Injector negative pressure suction booster

Abstract

The utility model provides a syringe negative pressure suction booster, which belongs to the technical field of liposuction surgery, and comprises a needle cylinder, a piston rod, a piston rod, a piston rod, a piston rod, a piston rod, a piston rod, a piston rod, a piston rod, a piston rod and a piston rod, and is characterized in that one end is inserted into the needle cylinder along the length direction of the needle cylinder; the piston head is located in the needle cylinder, the piston head is fixedly connected with the piston rod, and the circumferential side wall of the piston head abuts against the inner wall of the needle cylinder; the self-locking device is used for limiting movement of the piston rod. The needle cylinder has the effect of improving the negative pressure stability in the needle cylinder.

Description

Technical Field

[0001] The present application relates to the technical field of liposuction surgery, and in particular to a syringe negative pressure suction booster. Background Art

[0002] Liposuction technology was discovered in the 1960s. With the advancement of anesthesia techniques, blunt, wet, and tunnel techniques were pioneered in the 1970s. Four principles—high vacuum, subcutaneous fat pretreatment, discontinuous incision, and skin retraction—were established, creating the classic wet liposuction technique. Vacuum liposuction equipment developed based on this principle now generally meets the requirements of conventional liposuction procedures. For localized fat removal, such as in delicate areas like the cheeks, forehead, and nasolabial folds, manual liposuction using a small needle connected to a syringe is particularly important to minimize damage to fat cells and surrounding tissues caused by electric vacuum suction equipment.

[0003] Facial liposuction is a widely used cosmetic surgery procedure. Its basic principle is to utilize the low negative pressure generated by the backflow of a syringe barrel to connect a small-sized liposuction needle, thereby finely treating localized fat and achieving the best cosmetic treatment results with minimal damage.

[0004] The current liposuction technique is to pull the piston rod with one hand to suck local fat while feeling the feedback from the needle tip to adjust the treatment level and direction. As the treatment continues, maintaining this posture for a long time is undoubtedly a drain on the medical staff themselves, and it is difficult to ensure the stability of the negative pressure. Summary of the Invention

[0005] The purpose of this application is to provide a syringe negative pressure suction booster, aiming to solve the problem of poor stability of negative pressure in the syringe during liposuction in the related art.

[0006] Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

[0007] According to the first aspect of the present application, a syringe negative pressure suction booster is provided, comprising a syringe, and also comprising: a piston rod, one end of which is inserted into the syringe along the length direction of the syringe, and the other end is located outside the syringe; a piston head, the piston head is located in the syringe, and the piston head is fixedly connected to the piston rod, and the circumferential side wall of the piston head abuts against the inner wall of the syringe; a self-locking device, used to limit the movement of the piston rod.

[0008] By adopting the above technical solution, when using the booster, medical personnel first pull out the piston rod to the required length, so that a negative pressure chamber is formed at the front end part of the piston head of the syringe. The piston rod is restricted by the self-locking device so that the piston rod will not move into the syringe due to the negative pressure, so that medical personnel do not need to hold the piston rod continuously during the liposuction process. Therefore, this structure achieves the effect of stable negative pressure of the syringe during the liposuction process.

[0009] In an exemplary embodiment of the present application, the self-locking device includes a fixed platform, which is provided with a stepped portion, and the stepped portion of the fixed platform abuts against the port of the syringe; a self-locking structure is provided between the fixed platform and the piston rod for limiting the piston rod from sliding toward the inside of the syringe.

[0010] By adopting the above technical solution, the fixed platform is first adjusted to a suitable position, and then the sliding between the fixed platform and the piston rod is restricted by the self-locking structure, so that the piston rod cannot slide into the syringe, and then the fixed platform is clamped with the port of the syringe through the stepped portion, thereby achieving the effect of providing stability to the piston rod.

[0011] In an exemplary embodiment of the present application, the self-locking structure includes: a tooth structure, which is arranged on the side wall of the piston rod along the length direction of the piston rod; a pawl, which is hinged to the inside of the fixed platform and is snap-fitted with the tooth structure; a connecting plate, which is fixedly connected to one end of the pawl that is hinged and extends along a side away from the snap-fit end of the pawl; a press key, which passes through the fixed platform, and one end of the press key is located at the connecting plate, and the other end of the press key is located on the outside of the fixed platform.

[0012] By adopting the above technical solution, when the pawl is engaged with the tooth structure, the piston rod can move out of the syringe, but cannot move into the syringe, so that the piston rod can only move in one direction, which can avoid the negative pressure environment in the syringe driving the piston rod to move, and provides good stability during liposuction; if the position of the piston rod needs to be adjusted, the pawl can be pressed to no longer engage with the tooth structure, and the piston rod can be slid in the syringe.

[0013] In an exemplary embodiment of the present application, a stabilizing spring is fixedly connected between the side of the pawl facing away from the piston rod and the fixing platform, and a return spring for driving the pressing key to return is provided between the pressing key and the fixing platform.

[0014] By adopting the above technical solution, the stabilizing spring can provide elastic force for the pawl, so that the pawl is always engaged with the tooth structure during use of the booster, thereby improving the stability of the pawl; when the push button is pressed, the return spring is in a compressed state, and after releasing the push button, the return spring releases the elastic force to drive the push button back to its position.

[0015] In an exemplary embodiment of the present application, the self-locking structure includes: a tooth structure, which is arranged on the side wall of the piston rod along the length direction of the piston rod; a clamping block, which is provided with a clamping groove adapted to be clamped with the tooth structure; a press key, which is located on one side of the clamping block and passes through the fixed platform, one end of the press key is located inside the fixed platform, and the other end is located outside the fixed platform; a hinged rod, which is hinged between the press key and the clamping block, and after pressure is applied to the press key, the clamping block can be driven away from the tooth structure through the hinged rod; a return spring, which is located between the press key and the fixed platform, and after the pressure on the press key is removed, the return spring drives the press key to return to its position.

[0016] By adopting the above technical solution, when the booster is used, the clamping block is clamped and fixed with the tooth structure through the clamping groove; the fixed platform and the piston rod are fixed; the pressing key is pressed, and the pressing key drives the clamping block away from the piston rod through the hinged rod. At this time, the piston rod can continue to slide. After releasing the pressing rod, the return spring drives the pressing key to return to its position, and the pressing key can drive the clamping block to return to its position through the hinged rod.

[0017] In an exemplary embodiment of the present application, a cross section of each of the tooth structures is tapered in a direction away from the piston head.

[0018] By adopting the above technical solution, medical personnel can continue to pull the piston rod toward the outside of the syringe without pressing the push button during use, and cannot push it toward the inside of the syringe, which makes it easier for medical personnel to increase the negative pressure value during surgery.

[0019] In an exemplary embodiment of the present application, two of each of the clamping block, the pressing key and the return spring are provided and are symmetrically distributed along the piston rod, and the two clamping blocks are also symmetrically distributed along the pressing key.

[0020] By adopting the above technical solution, the stability of the fixing platform and the piston rod during fixation is further improved by clamping the tooth structure with the two clamping blocks.

[0021] In an exemplary embodiment of the present application, a pressing plate is fixedly provided at one end of the piston rod away from the piston head.

[0022] By adopting the above technical solution, it is convenient for medical personnel to move the piston rod.

[0023] The exemplary embodiments of the present application may have some or all of the following beneficial effects:

[0024] A syringe negative pressure suction booster provided in an example embodiment of the present application can limit the movement of the piston rod through a self-locking structure. After the fixed platform locks the piston rod through the self-locking structure, part of the fixed platform is inserted into the syringe and clamped, so that the stepped part of the fixed platform abuts against the port of the syringe. At this time, the piston rod cannot continue to slide toward the inside of the syringe, so that the piston head and the front end of the syringe form a constant negative pressure state, and there is no need for the staff to continuously operate the piston rod, thereby improving the stability of the constant negative pressure of the booster.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0027] Figure 1 A longitudinal cross-sectional view of a syringe negative pressure suction booster in Example 1 of the present application is shown;

[0028] Figure 2 Shown is Figure 1 A partial enlarged view of part A;

[0029] Figure 3 A longitudinal cross-sectional view of a syringe negative pressure suction booster in Example 2 of the present application is shown;

[0030] Figure 4 shows a transverse cross-sectional view of the fixing platform in Example 2 of the present application;

[0031] Figure 5 A longitudinal cross-sectional view of a syringe negative pressure suction booster in Example 3 of the present application is shown;

[0032] Figure 6 shows a transverse cross-sectional view of the fixing platform in Example 3 of the present application;

[0033] Figure 7 A longitudinal cross-sectional view of a syringe negative pressure suction booster in Example 4 of the present application is shown.

[0034] Description of reference numerals:

[0035] 1. Syringe; 2. Piston rod; 21. Piston head; 22. Press plate; 3. Fixing platform; 31. Step portion; 4. Tooth structure; 5. Ratchet; 51. Connecting plate; 52. Stabilizing spring; 6. Press key; 61. Return spring; 62. Return plate; 7. Snap block; 71. Snap groove; 8. Articulated rod; 9. Threaded hole. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present application and are not necessarily drawn to scale.

[0037] While relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It should be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through the other structure.

[0038] The terms "a", "an", "the" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first" and "second" are used only as labels and do not limit the quantity of their objects.

[0039] Example 1

[0040] The embodiment of the present application discloses a syringe negative pressure suction booster.

[0041] refer to Figure 1 and Figure 2 A syringe negative pressure suction booster includes a syringe 1 and a piston rod 2. One end of the piston rod 2 is inserted into the syringe 1 and fixedly connected to a piston head 21 inside the syringe 1. The piston head 21 abuts the inner wall of the syringe 1. The end of the piston rod 2 located outside the syringe 1 is fixedly connected to a pressing plate 22. When medical staff pull the piston rod 2 outward, the abutment between the piston head 21 and the syringe 1 forms a seal, forming a negative pressure chamber in the syringe 1 at the front end of the piston head 21.

[0042] A self-locking device for limiting the movement of the piston rod 2 is provided between the piston rod 2 and the syringe 1. The self-locking device includes a fixed platform 3. The fixed platform 3 is a stepped cylindrical structure and is provided with a stepped portion 31. The fixed platform 3 can be partially inserted into the syringe 1 and abut against the inner wall of the syringe 1 to form an interference fit. The stepped portion 31 of the fixed platform 3 abuts against the port of the syringe 1.

[0043] A self-locking mechanism is located within the mounting platform 3 to prevent the piston rod 2 from sliding. This self-locking mechanism includes a tooth structure 4, a pawl 5, and a push button 6. Several tooth structures 4 are evenly spaced along the length of the piston rod 2, and each tooth structure 4 is fixedly connected to the piston rod 2 in a direction that surrounds the circumferential sidewall of the piston rod 2. In the embodiment of the present application, the cross-section of the tooth structure 4 is conical along the direction from the piston head 21 to the pressing plate 22; the pawl 5 is located inside the fixed platform 3, and one end of the pawl 5 is hinged to the inner wall of the fixed platform 3, and the other end of the pawl 5 is engaged with the tooth structure 4. A connecting plate 51 is fixed to one end of the pawl 5 hinged to the fixed platform 3, and the connecting plate 51 extends along the direction away from the engaging side of the pawl 5, and a stabilizing spring 52 is fixedly connected between the side of the pawl 5 away from the tooth structure 4 and the inner wall of the fixed platform 3; the pressing key 6 passes through the fixed platform 3, and one end of the pressing key 6 is located on the outside of the fixed platform 3, and the other end of the pressing key 6 extends into the interior of the fixed platform 3 and is located at the connecting plate 51. The pressing key 6 passes through the interior of the fixed platform 3 and is fixed with a return plate 62. A return spring 61 is fixedly connected between the return plate 62 and the inner wall of the fixed platform 3, and the return spring 61 is sleeved on the outside of the pressing key 6.

[0044] When using the booster, medical personnel can first press the push button 6 so that the push button 6 pushes the connecting plate 51 to move. At this time, the return spring 61 is in a stretched state, and the connecting plate 51 drives the pawl 5 to rotate, so that the end of the pawl 5 is away from the tooth structure 4. At this time, the stabilizing spring 52 is in a compressed state, and medical personnel can slide the fixed platform 3 and the piston rod 2 relative to each other and adjust them to the appropriate position. Release the press button 6, the return spring 61 drives the press button 6 to return, and the stabilizing spring 52 drives the pawl 5 to return and engage with the tooth structure 4. At this time, according to the engagement principle of the pawl 5 and the tooth structure 4, the piston rod 2 can only move toward the outside of the syringe 1, and cannot move toward the inside of the syringe 1, achieving the one-way locking effect of the piston rod 2. Therefore, if the medical staff does not pull the piston rod 2, the piston head 21 forms a stable constant negative pressure state in the syringe 1 in the front part of itself. If the medical staff wants to increase the negative pressure in the syringe 1, there is no need to press the press button 6 at this time, and only the piston rod 2 needs to be pulled.

[0045] Example 2

[0046] The difference between the embodiment of the present application and embodiment 1 is that, Figure 3 and Figure 4The cross-section of the tooth structure 4 is a square structure. There are several tooth structures 4 evenly spaced along the length direction of the piston rod 2, and each tooth structure 4 is fixedly connected to the piston rod 2 in the direction of surrounding the circumferential side wall of the piston rod 2. The self-locking structure also includes a clamping block 7, a pressing key 6 and a hinged rod 8. In the embodiment of the present application, there are two clamping blocks 7, which are arranged opposite to each other and located on both sides of the piston rod 2. A clamping groove 71 is provided on the opposite side of the two clamping blocks 7, and the clamping groove 71 is clamped and adapted with the tooth structure 4; there are two pressing keys 6, which are respectively located on both sides of the middle of the two clamping blocks 7. The hinged rod 8 is hinged between the pressing key 6 and the clamping block 7, and a return spring 61 is sleeved between the end of the pressing key 6 and the fixed platform 3.

[0047] When medical personnel need to move the piston rod 2, they only need to press the two pressing keys 6 in opposite directions. At this time, the return spring 61 is in a compressed state, and the pressing key 6 drives the two clamping blocks 7 to move away from each other through the hinge rod 8, so that the fixed platform 3 and the piston rod 2 can slide relative to each other. After releasing the pressing key 6, the return spring 61 releases the elastic force to drive the pressing key 6 to return, and the two clamping blocks 7 move relative to each other, so that the clamping blocks 7 are clamped into the clamping groove 71. At this time, the piston rod 2 and the fixed platform 3 cannot slide relative to each other, achieving the effect of two-way locking of the piston rod 2, thereby providing a stable constant negative pressure state for the syringe 1 at the front end part of the piston head 21.

[0048] Example 3

[0049] The difference between the embodiment of the present application and embodiment 2 is that the cross section of the clamping block 7 is tapered along the direction from the piston head 21 to the pressing plate 22. Due to this structure, when the pressing key 6 is not pressed, the piston rod 2 is in a one-way locked state. At this time, the piston rod 2 can move toward the outside of the syringe 1 but cannot move toward the inside of the syringe 1. Therefore, if the medical staff does not pull the piston rod 2, the piston head 21 forms a stable constant negative pressure state in the syringe 1 in front of itself. If the medical staff wants to increase the negative pressure in the syringe 1, there is no need to press the pressing key 6 at this time, and only the piston rod 2 needs to be pulled.

[0050] Example 4

[0051] The embodiment of the present application differs from embodiment 1 in that the self-locking structure includes a threaded hole 9 that extends through the fixing platform 3 along the length of the piston rod 2. The circumferential sidewall of the piston rod 2 is machined with a threaded structure, and the piston rod 2 is threadedly connected to the fixing platform 3. The fixing platform 3 is rotated to the appropriate position of the piston rod 2, and then a portion of the fixing platform 3 is inserted into the syringe 1, and the stepped portion 31 of the fixing platform 3 is brought into contact with the syringe 1, thereby achieving a locking effect between the fixing platform 3 and the piston rod 2, thereby achieving a stable constant negative pressure effect on the syringe 1 at the front end of the piston head 21.

[0052] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the embodiments of the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not covered by this application. The specification and embodiments are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

Claims

1. A syringe negative pressure suction booster, comprising a syringe (1), characterized in that: Also includes: A piston rod (2) has one end inserted into the syringe (1) along the length direction of the syringe (1) and the other end located outside the syringe (1); A piston head (21), the piston head (21) is located in the syringe (1), the piston head (21) is fixedly connected to the piston rod (2), and the circumferential side wall of the piston head (21) abuts against the inner wall of the syringe (1); A self-locking device is used to limit the movement of the piston rod (2).

2. The syringe negative pressure suction booster according to claim 1, characterized in that: The self-locking device comprises a fixed platform (3), the fixed platform (3) is provided with a stepped portion (31), and the stepped portion (31) of the fixed platform (3) abuts against the end of the syringe (1); a self-locking structure is provided between the fixed platform (3) and the piston rod (2) for limiting the piston rod (2) from sliding toward the inside of the syringe (1).

3. The syringe negative pressure suction booster according to claim 2, characterized in that: The self-locking structure comprises: a tooth structure (4) provided on a side wall of the piston rod (2) along the length direction of the piston rod (2); A ratchet (5) is hinged inside the fixed platform (3) and is engaged and adapted with the tooth structure (4); A connecting plate (51) is fixedly connected to one end hinged to the pawl (5) and extends along a side away from the clamping end of the pawl (5); A press key (6) is provided, wherein the press key (6) passes through the fixing platform (3), and one end of the press key (6) is located at the connecting plate (51), and the other end of the press key (6) is located outside the fixing platform (3).

4. The syringe negative pressure suction booster according to claim 3, characterized in that: A stabilizing spring (52) is fixedly connected between the side of the pawl (5) facing away from the piston rod (2) and the fixed platform (3), and a return spring (61) for driving the press key (6) to return is provided between the press key (6) and the fixed platform (3).

5. The syringe negative pressure suction booster according to claim 2, characterized in that: The self-locking structure comprises: a tooth structure (4) provided on a side wall of the piston rod (2) along the length direction of the piston rod (2); The clamping block (7) is provided with a clamping groove (71) adapted to be clamped with the tooth structure (4); A press key (6) is located on one side of the clamping block (7) and passes through the fixing platform (3), with one end of the press key (6) being located inside the fixing platform (3) and the other end being located outside the fixing platform (3); A hinged rod (8) is hinged between the pressing key (6) and the clamping block (7), and when pressure is applied to the pressing key (6), the clamping block (7) can be driven away from the tooth structure (4) via the hinged rod (8); The return spring (61) is located between the pressing key (6) and the fixing platform (3). After the pressure on the pressing key (6) is removed, the return spring (61) drives the pressing key (6) to return.

6. The syringe negative pressure suction booster according to claim 5, characterized in that: The cross section of each tooth structure (4) is tapered in a direction away from the piston head (21).

7. A syringe negative pressure suction booster according to claim 5 or 6, characterized in that: The clamping block (7), the pressing key (6) and the return spring (61) are each provided with two, and are symmetrically distributed along the piston rod (2), and the two clamping blocks (7) are also symmetrically distributed along the pressing key (6).

8. The syringe negative pressure suction booster according to claim 2, characterized in that: The fixing platform (3) is penetrated by a threaded hole (9), the circumferential side wall of the piston rod (2) is processed with a threaded structure, and the fixing platform (3) is threadedly connected to the piston rod (2).

9. The syringe negative pressure suction booster according to claim 2, characterized in that: A pressing plate (22) is fixedly provided at one end of the piston rod (2) away from the piston head (21).

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