Medical polyether ether ketone syringe

Abstract

The application discloses a medical polyether ether ketone injector, which comprises a liquid injection barrel, a spiral push rod, a driving ring and a piston plate. One end of the liquid injection barrel is provided with an opening, and the other end is provided with a liquid injection port. The piston plate is slidably arranged in the liquid injection barrel. The side edge of the piston plate is arranged in close contact with the inner ring wall of the liquid injection barrel. The driving ring is connected to the opening end of the liquid injection barrel. The inner ring wall of the driving ring is provided with an internal thread. The driving ring is threadedly connected with the spiral push rod through the internal thread. One end of the spiral push rod extends into the liquid injection barrel and is rotationally connected with the piston plate. The application has the effects of reducing the possibility of liquid backflow during the liquid injection process and improving the accuracy of the liquid injection process.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a medical polyetheretherketone syringe. Background Technology

[0002] A syringe is a common medical device used for injecting or transferring liquids. Syringes can also be used in medical devices, containers, and, for example, in some chromatographic scientific instruments, to inject through a rubber diaphragm.

[0003] Currently, a typical syringe generally includes a needle, a syringe barrel, and a plunger. During use, the plunger is linearly pushed to slide within the syringe barrel, using air pressure to draw and inject liquid. Typically, the syringe barrel has graduations for easy observation of the injected volume.

[0004] Regarding the aforementioned technologies, the inventors believe that during the use of the syringe, the syringe barrel is in a high hydraulic environment when pushing liquid. After the operator stops applying pressure to the piston, the piston is prone to retract to some extent under the action of high hydraulic pressure, resulting in a slight backflow of liquid. Furthermore, using the scale lines on the syringe barrel to initially calculate the injection volume is inaccurate and can easily affect the accuracy of the injection volume. Utility Model Content

[0005] In order to reduce the possibility of liquid backflow during injection and improve the accuracy of the injection process, this application provides a medical polyether ether ketone syringe.

[0006] The medical polyetheretherketone syringe provided in this application adopts the following technical solution: A medical polyetheretherketone (PEEK) injector includes an injection cylinder, a helical plunger, a drive ring, and a piston plate. One end of the injection cylinder is open, and the other end has an injection port. The piston plate is slidably disposed in the injection cylinder, and the side of the piston plate is fitted against the inner ring wall of the injection cylinder. The drive ring is connected to the open end of the injection cylinder, and the inner ring wall of the drive ring is provided with an internal thread. The drive ring is threadedly connected to the helical plunger through the internal thread. One end of the helical plunger extends into the injection cylinder and is rotatably connected to the piston plate.

[0007] By adopting the above technical solution, during liquid injection, the helical pusher rotates in one direction, gradually and steadily moving towards the interior of the injection cylinder. The piston plate moves within the injection cylinder under the action of the helical pusher, and the liquid in the injection cylinder flows out through the injection port. After injection is complete, the rotation of the helical pusher stops. The helical pusher and the drive ring are threaded together, reducing the possibility of liquid backflow caused by the piston plate moving backward under hydraulic pressure. Through the mutual cooperation of the injection cylinder, helical pusher, drive ring, and piston plate, helical injection of liquid is achieved, effectively reducing the possibility of liquid backflow during injection and improving the accuracy of the injection process.

[0008] Optionally, a mounting ring groove is provided on the side of the piston plate along the circumferential direction, and a sealing ring is embedded in the mounting ring groove. The sealing ring is fitted to the inner ring wall of the injection cylinder.

[0009] By adopting the above technical solution, the sealing ring improves the sealing performance between the piston plate and the injection cylinder, reducing the possibility of liquid leakage from between the piston plate and the injection cylinder during the liquid pushing process.

[0010] Optionally, a rotating handle is connected to one end of the spiral push rod located outside the injection cylinder, and the surface of the rotating handle is provided with anti-slip texture.

[0011] By adopting the above technical solution, the rotating handle and the anti-slip texture on it make it easier for operators to rotate the screw push rod.

[0012] Optionally, an abutment ring is sleeved on the spiral push rod, and the abutment ring is located outside the injection cylinder.

[0013] By adopting the above technical solution, the setting of the abutment ring limits the advancing distance of the spiral push rod, thus avoiding collision between the rotating handle and the injection cylinder during the liquid pushing process.

[0014] Optionally, the outer sliding sleeve of the injection cylinder is provided with a sliding sleeve, one end of which is connected to the side of the abutment ring near the injection cylinder, and the injection cylinder is provided with a main scale line along its length.

[0015] By adopting the above technical solution, the sliding sleeve and the injection cylinder slide and cooperate with each other. By observing the relative position of the edge of the sliding sleeve and the main scale line, the amount of liquid pushed can be observed.

[0016] Optionally, the outer ring wall of the injection cylinder away from the abutment ring is provided with a contact cone surface along the circumferential direction, and a secondary scale line is provided on the contact cone surface along the circumferential direction.

[0017] By adopting the above technical solution, since the spiral pusher will advance the sliding sleeve a fixed distance when it rotates once, a more accurate liquid volume can be obtained by adding the value on the main scale line and the value on the secondary scale line, which helps the operator to measure the liquid volume more accurately.

[0018] Optionally, a limiting toothed ring is fitted on the sliding sleeve, and a limiting arc block is provided on the outer ring wall of the injection cylinder. The limiting arc block can slide along the length direction of the injection cylinder, and limiting teeth are provided on the side of the limiting arc block and the limiting toothed ring that are close to each other.

[0019] By adopting the above technical solution, after a certain amount of liquid has been pushed, the sliding limiting arc block is slid until the limiting teeth on the limiting slider and the limiting teeth on the limiting ring mesh with each other, thereby limiting the sliding sleeve and the spiral push rod, reducing the possibility that the spiral push rod will continue to rotate due to collision and push the liquid.

[0020] Optionally, the injection cylinder is connected to a connecting pipe that communicates with the injection port, and an installation pipe is detachably connected to the connecting pipe. An injection head is connected to the end of the installation pipe away from the injection cylinder.

[0021] By adopting the above technical solution, mounting tubes with injection heads of different specifications can be connected to the connecting tube to meet different injection needs, thus expanding the applicability of the syringe.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the injection cylinder, spiral pusher, drive ring and piston plate, the liquid is spirally pushed, which reduces the possibility of liquid backflow during the injection process and improves the accuracy of the injection process; 2. To meet different injection needs, mounting tubes with injection heads of different specifications are connected to the connecting tube, thus expanding the applicability of the syringe; 3. By adding the values ​​on the main scale line to the values ​​on the sub-scale line, a more accurate liquid volume can be obtained, which helps operators to measure the liquid volume more precisely. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a medical polyether ether ketone syringe, as illustrated in Embodiment 1 of this application.

[0024] Figure 2 This is a partial cross-sectional view of Embodiment 1 of this application, used to illustrate the internal structure of the injection cylinder.

[0025] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0026] Figure 4 This is a schematic diagram of the structure of a medical polyetheretherketone syringe, as shown in Embodiment 2 of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Injection cylinder; 101. Injection port; 102. Snap-fit ​​groove; 103. Main scale line; 104. Sliding groove; 2. Drive ring; 3. Connecting pipe; 4. Helical push rod; 5. Sliding sleeve; 51. Contact cone surface; 52. Secondary scale line; 6. Piston plate; 61. Mounting ring groove; 7. Injection head; 8. Snap-fit ​​block; 9. Rotating handle; 91. Anti-slip texture; 10. Sealing ring; 11. Abutment ring; 12. Limiting toothed ring; 13. Sliding block; 14. Limiting arc block; 141. Relief groove; 15. Limiting teeth; 16. Mounting pipe. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be further described in detail below. Embodiments of this application provide a medical polyetheretherketone (PEEK) syringe, which reduces the possibility of liquid backflow during injection and improves the accuracy of the injection process.

[0029] Example 1 Reference Figure 1 and Figure 2 A medical polyetheretherketone (PEEK) syringe includes an injection cylinder 1, a drive ring 2, a spiral push rod 4, a sliding sleeve 5, a piston plate 6, and an injection head 7. The injection cylinder 1 is cylindrical, with one end open and the other end coaxially provided with an injection port 101.

[0030] Reference Figure 1 and Figure 2 The drive ring 2 is connected to the open end of the injection cylinder 1, and is perpendicular to the length direction of the injection cylinder 1. Several locking blocks 8 are connected circumferentially along the edge of the drive ring 2. Several locking grooves 102 are provided at the open end of the injection cylinder 1, and each locking groove 102 corresponds to a locking block 8, with the locking block 8 embedded in the corresponding locking groove 102. An internal thread is provided on the inner ring wall of the drive ring 2, and the spiral push rod 4 is threadedly connected to the inner ring wall of the drive ring 2. A rotating handle 9 is connected to the end of the spiral push rod 4 located outside the injection cylinder 1, and the rotating handle 9 is provided with anti-slip texture 91. A piston plate 6 is connected to the end of the spiral push rod 4 located inside the cavity of the injection cylinder 1, and the edge of the piston plate 6 slides against the inner ring wall of the injection cylinder 1.

[0031] Reference Figure 1-3The piston plate 6 has a mounting ring groove 61 along its circumferential direction on its edge. A sealing ring 10 is embedded in the mounting ring groove 61, and the sealing ring 10 fits tightly against the inner ring wall of the injection cylinder 1. An abutment ring 11 is connected to the rod section of the spiral push rod 4 located outside the injection cylinder 1. The sliding sleeve 5 is located outside the injection cylinder 1, and one end of the sliding sleeve 5 is connected to the side of the abutment ring 11 near the injection cylinder 1. A contact cone surface 51 is formed along its circumferential direction on the outer ring wall of the sliding sleeve 5 away from the abutment ring 11. A main scale line 103 is provided along its length on the outer wall of the injection cylinder 1, and a secondary scale line 52 is provided along its circumferential direction on the contact cone surface 51.

[0032] Reference Figure 3 A limiting toothed ring 12 is connected to the outer ring wall of the sliding sleeve 5. A sliding groove 104 is formed along the length of the outer ring wall of the injection cylinder 1. A sliding block 13 is slidably arranged in the sliding groove 104. A limiting arc block 14 is provided on the outer wall of the injection cylinder 1. The side of the limiting arc block 14 that is in contact with the injection cylinder 1 is connected to the sliding block 13. A corresponding clearance groove 141 is formed on the side of the limiting arc block 14 near the sliding sleeve 5. Limiting teeth 15 are provided on the sides of the limiting arc block 14 and the limiting toothed ring 12 that are close to each other.

[0033] Reference Figure 1 and Figure 3 One end of the injection head 7 is coaxially connected to an installation tube 16, and the outside of the injection cylinder 1 is connected to a connecting tube 3 that communicates with the injection port 101. The outer ring wall of the connecting tube 3 and the inner ring wall of the installation tube 16 are both provided with corresponding threads, and the outer ring wall of the connecting tube 3 is threadedly connected to the inner ring wall of the installation tube 16.

[0034] Reference Figure 1-3 When injecting liquid into the injection cylinder 1, the spiral push rod 4 is rotated in one direction by turning the handle 9. The anti-slip texture 91 on the handle 9 increases the friction of the surface of the handle 9. Due to the threaded connection between the drive ring 2 and the spiral push rod 4, the spiral push rod 4 gradually moves towards the inside of the injection cylinder 1. The piston plate 6 connected to it also moves in the injection cylinder 1, squeezing the liquid out of the injection cylinder 1 through the connecting pipe 3 and the injection head 7. Because of the threaded connection between the drive ring 2 and the spiral push rod 4, when the rotation of the spiral push rod 4 stops, the piston plate 6 will not move in the opposite direction under hydraulic pressure, reducing the possibility of liquid backflow during injection. The sealing ring 10 improves the sealing between the edge of the piston plate 6 and the inner wall of the injection cylinder 1, reducing the possibility of leakage during injection. The abutment plate limits the travel of the spiral push rod 4 and also avoids the possibility of collision between the handle 9 and the injection cylinder 1 during injection.

[0035] Reference Figure 1-3When the helical push rod 4 moves, the sliding sleeve 5 also undergoes relative displacement with the injection cylinder 1. Since the helical push rod 4 advances an equal distance with each rotation, the operator can accurately measure the amount of liquid injected by adding the value displayed on the main scale line 103 and the secondary scale line 52 on the injection cylinder 1, which helps improve the accuracy of the injection volume. After the liquid is pushed, the sliding limit arc block 14 and the sliding block 13 move in the sliding groove 104. The limit teeth 15 on the limit arc block 14 mesh with the limit teeth 15 on the limit ring 12, thereby limiting the angle of the sliding sleeve 5 and the helical push rod 4, reducing the possibility that the helical push rod 4 will continue to rotate and push the liquid when impacted.

[0036] Reference Figure 2 and Figure 3 To meet different practical needs, different injection heads 7 are connected to the connecting tube 3 on the injection cylinder 1 via the mounting tube 16, thus expanding the applicability of the syringe.

[0037] The implementation principle of the medical polyether ether ketone syringe in Embodiment 1 of this application is as follows: When injecting liquid into the injection cylinder 1, the piston plate 6 moves within the injection cylinder 1 by rotating the handle 9 to turn the spiral push rod 4 in one direction, squeezing the liquid out of the injection cylinder 1. When the rotation of the spiral push rod 4 stops, the piston plate 6 will not move in the reverse direction under hydraulic pressure, reducing the possibility of liquid backflow during the injection process.

[0038] Operators can accurately measure the amount of liquid injected by adding the value displayed on the main scale line 103 and the secondary scale line 52 on the injection cylinder 1, which helps to improve the accuracy of the injection volume. After the liquid is pushed, the sliding limit arc block 14 is engaged with the limit teeth 15 on the limit arc block 14 and the limit teeth 15 on the limit ring 12, thereby limiting the angle of the sliding sleeve 5 and the spiral push rod 4.

[0039] Example 2 Reference Figure 4 The outer ring wall of the drive ring 2 is provided with an external thread, and the inner wall of the opening end of the injection cylinder 1 is provided with an internal thread corresponding to the external thread of the drive ring 2. The injection cylinder 1 is threadedly connected to the external thread of the drive ring 2 through the internal thread.

[0040] The implementation principle of a medical polyether ether ketone syringe in Embodiment 2 of this application is as follows: the drive ring 2 is threadedly connected to the injection cylinder 1, which reduces the possibility of the drive ring 2 separating from the injection cylinder 1 during the injection process.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A medical polyetheretherketone syringe, characterized in that: The device includes an injection cylinder (1), a spiral push rod (4), a drive ring (2), and a piston plate (6). One end of the injection cylinder (1) is open, and the other end has an injection port (101). The piston plate (6) is slidably disposed in the injection cylinder (1). The side of the piston plate (6) is fitted against the inner ring wall of the injection cylinder (1). The drive ring (2) is connected to the open end of the injection cylinder (1). The inner ring wall of the drive ring (2) is provided with an internal thread. The drive ring (2) is threadedly connected to the spiral push rod (4) through the internal thread. One end of the spiral push rod (4) extends into the injection cylinder (1) and is rotatably connected to the piston plate (6).

2. The medical polyetheretherketone syringe according to claim 1, characterized in that: The piston plate (6) has a mounting ring groove (61) circumferentially formed on its side. A sealing ring (10) is embedded in the mounting ring groove (61) and is fitted to the inner ring wall of the injection cylinder (1).

3. A medical polyetheretherketone syringe according to claim 1, characterized in that: The spiral push rod (4) is connected to a rotating handle (9) at one end outside the injection cylinder (1), and the surface of the rotating handle (9) is provided with anti-slip texture (91).

4. A medical polyetheretherketone syringe according to claim 3, characterized in that: An abutment ring (11) is sleeved on the spiral push rod (4) and is located outside the injection cylinder (1).

5. A medical polyetheretherketone syringe according to claim 4, characterized in that: The outer sliding sleeve (5) of the injection cylinder (1) is provided with a sliding sleeve (5), one end of the sliding sleeve (5) is connected to the side of the abutment ring (11) near the injection cylinder (1), and a main scale line (103) is provided on the injection cylinder (1) along its length direction.

6. A medical polyetheretherketone syringe according to claim 5, characterized in that: The injection cylinder (1) has a contact cone surface (51) arranged circumferentially on the outer ring wall at the end away from the abutment ring (11), and a secondary scale line (52) is arranged circumferentially on the contact cone surface (51).

7. A medical polyetheretherketone syringe according to claim 6, characterized in that: A limiting toothed ring (12) is fitted on the sliding sleeve (5), and a limiting arc block (14) is provided on the outer ring wall of the injection cylinder (1). The limiting arc block (14) can slide along the length direction of the injection cylinder (1). Limiting teeth (15) are provided on the side of the limiting arc block (14) and the limiting toothed ring (12) that are close to each other.

8. A medical polyetheretherketone syringe according to claim 1, characterized in that: The injection cylinder (1) is connected to a connecting pipe (3) that communicates with the injection port (101). An installation pipe (16) is detachably connected to the connecting pipe (3). An injection head (7) is connected to one end of the installation pipe (16) away from the injection cylinder (1).

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