Injector capable of quickly releasing thread force transmission

Abstract

The utility model belongs to the technical field of medical injection, and provides an injector capable of quickly releasing thread force transmission, which comprises a handle component, a sleeve, a piston and a precise injection component, the handle assembly comprises a handle rod, and an external thread structure is arranged on the outer surface of the handle rod. The precise injection assembly comprises a shell, at least two locking blocks and a locking ring; the locking blocks are located in the shell and can move in the radial direction. A first guide face is arranged at the end, away from the piston, of each locking block, and an internal thread structure is arranged on the face, facing the handle rod, of each locking block. The locking ring is arranged on the side, away from the piston, of the locking block and can move in the axial direction, and a second guide face is arranged on the locking ring. An elastic element is further included. The injection amount can be accurately controlled, pressure can be quickly released in the injection process, and the phenomenon of leakage caused by excessive injection into a vertebral body is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of medical injection technology, specifically relating to a syringe that can quickly release the force transmitted by the thread. Background Technology

[0002] Syringes are common medical instruments used to draw or inject gases, liquids, or other mixtures. Precise injection during surgery is crucial; for example, a key step in vertebroplasty is injecting bone cement into the vertebral cavity to maintain the desired height and shape of the vertebra. However, leakage of bone cement into surrounding tissues during injection is the greatest risk of vertebroplasty. While most cases do not cause clinical symptoms, it can lead to complications such as refracture of adjacent vertebrae, spinal cord injury, and pulmonary embolism.

[0003] Therefore, in order to avoid medical accidents caused by the injection of excessive medical media, it is necessary to develop a syringe that can accurately inject and rapidly release injection pressure. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a syringe that can quickly release the threaded force. This syringe can accurately control the injection volume and can quickly release pressure during the injection process to avoid over-injection and medical accidents.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A syringe capable of rapidly releasing threaded force includes a handle assembly, a sleeve, a piston, and a precision injection assembly;

[0007] The handle assembly includes a handle rod with an external thread structure on its outer surface; the piston is disposed in the inner cavity of the sleeve, and one end of the handle rod can drive the piston to move axially in the inner cavity of the sleeve to achieve injection;

[0008] The precision injection assembly includes a housing, at least two locking blocks, and a locking ring; wherein...

[0009] The housing is disposed at the non-injection end of the sleeve; each of the locking blocks is located inside the housing and can move radially, and is circumferentially and evenly distributed on the radially outer side of the handle rod; each of the locking blocks has a first guide surface at the end away from the piston, and each of the locking blocks has an internal thread structure on the side facing the handle rod;

[0010] The locking ring is located on the side of the locking block away from the piston and can move axially. The locking ring is provided with a second guide surface.

[0011] It also includes an elastic element for controlling the reset of each of the locking blocks;

[0012] By controlling the axial movement of the locking ring to cause the second guide surface to engage or disengage with the first guide surface, the locking blocks are controlled to overcome the elastic force of the elastic element and radially retract or radially expand; when the locking blocks retract, the internal thread structure forms an internal thread hole that engages with the external thread structure.

[0013] In a preferred embodiment of this utility model, the first guide surface is disposed on the outer surface of the locking block, and the first guide surface is inclined.

[0014] The second guide surface is annularly disposed on the inner cavity wall of the locking ring, and the second guide surface is inclined and matches the first guide surface;

[0015] As the locking ring moves axially toward the locking block, the inner cavity of the locking ring gradually encloses each of the locking blocks, and under the cooperation of the second guide surface and the first guide surface, the locking blocks move radially closer together to form an internal threaded hole.

[0016] The elastic force of the elastic element always causes each of the locking blocks to spread radially.

[0017] A preferred embodiment of this utility model further includes a driving block;

[0018] The drive block is sleeved on the handle rod and located on the side of the locking ring away from the locking block. The outer surface of the drive block is provided with several spiral grooves.

[0019] The housing is provided with a plurality of guide protrusions, and the plurality of guide protrusions are correspondingly engaged with the plurality of spiral grooves;

[0020] When the drive block is screwed, the drive block can be moved axially under the guidance of the spiral groove and the guide protrusion.

[0021] Preferably, the drive block has a plurality of lugs at one end away from the locking ring, and the lugs protrude radially. Preferably, the housing cavity has a first cavity; the locking ring is disposed in the first cavity, the outer diameter of the locking ring matches the inner diameter of the first cavity, and the locking ring can reciprocate axially within the first cavity.

[0022] The end of the drive block near the locking ring extends into the first cavity.

[0023] Preferably, a second cavity is provided on the side of the first cavity near the piston; a portion of each locking block is disposed in the second cavity, and a portion of each locking block having the first guide surface is located in the first cavity;

[0024] A third cavity is provided on the side of the second cavity near the piston, and the inner diameter of the third cavity is larger than that of the second cavity; a limiting ring is provided at the end of each locking block near the piston, and the diameter of the limiting ring is larger than that of the main body of the locking block, and the limiting ring is correspondingly embedded in the third cavity.

[0025] Preferably, a fourth chamber and a fifth chamber are sequentially arranged on the side of the third chamber closest to the piston; the inner diameter of the fourth chamber is larger than the inner diameter of the fifth chamber.

[0026] The non-injection end of the sleeve is provided with a retaining ring, which is embedded in the fourth cavity. The non-injection portion of the sleeve is located in the fifth cavity, and the sleeve extends out from the fifth cavity.

[0027] In a preferred embodiment of this utility model, two locking blocks are provided, and the two locking blocks are symmetrically arranged; one locking block is provided with a guide post, and the other locking block is provided with a guide hole, and the guide post cooperates with the guide hole.

[0028] In a preferred embodiment of this utility model, the injection end of the sleeve is provided with a sleeve cap, which is connected to the injection end of the sleeve by a threaded structure.

[0029] A sealing ring is provided between the sleeve cap and the injection end of the sleeve; a sealing ring is provided on the outer surface of the piston.

[0030] A preferred embodiment of this utility model further includes a stirring assembly;

[0031] The stirring assembly includes a stirring ring, a push-pull rod, and a push-pull handle; the stirring ring is disposed in the inner cavity of the sleeve and is located between the piston and the injection end; one end of the push-pull rod is detachably connected to the stirring ring, and the other end extends out of the sleeve and is connected to the push-pull handle.

[0032] Compared with the prior art, the beneficial effects of this utility model are:

[0033] This invention relates to a syringe with a rapidly releasing threaded force transmission mechanism. On the one hand, it can precisely control the axial movement of the handle rod through the threaded engagement, thereby accurately controlling the injection volume. On the other hand, it can quickly release the threaded engagement of the handle rod, allowing the piston to also quickly release pressure, avoiding the injection of excessive media, such as bone cement. This facilitates precise and stable control during the injection process. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a perspective view of the syringe of this utility model that can quickly release the force transmitted by the thread.

[0036] Figure 2 for Figure 1 Exploded view.

[0037] Figure 3 for Figure 2 Enlarged view of part of the image.

[0038] Figure 4 A partial cross-sectional view of the precision injection component.

[0039] Figure 5 This is a first cross-sectional view of the syringe of the present invention, which can quickly release the force transmitted by the thread.

[0040] Figure 6 for Figure 5 Enlarged view of part of the image.

[0041] Figure 7 This is a second cross-sectional view (partial) of the syringe of the present invention that can quickly release threaded force transmission.

[0042] in:

[0043] 1-Handle, 101-Handle lever, 102-Turning handle;

[0044] 2-Drive block, 201-Helical groove, 202-Lug;

[0045] 3-Housing shell, 301-Housing cover, 3011-Card slot, 3012-Guide protrusion, 3013-First cavity, 3014-Second cavity, 3015-Third cavity, 3016-Fourth cavity, 3017-Fifth cavity;

[0046] 4-Fixing ring, 401-Clip block;

[0047] 5-Sleeve, 501-Snap ring;

[0048] 6-Sleeve cap;

[0049] 7-Luhr joint;

[0050] 8-Stirring assembly, 801-Stirring ring, 802-Push-pull rod, 803-Push-pull handle;

[0051] 9-Sealing ring;

[0052] 10 - Sealing ring;

[0053] 11-Locking block, 1101-Guide hole, 1102-Guide post, 1103-First guide surface, 1104-Limiting ring;

[0054] 12-Piston;

[0055] 13-Locking ring, 1301-Second guide surface;

[0056] 14-Elastic element. Detailed Implementation

[0057] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0059] Example 1

[0060] See Figures 1-7 This embodiment discloses a syringe that can quickly release threaded force transmission, including a handle assembly 1, a sleeve 5, a piston 12, and a precision injection assembly.

[0061] The handle 1 assembly in this embodiment includes a handle rod 101 and a screw handle 102; the outer surface of the handle rod 101 is provided with an external thread structure; the piston 12 is disposed in the inner cavity of the sleeve 5, and the handle rod 101 is disposed in the inner cavity of the sleeve 5, and one end of the handle rod 101 located in the inner cavity of the sleeve 5 can drive the piston 12 to move axially in the inner cavity of the sleeve 5 to realize injection; one end of the sleeve 5 is the injection end, used for the extrusion of the medium in the sleeve, and the other end is the connection end, used for the connection and installation of the precision injection assembly.

[0062] The precision injection assembly includes a housing 3, at least two locking blocks 11, a locking ring 13, and an elastic element 14 for controlling the reset of each locking block 11. The housing 3 is located at the non-injection end of the sleeve 5; each locking block 11 is located within the housing 3 and is radially movable, and is circumferentially evenly distributed radially outside the handle rod 101; each locking block 11 has a first guide surface 1103 at its end away from the piston 12, and an internal thread structure on the side of each locking block 11 facing the handle rod 101. The locking ring 13 is located on the side of the locking block 11 away from the piston 12 and is axially movable; the inner cavity of the locking ring 13 has a second guide surface 1301. By controlling the axial movement of the locking ring 13 to cause the second guide surface 1301 to engage or disengage with the first guide surface 1103, the locking blocks 11 are controlled to overcome the elastic force of the elastic element 14 to radially retract or radially expand; when each locking block 11 retracts, its internal thread structure forms an internal threaded hole that engages with the external thread structure.

[0063] Furthermore, the first guide surface 1103 is disposed on the outer surface of the locking block 11, and the first guide surface 1103 is inclined (its inclination direction can be seen from...). Figures 3-4 The second guide surface 1301 is annularly disposed on the inner wall of the locking ring 13, and the second guide surface 1301 is inclined and matches the first guide surface 1103. When the locking ring 13 moves axially closer to the locking block 11, the inner cavity of the locking ring 13 gradually covers each locking block 11, and under the cooperation of the second guide surface 1301 and the first guide surface 1103, the locking blocks 11 are caused to move radially closer to form an internal threaded hole. The elastic force of the elastic element 14 always causes the locking blocks 11 to spread radially.

[0064] In this embodiment, the engagement of two guide surfaces allows for rapid control of the locking blocks 11 to retract and form internal threaded holes. This enables the external thread structure on the handle 101 to engage with the internal threaded holes, allowing for precise control of the injection volume of the medical medium by turning the handle 101. After injection, the elastic force of the elastic element 14 causes the locking blocks 11 to move radially outward while simultaneously causing the locking ring 13 to move axially away from the locking blocks 11. The two guide surfaces no longer form a constraint, and the locking blocks 11 quickly diffuse and separate radially outward under the elastic force, thus rapidly releasing the threads of the handle 101. This prevents the handle 101 from applying pressure to the piston 12, achieving rapid pressure release and effectively preventing the injection of excessive medical medium.

[0065] In this embodiment, the locking blocks 11 are controlled to retract or expand by using the second guide surface 1301 to cover the first guide surface 1103. Alternatively, the second guide surface 1301 can be used to push open the first guide surface 1103. For example, the first guide surface 1103 on each locking block 11 is also inclined, and the elastic force of the elastic element 14 always causes each locking block 11 to retract, meaning that the initial state of each locking block 11 is a retracted state, maintaining a threaded connection with the handle rod 101. In the retracted state, the first guide surface 1103 of each locking block 11 forms an annular guide surface located on the inner side. The second guide surface 1301 can be located on the outer side of the locking ring 13 and is also inclined. When the locking ring 13 moves axially toward the locking block 11, the second guide surface 1301 of the locking ring 13 is inserted into the annular guide surface, and gradually, by utilizing the cooperation of the first guide surface 1103 and the second guide surface 1301, the locking ring 13 pushes open each locking block 11, causing each locking block 11 to overcome the elastic force of the elastic element 14 and move radially outward, thereby releasing the external thread structure of the handle rod 101 and quickly releasing the pressure of the piston 12.

[0066] The precision injection assembly of this embodiment also includes a drive block 2, which is used to facilitate quick control of the locking ring 13. The drive block 2 is sleeved on the handle rod 101 and located on the side of the locking ring 13 away from the locking block 11. The outer surface of the drive block 2 is provided with a plurality of spiral grooves 201. The housing 3 is provided with a plurality of guide protrusions 3012, which correspond one-to-one with the spiral grooves 201. When the drive block 2 is turned, it can be moved axially under the guidance of the spiral grooves 201 and the guide protrusions 3012. Specifically, in this embodiment, guide protrusions 3012 are provided on the inner wall of the through hole at the end of the housing 3. The drive block 2 has a certain length in the axial direction, the spiral grooves 201 are provided on the outer surface, and the end of the drive block 2 near the locking ring 13 is provided with an abutment ring, which is located inside the housing 3.

[0067] Furthermore, the end of the drive block 2 furthest from the locking ring 13 is provided with several lugs 202, which protrude radially. In this embodiment, two lugs are provided, symmetrically arranged. The lugs 202 facilitate rapid rotation of the drive block 2, thereby controlling the axial movement of the drive block 2.

[0068] In a filler lacking a drive block 2, the locking ring 13 can be pressed to bring it axially closer to the locking block 11, thereby causing the locking block 11 to radially retract and engage with the handle rod 101. When the locking ring 13 is released, the elastic element 14 causes each locking block 11 to radially spread outward, and this elastic force can drive the locking ring 13 to move axially in the opposite direction, i.e., away from the locking block 11, thereby releasing the threaded engagement between the handle rod 101 and the locking block 11.

[0069] Furthermore, in this embodiment, with the drive block 2 in place, when precise thread injection is required, the drive block 2 is rotated and guided by the spiral groove 201 and the guide protrusion 3012, causing the drive block 2 to move closer to the locking ring 13. Simultaneously, the locking ring 13 is also pushed closer to the locking block 11. At this time, the interaction between the second guide surface 1301 and the first guide surface 1103 causes each locking block 11 to radially converge to form an internal threaded hole, which engages with the external threaded structure on the handle 101. Since the guide protrusion 3012 and the spiral groove 201 have a certain limiting effect, they can overcome the elastic force of the elastic element 14 and limit the axial position of the locking ring 13 and the drive block 2. This helps maintain the current position of each locking block 11, improves the reliability of the threaded engagement between the handle 101 and the locking block 11, and enables precise injection operations by turning the handle 101. When it is necessary to release the threaded engagement of the handle rod 101, the drive block 2 is rotated in the opposite direction, causing the drive block 2 to move away from the locking ring 13. At this time, the locking ring 13 is no longer blocked by the drive block 2. Under the elastic action of the elastic element 14, each locking block 11 expands and separates radially outward, and the locking ring 13 also separates from the locking block 11, completing the rapid release of the threaded engagement of the handle rod 101. This also completes the rapid release of the pressure of the piston 12 during the injection process, which is beneficial for accurately controlling the injection volume of medical media and avoiding over-injection.

[0070] To better cooperate with the locking block 11, locking ring 13, sleeve 5 and drive block 2, the inner cavity of the housing 3 in this embodiment can be divided into a first cavity 3013, a second cavity 3014, a third cavity 3015, a fourth cavity 3016 and a fifth cavity 3017.

[0071] The locking ring 13 is disposed in the first cavity 3013. The outer diameter of the locking ring 13 matches the inner diameter of the first cavity 3013, and the locking ring 13 can move axially back and forth in the first cavity 3013. The end of the drive block 2 near the locking ring 13 extends into the first cavity 3013.

[0072] The second cavity 3014 is located on the side of the first cavity 3013 near the piston 12; a portion of each locking block 11 is located in the second cavity 3014, and the portion of each locking block 11 with a first guide surface 1103 is located in the first cavity 3013; the third cavity 3015 is located on the side of the second cavity 3014 near the piston 12, and the inner diameter of the third cavity 3015 is larger than that of the second cavity 3014; a limiting ring 1104 is provided at one end of each locking block 11 near the piston 12, and the diameter of the limiting ring 1104 is larger than that of the main body of the locking block 11, and the limiting ring 1104 is correspondingly embedded in the third cavity 3015.

[0073] In this way, through the cooperation of the second cavity 3014 and the third cavity 3015 with the locking block 11, on the one hand, the locking block 11 can be provided with a space for radial movement, and the inner diameter of the second cavity 3014 should be larger than the outer diameter of the locking block 11 when it is closed and have a certain gap space, so as to ensure that the locking block 11 is completely separated from the external thread structure of the handle rod 101 when it is radially diffused and separated, thus achieving the release effect; on the other hand, the third cavity 3015 can also restrict the position of the locking block 11 in the axial direction, avoid the axial movement of the locking block 11 or the axial misalignment between the locking blocks 11, and ensure the smooth progress of closing and diffusion, thereby improving the precise control effect and rapid pressure release effect of the syringe that can quickly release thread force transmission.

[0074] The fourth cavity 3016 and the fifth cavity 3017 are sequentially disposed on the side of the third cavity 3015 near the piston 12; the inner diameter of the fourth cavity 3016 is larger than that of the fifth cavity 3017. A retaining ring 501 is provided at the non-injection end of the sleeve 5, and the retaining ring 501 is embedded in the fourth cavity 3016. The non-injection end portion of the sleeve 5 is located in the fifth cavity 3017, and the sleeve 5 extends out from the fifth cavity 3017.

[0075] Furthermore, the housing 3 in this embodiment includes two housing covers 301, which are detachably connected. They can be detachably assembled by the cooperation of a cylinder and a round hole, or by screws, bolts, etc. In addition, the outer wall of the fifth cavity 3017, that is, the outer surface of the end of the housing 3, is provided with a locking position 3011. After the two housing covers 301 are assembled, they are fitted onto the outer surface of the end of the housing 3 by a fixing ring 4, and the inner wall of the fixing ring 4 is provided with a locking block 401. The two housing covers 301 can be fixed and locked after assembly by the cooperation of the locking block 401 and the locking position 3011.

[0076] Two locking blocks 11 are provided, symmetrically arranged. One locking block 11 has a guide post 1102, and the other locking block 11 has a guide hole 1101, with the guide post 1102 engaging with the guide hole 1101. In this embodiment, two guide posts 1102 and two guide holes 1101 are provided, which can guide the locking blocks 11 when they retract or expand. Furthermore, the elastic element 14 in this embodiment can be a spring, which is fitted onto the guide post 1102. Of course, multiple locking blocks 11 can also be provided in this embodiment, and their number can be flexibly set according to actual conditions.

[0077] The injection end of the sleeve 5 is provided with a sleeve cap 6, which is connected to the injection end of the sleeve 5 by a threaded structure; a sealing ring 9 is provided between the sleeve cap 6 and the injection end of the sleeve 5; a sealing ring 10 is provided on the outer surface of the piston 12. The sealing ring 9 and the sealing ring 10 can improve the sealing performance inside the sleeve 5 and prevent leakage of medical media inside the sleeve 5.

[0078] The injector with rapid release threaded force transmission in this embodiment can also be used with a stirring assembly 8. The stirring assembly 8 includes a stirring ring 801, a push-pull rod 802, and a push-pull handle 803. The stirring ring 801 is disposed within the inner cavity of the sleeve 5, located between the piston 12 and the injection end. One end of the push-pull rod 802 is detachably connected to the stirring ring 801, and the other end extends outside the sleeve 5 and is connected to the push-pull handle 803. When it is necessary to stir the medium within the sleeve 5, the push-pull handle 803 is moved back and forth to cause the stirring ring 801 to stir the medium. During injection, the push-pull rod 802 can be pulled out, leaving the stirring ring 801 within the sleeve 5; this will not affect the injection of the medical medium. Alternatively, the stirring ring 801 can also be removed.

[0079] In addition, to facilitate connection with other instruments, a Luer connector 7 is provided at the end of the sleeve cap 6 in this embodiment.

[0080] The injector with rapid release of threaded force transmission in this embodiment is particularly suitable for vertebral body shaping surgery requiring precise injection of bone cement. The threaded connection enables precise injection of bone cement while simultaneously allowing for rapid release of force transmitted between the threads, thereby releasing the piston 12 within the sleeve 5 and effectively preventing excessive injection of bone cement that could lead to medical accidents. Of course, this injector with rapid release of threaded force transmission is not limited to bone cement injection; it can also be used in other surgeries or injections of other media, offering the same precise, controllable, and rapid release of threaded force to relieve pressure.

[0081] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A syringe capable of rapidly releasing threaded force transmission, characterized in that, Includes handle assembly, sleeve, piston, and precision injection assembly; The handle assembly includes a handle rod with an external thread structure on its outer surface; the piston is disposed in the inner cavity of the sleeve, and one end of the handle rod can drive the piston to move axially in the inner cavity of the sleeve to achieve injection; The precision injection assembly includes a housing, at least two locking blocks, and a locking ring; wherein... The housing is disposed at the non-injection end of the sleeve; each of the locking blocks is located inside the housing and can move radially, and is circumferentially and evenly distributed on the radially outer side of the handle rod; each of the locking blocks has a first guide surface at the end away from the piston, and each of the locking blocks has an internal thread structure on the side facing the handle rod; The locking ring is located on the side of the locking block away from the piston and can move axially. The locking ring is provided with a second guide surface. It also includes an elastic element for controlling the reset of each of the locking blocks; By controlling the axial movement of the locking ring to cause the second guide surface to engage or disengage with the first guide surface, the locking blocks are controlled to overcome the elastic force of the elastic element and radially retract or radially expand; when the locking blocks retract, the internal thread structure forms an internal thread hole that engages with the external thread structure.

2. The syringe capable of rapidly releasing threaded force transmission according to claim 1, characterized in that, The first guide surface is disposed on the outer surface of the locking block, and the first guide surface is disposed at an angle; The second guide surface is annularly disposed on the inner cavity wall of the locking ring, and the second guide surface is inclined and matches the first guide surface; As the locking ring moves axially toward the locking block, the inner cavity of the locking ring gradually encloses each of the locking blocks, and under the cooperation of the second guide surface and the first guide surface, the locking blocks move radially closer together to form an internal threaded hole. The elastic force of the elastic element always causes each of the locking blocks to spread radially.

3. The syringe capable of rapidly releasing threaded force transmission according to claim 1 or 2, characterized in that, It also includes the driver block; The drive block is sleeved on the handle rod and located on the side of the locking ring away from the locking block. The outer surface of the drive block is provided with several spiral grooves. The housing is provided with a plurality of guide protrusions, and the plurality of guide protrusions are correspondingly engaged with the plurality of spiral grooves; When the drive block is screwed, the drive block can be moved axially under the guidance of the spiral groove and the guide protrusion.

4. The syringe capable of rapidly releasing threaded force transmission according to claim 3, characterized in that, The drive block has several lugs at one end away from the locking ring, and the lugs protrude radially.

5. The syringe capable of rapidly releasing threaded force transmission according to claim 3, characterized in that, The housing has a first cavity; the locking ring is disposed in the first cavity, the outer diameter of the locking ring matches the inner diameter of the first cavity, and the locking ring can move axially back and forth in the first cavity; The end of the drive block near the locking ring extends into the first cavity.

6. The syringe capable of rapidly releasing threaded force transmission according to claim 5, characterized in that, A second cavity is provided on the side of the first cavity near the piston; a portion of each locking block is disposed in the second cavity, and a portion of each locking block having the first guide surface is located in the first cavity; A third cavity is provided on the side of the second cavity near the piston, and the inner diameter of the third cavity is larger than that of the second cavity; a limiting ring is provided at the end of each locking block near the piston, and the diameter of the limiting ring is larger than that of the main body of the locking block, and the limiting ring is correspondingly embedded in the third cavity.

7. The syringe capable of rapidly releasing threaded force transmission according to claim 6, characterized in that, The third chamber is provided with a fourth chamber and a fifth chamber in sequence on the side closest to the piston; the inner diameter of the fourth chamber is larger than the inner diameter of the fifth chamber; The non-injection end of the sleeve is provided with a retaining ring, which is embedded in the fourth cavity.

8. The syringe capable of rapidly releasing threaded force transmission according to claim 1, characterized in that, There are two locking blocks, which are symmetrically arranged; one locking block is provided with a guide post, and the other locking block is provided with a guide hole, and the guide post and the guide hole cooperate with each other.

9. The syringe capable of rapidly releasing threaded force transmission according to claim 1, characterized in that, The injection end of the sleeve is provided with a sleeve cap, which is connected to the injection end of the sleeve by a threaded structure. A sealing ring is provided between the sleeve cap and the injection end of the sleeve; a sealing ring is provided on the outer surface of the piston.

10. The injector capable of rapidly releasing threaded force transmission according to claim 1, characterized in that, It also includes a stirring component; The stirring assembly includes a stirring ring, a push-pull rod, and a push-pull handle; the stirring ring is disposed in the inner cavity of the sleeve and is located between the piston and the injection end; one end of the push-pull rod is detachably connected to the stirring ring, and the other end extends out of the sleeve and is connected to the push-pull handle.

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