Syringe axial constant retainer

Abstract

The utility model discloses an axial constant retainer for an injector, which comprises a first base, a second base and a third base, the first base is provided with an accommodating cavity, and the accommodating cavity is provided with an opening; the diameters of the axial positioning grooves formed in the second bases are different, the axial positioning grooves penetrate through the second bases in the length direction of the second bases, the axial positioning grooves in the different second bases are matched with syringes with the corresponding diameters, the second bases are detachably connected into the containing cavity, first vertical grooves are formed in one sides of the second bases, and second vertical grooves are formed in the other sides of the second bases. A cover plate and a connecting rod mechanism are hinged to the second base, and the cover plate can turn over relative to the second base. Therefore, the accuracy of the syringes during axial constancy can be accurately guaranteed, the structure is simple, when different syringes are replaced, and mounting and dismounting are conducted, many parts are not needed, time and labor are saved, the operation difficulty is lowered, meanwhile, improper operation in the mounting and dismounting process is reduced, and the positioning accuracy of the syringes is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of automated syringe dispensing technology, and in particular to a syringe axial constant retainer. Background Technology

[0002] In medical, laboratory and other fields, syringe axis constant retainers are a common device used to stably hold syringes during operation and ensure that their axis remains constant after clamping.

[0003] Existing syringe clamping and holding devices often use elastic clips to hold syringes of different diameters. While this design can accommodate syringes of varying diameters, it has significant shortcomings in maintaining a constant syringe axis during practical use. Due to the elasticity and deformation characteristics of the clips, the syringe often fails to maintain absolute stability of its axis after clamping, resulting in some deviation. This affects injection accuracy and makes it unsuitable for high-precision operation scenarios.

[0004] Furthermore, some advanced clamping constant retainers employ more complex structures to ensure the syringe's axis remains constant. These retainers, through precise mechanical components and adjustment mechanisms, effectively maintain the stability of the syringe's axis after clamping. However, while this design improves syringe stability, it also introduces new problems. Due to the complexity of the structure, replacing different retainers requires the involvement of numerous parts during installation and disassembly, which is not only time-consuming and labor-intensive but also increases the difficulty of operation. In addition, improper operation during installation and disassembly can adversely affect the syringe's positioning accuracy. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, one objective of this utility model is to provide a syringe axial constant retainer that can accurately ensure the precision of the syringe when the axial direction is constant. It has a simple structure and does not require many parts to be involved in the installation and disassembly when changing different syringes. This not only saves time and effort but also reduces the difficulty of operation and reduces improper operation during installation and disassembly, thus ensuring the positioning accuracy of the syringe.

[0007] To achieve the above objectives, this utility model proposes a syringe axial constant retainer, comprising: a first base having a receiving cavity with an opening; multiple second bases, each having an axial positioning groove of different diameters, the axial positioning grooves extending along the length of the second base, and the axial positioning grooves on different second bases being adapted to syringes of corresponding diameters; the second bases being detachably connected to the receiving cavity; a first vertical groove on one side of each second base; and a cover plate and a linkage mechanism hinged to each second base. The cover plate can be flipped relative to the second base to cover and abut against the outer peripheral wall of the syringe, and a first notch is provided on the side of the cover plate facing the linkage mechanism; the linkage mechanism includes a hinge rod and an eccentric wheel, one end of the hinge rod is hinged in the first vertical groove, the other end of the hinge rod is rotatably connected to the eccentric wheel, and the end of the hinge rod near the eccentric wheel can be flipped relative to the first vertical groove to the first notch, for flipping the eccentric wheel onto the cover plate, and the eccentric wheel can rotate relative to the hinge rod, for pressing and fixing the cover plate onto the syringe or releasing the pressing and fixing of the cover plate onto the syringe.

[0008] In addition, the syringe axial constant retainer proposed in the above application may also have the following additional technical features:

[0009] Specifically, the cover plate is provided with a first arc-shaped groove on the side near the eccentric wheel, and the first arc-shaped groove transitions arc-shaped from the cover plate toward the eccentric wheel. When the cover plate is fixed, the eccentric wheel abuts against the first arc-shaped groove.

[0010] Specifically, the receiving cavity includes a rectangular cavity and a trapezoidal cavity, the rectangular cavity and the trapezoidal cavity are connected, and the trapezoidal cavity expands toward the side away from the rectangular cavity. The second base includes a rectangular block and a trapezoidal block, and the rectangular block and the trapezoidal block are integrally formed. The shape of the trapezoidal block is adapted to the rectangular cavity and the rectangular block and the trapezoidal cavity. In a non-fixed state, the second base can slide axially relative to the receiving cavity so that the inclined surface of the trapezoidal block fits against the inclined surface of the trapezoidal cavity.

[0011] Specifically, a limiting block is provided at the end of the rectangular block away from the trapezoidal block, and a limiting hole is provided on the side of the rectangular cavity away from the trapezoidal cavity. The limiting block is adapted to the limiting hole. When the inclined surface of the trapezoidal block is attached to the inclined surface of the trapezoidal cavity, the limiting block is inserted into the limiting hole. When the end of the trapezoidal block away from the rectangular block is attached to the inner wall of the trapezoidal cavity, the limiting block is disengaged from the limiting hole.

[0012] Specifically, it also includes two threaded fasteners. The second base has two stepped holes, and the threaded fasteners pass through the stepped holes. The threaded fasteners and the stepped holes are clearance-fitted, and the two threaded fasteners are symmetrically distributed on both sides of the syringe. The inner bottom wall of the rectangular cavity has two threaded holes. When the inclined surface of the trapezoidal block is attached to the inclined surface of the trapezoidal cavity, the threaded fasteners can be threaded into the threaded holes.

[0013] Specifically, the stepped hole includes a first through hole and a second through hole. The second through hole is arranged adjacent to the threaded hole and is connected to the first through hole. The diameter of the second through hole is larger than that of the first through hole. A wire retaining ring is provided on the screw of the threaded fastener, and the outer peripheral wall of the wire retaining ring is in contact with the inner peripheral wall of the second through hole.

[0014] Specifically, a second arc-shaped groove is provided on the surface of the cover plate near the first base when the cover plate is closed. The second arc-shaped groove is arranged coaxially with the axial positioning groove, and the second arc-shaped groove and the axial positioning groove form a circular limiting cavity adapted to the syringe.

[0015] Specifically, there may be multiple eccentric wheels, and the multiple eccentric wheels are arranged along the length direction of the second base.

[0016] Specifically, the second base has multiple second vertical grooves and a horizontal groove on the side adjacent to the first vertical groove, and both the second vertical grooves and the first vertical groove are connected to the horizontal groove. The cover plate has multiple second notches on the side facing the linkage mechanism, and the multiple second notches are respectively connected to the corresponding second vertical grooves. A vertical rod is provided in the second vertical groove, and a horizontal rod is provided in the horizontal groove. One end of the vertical rod is fixedly connected to the corresponding eccentric wheel, and the other end of the vertical rod is fixedly connected to the horizontal rod. One end of the horizontal rod extends out of the horizontal groove.

[0017] Specifically, the second base is also provided with a slot that matches the injection handle of the syringe, and the slot is connected to the axial positioning groove.

[0018] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0019] (1) By integrating the axial positioning groove, cover plate and linkage mechanism on the second base, an independent module is formed. There is no need to involve many parts during installation and disassembly, which not only saves time and effort, but also reduces the difficulty of operation. At the same time, it reduces improper operation during installation and disassembly, and ensures the positioning accuracy of the syringe.

[0020] (2) By equipping multiple second bases, each with a carefully designed axial positioning groove of different diameters, it can accommodate syringes of various sizes. This ensures that the appropriate second base can be selected for different syringes to achieve a stable fixation of its axis, thereby guaranteeing stability and accuracy during injection and making it suitable for high-precision operation scenarios.

[0021] (3) By setting up a connecting mechanism, the cap plate can be quickly squeezed and fixed. At the same time, by utilizing the unique eccentric structure of the eccentric wheel, as it rotates, the eccentric wheel will gradually apply pressure to the cap plate, thereby tightly squeezing and fixing the cap plate to the syringe. This process is not only easy to operate, but also enables rapid clamping of the syringe, greatly improving the efficiency of injection operations. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the syringe axial constant retainer according to an embodiment of the present invention in the syringe fixed state;

[0025] Figure 2 This is a schematic diagram of the structure of a syringe axial constant retainer according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the eccentric wheel in the locked state of the cover plate according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram showing the eccentric wheel not locked to the cover plate according to an embodiment of the present invention;

[0028] Figure 5 This is a partial structural schematic diagram of a syringe axial constant retainer according to an embodiment of the present invention;

[0029] Figure 6 This is a cross-sectional schematic diagram of a syringe axial constant retainer according to an embodiment of the present invention;

[0030] Figure 7This is a schematic diagram of a threaded fastener according to an embodiment of the present invention.

[0031] As shown in the figure:

[0032] 1. First base; 10. Receiving cavity; 11. Limiting hole; 12. Threaded hole;

[0033] 2. Second base; 20. Axial positioning groove; 21. First vertical groove; 22. Rectangular block; 23. Trapezoidal block; 24. Limiting block; 25. Stepped hole; 26. Second vertical groove; 27. Horizontal groove; 28. Slot; 250. First through hole; 251. Second through hole;

[0034] 3. Cover plate; 30. First notch; 31. First arc-shaped groove; 32. Second arc-shaped groove; 33. Second notch; 310. Limiting cavity;

[0035] 4. Linkage mechanism; 40. Hinge link; 41. Eccentric wheel; 42. Vertical link; 43. Horizontal link;

[0036] 5. Threaded fasteners; 51. Wire retaining rings. Detailed Implementation

[0037] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0039] The syringe axial constant retainer of this utility model embodiment will be described below with reference to the accompanying drawings.

[0040] like Figure 1 , Figure 2 As shown, the syringe axial constant retainer of this utility model embodiment may include a first base 1, a plurality of second bases 2 (only one is shown in the figure), a cover plate 3, and a linkage mechanism 4.

[0041] The first base 1 is provided with a receiving cavity 10, and the receiving cavity 10 is provided with an opening, which can be used to place and remove the second base 2.

[0042] It should be noted that the first base 1 can be set on the end of the injection arm of the injection robot.

[0043] Furthermore, such as Figure 1As shown, the receiving cavity 10 includes a rectangular cavity (not shown) and a trapezoidal cavity (not shown). The rectangular cavity and the trapezoidal cavity are connected, and the trapezoidal cavity expands towards the side away from the rectangular cavity. The second base 2 includes a rectangular block 22 and a trapezoidal block 23, and the rectangular block 22 and the trapezoidal block 23 are integrally formed. The trapezoidal block 23 and the trapezoidal cavity, as well as the rectangular block 22, are respectively adapted to the shape of the rectangular cavity. In the non-fixed state, the second base 2 can slide axially relative to the receiving cavity 10 so that the inclined surface of the trapezoidal block 23 fits against the inclined surface of the trapezoidal cavity.

[0044] The diameter of the axial positioning groove 20 opened on each second base 2 is different. The axial positioning groove 20 runs through the length of the second base 2, and the axial positioning groove 20 on different second bases 2 is adapted to the syringe of the corresponding diameter. The second base 2 is detachably connected to the receiving cavity 10. A first vertical groove 21 is opened on one side of the second base 2.

[0045] Furthermore, such as Figure 1 As shown, the second base 2 is also provided with a slot 28 that is adapted to the injection handle of the syringe, and the slot 28 is connected to the axial positioning groove 20. The slot 28 can limit the injection handle of the syringe, thereby providing a secondary limiting effect on the syringe, improving the axial stability of the rear end of the syringe, and further improving the axial stability when the syringe is axially fixed.

[0046] As one possible scenario, the slot 28 divides the axial positioning groove 20 into two sections along the width direction of the second base 2. The arc diameter of the axial positioning groove 20 on the side of the slot 28 away from the axial positioning groove 20 is larger than the arc diameter of the axial positioning groove 20 on the other side of the slot 28. This allows the circular pusher at the end of the syringe rod away from the syringe to avoid obstructing the syringe rod, thus facilitating the complete insertion of the syringe rod into the syringe barrel. It also makes it easier for relevant personnel to disassemble and install the syringe.

[0047] The second base 2 is hinged to a cover plate 3 and a linkage mechanism 4.

[0048] The cover plate 3 can be flipped relative to the second base 2 to cover and abut against the outer peripheral wall of the syringe. A first notch 30 is provided on the side of the cover plate 3 facing the linkage mechanism 4 to form a clearance space for the hinge rod 40 when it is flipped, so that the eccentric wheel 41 can be flipped to the top of the cover plate 3.

[0049] The linkage mechanism 4 includes a hinge rod 40 and an eccentric wheel 41. One end of the hinge rod 40 is hinged in the first vertical groove 21, and the other end of the hinge rod 40 is rotatably connected to the eccentric wheel 41. The end of the hinge rod 40 near the eccentric wheel 41 can be flipped relative to the first vertical groove 21 to the first notch 30 for flipping the eccentric wheel 41 onto the cover plate 3. The hinge rod 40 is T-shaped and consists of a vertical block and a connecting rod. The vertical block is hinged in the first vertical groove 21, and the eccentric wheel 41 can be rotatably connected to the connecting rod through a bearing.

[0050] The eccentric wheel 41 is rotatable relative to the hinge rod 40, used to press and fix the cover plate 3 onto the syringe or release the pressure of the cover plate 3 onto the syringe. By using the eccentric wheel 41, the magnitude and direction of the clamping force applied to the cover plate 3 can be adjusted by changing the eccentricity or rotation angle of the eccentric wheel 41. When the eccentric wheel 41 contacts the cover plate 3 and applies pressure, the cover plate 3 is gradually pressed and fixed onto the syringe due to the eccentricity. As the eccentric wheel 41 continues to rotate, this clamping force gradually increases until the desired fixing effect is achieved, for example, referring to… Figure 3 The cover plate 3 can be pressed and fixed by rotating the eccentric wheel 41, while referring to... Figure 4 By rotating the eccentric wheel 41, a gap can be created between the eccentric wheel 41 and the cover plate 3, thereby releasing the pressure and fixation on the cover plate 3. Then, by flipping the hinge rod 40, the eccentric wheel 41 can be moved away from the cover plate 3, releasing the flipping restriction on the cover plate 3.

[0051] Specifically, this invention cleverly integrates the axial positioning groove 20, the cover plate 3, and the linkage mechanism 4 onto the second base 2, forming an independent module. Installation and disassembly require fewer parts, saving time and effort, reducing operational difficulty, and minimizing the risk of improper operation during installation and disassembly, thus ensuring the positioning accuracy of the syringe. More flexibly, by equipping multiple second bases 2, each with a carefully designed axial positioning groove 20 of different diameters, it can accommodate syringes of various sizes. This ensures that a suitable second base 2 can be selected for different syringes to achieve stable fixation of their axis, thereby guaranteeing stability and accuracy during injection, making it suitable for high-precision operation scenarios.

[0052] In actual operation, the user simply needs to place the selected second base 2 securely in the receiving cavity 10 and fix it in the second base 2. Then, the syringe is precisely placed in the axial positioning groove 20, and the cover plate 3 is placed on the syringe. Then, by rotating the hinge rod 40, the end of the hinge rod 40 near the eccentric wheel 41 is flipped to the first notch 30, at which point the eccentric wheel 41 is flipped onto the cover plate 3.

[0053] Finally, the user simply rotates the eccentric wheel 41. Utilizing its unique eccentric structure, as the rotation progresses, the eccentric wheel 41 gradually applies pressure to the cover plate 3, thereby tightly squeezing and fixing it to the syringe. This process is not only simple to operate but also enables rapid clamping of the syringe, greatly improving the efficiency of injection operations.

[0054] Furthermore, such as Figure 3 and Figure 4 As shown, a first arc-shaped groove 31 is provided on the side of the cover plate 3 near the eccentric wheel 41, and the first arc-shaped groove 31 transitions arc-shaped from the cover plate 3 toward the eccentric wheel 41. When the cover plate 3 is fixed, the eccentric wheel 41 abuts against the first arc-shaped groove 31.

[0055] In the above-mentioned scheme, the arc transition design of the first arc groove 31 matches the shape of the eccentric wheel 41, increasing the contact area between the two. This allows the eccentric wheel 41 to smoothly conform to the first arc groove 31 during rotation, reducing the possibility of slippage or displacement. Furthermore, the curved surface contact between the first arc groove 31 and the eccentric wheel 41 reduces the possibility of point contact or line contact, reducing wear during long-term use and extending the service life of the cover plate 3 and the eccentric wheel 41. At the same time, the arc transition design makes the eccentric wheel 41 rotate more smoothly, reducing jamming or resistance, making operation more effortless and providing a better user experience.

[0056] In one embodiment of this utility model, such as Figure 1 and Figure 5 As shown, a limiting block 24 is provided at the end of the rectangular block 22 away from the trapezoidal block 23, and a limiting hole 11 is provided on the side of the rectangular cavity away from the trapezoidal cavity. The limiting block 24 is adapted to the limiting hole 11. When the inclined surface of the trapezoidal block 23 is attached to the inclined surface of the trapezoidal cavity, the limiting block 24 is inserted into the limiting hole 11. When the end of the trapezoidal block 23 away from the rectangular block 22 is attached to the inner wall of the trapezoidal cavity, the limiting block 24 is disengaged from the limiting hole 11.

[0057] It should be noted that the length of the second base 2 is less than the length of the receiving cavity 10, providing the second base 2 with room to move within the receiving cavity 10, so that the second base 2 can move relative to the receiving cavity 10, making it easier to adjust the position of the limiting block 24 relative to the limiting hole 11, making the whole operation more convenient and efficient.

[0058] In the above scheme, the limiting block 24 is inserted into the limiting hole 11 to play a secondary limiting role for the second base 2, which further improves the stability of the limiting block 24. At the same time, the design of the limiting block 24 and the limiting hole 11 to match each other allows the trapezoidal block 23 to be accurately positioned to the predetermined position during the movement, ensuring that the trapezoidal block 23 can be fixed when it is in the correct position, avoiding installation errors caused by misoperation, and making the second base 2 more convenient and efficient to assemble.

[0059] In one embodiment of this utility model, such as Figure 6 As shown, the axial constant retainer of this syringe may also include two threaded fasteners 5. Two stepped holes 25 are provided on the second base 2. The threaded fasteners 5 pass through the stepped holes 25 and are clearance-fitted with the stepped holes 25. The two threaded fasteners 5 are symmetrically distributed on both sides of the syringe. Two threaded holes 12 are provided on the inner bottom wall of the rectangular cavity. When the inclined surface of the trapezoidal block 23 is attached to the inclined surface of the trapezoidal cavity, the threaded fasteners 5 can be threadedly connected in the threaded holes 12. The threaded fasteners 5 may be bolts, screws or other components with threaded parts.

[0060] Specifically, personnel can easily detach the threaded fastener 5 from the threaded hole 12 by simply rotating the threaded fastener 5 and controlling its movement away from the threaded hole 12, thereby releasing the fixing constraint on the second base 2. In this state, the operator can easily move the second base 2, allowing it to smoothly disengage from the receiving cavity 10, easily separating the second base 2 from the first base 1, which greatly facilitates the subsequent replacement of different second bases 2.

[0061] Once the adjusted second base 2 is ready, the operator simply needs to place it smoothly back into the receiving cavity 10 and slide it slightly to adjust its position. Once the inclined surface of the trapezoidal block 23 perfectly aligns with the inclined surface of the trapezoidal cavity, it indicates that the bottom end of the threaded fastener 5 is precisely aligned with the threaded hole 12. At this point, simply rotating the threaded fastener 5 again quickly establishes a secure threaded connection between it and the threaded hole 12, thus firmly fixing the second base 2 onto the first base 1. The entire process is simple and smooth, requiring no cumbersome steps, greatly improving work efficiency and user experience.

[0062] In one embodiment of this utility model, such as Figure 6 and Figure 7 As shown, the stepped hole 25 includes a first through hole 250 and a second through hole 251. The second through hole 251 is arranged adjacent to the threaded hole 12 and is connected to the first through hole 250. The diameter of the second through hole 251 is larger than that of the first through hole 250. A wire retaining ring 51 is provided on the screw of the threaded fastener 5, and the outer peripheral wall of the wire retaining ring 51 is in contact with the inner peripheral wall of the second through hole 251.

[0063] It should be noted that the wire retaining ring 51 is composed of one or more high-strength, elastic wire rings. These wire rings are arranged and connected in a specific way to form one or more ring-shaped structures, such as circular rings. This structure gives the wire retaining ring 51 good elasticity and recovery ability, enabling it to deform when subjected to external force and quickly return to its original shape after the external force is removed.

[0064] In the above scheme, the elasticity of the wire retaining ring 51 can be used to achieve the fit between the outer peripheral wall of the wire retaining ring 51 and the inner peripheral wall of the second through hole 251. This allows the threaded fastener 5 to be limited in axial movement when it is not subjected to external force (manual rotation of the threaded fastener 5), thus preventing the threaded fastener 5 from coming off. It also ensures that the threaded fastener 5 does not come off the stepped hole 25 before it is installed with the threaded hole 12, thereby facilitating the hole alignment between the stepped hole 25 and the threaded hole 12 before assembly. At the same time, when the threaded fastener 5 is rotated and comes off the threaded hole 12 by external force, the elasticity of the wire retaining ring 51 will not affect the axial movement of the threaded fastener 5.

[0065] In one embodiment of this utility model, such as Figure 5 As shown, a second arc-shaped groove 32 is provided on the surface of the cover plate 3 near the first base 1 when the cover plate 3 is closed. The second arc-shaped groove 32 is arranged coaxially with the axial positioning groove 20, and the second arc-shaped groove 32 and the axial positioning groove 20 form a circular limiting cavity 310 adapted to the syringe.

[0066] In the above design, the second arc-shaped groove 32 improves the fit with the outer wall of the syringe, enhances the fit between the cover plate 3 and the syringe, and increases the contact area between the cover plate 3 and the outer wall of the syringe, thereby improving the stability of the syringe when fixed. Furthermore, the second arc-shaped groove 32, combined with the axial positioning groove 20, forms a circular limiting cavity 310 that perfectly matches the shape of the syringe. This design ensures that the syringe can be securely positioned, effectively preventing shaking or misalignment during operation and improving the axial stability of the syringe in the fixed state.

[0067] Furthermore, the coaxial arrangement of the second arc-shaped groove 32 and the axial positioning groove 20 not only simplifies the assembly process but also significantly improves the assembly accuracy. This precise layout is particularly important for medical devices that require high-precision positioning, ensuring the axial stability and reliability of the syringe after installation.

[0068] In one embodiment of this utility model, such as Figure 5 As shown, there can be multiple eccentric wheels 41, and the multiple eccentric wheels 41 are arranged along the length direction of the second base 2. The number of eccentric wheels 41 can be 2, 3, 4, etc., and the number and length of the eccentric wheels 41 can be set according to the length of the cover plate 3.

[0069] In the above scheme, by increasing the number of eccentric wheels 41, the contact area with the cover plate 3 can be significantly increased. This increased contact area helps to distribute the fixing force more evenly, reducing swaying or instability caused by excessive force at a single point, thereby improving the overall stability when fixing the cover plate 3. Furthermore, the coordinated action of multiple eccentric wheels 41 can form a more robust fixing structure. When the cover plate 3 is subjected to external forces, the multiple eccentric wheels 41 can share these forces, reducing the load on a single eccentric wheel 41, thus lowering the risk of damage and enhancing the overall fixing effect.

[0070] In one embodiment of this utility model, such as Figure 5 As shown, the second base 2 has multiple second vertical grooves 26 and a horizontal groove 27 on the side near the first vertical groove 21, and the second vertical grooves 26 and the first vertical groove 21 are connected to the horizontal groove 27. The cover plate 3 has multiple second notches 33 on the side facing the linkage mechanism, and the multiple second notches 33 are connected to the corresponding second vertical grooves 26. A vertical rod 42 is provided in the second vertical groove 26, and a horizontal rod 43 is provided in the horizontal groove 27. One end of the vertical rod 42 is fixedly connected to the corresponding eccentric wheel 41, and the other end of the vertical rod 42 is fixedly connected to the horizontal rod 43. One end of the horizontal rod 43 extends out of the horizontal groove 27.

[0071] In the above scheme, the second vertical groove 26 and horizontal groove 27 can provide a buffer for the vertical rod 42 and the horizontal rod 43, expand the rotatable angle of the vertical rod 42 and the horizontal rod 43, and also indirectly expand the rotatable angle of the eccentric wheel 41, so as to improve the firmness and stability of clamping the cover plate 3.

[0072] One end of the crossbar 43 extends out of the horizontal groove 27, which allows relevant personnel to easily pull the crossbar 43 to rotate out the vertical bar 42.

[0073] In summary, the syringe axial constant retainer of this utility model can accurately ensure the precision of the syringe when the axial direction is constant. It has a simple structure and does not require many parts when installing or disassembling different syringes. It not only saves time and effort, but also reduces the difficulty of operation. At the same time, it reduces improper operation during installation and disassembly, and ensures the positioning accuracy of the syringe.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0075] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement 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 described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An axial constant holder for a syringe, characterized in that, The utility model provides a kind of injection device, including: First base, the first base is provided with containing cavity, and the containing cavity is provided with opening; Multiple second base, the axial positioning slot of each second base is different in diameter, the axial positioning slot is along the length direction of the second base and is penetrated, and the axial positioning slot on different second base is matched with corresponding diameter size syringe, the second base is detachably connected in the containing cavity, one side of the second base is provided with first vertical slot, the second base is hinged with cover and connecting rod mechanism, wherein, The cover can be turned over relative to the second base, to cover and resist on the outer circumferential wall of syringe, and the side of the cover towards the connecting rod mechanism is provided with first notch; The connecting rod mechanism includes hinged rod and eccentric wheel, one end of the hinged rod is hinged in the first vertical slot, the other end of the hinged rod is rotatably connected with the eccentric wheel, and the end of the hinged rod adjacent to the eccentric wheel can be turned over to the first notch relative to the first vertical slot, for turning over the eccentric wheel to the cover, the eccentric wheel can be rotated relative to the hinged rod, for extruding and fixing the cover on the syringe or releasing the extruding and fixing of the cover on the syringe.

2. The axial constant holder for syringes according to claim 1, characterized in that, The side of the cover close to the eccentric wheel is provided with first arc slot, and the first arc slot is arc-shaped over from the direction of the cover towards the eccentric wheel, and the eccentric wheel is in contact with the first arc slot in the fixed state of the cover.

3. The axial constant holder for syringes according to claim 1, characterized in that, The containing cavity includes rectangular cavity and trapezoidal cavity, the rectangular cavity is communicated with the trapezoidal cavity, and the trapezoidal cavity is enlarged towards the side away from the rectangular cavity, the second base includes rectangular block and trapezoidal block, and the rectangular block is integrally formed with the trapezoidal block, the trapezoidal block is matched with the trapezoidal cavity and the rectangular block is matched with the rectangular cavity, and the second base can slide axially relative to the containing cavity in the unfixed state, so that the inclined surface of the trapezoidal block is fitted to the inclined surface of the trapezoidal cavity.

4. The axial constant holder for syringes according to claim 3, characterized in that, The end of the rectangular block away from the trapezoidal block is provided with a limiting block, the side of the rectangular cavity away from the trapezoidal cavity is provided with a limiting hole, and the limiting block is matched with the limiting hole, when the inclined surface of the trapezoidal block is fitted to the inclined surface of the trapezoidal cavity, the limiting block is inserted into the limiting hole, and when the end of the trapezoidal block away from the rectangular block is fitted to the inner wall of the trapezoidal cavity, the limiting block is separated from the limiting hole.

5. The axial constant holder for syringes according to claim 3, characterized in that, It also includes two threaded fasteners, two stepped holes are formed in the second base, the threaded fasteners are arranged in the stepped holes, the threaded fasteners are gap-fitted with the stepped holes, and the two threaded fasteners are symmetrically distributed on both sides of the syringe, two threaded holes are formed in the inner bottom wall of the rectangular cavity, and when the inclined surface of the trapezoidal block is fitted to the inclined surface of the trapezoidal cavity, the threaded fasteners can be threadedly connected in the threaded holes.

6. The axial constant holder for syringes according to claim 5, characterized in that, The stepped hole comprises a first through hole and a second through hole, the second through hole is arranged adjacent to the threaded hole, the second through hole is communicated with the first through hole, the second through hole has a larger diameter than the first through hole, a steel wire retainer is arranged on the screw rod of the threaded fastener, and the outer peripheral wall of the steel wire retainer is fitted with the inner peripheral wall of the second through hole.

7. The axial constant holder for syringes according to claim 1, characterized in that, A second arc-shaped groove is arranged on the surface of the first base adjacent to the cover plate in the closed state, the second arc-shaped groove is coaxially arranged with the axial positioning groove, and the second arc-shaped groove and the axial positioning groove form a circular limiting cavity matched with the syringe.

8. The axial constant holder for syringes according to claim 1, characterized in that, The eccentric wheels can be multiple, and the multiple eccentric wheels are arranged along the length direction of the second base.

9. The axial constant holder for syringes according to claim 8, characterized in that, A plurality of second vertical grooves and a horizontal groove are arranged on one side of the second base adjacent to the first vertical groove, the second vertical grooves and the first vertical groove are communicated with the horizontal groove, a plurality of second notches are arranged on one side of the cover plate facing the connecting rod mechanism, the plurality of second notches are respectively communicated with the corresponding second vertical grooves, a vertical rod is arranged in the second vertical groove, a horizontal rod is arranged in the horizontal groove, one end of the vertical rod is fixedly connected with the corresponding eccentric wheel, the other end of the vertical rod is fixedly connected with the horizontal rod, and one end of the horizontal rod extends out of the horizontal groove.

10. The axial constant holder for syringes according to claim 1, characterized in that, A clamping groove matched with the injection handle of the syringe is further arranged on the second base, and the clamping groove is communicated with the axial positioning groove.

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