Electrostatic spinning device capable of switching near-field direct writing and far-field spraying

Abstract

The utility model relates to an electrostatic spinning device capable of switching near-field direct writing and far-field spraying, which comprises a power supply, a needle cylinder, a needle head, an angle adjusting module, a near-field receiving plate, a transverse roller and a position adjusting module, the needle cylinder and the needle head are connected with each other, and the power supply comprises a positive electrode and a negative electrode; the positive electrode is electrically connected to the needle, the needle is installed on the angle adjusting module, and the angle adjusting module is used for adjusting the angle of the needle; the negative electrode is selectively and electrically connected to the near-field receiving plate or the transverse roller, and when the negative electrode is electrically connected to the transverse roller, the transverse roller is configured to rotate; the position adjusting module is connected to the angle adjusting module, the near-field receiving plate and the transverse roller, the position adjusting module can drive the needle head to move in the first direction and the second direction through the angle adjusting module and enables the near-field receiving plate and the transverse roller to move in the third direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other.

Description

Technical Field

[0001] The present application relates to the technical field of electrospinning equipment, and particularly to an electrospinning device capable of switching between near-field direct writing and far-field spraying. Background Art

[0002] As an advanced nanomaterial preparation technology, electrospinning technology has achieved remarkable development in recent years in multiple fields. With the continuous growth of the demand for nanomaterials, electrospinning technology is also constantly innovating and improving. Electrospinning has two modes: near-field direct writing and far-field spraying, which are respectively characterized by fast spinning speed and precise positioning. However, traditional far-field spraying electrospinning and near-field direct writing electrospinning equipment are often incompatible. If relevant equipment is arranged in the laboratory at the same time, the floor area is large and the cost is high. Summary of the Utility Model

[0003] Based on this, in view of the problem of switching between the two modes of near-field direct writing and far-field spraying, it is necessary to provide an electrospinning device capable of switching between near-field direct writing and far-field spraying.

[0004] An electrospinning device capable of switching between near-field direct writing and far-field spraying includes:

[0005] A power supply, including a positive electrode and a negative electrode;

[0006] A needle, the positive electrode is electrically connected to the needle;

[0007] An angle adjustment module, the needle is installed on the angle adjustment module, and the angle adjustment module is used to adjust the angle of the needle;

[0008] A near-field receiving plate and a cross roller, the negative electrode is selectively electrically connected to the near-field receiving plate or the cross roller, and when the negative electrode is electrically connected to the cross roller, the cross roller is configured to rotate;

[0009] A position adjustment module, connected to the angle adjustment module, the near-field receiving plate and the cross roller, the position adjustment module can drive the needle to move along a first direction and a second direction through the angle adjustment module, and make the near-field receiving plate and the cross roller move along a third direction, where the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0010] The above-mentioned electrospinning device capable of switching between near-field direct writing and far-field spraying has two modes: near-field direct writing and far-field spraying. The positive electrode of the power supply is electrically connected to the needle, so that the needle is at a high potential, and the needle is installed on the angle adjustment module, and the angle of the needle is adjusted by using the angle adjustment module. When the near-field direct writing mode is required, the angle adjustment module drives the needle to move along the first direction and the second direction through the position adjustment module, and makes the near-field receiving plate move along the third direction, and the negative electrode of the power supply is electrically connected to the near-field receiving plate, so that the near-field receiving plate is at a low potential, and near-field direct writing electrospinning can be realized. When far-field spraying is required, the angle adjustment module drives the needle to move along the first direction and the second direction through the position adjustment module, and makes the cross roller move along the third direction. Finally, the negative electrode of the power supply is electrically connected to the cross roller, so that the cross roller is at a low potential, and when the negative electrode is connected to the cross roller, the cross roller is configured to rotate, and far-field spraying electrospinning can be realized. The electrospinning device capable of switching between near-field direct writing and far-field spraying provided by the present application has the function of quickly switching between near-field and far-field electrospinning, and has the advantages of small volume, safe operation process, low cost, and simple operation, and has a wide application space in scientific research scenarios that require small multi-functional and adjustable electrospinning. If the product can be transformed, it is expected that the product will provide new research ideas for front-line scientific researchers and open up a new electrospinning market.

[0011] In one embodiment, the angle adjustment module includes:

[0012] A rotating Hess tooth and a fixed Hess tooth that mesh with each other;

[0013] A first connecting shaft and a needle clamp, one end of the first connecting shaft is connected to the rotating Hess tooth, the other end passes through the fixed Hess tooth and is connected to the needle clamp, the needle is installed on the needle clamp, the rotating Hess tooth can be separated from the fixed Hess tooth, and the separated rotating Hess tooth can drive the first connecting shaft and the needle clamp to rotate to adjust the angle of the needle.

[0014] In one embodiment, the angle adjustment module further includes a rear cover and an elastic member, the rear cover is arranged on the side of the rotating Hess tooth facing away from the fixed Hess tooth, and an elastic member is clamped between the rear cover and the rotating Hess tooth.

[0015] In one embodiment, the angle adjustment module further includes a housing, and the rotating Hess tooth, the fixed Hess tooth, the rear cover and the elastic member are arranged in the housing.

[0016] In one embodiment, the position adjustment module includes a 3D printer, and the 3D printer is connected to the near-field receiving plate to drive the near-field receiving plate to move along the third direction;

[0017] The 3D printer includes a cross beam, the housing is connected to the cross beam, the angle adjustment module can move along the first direction on the cross beam, and the cross beam can drive the angle adjustment module to move synchronously along the second direction.

[0018] In one embodiment, the angle adjustment module further includes electrode clamp limit posts connected to the needle clamp. There are two electrode clamp limit posts, and the two electrode clamp limit posts are connected by a support post. The positive electrode clamp of the positive electrode is arranged between the two electrode clamp limit posts, and the positive electrode clamp is supported on the support post.

[0019] In one embodiment, the position adjustment module includes a slidingly mated guide rail and a slider. The guide rail extends along the third direction, and the slider is connected to the cross roller.

[0020] In one embodiment, scale lines are provided on the guide rail.

[0021] In one embodiment, a stop piece is provided at the end of the guide rail. The stop piece can abut against the slider to define the relative position between the guide rail and the slider.

[0022] In one embodiment, a syringe barrel and an injection pump are further included. The injection pump is connected to the needle through the syringe barrel. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an electrospinning device capable of switching between near-field direct writing and far-field spraying provided by an embodiment of the present application.

[0024] Figure 2 It is a schematic structural diagram of an angle adjustment module installed on a cross beam provided by an embodiment of the present application.

[0025] Figure 3 It is a schematic structural diagram of an angle adjustment module provided by an embodiment of the present application.

[0026] Figure 4 It is an exploded view of an angle adjustment module provided by an embodiment of the present application.

[0027] Figure 5 It is a schematic structural diagram of a positive electrode clamp clamping a needle provided by an embodiment of the present application.

[0028] Figure 6 It is a schematic structural diagram of a scale provided on a guide rail provided by an embodiment of the present application.

[0029] In the figure:

[0030] 100. Power supply; 110. Positive electrode clamp; 120. Negative electrode clamp;

[0031] 200, syringe barrel; 210, needle; 220, polytetrafluoroethylene tube;

[0032] 300, angle adjustment module; 310, rotating Hess teeth; 320, fixed Hess teeth; 330, first connecting shaft; 340, needle clamp; 350, rear cover; 351, limiting boss; 360, elastic member; 370, housing; 380, second connecting shaft; 390, electrode clamp limiting post; 391, support post;

[0033] 400, near-field receiving board;

[0034] 500, cross roller;

[0035] 600, 3D printer; 610, cross beam;

[0036] 700, guide rail; 710, slider; 720, scale line; 730, stop piece;

[0037] 800, injection pump. Detailed implementation manners

[0038] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0040] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0044] This application provides an electrospinning device capable of switching between near-field direct writing and far-field spraying, as Figures 1 to 6As shown in the figure, it includes a power supply 100, a needle 210, an angle adjustment module 300, a near-field receiving plate 400, a cross roller 500, and a position adjustment module. The power supply 100 includes a positive electrode and a negative electrode; the positive electrode is electrically connected to the needle 210, and the needle 210 is installed on the angle adjustment module 300, and the angle adjustment module 300 is used to adjust the angle of the needle 210; the negative electrode is selectively electrically connected to the near-field receiving plate 400 or the cross roller 500, and when the negative electrode is electrically connected to the cross roller 500, the cross roller 500 is configured to rotate; the position adjustment module is connected to the angle adjustment module 300, the near-field receiving plate 400, and the cross roller 500, and the position adjustment module can drive the needle 210 to move along a first direction and a second direction through the angle adjustment module 300, and make the near-field receiving plate 400 and the cross roller 500 move along a third direction, where the first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0045] The above-mentioned electrospinning device capable of switching between near-field direct writing and far-field spraying has two modes: near-field direct writing and far-field spraying. The positive electrode of the power supply 100 is electrically connected to the needle 210, so that the needle 210 is at a high potential, and the needle 210 is installed on the angle adjustment module 300, and the angle adjustment module 300 is used to adjust the angle of the needle 210. When the near-field direct writing mode is required, the position adjustment module is used to drive the needle 210 to move along the first direction and the second direction through the angle adjustment module 300, and make the near-field receiving plate 400 move along the third direction, and the negative electrode of the power supply 100 is electrically connected to the near-field receiving plate 400, so that the near-field receiving plate 400 is at a low potential, and near-field direct writing electrospinning can be realized. When far-field spraying is required, the position adjustment module is used to drive the needle 210 to move along the first direction and the second direction through the angle adjustment module 300, and make the cross roller 500 move along the third direction, and finally the negative electrode of the power supply 100 is electrically connected to the cross roller 500, so that the cross roller 500 is at a low potential, and when the negative electrode is connected to the cross roller 500, the cross roller 500 is configured to rotate, and far-field spraying electrospinning can be realized. The electrospinning device capable of switching between near-field direct writing and far-field spraying provided by the present application has the function of quickly switching between near-field and far-field electrospinning, and has the advantages of small volume, safe operation process, low cost, and simple operation, and has a wide application space in scientific research scenarios that require small multi-functional and adjustable electrospinning. If the product transformation can be realized, it is expected that the product will provide new research ideas for front-line scientific researchers and open up a new electrospinning market.

[0046] Specifically, for the electrospinning device capable of switching between near-field direct writing and far-field spraying of the present application, when the near-field direct writing mode is carried out, after operating to make the near-field receiving plate 400 at a low potential, high-precision patterned near-field direct writing electrospinning can be realized by means of CAD software and related slicing software.

[0047] Specifically, the power supply 100 is connected to the needle 210 through the positive electrode clip 110, and the power supply 100 is connected to the near-field receiving plate 400 or the cross roller 500 through the negative electrode clip 120.

[0048] More specifically, in this embodiment, two negative electrode clips 120 are provided, and the two negative electrode clips 120 are respectively used to clamp the near-field receiving plate 400 and the cross roller 500. It should be noted that when the near-field direct writing mode is performed, the negative electrode clip 120 is separated from the cross roller 500, and when the far-field spraying mode is performed, the negative electrode clip 120 is separated from the near-field receiving plate 400.

[0049] In other embodiments, one negative electrode clip 120 is provided, and the negative electrode clip 120 selects the object to be clamped according to the operation mode.

[0050] Furthermore, it further includes a syringe 200 and an injection pump 800. The injection pump 800 is connected to the syringe 200 through the syringe 200. Connecting the injection pump 800 to the syringe 200 facilitates injecting the spinning solution into the syringe 200, and connecting the syringe 200 and the needle 210 facilitates introducing the spinning solution into the needle 210.

[0051] Specifically, the syringe 200 is connected to the needle 210 through a polytetrafluoroethylene tube 220, so as to introduce the spinning solution into the needle 210.

[0052] Furthermore, the angle adjustment module 300 includes a rotating Hess gear 310 and a fixed Hess gear 320 that mesh with each other, a first connecting shaft 330, and a needle holder 340. One end of the needle holder 340 is connected to the rotating Hess gear 310, and the other end passes through the fixed Hess gear 320 and is connected to the needle holder 340. The needle 210 is installed on the needle holder 340. The rotating Hess gear 310 can be separated from the fixed Hess gear 320, and the separated rotating Hess gear 310 can drive the first connecting shaft 330 and the needle holder 340 to rotate to adjust the angle of the needle 210. By meshing the rotating Hess gear 310 and the fixed Hess gear 320, the first connecting shaft 330 and the needle holder 340 are fixed, and thus the position of the needle 210 is fixed. When the rotating Hess gear 310 is separated from the fixed Hess gear 320, rotate the rotating Hess gear 310, thereby driving the first connecting shaft 330 and the needle holder 340 to rotate, and further driving the needle 210 to rotate to adjust the angle of the needle 210.

[0053] Specifically, the needle holder 340 is connected to the first connecting shaft 330 through a second connecting shaft 380.

[0054] Specifically, the angle adjustment module 300 further includes a rear cover 350 and an elastic member 360. The rear cover 350 is disposed on the side of the rotating Hess gear 310 away from the fixed Hess gear 320, and the elastic member 360 is sandwiched between the rear cover 350 and the rotating Hess gear 310. By providing the elastic member 360 between the rear cover 350 and the rotating Hess gear 310 and squeezing the elastic member 360, the rotating Hess gear 310 is separated from the fixed Hess gear 320 to disengage the meshing. At this time, the needle 210 can freely rotate on the needle clamp 340 to adjust the angle. When the squeezing external force disappears, the elastic member 360 resets and squeezes the rotating Hess gear 310, causing the rotating Hess gear 310 and the fixed Hess gear 320 to mesh again. At this time, due to the characteristics of the Hess gear, the gears will fix themselves at an angle and lock with each other, and the output of the spinning solution is not affected.

[0055] Specifically, the elastic member 360 includes a spring.

[0056] Specifically, the rear cover 350 is provided with a limiting boss 351, and both ends of the elastic member 360 are respectively abutted against the limiting boss 351 and the end face of the rotating Hess gear 310.

[0057] Specifically, the angle adjustment module 300 further includes a housing 370. The rotating Hess gear 310, the fixed Hess gear 320, the rear cover 350, and the elastic member 360 are disposed inside the housing 370. By providing the housing 370 and sleeving it outside the moving Hess gear, the fixed Hess gear 320, the rear cover 350, and the elastic member 360, the moving Hess gear, the fixed Hess gear 320, the rear cover 350, and the elastic member 360 are protected.

[0058] Specifically, the angle adjustment module 300 further includes electrode clamp limiting posts 390 connected to the needle clamp 340. There are two electrode clamp limiting posts 390, and the two electrode clamp limiting posts 390 are connected by a support column 391. The positive electrode clamp 110 of the positive electrode is disposed between the two electrode clamp limiting posts 390, and the positive electrode clamp 110 is supported on the support column 391. The two electrode clamp limiting posts 390 are connected by the support column 391, and the two electrode clamp limiting posts 390 and the support column 391 enclose a space to limit the positive electrode clamp 110.

[0059] More specifically, the main function of the needle clamp 340 is to fix the needle 210 to prevent the needle 210 or the electrode from coming out during the movement. The needle clamp 340 is provided with a gap corresponding to the needle 210, and the needle 210 can be directly inserted and fixed by using the mortise and tenon structure.

[0060] Further, the position adjustment module includes a 3D printer 600, which is connected to the near-field receiving board 400 to drive the near-field receiving board 400 to move along the third direction; the 3D printer 600 includes a cross beam 610, the housing 370 is connected to the cross beam 610, and the angle adjustment module 300 can move along the first direction on the cross beam 610, and the cross beam 610 can drive the angle adjustment module 300 to move synchronously along the second direction. Connecting the housing 370 of the angle adjustment module 300 to the cross beam 610 of the 3D printer 600, the angle adjustment module 300 can move along the first direction on the cross beam 610, so that the needle 210 moves along the first direction, and the cross beam 610 can drive the angle adjustment module 300 to move synchronously along the second direction, so that the needle 210 moves along the second direction. And the 3D printer 600 can also drive the near-field receiving board 400 to move along the third direction.

[0061] Specifically, the position adjustment module includes a guide rail 700 and a slider 710 that are slidably mated. The guide rail 700 extends along the third direction, and the slider 710 is connected to the cross roller 500. By providing the slidably mated guide rail 700 and slider 710, connecting the slider 710 to the cross roller 500, and sliding the slider 710 along the guide rail 700, the cross roller 500 is driven to slide along the third direction, enabling the user to independently adjust the spraying distance.

[0062] More specifically, the rotating shaft of the cross roller 500 is connected to the slider 710 through a column.

[0063] Specifically, an electrode is attached to the outside of the cross roller 500 for the electrode clamp to be positioned, so that the cross roller 500 is at a low potential, and a motor is built into the cross roller 500 to achieve the function of rotary collection.

[0064] Specifically, scale lines 720 are provided on the guide rail 700. The scale lines 720 can not only be used to represent the sliding distance of the slider 710, but also represent the horizontal distance between the slider 710 and the needle 210.

[0065] Specifically, a stop piece 730 is provided at the end of the guide rail 700. The stop piece 730 can abut against the slider 710 to limit the relative position of the guide rail 700 and the slider 710. By providing the stop piece 730 at the end of the guide rail 700, the slider 710 is prevented from sliding out of the guide rail 700.

[0066] More specifically, stop pieces 730 are provided at both ends of the guide rail 700.

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0068] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An electrospinning device capable of switching between near-field direct writing and far-field jetting, characterized in that: include: A power source (100), comprising a positive electrode and a negative electrode; A needle (210), the positive electrode being electrically connected to the needle (210); An angle adjustment module (300), the needle (210) being mounted on the angle adjustment module (300), and the angle adjustment module (300) being used to adjust the angle of the needle (210); A near-field receiving plate (400) and a transverse roller (500), wherein the negative electrode is selectively electrically connected to the near-field receiving plate (400) or the transverse roller (500), and when the negative electrode is electrically connected to the transverse roller (500), the transverse roller (500) is configured to rotate; A position adjustment module is connected to the angle adjustment module (300), the near-field receiving plate (400) and the transverse roller (500), and the position adjustment module can drive the needle (210) to move along a first direction and a second direction through the angle adjustment module (300), and make the near-field receiving plate (400) and the transverse roller (500) move along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

2. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 1, characterized in that: The angle adjustment module (300) comprises: A rotating Hess tooth (310) and a fixed Hess tooth (320) meshing with each other; A first connecting shaft (330) and a needle clamp (340), wherein one end of the first connecting shaft (330) is connected to the rotating Hess tooth (310), and the other end passes through the fixed Hess tooth (320) and is connected to the needle clamp (340), the needle (210) is mounted on the needle clamp (340), the rotating Hess tooth (310) can be separated from the fixed Hess tooth (320), and the rotating Hess tooth (310) after separation can drive the first connecting shaft (330) and the needle clamp (340) to rotate so as to adjust the angle of the needle (210).

3. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 2, characterized in that: The angle adjustment module (300) further comprises a rear cover (350) and an elastic member (360); the rear cover (350) is arranged on a side of the rotating Hess tooth (310) away from the fixed Hess tooth (320); and the elastic member (360) is sandwiched between the rear cover (350) and the rotating Hess tooth (310).

4. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 3, characterized in that: The angle adjustment module (300) further comprises a housing (370), and the rotating Hess gear (310), the fixed Hess gear (320), the rear cover (350) and the elastic member (360) are arranged in the housing (370).

5. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 4, characterized in that: The position adjustment module comprises a 3D printer (600), and the 3D printer (600) is connected to the near-field receiving plate (400) to drive the near-field receiving plate (400) to move along the third direction; The 3D printer (600) comprises a crossbeam (610), the housing (370) is connected to the crossbeam (610), the angle adjustment module (300) can move along the first direction on the crossbeam (610), and the crossbeam (610) can drive the angle adjustment module (300) to move synchronously along the second direction.

6. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 2, characterized in that: The angle adjustment module (300) also includes an electrode clamp limiting column (390) connected to the needle clamp (340), two electrode clamp limiting columns (390) are provided, and the two electrode clamp limiting columns (390) are connected through a support column (391), the positive electrode clamp (110) of the positive electrode is provided between the two electrode clamp limiting columns (390), and the positive electrode clamp (110) is supported on the support column (391).

7. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 1, characterized in that: The position adjustment module comprises a guide rail (700) and a slider (710) that are slidably matched, the guide rail (700) extending along the third direction, and the slider (710) connected to the transverse roller (500).

8. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 7, characterized in that: The guide rail (700) is provided with scale lines (720).

9. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 7, characterized in that: A blocking piece (730) is provided at the end of the guide rail (700), and the blocking piece (730) can abut against the sliding block (710) to limit the relative position of the guide rail (700) and the sliding block (710).

10. The electrospinning device capable of switching between near-field direct writing and far-field jetting according to claim 1, characterized in that: It also includes a syringe (200) and a syringe pump (800), wherein the syringe pump (800) is connected to the needle (210) via the syringe (200).

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