Portable semi-automatic electrostatic spinning handheld device

Abstract

The utility model provides portable semi-automatic electrostatic spinning handheld equipment. The portable semi-automatic electrostatic spinning handheld equipment comprises a shell and a power supply device located below the shell. A liquid containing bin, an injector, a reset push plate, a high-pressure pack and a starting switch are sequentially arranged on the shell, an extension spring is further arranged on the shell, and the reset push plate is connected to the shell through the extension spring and used for pushing the injector to conduct electrostatic spinning. The equipment is improved on the basis of traditional manual liquid supply spinning equipment, a semi-automatic liquid supply mode combining an extension spring and a damping system is adopted, and the liquid supply stability is improved, so that the spinning efficiency is guaranteed; compared with existing handheld spinning equipment, single high-voltage power supply is smaller in size, convenient to carry, wide in application scene and easy to operate, and the service life is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spinning, in particular to a portable semi-automatic electrostatic spinning handheld device. Background Art

[0002] Electrospinning is one of the simplest and most efficient methods for preparing micro- and nanofibers. Compared with traditional nanomaterial preparation technologies, it has advantages such as simple processing equipment, a wide range of raw material sources, low spinning costs, and scalable preparation. In recent years, it has been widely studied and reported both domestically and internationally. Micro- and nanofibers prepared using electrospinning technology have excellent properties such as high specific surface area, large aspect ratio (i.e., length / diameter), and unique physical and chemical properties. They show great application potential in areas such as biological tissue engineering, wound dressings, filtration protection, drug release, and flexible devices. The principle of electrospinning is as follows: under the action of a high-voltage electric field, the polymer solution or melt at the spinning nozzle is ejected by the electrostatic field force to form a jet. The jet splits and stretches during its fall, and the solvent evaporates, forming micro- and nanofibers that solidify and deposit on the collecting electrode.

[0003] There is a portable electrospinning device in the prior art, such as a portable handheld electrospinning device disclosed in Chinese patent document CN102776583B, which includes an injection cylinder, a push rod, and a needle. Among them, a plug and a pressing head are fixed on the front and rear ends of the push rod respectively. The front end of the push rod extends into the injection cylinder, and the plug is sealed and slidably arranged on the inner wall of the injection cylinder. The plug and the part of the injection cylinder near the needle form a first cavity for placing the electrospinning solution, and the pressing head is located outside the injection cylinder. When using this electrospinning device, only pressure is applied to the pressing head to push the plug toward the needle, and the spinning solution in the first cavity can be injected out through the needle. However, the above-mentioned portable handheld electrospinning device simply relies on manually pushing the piston of the injection syringe, which is very strenuous for the operator to use after a long time. At the same time, in order to ensure the uniformity of spinning, this method requires uniform speed control of the injection propulsion speed, which places high demands on the user, resulting in the inconvenience of operating the electrospinning device.

[0004] In view of this, it is necessary to improve the electrospinning handheld device in the prior art to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to disclose a portable electrospinning instrument, which realizes stable and uniform liquid supply through a tension spring combined with a damping system. The high voltage output by the built-in high-voltage package is applied to the syringe needle, and the liquid flowing through the injection needle carries the electrostatic high voltage to form an electrospinning fiber membrane.

[0006] To achieve the above-mentioned objectives, the utility model provides a portable semi-automatic electrospinning handheld device, comprising a shell and a power supply device located below the shell; the shell is provided with a liquid storage chamber, a syringe, a reset push plate, a high-voltage package and a start switch in sequence, and the shell is also provided with a tension spring, which connects the reset push plate to the shell and is used to push the syringe for electrospinning.

[0007] In some embodiments, a trigger connected by a fixing pin is provided at the lower end of the reset push plate, and the trigger can rotate.

[0008] In some embodiments, a torsion spring is further provided on the reset push plate, and one end of the torsion spring is connected to the trigger through a spring fixing pin, and the other end is connected to the reset push plate.

[0009] In some embodiments, the bottom of the housing is provided with characteristic teeth, and the trigger is provided with ratchet teeth that engage with the characteristic teeth.

[0010] In some embodiments, the extension spring is installed inside the housing, the housing is provided with a first boss, the reset push plate is provided with a second boss, one end of the extension spring is connected to the first boss, and the other end is connected to the second boss.

[0011] In some embodiments, the high-voltage package is installed inside the shell, one end of the high-voltage package is connected to the power supply device, and the other end is connected to a shrapnel arranged at the bottom of the liquid storage chamber, and the shrapnel is connected to the needle of the syringe.

[0012] In some embodiments, the power supply device is a battery for supplying power to the high-voltage transformer, and the start switch controls the on / off of the power supply to the high-voltage transformer.

[0013] In some embodiments, a damping structure is further provided on the shell, and the damping structure includes a T-slot arranged at the rear end of the shell, a damping plate installed in the T-slot, and an adjusting nut. The T-slot and the damping plate form a sliding groove for the reset push plate to slide in the sliding groove.

[0014] In some embodiments, the adjusting nut is used to adjust the position of the damping plate in the T-slot to ensure that the reset push plate slides at a uniform speed under the action of the damping plate.

[0015] In some embodiments, a protective cover is provided at the front end of the housing, and the needle of the syringe is located at the center of the protective cover.

[0016] Compared with the existing technology, the beneficial effects of the present invention are: the equipment is improved on the basis of the traditional manual liquid supply spinning equipment, and uses a semi-automatic liquid supply method combining a tension spring and a damping system to improve the stability of the liquid supply and thus ensure the efficiency of spinning; the single high-voltage power supply is smaller in size than the existing handheld spinning equipment, is easy to carry, has a wide range of application scenarios, is simple to operate, and greatly improves the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a portable semi-automatic electrospinning handheld device shown in the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the portable semi-automatic electrospinning handheld device shown in the utility model;

[0019] Figure 3 This is a schematic diagram of the trigger structure of the portable semi-automatic electrospinning handheld device shown in the utility model;

[0020] Figure 4 This is a schematic diagram of the rear end structure of the portable semi-automatic electrospinning handheld device shown in the utility model;

[0021] Figure 5 This is a schematic diagram of the ratchet structure of the portable semi-automatic electrospinning handheld device shown in the utility model. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the various embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present invention.

[0023] like Figure 1-Figure 5 As shown, a portable semi-automatic electrospinning handheld device includes a shell 5 and a power supply device 7 located below the shell 5; the shell 5 is provided with a liquid chamber 2, a syringe 3, a reset push plate 4, a high-voltage package 11 and a start switch 6 in sequence, and the shell 5 is also provided with a tension spring 10, which connects the reset push plate 4 to the shell 5 and is used to push the syringe 3 for electrospinning.

[0024] The lower end of the reset push plate 4 is provided with a trigger 9 connected by a fixing pin 14, and the trigger 9 can rotate. The reset push plate 4 is also provided with a torsion spring 16, one end of the torsion spring 16 is connected to the trigger 9 through the spring fixing pin 8, and the other end is connected to the reset push plate 4.

[0025] The bottom of the housing 5 is provided with a characteristic tooth 52, and the trigger 9 is provided with a ratchet tooth 91 that meshes with the characteristic tooth 52. The characteristic tooth 52 engages with the ratchet tooth 91 on the trigger 9, thereby engaging the reset push plate 4. A tension spring 10 is mounted within the housing 5. The housing 5 is provided with a first boss 51, and the reset push plate 4 is provided with a second boss 41. One end of the tension spring 10 is connected to the first boss 51, and the other end is connected to the second boss 41.

[0026] The high-voltage transformer 11 is mounted within the housing 5. One end of the high-voltage transformer 11 is connected to the power supply 7, and the other end is connected to a spring 13 located at the bottom of the liquid storage chamber 2. The spring 13 is electrically connected to the needle of the syringe 3. The power supply 7 is a battery 12, which is used to power the high-voltage transformer 11. The high-voltage transformer 11 provides high-voltage static electricity for the spinning solution. The positive electrode of the output terminal is electrically connected to the needle of the syringe 3 through the spring 13. The liquid flowing through the needle is positively charged, creating a voltage drop. It is then ejected at a certain speed, forming nanofibers at the nozzle.

[0027] The housing 5 is also provided with a damping structure, which includes a T-slot 53 arranged at the rear end of the housing 5, a damping plate 18 installed in the T-slot, and an adjusting nut 17. The T-slot 53 and the damping plate 18 form a sliding groove for the reset push plate 4 to slide in the sliding groove.

[0028] The damping plate 18 plays a damping role by generating friction force by clamping the reset push plate 4. The adjusting nut 17 is used to adjust the position of the damping plate 18 in the T-slot 53 to ensure that the reset push plate 4 slides at a uniform speed under the action of the damping plate 18.

[0029] The front end of the housing 5 is provided with a protective cover 1, and the needle of the syringe 3 is located in the center of the protective cover 1. When electrospinning is performed, the protective cover 1 is located outside the needle, which can ensure that the spinning is carried out within a certain range and form a regular nanofiber membrane.

[0030] Working Principle: Trigger 9 is rotatably mounted on reset push plate 4 via fixing pin 14. The device's mechanical operation consists of two steps: a reset action and a firing action. To reset, reset push plate 4 is pulled back. At this point, ratchet teeth 91 of trigger 9, under the action of torsion spring 16, remain engaged with characteristic teeth 52 on the underside of housing 5. When pulled back to a predetermined position, ratchet teeth 91 on trigger 9 engage with characteristic teeth 52 on the underside of housing 5, and tension spring 10 is now in a stretched state. To fire, after loading liquid chamber 2, trigger 9 is pulled back. Rattle teeth 91 on trigger 9 disengage from characteristic teeth 52, and reset push plate 4, under the tension of tension spring 10, is pushed in the direction of movement of the plunger of syringe 3. The spinning solution in syringe 3 is ejected from the needle at a uniform speed by the tension spring 10 and the damping structure. High-voltage static electricity forms nanofibers at the nozzle.

[0031] During operation, the liquid chamber 2 is first flipped upward around the rotation axis, the syringe filled with spinning solution is loaded into the liquid chamber 2, and then flipped downward to install it in place. The reset push plate 4 is pulled back to the limit position. At this time, the ratchet 91 at the upper end of the trigger 9 is locked with the characteristic tooth 52 at the lower end of the housing 5 under the action of the torsion spring 16. The start switch 6 is pressed to start the high voltage. The lower end of the trigger 9 is pressed. At this time, the ratchet 91 at the upper end of the trigger 9 is separated from the characteristic tooth 52 at the lower end of the housing 5. The reset push rod 4 slides towards the syringe at a uniform speed under the action of the tension spring 10 and the damping structure, pushing the syringe push rod to eject the liquid in the syringe from the needle at a uniform speed, forming electrospun fibers under the action of high-voltage static electricity.

[0032] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0033] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A portable semi-automatic electrospinning handheld device, characterized in that: The invention comprises a shell (5) and a power supply device (7) located below the shell (5); the shell (5) is provided with a liquid storage chamber (2), a syringe (3), a reset push plate (4), a high-voltage package (11) and a start switch (6) in sequence; the shell (5) is also provided with a tension spring (10), and the tension spring (10) connects the reset push plate (4) to the shell (5) and is used to push the syringe (3) to perform electrostatic spinning.

2. The portable semi-automatic electrospinning handheld device according to claim 1, characterized in that: The lower end of the reset push plate (4) is provided with a trigger (9) connected via a fixing pin (14), and the trigger (9) can rotate.

3. The portable semi-automatic electrospinning handheld device according to claim 2, characterized in that: The reset push plate (4) is also provided with a torsion spring (16), one end of the torsion spring (16) is connected to the trigger (9) through a spring fixing pin (8), and the other end is connected to the reset push plate (4).

4. The portable semi-automatic electrospinning handheld device according to claim 3, characterized in that: The bottom of the housing (5) is provided with a characteristic tooth (52), and the trigger (9) is provided with a ratchet tooth (91) meshing with the characteristic tooth (52).

5. The portable semi-automatic electrospinning handheld device according to claim 1, characterized in that: The tension spring (10) is installed inside a housing (5), the housing (5) is provided with a first boss (51), the reset push plate (4) is provided with a second boss (41), one end of the tension spring (10) is connected to the first boss (51), and the other end is connected to the second boss (41).

6. The portable semi-automatic electrospinning handheld device according to claim 5, characterized in that: The high-voltage package (11) is installed inside the housing (5), one end of the high-voltage package (11) is connected to the power supply device (7), and the other end is connected to a spring (13) arranged at the bottom of the liquid storage chamber (2), and the spring (13) is connected to the needle of the syringe (3).

7. The portable semi-automatic electrospinning handheld device according to claim 6, characterized in that: The power supply device (7) is a storage battery (12) used to supply power to the high-voltage package (11), and the start switch (6) controls the on and off of the power supply to the high-voltage package.

8. The portable semi-automatic electrospinning handheld device according to claim 1, characterized in that: The housing (5) is also provided with a damping structure, which comprises a T-shaped slot (53) arranged at the rear end of the housing (5), a damping plate (18) installed in the T-shaped slot, and an adjusting nut (17); the T-shaped slot (53) and the damping plate (18) form a sliding slot for the reset push plate (4) to slide in the sliding slot.

9. The portable semi-automatic electrospinning handheld device according to claim 8, characterized in that: The adjusting nut (17) is used to adjust the position of the damping plate (18) in the T-slot (53) to ensure that the reset push plate (4) slides at a uniform speed under the action of the damping plate (18).

10. The portable semi-automatic electrospinning handheld device according to claim 1, characterized in that: A protective cover (1) is provided at the front end of the housing (5), and the needle of the syringe (3) is located at the center of the protective cover (1).

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