A needle positioning method

Abstract

The application relates to a processing positioning method, in particular to a needle positioning method, which comprises the following steps: placing a rod part of a needle in a groove of a base to realize coaxial positioning; moving a first clamping arm and a second clamping arm from a support frame to the base, so that a first end part and a second end part are closed in a clamping area between the base and the support frame; separating the first end part and the second end part, then sending a bending part to a position between the first end part and the second end part, so that the bending part is clamped by the first end part and the second end part to position an angle of the bending part around an axis; clamping the rod part on the base by a locking block to keep the positioning of the needle, then the first clamping arm and the second clamping arm are retreated to separate the first end part and the second end part again, so that the bending part is exposed. According to the structure of the application, the regular rod part can be preliminarily positioned by the groove of the base, and then secondarily positioned by the first clamping arm and the second clamping arm, so that the efficiency is higher and the positioning is more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to a machining positioning method, in particular to a needle positioning method. BACKGROUND

[0002] The description in this part only provides background information related to the present application disclosure, and does not constitute prior art.

[0003] In medical devices or precision instruments, a needle structure is often used, which is provided as a regular cylindrical needle tube shape, but also connected with a part of the special-shaped body, such as a special-shaped turning part and the like, and the special-shaped part structure also needs to be processed through repeated processes, and the positioning is more complex, which needs to be accurately positioned from multiple angle directions, which is a difficult problem in the processing and production link.

[0004] In the existing needle positioning, a separate mold is usually needed to position it, which is too high in cost, and after positioning, it is not convenient for the next step of processing, and at the same time, the existing part of the needle positioning method uses a non-fixed mold, but due to the need for multi-angle fixation, the positioning accuracy, especially for the special-shaped turning part, is difficult to achieve high-precision positioning, which seriously affects the subsequent processing effect.

[0005] At present, there is no needle positioning method that can solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a needle positioning method, which can realize preliminary positioning of the regular rod part through the groove of the base, and then realize secondary positioning through the first clamping arm and the second clamping arm, which is efficient and accurate in positioning.

[0007] In order to achieve the above purpose, the present application discloses a needle positioning method for positioning the needle, wherein the needle comprises a rod part and a bent part provided at one end of the rod part and bent along a direction not parallel to the extension direction of the rod part; wherein the needle positioning method comprises:

[0008] Placing the rod part of the needle in the groove of the base so that the rod part is coaxially positioned with the axial direction of the groove;

[0009] The first clamping arm and the second clamping arm move from the support frame direction to the base direction until the first end part of the first clamping arm for clamping the bent part and the second end part of the second clamping arm for clamping the bent part close the clamping area between the base and the support frame, at this time, the first end part and the second end part abut;

[0010] The first end portion and the second end portion are separated, and then the rod portion slides in the groove along the axial direction to the side of the clamping area until the bent portion is sent to the position between the first end portion and the second end portion, the first end portion and the second end portion are closed again, and the bent portion is clamped by the first end portion and the second end portion, so that the angle of the bent portion around the axial direction is positioned;

[0011] The rod portion is clamped on the base by the locking block to keep the position of the needle, and then the first clamping arm and the second clamping arm are retracted to separate the first end portion and the second end portion again, so that the bent portion is exposed.

[0012] The exposed bent portion is processed.

[0013] Further, in the step of "the first end portion and the second end portion are closed again, and the bent portion is clamped by the first end portion and the second end portion, so that the angle of the bent portion around the axial direction is positioned", when the first end portion and the second end portion clamp the bent portion, the first clamping arm and the second clamping arm are limited by the first protruding portion protruding from one end of the support frame towards the base, so that the bent portion has a preset angle around the axial direction when clamped by the first end portion and the second end portion.

[0014] Further, after the step of "the first end portion and the second end portion are closed again, and the bent portion is clamped by the first end portion and the second end portion, so that the angle of the bent portion around the axial direction is positioned", and before the step of "the rod portion is clamped on the base by the locking block to keep the position of the needle, and then the first clamping arm and the second clamping arm are retracted to separate the first end portion and the second end portion again, so that the bent portion is exposed", the first clamping arm and the second clamping arm are respectively limited by the second protruding portion protruding from one end of the support frame towards the base, so that the position of the bent portion along the axial direction is positioned when clamped by the first end portion and the second end portion.

[0015] Further, in the step of "the first end portion and the second end portion are closed again, and the bent portion is clamped by the first end portion and the second end portion, so that the angle of the bent portion around the axial direction is positioned", at least part of the first end portion and the second end portion abut each other.

[0016] Further, in the step of "at least part of the first end portion and the second end portion abut each other", a gap is formed between at least part of the first end portion and the second end portion for accommodating the bent portion.

[0017] Further, the size of the let-aside cavity matches the size of the bending part, and in the step of "the first end part and the second end part are closed again, the bending part is clamped by the first end part and the second end part, so that the angle of the bending part around the axial direction is positioned", the position where the bending part contacts the first end part and the second end part is arranged at the let-aside cavity.

[0018] Further, in the step of "the rod part is clamped on the base by the locking block, the position of the needle is maintained", the position where the locking block avoids the clamping area is arranged.

[0019] Further, the locking block contacts at least part of the rod part and the base, so that the locking block, the base, the rod part and the bending part are fixed to each other.

[0020] By means of the above technical solutions, the beneficial effects of the present application are as follows:

[0021] 1. The needle positioning method of the present application can preliminarily position the rod part of the needle through the groove of the base, and then realize the second positioning by clamping the bending part through the first clamping arm and the second clamping arm, and then realize the multi-angle positioning and processing of the bending part by locking through the locking block and withdrawing the first clamping arm and the second clamping arm. The above process can be completed by the same device, and the positioning precision and efficiency are maintained at a high level on the basis of limited cost.

[0022] 2. The needle positioning method of the present application realizes the positioning of the needle in the axial direction by limiting the first clamping arm and the second clamping arm through the second protruding part protruding from one end of the base towards the support frame after the first clamping arm and the second clamping arm clamp the bending part of the needle to realize the angle positioning, which significantly improves the positioning precision. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is a three-dimensional schematic view of a positioning clamp of a needle positioning method provided by the embodiments of the present application;

[0025] Figure 2 is another angle three-dimensional schematic view of a positioning clamp of a needle positioning method provided by the embodiments of the present application;

[0026] Figure 3is a schematic diagram of the internal structure of a needle positioning method provided by the embodiments of the present specification;

[0027] Figure 4 is a schematic diagram of a needle provided by the needle positioning method of the embodiments of the present specification;

[0028] In the figure: 100, needle; 101, rod part; 102, bent part; 1, first clamping arm; 11, first end part; 2, second clamping arm; 21, second end part; 3, base; 31, groove; 32, second protruding part; 4, support frame; 41, first protruding part; 42, sliding groove; 5, sliding block; 51, limiting pin; 6, locking block. DETAILED DESCRIPTION

[0029] In order for those skilled in the art to better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be described clearly and completely below in conjunction with the drawings in the embodiments of the present specification. Obviously, the described embodiments are only part of the embodiments of the present specification, not all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present specification.

[0030] In the description of the present application, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "rear" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. The embodiments of the present application will be described below according to the overall structure of the present application.

[0031] Please refer to Figures 1-4 , a needle positioning method of the present embodiment is positioned by a needle positioning clamp as shown in Figures 1-3 , wherein the needle 100 comprises a rod part 101 and a bent part 102 provided at one end of the rod part 101 and bent along a direction not parallel to the extension direction of the rod part 101; characterized in that the needle positioning clamp comprises:

[0032] a base 3, the base 3 has an axially extending groove 31, the size of the groove 31 matches the rod part 101;

[0033] a support frame 4, the support frame 4 is arranged on one side of the base 3;

[0034] The first clamping arm 1 and the second clamping arm 2 are movably connected on both sides of the support frame 4, the first clamping arm 1 comprises a first end portion 11 for clamping the bent portion 102, and the second clamping arm 2 comprises a second end portion 21 for clamping the bent portion 102,

[0035] The base 3 and the support frame 4 have a clamping area for the bent portion 102, the first end portion 11 and the second end portion 21;

[0036] The first clamping arm 1 and the second clamping arm 2 are rotatably connected with the sliding block 5, and the support frame 4 is provided with a sliding groove 42 extending in the axial direction matched with the sliding block 5, and the sliding block 5 is slidably connected with the sliding groove 42;

[0037] The first end portion 11 and the second end portion 21 are oppositely arranged, and the first clamping arm 1 is provided with a first elastic component between the first end portion 11 and the sliding block 5, and the second clamping arm 2 is provided with a second elastic component between the second end portion 21 and the sliding block 5, so that when the sliding block 5 slides to a preset position, the first end portion 11 and the second end portion 21 abut each other in the clamping area;

[0038] When the needle 100 is fixed, a locking block 6 is further sleeved on the base 3 for fixing the needle 100 and the base 3 relative to each other.

[0039] Through the above mechanism, the needle 100 is positioned in the embodiment by the following method, the steps comprising:

[0040] The rod portion 101 of the needle 100 is placed in the groove 31 of the base 3, so that the rod portion 101 is coaxially positioned in the axial direction;

[0041] The first clamping arm 1 and the second clamping arm 2 move from the support frame 4 to the base 3 until the first end portion 11 of the first clamping arm 1 for clamping the bent portion 102 and the second end portion 21 of the second clamping arm 2 for clamping the bent portion 102 close in the clamping area between the base 3 and the support frame 4, at this time, the first end portion 11 and the second end portion 21 abut each other;

[0042] The first end portion 11 and the second end portion 21 are separated, and then the rod portion 101 slides in the groove 31 in the axial direction to the side of the clamping area until the bent portion 102 is sent to the position between the first end portion 11 and the second end portion 21, and the first end portion 11 and the second end portion 21 are closed again, so that the bent portion 102 is clamped by the first end portion 11 and the second end portion 21, so that the angle of the bent portion 102 around the axial direction is positioned;

[0043] The rod portion 101 is clamped on the base 3 by the locking block 6 to maintain the positioning of the needle 100, and then the first clamping arm 1 and the second clamping arm 2 are retracted to separate the first end portion 11 and the second end portion 21 again, so that the bent portion 102 is exposed;

[0044] The exposed bent portion 102 is machined.

[0045] In the above process, firstly, when the rod portion 101 of the needle 100 with regular extension direction is placed on the groove 31 of the base 3, at least part of the rod portion 101 is embedded in the groove 31 of the base 3, so that the rod portion 101 is positioned coaxially with the axial direction by the groove. Then, the slide 5 is driven to move to the clamping area, so that the first clamping arm 1 and the second clamping arm 2 also move to the clamping area at the same time.

[0046] In the previous movement process, the first end portion 11 of the first clamping arm 1 is limited by the side wall of the slide 5 on the side connected with the first clamping arm 1, so that the first clamping arm 1 cannot rotate, until the first end portion 11 of the first clamping arm 1 moves to the clamping area, the side wall limiting of the slide 5 disappears, because the side away from the first end portion 11 of the first clamping arm 1 is provided with the first elastic mechanism connected with the slide 5 in a tense state, the middle position of the first clamping arm 1 is rotatably connected with the slide 5, at this time, the elastic force of the first elastic mechanism is released, the rotating shaft at the middle position of the first clamping arm 1 rotates relative to the slide 5, the first clamping arm 1 rotates around the middle position as the rotating center, so that the first end portion 11 of the first clamping arm 1 as one end of the rotation moves to the clamping area, until the first end portion 11 contacts the first protruding portion 41 of one end of the support frame 4, the first end portion 11 is limited by the first protruding portion 41. Similarly, the second end portion 21 of the second clamping arm 2 is limited by the side wall of the slide 5 on the side connected with the second clamping arm 2, so that the second clamping arm 2 cannot rotate, until the second end portion 21 of the second clamping arm 2 moves to the clamping area, the side wall limiting of the slide 5 disappears, because the side away from the second end portion 21 of the second clamping arm 2 is provided with the second elastic mechanism connected with the slide 5 in a tense state, the middle position of the second clamping arm 2 is rotatably connected with the slide 5, at this time, the elastic force of the second elastic mechanism is released, the rotating shaft at the middle position of the second clamping arm 2 rotates relative to the slide 5, the second clamping arm 2 rotates around the middle position as the rotating center, so that the second end portion 21 of the second clamping arm 2 as one end of the rotation moves to the clamping area, until the second end portion 21 contacts the first protruding portion 41 of one end of the support frame 4, at this time, the first end portion 11 and the second end portion 21 are jointly limited by the first protruding portion 41.

[0047] Then, under the external force, by controlling the first clamping arm 1 and the second clamping arm 2, the first end 11 and the second end 21 are slightly separated to make space for accommodating the bending part 102 between the first end 11 and the second end 21, so that the needle 100 can be pushed in the axial direction, and the rod part 101 of the needle 100 slides on the groove 31 until the bending part 102 is placed at the preset position of the first end 11 and the second end 21, then the first end 11 and the second end 21 are closed again. During the closing process, the inner side of the first end 11 may come into contact with the side of the bending part 102 facing the first end 11, and the inner side of the second end 21 may come into contact with the side of the bending part 102 facing the second end 21, so that the bending part 102 rotates under the left and right thrust, and finally the bending part 102 is rotated to the specified angle. At this time, the needle 100 is positioned along the angle around the axial direction.

[0048] Then, the slider 5 drives the first clamping arm 1 and the second clamping arm 2 to slightly displace in the axial direction, so that the first end 11 and the second end 21 abut against the second protruding part 32 protruding from the side wall of the base 3 facing the first end 11 and the second end 21. At this time, the positions of the first end 11 and the second end 21 in the axial direction are fixed.

[0049] At this point, through the above method, the needle 100 has completed the positioning in the axial direction, the angle positioning and the positioning in the axial position in sequence, and realized the positioning of the needle 100 from three angles by the same needle positioning clamp.

[0050] In the process, the first end 11 and the second end 21 are first pre-merged, then slightly opened, and then the bending part 102 of the needle 100 is sent to the position between the first end 11 and the second end 21, and the first end 11 and the second end 21 are merged to realize the clamping positioning of the bending part 102. Compared with directly merging the first end 11 and the second end 21 and directly clamping the bending part 102, the possibility of damage and deformation of the fragile bending part 102 structure caused by the first end 11 and the second end 21 is significantly reduced.

[0051] Meanwhile, after the process, the needle 100 is completely positioned, and then the locking block 6 is sleeved on the base 3 of the rod part 101 to fix the relative position between the rod part 101 and the base 3, so that the positioning of the needle 100 is maintained by the locking block 6, and then the first end part 11 and the second end part 21 are separated, and the first clamping arm 1, the second clamping arm 2 and the sliding block 5 are retreated in the direction away from the needle 100, so that the bending part 102 of the needle 100 is completely exposed, and the bending part 102 is processed from multiple angles in the positioned state, and after the bending part 102 is processed, the locking block 6 is removed, and at this time, the needle 100 is in a free state, which is convenient for subsequent taking out from the needle positioning clamp of the embodiment and performing the next operation. It is worth noting that in the above processing of the needle 100, only the retreat of the existing first clamping arm 1 and the second clamping arm 2 is needed, and the fixing of the locking block 6 is needed, so that the operation is simple and the processing efficiency is high.

[0052] Further, when the first end part 11 and the second end part 21 jointly clamp the bending part 102, the first clamping arm 11 and the second clamping arm 21 are limited by the first protruding part 41 of the support frame 4 protruding towards one end of the base, so that the bending part 102 has a preset angle around the axis when clamped by the first end part 11 and the second end part 21. That is, the positioning angle of the bending part 102 by the first end part 11 and the second end part 21 is affected by the position of the first protruding part 41, and the first protruding part 41 limits the final rotation and merging position of the first end part 11 and the second end part 21, and also limits the angle of the bending part 102 after being corrected and positioned. Preferably, in the embodiment, the first protruding part 41 is located at the middle position of the support frame 4, so as to keep the balance of the positioning of the bending part 102.

[0053] Further, as shown in Figure 3 the first clamping arm 1 and the second clamping arm 2 are respectively limited by the second protruding part 32 of the base 3 protruding towards one end of the support frame 4, so that the position of the bending part 102 along the axis is positioned when clamped by the first end part 11 and the second end part 21. Specifically, in the embodiment, the second protruding part 32 is provided with two second protruding parts 32 corresponding to the first clamping arm 1 and the second clamping arm 2 respectively, wherein each second protruding part 32 includes a column structure installed in the base 3 and a spherical body structure protruding towards the first clamping arm 1 or the second clamping arm 2, and the first clamping arm 1 or the second clamping arm 2 further includes a groove matched with the half sphere of the spherical body structure towards the corresponding second protruding part 32, so as to realize slight positioning by the geometric structure of the spherical body when the first clamping arm 1 or the second clamping arm 2 contacts the second protruding part 32, which is helpful to correct the deviation from the axis and improve the accuracy of the final positioning.

[0054] Further, when the bending part 102 is clamped by the first end part 11 and the second end part 21, a part of the first end part 11 and the second end part 21 is arranged in the arrangement cavity for the bending part 102, and another part of the first end part 11 and the second end part 21 is in contact with each other, so that the bending part 102 is clamped in the limited space of the arrangement cavity on the basis of maintaining the stability of the positioning of the bending part 102, and the size of the bending part 102 matches the arrangement cavity, avoiding that the bending part 102 is excessively pressed by the squeezing force from the first end part 11 and the second end part 21, and the force of the elastic element applied to the first clamping arm 1 and the second clamping arm 2 is converted into the contact force between the first end part 11 and the second end part 21.

[0055] Further, the position of the clamping area is arranged to avoid the locking block 6, and the locking block 6 is in contact with at least part of the rod part 101 and the base 3, so that the locking block 6, the base 3, the rod part 101 and the bending part 102 are fixed with each other. Specifically, the locking block 6 can be made of plastic material with lower material strength than the rod part 101, so as to avoid surface scratching of the rod part 101 when the rod part 101 is fixed, and the locking block 6 is arranged as an annular structure which can be completely sleeved on the base 3, and one side of the locking block 6 is provided with a fastener which can be tightened, so as to facilitate the operator to adjust the locking strength of the locking block 6, or to realize quick disassembly and assembly of the locking block 6.

[0056] Further, as shown in Figure 1 and Figure 3 , the support frame 4 further comprises an axial extending limiting groove, and the sliding block 5 comprises a limiting pin 51 which is arranged to pass through the limiting groove, and the limiting groove limits the axial movement distance of the limiting pin 51. Through the cooperation of the limiting groove and the limiting pin 51, the axial movement distance of the sliding block 5, the first clamping arm 1 and the second clamping arm 2 can be limited, so that the movement of the first clamping arm 1 and the second clamping arm 2 is controllable, and the axial movement of the first clamping arm 1 and the second clamping arm 2 has higher accuracy under the cooperation of the structure of the second protruding part 32.

[0057] Further, one side of the first clamping arm 1 and the second clamping arm 2 away from the sliding block 5 is provided with a concave pattern which is convenient for holding, so as to facilitate better easy control of the first clamping arm 1 and the second clamping arm 2 in the case of manual operation.

[0058] Although different specific embodiments are mentioned in the content of the present application, the present application is not limited to the cases described by the industry standards or the embodiments, and certain industry standards or implementation solutions slightly modified on the basis of the implementation described by the custom way or the embodiment can also achieve the same, equivalent or similar or modified expected implementation effects of the above embodiments. The embodiments of the application of the modified or modified data acquisition, processing, output, judgment method, etc. still belong to the scope of the optional implementation solutions of the present application.

[0059] While the application has been depicted, described, and is defined by reference to particular embodiments, those skilled in the art understand that modifications and variations can be made to the application without departing from the spirit or scope of the application, and it is therefore contemplated to include such modifications and variations as come within the scope of the application.

Claims

1. A needle positioning method for positioning a needle, wherein, The needle comprises a rod part and a bent part arranged at one end of the rod part and bent along a direction not parallel to the extending direction of the rod part; the needle positioning method comprises: placing the rod part of the needle in a groove of the base so that the rod part is coaxially positioned with the axial direction of the groove; moving the first clamping arm and the second clamping arm from the support frame to the base until the first end part of the bent part clamped by the first clamping arm and the second end part of the bent part clamped by the second clamping arm are closed in the clamping area between the base and the support frame, at this time, the first end part and the second end part abut each other; separating the first end part and the second end part, and then sliding the rod part in the groove along the axial direction to one side of the clamping area until the bent part is sent to the position between the first end part and the second end part, and the first end part and the second end part are closed again to clamp the bent part together so that the angle of the bent part around the axial direction is positioned; when the first end part and the second end part clamp the bent part together, the first clamping arm and the second clamping arm are just limited by the first protruding part protruding from one end of the base towards the base to make the bent part have a preset angle around the axial direction when clamped by the first end part and the second end part; the first clamping arm and the second clamping arm are respectively limited by the second protruding part protruding from one end of the base towards the support frame to make the position of the bent part along the axial direction be positioned when clamped by the first end part and the second end part; at least part of the first end part and the second end part abut each other; at least part of the first end part and the second end part form a space for accommodating the bent part; the size of the space matches the size of the bent part; the position of the bent part contacting the first end part and the second end part is arranged at the space; clamping the rod part on the base by the locking block to keep the position of the needle, and then the first clamping arm and the second clamping arm are retracted to separate the first end part and the second end part again to expose the bent part; processing the exposed bent part.

2. The needle positioning method of claim 1, wherein: In the step of "clamping the rod part on the base by the locking block to keep the position of the needle", the locking block is arranged to avoid the position of the clamping area.

3. The needle positioning method of claim 2, wherein: The locking block contacts at least part of the rod part and the base to make the locking block, the base, the rod part and the bent part fixed to each other.

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