Jig for detecting extrusion force of pre-filled syringe

Abstract

The utility model relates to the technical field of syringe extrusion force detection equipment, in particular to a pre-filled syringe extrusion force detection jig, which comprises a jig main body used for fixing and supporting a syringe and arranged on a tension tester to realize that a test end of the tension tester is matched with the top end of the syringe to carry out an extrusion force test; the first fixing assembly is used for fixing and limiting the common injector so as to be matched with the tensile testing machine to carry out extrusion force testing; the second fixing assembly is used for fixing and limiting the injector with the booster so as to be matched with the tension testing machine to carry out extrusion force testing; and the first fixing assembly or the second fixing assembly is detachably mounted on the jig main body and keeps the injector in a vertical state after being mounted, so that the technical problems that in the prior art, prefilled injectors are generally poor in detection precision, complex in operation and poor in repeatability are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of syringe extrusion force testing equipment, and in particular to a pre-filled syringe extrusion force testing fixture. Background Technology

[0002] The descriptions in this section are provided only as background information relating to this disclosure and do not constitute prior art.

[0003] Pre-filled syringes are syringes pre-filled with and sealed with drugs, vaccines, or other liquid medications. They are typically made of medical-grade glass or polymer materials, possessing good chemical stability and biocompatibility. Combining the functions of drug packaging and drug delivery, they are crucial for precision medicine and patient safety. The extrusion force of the syringe is a key indicator of its effectiveness and safety. Excessive extrusion force leads to time-consuming and laborious extrusion, affecting injection efficiency; insufficient extrusion force makes it difficult to control injection speed and volume, easily resulting in over-injection. Traditional methods for testing syringe extrusion force mainly rely on manual operation or simple mechanical devices, which suffer from low accuracy, complex operation, poor repeatability, and a lack of standardization.

[0004] Existing technology discloses a clamping device and testing system for a syringe injection force testing system, as disclosed in utility model patent CN220187995U. This patent includes a base, a fixed bracket, and a sliding support plate. The base is horizontally positioned, the fixed bracket is vertically mounted on the base, and the sliding support plate is vertically slidable on the fixed bracket and located above the base. A through-hole, extending along the thickness direction of the sliding support plate, is located in the middle of the sliding support plate. The syringe is fitted vertically into the through-hole. A bubble level is also provided on the side of the sliding support plate away from the base. This clamping device is simple in structure, easy to use, and can stably clamp the syringe for testing. It can also adjust the syringe height according to different needs. However, related technologies, including the above-mentioned technical solution, still have many problems, such as: when using a tensile testing machine for pressure testing, the sliding support plate used to fix the syringe is prone to downward displacement under force, leading to deviations in the accuracy of the test data; the syringe lacks a fixed clamping design, and the tensile testing machine can easily cause the syringe to tilt when pressing down, affecting the test accuracy. Utility Model Content

[0005] The purpose of this utility model is to provide a pre-filled syringe extrusion force testing fixture to solve the technical problems of poor testing accuracy, complex operation and poor repeatability that are common in pre-filled syringes in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pre-filled syringe extrusion force testing fixture includes:

[0008] The fixture body is used to fix and support the syringe and install it on the tensile testing machine so that the test end of the tensile testing machine and the top of the syringe can cooperate to perform extrusion force testing;

[0009] The first fixing component is used to fix and limit the ordinary syringe so as to cooperate with the tensile testing machine to perform extrusion force testing;

[0010] The second fixing component is used to fix and limit the syringe with the booster to cooperate with the tensile testing machine for extrusion force testing;

[0011] Both the first and second fixing components can be detachably installed on the fixture body and keep the syringe in a vertical position after installation.

[0012] Furthermore, the main body of the fixture is configured as a U-shaped structure, with several sets of slots on the opposite sides of both sides. These slots are used for the insertion and installation of the insert plates of the first or second fixing component. The slots are configured as non-through slots, with through holes at the bottom. These through holes are used for the tensioning component to pass through and connect with the insert plate to ensure that the insert plate and the slot are relatively fixed.

[0013] Furthermore, the slot is configured as a trapezoidal shape with a large entrance and a small bottom, and the cross-sectional shape of the insert plate is trapezoidal, and when the insert plate is inserted into the slot, the small end of the insert plate is not pressed tightly against the bottom end face of the slot.

[0014] Furthermore, the first fixing component includes a first insert plate for engaging with a slot. A first level platform is fixedly disposed on the upper surface of the first insert plate. The first level platform is used to balance the inclined upper surface of the first insert plate to ensure that the upper surface of the first level platform is parallel to the bottom surface of the fixture body. A through first fixing hole for inserting a syringe is provided on the first insert plate and the first level platform. The first fixing hole is configured as a stepped hole to support and limit the ear of the syringe. A first sliding pressure plate for pressing the ear of the syringe is installed on the first level platform.

[0015] Furthermore, there are two first sliding plates, and the first sliding plates are configured as U-shaped structures and slidably installed on the first water platform. At least one first sliding groove is provided on the first water platform. The first sliding groove is configured as an inverted T-shaped structure. A first tightening screw is installed on the first water platform. After the end of the first tightening screw passes through the first water platform, a nut is installed. The nut is slidably installed in the first sliding groove.

[0016] Furthermore, the second fixing component includes a second insert plate for engaging with a slot. A second water platform is fixedly mounted on the upper surface of the second insert plate. The second water platform is used to balance the inclined upper surface of the second insert plate to ensure that the upper surface of the second water platform is parallel to the bottom plate of the fixture body. A second fixing hole is provided through the second insert plate and the second water platform for inserting a syringe with a booster. The second fixing hole is configured as a central circular hole with clearance grooves at both ends to match the shape of the syringe with a booster. A second sliding pressure plate is installed on the second water platform to press the booster ears at both ends of the syringe with a booster.

[0017] Furthermore, there are two second sliding plates, and the second sliding plates are configured as U-shaped structures that slide on the second water platform. At least one second sliding groove is provided on the second water platform. The second sliding groove is configured as an inverted T-shaped structure, and both U-shaped ends of the second sliding plate are configured as T-shaped structures that match the shape of the second sliding groove.

[0018] Furthermore, the opposite sides of both the first and second sliding plates are configured with a concave arc shape to match the cylindrical syringe barrel of the syringe.

[0019] Furthermore, a baffle is provided on one side of the bottom center of the fixture body. This baffle, together with the two side plates of the fixture body, forms a space that limits and blocks the recycling container.

[0020] Furthermore, the tensioning component employs a tensioning screw, which passes through a through hole and is threaded onto the insert plate.

[0021] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0022] (1). By setting a U-shaped fixture body and inserting plate, this utility model can effectively ensure the pressure-bearing stability of the entire fixture. At the same time, by setting a first fixing component and a second fixing component, it can perform extrusion pressure tests on different types of syringes, making it more widely applicable. By setting the insertion fit between the inserting plate and the slot and limiting the trapezoidal shape of the slot, it is beneficial to ensure the stability after the inserting plate and the slot are inserted, thereby improving the accuracy of the extrusion pressure test data.

[0023] (2). By setting the specific structure of the first fixing component and the second fixing component, the present invention fixes the syringe to be tested by means of the first sliding plate and the second sliding plate, thereby preventing the syringe from shifting due to insecure fixing during testing and affecting the accuracy of the test data; by setting the recycling container, it is convenient to recycle the contents squeezed out of the syringe, preventing environmental pollution while recycling and reusing, saving energy consumption. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the fixture.

[0028] Figure 5 This is a three-dimensional structural diagram of the first fixing component;

[0029] Figure 6 This is a three-dimensional structural diagram of the second fixing component.

[0030] In the diagram: 100, jig body; 101, tensioning screw; 102, slot; 1021, through hole; 103, baffle; 200, first fixing component; 201, first insert plate; 202, first platform; 2021, first slide groove; 2022, first fixing hole; 203, first sliding pressure plate; 2031, first tightening screw; 2032, first handle; 300, second fixing component; 301, second insert plate; 302, second platform; 3021, second slide groove; 3022, second fixing hole; 303, second sliding pressure plate; 3031, second handle; 400, recycling container. Detailed Implementation

[0031] 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.

[0032] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0033] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] To address the limitations of existing technologies, this embodiment provides a technical solution. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0038] This utility model primarily addresses the problems of immature methods and defects in the syringe fixing structure in existing technologies, leading to poor detection accuracy. The specific solution is as follows:

[0039] See appendix Figure 1-4A pre-filled syringe extrusion force testing fixture includes: a fixture body 100 for fixing and supporting the syringe and mounting it on a tensile testing machine to achieve extrusion force testing through the cooperation of the testing end of the tensile testing machine and the tip of the syringe. It is understood that the tensile testing machine is a conventional pressure testing device, and each power end of the tensile testing machine is equipped with a pressure sensor for real-time monitoring of the pressure when the power end contacts the product under test. This technology is mature and therefore will not be described in detail here; a first fixing component 200 for fixing and limiting a standard syringe to cooperate with the tensile testing machine for extrusion force testing; and a second fixing component 300 for fixing and limiting a syringe with a booster to cooperate with the tensile testing machine for extrusion force testing. Both the first fixing component 200 and the second fixing component 300 can be detachably installed on the fixture body 100 and maintain the syringe in a vertical position after installation. It is understood that the first fixing component 200 and the second fixing component 300 can be selectively installed, and the selection criterion is based on the product type, which mainly includes standard syringes and syringes with boosters. See appendix. Figure 4 The fixture body 100 is configured with a U-shaped structure, and several sets of slots 102 are provided on the opposite sides of both sides, preferably three sets of slots 102. The purpose of providing several sets of slots 102 is to accommodate syringes of different lengths, because when testing syringes, it is necessary to ensure that the height of the syringe nozzle from the recovery container 400 is not too high or too low. If it is too high, splashing is likely to occur, and if it is too low, it is not conducive to observing the extrusion state of the contents. The slot 102 is used for the insertion plate of the first fixing component 200 or the second fixing component 300 to be inserted and installed. The slot 102 is configured as a non-through slot, and a through hole 1021 is provided at the bottom of the slot 102. The through hole 1021 is used for the tensioning component to pass through and connect with the insertion plate to ensure that the insertion plate is relatively fixed to the slot 102. The tensioning component is a tensioning screw 101, which passes through the through hole 1021 and is threadedly installed with the insertion plate. The slot 102 is designed as a trapezoid with a larger inlet and a smaller bottom. The insert plate has a trapezoidal cross-section, and when inserted into the slot 102, the smaller end of the insert plate is not tightly pressed against the bottom end face of the slot 102. The purpose of this design is to minimize displacement of the insert plate during testing due to the gap between the insert plate and the slot 102 by using a beaded contact and pressing mechanism. The tension screw 101 ensures full surface contact between the insert plate and the slot 102. A baffle 103 is provided on one side of the bottom center of the fixture body 100. The baffle 103, together with the two side plates of the fixture body 100, forms a space that limits and blocks the recovery container 400. By setting up the recovery container 400, it is convenient to recover the contents extruded from the syringe, preventing environmental pollution while recycling and reusing the contents, thus saving energy consumption.

[0040] See appendix Figure 5The first fixing component 200 includes a first insert plate 201 for insertion into a slot 102. A first leveling platform 202 is fixedly disposed on the upper surface of the first insert plate 201. The first leveling platform 202 is used to balance the inclined upper surface of the first insert plate 201 to ensure that the upper surface of the first leveling platform 202 is parallel to the bottom surface of the fixture body 100. Here, "balanced" can be understood as the first leveling platform 202 being an irregularly shaped cuboid that matches the inclined surface of the first insert plate 201 to ensure that the upper surface of the first leveling platform 202 is horizontal for fixing the syringe. A first fixing hole 2022 for inserting the syringe is provided through the first insert plate 201 and the first leveling platform 202. The first fixing hole 2022 is a stepped hole for supporting and limiting the ear of the syringe. A first sliding pressure plate 203 for pressing the ear of the syringe is installed on the first leveling platform 202. Specifically, there are two first sliding plates 203, and each first sliding plate 203 is configured with a U-shaped structure and slidably mounted on the first water platform 202. This can be understood as the two first sliding plates 203 being located on opposite sides of the syringe. The two U-shaped sides of the first sliding plate 203 can be understood as being inverted and fastened to opposite sides of the first water platform 202. At least one first sliding groove 2021 is provided on the first water platform 202, and the first sliding groove 2021 is configured with an inverted T-shaped structure. A first tightening screw 2031 is installed on the first water platform 202. After the end of the nail 2031 passes through the first horizontal platform 202, a nut is installed. The nut is slidably installed in the first sliding groove 2021. This can be understood as the nut being slidably installed in the first sliding groove 2021 rather than rotating. When the syringe is inserted into the first fixing hole 2022, the first sliding pressure plates 203 on both sides are moved so that the first sliding pressure plates 203 are both above the ear of the syringe. Then the first tightening screw 2031 is rotated. At this time, the first tightening screw 2031 and the nut rotate relative to each other. The first tightening screw 2031 tightens the first sliding pressure plate 203 so that it presses against the ear of the syringe.

[0041] See appendix Figure 6The second fixing component 300 includes a second insert plate 301 for insertion into the slot 102. A second water platform 302 is fixedly disposed on the upper surface of the second insert plate 301. The second water platform 302 is used to balance the inclined upper surface of the second insert plate 301 to ensure that the upper surface of the second water platform 302 is parallel to the bottom plate of the fixture body 100. A second fixing hole 3022 for inserting a syringe with a booster is provided on the second insert plate 301 and the second water platform 302. The second fixing hole 3022 is configured as a central circular hole with clearance grooves at both ends to match the shape of the syringe with a booster. A second sliding pressure plate 303 is installed on the second water platform 302 to press the booster ears at both ends of the syringe with a booster. There are two second sliding plates 303, and each second sliding plate 303 is configured in a U-shape and slidably mounted on a second horizontal platform 302. At least one second sliding groove 3021 is provided on the second horizontal platform 302. The second sliding groove 3021 is configured in an inverted T-shape. Both U-shaped ends of the second sliding plate 303 are configured as T-shaped structures matching the shape of the second sliding groove 3021. This can be understood as the T-shaped structure at the bottom of the U-shape of the second sliding plate 303 slidably mounted within the second sliding groove 3021 to press and limit the ear of the syringe with the booster. The opposite sides of both the first sliding plate 203 and the second sliding plate 303 are configured in a concave arc shape to match the cylindrical syringe barrel. A first handle 2032 is provided on the first sliding plate 203, and a second handle 3031 is provided on the second sliding plate 303. A handle is also provided on the recovery container 400, all for ease of operation.

[0042] When using this invention to test the squeezing force of a syringe, the first fixing component 200 or the second fixing component 300 and the appropriate height of the slot 102 are selected according to the type of syringe. If a common syringe is being tested, the first fixing component 200 is selected. The first insert plate 201 is inserted into the slot 102, and then the tensioning screw 101 is tightened to fix the first insert plate 201 in place. The syringe is then inserted into the first fixing hole 2022, and the first sliding pressure plate 203 is moved to be positioned above the syringe ear. Then, the first tightening screw 203 is tightened. 1. Secure the syringe by pressing the first sliding plate 203 against the ear of the syringe. Then, start the tensile testing machine to press the top of the syringe and perform the test. If the syringe being tested has a booster, select the second fixing component 300, insert the second insert plate 301 into the slot 102, tighten the tension screw 101 to fix the second insert plate 301 in place, insert the syringe into the second fixing hole 3022, move the second sliding plate 303 above the booster ear to complete the fixing operation, and then start the tensile testing machine to press the top of the syringe and perform the test.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pre-filled syringe extrusion force detection jig, characterized by, The utility model relates to a kind of injection force test fixture, including: Jig body (100) is used to fixedly support syringe and is installed on tensile testing machine to realize the test end of tensile testing machine and the top end of syringe cooperate to carry out extrusion force test; First fixed component (200) is used to fix and limit ordinary syringe to cooperate with tensile testing machine to carry out extrusion force test; Second fixed component (300) is used to fix and limit the syringe with booster to cooperate with tensile testing machine to carry out extrusion force test; The first fixed component (200) or second fixed component (300) can be detachably installed on jig body (100) and keep syringe vertical after installation.

2. A pre-filled syringe extrusion force detection fixture according to claim 1, wherein The jig body (100) is arranged as U-shaped structure, and the opposite surfaces of the two sides are provided with a plurality of groups of insertion slots (102), which are used for inserting and cooperating with the insertion plates of the first fixed component (200) or the second fixed component (300). The insertion slot (102) is arranged as a non-through slot, and the bottom of the insertion slot (102) is provided with a through hole (1021) for penetrating the tensioning component and connecting with the insertion plate to ensure the relative fixation of the insertion plate and the insertion slot (102).

3. The pre-filled syringe extrusion force detection fixture of claim 2, wherein, The insertion slot (102) is arranged as a trapezoidal shape with a large inlet and a small bottom, and the cross section of the insertion plate is trapezoidal, and when the insertion plate is inserted into the insertion slot (102), the small end of the insertion plate is not tightly pressed against the bottom end surface of the insertion slot (102).

4. The pre-filled syringe extrusion force detection fixture of claim 3, wherein, The first fixed component (200) includes a first insertion plate (201) for insertion and cooperation with the insertion slot (102). The upper surface of the first insertion plate (201) is fixedly provided with a first water platform (202), which is used to balance the inclined upper surface of the first insertion plate (201) to ensure that the upper surface of the first water platform (202) is parallel to the bottom surface of the jig body (100). The first insertion plate (201) and the first water platform (202) are provided with a first fixing hole (2022) for inserting the syringe, which is arranged as a stepped hole for supporting and limiting the ear part of the syringe. The first water platform (202) is installed with a first sliding pressure plate (203) for pressing the ear part of the syringe.

5. A pre-filled syringe extrusion force detection fixture according to claim 4, wherein The number of first sliding pressure plates (203) is two, and the first sliding pressure plates (203) are arranged as U-shaped structure and slidably installed on the first water platform (202). The first water platform (202) is provided with at least one first sliding groove (2021), and the first sliding groove (2021) is arranged as inverted T-shaped structure. The first water platform (202) is installed with a first tightening screw (2031), and the end of the first tightening screw (2031) penetrates through the first water platform (202) and is installed with a nut, which is slidably installed in the first sliding groove (2021).

6. A pre-filled syringe extrusion force detection fixture according to claim 3, wherein The second fixed assembly (300) comprises a second plugboard (301) for plug-in cooperation with the slot (102), and a second water platform (302) is fixedly arranged on the upper surface of the second plugboard (301) and used for balancing the inclined upper surface of the second plugboard (301) to ensure that the upper surface of the second water platform (302) is parallel to the bottom plate of the jig body (100), and a second fixed hole (3022) for inserting a syringe with a booster is arranged on the second plugboard (301) and the second water platform (302) and penetrates through, the second fixed hole (3022) is arranged as a middle circular hole and two end avoiding grooves for matching the shape of the syringe with the booster, and a second sliding pressure plate (303) for pressing the booster ear parts at both ends of the syringe with the booster is mounted on the second water platform (302).

7. A pre-filled syringe extrusion force detection fixture according to claim 6, wherein The number of the second sliding pressure plate (303) is two, and the second sliding pressure plate (303) is arranged as a U-shaped structure and is slidingly mounted on the second water platform (302), at least one second sliding groove (3021) is arranged on the second water platform (302), the second sliding groove (3021) is arranged as an inverted T-shaped structure, and the two U-shaped ends of the second sliding pressure plate (303) are arranged as T-shaped structures matched with the shape of the second sliding groove (3021).

8. The pre-filled syringe force detection fixture of claim 5, wherein, The opposite side of the first sliding pressure plate (203) is arranged as a concave arc shape for matching the cylindrical injection barrel of the syringe.

9. The pre-filled syringe extrusion force detection fixture of claim 6, wherein, The opposite side of the second sliding pressure plate (303) is arranged as a concave arc shape for matching the cylindrical injection barrel of the syringe.

10. A pre-filled syringe force detection fixture according to claim 2, wherein The tensioning component adopts a tensioning screw (101), which is screwed after penetrating through the through hole (1021), and the jig body (100) is provided with a baffle (103) on one side of the central bottom, and the baffle (103) and the two side plates of the jig body (100) jointly enclose a space for limiting and blocking the recovery container (400).

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