Negative pressure generating device and application

Abstract

The invention discloses a negative pressure generating device and application, the device comprises a body and a holding part connected to the body, an opening is formed in the top end of the body, a plurality of through holes are formed in the bottom end of the body, a wall surface is connected between the opening and the through holes, and a cavity is formed in the wall surface from the opening to the through holes; the body is also provided with a control module which is arranged outside the wall surface; the stock bin is of a cylindrical structure without a top cover; a plurality of small holes are formed in the cylinder bottom; a lifting module is arranged on the stock bin and connected with a driving mechanism so that the stock bin can ascend or descend in the cavity. The driving mechanism is connected with the control module; one end of the holding part is communicated with the bottom end of the body, and the other end of the holding part is a negative pressure acting opening. The negative pressure generating device is simple in structure and convenient to use, and the negative pressure acting opening in the bottom of the device can be accurately matched with all parts of the body and used for generating negative pressure on the parts of the body. The control module displaces the lifting module, so that the stock bin is close to or far away from the negative pressure acting opening, and automatic temperature control near the negative pressure acting opening is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a negative pressure generating device and its application. Background Art

[0002] Currently, existing negative pressure generating devices (such as traditional cupping jars, fire dragon jars, etc.) mostly adopt an integrated glass, ordinary plastic or metal tank body. Among them, glass products are fragile and have poor portability; ordinary plastics (such as PLA, ABS) have insufficient high-temperature resistance (heat-resistant temperature ≤ 100 °C) and cannot withstand high-temperature environments such as the burning of moxa sticks (400 - 500 °C), resulting in material deformation or release of harmful substances; although metal materials are heat-resistant, their thermal conductivity is high (for example, the thermal conductivity of iron is 58 W / m·K), and heat is easily conducted to the surface of the tank body quickly, making it difficult to control the temperature. It is necessary to rely on the operator to manually control the negative pressure or temperature (such as adjusting the temperature by burning moxa sticks), which requires high operating skills and is difficult for non-professionals to accurately control; moreover, it lacks a modular design and cannot flexibly replace components according to the usage scenarios (such as at home, in medical treatment), and the use is significantly limited. In addition, the temperature control of existing devices relies on empirical judgment, and it is easy to fail to achieve the expected effect or cause scalding due to uneven temperature; the metal tank body structure is heavy and the processing cost is high, and the connection method between the tank body and the heating component has poor sealing performance and insufficient negative pressure stability; traditional preparation methods rely on mold injection or manual processing, with complex processes, low production efficiency, and it is difficult to achieve high-precision molding of complex structures (such as multi-chambers, precision threaded interfaces). Due to insufficient strength, for composite materials containing reinforcing materials, existing processes have problems such as uneven dispersion and poor interfacial bonding force, resulting in insufficient mechanical strength and dimensional stability of the materials and being unable to meet the long-term use requirements. Summary of the Invention

[0003] In view of the problems existing in the prior art: the negative pressure generating device has poor heat resistance and temperature control performance, complex preparation process, poor material strength, inconvenient use, inaccurate temperature control when acting on the human body and easy to cause scalding to the human body, etc., the present invention proposes a new negative pressure generating device and its application.

[0004] The technical solution of the present invention is as follows:

[0005] In a first aspect, the present invention provides a negative pressure generating device, the device includes a main body and a holding part connected to the main body, an opening is provided at the top end of the main body, a plurality of through holes are provided at the bottom end of the main body, and a connecting wall surface is provided between the opening and the through holes, so that a cavity is formed in the wall surface from the opening to the through holes;

[0006] The main body further includes:

[0007] a control module, the control module is arranged outside the wall surface;

[0008] A silo, the silo being a cylindrical structure without a top cover; a plurality of small holes are provided at the bottom of the cylinder;

[0009] A lifting module is provided on the silo, and the lifting module is connected to a driving mechanism to enable the silo to rise or fall in the cavity; the driving mechanism is connected to the control module;

[0010] Both ends of the holding part are open, one end is communicated with the bottom end of the body, and the other end is a negative pressure action port.

[0011] Preferably, the body is hemispherical, and an outwardly convex wall surface is connected from the open end of the holding part to the negative pressure action port, so that the holding part is hemispherical, and it is combined with the body to form a spherical shape;

[0012] And / or, the body is hemispherical, and a cylindrical wall surface is connected from the open end of the holding part to the negative pressure action port, and it is combined with the body to form a yurt shape;

[0013] And / or, the body is hemispherical, and an inwardly concave wall surface is connected from the open end of the holding part to the negative pressure action port, and it is combined with the body to form a mushroom shape.

[0014] Preferably, the control module is further connected to:

[0015] A temperature monitoring unit, the temperature monitoring unit is arranged at the edge of the bottom of the holding part for monitoring the temperature at the negative pressure action port; and / or,

[0016] A charging power source is arranged inside the body;

[0017] Further preferably, the control module is further connected to a communication module, and the communication module is used to connect to a user operation interface;

[0018] Further preferably, a display module is further provided on the body, the display module is arranged on the outer surface of the body, and the display module is connected to the temperature monitoring unit and the control module; more preferably, the display module is a touchable display screen for outputting information outward and receiving user instructions.

[0019] Preferably, a heat insulation layer is further provided in the cavity;

[0020] Further preferably, the materials of the body and the silo are titanium alloy;

[0021] Further preferably, the material of the holding part is 3D printing wire.

[0022] In a second aspect, the present invention provides a 3D printing wire for preparing the holding part of the negative pressure generating device described in the first aspect, and the 3D printing wire comprises by weight percentage:

[0023] 70%-80% of a high-temperature resistant polymer, where the high-temperature resistant polymer is polyetheretherketone (PEEK) resin;

[0024] 15%-25% of a reinforcing material, where the reinforcing material is one or more of carbon fiber, glass fiber, or ceramic powder;

[0025] 2%-5% of an auxiliary agent, where the auxiliary agent includes an antioxidant, a lubricant, and a dispersant.

[0026] Preferably, the reinforcing material is short-cut carbon fiber with a diameter of 5-10 μm;

[0027] The antioxidant is a hindered phenol compound;

[0028] The lubricant is zinc stearate;

[0029] The dispersant is polyethylene wax.

[0030] In a third aspect, the present invention provides a method for preparing a negative pressure generating device using the wire material described in the second aspect,

[0031] Step 1, raw material pretreatment: According to the formulation of the 3D printing wire material, the high-temperature resistant polymer, the reinforcing material, and the auxiliary agent are respectively dried and dewatered;

[0032] Step 2, mixing: The dried raw materials are put into a high-speed mixer according to the proportion and mixed at a speed of 500-800 rpm for 10-15 minutes to form a uniform mixture;

[0033] Step 3, extrusion granulation: The uniform mixture is added to a twin-screw extruder and melt-extruded under the conditions of 360-380 °C and a pressure of 15-20 MPa, and then obtained as primary wire material after water cooling and pelletizing;

[0034] Step 4, post-treatment: The primary wire material is annealed at 145-155 °C for 2-3 hours to obtain the final 3D printing wire material;

[0035] Step 5, 3D printing: The 3D printing wire material is used to obtain the body and the holding part of the negative pressure generating device through a 3D printing method based on material extrusion, and titanium alloy is used to obtain the material bin of the negative pressure generating device through a 3D printing method of direct metal laser melting, and finally a control module is assembled on the body.

[0036] Preferably, the tensile strength of the 3D printing wire material ≥ 100 MPa; the flexural modulus ≥ 4400 MPa; the thermal weight loss rate at 150 °C ≤ 5%; more preferably, the density of the 3D printing wire material is 1.28-1.32 g / cm 3 , and the surface roughness Ra ≤ 1.6 μm.

[0037] Preferably, the titanium alloy is Ti-6Al-4V titanium alloy, and its thermal conductivity is 7.955 W / m·K.

[0038] Preferably, the ratio of the length to the diameter of the twin-screw extruder is 30:1, and the screw rotation speed is 200 - 300 rpm.

[0039] Fourthly, the present invention provides an application of a negative pressure generating device in the preparation of products for mechanical stimulation and / or negative pressure action and / or warming action on the skin.

[0040] The beneficial effects of the present invention are as follows:

[0041] The negative pressure generating device of the present invention has a simple structure and is convenient to use. It can be designed into an integral structure or a split structure. The negative pressure action port at the bottom of the device can be accurately adapted to various parts of the body, used to generate negative pressure at the body part, simplifies the operation process, and reduces the technical dependence on professional operators. By controlling the displacement of the lifting module by the control module, the material bin is moved closer to or farther away from the negative pressure action port, realizing automatic temperature control within the range of 30 - 50 °C near the negative pressure action port, effectively avoiding scalding at the action port and improving the negative pressure stability. In addition, the device can be obtained by 3D printing technology, supporting low-cost rapid prototyping of complex structures, and significantly reducing the difficulty of industrial production. Description of the Drawings

[0042] Figure 1 is the front view structural schematic diagram of the negative pressure generating device (yurt type) in Embodiment 1 of the present invention.

[0043] Figure 2 is the bottom view structural schematic diagram of the negative pressure generating device (yurt type) in Embodiment 1 of the present invention.

[0044] Figure 3 is the three-dimensional structural schematic diagram of the body of the negative pressure generating device in Embodiment 1 of the present invention.

[0045] Figure 4 is the three-dimensional structural schematic diagram of the material bin and the lifting module of the negative pressure generating device in Embodiment 1 of the present invention.

[0046] Figure 5 is the sectional structural schematic diagram of the material bin and the lifting module of the negative pressure generating device in Embodiment 1 of the present invention.

[0047] Figure 6 is the transmission principle schematic diagram between the lifting module and multiple gears.

[0048] Figure 7 is the sectional structural schematic diagram of the material bin of the negative pressure generating device (spherical type) in Embodiment 1 of the present invention rising.

[0049] Figure 8It is a front view structural schematic diagram of the negative pressure generating device (mushroom type) in Embodiment 1 of the present invention.

[0050] Figure 9 It is a three-dimensional structural schematic diagram of the negative pressure generating device (mushroom type) in Embodiment 1 of the present invention.

[0051] Figure 10 It is a control system diagram of the negative pressure generating device in Embodiment 1 of the present invention.

[0052] Reference numerals: Figures 1-10 In the figure, 1. Body, 2. Holding part, 3. Control module, 4. Bin, 4-1. First gear, 4-2. Second gear, 4-3. Third gear, 4-4. Sub-gear, 5. Holding part, 6. Display module, 7. Lifting module, 8. Through hole, 9. Temperature monitoring unit. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the technical scope protected by the present application.

[0054] Embodiment 1

[0055] As Figures 1-9 shown, this embodiment provides a negative pressure generating device. The device includes a body 1 and a holding part 2 connected to the body 1. The top end of the body 1 is provided with an opening, and the bottom end of the body 1 is provided with a plurality of through holes 8. A connecting wall surface is provided between the opening and the through holes, so that a cavity is formed in the wall surface from the opening to the through holes; the body 1 is further provided with: a control module 3, the control module 3 is arranged outside the wall surface; a bin 4, the bin 4 is a cylindrical structure without a top cover, and combustion fuel is stored in the cylinder; a plurality of small holes are provided at the bottom of the cylinder for releasing the thermal radiation of the combustion fuel; a lifting module 7, the lifting module 7 is arranged on one side of the outer surface of the axial direction of the bin 4, and the lifting module 7 is connected to a driving mechanism to make the bin 4 rise or fall in the cavity of the body 1; the driving mechanism is connected to the control module; a display module 6, the display module 6 is arranged on the outer surface of the body 1, the display module 6 is connected to a temperature monitoring unit 9 and a control module 3, and the display module 6 is a touchable display screen for outputting information outward and receiving user instructions; a charging power source is further provided on the body 1 for converting kinetic energy of motion into electric energy during the operation of the device, so that it is compatible with wireless charging at the same time.

[0056] The control module 3 is further connected to: a temperature monitoring unit 9, the temperature monitoring unit 9 is arranged at the edge of the bottom of the holding part 2 for monitoring the temperature at the negative pressure acting port; a communication module (not shown in the figure), and the communication module is used to connect to a user operation interface.

[0057] The two ends of the holding part 2 are open. One end is connected to the bottom end of the body 1, and the other end is the negative pressure acting port for releasing heat radiation. The structure of this device can be set in various structural styles, and the following 3 types are specifically listed: The body 1 is hemispherical. One end of the holding part 2 that is open to the negative pressure acting port is connected with a convex wall surface, making the holding part 2 hemispherical, and it is combined with the body 1 into a spherical shape; and / or, the body 1 is hemispherical. One end of the holding part 2 that is open to the negative pressure acting port is connected with a cylindrical wall surface, and it is combined with the body 1 into a yurt shape; and / or, the body 1 is hemispherical. One end of the holding part 2 that is open to the negative pressure acting port is connected with a concave wall surface, and it is combined with the body into a mushroom shape. The present invention is not limited to these 3 structural styles.

[0058] Furthermore, the lifting module and the driving mechanism form a linkage conduction structure, and this linkage conduction structure includes but is not limited to a spiral structure, a gear and rack structure, a worm and gear structure, etc. The specific linkage conduction structure adopted in this embodiment is as Figures 4-6 shown, and the transmission principle is as Figure 6 shown: The lifting module 7 with a gear structure is installed on the silo 4. The micro driving motor is installed on the outer wall of the body. The micro driving motor is connected to the second gear 4-2. The second gear 4-2 is respectively meshed and connected with the first gear 4-1 and the third gear 4-3. A rotating shaft is provided in the middle of the first gear 4-1 and the third gear 4-3, and the other end of the rotating shaft is fixed on the body to stabilize the first gear 4-1 and the third gear 4-3. The first gear 4-1 and the third gear 4-3 are also respectively provided with a sub-gear 4-4. The lifting module is meshed and connected with the sub-gears 4-4 of the first gear 4-1 and the third gear 4-3. When the motor is started (it can rotate forward or backward), Figure 6 taking the counterclockwise rotation of the second gear 4-2 shown in

[0059] as an example, the first gear 4-1 and the second gear 4-2 will rotate clockwise simultaneously under the drive of the second gear 4-2. Thus, the sub-gears of the first gear 4-1 and the third gear 4-3 also rotate clockwise, thereby driving the lifting module 7 to move up and down.

[0059] Further combined with the attached Figure 10, This embodiment provides the system control process of the device. The system controls a micro drive motor (not shown in the figure) through a control module 3 to connect to a lifting module 7 to drive a bin 4 to rise and fall in the cavity of a main body 1. The top of the main body 1 is open, which can be used to add / change the combustion material therein; when the bin 4 descends in the main body 1 to approach the negative pressure action port, the temperature of the negative pressure action port can be increased / , conversely, when the bin 4 moves away from the negative pressure action port in the main body 1, the temperature of the negative pressure action port can be decreased; the temperature at the negative pressure action port is measured in real time by a temperature monitoring unit 9, and at the same time, it is fed back to a display module 6 and transmitted to a user operation interface through a communication module, namely Bluetooth (using a commercially available product); realizing precise control of the temperature at the negative pressure action port of the target area, combined with the operation of the OLED display screen of the display module and the user operation interface, improves the interactivity and practicality of the system; the communication module, WIFI / Bluetooth module, can expand functions such as remote control.

[0060] Further, the control module uses a microcontroller as the system core. The core algorithm module in the microcontroller is PID, which can compare the "set temperature" with the actual temperature fed back by the temperature monitoring unit 9, i.e., the temperature sensor, to adjust the actuator to ensure that the temperature is stable at the set value. This microcontroller is a commercially available product. The present invention is not limited to this type of microcontroller, and all microcontrollers that can implement intelligent functions such as automatic temperature control, bin lifting, and human-machine interaction can be used in the present invention.

[0061] The motor drive chip uses a commercially available product L298N, which is used to receive the signal output by the PID control and drive the motor to operate.

[0062] The display module 6 uses an OLED display screen, which can display information such as the system status and set temperature in real time, providing a visual interaction interface. The screen interface buttons of the display module 6 are used to input operation instructions such as the set temperature to achieve human-machine interaction.

[0063] The rechargeable built-in power supply chip provides power support for the entire system to ensure the normal operation of each component. This product uses a commercially available product, and the source is not limited.

[0064] The communication module, namely the WIFI / Bluetooth module, is used for wireless communication and can achieve remote control or data transmission (such as remotely setting the temperature, uploading temperature data, etc.).

[0065] The temperature monitoring unit 9, i.e., the temperature sensor, monitors the temperature at the negative pressure action port in real time and feeds the temperature data back to the controller to form a closed-loop control to ensure the temperature regulation accuracy (such as ±1°C).

[0066] The combustion material in the bin can be moxa sticks and / or other functional types of combustion materials, and it is not limited to this here.

[0067] Furthermore, the main body 1 and the holding part 2 adopt a split connection structure, which facilitates the quick replacement of their respective components. Among them, the main body and the holding part are made of 3D printing materials formed by PEEK material. The temperature resistance performance of PEEK is significantly better than that of traditional PLA and ABS. The material bin is made of titanium alloy Ti-6Al-4V. The thermal conductivity of titanium alloy is only 1 / 7 of that of iron, which can effectively isolate high temperature (resistant to 900 °C). An insulating layer can also be designed on the inner wall of the main body. By controlling the displacement of the lifting module by the control module, the material bin can be close to or far from the negative pressure action port in the cavity of the main body, realizing free temperature control in the range of 30-50 °C (according to the temperature detection unit and the accuracy of the sensor, the temperature adjustment accuracy can be within ±1 °C), effectively avoiding scalding at the action port and improving the negative pressure stability. The LED touch screen is hermetically connected to the device structure, which improves the visualization and portability of the device and is suitable for home and medical scenarios.

[0068] Preferably, the main body 1 is hemispherical. One end of the holding part is open to the negative pressure action port and is connected with a convex wall surface, so that the holding part 2 is hemispherical, and it is combined with the main body 1 into a spherical shape; and / or, the main body 1 is hemispherical. One end of the holding part is open to the negative pressure action port and is connected with a cylindrical wall surface, and it is combined with the main body 1 into a yurt shape; and / or, the main body 1 is hemispherical. One end of the holding part is open to the negative pressure action port and is connected with a concave wall surface, and it is combined with the main body 1 into a mushroom shape.

[0069] Further, the negative pressure generating device of the present invention is a health care device for mechanically stimulating and / or applying negative pressure and / or applying heat to the skin. Among them, the spherical negative pressure generating device is a household product; the yurt-shaped negative pressure generating device and the mushroom-shaped negative pressure generating device are suitable for products dedicated to medical technicians; these several negative pressure generating devices can all be designed with different diameters and different sizes. Different diameters are used to deal with affected areas of different areas of users. For example, for small affected areas, the spherical negative pressure generating device can be used at home by oneself. For medium-sized affected areas, the mushroom-shaped negative pressure generating device can be used at a medical institution. For large affected areas, the yurt-shaped negative pressure generating device can be used at a medical institution; the negative pressure action port at the bottom of the structure device can be accurately adapted to various parts of the body. Its combined structure is simple, simplifies the operation process, and reduces the technical dependence on professional operators.

[0070] Embodiment 2

[0071] This embodiment provides a 3D printing wire and a method for preparing the negative pressure generating device of Embodiment 1 by 3D printing using this wire and titanium alloy. During the experiment of developing the wire in the present invention, the raw materials used according to the weight percentage are:

[0072] 70%-80% of high-temperature resistant polymer polyether ether ketone (PEEK) resin, which can provide excellent high-temperature resistance and chemical stability;

[0073] Reinforcing materials: 15%-25%, including but not limited to one or more of carbon fiber, glass fiber, and ceramic powder, can significantly improve mechanical strength (tensile strength ≥ 100 MPa, flexural modulus ≥ 4400 MPa, a 20% increase compared to pure PEEK) and rigidity.

[0074] Additives: 2%-5%, including but not limited to:

[0075] Antioxidant: Antioxidant 1010 is used to inhibit high-temperature oxidative degradation;

[0076] Lubricant: Zinc stearate is used to improve processing fluidity;

[0077] Dispersant: Polyethylene wax is used to promote the uniform dispersion of reinforcing materials and enhance the interfacial bonding force.

[0078] The following is a specific example:

[0079] The composition of the 3D printing wire is as follows: 75% polyetheretherketone (PEEK) resin, 20% short carbon fiber with a diameter of 5-10 μm, 3% zinc stearate, and 2% polyethylene wax. The above components are dried at about 80 °C for 4 hours; the dried raw materials are put into a high-speed mixer and mixed at a speed of 600 rpm for 12 minutes to form a uniform mixture; the uniform mixture is added to a twin-screw extruder and melt-extruded at about 370 °C and a pressure of 18 MPa, and after water cooling and pelletizing, primary wire with a diameter of 1.7-1.8 mm and a density of 1.28-1.32 g / cm 3 is obtained; the primary wire is annealed at about 150 °C for 2 hours to obtain the final 3D printing wire; the 3D printing wire is used to obtain the body and the holding part of the negative pressure generating device through a 3D printing method based on material extrusion, and Ti-6Al-4V titanium alloy is used to obtain the material bin of the negative pressure generating device through a 3D printing method of direct metal laser melting. The negative pressure generating device shown in Figure 1 and Figure 2 is prepared.

[0080] In this embodiment, the long-term thermal weight loss rate of the 3D printing material used to make the negative pressure generating device in Example 1 at 150 °C is specifically 1.2%; the temperature resistance is -60 to 260 °C; the tensile strength reaches 103 MPa, and the flexural modulus reaches 4480 MPa; the mechanical strength is 20% higher than that of pure PEEK material; the density is 1.32 g / cm 3 , and the surface roughness Ra = 1.2 μm.

[0081] Using the same method, the negative pressure generating devices shown in Figure 7 as well as Figure 8 and 9 are respectively prepared.

[0082] Among them, water treatment is to avoid the generation of bubbles during the extrusion process and ensure the forming quality.

[0083] High-speed mixing is to ensure the uniform distribution of each component and avoid local agglomeration.

[0084] Extrusion granulation is to achieve efficient melting and mixing and enhance the dispersion of reinforcing materials.

[0085] The 3D printing wire obtained in this embodiment can take into account both light weight and high strength.

[0086] Post-treatment is to eliminate internal stress, improve dimensional stability, with surface roughness Ra≤1.6μm and dimensional accuracy error≤0.05mm, suitable for 3D printing of complex structures.

[0087] Furthermore, the material property advantages are as follows:

[0088] High temperature resistance: The thermal weight loss rate during long-term use at 150℃ is <5%, significantly better than traditional PLA (60℃) and ABS (100℃), meeting the structural stability under high temperature environments.

[0089] Mechanical properties: After carbon fiber reinforcement, the tensile strength ≥100MPa and the flexural modulus ≥4400MPa, a 20% increase compared to pure PEEK, suitable for high-strength load scenarios.

[0090] Processing adaptability: The wire surface is smooth and has high dimensional accuracy, compatible with the FDM 3D printing process, supporting low-cost and rapid prototyping of complex structures.

[0091] Among them, the twin-screw extrusion process solves the problems of uneven dispersion of reinforcing materials and poor interfacial bonding force in traditional processes, improving the overall performance of the composite material. 3D printing forming of the silo is carried out using Ti-6Al-4V titanium alloy. The thermal conductivity of Ti-6Al-4V is only 7.955W / m·K (about 1 / 7 of that of iron), effectively blocking high temperatures of 900℃, and can further cooperate with the design of the heat insulation layer to achieve the function of effective heat insulation and heat preservation.

[0092] In addition, 3D printing technology supports rapid prototyping and complex structure processing, reduces mold costs, and shortens the industrialization cycle. It takes into account high temperature resistance, high strength, and light weight, and is suitable for fields such as medical equipment and industrial high-temperature components. Through the optimization and update of the 3D printing material formula containing PEEK resin and its application in the preparation of the negative pressure generating device, combined with different structural designs of the negative pressure generating device, the collaborative development of high-temperature resistant and high-strength 3D printing wire and an efficient negative pressure device is achieved, with both performance advantages and engineering practicality.

[0093] Furthermore, the 3 kinds of negative pressure generating device specimens obtained by preparation: Specimen 1 ( Figure 1 and Figure 2 )、Specimen 2 (Figure 7 ) Specimen 3 Figure 8 and Figure 9 ) were subjected to R m , R p0.2 , A tests in accordance with GB / T 228.1-2010, and the test results are as shown in

[0094] Table 1:

[0095] sample <![CDATA[R m > <![CDATA[R p0.2 > A(％) specimen 1 1024 951 15.0 specimen 2 1028 952 13.5 specimen 3 1025 954 15.5

[0096] In summary, the present invention provides a negative pressure generating device that can perform mechanical stimulation and / or negative pressure action and / or thermal action on the skin, accurately adapt to various parts of the body, and achieve the purpose of effective physical therapy. The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A negative pressure generating device, characterized in that, The device comprises a body and a gripping portion connected to the body, the top of the body is provided with an opening, the bottom of the body is provided with a plurality of through holes, a wall is connected between the opening and the through holes, so that a cavity is formed in the wall from the opening to the through holes; The body also has: A control module, wherein the control module is arranged outside the wall surface; The silo is a cylindrical structure without a top cover; a plurality of small holes are provided at the bottom of the cylinder; The silo is provided with a lifting module, and the lifting module is connected to a driving mechanism to enable the silo to rise or fall in the cavity; the driving mechanism is connected to the control module; The gripping portion has openings at both ends, one end is connected to the bottom end of the body, and the other end is a negative pressure action port.

2. The negative pressure generating device according to claim 1, characterized in that: The main body is hemispherical, and the one end of the gripping portion is opened to the negative pressure acting port and is connected to a convex wall surface, so that the gripping portion is hemispherical, and the gripping portion is combined with the main body to form a spherical shape; and / or, The main body is hemispherical, and the one end of the gripping portion is opened to the negative pressure action port and is connected to a cylindrical wall surface, which is combined with the main body to form a yurt shape; and / or, The main body is hemispherical, and the one end of the gripping portion is opened to the negative pressure action port and is connected to an inner concave wall surface, which is combined with the main body to form a mushroom shape.

3. The negative pressure generating device according to claim 1, characterized in that: The control module is also connected to a temperature monitoring unit, which is disposed at the edge of the bottom of the grip portion and is used to monitor the temperature at the negative pressure application port; and / or, The main body is provided with a charging power supply; Preferably, the control module is also connected to a communication module, and the communication module is used to connect to a user operation interface; Preferably, a display module is also provided on the main body, and the display module is arranged on the outer surface of the main body, and the display module is connected to the temperature monitoring unit and the control module; more preferably, the display module is a touch screen for outputting information externally and accepting user instructions.

4. The negative pressure generating device according to claim 1, characterized in that, A heat insulation layer is also provided in the cavity; Preferably, the body and the silo are made of titanium alloy; Preferably, the gripping portion is made of 3D printing wire.

5. A 3D printing wire for preparing the holding part of the negative pressure generating device according to any one of claims 1 to 4, characterized in that, The 3D printing filament includes the following by weight percentage: 70%-80% of high temperature resistant polymer, wherein the high temperature resistant polymer is polyetheretherketone (PEEK) resin; 15%-25% of reinforcing material, wherein the reinforcing material is one or more of carbon fiber, glass fiber or ceramic powder; The additives are 2%-5%, and the additives include antioxidants, lubricants and dispersants.

6. The 3D printing wire according to claim 5, characterized in that: The reinforcing material is chopped carbon fiber with a diameter of 5-10 μm; The antioxidant is a hindered phenol compound; The lubricant is zinc stearate; The dispersant is polyethylene wax.

7. A method for preparing the negative pressure generating device according to any one of claims 1 to 4, characterized in that: Step 1, raw material pretreatment: according to the 3D printing wire material formulation of claim 5 or 6, the high temperature resistant polymer, the reinforcing material and the auxiliary agent are dried and dehydrated respectively; Step 2, Mixing: Put the dried raw materials into a high-speed mixer in proportion and mix at a speed of 500 - 800 rpm for 10 - 15 minutes to form a uniform mixture; Step 3, Extrusion Granulation: Add the uniform mixture to a twin-screw extruder and melt-extrude it under the conditions of 360 - 380 °C and a pressure of 15 - 20 MPa. After water cooling and pelletizing, primary wire rods are obtained; Step 4, Post-treatment: Anneal the primary wire rods at 145 - 155 °C for 2 - 3 hours to obtain the final 3D printing wire rods; Step 5, 3D Printing: Obtain the body and the holding part of the negative pressure generating device by means of 3D printing based on material extrusion with the 3D printing wire rods, obtain the material bin of the negative pressure generating device by means of 3D printing of direct metal laser melting with titanium alloy, and finally assemble a control module on the body.

8. The method according to claim 7, wherein, the tensile strength of the 3D printing wire rods ≥ 100 MPa; the flexural modulus ≥ 4400 MPa; the thermal weight loss rate at 150 °C ≤ 5%.

9. The method according to claim 7, wherein, the titanium alloy is Ti-6Al-4V titanium alloy.

10. Application of the negative pressure generating device according to any one of claims 1 - 4 in the preparation of products for mechanical stimulation and / or negative pressure action and / or warming action on the skin.

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