Needle positioning clamp

Abstract

The utility model relates to a needle fixture, in particular to a needle positioning fixture, which comprises a base, a positioning pin and a positioning pin. The supporting frame is arranged on one side of the base; the first clamping arm comprises a first end part used for clamping the bending part, the second clamping arm comprises a second end part used for clamping the bending part, the first clamping arm and the second clamping arm are rotatably connected with the sliding block, the supporting frame is provided with a sliding groove which is matched with the sliding block and extends in the axial direction, and the sliding block is slidably connected with the sliding groove; the first end part and the second end part are oppositely arranged, and the first end part and the second end part abut against each other in the clamping area through the first elastic assembly and the second elastic assembly; after the needle is fixed, the needle fixing device further comprises a locking block which is arranged on the base in a sleeving mode and used for fixing the needle and the base. By means of the structure, needle positioning in multiple directions and angles can be achieved through the same clamp.

Description

Technical Field

[0001] The utility model relates to a needle fixture, in particular to a needle positioning fixture. Background Art

[0002] The description of this part only provides background information related to the disclosure of the utility model, and does not constitute prior art.

[0003] A needle structure is often used in medical devices or precision instruments. The main body of the needle structure is set in the shape of a regular cylindrical needle tube, but at the same time, it is also connected with a part of a special-shaped body, such as a special-shaped turning part and other structures. Usually, the special-shaped part structure also needs to be specially processed through repeated processes, and its positioning is relatively complex, and precise positioning needs to be carried out from multiple angular directions, which is a difficult problem in the processing and production links. The existing fixtures for positioning needles rely only on themselves, and usually can only complete the positioning in one or two directions, and it is difficult to realize the fixation in multiple directions and angles on the basis of the same fixture, and the positioning accuracy is difficult to guarantee.

[0004] At present, there is no needle positioning fixture that can solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a needle positioning fixture that can realize the positioning of needles in multiple directions and angles with the same fixture.

[0006] To achieve the above purpose, the utility model discloses a needle positioning fixture, wherein the needle includes a rod portion and a bending portion provided at one end of the rod portion and bent along a direction not parallel to the extending direction of the rod portion; wherein, the needle positioning fixture includes:

[0007] A base, on which there is an axially extending groove, and the size of the groove matches that of the rod portion;

[0008] A support frame, which is arranged on one side of the base;

[0009] A first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are movably connected to both sides of the support frame, the first clamping arm includes a first end for clamping the bending portion, and the second clamping arm includes a second end for clamping the bending portion,

[0010] wherein, there is a clamping area between the base and the support frame for the bending portion, the first end and the second end;

[0011] The first clamping arm and the second clamping arm are rotatably connected to a slider, and the support frame is provided with an axially extending chute matching the slider, and the slider is slidably connected to the chute;

[0012] The first end portion and the second end portion are oppositely arranged, and a first elastic component is provided between the first clamping arm and the slider, and a second elastic component is provided between the second clamping arm and the slider, so that when the slider slides to a preset position, the first end portion and the second end portion abut against each other in the clamping area;

[0013] After the needle is fixed, a locking block sleeved on the base is further included for fixing the needle and the base to each other.

[0014] Further, an intermediate position of the first clamping arm is rotatably connected to the sliding groove, and the first elastic component is arranged between one end of the first clamping arm far from the first end portion and the slider.

[0015] Further, an intermediate position of the second clamping arm is rotatably connected to the sliding groove, and the second elastic component is arranged between one end of the second clamping arm far from the first end portion and the slider.

[0016] Further, the support frame has a first convex portion protruding towards one end of the base. When the first end portion and the second end portion clamp the bent portion in the clamping area, the first clamping arm and the second clamping arm are limited by the first convex portion.

[0017] Further, the base has a second convex portion protruding towards one end of the support frame. When the first end portion and the second end portion clamp the bent portion in the clamping area, the second convex portion limits the movement of the first clamping arm and the second clamping arm along the axial direction.

[0018] Further, the second convex portion includes two spherical bodies, and the position of each spherical body corresponds to one of the first clamping arm and the second clamping arm.

[0019] Further, the sides of the first clamping arm and the second clamping arm far from the slider have concave lines for easy gripping.

[0020] Further, the support frame further includes a limiting groove extending along the axial direction, and the slider includes a limiting pin passing through the limiting groove, and the limiting groove limits the moving distance of the limiting pin along the axial direction.

[0021] By means of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0022] The needle positioning fixture of the present utility model can realize coaxial positioning of the needle through the groove of the base, and the first clamping arm and the second clamping arm realize clamping of the needle, positioning around the axial direction and positioning of the position in the axial direction. Multiple positioning is achieved with the same fixture, and the processing efficiency is relatively high. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in this specification. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a three-dimensional schematic diagram of a positioning fixture for a needle positioning method provided by an embodiment of this specification;

[0025] Figure 2 It is another three-dimensional schematic diagram of a positioning fixture for a needle positioning method provided by an embodiment of this specification;

[0026] Figure 3 It is an internal structure schematic diagram of a needle positioning method provided by an embodiment of this specification;

[0027] Figure 4 It is a schematic diagram of a needle for a needle positioning method provided by an embodiment of this specification;

[0028] In the figure: 100, needle; 101, rod part; 102, bending part; 1, first clamping arm; 11, first end; 2, second clamping arm; 21, second end; 3, base; 31, groove; 32, second protrusion; 4, support frame; 41, first protrusion; 42, sliding groove; 5, slider; 51, limit pin; 6, locking block. Specific embodiments

[0029] In order to enable those skilled in the art to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments of this specification in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation manners according to the overall structure of the present utility model.

[0031] Please refer to Figures 1-4 , a needle positioning method for this embodiment, which is positioned by a needle positioning fixture as shown in Figures 1-3 . Among them, the needle 100 includes a rod portion 101 and a bent portion 102 provided at one end of the rod portion 101 and bent along a direction not parallel to the extending direction of the rod portion 101; it is characterized in that the needle positioning fixture includes:

[0032] A base 3, on which there is an axially extending groove 31, and the size of the groove 31 matches that of the rod portion 101;

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

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

[0035] Among them, there is a clamping area for the bent portion 102, the first end portion 11 and the second end portion 21 between the base 3 and the support frame 4;

[0036] The first clamping arm 1 and the second clamping arm 2 are rotatably connected to a slider 5. An axially extending chute 42 matching the slider 5 is provided on the support frame 4, and the slider 5 is slidably connected to the chute 42;

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

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

[0039] With the above mechanism, in this embodiment, the needle 100 is positioned by the following method, and the steps include:

[0040] Place the rod portion 101 of the needle 100 in the groove 31 of the base 3 so that the rod portion 101 is coaxially positioned with the axis.

[0041] The first clamping arm 1 and the second clamping arm 2 move from the direction of the support frame 4 towards the direction of the base 3 until the first end 11 of the first clamping arm 1 for clamping the bent portion 102 and the second end 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 11 and the second end 21 are in contact with each other.

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

[0043] Clamp the rod portion 101 on the base 3 through the locking block 6 to maintain the positioning of the needle 100. Then, the first clamping arm 1 and the second clamping arm 2 retract, so that the first end 11 and the second end 21 are separated again, so that the bent portion 102 is exposed.

[0044] Machine the exposed bent portion 102.

[0045] In the above process, when initially placing the rod portion 101 of the needle 100 with a regular extension direction 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 coaxially positioned with the axis through the groove. Then, drive the slider 5 to move towards the clamping area, so that the first clamping arm 1 and the second clamping arm 2 also move towards the clamping area at the same time.

[0046] During the previous movement process, the first end portion 11 of the first clamping arm 1 is limited by the side wall of the slider 5 on the side where the first clamping arm 1 is connected, 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 limit of the slider 5 disappears. Since there is a first elastic mechanism connected to the slider 5 and in a tension state on the side of the first clamping arm 1 away from the first end portion 11, the middle position of the first clamping arm 1 is rotatably connected to the slider 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 slider 5, and the first clamping arm 1 rotates with the middle position as the center of rotation, so that the first end portion 11 of the first clamping arm 1, as one end of the rotation, moves towards the clamping area until the first end portion 11 contacts the first convex portion 41 at one end of the support frame 4, and the first end portion 11 is limited by the first convex portion 41. Similarly, the second end portion 21 of the second clamping arm 2 is limited by the side wall of the slider 5 on the side where the second clamping arm 2 is connected, 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 limit of the slider 5 disappears. Since there is a second elastic mechanism connected to the slider 5 and in a tension state on the side of the second clamping arm 2 away from the second end portion 21, the middle position of the second clamping arm 2 is rotatably connected to the slider 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 slider 5, and the second clamping arm 2 rotates with the middle position as the center of rotation, so that the second end portion 21 of the second clamping arm 2, as one end of the rotation, moves towards the clamping area until the second end portion 21 contacts the first convex portion 41 at 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 convex portion 41.

[0047] Then, under the drive of an external force, by controlling the first clamping arm 1 and the second clamping arm 2, the first end portion 11 and the second end portion 21 are slightly separated to create a space for accommodating the bent portion 102 between the first end portion 11 and the second end portion 21. Then, the needle 100 can be axially pushed, and the rod portion 101 of the needle 100 slides on the groove 31. Until the bent portion 102 is placed at the preset position of the first end portion 11 and the second end portion 21, the first end portion 11 and the second end portion 21 can be closed again. During the closing process of the first end portion 11 and the second end portion 21, the inner side surface of the first end portion 11 may contact the side of the bent portion 102 facing the first end portion 11, and the inner side surface of the second end portion 21 may contact the side of the bent portion 102 facing the second end portion 21, so that the bent portion 102 rotates under the left and right thrusts, and finally the bent portion 102 rotates to the specified angle. At this time, the needle 100 is positioned at an angle around the axis.

[0048] Subsequently, the slider 5 drives the first clamping arm 1 and the second clamping arm 2 to undergo a slight axial displacement, so that the first end 11 and the second end 21 face one side wall of the base 3 and abut against the second convex portion 32 protruding from the side of the base 3 facing the first end 11 and the second end 21. At this time, the axial positions of the first end 11 and the second end 21 are fixed.

[0049] Thus, through the above method, the needle 100 has successively completed the positioning of the axial coaxiality, the positioning of the angle, and the positioning of the axial position, and realized the positioning of the needle 100 from three angles by relying on the same needle positioning fixture.

[0050] Moreover, during the process, the first end 11 and the second end 21 are first pre-merged, and then the first end 11 and the second end 21 slightly open, and then the bent portion 102 of the needle 100 is sent into 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 and positioning of the bent portion 102. Compared with directly merging the first end 11 and the second end 21 at once and directly clamping the bent portion 102, the possibility that the first end 11 and the second end 21 may cause damage and deformation to the fragile structure of the bent portion 102 is significantly reduced.

[0051] At the same time, after the above process, after the needle 100 is completely positioned, the locking block 6 can be sleeved on the base 3 of the placement rod portion 101 to realize the relative fixation between the rod portion 101 and the base 3, so that the positioning of the needle 100 is maintained by the locking block 6. Then, the first end 11 and the second end 21 can be separated, and the first clamping arm 1, the second clamping arm 2 and the slider 5 are retracted in the direction away from the needle 100, so that the bent portion 102 of the needle 100 is completely exposed, which is convenient for processing the bent portion 102 from various angles when the bent portion 102 is positioned. After the bent portion 102 is processed, the locking block 6 can be removed. At this time, the needle 100 is in a non-positioned free state, which is convenient for subsequent removal from the needle positioning fixture of this embodiment for the next operation. It should be noted that in the above processing operation of the needle 100, only by retracting the first clamping arm 1 and the second clamping arm 2 of the existing structure and relying on the fixation of the locking block 6 can it be realized, and the operation is simple and has a high processing efficiency.

[0052] Further, when the first end portion 11 and the second end portion 21 jointly clamp the bent portion 102, the first clamping arm 11 and the second clamping arm 21 are exactly limited by the first convex portion 41 protruding towards one end of the base on the support frame 4, so that when the bent portion 102 is clamped by the first end portion 11 and the second end portion 21, it has a preset angle around the axis. That is to say, the positioning angle of the first end portion 11 and the second end portion 21 on the bent portion 102 is affected by the position of the first convex portion 41. The first convex portion 41 limits the final rotational merging position of the first end portion 11 and the second end portion 21, and also limits the angle of the bent portion 102 after being corrected and positioned. Preferably, in this embodiment, the first convex portion 41 is located at the central position of the support frame 4 to facilitate maintaining the balance of the positioning of the bent portion 102.

[0053] Further, as Figure 3 shown, the first clamping arm 1 and the second clamping arm 2 are respectively limited by the second convex portion 32 protruding towards one end of the support frame 4 on the base 3, so that the position of the bent portion 102 along the axis is positioned when the bent portion 102 is clamped by the first end portion 11 and the second end portion 21. Specifically, in this embodiment, there are two second convex portions 32 respectively corresponding to the first clamping arm 1 and the second clamping arm 2. Each second convex portion 32 includes a columnar structure installed in the base 3 and a spherical structure protruding towards the first clamping arm 1 or the second clamping arm 2. At the same time, the first clamping arm 1 or the second clamping arm 2 also includes a groove matching the hemisphere of the spherical body at the corresponding position of the second convex portion 32, so that when the first clamping arm 1 or the second clamping arm 2 contacts the second convex portion 32, slight positioning can be achieved by means of the geometric structure of the spherical body, which helps to correct the deviation that is not coaxial with the axis and makes the final positioning accuracy higher.

[0054] Further, when the bent portion 102 is clamped by the first end portion 11 and the second end portion 21, a part of the first end portion 11 and the second end portion 21 yields a yielding cavity for placing the bent portion 102, and the other part of the first end portion 11 and the second end portion 21 are mutually attached, so that on the basis of maintaining the stability of the positioning of the bent portion 102, the bent portion 102 is clamped in the yielding cavity of the limited space, and the size of the bent portion 102 matches the yielding cavity, avoiding the bent portion 102 being overly subjected to the extrusion force from the first end portion 11 and the second end portion 21 entirely, but making the force applied by the elastic element to the first clamping arm 1 and the second clamping arm 2 be converted into the force of the attachment between the first end portion 11 and the second end portion 21.

[0055] Furthermore, the locking block 6 is arranged to avoid the clamping area, and the locking block 6 is in contact with at least part of the rod portion 101 and the base 3, so that the locking block 6, the base 3, the rod portion 101, and the bending portion 102 are fixed to each other. Specifically, the locking block 6 can be made of a plastic material with a lower material strength than the rod portion 101 to avoid scratching the surface of the rod portion 101 when fixing the rod portion 101. At the same time, the locking block 6 is arranged as an annular structure that can be sleeved around the base 3 as a whole, and one side of the locking block 6 has a fastening member that can be tightened, so as to facilitate the operator to adjust the locking strength of the locking block 6 or realize the quick disassembly and assembly of the locking block 6.

[0056] Furthermore, as Figure 1 and Figure 3 shown, the support frame 4 further includes a limiting groove extending along the axial direction. The slider 5 includes a limiting pin 51 passing through the limiting groove, and the limiting groove limits the moving distance of the limiting pin 51 along the axial direction. Through the cooperative design of the limiting groove and the limiting pin 51, the moving distance of the slider 5 driving the first clamping arm 1 and the second clamping arm 2 along the axial direction can be limited, so that the movement of the first clamping arm 1 and the second clamping arm 2 is controllable. With the cooperation of the second protrusion 32 structure, the movement of the first clamping arm 1 and the second clamping arm 2 along the axial direction has higher accuracy.

[0057] Furthermore, the sides of the first clamping arm 1 and the second clamping arm 2 away from the slider 5 have concave patterns for easy gripping, so that the first clamping arm 1 and the second clamping arm 2 are easier to control in the case of manual operation.

[0058] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described by industry standards or embodiments. Some industry standards or implementation schemes slightly modified on the basis of the implementation described by the custom method or embodiment can also achieve the same, equivalent or similar, or predictable implementation effects as the above embodiments. The embodiments of applying these modified or deformed data acquisition, processing, output, judgment methods, etc. still fall within the scope of the optional implementation schemes of this application.

[0059] Although this application is depicted through embodiments, those of ordinary skill in the art know that this application has many deformations and changes without departing from the spirit of this application. It is hoped that the appended embodiments include these deformations and changes without departing from this application.

Claims

1. A needle positioning fixture for positioning the needle, wherein, The needle includes a shaft portion and a bent portion provided at one end of the shaft portion and bent along a direction not parallel to the extending direction of the shaft portion; characterized in that the needle positioning fixture includes: A base, on which there is an axially extending groove, and the size of the groove matches that of the shaft portion; A support frame, which is provided on one side of the base; A first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are movably connected to both sides of the support frame, the first clamping arm includes a first end for clamping the bent portion, and the second clamping arm includes a second end for clamping the bent portion, Wherein, a clamping area for allowing the bent portion, the first end and the second end to pass through is provided between the base and the support frame; The first clamping arm and the second clamping arm are rotatably connected to a slider, and the support frame is provided with an axially extending chute matching the slider, and the slider is slidably connected to the chute; The first end and the second end are oppositely arranged, and a first elastic component is provided between the first clamping arm and the slider, and a second elastic component is provided between the second clamping arm and the slider, so that when the slider slides to a preset position, the first end and the second end abut against each other in the clamping area; After the needle is fixed, it further includes a locking block sleeved on the base for fixing the needle and the base to each other.

2. The needle positioning fixture according to claim 1, wherein: The middle position of the first clamping arm is rotatably connected to the chute, and the first elastic component is arranged between the end of the first clamping arm away from the first end and the slider.

3. The needle positioning fixture according to claim 1, wherein: The middle position of the second clamping arm is rotatably connected to the chute, and the second elastic component is arranged between the end of the second clamping arm away from the first end and the slider.

4. The needle positioning jig according to claim 1, characterized in that: The support frame has a first convex portion protruding towards one end of the base. When the first end and the second end clamp the bent portion in the clamping area, the first clamping arm and the second clamping arm are limited by the first convex portion.

5. The needle positioning fixture according to claim 1, wherein: The base has a second convex portion protruding towards one end of the support frame. When the first end and the second end clamp the bent portion in the clamping area, the second convex portion limits the movement of the first clamping arm and the second clamping arm along the axis.

6. The needle positioning fixture according to claim 5, characterized in that: The second convex portion includes two spherical bodies, and the position of each spherical body corresponds to one of the first clamping arm and the second clamping arm.

7. The needle positioning fixture according to claim 1, wherein: The sides of the first clamping arm and the second clamping arm away from the slider have concave patterns for easy gripping.

8. The needle positioning fixture according to claim 1, wherein: The support frame further includes a limiting groove extending along the axis, the slider includes a limiting pin passing through the limiting groove, and the limiting groove limits the moving distance of the limiting pin along the axis.

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