting hole 1101. When the drive assembly 12 rotates relative to the base 110 in the first rotational direction or the second rotational direction, it can drive the at least two claws 111 to slide along the extension directions of the corresponding sliding holes 1102, causing the at least two claws 111 to simultaneously approach or simultaneously move away from the centerline X of the mounting hole 1101.

[0045] Continue to refer to Figure 2 and Figure 3 The base 110 includes a first end 1103 and a second end 1104, which are located at opposite ends of the base 110 along the extension direction of the mounting hole 1101. The needle feeder 10 also includes a handle bar 14, one end of which is connected to the first end 1103 of the base 110. By gripping the handle bar 14, the surgeon can more conveniently operate the needle feeder 10.

[0046] In the direction from the second end 1104 to the first end 1103, the distance between each sliding hole 1102 and the centerline X of the mounting hole 1101 can be gradually increased. Thus, the driving assembly 12 can be rotated relative to the base 110 in a first rotational direction to drive the at least two claws 111 to slide within the sliding hole 1102 from the first end 1103 to the second end 1104 of the base 110, thereby simultaneously bringing the at least two claws 111 closer to the centerline X of the mounting hole 1101. Furthermore, by rotating the driving assembly 12 relative to the base 110 in a second rotational direction to drive the at least two claws 111 to slide within the sliding hole 1102 from the second end 1104 to the first end 1103 of the base 110, simultaneously moving the at least two claws 111 away from the centerline X of the mounting hole 1101.

[0047] In other embodiments, the distance between each sliding hole 1102 and the centerline X of the mounting hole 1101 may be gradually reduced in the direction from the second end 1104 to the first end 1103. Thus, the driving assembly 12 can be rotated relative to the base 110 in a first rotational direction to drive the at least two claws 111 to slide within the sliding hole 1102 in the direction from the second end 1104 to the first end 1103 of the base 110, thereby simultaneously moving the at least two claws 111 closer to the centerline X of the mounting hole 1101. Furthermore, by rotating the driving assembly 12 relative to the base 110 in a second rotational direction to drive the at least two claws 111 to slide within the sliding hole 1102 in the direction from the first end 1103 to the second end 1104 of the base 110, simultaneously moving the at least two claws 111 away from the centerline X of the mounting hole 1101.

[0048] In some embodiments, the at least two sliding holes 1102 can extend to the inner circumference of the mounting hole 1101, and an opening can be formed on the inner circumference of the mounting hole 1101. Thus, when the at least two clamping jaws 111 slide along the corresponding lines and simultaneously approach the center line X of the mounting hole 1101, the at least two clamping jaws 111 can extend into the mounting hole 1101 and be as close to the center line X of the mounting hole 1101 as possible, thereby enabling the at least two clamping jaws 111 to clamp needles with smaller diameters.

[0049] Specifically, the mounting hole 1101 can extend through the base 110 from the first end 1103 to the second end 1104. A through hole extending along the length L of the arm bar is provided in the handle bar 14, and one end of the mounting hole 1101 communicates with one end of the through hole. The handle bar 14 and the base 110 can be fixedly connected by threaded connection, snap connection, or other means.

[0050] In some embodiments, as Figures 2 to 5 As shown, the driving assembly 12 includes a driving ring 121 connected to the base 110, and the driving ring 121 can rotate around the mounting hole 1101. At least two claws 111 pass through the driving ring 121 respectively, and at least two claws 111 are respectively connected to the driving ring 121. When the driving ring 121 rotates around the mounting hole 1101 relative to the base 110, it can drive at least two claws 111 to slide relative to the base 110.

[0051] Specifically, an internal thread 1211 can be provided on the inside of the drive ring 121, with the nominal diameter of the internal thread 1211 gradually increasing or decreasing along the length L of the centerline X. Furthermore, an external thread 1111 is provided on each claw 111, and the external thread 1111 of each claw 111 engages with the internal thread 1211 of the drive ring 121. Thus, when the drive ring 121 rotates relative to the base 110 around the mounting hole 1101, the engagement of the internal thread 1211 and the external thread 1111 causes each claw 111 to slide stably relative to the base 110.

[0052] In some embodiments, the drive ring 121 can be rotatably mounted on the outer periphery of the base 110 so that the surgeon can apply force to the drive ring 121 to rotate the drive ring 121 around the mounting hole 1101 relative to the base 110 .

[0053] Among them, an annular accommodating groove 1105 can be opened on the outer periphery of the base 110, and the annular accommodating groove 1105 extends along the circumference of the mounting hole 1101, and at least part of the driving ring 121 is accommodated in the accommodating groove 1105, thereby limiting the movement of the driving ring 121 relative to the base 110 along the extension direction of the center line X, making the rotational connection between the driving ring 121 and the base 110 more stable.

[0054] Specifically, one end of the sliding hole 1102 of the base 110 extends to the inner circumferential surface of the mounting hole 1101 and has an opening formed therein. The other end of the sliding hole 1102 of the base 110 extends to the inner surface of the receiving groove 1105 and has an opening formed therein, thereby allowing a portion of at least two claws 111 to be positioned within the receiving groove 1105 and for the external threads 1111 of the claws 111 to engage with the internal threads 1211 of the drive ring 121.

[0055] In some embodiments, as Figures 1 to 3 As shown, the drive assembly 12 also includes a sleeve 122. The drive ring 121 is disposed on the inner circumference of the sleeve 122, and the base 110 is located within the sleeve 122. Thus, the sleeve 122 protects the base 110 and the drive ring 121, reducing the risk of contaminants being adsorbed on the base 110 and the drive ring 121. Furthermore, the shape of the sleeve 122 is more convenient for the surgeon to grip, enabling the surgeon to more conveniently operate the needle feeder 10.

[0056] The drive ring 121 and the sleeve 122 can be interference-fitted to ensure a stable connection between the drive ring 121 and the sleeve 122, and the sleeve 122 can drive the drive ring 121 to rotate. Of course, the drive ring 121 and the sleeve 122 can also be connected by clamping, gluing, welding, etc., which is not limited here.

[0057] In some embodiments, the outer circumferential surface of the sleeve 122 may include a friction surface 1221, which extends along the circumference of the sleeve 122. By forming the friction surface 1221 on the outer circumferential surface of the sleeve 122, when the surgeon grips the sleeve 122, the friction between the sleeve 122 and the surgeon's hand can be increased, allowing the surgeon to more easily drive the drive ring 121 to rotate through the sleeve 122.

[0058] The length L of the friction surface 1221 in the axial direction of the sleeve 122 can be greater than or equal to 20 mm and less than or equal to 35 mm, so that the area of ​​the friction surface 1221 of the sleeve 122 is as large as possible, making the operation more convenient for the surgeon.

[0059] In some embodiments, as Figures 2 to 5 As shown, the anti-retraction assembly 13 may include a clamping member 131 and a limiting member 132. The clamping member 131 is connected to the driving assembly 12 and includes a first clamping portion 1311. The limiting member 132 is movably connected to the base 110 and includes a second clamping portion 1321. By moving the limiting member 132 relative to the base 110, the second clamping portion 1321 of the limiting member 132 is engaged with and separated from the first clamping portion 1311 of the clamping member 131. When the second clamping portion 1321 of the limiting member 132 is engaged with the first clamping portion 1311 of the clamping member 131, the anti-retraction assembly 13 is in a coupled state. The limiting member 132 can limit the clamping member 131 from rotating relative to the base 110 along the second rotation direction, thereby limiting the driving assembly 12 from rotating relative to the base 110 along the second rotation direction. When the second clamping portion 1321 of the limiting member 132 is separated from the first clamping portion 1311 of the clamping member 131, the anti-retraction assembly 13 is in a decoupled state, and the clamping member 131 can rotate along the second rotation direction relative to the base 110, thereby allowing the driving assembly 12 to rotate along the second rotation direction relative to the base 110.

[0060] The limiting member 132 can be slidably connected to the base 110 along the length L of the center line X of the mounting hole 1101, and the limiting member 132 can be relatively connected to the base 110 in the locking position (such as Figure 4 as shown) and separation position (as shown) Figure 5 When the stopper 132 is in the engaged position, the first engaging portion 1311 engages the second engaging portion 1321, placing the anti-retraction assembly 13 in a coupled state. When the stopper 132 is in the disengaged position, the second engaging portion 1321 separates from the first engaging portion 1311, placing the anti-retraction assembly 13 in a decoupled state. Thus, the surgeon can drive the stopper 132 to slide between the engaged and disengaged positions by applying a force along the direction extending from the centerline X, making operation very convenient.

[0061] Specifically, the clamping member 131 is disposed within the sleeve 122 and is located on one side of the base 110 in the direction from the second end 1104 to the first end 1103. The clamping member 131 is configured to abut against the base 110 to limit movement of the base 110 relative to the sleeve 122 in the direction from the second end 1104 to the first end 1103, thereby allowing the base 110 to be stably retained within the sleeve 122. The clamping member 131 and the base 110 can be fixedly connected by means of a threaded connection, a snap connection, or the like.

[0062] The limiting member 132 is located on the side of the engaging member 131 facing away from the base 110. The handle rod 14 passes through the engaging member 131. The limiting member 132 is sleeved on the handle rod 14 and is slidably connected thereto, thereby indirectly slidably connecting the limiting member 132 to the base 110 and allowing the limiting member 132 to slide relative to the base 110 between an engaged position and a disengaged position. An abutment member 15 is also provided on the outer periphery of the handle rod 14. The abutment member 15 is located on the side of the limiting member 132 facing away from the engaging member 131. The abutment member 15 and the handle rod 14 can be fixedly connected by a threaded connection, a snap-fit ​​connection, or other means. An elastic member 16 is also provided between the abutment member 15 and the limiting member 132. One end of the elastic member 16 abuts the abutment member 15, and the other end abuts the limiting member 132, thereby applying an elastic force to the limiting member 132, thereby maintaining the limiting member 132 in the engaged position.

[0063] The first engaging portion 1311 is disposed on the side of the engaging member 131 facing the limiting member 132. The second engaging portion 1321 is disposed on the side of the limiting member 132 facing the engaging member 131. The first engaging portion 1311 and the second engaging portion 1321 may have an inverted tooth structure. When the first engaging portion 1311 and the second engaging portion 1321 are engaged, the engaging member 131 is allowed to rotate relative to the limiting member 132 in a first rotational direction, while being restricted from rotating relative to the limiting member 132 in a second rotational direction.

[0064] 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.

[0065] The above is a detailed introduction to a needle feeder provided in an 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 solutions and core ideas 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 make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A needle feeder, characterized in that: include: The clamping assembly includes a base and at least two claws, the base including a mounting hole for inserting a needle, the at least two claws being distributed sequentially along the circumference of the mounting hole, the at least two claws being slidably connected to the base, and the at least two claws being inclined relative to the center line of the mounting hole in a sliding direction relative to the base; a drive assembly rotatably connected to the base, the drive assembly being configured to rotate relative to the base in a first rotational direction to drive the at least two claws to slide relative to the base, causing the at least two claws to simultaneously approach the center line of the mounting hole and jointly clamp the needle; the drive assembly being configured to rotate relative to the base in a second rotational direction to drive the at least two claws to slide relative to the base, causing the at least two claws to simultaneously move away from the center line of the mounting hole and release the needle, the second rotational direction being opposite to the first rotational direction; An anti-recoil assembly can move between a coupled state and a decoupled state. When the anti-recoil assembly is in the coupled state, it is connected to the base and the drive assembly to limit the drive assembly from rotating relative to the base along the second rotation direction; when the anti-recoil assembly is in the decoupled state, it is separated from the base or the drive assembly, so that the drive assembly can rotate relative to the base along the second rotation direction.

2. The needle feeder according to claim 1, wherein: The base includes at least two sliding holes distributed in sequence along the circumference of the mounting hole, the extension directions of the at least two sliding holes are respectively inclined relative to the center line of the mounting hole, and the at least two claws are slidably installed in the at least two sliding holes in a one-to-one correspondence.

3. The needle feeder according to claim 2, wherein: The base includes a first end and a second end opposite to each other, the first end and the second end being distributed at both ends of the base along the extension direction of the mounting hole, and the needle feeder further includes a handle rod, one end of the handle rod being connected to the first end; In a direction from the second end to the first end, a distance between each of the sliding holes and a center line of the mounting hole gradually increases.

4. The needle feeder according to claim 3, characterized in that: The at least two sliding holes extend to the inner circumferential surface of the mounting hole respectively, and an opening is formed on the inner circumferential surface of the mounting hole.

5. The needle feeder according to claim 1, wherein: The drive assembly includes a drive ring connected to the base, the drive ring can rotate around the mounting hole, the inner side of the drive ring is provided with an internal thread, and the nominal diameter of the internal thread gradually increases or decreases along the length direction of the center line; The at least two claws pass through the drive ring respectively, and each of the claws is provided with an external thread respectively, and the external thread is engaged with the internal thread.

6. The needle feeder according to claim 5, characterized in that: The driving ring is rotatably mounted on the outer periphery of the base.

7. The needle feeder according to claim 6, characterized in that: An annular accommodating groove is formed on the outer periphery of the base, and the annular accommodating groove extends along the circumference of the mounting hole. At least a portion of the drive ring is accommodated in the accommodating groove.

8. The needle feeder according to claim 6, wherein: The driving assembly further includes a sleeve, the driving ring is arranged on the inner circumference of the sleeve, and the base is located in the sleeve.

9. The needle feeder according to claim 8, wherein: The outer circumferential surface of the sleeve includes a friction surface, which extends along the circumference of the sleeve. The length of the friction surface in the axial direction of the sleeve is greater than or equal to 20 mm and less than or equal to 35 mm.

10. The needle feeder according to any one of claims 1 to 9, characterized in that: The anti-retraction assembly includes a clamping member and a limiting member, the clamping member is connected to the driving assembly, the clamping member includes a first clamping portion, the limiting member is slidably connected to the base along the length direction of the center line, and the limiting member can slide between a clamping position and a separation position relative to the base, the limiting member includes a second clamping portion, and when the limiting member is in the clamping position, the first clamping portion is clamped with the second clamping portion, so that the anti-retraction assembly is in the coupled state; When the limiting member is in the separation position, the second clamping portion is separated from the first clamping portion, so that the anti-retraction assembly is in the decoupling state.

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