Capillary tube driving structure

Abstract

The utility model discloses a capillary tube driving structure, which belongs to the field of automatic micromachining and is characterized in that a rotating shaft is rotatably mounted on an adapter assembly, and the output end of a rotary driving part is in transmission connection with the rotating shaft through a transmission assembly so that the rotary driving part can drive the rotating shaft to rotate relative to the adapter assembly; the rotating shaft comprises a rotating shaft main body and a spring plunger mounted on the rotating shaft main body, the rotating shaft main body is rotationally mounted on the switching assembly, the spring plunger is buckled with a groove in the outer wall of the needle holder to enable the needle holder and the rotating shaft to be coaxial, and through the design, the rotating driving piece drives the capillary tube to rotate, and the rotating angle is controllable; and the spring plunger is buckled with the groove on the outer wall of the needle holder, so that the axial positioning of the needle holder is stable, and the adjusting efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automatic microfabrication, especially to capillary driving structure. BACKGROUND

[0002] In the process of in vitro fertilization (IVF) cell nuclear transplantation, capillary glass tubes are widely used in various micro operations, such as sperm injection, oocyte processing, etc. These operations require capillary glass tubes to have specific shapes and sizes to ensure the accuracy and effectiveness of the operation. In order to meet these requirements, capillary glass tubes often need to be calcined.

[0003] In order to successfully break the cell membrane and achieve the addition or transfer of substances inside the membrane, the tip of the capillary glass tube has a sharp bevel. When bending the capillary tube, the bevel needs to be turned towards the light source. Because the capillary tube has good transparency, it is not possible to distinguish whether the bevel is facing the lens or away from it, so in actual operation, the capillary tube needs to be rotated first so that the bevel faces the side, at which point the image can clearly distinguish the direction of the bevel, and then rotated multiple times so that the bevel faces the light source. The existing capillary tube processing equipment is manually operated and can only manually rotate the capillary tube to adjust the bevel direction. However, the existing capillary tube clamping structure has weak freedom constraints, the coaxiality between the capillary tube and the needle holder is poor, the operator directly holds the needle holder during rotation, the needle tip displacement is large, and the rotation angle is uncontrollable. The capillary glass tube needle tip diameter is very small, generally below 10 μm, and the bevel needs to be clearly observed under a high magnification objective lens. However, the field of view is small under high magnification, and the needle tip can easily move out of the field of view during rotation, so the operation of "rotating the needle - finding the needle tip under low magnification - confirming the direction of the needle tip under high magnification" needs to be repeated, which is very inefficient. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a capillary driving structure with controllable rotation angle and high adjustment efficiency.

[0005] One of the purposes of the utility model is achieved by adopting the following technical solutions:

[0006] The capillary driving structure comprises a needle holder for mounting a capillary, a rotating driving member, a transmission assembly, a rotating shaft and an adapter assembly, the rotating driving member is fixedly installed on the adapter assembly, the rotating shaft is rotatably installed on the adapter assembly, the output end of the rotating driving member is in transmission connection with the rotating shaft through the transmission assembly, so that the rotating driving member can drive the rotating shaft to rotate relative to the adapter assembly, the rotating shaft comprises a rotating shaft body and a spring plunger installed on the rotating shaft body, the rotating shaft body is rotatably installed on the adapter assembly, and the spring plunger is buckled with a groove in the outer wall of the needle holder, so that the needle holder is coaxial with the rotating shaft.

[0007] Further, the transmission assembly comprises a driving wheel, a driven wheel and a belt, the driving wheel is fixed on the output end of the rotating driving member, the driven wheel is fixedly connected with the rotating shaft, and the belt is sleeved on the driving wheel and the driven wheel.

[0008] Further, the capillary driving structure further comprises a stop nut, the outer wall of the rotating shaft body is provided with a thread, the stop nut is installed on the rotating shaft body and matched with the thread, and the stop nut is located between the adapter assembly and the driven wheel to axially limit the rotating shaft body.

[0009] Further, the capillary driving structure further comprises a position detection assembly, the position detection assembly comprises an optical coupler and a baffle, the optical coupler is fixed on the adapter assembly, and the baffle is fixed on the rotating shaft body, the baffle rotates with the rotating shaft body to trigger the optical coupler.

[0010] Further, the baffle is circular, the edge of the baffle is provided with a zero position groove, and the zero position groove rotates to trigger the optical coupler.

[0011] Further, the bottom end of the rotating shaft body is provided with a guide groove.

[0012] Further, the adapter assembly comprises an adapter plate, a first bearing seat, a second bearing seat and a third bearing seat, the first bearing seat, the second bearing seat and the third bearing seat are fixed on the adapter plate, the second bearing seat and the third bearing seat are coaxially arranged, the rotating shaft is rotatably installed on the second bearing seat and the third bearing seat, and the rotating driving member is fixed on the first bearing seat.

[0013] Further, the capillary driving structure further comprises a vertical driving assembly, the vertical driving assembly comprises a vertical driving member, a second mounting seat and a second sliding block, the vertical driving member is installed on the second mounting seat, the second sliding block is installed on the output end of the vertical driving member, and the adapter plate is fixed on the second sliding block.

[0014] Further, the capillary driving structure further comprises a translation driving assembly, the translation driving assembly comprises a translation driving piece, a first mounting base and a first slider, the translation driving piece is installed on the first mounting base, and the first slider is fixedly installed on an output end of the translation driving assembly.

[0015] Further, the capillary driving structure further comprises a support, the support is in an inverted U shape, and the first mounting base is fixed to a top end of the support.

[0016] Compared with the prior art, the rotation shaft of the capillary driving structure is rotationally installed on the adapter assembly, the output end of the rotary driving piece is in transmission connection with the rotation shaft through the transmission assembly, so that the rotary driving piece can drive the rotation shaft to rotate relative to the adapter assembly, the rotation shaft comprises a rotation shaft main body and a spring plunger installed on the rotation shaft main body, the rotation shaft main body is rotationally installed on the adapter assembly, and the spring plunger is buckled with the groove in the outer wall of the needle holder, so that the needle holder is coaxial with the rotation shaft, through the above design, the rotary driving piece drives the capillary to rotate, and the rotation angle is controllable; the spring plunger is buckled with the groove in the outer wall of the needle holder, so that the axial positioning of the needle holder is stable, and the adjustment efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the capillary driving structure of the utility model;

[0018] Figure 2 It is Figure 1 a partial structure schematic view of the capillary driving structure;

[0019] Figure 3 It is Figure 1 another partial structure schematic view of the capillary driving structure;

[0020] Figure 4 It is Figure 3 another perspective view of the capillary driving structure from another angle;

[0021] Figure 5 It is Figure 1 still another partial structure perspective view of the capillary driving structure.

[0022] In the figure: 10, support; 20, translation driving assembly; 21, translation driving piece; 22, first mounting seat; 23, first sliding block; 30, fixing frame; 31, fixing plate; 32, reinforcing plate; 40, vertical driving assembly; 41, vertical driving piece; 42, second mounting seat; 43, second sliding block; 50, adapter assembly; 51, adapter plate; 52, first bearing seat; 53, second bearing seat; 54, third bearing seat; 55, bearing; 60, rotation driving piece; 70, transmission assembly; 71, driving wheel; 72, driven wheel; 73, belt; 80, rotating shaft; 81, rotating shaft body; 810, guide groove; 82, spring plunger; 90, position detection assembly; 91, rod body; 92, optocoupler; 93, baffle; 930, zero position groove; 100, needle holder; 110, capillary; 120, stop nut. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or can be fixed thereto via a further intermediate component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or can be connected thereto via a further intermediate component. When a component is referred to as being "disposed" on another component, it can be directly on the other component or can be disposed thereon via a further intermediate component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] The capillary driving structure of the utility model is used for driving the capillary 110 to make the capillary 110 reach a preset position and the tip inclined surface of the capillary 110 rotate to a preset angle.

[0027] Please refer to Figure 1The capillary driving structure comprises a bracket 10, a translation driving assembly 20, a fixing frame 30, a vertical driving assembly 40, an adapter assembly 50, a rotary driving member 60, a transmission assembly 70, a rotating shaft 80, a position detecting assembly 90, a needle holder 100 and a stop nut 120. The translation driving assembly 20 is used to drive the capillary 110 to move in a horizontal plane towards a first direction, the vertical driving assembly 40 is used to drive the capillary 110 to move in a vertical direction, and the rotary driving member 60 is used to drive the capillary 110 to rotate.

[0028] The bracket 10 is in an inverted U shape so that the tip of the capillary 110 is suspended. The translation driving assembly 20, the fixing frame 30, the vertical driving assembly 40, the adapter assembly 50, the rotary driving member 60, the transmission assembly 70, the rotating shaft 80, the position detecting assembly 90, the needle holder 100 and the stop nut 120 are installed on the bracket 10. The bottom of the bracket 10 forms a space for installing a light source module.

[0029] The translation driving assembly 20 is a linear module or a cylinder. Please continue to refer to Figure 2 In this embodiment, the translation driving assembly 20 comprises a translation driving member 21, a first mounting seat 22 and a first sliding block 23. The first mounting seat 22 is fixed to the bottom of the bracket 10, the translation driving member 21 is installed on the first mounting seat 22, and the first sliding block 23 is fixed to the output end of the translation driving member 21 and is in sliding connection with the first mounting seat 22. The translation driving member 21 drives the first sliding block 23 to slide relative to the first mounting seat 22 in a first direction.

[0030] The fixing frame 30 is used to mount the vertical driving assembly 40 on the first sliding block 23 of the translation driving assembly 20. Specifically, the fixing frame 30 comprises a fixed plate 31 and a reinforcing plate 32. The fixed plate 31 is in an L shape, and the reinforcing plate 32 is obliquely arranged and has two ends fixed to the two sides of the fixed plate 31 respectively so that the fixing frame 30 is in a triangular structure, thereby increasing the structural strength of the fixing frame 30.

[0031] The vertical driving assembly 40 is a linear module or a cylinder. Specifically, in this embodiment, the vertical driving assembly 40 comprises a vertical driving member 41, a second mounting seat 42 and a second sliding block 43. The second mounting seat 42 is fixed to the fixed plate 31 of the fixing frame 30, the vertical driving member 41 is installed on the second mounting seat 42, and the second sliding block 43 is fixed to the output end of the vertical driving member 41 and is in sliding connection with the second mounting seat 42.

[0032] Please continue to refer to Figure 3The adapter assembly 50 comprises an adapter plate 51, a first bearing seat 52, a second bearing seat 53, a third bearing seat 54, and bearings 55. The adapter plate 51 is fixed to the second sliding block 43, the first bearing seat 52, the second bearing seat 53, and the third bearing seat 54 are all fixed to the adapter plate 51 and perpendicular to the adapter plate 51. The second bearing seat 53 and the third bearing seat 54 are coaxially arranged, the first bearing seat 52 is used for installing a rotary driving member 60, and the second bearing seat 53 and the third bearing seat 54 are used for installing a rotating shaft 80. The number of bearings 55 is two, and the two bearings 55 are respectively installed in the second bearing seat 53 and the third bearing seat 54. In this embodiment, the bearings 55 are deep groove ball bearings.

[0033] The rotary driving member 60 is a motor, and the rotary driving member 60 is fixed to the first bearing seat 52.

[0034] The transmission assembly 70 is a gear transmission or a belt transmission. Please continue to refer to Figure 4 In this embodiment, the transmission assembly 70 comprises a driving wheel 71, a driven wheel 72, and a belt 73, the driving wheel 71 is fixed to the output end of the rotary driving member 60, the driven wheel 72 is fixed to the rotating shaft 80, the belt 73 is sleeved on the driving wheel 71 and the driven wheel 72, the rotary driving member 60 drives the driven wheel 72 to rotate through the driving wheel 71, the belt 73, and the driven wheel 72, thereby driving the rotating shaft 80 to rotate.

[0035] Please continue to refer to Figure 5 The rotating shaft 80 comprises a rotating shaft body 81 and a plurality of spring plungers 82 installed on the rotating shaft body 81, the rotating shaft body 81 is a hollow structure and is used for installing a needle holder 100. The spring plungers 82 are used for buckling with the surface groove of the needle holder 100, and maintaining the coaxiality of the needle holder 100 and the rotating shaft 80. The bottom of the rotating shaft body 81 is provided with a guide groove 810 for guiding the needle holder 100 to be installed into the rotating shaft 80.

[0036] Please continue to refer to Figure 3 and Figure 4 The position detection assembly 90 comprises a rod body 91, an optical coupler 92, and a baffle 93. The rod body 91 is fixed to the adapter plate 51, and the optical coupler 92 is fixed to the end of the rod body 91. The baffle 93 is fixed to the top of the rotating shaft body 81 by a key. The baffle 93 rotates with the rotating shaft body 81 to trigger the optical coupler 92. Specifically, in this embodiment, the baffle 93 is circular, and the baffle 93 is provided with a zero position groove 930 at the edge, and the zero position groove 930 triggers the optical coupler 92 to generate a zero position signal when the zero position groove 930 rotates to the optical coupler 92.

[0037] The needle holder 100 is installed in the rotating shaft 80 and is coaxially arranged with the rotating shaft 80, and the needle holder 100 is used for installing a capillary tube 110.

[0038] The stop nut 120 is installed on the surface of the rotating shaft body 81 through threads, and is located between the second bearing seat 53 and the driven wheel 72 to axially limit the rotating shaft body 81.

[0039] When the capillary driving structure is used, the capillary 110 is first manually installed into the needle holder 100. The tail of the capillary 110 is inserted into the needle holder 100 from the hole of the front section, and the hole is designed with a chamfer to facilitate the insertion of the capillary 110. The capillary 110 passes through the front section and the middle section and is inserted into the silicone tube of the rear section and is tightly held by the silicone tube to realize axial positioning. If the capillary 110 is too long, it can pass through the silicone tube and the hollow locking screw. At the same time, the mechanism is designed with a tool, and the total length of the capillary 110 and the needle holder 100 is graded and divided by the grid on the tool block, and the divided information can be input into the software control system. In the subsequent automatic processing process, the length can be automatically compensated to realize the rapid positioning of the tip of the capillary 110.

[0040] After the capillary 110 and the needle holder 100 are assembled, the needle holder 100 needs to be installed into the rotating shaft 80. The bottom of the rotating shaft 80 has a guide groove 810, and when the rotating shaft 80 rotates to the zero position, the guide groove 810 is opposite to the operator. The operator puts the tail of the needle holder 100 into the guide groove 810, and then pushes it into the rotating shaft 80 along the guide groove 810. When the positioning groove on the outer circumference of the needle holder 100 passes through the spring plunger 82 on the rotating shaft 80, the spring plunger 82 will be felt to be clamped into the positioning groove. When the spring plunger 82 is felt to be clamped into the positioning groove for the second time, it means that the needle holder 100 is loaded.

[0041] After the capillary 110 and the needle holder 100 are loaded, the electric control adjustment of the needle tip position and direction can be started. With the excellent coaxiality design and positioning design of each mechanism, when the translation driving assembly 20 and the vertical driving assembly 40 drive the capillary 110 to move to a fixed coordinate, the capillary 110 appears in the field of view of the main visual microscopic light path. Fine adjustment of the vertical driving assembly 40 can make the needle tip appear in the field of view. With the feedback control of the microscopic light path, high-resolution camera and image recognition software, the mechanism can automatically realize accurate positioning and rapid rotation of the capillary 110. During the rotation process, the capillary 110 rotates quantitatively, which is convenient to use, accurate in positioning, greatly simplifies the focusing and alignment action process of the capillary 110, shortens the operation time, and improves the consistency and efficiency of the processing effect.

[0042] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvement evolutions can be made, which are equivalent modification and evolution of the above embodiments according to the utility model essential technology, and these all belong to the protection range of the utility model.

Claims

1. A capillary drive structure comprising a needle holder for mounting a capillary, characterised in that: The capillary driving structure further comprises a rotating driving member, a transmission assembly, a rotating shaft and an adapter assembly, the rotating driving member is fixedly installed on the adapter assembly, the rotating shaft is rotatably installed on the adapter assembly, the output end of the rotating driving member is in transmission connection with the rotating shaft through the transmission assembly, so that the rotating driving member can drive the rotating shaft to rotate relative to the adapter assembly, the rotating shaft comprises a rotating shaft body and a spring plunger installed on the rotating shaft body, the rotating shaft body is rotatably installed on the adapter assembly, and the spring plunger is buckled with the groove of the needle holder outer wall, so that the needle holder is coaxial with the rotating shaft.

2. The capillary drive structure of claim 1, wherein: The transmission assembly comprises a driving wheel, a driven wheel and a belt, the driving wheel is fixed on the output end of the rotating driving member, the driven wheel is fixedly connected with the rotating shaft, and the belt is sleeved on the driving wheel and the driven wheel.

3. The capillary drive structure of claim 2, wherein: The capillary driving structure further comprises a stop nut, the rotating shaft body outer wall is provided with a thread, the stop nut is installed on the rotating shaft body and matched with the thread, and the stop nut is located between the adapter assembly and the driven wheel to axially limit the rotating shaft body.

4. The capillary drive structure of claim 1, wherein: The capillary driving structure further comprises a position detection assembly, the position detection assembly comprises an optical coupler and a baffle, the optical coupler is fixed on the adapter assembly, and the baffle is fixed on the rotating shaft body, the baffle rotates with the rotating shaft body to trigger the optical coupler.

5. The capillary drive structure of claim 4, wherein: The baffle is circular, the baffle edge is provided with a zero position groove, and the zero position groove rotates to the optical coupler to trigger the optical coupler.

6. The capillary drive structure of claim 1, wherein: The bottom end of the rotating shaft body is provided with a guide groove.

7. The capillary drive structure of claim 1, wherein: The adapter assembly comprises an adapter plate, a first bearing seat, a second bearing seat and a third bearing seat, the first bearing seat, the second bearing seat and the third bearing seat are fixed on the adapter plate, the second bearing seat and the third bearing seat are coaxially arranged, the rotating shaft is rotatably installed on the second bearing seat and the third bearing seat, and the rotating driving member is fixed on the first bearing seat.

8. The capillary drive structure of claim 7, wherein: The capillary driving structure further comprises a vertical driving assembly, the vertical driving assembly comprises a vertical driving member, a second mounting seat and a second sliding block, the vertical driving member is installed on the second mounting seat, and the second sliding block is installed on the output end of the vertical driving member.

9. The capillary drive structure of claim 8, wherein: The capillary driving structure further comprises a translation driving assembly, the translation driving assembly comprises a translation driving member, a first mounting seat and a first sliding block, the translation driving member is installed on the first mounting seat, and the first sliding block is fixedly installed on the output end of the translation driving assembly, the second mounting seat is fixed on the first sliding block.

10. The capillary drive structure of claim 9, wherein: The capillary driving structure further comprises a bracket, the bracket is inverted U-shaped, and the first mounting seat is fixed on the top end of the bracket.

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