Syringe with pumpback fixing structure

Abstract

The utility model provides an injector with a pumpback fixing structure, which relates to the field of medical cosmetology and comprises an injection cylinder, a fixing sleeve is arranged on the inner wall of one side of the injection cylinder, a through hole is formed in the top of the fixing sleeve, clamping plates are arranged on the inner walls of the upper side and the lower side of the through hole, an injection head is mounted on the other side of the injection cylinder, and the injection head is connected with the injection cylinder. The outer wall of the injection head is sleeved with a pintle, a needle head is installed on one side of the pintle, a piston body is arranged on the inner wall of the injection cylinder, a piston shaft rod is installed on one side of the piston body, and one end of the piston shaft rod penetrates through the through hole; the injector is provided with the injection head, the pintle, the needle head, the piston handle, the piston shaft rod, the fixing sleeve, the through hole and the dial gauge, pumpback and injection molding are facilitated, the situation that filler is injected into a blood vessel is avoided, the piston body is limited and fixed by arranging the groove, the spring, the limiting plate and the clamping plate, and the injector has the pumpback fixing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of medical aesthetics, in particular to a syringe with a back-drawing and fixing structure. Background Technique

[0002] A syringe is a medical device used in injection medical aesthetics. It is a method of a large class of plastic surgery that injects biological materials or synthetic biocompatible materials into the dermis or subcutaneous tissue by injection, and achieves the reduction of skin wrinkles or shaping through different action mechanisms.

[0003] For example, in the patent application No. 202210908464.7, the utility model discloses a "facial syringe for beauty treatment", which includes a liquid storage syringe barrel, a movable sleeve and an annular abutting plate. The surface of the liquid storage syringe barrel is provided with a movable sleeve through a thread, and the top end of the movable sleeve is fixedly connected with an annular abutting plate, and the annular abutting plate is sleeved on the surface of the liquid storage syringe barrel. A rubber piston is inserted into the liquid storage syringe barrel, and a liquid pushing rod is fixedly connected to the bottom end of the rubber piston. A first shaft rod is vertically inserted into the liquid pushing rod through a bearing, and a limiting rod is sleeved on the surface of the first shaft rod through a thread. A limiting cavity is formed in the liquid pushing rod. The bottom end of the first shaft rod passes through the limiting cavity and is inserted into the inner bottom surface of the liquid pushing rod through a bearing. This facial syringe can, through its structure, enable the syringe to adjust and limit the amount of filler that can be drawn only according to the required dosage during use for the user. However, during the injection process of the existing facial syringe, a back-drawing operation needs to be performed first to avoid embolism, but many doctors still do not perform this operation for convenience or carelessness. Therefore, the existing facial syringe does not have a back-drawing and fixing effect, and there is a risk of injecting the filler into the blood vessel during use, causing blood vessel embolism. Therefore, the utility model proposes a syringe with a back-drawing and fixing structure to solve the problems existing in the prior art. Content of the Utility Model

[0004] In view of the above problems, the utility model proposes a syringe with a back-drawing and fixing structure. By setting an injection head, a plunger, a needle, a piston handle, a piston shaft rod, a fixing sleeve, a through hole and a scale table, the syringe is convenient for back-drawing and injection molding, avoiding the situation of injecting the filler into the blood vessel. By setting a groove, a spring, a limiting plate and a clamping plate, the piston body is limited and fixed, so that the syringe has a back-drawing and fixing effect.

[0005] To achieve the object of the present utility model, the present utility model is realized through the following technical solutions: A syringe with a retraction and fixation structure, including a syringe barrel, wherein a fixing sleeve is provided on the inner wall of one side of the syringe barrel, a through hole is opened at the top of the fixing sleeve, clamping plates are provided on the inner walls on both the upper and lower sides of the through hole, an injection head is installed on the other side of the syringe barrel, a plunger is sleeved on the outer wall of the injection head, a needle is installed on one side of the plunger, a piston body is provided on the inner wall of the syringe barrel, a piston shaft is installed on one side of the piston body and one end thereof penetrates through the through hole, a piston handle is installed on the other side of the piston shaft, sliding grooves are opened on both the upper and lower sides of the piston shaft, four grooves are opened on the inner wall on one side of the piston shaft, and a first fixing seat is installed on the inner wall of the groove.

[0006] A spring is provided on the outer wall of the first fixing seat, a second fixing seat is installed at the top of the spring, a limiting plate is installed at the top of the second fixing seat and one end thereof penetrates through the groove, and a scale is provided on the front surface of the syringe barrel.

[0007] Further improvement lies in that: The syringe barrel and the fixing sleeve are closely fitted, and the fixing sleeve and the through hole are integrally provided.

[0008] Further improvement lies in that: The number of the clamping plates is two, and the clamping plates are arranged as right-angled triangles.

[0009] Further improvement lies in that: The piston shaft is movably connected to the through hole and the syringe barrel, and the piston shaft and the piston body are closely fitted.

[0010] Further improvement lies in that: The sliding grooves and the grooves are integrally provided with the piston shaft, and the clamping plates are slidably connected to the sliding grooves.

[0011] Further improvement lies in that: Both ends of the spring are fixedly connected to the first fixing seat and the second fixing seat, and the spring is movably connected to the groove.

[0012] Further improvement lies in that: The inclined surface of the limiting plate is fitted with the inclined surface of the clamping plate, and the limiting plate is arranged as a right-angled trapezoid.

[0013] The beneficial effects of the present utility model are as follows: By providing an injection head, a plunger, a needle, a piston handle, a piston shaft, a fixing sleeve, a through hole and a scale, the present utility model facilitates retraction and injection molding, and avoids the situation of injecting the filler into the blood vessel. By providing grooves, springs, limiting plates and clamping plates, the piston body is limited and fixed, so that the syringe has a retraction and fixation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view sectional structure schematic diagram of the present utility model;

[0015] Figure 2 This is a schematic side view structure of the utility model;

[0016] Figure 3 This is a schematic front view structure of the utility model;

[0017] Figure 4 This is a schematic three - dimensional structure of the syringe of the utility model;

[0018] Figure 5 This is the utility model Figure 1 enlarged view of part A.

[0019] In the figure: 1, syringe barrel; 2, fixing sleeve; 3, through - hole; 4, clamping plate; 5, injection head; 6, plunger; 7, needle; 8, piston shaft rod; 9, piston handle; 10, piston body; 11, sliding groove; 12, groove; 13, first fixing seat; 14, spring; 15, second fixing seat; 16, limiting plate; 17, scale. Specific embodiments

[0020] In order to deepen the understanding of the present utility model, the following will further elaborate on the present utility model in combination with embodiments. These embodiments are only used to explain the present utility model and do not constitute a limitation to the protection scope of the present utility model.

[0021] According to Figures 1 - 5 As shown, this embodiment proposes a syringe with a back - drawing and fixing structure, including a syringe barrel 1. A fixing sleeve 2 is arranged on the inner wall of one side of the syringe barrel 1. A through - hole 3 is opened at the top of the fixing sleeve 2. Clamping plates 4 are arranged on the inner walls on the upper and lower sides of the through - hole 3. An injection head 5 is installed on the other side of the syringe barrel 1. A plunger 6 is sleeved on the outer wall of the injection head 5. A needle 7 is installed on one side of the plunger 6. A piston body 10 is arranged on the inner wall of the syringe barrel 1. A piston shaft rod 8 is installed on one side of the piston body 10 and penetrates through the through - hole 3 at one end. A piston handle 9 is installed on the other side of the piston shaft rod 8. Sliding grooves 11 are opened on the upper and lower sides of the piston shaft rod 8. Four grooves 12 are opened on the inner wall of one side of the piston shaft rod 8. A first fixing seat 13 is installed on the inner wall of the groove 12.

[0022] A spring 14 is provided on the outer wall of the first fixing seat 13. The top of the spring 14 is equipped with a second fixing seat 15. A limiting plate 16 is installed on the top of the second fixing seat 15 and one end penetrates through the groove 12. A scale 17 is provided on the front of the syringe barrel 1. When the device is in use, first, the piston body 10 is located at the injection head 5 inside the syringe barrel 1. The needle 7 connected to the plunger 6 on the injection head 5 is inserted into the medicine bottle to be injected. Manually pull the piston rod 8 connected to the piston handle 9 outward through the through hole 3 in the fixing sleeve 2. When the piston rod 8 passes through the through hole 3, the two clamping plates 4 in the through hole 3 slide in the corresponding sliding grooves 11, increasing the stability of the movement of the piston rod 8. Thus, the piston rod 8 drives the piston body 10 to move outward in the syringe barrel 1, increasing the volume inside the syringe barrel 1 to generate negative pressure. Therefore, the filler in the medicine bottle enters the syringe barrel 1 through the needle 7 and the injection head 5. Then, a certain amount of filler is extracted according to the scale 17, leaving a space in the syringe barrel 1. Thus, the limiting plate 16 connected by the spring 14 in the outermost groove 12 of the piston rod 8 does not fit with the clamping plate 4. Then, when injecting through the needle 7, the staff first pulls the piston rod 8 upward, causing the piston rod 8 to drive the piston body 10 to move outward, thereby performing a back-draw to avoid injecting the filler into the blood vessel. At the same time, the limiting plate 16 connected by the spring 14 in the groove 12 of the piston rod 8 extends out, causing the limiting plate 16 connected by the outermost spring 14 to fit on the clamping plate 4 during the movement of the piston rod 8, thereby limiting and fixing the piston body 10. When no blood is drawn during the back-draw, manually push the piston rod 8 connected to the piston handle 9 inward to inject the filler.

[0023] The syringe barrel 1 and the fixing sleeve 2 are closely fitted. The fixing sleeve 2 and the through hole 3 are integrally provided. By manually pulling the piston rod 8 connected to the piston handle 9 outward through the through hole 3 in the fixing sleeve 2, the piston rod 8 passes through the through hole 3.

[0024] There are two plastic clamping plates 4. The clamping plates 4 are set as right-angled triangles. When the piston rod 8 passes through the through hole 3, the two clamping plates 4 in the through hole 3 slide in the corresponding sliding grooves 11, increasing the stability of the movement of the piston rod 8.

[0025] The piston rod 8 is movably connected to the through hole 3 and the syringe barrel 1. The piston rod 8 and the piston body 10 are closely fitted. By driving the piston body 10 to move outward in the syringe barrel 1 through the piston rod 8, the volume inside the syringe barrel 1 increases to generate negative pressure. Therefore, the filler in the medicine bottle enters the syringe barrel 1 through the needle 7 and the injection head 5.

[0026] The sliding groove 11 and the groove 12 are integrally provided with the piston rod 8. The clamping plate 4 is slidably connected to the sliding groove 11. By the two clamping plates 4 in the through hole 3 sliding in the corresponding sliding grooves 11, the stability of the movement of the piston rod 8 is increased.

[0027] Both ends of the spring 14 are fixedly connected to the first fixed seat 13 and the second fixed seat 15, and the spring 14 is movably connected to the groove 12. The limiting plate 16 connected by the spring 14 in the groove 12 of the piston shaft rod 8 extends out, so that the limiting plate 16 connected to the outermost spring 14 is driven to fit on the clamping plate 4 during the movement of the piston shaft rod 8.

[0028] The inclined surface of the limiting plate 16 is arranged to fit with the inclined surface of the clamping plate 4. The limiting plate 16 is arranged as a right trapezoid. During the movement of the piston shaft rod 8, the limiting plate 16 connected to the outermost spring 14 is driven to fit on the clamping plate 4, so as to limit and fix the piston body 10.

[0029] At the same time, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0030] When the syringe with a retraction and fixation structure is in use, first, the piston body 10 is located at the injection head 5 inside the syringe barrel 1. The needle 7 connected to the plunger 6 on the injection head 5 is inserted into the medicine bottle to be injected. Manually pull the piston shaft rod 8 connected to the piston handle 9 outward through the through hole 3 in the fixed sleeve 2. When the piston shaft rod 8 passes through the through hole 3, the two clamping plates 4 in the through hole 3 slide in the corresponding sliding grooves 11, increasing the stability of the movement of the piston shaft rod 8. Thus, the piston shaft rod 8 drives the piston body 10 to move outward in the syringe barrel 1, increasing the volume inside the syringe barrel 1 to generate negative pressure. Thus, the filler in the medicine bottle enters the syringe barrel 1 through the needle 7 and the injection head 5. Then, a certain amount of filler is extracted according to the scale 17, leaving a space in the syringe barrel 1. Thus, the limiting plate 16 connected by the spring 14 in the outermost groove 12 of the piston shaft rod 8 does not fit with the clamping plate 4. Then, when injecting through the needle 7, the staff first pulls the piston shaft rod 8 upward, driving the piston body 10 to move outward, so as to perform retraction, avoiding the situation of injecting the filler into the blood vessel. At the same time, the limiting plate 16 connected by the spring 14 in the groove 12 of the piston shaft rod 8 extends out, so that the limiting plate 16 connected to the outermost spring 14 is driven to fit on the clamping plate 4 during the movement of the piston shaft rod 8, so as to limit and fix the piston body 10. When no blood is drawn during retraction, manually push the piston shaft rod 8 connected to the piston handle 9 inward to inject the filler.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A syringe with a retraction fixing structure, characterized in that: The syringe comprises a syringe (1), wherein a fixing sleeve (2) is provided on the inner wall of one side of the syringe (1), a through hole (3) is provided on the top of the fixing sleeve (2), and clamping plates (4) are provided on the inner walls of the upper and lower sides of the through hole (3), an injection head (5) is installed on the other side of the syringe (1), a needle bolt (6) is provided on the outer wall of the injection head (5), and a needle (7) is installed on one side of the needle bolt (6), a piston body (10) is provided on the inner wall of the syringe (1), a piston shaft (8) is installed on one side of the piston body (10) and one end thereof passes through the through hole (3), a piston handle (9) is installed on the other side of the piston shaft (8), sliding grooves (11) are provided on the upper and lower sides of the piston shaft (8), four grooves (12) are provided on the inner wall of one side of the piston shaft (8), and a first fixing seat (13) is installed on the inner wall of the groove (12); A spring (14) is provided on the outer wall of the first fixing seat (13), a second fixing seat (15) is installed on the top of the spring (14), a limiting plate (16) is installed on the top of the second fixing seat (15) and one end thereof passes through the groove (12), and a scale (17) is provided on the front of the injection cylinder (1).

2. The syringe with a withdrawal fixing structure according to claim 1, characterized in that: The injection cylinder (1) and the fixing sleeve (2) are tightly fitted, and the fixing sleeve (2) and the through hole (3) are integrally arranged.

3. The syringe with a withdrawal fixing structure according to claim 1, characterized in that: The card plate (4) is made of two pieces of plastic and the card plate (4) is arranged in a right triangle.

4. The syringe with a retraction fixing structure according to claim 1, characterized in that: The piston shaft (8) is movably connected to the through hole (3) and the injection cylinder (1), and the piston shaft (8) is tightly fitted to the piston body (10).

5. The syringe with a withdrawal fixing structure according to claim 1, characterized in that: The slide groove (11) and the groove (12) are integrally arranged with the piston shaft (8), and the clamping plate (4) and the slide groove (11) are slidably connected.

6. The syringe with a withdrawal fixing structure according to claim 1, characterized in that: The two ends of the spring (14) are fixedly connected to the first fixing seat (13) and the second fixing seat (15), and the spring (14) is movably connected to the groove (12).

7. The syringe with a withdrawal fixing structure according to claim 1, characterized in that: The inclined surface of the limiting plate (16) and the inclined surface of the clamping plate (4) are arranged to fit each other, and the limiting plate (16) is arranged to be a right-angled trapezoid.

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