CN216169087U

CN216169087U - Closing device that can be used to reducible negative pressure of fat and body fluid suction and maintain

Info

Publication number: CN216169087U
Application number: CN202121904204.XU
Authority: CN
Inventors: 齐义营; 张宇翔
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-04-05
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a sealing device capable of maintaining reducible negative pressure for sucking fat and body fluid, which relates to the technical field of medical instruments and comprises a piston assembly, wherein the piston assembly comprises a first rod and a piston, the piston is fixedly connected to one end of the first rod, the first rod is provided with more than two grooves, through holes are formed between the grooves, and the piston is used for being matched with a needle cylinder; locating component, locating component include supporting seat and scalable stopper, and the supporting seat is used for dismantling with the cylinder and is connected, and scalable stopper and through-hole cooperation are connected, and scalable stopper is located inside the supporting seat, and scalable stopper and supporting seat contact. The utility model has the technical effect that the negative pressure control is stable.

Description

Closing device that can be used to reducible negative pressure of fat and body fluid suction and maintain

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a sealing device capable of maintaining reducible negative pressure for sucking fat and body fluid.

Background

Suction devices are negative pressure maintenance devices used in medical procedures involving suction, and are commonly used for liposuction, aspiration of fluid accumulation, etc., however, manual suction devices associated with liposuction procedures lack suitable components for maintaining the negative pressure and internal integrity of the sealed chamber, and increase of pressure in the chamber during centrifugation is inevitable. The existing suction device is complex in structure and inconvenient to use, so that doctors often adopt a mode of controlling negative pressure by hands when diagnosing, but the negative pressure is formed manually, and the negative pressure is difficult and unstable.

Chinese utility model patent, publication number: CN208287274U, announcement date: 2018.12.28, discloses a device for collecting, purifying and transplanting autologous fat, which is convenient for collecting, purifying and transplanting fat and has the disadvantage that the negative pressure is unstable due to manual control of the negative pressure.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Aiming at the technical problem of unstable negative pressure control of a suction device, the utility model provides a sealing device capable of maintaining the reducible negative pressure for sucking fat and body fluid, which can maintain a closed environment of a chamber to reduce the pollution to tissues, and meanwhile, the internal pressure is not increased during centrifugation, and the negative pressure is stable.

2. Technical scheme

In order to solve the problems, the technical scheme provided by the utility model is as follows:

a closure device for the maintenance of a reproducible negative pressure for the aspiration of fat and body fluids, comprising:

the piston assembly comprises a first rod and a piston, the piston is fixedly connected to one end of the first rod, the first rod is provided with more than two grooves, through holes are formed among the grooves, and the piston is used for being matched with a needle cylinder;

the positioning assembly comprises a supporting seat and a telescopic limiting stopper, the supporting seat is used for being detachably connected with the needle cylinder, the telescopic limiting stopper is matched and connected with the through hole, the telescopic limiting stopper is located inside the supporting seat, and the telescopic limiting stopper is in contact with the supporting seat.

Optionally, the supporting seat includes:

the first seat body is provided with a first groove I, a second groove I and a third groove I in sequence along the axial direction of the first rod, the two sides of the third groove I are provided with fourth groove I perpendicular to the third groove I, and the two sides of the first seat body are provided with clamping blocks;

and a second seat body, wherein a second first groove matched with the first groove, a second groove matched with the second groove and a second third groove matched with the third groove are sequentially arranged on the second seat body along the axial direction of the first rod, a second fourth groove perpendicular to the third groove is arranged on two sides of the second third groove, the second fourth groove is matched with the first fourth groove, and clamping seats matched with the clamping blocks are arranged on two sides of the second seat body.

Optionally, the telescopic limiter comprises a first connecting rod, a second connecting rod is arranged at one end of the first connecting rod, a third connecting rod is arranged at the other end of the first connecting rod, and a spring is sleeved on the periphery of the first connecting rod;

the side, far away from the first connecting rod, of the second connecting rod is rotatably connected with a limiting rod, or the side, far away from the first connecting rod, of the second connecting rod is fixedly connected with a limiting rod, and the limiting rod is made of an elastic material;

the limiting rod is matched with the first third groove, and the third connecting rod is matched with the second third groove, or the limiting rod is matched with the second third groove, and the third connecting rod is matched with the first third groove;

wherein, the gag lever post is located in the through-hole.

Optionally, the piston assembly further includes a second rod, the second rod is fixedly connected to the first rod and the piston, the first groove is axially symmetric with respect to the second rod, the through hole is axially symmetric with respect to the second rod, one side of the second rod is matched with the first fourth groove, and the other side of the second rod is matched with the second fourth groove.

Optionally, the piston assembly further includes a piston handle, the piston handle is fixedly connected to the other end of the first rod, the piston handle is fixedly connected to the second rod, one side of the piston handle is matched with the first groove, and the other side of the piston handle is matched with the second groove.

Optionally, the through hole is waist-shaped.

Optionally, the piston assembly is made of polypropylene or polyvinyl chloride.

Optionally, the outer periphery of the piston is sleeved with a sealing ring.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

1. through the matching of the piston assembly and the needle cylinder and the fixing of the relative positions of the piston assembly and the needle cylinder by the positioning assembly, the negative pressure can be maintained in a closed environment, the use method is simple, and the negative pressure is stable;

2. the piston assembly is made of disposable prefabricated materials, and the supporting seat and the telescopic limiting stopper are detachable metal sleeves, so that the piston assembly is convenient to clean and sterilize and can be repeatedly used;

3. the groove of the first rod can be independently broken, and the redundant part can be directly broken for centrifugal purification of fat without disassembling the first seat body and the second seat body;

4. when the fat is purified, on one hand, the container is ensured to be closed, and the external pollution is isolated; on the other hand, the pressure in the container (the internal pressure increased by the movement trend of the needle core towards the needle head direction under the influence of centrifugal force) generated in the traditional mode (the original matched piston of the injector is broken) during centrifugation is avoided, the increase of the pressure can lead to the reduction of the activity of stem cells in adipose tissues, and the telescopic limiter of the utility model patent avoids the increase of the pressure in the container caused by the centrifugal force, and the suction device can be manufactured according to different specifications and is adaptive to needle cylinders with different specifications; besides being used for liposuction, the suction cup can also be used for puncture negative pressure suction diagnosis and fluid suction treatment.

Drawings

Fig. 1 is a schematic structural diagram of a suction device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first seat body according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second seat body according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a retractable stopper according to an embodiment of the present invention;

in the figure: 1. a needle cylinder; 11. a first opening; 12. a second opening; 13. an injection head; 14. a support plate; 2. a piston assembly; 21. a first lever; 211. a groove; 212. a through hole; 22. a piston; 23. a second lever; 24. a piston handle; 3. a positioning assembly; 31. a supporting seat; 311. a first seat body; 3111. the first groove is formed; 3112. the first second groove; 3113. the first third groove; 3114. the fourth groove I; 3115. a clamping block; 312. a second seat body; 3121. a second first groove; 3122. a second groove II; 3123. a second third groove; 3124. a second fourth groove; 3125. a card holder; 32. a retractable stopper; 321. a first connecting rod; 322. a spring; 323. a second connecting rod; 324. a limiting rod; 325. and a third connecting rod.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.

Example 1

With reference to fig. 1-4, the present invention provides a closure device for the maintenance of a recoverable negative pressure for the aspiration of fat and body fluids, comprising:

the piston assembly 2, the piston assembly 2 includes the first pole 21 and piston 22, the piston 22 is fixedly connected to one end of the first pole 21, the first pole 21 has more than two recesses 211, there are through holes 212 between the recesses 211, the piston 22 is used for cooperating with syringe 1;

locating component 3, locating component 3 include supporting seat 31 and scalable stopper 32, and supporting seat 31 is used for dismantling with the cylinder 1 and is connected, and scalable stopper 32 and through-hole 212 cooperation are connected, and scalable stopper 32 is located inside supporting seat 31, and scalable stopper 32 and supporting seat 31 contact.

The syringe 1 is hollow, one end of the syringe 1 is provided with a first opening 11, the other end of the syringe 1 is provided with a second opening 12, and an injection head 13 is arranged at the first opening 11.

Specifically, before the suction, first, the plunger 22 of the plunger assembly 2 is engaged with the second opening 12 of the cylinder 1 and the plunger first rod 21 is pushed so that the plunger 22 moves in a direction close to the first opening 11 and evacuates the air inside the cylinder 1, and then the support base 31 and the cylinder 1 are assembled together, at which time the retractable stopper 32 is in contact with the first rod 21, thereby completing the assembly.

When suction is performed, the needle is matched with the injection head 13, the needle is directed at a sucked object, the first rod 21 is pulled towards a direction away from the first opening 11, the first rod 21 drives the piston 22 to move towards a direction away from the first opening 11, at this time, negative pressure is formed inside the syringe 1, under the action of the negative pressure, a target object, such as fat, blood and the like, is sucked into the syringe 1, after the first rod 21 is pulled for a certain distance, the telescopic stopper 32 extends towards the radial center of the syringe 1 and is matched with the first through hole 212 of the first rod 21, if the target object does not meet the requirement at this time, the first rod 21 is continuously pulled towards a direction away from the first opening 11, the first rod 21 drives the piston 22 to move towards a direction away from the first opening 11, the telescopic stopper 32 shortens towards the radial outer side of the syringe 1, the telescopic stopper 32 is contacted with the first rod 21, after the first rod 21 is pulled for a certain distance, the retractable stopper 32 extends toward the radial center of the needle cylinder 1 and is engaged with the second through hole 212 of the first rod 21, if the object is not needed, the first rod 21 is pulled continuously until the object in the needle cylinder 1 is needed, and the part of the first rod 21 away from the piston 22 is broken along the groove 211 of the first rod 21, that is, the first rod 21 in the piston assembly 2 is disposable, and under the limit of the retractable stopper 32, even when fat purification is performed and centrifugation is performed, the pressure inside the needle cylinder 1 does not rise, so that the pressure inside the needle cylinder 1 is maintained stable, and compared with the negative pressure controlled by hands, the retractable stopper 32 makes the controlled negative pressure more stable and labor-saving.

The telescopic limiting stopper 32 is stretched or shortened due to pulling, and is used for removing the limitation when the piston assembly 2 is disassembled or the piston assembly 2 moves close to the first opening 11; when the piston assembly 2 is pulled to be away from the second opening 12, the telescopic limiting stopper 32 is designed to be a soft material or a resettable rotating shaft at the joint, the telescopic limiting stopper 32 can be pulled outwards in a single direction without being shortened until the next through hole 212 position is reached, the telescopic limiting stopper 32 resets, and when the piston assembly 2 is released, the piston assembly 2 moves towards the direction close to the second opening 12 due to the negative pressure effect until the upper pole (far end) of the through hole 212 is matched with and clamped with the telescopic limiting stopper 32.

The number of the grooves 211 is more than two, the through holes 212 are arranged between the grooves 211, the number of the through holes 212 is one less than that of the grooves 211, the more the number of the grooves 211 is, the more the number of the through holes 212 is, the more the target amount is selected, and the better the accuracy is. Wherein, the supporting seat 31 is detachably connected with the needle cylinder 1, so that the supporting seat 31 is convenient to mount and dismount, and the flexibility of the suction device is increased.

Specifically, the support seat 31 includes:

the first seat body 311, wherein a first groove 3111, a second groove 3112 and a third groove 3113 are sequentially arranged on the first seat body 311 along the axial direction of the first rod 21, a fourth groove 3114 perpendicular to the third groove 3113 is arranged on two sides of the third groove 3113, and clamping blocks 3115 are arranged on two sides of the first seat body 311;

the second seat body 312 is sequentially provided with a second first groove 3121 matched with the first groove 3111, a second groove 3122 matched with the first second groove 3112 and a second third groove 3123 matched with the first third groove 3113 along the axial direction of the first rod 21, two sides of the second third groove 3123 are provided with a second fourth groove 3124 perpendicular to the second third groove 3123, the second fourth groove 3124 is matched with the first fourth groove 3114, and two sides of the second seat body 312 are provided with clamping seats 3125 matched with the clamping blocks 3115.

During assembly, the retractable stopper 32 is first placed in the first third groove 3113 and the second third groove 3123, then the needle cylinder 1 is fitted with the first second groove 3112 and the second groove 3122, the piston assembly 2 is fitted with the first groove 3111 and the second first groove 3121, the first fourth groove 3114 and the second fourth groove 3124, and finally the first holder body 311 and the second holder body 312 are fitted and connected through the fixture 3115 and the fixture 3125. Wherein, through pressing fixture block 3115 for fixture block 3115 and cassette 3125 cooperation, thereby install or dismantle easy operation, connect reliably. In order to facilitate cleaning and sterilization, and to facilitate repeated use, the first seat body 311 and the second seat body 312 are made of metal.

Specifically, the retractable stopper 32 includes a first connecting rod 321, one end of the first connecting rod 321 is provided with a second connecting rod 323, the other end of the first connecting rod 321 is provided with a third connecting rod 325, and the periphery of the first connecting rod 321 is sleeved with a spring 322;

wherein, one side of the second connecting rod 323 away from the first connecting rod 321 is rotatably connected with a limiting rod 324, or one side of the second connecting rod 323 away from the first connecting rod 321 is fixedly connected with the limiting rod 324, and the material of the limiting rod 324 is elastic;

the limiting rod 324 is matched with the first third groove 3113, the third connecting rod 325 is matched with the second third groove 3123, or the limiting rod 324 is matched with the second third groove 3123, and the third connecting rod 325 is matched with the first third groove 3113;

wherein, the limiting rod 324 is positioned in the through hole 212.

Specifically, the first rod 21 is pulled in a direction away from the first opening 11, at the beginning, the limiting rod 324 is in contact with the first rod 21, at this time, the spring 322 is in a compressed state, after the first rod 21 is pulled for a certain distance, the spring 322 drives the second connecting rod 323 to move towards the radial center of the needle cylinder 1, the second connecting rod 323 drives the limiting rod 324 to move towards the radial center of the needle cylinder 1, so that the limiting rod 324 is matched with the through hole 212, at this time, the spring 322 is in a normal state, the first rod 21 is continuously pulled, due to the elasticity of the limiting rod 324, the limiting rod 324 bends in a direction away from the first opening 11, so that the limiting rod 324 comes out of the through hole 212, the limiting rod 324 is in contact with the first rod 21, and at this time, the spring 322 is in a compressed state again. The spring 322 can slide on the first connecting rod 321, and the second connecting rod 323 and the third connecting rod 325 both limit the spring 322. During fat purification, the limiting rod 324 limits the first rod 21 to move towards the direction close to the first opening 11, so as to avoid pressure rise in the syringe 1 caused by centrifugal force.

Specifically, the piston assembly 2 further includes a second rod 23, the second rod 23 is fixedly connected with the first rod 21 and the piston 22, the first groove 211 is axially symmetric with respect to the second rod 23, the through hole 212 is axially symmetric with respect to the second rod 23, one side of the second rod 23 is engaged with the first fourth groove 3114, and the other side of the second rod 23 is engaged with the second fourth groove 3124.

The groove 211 is axially symmetrical with respect to the second rod 23, so that the piston assembly 2 can be conveniently broken along the groove 211, and the broken opening is ensured to be flat; the through hole 212 is axially symmetrical relative to the second rod 23, and when the through hole 212 is matched with the limiting rod 324, the symmetry of two sides is ensured, and the matching stability is improved; the second rod 23 is matched with the first groove 3114 and the second groove 3124, so that the piston assembly 2 is prevented from rotating, and the stability of matching is improved.

Specifically, the piston assembly 2 further includes a piston handle 24, the piston handle 24 is fixedly connected to the other end of the first rod 21, the piston handle 24 is fixedly connected to the second rod 23, one side of the piston handle 24 is engaged with the first groove 3111, and the other side of the piston handle 24 is engaged with the second groove 3121.

Wherein, when pulling the piston assembly 2, holding the piston handle 24 increases the friction between the hand and the piston assembly 2, preventing slipping. During assembly, the piston handle 24 is matched with the first groove 3111 and the second groove 3121, so that the integrity of the suction device is improved, and the volume of the suction device is reduced.

Specifically, the second opening 12 is provided with a supporting plate 14, one side of the supporting plate 14 is matched with the first second groove 3112, and the other side of the supporting plate 14 is matched with the second groove 3122.

Wherein, the supporting plate 14 cooperates with the first notch 3112 and the second notch 3122 to improve the integrity of the suction device and reduce the volume of the suction device.

Specifically, the syringe 1 is made of a transparent material to facilitate the visibility of the suction state inside the syringe 1.

Specifically, the injection head 13 of the syringe 1 is a screw injection head, which not only improves the reliability of connection between the injection head 13 of the syringe 1 and the needle, but also facilitates the disassembly and assembly of the injection head 13 and the needle of the syringe 1, or the injection head 13 of the syringe 1 is a straight injection head, which is convenient to install and high in efficiency.

Specifically, the through holes 212 are waist-shaped, which is beneficial to the matching between the through holes 212 and the limiting rods 324, and is convenient for the limiting rods 324 to move from one through hole 212 to the other through hole 212, thereby increasing the moving fluency of the first rod 21.

Specifically, the piston assembly 2 is made of polypropylene or polyvinyl chloride. Wherein, the polypropylene has good heat resistance and no toxicity; polyvinyl chloride has better tensile strength and compressive strength and good corrosion resistance.

Specifically, the outer periphery of the piston 22 is sleeved with a sealing ring to increase the sealing performance and maintain the negative pressure state inside the syringe 1.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims

1. A closure device for the maintenance of a reducible negative pressure useful for the aspiration of fat and body fluids, comprising:

2. A closure device for the maintenance of a reducible negative pressure for the suction of fats and body fluids according to claim 1, wherein said support base comprises:

3. The closure device of claim 2, wherein the retractable stopper comprises a first connecting rod, a second connecting rod is disposed at one end of the first connecting rod, a third connecting rod is disposed at the other end of the first connecting rod, and a spring is sleeved on the outer periphery of the first connecting rod;

wherein, the gag lever post is located in the through-hole.

4. A closure device with reducible negative pressure maintenance usable for suction of fats and body fluids, as set forth in claim 2, wherein the piston assembly further comprises a second rod, the second rod and the first rod and the piston are fixedly connected, the first groove is axially symmetric with respect to the second rod, the through hole is axially symmetric with respect to the second rod, one side of the second rod is engaged with the first groove, and the other side of the second rod is engaged with the second groove.

5. A closure device with reducible negative pressure maintenance for suctioning of fat and body fluids as set forth in claim 2, wherein the piston assembly further comprises a piston handle fixedly connected to the other end of the first rod, the piston handle fixedly connected to the second rod, one side of the piston handle engaging the first groove, the other side of the piston handle engaging the second groove.

6. A closure device for the maintenance of a reducible negative pressure that can be used in the aspiration of fats and body fluids according to claim 2, wherein said through hole is waist-shaped.

7. A closure device for the maintenance of a reducible negative pressure that is used in the aspiration of fats and fluids according to claim 1, wherein the piston assembly is made of polypropylene or polyvinyl chloride.

8. A closure device with reducible negative pressure maintenance for suction of fats and body fluids according to claim 1, wherein the piston is peripherally sleeved with a sealing ring.