Insulin injection pen

Abstract

The invention provides an insulin injection pen, and belongs to the technical field of medical instruments, the insulin injection pen comprises an injection pen body and a needle head seat, the needle head seat comprises a base, a needle cylinder, a rotating disc, an upper cover, a driving mechanism and a replacement mechanism, the bottom of the needle cylinder is downwards provided with a linkage column, and the replacement mechanism forms a replacement position on the rotating path of the needle cylinder; the replacing mechanism comprises an upper clamping assembly and a lower clamping assembly which are arranged at a replacing position, by rotating the rotating disc, any one needle cylinder can stay at the replacing position, then a pen body is aligned with a needle head in the needle cylinder, then the driving mechanism drives the second gear to rotate, the needle cylinder is driven to rotate, and the needle head is driven to rotate; meanwhile, the needle head and the pen body are automatically connected or detached through the driving mechanism, the use safety of a user is improved, the used needle head can be temporarily stored in the needle cylinder to be treated in a unified mode, and environmental pollution caused by random discarding is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an insulin injection pen. Background Art

[0002] The incidence of diabetes in my country is high, and insulin therapy is an important means of controlling blood sugar. Studies have reported that even for patients who have used insulin therapy, the blood sugar standard rate is only 37%. The three factors that affect the effect of insulin therapy are insulin, insulin injection technology and insulin injection devices. The survey results show that irregular injections are common around the world, and the current situation of injections in my country is even more grim, including: failure to check the name and dosage form of insulin before injection, repeated use of needles for injection pens, and removal of the needle without stopping after injection or after less than 10 seconds. The insulin pens currently used in my country include disposable pens and pens with replaceable cartridges.

[0003] Among them, the special pen with replaceable drug core includes a syringe body and a needle. Usually, the syringe body and the needle are connected by threads, which ensures that the needle and the syringe body are firmly connected, thereby improving the safety of user use. However, when using this type of insulin injection pen, the syringe body and the needle need to be manually disassembled and assembled by the user, which is inconvenient to use, especially after use, the needle needs to be manually removed, which cannot guarantee the safety of user use. At the same time, the used needle is easily discarded and causes pollution. Summary of the invention

[0004] The purpose of the present invention is to provide an insulin injection pen in order to overcome the shortcomings and deficiencies of the prior art.

[0005] The technical solution adopted by the present invention is as follows: The present application provides an insulin injection pen, comprising an injection pen body and a needle holder, wherein the injection pen body comprises a pen body, a needle threadedly connected to the front end of the pen body, and a protective cover sleeved outside the needle; The needle seat comprises a base, a rotating disk, an upper cover, a driving mechanism and a replacement mechanism. The rotating disk is rotatably arranged on the base, and a plurality of mounting holes are evenly arranged on the upper cover along the circumference. A syringe for placing a needle is rotatably arranged in the mounting hole. A first rotation limiting structure is arranged between the needle and the syringe so that the two rotate synchronously. A linkage column is arranged downward at the bottom of the syringe, and an opening is coaxially arranged on the upper cover corresponding to the syringe. The driving mechanism includes a micro motor, a first gear and a second gear. A mounting frame is provided on the base, the micro motor is provided on the mounting frame, the first gear is connected to the micro motor, and the second gear is rotatably provided at the bottom of the base and meshes with the first gear. The replacement mechanism forms a replacement position on the rotation path of the syringe, and the replacement mechanism includes an upper clamping assembly and a lower clamping assembly arranged at the replacement position, and the upper clamping assembly includes a first upper clamping block and a second upper clamping block, and at least one of the first upper clamping block and the second upper clamping block is elastically supported by a first elastic member, so that an upper elastic clamping opening for clamping the syringe is formed therebetween, and the lower clamping assembly includes a first lower clamping block and a second lower clamping block, and at least one of the first lower clamping block and the second lower clamping block is elastically supported by a second elastic member, so that a lower elastic clamping opening for clamping a linkage column is formed therebetween, and the syringe can rotate when clamped in the upper elastic clamping opening, and the lower clamping assembly is arranged on the second gear and rotates synchronously therewith, and when the linkage column is clamped in the lower elastic clamping opening, it rotates synchronously with the second gear; When the rotating disk is rotated, a plurality of syringes pass through the replacement position in sequence.

[0006] In some embodiments, the mounting frame is provided with a mounting plate toward the replacement position direction, the first upper clamp block is slidably provided on the mounting plate toward the replacement position direction, the first upper clamp block is provided with the first elastic member at one end away from the second upper clamp block, the second upper clamp block is fixed to the base, and under the action of the first elastic member, the upper elastic clamp is formed between the first upper clamp block and the second upper clamp block.

[0007] In some embodiments, a first movable cavity and a second movable cavity are provided on the upper end surface of the second gear, the first lower clamp block is slidably disposed in the first movable cavity toward the linkage column, and the second lower clamp block is slidably disposed in the second movable cavity toward the linkage column, and the rear ends of the first lower clamp block and the second lower clamp block are both provided with the second elastic member, and under the action of the second elastic member, the lower elastic clamping opening is formed between the first lower clamp block and the second lower clamp block.

[0008] In some embodiments, an upper clamping portion adapted to the outer wall of the syringe is provided on the side where the first upper clamping block is close to the second upper clamping block, and a lower clamping portion adapted to the outer wall of the linkage column is provided on the side where the first lower clamping block is close to the second lower clamping block, and the upper elastic clamping opening is provided with a first guide opening at both ends of the syringe rotation path, and the lower elastic clamping opening is provided with a second guide opening at both ends of the syringe rotation path.

[0009] In some embodiments, the two opposite surfaces of the linkage column located in the moving direction of the first upper clamp are set as planes, and a positioning groove is set on the base along the rotation path of the syringe. The positioning groove includes two ports and is respectively located on both sides of the second gear.

[0010] In some embodiments, an arc track extends from the upper portion of the two ports toward the linkage column, the arc track is arranged along the rotation path of the linkage column and is offset from the syringe, and the distance between the end of the arc track and the linkage column is smaller than the diameter of the linkage column.

[0011] In some embodiments, it also includes a cover removal mechanism, which includes a first cover clamp block, a second cover clamp block, a lifting member and a partition. A positioning protrusion is provided on the outer wall of the protective cover, a mounting cavity is formed between the partition and the bottom of the syringe, a channel is provided in the linkage column, and a through hole connecting the inner cavity of the syringe and the channel is provided at the bottom of the syringe. The lifting member includes an umbrella-shaped portion extending into the inner cavity of the syringe and a rod portion slidably arranged in the channel, a limiting ring is provided on the end of the rod portion away from the umbrella-shaped portion, a first spring is provided between the limiting ring and the bottom end surface of the through hole, the lower end of the rod portion extends out of the channel, and the first cover clamp block and the second cover clamp block are separated. The cam is provided with a plurality of springs, each of which is provided with a plurality of springs that are adapted to fit the cam and the plurality of springs that are adapted to fit the cam. When the rotating disk is moved downward, the syringe is driven to move downward, so that the lifting member rises, and through the cooperation between the umbrella-shaped portion and the conical surface, the first cover clamping block and the second cover clamping block release the clamping of the protective cover.

[0012] In some embodiments, the cover removal mechanism also includes an isolation ring, which is arranged between the rotating disk and the third spring. An arc-shaped abutment portion is arranged at the upper end of the isolation ring. A first positioning hole is arranged at the bottom of the isolation ring corresponding to the third spring, and a second positioning hole is arranged at the bottom of the movable groove corresponding to the first positioning hole.

[0013] In some embodiments, a pen holder for placing the pen body is disposed on the upper cover above the replacement position, the pen holder is connected to the syringe, and a second rotation limiting structure is disposed between the pen body and the pen holder.

[0014] In some embodiments, the first rotation limiting structure includes a first limiting block arranged on the inner wall of the syringe and a first limiting groove arranged on the outer wall of the needle head, and the second rotation limiting structure includes a second limiting block arranged on the inner wall of the pen barrel and a second limiting groove arranged on the outer wall of the pen body. The number of the first limiting blocks is the same as the number of the second limiting blocks, and they are arranged correspondingly along the same straight line.

[0015] The beneficial effects of the present invention are as follows: in the present invention, by rotating the rotating disk, any syringe can be stopped at the replacement position, and then the pen body is aligned with the needle in the syringe, and then the second gear is driven by the driving mechanism to rotate, driving the syringe to rotate, driving the needle to rotate, and at the same time, by controlling the forward and reverse rotation of the micro motor, the needle and the pen body are threadedly connected or disassembled, thereby realizing automatic disassembly and assembly of the needle, improving the safety of user use, and the used needles can be temporarily stored in the syringe for unified treatment, avoiding arbitrary discarding and causing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0017] Figure 1 is a schematic diagram of an insulin injection pen in the present invention; Figure 2 The invention discloses an explosion of an insulin injection pen. Figure 1 ; Figure 3 The invention discloses an explosion of an insulin injection pen. Figure 2 ; Figure 4 It is a partial cross-sectional view of an insulin injection pen in the present invention; Figure 5 A schematic diagram of the partial structure of an insulin injection pen in the present invention Figure 1 ; Figure 6 A partial structural cross-sectional view of an insulin injection pen in the present invention; Figure 7 It is a partial schematic diagram of an insulin injection pen in the present invention; Figure 8 It is a cross-sectional view of the syringe and the cover removal mechanism in the present invention; Fig. 9 is a cross-sectional view of the base in the present invention; Fig.10 Schematic diagram of the injection pen body, upper cover, needle and syringe in the present invention. DETAILED DESCRIPTION

[0018] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0019] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0021] In addition, the terms "installed", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0022] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0024] Traditional insulin injection pens usually include a syringe body and a needle, and the two are connected by a thread. Although this is firm, it requires users to manually disassemble and assemble it, which increases the complexity of operation. In particular, manual handling of the needle after use may pose a safety hazard, and improper disposal may easily cause environmental pollution.

[0025] Based on the above problems, this specification provides an insulin injection pen, including an injection pen body 1 and a needle seat 2. The injection pen body 1 includes a pen body 101, a needle 102 threadedly connected to the front end of the pen body 101, and a protective cover 103 sleeved on the outside of the needle 102. The upper end of the needle 102 is provided with a connecting hole with an internal thread, and usually a tearable protective film 1020 is pasted on the connecting hole. The protective film 1020 is provided with a lug portion for tearing, and the protective cover 103 and the protective film 1020 can prevent the needle 102 from being contaminated.

[0026] Among them, the needle seat 2 includes a base 3, a rotating disk 4, an upper cover 5, a driving mechanism 6 and a replacement mechanism 7. The rotating disk 4 is rotatably set on the base 3, and a plurality of mounting holes 40 are evenly arranged along the circumference thereof, usually set to more than six, so as to store more needles 102. Preferably, the number of mounting holes 40 is 8, so that the overall volume of the needle seat 2 will not be too large, and the space utilization rate is high.

[0027] Secondly, a syringe 8 for placing a needle 102 is rotatably arranged in the mounting hole 40, a first rotation limiting structure 9 is arranged between the needle 102 and the syringe 8, so that the two rotate synchronously, a linkage column 80 is arranged downward at the bottom of the syringe 8, the driving mechanism 6 includes a micro motor 60, a first gear 61 and a second gear 62, a mounting frame 30 is arranged on the base 3, the micro motor 60 is arranged on the mounting frame 30, the first gear 61 is connected to the micro motor 60, and the second gear 62 is rotatably arranged at the bottom of the base 3 and meshes with the first gear 61, as shown in FIG. Figure 4 As shown, the micro motor 60 is inverted in the mounting frame 30, and preferably has a micro motor 60 with a speed regulating gear set. In addition, a mounting box 51 is provided on the lower end surface of the upper cover 5, and a circuit board 52, a controller, etc. are provided in the mounting box 51. An operation panel, a display screen, etc. are provided on the upper end surface of the upper cover 5. Two pins extend from one end of the micro motor 60 close to the mounting box 51, extend into the mounting box 51, and are plugged into the circuit board 52.

[0028] Importantly, the replacement mechanism 7 forms a replacement position 10 on the rotation path of the syringe 8. When the rotating disk 4 is rotated, several syringes 8 pass through the replacement position 10 in sequence, that is, the needle 102 can be automatically disassembled and assembled at the replacement position 10. The replacement mechanism 7 includes an upper clamping assembly and a lower clamping assembly arranged at the replacement position 10. The upper clamping assembly includes a first upper clamping block 70 and a second upper clamping block 71. At least one of the first upper clamping block 70 and the second upper clamping block 71 is elastically supported by a first elastic member 72, so that an upper elastic clamping opening for clamping the syringe 8 is formed therebetween. The lower clamping assembly includes a first lower clamping block 73 and a second lower clamping block 74. At least one of the first lower clamping block 73 and the second lower clamping block 74 is elastically supported by a second elastic member 75, so that a lower elastic clamping opening for clamping the linkage column 80 is formed therebetween. The upper cover 5 can be coaxially provided with an opening 500 corresponding to each syringe 8 to facilitate the operation of the pen body 101.

[0029] It can be understood that the syringe 8 can rotate when clamped in the upper elastic clamping mouth, and the lower clamping assembly is arranged on the second gear 62 and rotates synchronously therewith. When the linkage column 80 is clamped in the lower elastic clamping mouth, it rotates synchronously with the second gear 62. With such arrangement, by rotating the rotating disk 4, any syringe 8 can be stopped at the replacement position 10, and then the pen body 101 is aligned with the needle 102 in the syringe 8, and then the driving mechanism 6 drives the second gear 62 to rotate, driving the syringe 8 to rotate, and driving the needle 102 to rotate. At the same time, by controlling the forward and reverse rotation of the micro motor 60, the needle 102 is threadedly connected or disassembled with the pen body 101, thereby realizing the automatic disassembly and assembly of the needle 102, improving the safety of user use, and the used needle 102 can be temporarily stored in the syringe 8 for unified treatment to avoid arbitrary discard and environmental pollution.

[0030] Secondly, needles of different types or specifications can be stored in the syringe 8 , and corresponding markings can be made on the upper cover 5 for easy distinction.

[0031] In addition, by providing the upper elastic clamp and the lower elastic clamp, when the syringe 8 is rotated into the replacement position 10, a gear effect can be formed, so that the user can clearly feel that the syringe 8 has been rotated into place.

[0032] It can be understood that there is a gap between the upper end surface of the syringe 8 and the lower end surface of the upper cover 5 to prevent the protective film 1020 from interfering with the rotation of the rotating disk 4. Since the protective film 1020 is thin, the gap usually only needs to be 0.2mm-0.5mm.

[0033] In some embodiments, the mounting frame 30 is provided with a mounting plate 300 toward the replacement position 10, the first upper clamp block 70 is slidably provided on the mounting plate 300 toward the replacement position 10, the first upper clamp block 70 is provided with the first elastic member 72 at one end away from the second upper clamp block 71, the second upper clamp block 71 is fixed to the base 3, and under the action of the first elastic member 72, the upper elastic clamp is formed between the first upper clamp block 70 and the second upper clamp block 71.

[0034] Secondly, if Figure 7 As shown, a cross-shaped sliding rod portion 7000 and positioning rod portions 7001 located on both sides of the sliding rod portion 7000 are provided at one end of the first upper clamping block 70 close to the mounting plate 300, and a mounting frame is provided on the mounting plate 300, the sliding rod portion 7000 is slidably set in the mounting frame, and the positioning rod portions 7001 are abutted against both sides of the mounting frame. Such a setting effectively controls the moving range of the first upper clamping block 70, improves the stability of the movement of the first upper clamping block 70, and ensures the stability of the installation of the first elastic member 72. A cover plate should be provided on the mounting frame.

[0035] In other embodiments, the first upper clamp block 70 and the second upper clamp block 71 are both provided with a first elastic member 72 on the rear side, or the first elastic member 72 is only provided on the rear side of the second upper clamp block 71, to fix the first upper clamp block 70, but the preferred scheme is the first one, which has a simpler structure and makes the structure of the needle seat 2 more compact.

[0036] In some embodiments, a first active cavity 620 and a second active cavity 621 are provided on the upper end surface of the second gear 62, the first lower clamp block 73 is slidably disposed in the first active cavity 620 toward the linkage column 80, and the second lower clamp block 74 is slidably disposed in the second active cavity 621 toward the linkage column 80, and the rear ends of the first lower clamp block 73 and the second lower clamp block 74 are both provided with the second elastic member 75, and under the action of the second elastic member 75, the lower elastic clamping opening is formed between the first lower clamp block 73 and the second lower clamp block 74.

[0037] It is understandable that Figure 7 As shown, a limiting structure needs to be provided between the first lower clamping block 73 and the first active cavity 620 and between the second lower clamping block 74 and the second active cavity 621 to limit the moving range of the two lower clamping blocks, and the specific structure will not be described in detail.

[0038] In other embodiments, the first lower clamping block 73 and the second lower clamping block 74 can be fixed at any one of them.

[0039] In some embodiments, an upper clamping portion 700 adapted to the outer wall of the syringe 8 is provided on the side where the first upper clamping block 70 and the second upper clamping block 71 are close to each other, and a lower clamping portion 701 adapted to the outer wall of the linkage column 80 is provided on the side where the first lower clamping block 73 and the second lower clamping block 74 are close to each other. The upper elastic clamping opening is provided with a first guide opening 76 at both ends of the rotation path of the syringe 8, and the lower elastic clamping opening is provided with a second guide opening 77 at both ends of the rotation path of the syringe 8. Specifically, arc surfaces and / or inclined surfaces are provided at both ends of the first upper clamping block 70 and the second upper clamping block 71 to form a first guide opening 76, and the same is true for the first lower clamping block 73 and the second lower clamping block 74. With such a configuration, the syringe 8 and the linkage column 80 can be smoothly rotated into or out of the replacement position 10.

[0040] In some embodiments, the two opposite surfaces of the linkage column 80 located in the moving direction of the first upper clamping block 70 are set as planes, and a positioning groove 11 is set on the base 3 along the rotation path of the syringe 8. The positioning groove 11 includes two ports and is respectively located on both sides of the second gear 62. Such a configuration can prevent the syringe 8 from rotating when the rotating disk 4 rotates. It should be understood that it is necessary to set the driving mechanism 6 to rotate an integer number of circles to lock the pen body 101 and the needle head 102 bolts, thereby ensuring that the linkage column 80 is rotated into the lower elastic clamp at the correct position.

[0041] In some embodiments, an arc track 110 extends from the upper portions of the two ports toward the linkage column 80. The arc track 110 is arranged along the rotation path of the linkage column 80 and is offset from the syringe 8. The distance between the end of the arc track 110 and the linkage column 80 is smaller than the diameter of the linkage column 80. This arrangement further ensures that the linkage column 80 is smoothly and correctly rotated into the lower elastic clamp. At the same time, even if the linkage column 80 is slightly deflected, the linkage column 80 can be adjusted.

[0042] In some embodiments, a cover removal mechanism is also included, the cover removal mechanism includes a first cover clamp block 12, a second cover clamp block 13, a lifting member 14 and a partition 15, the outer wall of the protective cover 103 is provided with a positioning protrusion 1030, a mounting cavity 150 is formed between the partition 15 and the bottom of the syringe 8, a channel 800 is provided in the linkage column 80, and a through hole 801 connecting the inner cavity of the syringe 8 and the channel 800 is provided at the bottom of the syringe 8, the lifting member 14 includes an umbrella-shaped portion 140 extending into the inner cavity of the syringe 8 and a rod portion 141 slidably arranged in the channel 800, and the rod portion 141 A limiting ring 142 is provided at the end away from the umbrella-shaped portion 140, and a first spring 16 is provided between the limiting ring 142 and the bottom end surface of the through hole 801. The lower end of the rod portion 141 extends out of the channel 800, and the first cover clamp block 12 and the second cover clamp block 13 are respectively located on both sides of the umbrella-shaped portion 140 and are slidably provided in the installation cavity 150 toward the umbrella-shaped portion 140. Preferably, limiting structures are respectively provided between the first cover clamp block 12 and the second cover clamp block 13 and the partition plate 15 to ensure the moving range and moving direction of the two, which can usually be achieved by using matching positioning protrusions and positioning grooves.

[0043] Secondly, the first cover clamp block 12 and the second cover clamp block 13 both include a clamping portion 120 and a linkage portion 121. The inner wall of the clamping portion 120 is provided with a positioning groove 122 adapted to the positioning protrusion 1030. A second spring 17 is provided between the end of the linkage portion 121 away from the umbrella-shaped portion 140 and the syringe 8, and a conical surface 123 matched with the umbrella-shaped portion 140 is provided at the end thereof close to the umbrella-shaped portion 140. Under the action of the second spring 17, the first cover clamp block 12 and the second cover clamp block 13 clamp the protective cover 103. The base 3 is provided with a movable groove 31, and the rotating disk 4 is arranged to slide up and down along the movable groove 31. A plurality of third springs 18 are arranged between the lower end of the rotating disk 4 and the bottom of the movable groove 31; when the rotating disk 4 is moved downward, the syringe 8 is driven to move downward, so that the lifting member 14 rises, and through the cooperation of the umbrella-shaped portion 140 and the conical surface 123, the first cover clamp block 12 and the second cover clamp block 13 release the clamping of the protective cover 103. With this arrangement, the protective cover 103 can be automatically removed, thereby improving the use efficiency of the insulin injection pen.

[0044] In some embodiments, the cover removal mechanism also includes an isolation ring 19, which is arranged between the rotating disk 4 and the third spring 18. The upper end of the isolation ring 19 is provided with an arc-shaped abutment portion 190. With this arrangement, the rotating disk 4 rotates more smoothly and will not be hindered by the third spring 18. At the same time, the arc-shaped abutment portion 190 helps to reduce direct contact wear during rotation and extend the service life of the component.

[0045] In some embodiments, a first positioning hole 191 is provided at the bottom of the isolation ring 19 corresponding to the third spring 18, and a second positioning hole 310 is provided at the bottom of the movable groove 31 corresponding to the first positioning hole 191, thereby improving the stability of the third spring 18 and improving the simplicity and accuracy of the assembly process.

[0046] In some embodiments, a pen holder 20 for placing the pen body 101 is provided on the upper cover 5 above the replacement position 10, the pen holder 20 is connected to the needle holder 8, and a second rotation limiting structure 21 is provided between the pen body 101 and the pen holder 20, so that it is more convenient to automatically disassemble and assemble the needle 102.

[0047] In some embodiments, the first rotation limiting structure 9 includes a first limiting block 90 arranged on the inner wall of the syringe 8 and a first limiting groove 91 arranged on the outer wall of the needle 102, and the second rotation limiting structure 21 includes a second limiting block 210 arranged on the inner wall of the pen barrel 20 and a second limiting groove 211 arranged on the outer wall of the pen body 101. The number of the first limiting blocks 90 is the same as the number of the second limiting blocks 210, and they are arranged along the same straight line accordingly. In this way, when it is difficult to observe the second limiting block 210 on the inner wall of the syringe 8 at the replacement position 10 due to the setting of the pen barrel 20, it can be located by the second limiting block 210 on the pen barrel 20. Preferably, the number of the first limiting blocks 90 is three and they are evenly arranged on the inner wall of the syringe 8 along the circumferential direction. It can be understood that the first limiting groove 91, the second limiting block 210 and the second limiting groove 211 are all adaptively arranged.

[0048] Preferably, a plurality of vertical convex strips are evenly arranged on the outer circumference of the rotating disk 4 to reduce the difficulty of rotating the rotating disk 4 .

[0049] To sum up, when the user installs the needle 102 for use, first load the needle 102 into each syringe 8. At this time, the protective cover 103 is clamped between the first cover clamp block 12 and the second cover clamp block 13. Then, the protective film 1020 on the needle 102 that needs to be transferred to the replacement position 10 is torn off in advance, and then the rotating disk 4 is rotated to transfer the syringe 8 corresponding to the needle 102 into the upper elastic clamping opening, and at the same time, the linkage column 80 is transferred into the lower elastic clamping opening, and then the pen body 101 is inserted into the pen barrel 20, and then the first gear 61 is driven to rotate by the micro motor 60, and the second gear 62 is driven to rotate, and the syringe 8 is driven to rotate by the linkage column 80, so that the needle 102 rotates to form a threaded connection with the pen body 101. After that, the user takes out the injection pen body 1 for use, and at this time the protective cover 103 has been removed, and there is no need to remove it manually.

[0050] When the user wants to remove the needle 102 after use, he first reinserts the injection pen body 1 into the pen barrel 20 and the syringe 8 , and then reverses the micro motor 60 to remove the needle 102 from the pen body 101 .

[0051] Afterwards, the corresponding needle 102 can be replaced by rotating the rotating disk 4 and repeating the above-mentioned operation.

[0052] When all the needles 102 in the needle seat 2 are used up, the rotating disk 4 can be pushed downward to drive the syringe 8 to move downward, so that the lifting member 14 rises, and through the cooperation of the umbrella-shaped portion 140 and the conical surface 123, the first cover clamp block 12 and the second cover clamp block 13 release the clamping of the protective cover 103, so that all the needles 102 can be poured out.

[0053] It can be understood that in this description, each spring and elastic member is preferably a compression spring.

[0054] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that the requirements of this application encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0055] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0056] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. An insulin injection pen, characterized in that: The invention comprises an injection pen body (1) and a needle seat (2), wherein the injection pen body (1) comprises a pen body (101), a needle (102) threadedly connected to the front end of the pen body (101), and a protective cover (103) sleeved on the outside of the needle (102); The needle seat (2) comprises a base (3), a rotating disk (4), an upper cover (5), a driving mechanism (6) and a replacement mechanism (7); the rotating disk (4) is rotatably arranged on the base (3); a plurality of mounting holes (40) are evenly arranged on the rotating disk along the circumference; a syringe (8) for placing a needle (102) is rotatably arranged in the mounting hole (40); a first rotation limiting structure (9) is arranged between the needle (102) and the syringe (8) so that the two rotate synchronously; a linkage column (80) is arranged downward at the bottom of the syringe (8); and an opening (500) is coaxially arranged on the upper cover (5) corresponding to the syringe (8); The driving mechanism (6) comprises a micro motor (60), a first gear (61) and a second gear (62); a mounting frame (30) is provided on the base (3); the micro motor (60) is arranged on the mounting frame (30); the first gear (61) is connected to the micro motor (60); and the second gear (62) is rotatably arranged at the bottom of the base (3) and meshes with the first gear (61); The replacement mechanism (7) forms a replacement position (10) on the rotation path of the syringe (8), and the replacement mechanism (7) comprises an upper clamping assembly and a lower clamping assembly arranged at the replacement position (10), the upper clamping assembly comprises a first upper clamping block (70) and a second upper clamping block (71), at least one of the first upper clamping block (70) and the second upper clamping block (71) is elastically supported by a first elastic member (72), so that an upper elastic clamping opening for clamping the syringe (8) is formed between the two, and the lower clamping assembly comprises a first elastic member (72) and a second elastic member (71) a lower clamping block (73) and a second lower clamping block (74), at least one of the first lower clamping block (73) and the second lower clamping block (74) being elastically supported by a second elastic member (75), so that a lower elastic clamping opening for clamping a linkage column (80) is formed between the two, the syringe (8) can rotate when clamped in the upper elastic clamping opening, the lower clamping assembly is arranged on the second gear (62) and rotates synchronously therewith, and when the linkage column (80) is clamped in the lower elastic clamping opening, it rotates synchronously with the second gear (62); When the rotating disk (4) is rotated, a plurality of syringes (8) pass through the replacement position (10) in sequence.

2. An insulin injection pen according to claim 1, characterized in that: The mounting frame (30) is provided with a mounting plate (300) in a direction toward the replacement position (10); the first upper clamping block (70) is slidably provided on the mounting plate (300) in a direction toward the replacement position (10); the first upper clamping block (70) is provided with the first elastic member (72) at one end away from the second upper clamping block (71); the second upper clamping block (71) is fixed to the base (3); and under the action of the first elastic member (72), the upper elastic clamping opening is formed between the first upper clamping block (70) and the second upper clamping block (71).

3. An insulin injection pen according to claim 2, characterized in that: The upper end surface of the second gear (62) is provided with a first movable cavity (620) and a second movable cavity (621); the first lower clamping block (73) is slidably disposed in the first movable cavity (620) toward the linkage column (80); the second lower clamping block (74) is slidably disposed in the second movable cavity (621) toward the linkage column (80); the rear ends of the first lower clamping block (73) and the second lower clamping block (74) are both provided with the second elastic member (75); and under the action of the second elastic member (75), the lower elastic clamping opening is formed between the first lower clamping block (73) and the second lower clamping block (74).

4. An insulin injection pen according to claim 3, characterized in that: An upper clamping portion (700) adapted to fit the outer wall of the syringe (8) is provided on the side where the first upper clamping block (70) and the second upper clamping block (71) are close to each other, and a lower clamping portion (701) adapted to fit the outer wall of the linkage column (80) is provided on the side where the first lower clamping block (73) and the second lower clamping block (74) are close to each other, and first guide openings (76) are provided at both ends of the upper elastic clamping opening on the rotation path of the syringe (8), and second guide openings (77) are provided at both ends of the lower elastic clamping opening on the rotation path of the syringe (8).

5. An insulin injection pen according to any one of claims 1 to 4, characterized in that: Two opposite surfaces of the linkage column (80) located in the moving direction of the first upper clamping block (70) are arranged as planes, and a positioning groove (11) is arranged on the base (3) along the rotation path of the needle cylinder (8), and the positioning groove (11) includes two ports and is respectively located on both sides of the second gear (62).

6. An insulin injection pen according to claim 5, characterized in that: An arc track (110) extends from the upper parts of the two ports toward the linkage column (80); the arc track (110) is arranged along the rotation path of the linkage column (80) and is offset from the syringe (8); the distance between the end of the arc track (110) and the linkage column (80) is less than the diameter of the linkage column (80).

7. An insulin injection pen according to claim 4, characterized in that: The device further comprises a cover removal mechanism, the cover removal mechanism comprising a first cover clamping block (12), a second cover clamping block (13), a lifting member (14) and a partition (15); a positioning protrusion (1030) is provided on the outer wall of the protective cover (103); a mounting cavity (150) is formed between the partition (15) and the bottom of the syringe (8); a channel (800) is provided in the linkage column (80); and a through hole (801) is provided at the bottom of the syringe (8) for connecting the inner cavity of the syringe (8) and the channel (800). The lifting member (14) comprises an umbrella-shaped portion (140) extending into the inner cavity of the syringe (8) and a rod portion (141) slidably arranged in the channel (800), a limit ring (142) is arranged at one end of the rod portion (141) away from the umbrella-shaped portion (140), a first spring (16) is arranged between the limit ring (142) and the bottom end surface of the through hole (801), the lower end of the rod portion (141) extends out of the channel (800), the first cover clamp block (12) and the second cover clamp block (13) The first cover clamp block (12) and the second cover clamp block (13) are respectively located on both sides of the umbrella-shaped portion (140) and are slidably arranged in the installation cavity (150) toward the umbrella-shaped portion (140). Both the first cover clamp block (12) and the second cover clamp block (13) include a clamping portion (120) and a linkage portion (121). The inner wall of the clamping portion (120) is provided with a positioning groove (122) adapted to the positioning protrusion (1030). A second spring (17) is provided between an end of the linkage portion (121) away from the umbrella-shaped portion (140) and the syringe (8). A conical surface (123) matching with the umbrella-shaped portion (140) is provided at one end close to the umbrella-shaped portion (140); under the action of the second spring (17), the first cover clamping block (12) and the second cover clamping block (13) clamp the protective cover (103); a movable groove (31) is provided on the base (3); the rotating disk (4) is arranged to slide up and down along the movable groove (31); and a plurality of third springs (18) are provided between the lower end of the rotating disk (4) and the bottom of the movable groove (31); When the rotating disk (4) is moved downward, the syringe (8) is driven to move downward, causing the lifting member (14) to rise, and through the cooperation between the umbrella-shaped portion (140) and the conical surface (123), the first cover clamping block (12) and the second cover clamping block (13) release the clamping of the protective cover (103).

8. An insulin injection pen according to claim 7, characterized in that: The cover removal mechanism further comprises an isolating ring (19), the isolating ring (19) being arranged between the rotating disk (4) and the third spring (18), the upper end of the isolating ring (19) being provided with an arc-shaped abutting portion (190), the bottom of the isolating ring (19) being provided with a first positioning hole (191) corresponding to the third spring (18), and the bottom of the movable groove (31) being provided with a second positioning hole (310) corresponding to the first positioning hole (191).

9. An insulin injection pen according to claim 1, characterized in that: A pen holder (20) for accommodating a pen body (101) is provided on the upper cover (5) above the replacement position (10); the pen holder (20) is connected to the needle holder (8); and a second rotation limiting structure (21) is provided between the pen body (101) and the pen holder (20).

10. An insulin injection pen according to claim 9, characterized in that: The first rotation limiting structure (9) comprises a first limiting block (90) arranged on the inner wall of the syringe (8) and a first limiting groove (91) arranged on the outer wall of the needle head (102); the second rotation limiting structure (21) comprises a second limiting block (210) arranged on the inner wall of the pen barrel (20) and a second limiting groove (211) arranged on the outer wall of the pen body (101); the number of the first limiting blocks (90) is the same as the number of the second limiting blocks (210), and they are arranged correspondingly along the same straight line.

Images