A syringe abutment, a syringe securing mechanism and a pen injector

Abstract

The application discloses an injector abutting piece, an injector fixing mechanism and an injection pen, and relates to the technical field of medical devices. The injector abutting piece is arranged in a shell of the injection pen, and a pre-filled injector is arranged in the shell. The injector abutting piece comprises a mounting body, an abutting body and an elastic structure. The mounting body is connected with the shell. The abutting body is connected with the mounting body through the elastic structure. An annular abutting surface is formed on a side of the abutting body facing the pre-filled injector. The elastic structure is arranged in an axial direction of the injector abutting piece. A first shaft end of the elastic structure is connected with a side of the abutting body away from the pre-filled injector. A second shaft end of the elastic structure is connected with a side of the mounting body facing the abutting body. The injector abutting piece effectively avoids the risk of damaging the glass material injector due to over-tightening, and ensures the stability of the injector during the injection process.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a syringe abutment, a syringe fixing mechanism, and an injection pen. Background Technology

[0002] In the field of medical injection, the injection pen, as a convenient drug delivery device, is widely used in the injection therapy of various drugs. By combining a pre-filled syringe with the injection pen, it achieves the function of single-dose, single-use, greatly improving the convenience and safety of injection.

[0003] Current injection pen designs face a technical challenge in securing the pre-filled syringe: while the glass material of the pre-filled syringe ensures drug stability and safety, it is also fragile. Existing syringe securing mechanisms require a syringe abutment to press firmly against the syringe to ensure stability during injection. However, this method puts excessive pressure on the glass syringe, increasing the risk of breakage. Furthermore, due to the small diameter of the needle tip, existing abutment methods are prone to needle bending. Utility Model Content

[0004] The purpose of this application is to provide a syringe abutment that effectively avoids the risk of damage to glass syringes due to excessive tightening, while ensuring the stability of the syringe during injection. Another purpose of this application is to provide a syringe fixing mechanism and an injection pen.

[0005] To achieve the above objectives, this application provides a syringe abutment, comprising: Mounting element for connection to the housing of the injection pen; The abutment body is connected to the mounting body through an elastic structure. The side of the abutment body facing the pre-filled syringe forms an annular abutment surface, which is hollow in the center and closed around the circumference. The elastic structure extends axially from the syringe abutment, with its first axial end connected to the side of the abutment facing away from the pre-filled syringe, and its second axial end connected to the side of the mounting body facing the abutment.

[0006] In some embodiments, the elastic structure includes one or more elastic units; when there are multiple elastic units, the multiple elastic units are arranged circumferentially or axially along the syringe abutment; when arranged axially, the multiple elastic units are connected in sequence.

[0007] In some embodiments, the elastic structure includes a plurality of elastic elements, which are evenly spaced along the circumference of the syringe abutment.

[0008] In some embodiments, the elastic structure includes an elastic unit; the elastic unit has a pair of elastic edges, the two ends of the elastic edges serving as a first axial end and a second axial end of the elastic structure, the pair of elastic edges enclosing a deformation cavity, the size of the deformation cavity changing with the deformation of the pair of elastic edges.

[0009] In some embodiments, the elastic edge includes a first straight edge and a second straight edge, the first end of the first straight edge serves as the first axial end of the elastic structure, the second end of the second straight edge serves as the second axial end of the elastic structure, and the second end of the first straight edge is connected to the first end of the second straight edge.

[0010] In some embodiments, the angle between the first straight side and the second straight side is an acute angle, a right angle, or an obtuse angle.

[0011] In some embodiments, the pair of elastic edges are mirror-symmetric about the plane of the central axis passing through the syringe abutment.

[0012] In some embodiments, the lengths of the first straight side and the second straight side are equal, and the pair of elastic sides together form a rhombus.

[0013] In some embodiments, the elastic edge includes a first edge and a second edge, the first end of the first edge serves as the first axial end of the elastic structure, the second end of the second edge serves as the second axial end of the elastic structure, the second end of the first edge is connected to the first end of the second edge, the first edge and the second edge are arc-shaped, and the first edge and the second edge are smoothly connected.

[0014] In some embodiments, the lengths of the first side and the second side are equal, and the pair of elastic sides together form an ellipse.

[0015] In some embodiments, the side of the annular abutment facing the pre-filled syringe is a plane or an arc surface.

[0016] In some embodiments, the mounting body, the elastic structure, and the abutment body are integrally formed.

[0017] In some embodiments, the elastic element is a rubber body.

[0018] In some embodiments, the mounting body is provided with a boss, which is used to engage with a slot on the housing.

[0019] In some embodiments, the mounting body has a protrusion, and the outer peripheral surface of the mounting body is used to slidably accommodate a release ring. The release ring has an opening groove and a slot, and the protrusion is used to cooperate with the opening groove or the slot.

[0020] This application also provides a syringe fixing mechanism, including any of the above-described syringe abutment members.

[0021] In some embodiments, the device further includes a retaining cylinder and a gasket disposed in the housing of the injection pen, wherein the retaining cylinder is disposed in the pre-filled syringe, and the gasket and the syringe abutment abut against the front and rear sides of the handle of the pre-filled syringe, respectively.

[0022] In some embodiments, the gasket is an elastic gasket.

[0023] This application also provides an injection pen, including any of the above-described syringe fixing mechanisms.

[0024] Compared to the aforementioned background technology, the syringe abutment provided in this application is disposed in the housing of an injection pen. The housing contains a pre-filled syringe. The syringe abutment mainly includes a mounting body, an abutment body, and an elastic structure. The mounting body is connected to the housing. The abutment body and the mounting body are connected by the elastic structure. The side of the abutment body facing the pre-filled syringe forms an annular abutment surface, which is centrally hollowed out and circumferentially closed. The elastic structure extends axially in the syringe abutment. The first axial end of the elastic structure is connected to the side of the abutment body opposite to the pre-filled syringe, and the second axial end of the elastic structure is connected to the side of the mounting body facing the abutment body.

[0025] During the use of an injection pen, the stability of the pre-filled syringe is crucial. On one hand, the syringe needs to be securely fixed in its housing to prevent displacement or movement during injection, thus ensuring injection accuracy and precise dosage control. On the other hand, since pre-filled syringes are typically made of glass, their fragility necessitates a gentle securing method to avoid damage.

[0026] The syringe abutment provided in this application is designed to solve this technical problem. The syringe abutment is disposed within the housing of an injection pen, which contains a pre-filled syringe. The syringe abutment mainly includes a mounting body, an abutment body, and an elastic structure. The mounting body is fixedly connected to the housing, ensuring the stability of the entire abutment within the housing. The abutment body and the mounting body are connected by the elastic structure, allowing the abutment body to move elastically within a certain range.

[0027] The elastic structure extends axially along the syringe abutment, with its first end connected to the side of the abutment facing away from the pre-filled syringe, and its second end connected to the side of the mounting body facing the abutment. This design allows the elastic structure to provide necessary elastic support along the axial direction of the syringe abutment, enabling appropriate adjustments based on the shape and size of the syringe when fixing the pre-filled syringe, thus preventing damage to the glass syringe due to excessive tightening.

[0028] Based on the above structural and process descriptions, it can be seen that the syringe abutment has at least the following beneficial effects: the syringe abutment effectively avoids the risk of damage to the glass syringe due to excessive tightness, while ensuring the stability of the syringe during the injection process. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 A cross-sectional schematic diagram of the syringe abutment, syringe fixing mechanism, and injection pen provided in the embodiments of this application; Figure 2 A perspective view of the syringe abutment provided in the embodiments of this application; Figure 3 for Figure 2 A magnified view of a portion of the elastic structure; Figure 4 A schematic diagram of the included angle between the first straight side and the second straight side provided for embodiments of this application; Figure 5 A schematic diagram of the syringe fixing mechanism provided in an embodiment of this application; Figure 6 A schematic diagram of the structure of the release ring provided in an embodiment of this utility model; Figure 7 This is a schematic diagram illustrating the structure of the release ring and syringe abutment provided in an embodiment of the present invention.

[0031] in: Syringe abutment 10, mounting body 101, boss 1011, protrusion 1012, abutment body 102, elastic structure 103, first shaft end 1031, second shaft end 1032, annular abutment surface 104, elastic unit 105, elastic edge 106, deformation cavity 107, first straight edge 108, second straight edge 109; Injection pen 20; Casing 30; Prefilled syringe 40, handle 401; Fixed cylinder 50; Gasket 60; Needle sheath 70; Needle sleeve spring 80; Release ring 90, opening groove 91, slot 92; 100 horns; Putter 110; Spring guide rod 120; Push rod spring 130; Pen cap 140. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the syringe abutment, syringe fixing mechanism, and injection pen provided in the embodiments of this application.

[0035] like Figure 1 As shown, this application provides a syringe abutment 10 suitable for an injection pen 20.

[0036] In addition to the syringe abutment 10, the injection pen 20 also includes a housing 30, a needle sheath 70, a pre-filled syringe 40, a needle sheath spring 80, a release ring 90, a syringe abutment 10, a sound tube 100, a push rod 110, a spring guide rod 120, a push rod spring 130, and a pen cap 140.

[0037] The pen cap 140 is located at the front end of the injection pen 20 and is fixed to the needle sheath 70 extending from the front end of the injection pen 20.

[0038] The housing 30 is provided with a needle sleeve 70, a needle sleeve spring 80 and a release ring 90. The rear end of the needle sleeve spring 80 is axially abutted against the inner rear end of the housing 30, the front end of the needle sleeve spring 80 is axially abutted against the blocking wall on the rear side of the release ring 90, and the front end of the release ring 90 is axially abutted against the rear end of the needle sleeve 70.

[0039] The release ring 90 is provided with a syringe abutment 10, the syringe abutment 10 is provided with a sound tube 100, the sound tube 100 is provided with a push rod 110, the push rod 110 is provided with a spring guide rod 120 and a push rod spring 130, the rear end of the spring guide rod 120 abuts against the inner side of the rear end of the sound tube 100, the push rod spring 130 is sleeved on the outer circumferential surface of the spring guide rod 120, and the front end of the push rod spring 130 axially abuts against the inner side of the front end of the push rod 110. The release ring 90 is used to control the syringe abutment 10 to axially lock the push rod 110, and the syringe abutment 10 is used to axially limit the sound tube 100.

[0040] During injection, when the needle sheath 70 pushes the release ring 90 to move towards the rear end of the injection pen 20 against the action of the needle sheath spring 80, the release ring 90 unlocks the syringe abutment 10, causing the syringe abutment 10 to unlock the plunger 110. The plunger 110 moves towards the front end of the injection pen 20 under the action of the plunger spring 130, pushing the rubber stopper of the pre-filled syringe 40. When the plunger 110 disengages from the sound tube 100, the sound tube 100 unlocks in the syringe abutment 10. Under the action of the plunger spring 130, the sound tube 100 moves towards the rear end of the injection pen 20, and makes a sound by contacting the inner rear end of the housing 30 to indicate that the injection is complete.

[0041] After injection, when the release ring 90 moves the needle sheath 70 toward the front end of the injection pen 20 under the action of the needle sheath spring 80, the needle sheath 70 surrounds the needle of the pre-filled syringe 40, the release ring 90 is locked by the sound tube 100, and the needle sheath 70 is locked by the release ring 90.

[0042] Please refer to Figures 2 to 4 ,in, Figure 2 This is a perspective view of the syringe abutment provided in an embodiment of this application. Figure 3 for Figure 2 Enlarged schematic diagram of a portion of the elastic structure. Figure 4 A schematic diagram showing the included angle between the first straight side and the second straight side, provided for an embodiment of this application.

[0043] In a first specific embodiment, the syringe abutment 10 provided in this application is disposed in the housing 30 of the injection pen 20. The housing 30 is provided with a pre-filled syringe 40. The syringe abutment 10 mainly includes a mounting body 101, an abutment body 102, and an elastic structure 103. The mounting body 101 is connected to the housing 30. The abutment body 102 is connected to the mounting body 101 through the elastic structure 103. The side of the abutment body 102 facing the pre-filled syringe 40 forms an annular abutment surface 104. The elastic structure 103 extends axially in the syringe abutment 10. The first axial end of the elastic structure 103 is connected to the side of the abutment body 102 facing away from the pre-filled syringe 40, and the second axial end of the elastic structure 103 is connected to the side of the mounting body 101 facing the abutment body 102.

[0044] During the use of the injection pen 20, the stability of the pre-filled syringe 40 is crucial. On the one hand, the syringe needs to be securely fixed in the housing 30 to ensure that it does not shift or shake during injection, thereby guaranteeing the accuracy of the injection and precise control of the drug dosage. On the other hand, since the pre-filled syringe 40 is usually made of glass, its fragility necessitates a sufficiently gentle fixing method to avoid damaging the syringe.

[0045] The syringe abutment 10 provided in this application is designed to solve the aforementioned technical problems. The syringe abutment 10 is disposed within the housing 30 of the injection pen 20, and the housing 30 contains a pre-filled syringe 40. The syringe abutment 10 mainly includes a mounting body 101, an abutment body 102, and an elastic structure 103. The mounting body 101 is fixedly connected to the housing 30, ensuring the stability of the entire syringe abutment 10 within the housing 30. The abutment body 102 is connected to the mounting body 101 via the elastic structure 103, allowing the abutment body 102 to move elastically within a certain range. The annular abutment surface 104 is centrally hollow and circumferentially closed; this design ensures effective support for the syringe while avoiding excessive compression of the syringe. The annular abutment surface 104 has a certain degree of deformation. For example, after the syringe is installed, the syringe handle is not completely coaxial with the housing, or there is a manufacturing error in the syringe handle causing the handle surface to be non-horizontal. In this case, the annular abutment surface 104 of the abutment body 102 can deform to eliminate the axial or circumferential deformation of the syringe. The side of the annular abutment surface 104 facing the pre-filled syringe 40 can be a plane to achieve surface contact, which has the advantages of a large contact area, strong anti-tipping and anti-vibration capabilities, uniform stress distribution, and convenient installation. Alternatively, the side of the annular abutment surface 104 facing the pre-filled syringe 40 can also be an arc surface.

[0046] The elastic structure 103 extends axially along the syringe abutment 10, with its first axial end connected to the side of the abutment 102 facing away from the pre-filled syringe 40, and its second axial end connected to the side of the mounting body 101 facing the abutment 102. This structural design allows the elastic structure 103 to provide necessary elastic support axially along the syringe abutment 10, thereby enabling appropriate adjustments based on the shape and size of the syringe when fixing the pre-filled syringe 40. This avoids damage to the glass syringe due to excessive tightening, or bending of the plastic needle (such as COP) of the pre-filled syringe during injection.

[0047] Based on the above structural and process descriptions, it can be seen that the syringe abutment 10 has at least the following beneficial effects: the syringe abutment 10 effectively avoids the risk of damage to the syringe due to excessive tightness, while ensuring the stability of the syringe during the injection process.

[0048] In some embodiments, the elastic structure 103 includes one or more elastic units 105. When there are multiple elastic units 105, the multiple elastic units 105 are arranged along the circumference or axial direction of the syringe abutment 10. When the multiple elastic units 105 are distributed circumferentially, they are preferably evenly distributed circumferentially and spaced apart. When the multiple elastic units 105 are distributed axially, the multiple elastic units are connected sequentially in the axial direction. Multiple elastic units 105 can be distributed in both the circumferential and axial directions.

[0049] In this embodiment, the elastic structure 103 is designed with a flexible configuration of elastic units 105 to adapt to different usage needs and structural requirements. This design not only provides basic elastic support functions, but also enhances the adaptability and functionality of the syringe abutment 10 through the diversity of the number and layout of the elastic units 105.

[0050] The elastic structure 103 may include one elastic unit 105 or multiple elastic units 105. When multiple elastic units 105 are used, these elastic units 105 are spaced apart circumferentially along the syringe abutment 10. This arrangement allows the syringe abutment 10 to distribute the force more evenly when fixing the pre-filled syringe 40, thereby avoiding damage to the glass syringe due to excessive local pressure, or preventing the bending of plastic needles such as COP in the pre-filled syringe during injection. The uniform distribution of multiple elastic units 105 corresponds to the design of the annular abutment surface 104 of the abutment body 102, further ensuring the stability of the syringe during injection. This uniform force distribution design improves the reliability of the syringe abutment 10.

[0051] It should be noted that this embodiment does not limit the structure and material of the elastic unit 105. For example, the elastic unit 105 can be any elastic material, such as rubber; the elastic unit 105 can be a gasket structure.

[0052] In some embodiments, the elastic structure 103 includes an elastic unit 105; the elastic unit 105 is provided with a pair of elastic edges 106, the two ends of the elastic edges 106 serve as the first axial end and the second axial end of the elastic structure 103, and the pair of elastic edges 106 enclose to form a deformation cavity 107, the size of the deformation cavity 107 changing with the deformation of the pair of elastic edges 106.

[0053] In this embodiment, the composition of the elastic structure 103 is explicitly defined as including elastic unit 105. This design is intended to provide the necessary elasticity and cushioning effect for the syringe abutment 10 to ensure the stability and safety of the pre-filled syringe 40 during use.

[0054] The elastic unit 105 consists of a pair of elastic edges 106, with the two ends of these edges serving as the first and second shaft ends of the elastic structure 103, respectively. This structural design allows the elastic edges 106 to deform under pressure. When the elastic edges 106 deform, the size of the deformation cavity 107 formed by them changes accordingly. This change provides elasticity and cushioning to the syringe abutment 10, allowing for appropriate adjustments based on the shape and size of the syringe when fixing the pre-filled syringe 40, preventing damage to the syringe due to excessive tightness. Simultaneously, this elastic design also helps absorb potential vibrations or impacts during injection, further ensuring injection accuracy and precise drug dosage control.

[0055] In some embodiments, the elastic edge 106 includes a first straight edge 108 and a second straight edge 109. The first end of the first straight edge 108 serves as the first axial end of the elastic structure 103, and the second end of the second straight edge 109 serves as the second axial end of the elastic structure 103. The second end of the first straight edge 108 is connected to the first end of the second straight edge 109.

[0056] In this embodiment, the specific structure of the elastic edge 106 is further refined to achieve a more precise elastic effect and cushioning effect. The elastic edge 106 consists of a first straight edge 108 and a second straight edge 109, wherein the first end of the first straight edge 108 serves as the first shaft end of the elastic structure 103, and the second end of the second straight edge 109 serves as the second shaft end of the elastic structure 103. This design allows the first and second shaft ends to serve as connecting ends, enabling a stable connection with other parts of the syringe abutment 10.

[0057] A shock-absorbing buffer zone is formed between the first and second shaft ends. Within this zone, the first straight edge 108 and the second straight edge 109 can bend at the point where the second end of the first straight edge 108 connects to the first end of the second straight edge 109. This bending change allows the elastic edge 106 to undergo elastic deformation under external force, thereby producing a shock-absorbing and buffering effect. This design not only improves the stability and safety of the syringe abutment 10 when fixing the pre-filled syringe 40, but also effectively absorbs and disperses vibrations or impacts that may occur during injection, thus protecting the glass syringe from damage. Through this carefully designed elastic edge structure, the syringe abutment 10 can better adapt to pre-filled syringes of different sizes and shapes, while ensuring a smooth injection process.

[0058] It should be noted that this embodiment uses a straight edge instead of a curved edge. The advantage is that it can provide a stable supporting and fixing effect in a static state, and provide sufficient vibration reduction and buffering effect in a dynamic state.

[0059] In other embodiments besides this one, the elastic edge 106 may also take the form of other numbers of straight edges, or one or more curved edges, which should also fall within the scope of this application.

[0060] In some embodiments, the angle between the first straight side 108 and the second straight side 109 is an acute angle, a right angle, or an obtuse angle.

[0061] In this embodiment, the acute angle arrangement means that the first straight edge 108 and the second straight edge 109 are not arranged far apart (as opposed to the obtuse angle arrangement), but rather exist in a form that is close to each other. This design improves the performance of the syringe abutment 10 in several ways.

[0062] The acute angle arrangement allows the first straight edge 108 and the second straight edge 109 to be closer together in a static state, thereby improving the holding and fixing performance of the syringe abutment 10 on the pre-filled syringe 40. Furthermore, because the first straight edge 108 and the second straight edge 109 are appropriately close together, this design also reduces the axial dimension of the syringe abutment 10. A smaller axial dimension means that the space occupied by the syringe abutment 10 in the housing 30 is reduced, thus saving layout space. It should be noted that the aforementioned acute angle is only a preferred structural form; in specific products, right angles or even obtuse angles can be selected according to actual needs.

[0063] In some embodiments, a pair of elastic edges 106 are mirror-symmetric about the plane of the central axis passing through the syringe abutment 10.

[0064] In this embodiment, this mirror-symmetric design means that the pair of elastic edges 106 are completely symmetrical in the left-right direction. When the syringe abutment 10 is subjected to axial pressure, this symmetry ensures that the deformation of the pair of elastic edges 106 in the left-right direction can cancel each other out. Specifically, when one side of the elastic edge 106 is deformed by pressure, the other side of the elastic edge 106 will deform in the opposite way, thereby maintaining balance in the entire structure.

[0065] The advantage of this design is that, for the pair of elastic edges 106 as a whole, only axial deformation occurs outwards. This means that when the syringe abutment 10 is under pressure, it can effectively transmit force axially, while providing axial support, cushioning, and vibration damping. This axial force transmission and cushioning mechanism ensures the structural stability of the syringe abutment 10 when fixing the pre-filled syringe 40, and also protects the glass syringe from lateral forces, thus avoiding potential damage.

[0066] Furthermore, the mirror-symmetric design enhances the overall structural stability of the syringe abutment 10. Due to its left-right symmetry, the syringe abutment 10 can maintain balance when subjected to forces in various directions, reducing the risk of structural deformation or damage caused by asymmetrical forces. This symmetry not only improves the reliability and durability of the syringe abutment 10 but also ensures its performance stability during long-term use.

[0067] In some embodiments, the lengths of the first straight edge 108 and the second straight edge 109 are equal, and a pair of elastic edges 106 together form a rhombus.

[0068] In this embodiment, this design not only gives the elastic edge 106 unique structural characteristics in terms of geometry, but also brings significant advantages in terms of functionality.

[0069] Because the first straight edge 108 and the second straight edge 109 are of equal length, this equal-length design ensures that the deformation on both sides is symmetrical and uniform when the elastic edge 106 deforms. This symmetry is particularly important when the syringe abutment 10 is subjected to axial pressure, as it guarantees a uniform force distribution and avoids localized stress concentration caused by asymmetrical deformation. This uniform force distribution helps improve the stability and reliability of the syringe abutment 10 when fixing the pre-filled syringe 40.

[0070] Furthermore, the rhomboid structure formed by the pair of elastic edges 106 further enhances the functionality of the syringe abutment 10. The symmetry and geometric stability of the rhomboid structure allow the syringe abutment 10 to maintain good shape and performance under pressure. The four sides of the rhombus are of equal length, and the diagonals bisect each other perpendicularly. This structural characteristic allows the syringe abutment 10 to provide uniform support and cushioning in all directions. During injection, this uniform support and cushioning effectively reduces syringe vibration and wobbling, thereby improving injection accuracy and precise drug dosage control.

[0071] Meanwhile, the compactness and symmetry of the rhomboid structure also make the syringe abutment 10 more efficient in terms of space utilization. This structural design not only saves space but also improves the overall structural stability of the syringe abutment 10. Within the limited space of the injection pen 20, the elastic edge 106 of the rhomboid structure can better adapt to different installation positions and operating conditions, providing greater design flexibility and adaptability.

[0072] In some embodiments, the elastic edge 106 includes a first edge and a second edge. The first end of the first edge serves as the first axial end of the elastic structure 103, and the second end of the second edge serves as the second axial end of the elastic structure 103. The second end of the first edge is connected to the first end of the second edge. The first edge and the second edge are arc-shaped and smoothly connected. By adopting an arc-shaped and smooth transition structure, stress concentration can be reduced, thereby improving the structural strength of the elastic edge 106.

[0073] In some embodiments, the first side and the second side are of equal length, and the pair of elastic sides 106 together form an ellipse. The major axis of the ellipse can be in the axial direction or in the circumferential direction. Alternatively, the pair of elastic sides 106 can also form a circle. It should be noted that the above-described elliptical structure is only a preferred structural shape. In addition, other structural shapes can be selected according to actual needs.

[0074] In some embodiments, the mounting body 101, the elastic structure 103, and the abutment body 102 are integrally formed. The integral structure is beneficial for the installation of the syringe abutment and has better structural stability, thereby improving its service life.

[0075] In some embodiments, the mounting body 101 is provided with a boss 1011, which is used to engage with a slot on the housing 30 to achieve relative fixation between the mounting body 101 and the housing 30. Multiple bosses 1011 distributed circumferentially can be provided on the mounting body 101 to improve the stability of the engagement between the mounting body 101 and the housing 30.

[0076] In some embodiments, the mounting body 101 is provided with a protrusion 1012, and a release ring 90 is slidably fitted onto the outer peripheral surface of the mounting body 101. The release ring 90 is provided with an opening groove 91 and a slot 92, such as... Figure 6 As shown, the slot 92 is located on the side of the opening slot 91 opposite to the abutment body 102. The protrusion 1012 is used to mate with the opening slot 91 or the slot 92, such as... Figure 7 As shown, during assembly, the protrusion 1012 is located in the slot 92 to form a pre-assembly for use in the next process. After the pre-assembly is installed into the injection pen, the protrusion 1012 slides axially and engages in the opening slot 91, completing the initial use state of the injection pen.

[0077] Please refer to Figure 5 , Figure 5 This is a schematic diagram of the syringe fixing mechanism provided in an embodiment of this application.

[0078] This application also provides a syringe fixing mechanism, including the aforementioned syringe abutment 10.

[0079] The syringe fixing mechanism includes the aforementioned syringe abutment 10 and should have all the beneficial technical effects of the aforementioned syringe abutment 10, which will not be described in detail here.

[0080] In some embodiments, the device further includes a fixing cylinder 50 and a gasket 60 disposed in the housing 30 of the injection pen 20. The fixing cylinder 50 is installed in the pre-filled syringe 40, and the gasket 60 and the syringe abutment 10 abut against the front and rear sides of the handle 401 of the pre-filled syringe 40, respectively. The gasket 60 may be an elastic gasket, such as a rubber gasket.

[0081] In this embodiment, the housing 30 of the injection pen 20 is further provided with a fixing cylinder 50 and a gasket 60, which further enhances the fixing and protection mechanism of the pre-filled syringe 40. The fixing cylinder 50 is used to mount the pre-filled syringe 40, while the gasket 60 and the syringe abutment 10 are located on the front and rear sides of the handle 401 of the pre-filled syringe 40, respectively, and together provide abutment, cushioning and vibration reduction.

[0082] The gasket 60 is located on the front side of the handle 401 of the pre-filled syringe 40, while the syringe abutment 10 is located on the rear side of the handle 401 of the pre-filled syringe 40. This arrangement makes the position of the pre-filled syringe 40 within the housing 30 more stable and reliable. The synergistic effect of the gasket 60 and the syringe abutment 10 not only ensures the stability of the pre-filled syringe 40 during injection, but also effectively absorbs and disperses vibrations or impacts that may occur during injection, thereby protecting the glass syringe from damage.

[0083] The advantage of this design is that the gasket 60 and the syringe abutment 10 further enhance the stability of the pre-filled syringe 40 by providing a dual support and cushioning mechanism. The gasket 60 provides support on the front side, while the syringe abutment 10 provides elastic support and cushioning on the rear side. This dual protection mechanism not only improves the positional stability of the syringe within the housing 30 but also reduces the risk of syringe damage due to external forces or improper operation.

[0084] Furthermore, this design improves the accuracy of the injection process and the precise control of the drug dosage. By placing a pad 60 and a syringe abutment 10 on the front and rear sides of the handle 401 respectively, the pre-filled syringe 40 can maintain a more stable position during injection, thereby ensuring the accuracy of the injection and the precise control of the drug dosage. This dual protection mechanism not only improves the service life of the syringe but also enhances the overall reliability of the injection pen 20 and the user experience.

[0085] This application also provides an injection pen 20, including the aforementioned syringe fixing mechanism.

[0086] The injection pen 20 includes the aforementioned syringe fixing mechanism and should have all the beneficial technical effects of the aforementioned syringe fixing mechanism, which will not be elaborated here.

[0087] It should be noted that many of the components mentioned in this application are general standard parts or components known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0088] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0089] The syringe abutment, syringe fixing mechanism, and injection pen provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A syringe abutment, characterized in that, include: Mounting element for connection to the housing of the injection pen; The abutment body is connected to the mounting body through an elastic structure, and the side of the abutment body facing the pre-filled syringe forms an annular abutment surface; The elastic structure extends axially from the syringe abutment, with its first axial end connected to the side of the abutment facing away from the pre-filled syringe, and its second axial end connected to the side of the mounting body facing the abutment.

2. The syringe abutment as described in claim 1, characterized in that, The elastic structure includes one or more elastic units; when there are multiple elastic units, the multiple elastic units are arranged along the circumference or axial direction of the syringe abutment; when arranged along the axial direction, the multiple elastic units are connected in sequence.

3. The syringe abutment according to claim 1, characterized in that, The elastic structure includes multiple elastic units, which are evenly spaced along the circumference of the syringe abutment.

4. The syringe abutment according to claim 1, characterized in that, The elastic structure includes an elastic unit; the elastic unit has a pair of elastic edges, the two ends of the elastic edges serve as the first axial end and the second axial end of the elastic structure, the pair of elastic edges enclose a deformation cavity, and the size of the deformation cavity changes with the deformation of the pair of elastic edges.

5. The syringe abutment according to claim 4, characterized in that, The elastic edge includes a first straight edge and a second straight edge. The first end of the first straight edge serves as the first axial end of the elastic structure, and the second end of the second straight edge serves as the second axial end of the elastic structure. The second end of the first straight edge is connected to the first end of the second straight edge.

6. The syringe abutment according to claim 5, characterized in that, The angle between the first straight side and the second straight side is an acute angle, a right angle, or an obtuse angle.

7. The syringe abutment according to claim 6, characterized in that, The pair of elastic edges are mirror-symmetric about the plane of the central axis passing through the syringe abutment.

8. The syringe abutment according to claim 7, characterized in that, The lengths of the first straight side and the second straight side are equal, and the pair of elastic sides together form a rhombus.

9. The syringe abutment according to claim 4, characterized in that, The elastic edge includes a first edge and a second edge. The first end of the first edge serves as the first axial end of the elastic structure, and the second end of the second edge serves as the second axial end of the elastic structure. The second end of the first edge is connected to the first end of the second edge. The first edge and the second edge are arc-shaped and are smoothly connected.

10. The syringe abutment according to claim 9, characterized in that, The first side and the second side have the same length, and the pair of elastic sides together form an ellipse.

11. The syringe abutment according to claim 1, characterized in that, The side of the annular abutment facing the pre-filled syringe is either a plane or an arc.

12. The syringe abutment according to claim 2, characterized in that, The mounting body, the elastic structure, and the abutment body are integrally formed.

13. The syringe abutment according to claim 2, characterized in that, The elastic unit is a rubber body.

14. The syringe abutment according to any one of claims 1 to 13, characterized in that, The mounting body is provided with a boss, which is used to engage with a slot on the housing.

15. The syringe abutment according to any one of claims 1 to 13, characterized in that, The mounting body has a protrusion, and the outer peripheral surface of the mounting body is used to slidably fit a release ring. The release ring has an opening groove and a slot, and the protrusion is used to cooperate with the opening groove or the slot.

16. A syringe fixing mechanism, characterized in that, Includes the syringe abutment as described in any one of claims 1 to 15.

17. The syringe fixing mechanism according to claim 16, characterized in that, It also includes a retaining cylinder and a gasket disposed in the housing of the injection pen, wherein the pre-filled syringe is installed in the retaining cylinder, and the gasket and the syringe abutment are respectively abutted against the front and rear sides of the handle of the pre-filled syringe.

18. The syringe fixing mechanism according to claim 17, characterized in that, The gasket is an elastic gasket.

19. An injection pen, characterized in that, Includes the syringe fixing mechanism as described in any one of claims 16 to 18.

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