Booster and injection device

Abstract

The utility model discloses a booster and an injection device, the booster comprises a clamping sleeve and a push plate, the clamping sleeve is sleeved outside a sleeve of an injector, and the push plate is slidably sleeved on the outer side surface of the clamping sleeve; the clamping sleeve is provided with a plurality of sets of adjusting holes distributed in the axial direction of the clamping sleeve, the push plate is provided with a set of clamping teeth, and the clamping teeth are matched with any set of adjusting holes in a clamping mode, so that the fixing position of the push plate on the clamping sleeve can be adjusted in the axial direction of the sleeve, the height of the push plate can be flexibly adjusted according to the size of the hand of a user, and comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a booster and an injection device. Background Art

[0002] With economic development, the application areas of prefilled products have become increasingly extensive. Prefilled products are the process of directly filling injectable drugs into syringes, combining the syringe and the liquid drug packaging container into one, and then directly injecting them when used. Taking prefilled syringes as an example, prefilled syringes are a new type of drug packaging that can store drugs and be used for general injections. They can effectively reduce waste and secondary contamination caused by adsorption during storage and transfer. They are commonly used for the packaging of special drugs such as vaccines. They are the future trend of injectable drug packaging and may gradually replace traditional ampoules, vials, and ordinary syringes to become the main packaging method for drugs.

[0003] The handle of a prefilled syringe is formed by the outer curl of the glass barrel during molding. For highly viscous liquids, a greater force is required to inject them. This makes it difficult for fingers to grip the outer curl of the syringe, especially for syringes with a smaller outer diameter. To address this, existing technologies incorporate a booster sleeve around the edge of the syringe, increasing the curled area and making it easier to apply force, hold the needle, and avoid misoperation of the push rod. However, the handle of existing boosters is fixed and cannot be adjusted, which can cause discomfort due to the varying hand sizes of users. Utility Model Content

[0004] The utility model aims to provide a booster, which solves the technical problem that the handle position of the existing booster cannot be adjusted, causing discomfort in use.

[0005] To achieve the above-mentioned purpose, the utility model provides a booster, including a sleeve and a push plate, the sleeve is sleeved outside the sleeve of the syringe, and the push plate can be slidably sleeved on the outer side of the sleeve; the sleeve is provided with a plurality of groups of adjustment holes distributed along its axial direction, and the push plate is provided with a group of engaging teeth, which engage with any group of adjusting holes.

[0006] Preferably, the clamping sleeve includes a flange clamping portion, the flange clamping portion is formed with a flange clamping groove, and the flange clamping groove is used to clamp with the flange of the sleeve.

[0007] Preferably, the flange clamping portion includes an upper clamping plate, a lower clamping plate and a side bent plate, and the upper clamping plate and the lower clamping plate are respectively and integrally arranged in parallel on the upper and lower sides of the side bent plate; the upper clamping plate, the lower clamping plate and the side bent plate form a flange clamping groove; the upper clamping plate is provided with an upper clamping hole, and the lower clamping plate is provided with a lower clamping hole. Both the upper clamping hole and the lower clamping hole are semi-waisted holes and the two are coaxially penetrated to form an avoidance through hole, and the avoidance through hole is used for the push rod to pass through.

[0008] Preferably, the clamping sleeve further includes a sleeve clamping portion, the sleeve clamping portion is formed with a sleeve clamping groove, and the sleeve clamping groove is used to clamp with the tube body of the sleeve.

[0009] Preferably, the sleeve clamping portion and the flange clamping portion are integrally and coaxially connected.

[0010] Preferably, the sleeve clamping portion includes an arc clamping plate with a notch and a left clamping plate and a right clamping plate integrally arranged on two opposite sides of the notch; the left clamping plate and the right clamping plate are parallel to each other and extend along the axial direction of the arc clamping plate; an inlet is formed between the left clamping plate and the right clamping plate, and the inlet is used to guide the sleeve into the sleeve clamping groove.

[0011] Preferably, a left elastic protrusion and a right elastic protrusion are formed on opposite sides of the left and right clamping plates respectively, and an elastic clamping groove is formed between the left elastic protrusion and the right elastic protrusion, and the width of the elastic clamping groove is smaller than the diameter of the sleeve.

[0012] Preferably, the push plate includes a left handle, a right handle and an adjusting bent plate integrally fixed between the left handle and the right handle, and the adjusting bent plate can be slidably mounted on the outer side surface of the arc clamping plate; left and right clamping claws are formed on both side edges of the adjusting bent plate; the left clamping claw abuts against the left guide edge of the left clamping plate, and the right clamping claw abuts against the right guide edge of the right clamping plate; the left guide edge and the right guide edge are used to jointly guide the adjusting bent plate to slide along the outer side surface of the arc clamping plate.

[0013] Preferably, a left inclined surface is provided on the side of the left claw away from the left guide edge, and the left inclined surface is set at an angle to the left abutting surface of the left claw; a right inclined surface is provided on the side of the right claw away from the right guide edge, and the right inclined surface is set at an angle to the right abutting surface of the right claw; the left inclined surface and the right inclined surface are distributed in a trumpet shape.

[0014] Preferably, the engaging teeth are integrally formed on the inner side wall of the adjusting bent plate; the engaging teeth extend obliquely from the inner side wall of the adjusting bent plate toward the direction close to the flange engaging portion.

[0015] The utility model also provides an injection device, comprising a syringe and the above-mentioned booster, wherein the booster is sleeved on the outside of the syringe.

[0016] Compared with the background technology, the utility model optimizes the structure of the booster. The optimized booster is a split structure, including a sleeve and a push plate. The push plate is provided with several groups of adjustment holes, all of which are distributed along the axial direction of the sleeve. The push plate is provided with a group of engaging teeth, and the engaging teeth are only engaged with any group of adjustment holes. In this way, the fixed position of the push plate on the sleeve can be adjusted along the axial direction of the sleeve, so that the height of the push plate can be flexibly adjusted according to the size of the user's hand, thereby improving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 A structural diagram of a booster provided by an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 The structure diagram of the middle ferrule;

[0020] Figure 3 for Figure 1 Structural diagram of the middle push plate.

[0021] The reference numerals are as follows:

[0022] Card sleeve 1 and push plate 2;

[0023] Adjustment hole 11, flange clamping portion 12 and sleeve clamping portion 13;

[0024] Flange clamping groove 121, upper clamping plate 122, lower clamping plate 123, side bending plate 124 and avoidance through hole 125;

[0025] Sleeve clamping slot 131, arc clamping plate 132, left clamping plate 133 and right clamping plate 134;

[0026] Left elastic protrusion 1331 and left guide edge 1332;

[0027] Right elastic protrusion 1341 and right guide edge 1342;

[0028] The engaging teeth 21, the left handle 22, the right handle 23 and the adjusting bent plate 24;

[0029] Left claw 241 and right claw 242;

[0030] a left abutting surface 2411 and a left inclined surface 2412;

[0031] The right abutting surface 2421 and the right inclined surface 2422 . DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

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

[0034] The embodiment of the utility model discloses a booster, as shown in the attached Figures 1 to 3 As shown, it includes a ferrule 1 and a push plate 2. The ferrule 1 is sleeved outside the syringe barrel, which is cylindrical and has an integral flange formed along the open end of the barrel. The push plate 2 can be slidably sleeved on the outer side of the ferrule 1 for the user to hold.

[0035] As attached Figure 2 As shown, the ferrule 1 is provided with several groups of adjustment holes 11, and all the adjustment holes 11 are distributed along the axial direction of the ferrule 1. Each group of adjustment holes 11 is composed of three square holes, and each square hole passes through the wall thickness direction of the ferrule 1. All the adjustment holes 11 are distributed at equal intervals. The push plate 2 is provided with a group of engaging teeth 21, and three engaging teeth 21 form a group. The engaging teeth 21 engage with any group of adjustment holes 11, and all the adjustment holes 11 form a plurality of gears. The push plate 2 can be fixed at each gear position by means of the engaging teeth 21, so that the fixed position of the push plate 2 on the ferrule 1 can be adjusted along the axial direction of the sleeve, so that the height of the push plate 2 can be flexibly adjusted according to the size of the user's hand, avoiding inconvenience in operation when the user injects and improving comfort.

[0036] The sleeve 1 includes a flange engaging portion 12, which is formed with a flange engaging groove 121. The flange engaging groove 121 is used to engage with the flange of the sleeve and axially define the position of the sleeve. The thickness of the flange engaging groove 121 is equal to the thickness of the flange. One end of the flange engaging groove 121 is open and the other end is closed, which facilitates the disassembly and assembly of the syringe. The width of the flange engaging groove 121 is equal to the diameter of the flange, and the length of the flange engaging groove 121 is greater than the diameter of the flange, ensuring that the flange engaging groove 121 can completely cover the flange and prevent the flange from being loosely fixed.

[0037] The flange clamping portion 12 includes an upper clamping plate 122, a lower clamping plate 123 and a side bent plate 124. The upper clamping plate 122 and the lower clamping plate 123 are respectively and integrally arranged parallel to the upper and lower sides of the side bent plate 124. The side bent plate 124 is surrounded by a circular arc segment and two straight line segments. The two straight line segments are respectively arranged at the two ends of the circular arc segment, and the two straight line segments are tangent to the circular arc segment. The upper clamping plate 122, the lower clamping plate 123 and the side bent plate 124 form a flange clamping groove 121. The upper clamping plate 122 is provided with an upper clamping hole, and the lower clamping plate 123 is provided with a lower clamping hole. Both the upper clamping hole and the lower clamping hole are semi-waisted holes, and the upper clamping hole and the lower clamping hole are coaxially penetrated to form an avoidance through hole 125. The avoidance through hole 125 is used for the push rod to pass through to avoid interference between the booster and the push rod of the syringe. The widths of the upper clamping hole and the lower clamping hole are equal, and both widths are larger than the diameter of the push rod.

[0038] The ferrule 1 also includes a sleeve clamping portion 13, which is formed with a sleeve clamping groove 131. The sleeve clamping groove 131 is used to clamp with the tube body of the sleeve. The length of the sleeve clamping portion 13 is less than or equal to the length of the tube body, ensuring that the cone head provided at the rear end of the tube body can be exposed outside the sleeve clamping portion 13, wherein the cone head is used to clamp the needle. The sleeve clamping portion 13 and the flange clamping portion 12 are coaxially connected in an integrated manner, so that the sleeve clamping groove 131 and the flange clamping groove 121 are coaxially connected, ensuring that the booster can be smoothly sleeved outside the sleeve. The sleeve clamping portion 13 is fixed to the bottom end of the flange clamping portion 12 by injection molding.

[0039] The sleeve clamping portion 13 includes a circular arc clamping plate 132, a left clamping plate 133, and a right clamping plate 134. The circular arc clamping plate 132 has a notch, and the left and right clamping plates 133 and 134 are integrally provided on opposite sides of the notch. The left and right clamping plates 133 and 134 are parallel to each other and extend axially along the circular arc clamping plate 132. The circular arc clamping plate 132, the left and right clamping plates 133, and the right and left clamping plates 134 are of equal thickness.

[0040] An inlet is formed between the left and right clamping plates 133 and 134. The inlet is used to guide the sleeve into the sleeve retaining groove 131 of the arc-shaped clamping plate 132. The width of the inlet is smaller than the diameter of the arc-shaped clamping plate 132. When the sleeve is inserted, the inlet is stretched open by the sleeve, increasing its width. When the sleeve is installed in the sleeve retaining groove 131, the width of the inlet decreases, ensuring that the sleeve retaining portion 13 firmly clamps the sleeve, preventing the sleeve from shaking relative to the sleeve retaining portion 13 during the injection process. The user can use the booster to smoothly push and pull the push rod in the sleeve.

[0041] A left elastic protrusion 1331 and a right elastic protrusion 1341 are respectively formed on the opposite sides of the left clamping plate 133 and the right clamping plate 134, that is, a left elastic protrusion 1331 is provided on the side opposite to the right clamping plate 134, and a right elastic protrusion 1341 is provided on the side opposite to the left clamping plate 133. An elastic clamping groove is formed between the left elastic protrusion 1331 and the right elastic protrusion 1341. The width of the elastic clamping groove is smaller than the diameter of the sleeve. During the process of installing the sleeve, the sleeve expands the elastic clamping groove to smoothly enter the sleeve clamping groove 131. After the sleeve enters the sleeve clamping groove 131, the elastic clamping groove clamps the sleeve by closing. As a preferred embodiment, a left elastic protrusion 1331 is provided at each end of the left card plate 133, and a right elastic protrusion 1341 is provided at each end of the right card plate 134. The left elastic protrusion 1331 and the right elastic protrusion 1341 are symmetrically arranged and have equal thickness, and both can be made of flexible materials, such as rubber protrusions.

[0042] As attached Figure 3 As shown, the push plate 2 includes a left handle 22, a right handle 23, and an adjustable curved plate 24 integrally connected between the left and right handles 22, 23. The left and right handles 22, 23 provide support for the user's hands, facilitating the application of force during injection. The left and right handles 22, 23 are symmetrically located on either side of the adjustable curved plate 24. The adjustable curved plate 24 consists of a circular plate and two flat plates, each tangent to the ends of the circular plate.

[0043] The adjusting bent plate 24 can be slidably mounted on the outer side surface of the arc clamping plate 132; a left clamping claw 241 and a right clamping claw 242 are respectively formed on both side edges of the adjusting bent plate 24; the left clamping claw 241 abuts against the left guide edge 1332 of the left clamping plate 133, and the right clamping claw 242 abuts against the right guide edge 1342 of the right clamping plate 134, so that the left guide edge 1332 and the right guide edge 1342 are used to jointly guide the adjusting bent plate 24 to slide along the outer side surface of the arc clamping plate 132. As a preferred embodiment, the left guide edge 1332 refers to the side edge of the left side clamping plate 133 away from the arc clamping plate 132, and the right guide edge 1342 refers to the side edge of the right side clamping plate 134 away from the arc clamping plate 132. The left guide edge 1332 and the right guide edge 1342 are both planes. The left clamping claw 241 abuts against the left guide edge 1332, and the right clamping claw 242 abuts against the right guide edge 1342. Therefore, the left guide edge 1332 and the right guide edge 1342 can both limit the push plate 2 to move up and down only along the clamping sleeve 1 and guide the push plate 2 to move up and down relative to the clamping sleeve 1. The side where the left clamping claw 241 abuts against the left guide edge 1332 is the left abutting surface 2411, and the side where the right clamping claw 242 abuts against the right guide edge 1342 is the right abutting surface 2421. Both the left abutting surface 2411 and the right abutting surface 2421 are planes.

[0044] A left inclined surface 2412 is provided on the side of the left clamping claw 241 away from the left guide edge 1332, and the left inclined surface 2412 is set at an angle to the left abutting surface 2411; a right inclined surface 2422 is provided on the side of the right clamping claw 242 away from the right guide edge 1342, and the right inclined surface 2422 is set at an angle to the right abutting surface 2421; the left inclined surface 2412 and the right inclined surface 2422 are distributed in a trumpet shape, which can not only enable the push plate 2 to be clamped on the clamping sleeve 1 by relying on elastic force, but also guide the sleeve into the sleeve slot 131 during the process of inserting the sleeve.

[0045] The engaging teeth 21 are integrally formed on the inner sidewall of the adjustment bend 24. The engaging teeth 21 extend obliquely from the inner sidewall of the adjustment bend 24 toward the flange engaging portion 12. That is, the engaging teeth 21 extend upward from the inner sidewall of the adjustment bend 24. This allows for multi-gear adjustment only while the push plate 2 moves downward along the ferrule 1, and prevents upward movement, ensuring that the user cannot adjust the push plate 2 upward during injection. When the push plate 2 slides downward along the outer side of the ferrule 1, all the engaging teeth 21 are compressed, tending to move toward the inner sidewall of the adjustment bend 24. When the engaging teeth 21 align with the adjustment holes 11, all the engaging teeth 21 resume their elastic deformation, correspondingly engaging with each set of adjustment holes 11, securing the push plate 2 to the ferrule 1.

[0046] The embodiment of the utility model further discloses an injection device, comprising a syringe and the above-mentioned booster, wherein the booster is sleeved on the outside of the syringe to improve comfort.

[0047] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0048] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A booster, characterized in that: The invention comprises a ferrule (1) and a push plate (2), wherein the ferrule (1) is sleeved on the outside of the sleeve of the syringe, and the push plate (2) can be slidably sleeved on the outer side surface of the ferrule (1); the ferrule (1) is provided with a plurality of groups of adjustment holes (11) distributed along its axial direction, and the push plate (2) is provided with a group of engaging teeth (21), and the engaging teeth (21) are engaged with any group of the adjusting holes (11).

2. The booster according to claim 1, characterized in that The clamping sleeve (1) comprises a flange clamping portion (12), the flange clamping portion (12) is formed with a flange clamping groove (121), and the flange clamping groove (121) is used for clamping with the flange of the sleeve.

3. The booster according to claim 2, characterized in that: The flange clamping portion (12) includes an upper clamping plate (122), a lower clamping plate (123) and a side bending plate (124), wherein the upper clamping plate (122) and the lower clamping plate (123) are respectively and integrally arranged in parallel on the upper and lower sides of the side bending plate (124); the upper clamping plate (122), the lower clamping plate (123) and the side bending plate (124) form the flange clamping groove (121); the upper clamping plate (122) is provided with an upper clamping hole, and the lower clamping plate (123) is provided with a lower clamping hole, and the upper clamping hole and the lower clamping hole are both half-waist holes and the two are coaxially penetrated to form an avoidance through hole (125), and the avoidance through hole (125) is used for allowing the push rod to pass through.

4. The booster according to claim 2, characterized in that: The clamping sleeve (1) further comprises a sleeve clamping portion (13), wherein the sleeve clamping portion (13) is formed with a sleeve clamping groove (131), and the sleeve clamping groove (131) is used for clamping with the tube body of the sleeve.

5. The booster according to claim 4, characterized in that: The sleeve clamping portion (13) and the flange clamping portion (12) are integrally coaxially connected.

6. The booster according to claim 4, characterized in that: The sleeve clamping portion (13) comprises an arc clamping plate (132) with a notch and a left clamping plate (133) and a right clamping plate (134) integrally provided on two opposite sides of the notch; the left clamping plate (133) and the right clamping plate (134) are parallel to each other and extend along the axial direction of the arc clamping plate (132); an introduction port is formed between the left clamping plate (133) and the right clamping plate (134), and the introduction port is used to guide the sleeve into the sleeve clamping groove (131).

7. The booster according to claim 6, characterized in that A left elastic protrusion (1331) and a right elastic protrusion (1341) are formed on opposite sides of the left clamping plate (133) and the right clamping plate (134), respectively. An elastic clamping groove is formed between the left elastic protrusion (1331) and the right elastic protrusion (1341), and the width of the elastic clamping groove is smaller than the diameter of the sleeve.

8. The booster according to claim 6, characterized in that The push plate (2) includes a left handle (22), a right handle (23) and an adjusting bent plate (24) integrally fixed between the left handle (22) and the right handle (23), wherein the adjusting bent plate (24) can be slidably mounted on the outer side surface of the arc clamping plate (132); a left clamping claw (241) and a right clamping claw (242) are respectively formed on both side edges of the adjusting bent plate (24); the left clamping claw (241) abuts against the left guide edge (1332) of the left clamping plate (133), and the right clamping claw (242) abuts against the right guide edge (1342) of the right clamping plate (134); the left guide edge (1332) and the right guide edge (1342) are used to jointly guide the adjusting bent plate (24) to slide along the outer side surface of the arc clamping plate (132).

9. The booster according to claim 8, characterized in that: A left inclined surface (2412) is provided on a side of the left clamping claw (241) away from the left guide edge (1332), and the left inclined surface (2412) is set at an angle with the left abutting surface (2411) of the left clamping claw (241); a right inclined surface (2422) is provided on a side of the right clamping claw (242) away from the right guide edge (1342), and the right inclined surface (2422) is set at an angle with the right abutting surface (2421) of the right clamping claw (242); the left inclined surface (2412) and the right inclined surface (2422) are distributed in a trumpet shape.

10. The booster according to claim 8, characterized in that The engaging teeth (21) are integrally formed on the inner side wall of the adjusting bent plate (24); the engaging teeth (21) extend obliquely from the inner side wall of the adjusting bent plate (24) toward a direction close to the flange engaging portion (12).

11. An injection device, characterized in that: The invention comprises a syringe and the booster according to any one of claims 1 to 10, wherein the booster is sleeved on the outside of the syringe.

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