Synchronous negative pressure injector barrel and injector thereof

Abstract

The synchronous negative pressure syringe comprises a syringe body, a first negative pressure cylinder, a second negative pressure cylinder, a first piston assembly and a second piston assembly, and the lower portion of the first negative pressure cylinder is communicated with the lower portion of the second negative pressure cylinder; the bottom of the injection cylinder is detachably connected with a negative pressure needle head, the negative pressure needle head comprises a negative pressure suction cup and an injection needle, and the negative pressure suction cup is communicated with the second negative pressure cylinder through an air suction pipe; the first piston assembly and the second piston assembly are matched to synchronously suck air to the negative pressure suction cup for adsorption when a needle head of the injection needle assembly is used for injection. By means of the first piston assembly, the second piston assembly, the injection cylinder, the first negative pressure cylinder and the second negative pressure cylinder, when injection is conducted through a needle head of the injection needle assembly, air suction and adsorption can be conducted on the negative pressure suction cup synchronously, and the situation of liquid leakage of the needle head can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of syringes, and in particular to a synchronous negative pressure syringe barrel and a syringe thereof. Background Art

[0002] During the process of performing beauty-related injection operations, such as PRP injection or hydrodermabrasion injection, single-needle injection will cause strong pain. Existing multi-needle heads for beauty injection, such as nine-needle heads, reduce the pain of single injection by increasing the number of needles. However, since the human skin is not flat, when using a multi-needle head for injection, in order to reduce the leakage caused by some needles not piercing the human body, generally, the multi-needle head is designed with a negative pressure disc, and negative pressure is generated by suction to make the skin compact and actively move upward through the needles of the syringe. However, the upper needle cannot be manually operated and can only be used in cooperation with a machine with a suction pump (such as a hydrodermabrasion gun). However, during the use process, the machine needs to be carefully maintained to avoid liquid entering the suction pump, which may cause the machine to fail to generate negative pressure. And during the use of the machine, power problems or software failures are likely to occur, and the machine usually has a certain weight. Holding it for a long time to assist injection will easily make the hand fatigued and affect the stable injection, which is not acceptable to some people. At present, there is no manual cooperation device for multi-needle negative pressure needles. Therefore, it is necessary to improve the existing technology and develop a synchronous negative pressure injection barrel and a syringe thereof, which can cooperate with a multi-needle negative pressure needle for manual injection. Summary of the Invention

[0003] Therefore, based on the above background, the present invention provides a synchronous negative pressure injection barrel and a syringe thereof. Through manual control, the first piston assembly and the second piston assembly and their cooperation with the injection barrel, the first negative pressure barrel, and the second negative pressure barrel can synchronously suck air into the negative pressure suction cup when injecting through the injection needle to generate negative pressure, adsorb the skin, make the skin compact and actively move upward, ensure that multiple needles can pierce the skin, and reduce the occurrence of needle leakage.

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

[0005] A synchronous negative pressure syringe barrel, comprising:

[0006] An injection barrel, including an injection barrel cavity;

[0007] A first negative pressure barrel, including a first negative pressure barrel cavity;

[0008] A second negative pressure barrel, including a second negative pressure barrel cavity, and the lower parts of the first negative pressure barrel and the second negative pressure barrel are communicated;

[0009] The first piston assembly includes a first piston rod and a second piston rod. A first piston that cooperates with the syringe barrel cavity is connected to the lower end of the first piston rod, and a second piston that cooperates with the first negative pressure cavity is connected to the lower end of the second piston rod.

[0010] A second piston assembly is disposed within the second negative pressure cylinder cavity.

[0011] When the first piston moves downward along the syringe barrel, the cooperation between the first piston assembly and the second piston assembly can push the piston rod of the second piston assembly to move upward along the second negative pressure cylinder.

[0012] Further, the second piston assembly further includes a guiding partition plate. A guiding hole is formed in the lower part of the piston rod, and the piston rod is erected on the upper part of the guiding partition plate through the guiding hole and can move up and down.

[0013] Further, the end of the first piston rod away from the first piston is connected to a first push plate, and the end of the second piston rod away from the second piston is connected to a second push plate.

[0014] Further, the second piston rod passes through the first push plate, and the second push plate is located above the first push plate.

[0015] Further, a third push plate is provided between the second piston rod and the first push plate.

[0016] Further, a first limiting ring is provided above the piston rod in the second negative pressure cylinder cavity.

[0017] Based on the same inventive concept, the present invention further provides a synchronous negative pressure syringe, which includes the above-mentioned synchronous negative pressure syringe barrel and a negative pressure needle for cooperative use.

[0018] Further, the needle includes a connecting head detachably connected to the nipple of the syringe barrel, a needle plate, and a negative pressure suction cup. The negative pressure suction cup is communicated with the second negative pressure cylinder through a suction pipe.

[0019] Two or more hollow injection needles are provided on the needle plate; the injection needles are communicated with the syringe barrel cavity.

[0020] When the syringe injects through the needle, the cooperation between the first piston assembly and the second piston assembly simultaneously sucks air into the negative pressure suction cup to generate negative pressure.

[0021] Further, both the needle plate and the negative pressure suction cup are square.

[0022] Further, the suction pipe is a flexible pipe.

[0023] Adopting the above technical solutions, the beneficial effects are as follows:

[0024] The present invention is manually controlled. Through the first piston assembly and the second piston assembly and their cooperation with the syringe, the first negative pressure cylinder, and the second negative pressure cylinder, negative pressure can be generated by sucking air into the negative pressure suction cup of the negative pressure needle during injection through the injection needle, creating adsorption on the skin, making the skin compact and actively upward, ensuring that multiple needles can penetrate the skin, and reducing the occurrence of needle leakage;

[0025] In the present invention, first press the second push plate. When the second piston moves downward, the second piston squeezes to pressurize the gas in the first negative pressure cylinder, and the pressurized gas passes through the ventilation hole into the first cavity of the second negative pressure cylinder. After that, the pressurized gas pushes the piston column upward. When the piston column moves upward, it generates suction on the gas in the second cavity, and generates suction on the gas in the cavity of the negative pressure suction cup. A negative pressure is formed in the negative pressure suction cup on the skin, initially making the skin upward. Try to make multiple needles penetrate the skin. Until the third push plate abuts against the first push plate, then continue to press down the second push plate. Then the third push plate drives the first push plate downward, which can simultaneously push the first piston and the second piston downward to apply pressure. Then the injection liquid in the syringe is injected into the skin through the needle of the injection needle. At the same time, the first piston squeezes to pressurize the gas in the first negative pressure cylinder, and the pressurized gas continues to pass through the ventilation hole into the first cavity of the second negative pressure cylinder. After that, the pressurized gas pushes the piston column upward. When the piston column moves upward, it generates suction on the gas in the second cavity, and further generates suction on the gas in the cavity of the negative pressure suction cup, further increasing the adsorption on the skin, preventing the needle from detaching from the human body, and further reducing the occurrence of needle leakage.

[0026] Compared with the injection with a machine in cooperation with a negative pressure needle, the present invention is light in weight and does not require maintenance of the machine, which can further enrich the market variety and meet the needs of more people. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is a schematic cross-sectional structure diagram of Embodiment 1 of the present invention.

[0029] Figure 2 It is a schematic structure of Embodiment 1 of the present invention Figure 1 .

[0030] Figure 3 It is a schematic structure of Embodiment 1 of the present invention Figure 2 .

[0031] Figure 4 Schematic structural diagram of the cylinder body of Embodiment 1 of the present invention.

[0032] Figure 5 Schematic structure of the second piston assembly of the present invention Figure 1 .

[0033] Figure 6 Schematic structure of the second piston assembly of the present invention Figure 2 .

[0034] Figure 7 Schematic structural diagram of Embodiment 2 of the present invention.

[0035] Figure 8 Schematic enlarged structural diagram of the circled part of the present invention.

[0036] Figure 9 Schematic cross-sectional structural diagram of Embodiment 2 of the present invention.

[0037] Figure 10 Schematic structure of Embodiment 3 of the present invention Figure 1 .

[0038] Figure 11 Schematic structure of Embodiment 3 of the present invention Figure 2 . Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0041] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0042] The present invention will be further described below with reference to the accompanying drawings.

[0043] Example 1: According to Figures 1 to 6 A synchronous negative pressure syringe barrel as shown, comprising:

[0044] An injection barrel 1, including an injection barrel cavity;

[0045] A first negative pressure barrel 2, including a first negative pressure barrel cavity;

[0046] A second negative pressure barrel 3, including a second negative pressure barrel cavity, the lower parts of the first negative pressure barrel 2 and the second negative pressure barrel 3 being communicated; specifically, both the first negative pressure barrel and the second negative pressure barrel are bottom-sealed at the bottom, and ventilation holes 8 are provided at the lower parts of the barrel walls of the first negative pressure barrel 3 and the second negative pressure barrel 3.

[0047] The outer barrel walls of the injection barrel and the first negative pressure barrel 2 are partially connected, and the outer barrel walls of the first negative pressure barrel and the second negative pressure barrel are partially connected. Specifically, as shown in Figure 2 and Figure 3 shown, in one implementation, the injection barrel, the first negative pressure barrel and the second negative pressure barrel can be integrally formed.

[0048] A first piston assembly 4, including a first piston rod 4-2 and a second piston rod 4-3. The lower end of the first piston rod 4-2 is connected with a first piston 4-2-1 that cooperates with the injection barrel cavity, and the lower end of the second piston rod 4-3 is connected with a second piston 4-3-1 that cooperates with the first negative pressure cavity;

[0049] A second piston assembly 7, the second piston assembly 7 being arranged in the second negative pressure barrel cavity;

[0050] The second piston assembly 7 includes a piston column 7 that cooperates with the second negative pressure barrel cavity and a guiding partition 7-2. A guiding hole 7-1-1 is opened at the lower part of the piston column 7, and the piston column 7 is arranged on the upper part of the guiding partition 7-2 in a vertically movable manner through the guiding hole 7-1-1. Specifically, as shown in Figure 1 shown, the bottom of the guiding partition 7-2 is connected with the bottom sealing plate of the second negative pressure barrel. The guiding partition and the barrel wall of the second negative pressure barrel enclose a first cavity and a second cavity, and the ventilation hole 8 is located on the corresponding barrel wall in the first cavity, that is, the first negative pressure barrel cavity is communicated with the first cavity.

[0051] The end of the first piston rod 4-2 away from the first piston 4-2-1 is connected to the first push plate 4-1, and the end of the second piston rod 4-3 away from the second piston 4-3-1 is connected to the second push plate 4-3-2. A third push plate 4-3-3 is provided between the second piston column 4-3, the second push plate 4-3-2 and the first push plate 4-1. The second piston rod 4-3 passes through the first push plate 4-1, that is, the first push plate is provided with a through hole through which the second piston rod can pass.

[0052] Example 2: According to Figures 1 to 9 A synchronous negative pressure syringe as shown, which includes the synchronous negative pressure syringe barrel of Example 1 and further includes a negative pressure needle.

[0053] The negative pressure needle includes a connector 5-1 detachably connected to the nipple 1-1 of the syringe barrel 1, a needle plate 5-3 and a negative pressure suction cup 5-2. The negative pressure suction cup 5-2 is communicated with the second negative pressure cylinder 3 through a suction pipe 6;

[0054] More than 2 hollow injection needles 5-4 are provided on the needle plate 5-3; the injection needles 5-4 are communicated with the syringe barrel cavity. Specifically, liquid holes are opened on the needle plate corresponding to the injection needles.

[0055] In specific applications, the needle tip of the injection needle extends beyond the cavity of the negative pressure suction cup. There may be other examples. In order to control the injection depth, a silica gel sleeve body is provided on the needle plate. The injection needle passes through the silica gel sleeve body, and an adhesive is filled in the silica gel sleeve body to adhesively connect with the needle body of the injection needle.

[0056] The first piston assembly 4 and the second piston assembly 7 cooperate to suck air into the negative pressure suction cup 5-2 to generate negative pressure synchronously when the syringe barrel injects through the needle 5-4. Both the needle plate 5-3 and the negative pressure suction cup 5-2 are square. In specific applications, the number of the injection needles can be 6 or 9. In specific applications, the negative pressure suction cup is made of transparent silica gel material to facilitate observing the situation inside the cavity of the negative pressure suction cup.

[0057] The suction pipe 6 is a flexible pipe. In specific applications, a first connecting pipe communicated with the second cavity is provided at the bottom of the second negative pressure cylinder, a second connecting pipe communicated with the cavity inside the disc is provided on the side wall of the negative pressure suction cup, and both ends of the suction pipe are sleeved on the first connecting pipe and the second connecting pipe respectively, with an interference fit. In specific applications, the suction pipe can be made of transparent silica gel.

[0058] In specific applications, the connector is a deformable cylinder body, which is detachably installed on the syringe barrel by sleeving outside the nipple of the syringe barrel. There may be other example ways. If the connector is a male Luer connector, the nipple of the syringe barrel is correspondingly set as a female Luer connector.

[0059] In the specific application of this embodiment, more specifically, an indication line (not shown) is provided below the second piston rod 4-3 on the third push plate 4-3-3. The indication line surrounds the second piston rod. More specifically, a scale line (not shown) is provided on the first piston rod. Then, in the specific application, the negative pressure suction cup is placed over the part to be injected. When pressing the second push plate (before pressing the second push plate, before placing the negative pressure suction cup on the skin to be injected, the bottom edge of the indication line is roughly aligned with the upper edge of the first push plate), before the third push plate and the first push plate come into contact, the first piston rod does not move. During the downward movement of the second piston rod, the gas in the first negative pressure cylinder cavity is squeezed, enters the first cavity through the ventilation hole, generates an upward force on the piston column, and drives the piston column upward. Then, when the piston column moves upward, it generates suction on the gas in the second cavity, and further sucks the gas in the cavity of the negative pressure suction cup, making the negative pressure generated in its cavity, adsorbing on the skin, initially lifting the skin upward. Try to make the multi-needles penetrate the skin. Until the third push plate abuts against the first push plate, then continue to press the second push plate. Then the third push plate drives the first push plate downward, and the first piston and the second piston can be simultaneously pushed downward to apply pressure. Then the injection liquid in the syringe is injected into the skin through the needle of the injection needle. At the same time, the first piston squeezes to pressurize the gas in the first negative pressure cylinder, and the pressurized gas continues to pass through the ventilation hole into the first cavity of the second negative pressure cylinder. After that, the pressurized gas pushes the piston column upward. When the piston column moves upward, it generates suction on the gas in the second cavity, and further sucks the gas in the cavity of the negative pressure suction cup, further increasing the adsorption on the skin, avoiding the needle from detaching from the human body, and further reducing the needle leakage situation. Until the first piston rod moves downward to a certain distance (calculated by the scale value on the first piston rod), the injection of the corresponding part is completed. Then, gently lift the edge of the negative pressure suction cup with your hand to make the negative pressure suction cup detach from the human skin. Then, pull the second piston rod away from the first push plate 4-1 until the bottom edge of the indication line is roughly aligned with the upper edge of the first push plate. Then, move the syringe with the negative pressure suction cup to the next part to be injected, and perform the injection operation as above. Until the first piston rod moves downward to a certain distance, this can be used to repeatedly inject multiple parts. Preferably, when performing multiple injections, the distance of the downward movement of the second piston rod is fixed or close each time. For example, the first piston rod 4-2 is provided with a reference scale value.

[0060] There may be another embodiment. A first limit ring 10 is provided above the piston column 7-1 in the second negative pressure cylinder cavity, and a second limit ring 99 is provided above the second piston in the first negative pressure cylinder cavity to limit the upward movement of the piston column or the piston and prevent it from detaching from the cylinder cavity.

[0061] In the specific application of this embodiment, the negative pressure needle is not the key improvement content of the present invention. Therefore, the structure of the negative pressure needle of the present invention can also adopt existing products. For example, the Chinese invention patent "A Nine-hole Negative Pressure Injection Needle" with the application number 2020206748055, then the nipple of the syringe barrel is a Luer connector that mates with it.

[0062] Embodiment 3: According to Figures 1 to 11 A synchronous negative pressure syringe as shown, specifically as Figure 10 and Figure 11 shown, it further includes an auxiliary mechanism. The auxiliary mechanism includes a vertical first toothed plate 12 below the second push plate 4-3-2, a vertical second toothed plate 13 on the side of the third piston rod 11 on the piston column, and a gear set. The top of the first negative pressure cylinder and the syringe barrel is provided with a peripheral plate. The gear set is installed on the peripheral plate. The gear set includes a first gear 16 meshing with the first toothed plate and a second gear 15 meshing with the second toothed plate. The first gear and the second gear are meshed with each other.

[0063] The auxiliary mechanism of this embodiment assists the first piston assembly and the second piston assembly to cooperate. While the first piston moves downward to push the liquid through the injection needle for injection, it realizes the suction of the negative pressure suction cup of the negative pressure needle to generate negative pressure, making it more labor-saving.

[0064] The present invention and its embodiments have been described above. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the spirit of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A synchronous negative pressure syringe barrel, characterized in that, Comprising: A syringe barrel, including a syringe barrel cavity; A first negative pressure barrel, including a first negative pressure barrel cavity; A second negative pressure barrel, including a second negative pressure barrel cavity, the lower parts of the first negative pressure barrel and the second negative pressure barrel being connected; A first piston assembly, including a first piston rod and a second piston rod, a first piston cooperating with the syringe barrel cavity being connected to the lower end of the first piston rod, and a second piston cooperating with the first negative pressure cavity being connected to the lower end of the second piston rod; A second piston assembly, the second piston assembly being disposed within the second negative pressure barrel cavity; When the first piston moves downward along the syringe barrel, the first piston assembly and the second piston assembly cooperate to push the piston rod of the second piston assembly to move upward along the second negative pressure barrel.

2. The syringe barrel with synchronous negative pressure according to claim 1, wherein, The second piston assembly further includes a guiding partition plate, a guiding hole being formed in the lower part of the piston rod, and the piston rod being movably mounted above the guiding partition plate through the guiding hole.

3. The syringe barrel with synchronous negative pressure according to claim 1, characterized in that, The end of the first piston rod remote from the first piston is connected to a first push plate, and the end of the second piston rod remote from the second piston is connected to a second push plate.

4. A synchronous negative pressure syringe barrel according to claim 3, characterized in that, The second piston rod passes through the first push plate, and the second push plate is located above the first push plate.

5. A synchronous negative pressure syringe barrel according to claim 4, characterized in that, A third push plate is provided between the second piston rod and the first push plate.

6. A synchronous negative pressure syringe barrel according to claim 2, characterized in that, A first limiting ring is provided above the piston rod 7-1 in the second negative pressure barrel cavity.

7. A synchronous negative pressure syringe, characterized in that, It includes the synchronous negative pressure syringe barrel according to any one of claims 1 to 7 and a negative pressure needle for cooperative use.

8. A synchronous negative pressure syringe according to claim 7, characterized in that, The negative pressure needle includes a connector detachably connected to the nipple of the syringe barrel, a needle plate, and a negative pressure suction cup, the negative pressure suction cup being communicated with the second negative pressure barrel through a suction pipe; More than 2 hollow injection needles are provided on the needle plate; the injection needles are communicated with the syringe barrel cavity, When the syringe barrel injects through the needle, the first piston assembly and the second piston assembly cooperate to suck air into the negative pressure suction cup to generate negative pressure.

9. A synchronous negative pressure syringe barrel according to claim 1, characterized in that, Both the needle plate and the negative pressure suction cup are square.

10. A synchronous negative pressure syringe according to claim 8, characterized in that, The suction pipe is a flexible pipe.

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