A syringe holder

Abstract

This utility model discloses a syringe fixing device, including a circular base, a bracket, a hollow cylinder, and a syringe clamping assembly. The bracket is fixed to the circular base, and a hollow cylinder is fixedly mounted on the top of the bracket. The syringe clamping assembly is slidably mounted inside the hollow cylinder. Through the cooperation of the hollow cylinder at the top of the bracket and the two clamping components, not only can the testing requirements of syringes of different specifications be met, but the syringe can also be better fixed, preventing the syringe barrel from slipping or tilting due to squeezing force, thus ensuring the accuracy of test data. This device can be used with a universal testing machine to test the syringe's liquid pushing force, body sealing, and piston sliding properties. It is simple to operate and has wide laboratory applications.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a syringe fixing device. Background Technology

[0002] In the field of medical device research and development and quality control, accurate testing of properties such as syringe liquid ejection force and syringe body seal is crucial. Currently, universal testing machines are widely used to simulate the axial pressure experienced by syringes during actual use, due to their precise load and displacement control, to test these properties. Compared to purchasing expensive dedicated syringe testing equipment, utilizing existing universal testing machines with suitable fixing devices is undoubtedly an effective way to reduce laboratory equipment investment costs and improve resource utilization efficiency.

[0003] However, achieving stable and reliable syringe fixation on a universal testing machine presents significant challenges. During axial pressure testing, improper design of the syringe clamp or holder, or inadequate sample holder fixation that fails to fully secure the syringe to the sample, can lead to slippage, deflection, or tilting of the syringe due to the compressive force. This unstable clamping state makes it difficult to precisely align the syringe's force axis with the force axis of the testing machine's indenter. The direct consequence is the introduction of additional bending stress or eccentric loads, severely interfering with the accuracy of the test data and failing to accurately reflect the syringe's pushing force or sealing performance. Furthermore, syringes come in various sizes with significant differences in length, barrel diameter, and flange structure. Universal clamps often struggle to effectively accommodate syringes of different sizes, resulting in clamping difficulties, inaccurate positioning, and requiring cumbersome adjustments or even clamp replacements each time a size is changed, greatly reducing testing efficiency. Utility Model Content

[0004] This utility model relates to a syringe fixing device that can be used with a universal testing machine. It has high adaptability to syringes of different specifications and can stably fix the syringe to improve the accuracy of test results.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a syringe fixing device, comprising a circular base, a bracket, a hollow cylinder, and a syringe clamping assembly, wherein the bracket is fixed on the circular base, the top of the bracket is fixedly provided with a hollow cylinder, and the syringe clamping assembly is slidably provided inside the hollow cylinder; The syringe clamping assembly includes two sets of clamping members slidably disposed on a hollow cylinder. Each set of clamping members includes a first sliding rod, a second sliding rod, a clamp, and a knob. The top end of the clamp is fixedly connected to the first sliding rod, one end of the second sliding rod is fixedly connected to the middle of the clamp, and the other end of the second sliding rod is connected to the knob. The top end of the clamp abuts against the lug of the syringe barrel.

[0006] Preferably, a hollow groove is formed at the center of the hollow cylinder, and the diameter of the hollow groove is larger than the diameter of the clamp.

[0007] Preferably, the hollow cylinder has two sets of first and second built-in grooves of different lengths symmetrically formed inside. The first and second built-in grooves are arranged opposite each other in the horizontal direction. The second built-in groove is located below the first built-in groove, and the inner wall of the second built-in groove has internal threads.

[0008] Preferably, the second built-in groove penetrates both the inner and outer walls of the hollow cylinder, and the length of the second built-in groove is greater than the length of the first built-in groove.

[0009] Preferably, a first sliding rod is slidably connected within the first built-in groove, and a second sliding rod is threadedly connected within the inner wall of the second built-in groove.

[0010] Preferably, the length of the first built-in groove is equal to the length of the first sliding rod, and the length of the second built-in groove is less than the length of the second sliding rod.

[0011] Preferably, the clamp includes clamping rings and clamping rods, with clamping rings fixed at both ends of the clamping rods.

[0012] Preferably, the clamping ring is a semi-circular clamping ring.

[0013] Preferably, the support includes at least three vertically arranged support rods.

[0014] Preferably, a receiving device is placed at the center of the circular base.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) Through the cooperation of the hollow cylinder at the top of the bracket and the two clamping parts, it can not only meet the testing requirements of syringes of different lengths and diameters, but also better fix the syringes, avoid the problem of the syringe barrel sliding and tilting due to the squeezing force, and ensure the accuracy of the test data.

[0016] The first sliding rod is connected to the top of the clamp, supports the syringe handle, and provides upward support through the first built-in groove to prevent the syringe from sliding down when compressed. All of these factors help to increase the stability of the syringe during the compression process.

[0017] The second sliding rod engages with the threaded inner groove of the second internal groove. When the knob is rotated, the second sliding rod moves horizontally along the direction of the second internal groove, causing the first sliding rod and the clamp to move closer or further apart, so as to clamp or release syringes of different specifications.

[0018] (2) The syringe fixing device of this utility model can be used with a universal testing machine, which can replace expensive professional testing equipment and effectively reduce laboratory research and development costs. When used with a universal testing machine, the device can be used to test the performance of syringe liquid pushing force, body sealing and piston sliding, etc. It is simple to operate and has a wide range of laboratory applications. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0021] Figure 1 This is a schematic diagram of the syringe fixing device of this utility model; Figure 2 This is a schematic diagram of the syringe clamping assembly of the syringe fixing device of this utility model; Figure 3 This is a cross-sectional view of the hollow cylinder of the syringe fixing device of this utility model in the vertical direction; The components are: 1. Circular base; 2. Support; 3. Hollow cylinder; 4. Knob; 5. First internal groove; 6. First sliding rod; 7. Second internal groove; 8. Second sliding rod; 9. Clamp; 10. Hollow groove; 11. Receiving device; 12. Injector; 13. Clamping ring; 14. Clamping rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1 and Figure 2 As shown, a syringe fixing device includes a circular base 1, a bracket 2, a hollow cylinder 3, and a syringe clamping assembly. The bracket 2 is fixed on the circular base 1, and the hollow cylinder 3 is fixedly provided on the top of the bracket 2. The syringe clamping assembly is slidably provided inside the hollow cylinder 3. The syringe clamping assembly includes two sets of clamping members slidably disposed on the hollow cylinder 3. Each set of clamping members includes a first sliding rod 6, a second sliding rod 8, a clamp 9, and a knob 4. The top end of the clamp 9 is fixedly connected to the first sliding rod 6, one end of the second sliding rod 8 is fixedly connected to the middle part of the clamp 9, and the other end of the second sliding rod 8 is connected to the knob 4. The top end of the clamp 9 abuts against the lug of the syringe 12.

[0024] Stable support is provided by the circular base 1 and the bracket 2. The hollow cylinder 3 at the top of the bracket 2 and the cooperation of the two sets of clamping parts can not only meet the testing requirements of syringes of different specifications, but also achieve better fixation of the syringes. The first sliding rod 6 of the two sets of clamping parts is connected to the top position of the clamp 9, which can be used to support the ear handle of the syringe.

[0025] like Figure 2 and Figure 3 As shown, a hollow groove 10 is formed in the center of the hollow cylinder 3. The diameter of the hollow groove 10 is larger than the diameter of the clamp 9, ensuring that the syringe 12 can pass smoothly through the hollow groove 10 and be clamped by the clamp 9. At the same time, the clamp 9 moves within the hollow groove 10. like Figure 1 and Figure 3 As shown, two sets of first internal grooves 5 and second internal grooves 7 of different lengths are symmetrically opened inside the hollow cylinder 3. The first internal grooves 5 and second internal grooves 7 are arranged opposite each other in the horizontal direction. The second internal groove 7 is located below the first internal groove 5. The inner wall of the second internal groove 7 has internal threads. The second internal groove 7 penetrates the inner wall and outer wall of the hollow cylinder 3. The length of the second internal groove 7 is greater than the length of the first internal groove 5. A first sliding rod 6 is slidably connected inside the first internal groove 5. A second sliding rod 8 is slidably connected inside the inner wall of the second internal groove 7. The length of the first internal groove 5 is equal to the length of the first sliding rod 6. The length of the second internal groove 7 is less than the length of the second sliding rod 8.

[0026] The first sliding rod 6 slides into the first built-in groove 5, providing guidance for the horizontal movement of the clamp 9. During the syringe compression process, the connection between the first sliding rod 6 and the top of the clamp 9 supports the lug of the syringe 12, and the first built-in groove 5 provides upward support to the first sliding rod 6, preventing the syringe from sliding down under pressure and increasing the stability of the syringe during compression. The second sliding rod 8 is threaded into the second built-in groove 7. Rotating the knob 4 drives the second sliding rod 8 to move horizontally, causing the first sliding rod 6 and the clamp 9 to move closer or further apart, thereby clamping or releasing syringes of different sizes.

[0027] like Figure 2 As shown, the clamp 9 includes a clamping ring 13 and a clamping rod 14. The clamping ring 13 is fixed at both ends of the clamping rod 14. The semi-circular clamping ring 13 fits against the cylindrical body of the syringe, improving the clamping stability.

[0028] like Figure 1 As shown, the bracket 2 includes at least three vertically arranged support rods to form a triangular support, preventing the device from shaking during testing.

[0029] like Figure 1 As shown, a receiving device 11 is placed at the center of the circular base 1 to receive the contents squeezed out of the syringe during the extrusion force test, preventing it from contaminating the surrounding test environment.

[0030] Working principle: The syringe 12 to be tested is passed through the hollow groove 10 of the hollow cylinder 3, so that the syringe handle abuts against the connection between the first sliding rod 6 and the top of the clamp 9, ensuring that the syringe body is completely inserted into the hollow groove 10. Rotate the knobs 4 at both ends of the hollow cylinder 3 to drive the second sliding rod 8 to move horizontally along the second internal groove 7. The second sliding rod 8 drives the clamp 9 and the first sliding rod 6 to move closer to the center until the clamp 9 tightly clamps the syringe 12. During the adjustment process, the first sliding rod 6 slides in the first internal groove 5 to provide guidance and support, ensuring that the clamp 9 moves horizontally without deviation.

[0031] The entire syringe fixing device is placed on the stage of the universal testing machine, and the fixed base is used to prevent movement. The testing machine is started, and the pressure head applies pressure to the syringe piston rod to conduct a pushing force test. During the test, the connection between the first sliding rod 6 and the top of the clamp 9 can support the lug of the syringe 12, and the first built-in groove 5 can provide an upward support force to the first sliding rod 6, increasing the stability of the syringe during the compression process. At the same time, the receiving device 11 receives the liquid medicine squeezed out from the syringe, avoiding environmental pollution.

[0032] After the test, rotate knob 4 in the opposite direction to release clamp 9, remove syringe, clean the liquid in receiving device 11, wipe off any residue on the device surface, and prepare for the next test.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A syringe fixing device, characterized in that, The device includes a circular base, a bracket, a hollow cylinder, and a syringe clamping assembly. The bracket is fixed to the circular base, and a hollow cylinder is fixed to the top of the bracket. The syringe clamping assembly is slidably disposed inside the hollow cylinder. The syringe clamping assembly includes two sets of clamping members slidably disposed on a hollow cylinder. Each set of clamping members includes a first sliding rod, a second sliding rod, a clamp, and a knob. The top end of the clamp is fixedly connected to the first sliding rod, one end of the second sliding rod is fixedly connected to the middle of the clamp, and the other end of the second sliding rod is connected to the knob. The top end of the clamp abuts against the lug of the syringe barrel.

2. The syringe fixing device as described in claim 1, characterized in that, A hollow groove is formed at the center of the hollow cylinder, and the diameter of the hollow groove is larger than the diameter of the clamp.

3. The syringe fixing device as described in claim 1, characterized in that, The hollow cylinder has two sets of first and second internal grooves of different lengths symmetrically arranged inside. The first and second internal grooves are arranged opposite each other in the horizontal direction. The second internal groove is located below the first internal groove and has internal threads on its inner wall.

4. The syringe fixing device as described in claim 3, characterized in that, The second built-in groove penetrates the inner and outer walls of the hollow cylinder, and the length of the second built-in groove is greater than the length of the first built-in groove.

5. A syringe fixing device as described in claim 3, characterized in that, The first built-in groove is slidably connected to a first sliding rod, and the second built-in groove is threadedly connected to a second sliding rod.

6. A syringe fixing device as described in claim 5, characterized in that, The length of the first built-in groove is equal to the length of the first sliding rod, and the length of the second built-in groove is less than the length of the second sliding rod.

7. A syringe fixing device as described in claim 1, characterized in that, The clamp includes clamping rings and clamping rods, with clamping rings fixed at both ends of the clamping rods.

8. A syringe fixing device as described in claim 7, characterized in that, The clamping ring is a semi-circular clamping ring.

9. A syringe fixing device as described in claim 1, characterized in that, The support structure includes at least three vertically arranged support rods.

10. A syringe fixing device as described in claim 1, characterized in that, A receiving device is placed at the center of the circular base.

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