An insulin injection pen

Abstract

The present invention provides an insulin injection pen, belonging to the technical field of medical devices, which includes an injection pen body and a needle head seat. The needle head seat includes a base, a syringe barrel, a rotating disk, an upper cover, a driving mechanism and a replacement mechanism. A linkage column is disposed downward at the bottom of the syringe barrel. The replacement mechanism forms a replacement position on the rotation path of the syringe barrel. The replacement mechanism includes an upper clamping assembly and a lower clamping assembly disposed at the replacement position. In the present invention, by rotating the rotating disk, any syringe barrel can be stopped at the replacement position, then the pen body is aligned with the needle head in the syringe barrel, and then the second gear is driven to rotate by the driving mechanism, driving the syringe barrel to rotate and driving the needle head to rotate. At the same time, the driving mechanism enables the needle head to be automatically connected or disassembled from the pen body, improving the safety of user use. Moreover, the used needle head can be temporarily stored in the syringe barrel for unified treatment, avoiding environmental pollution caused by random discard.

Description

Technical Field

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

[0002] At present, the insulin special pens used in China include disposable special pens and special pens with replaceable cartridges. Among them, the special pen with a replaceable cartridge includes a syringe body and a needle. Usually, the syringe body and the needle are connected by threads, so as to ensure the firm connection between the needle and the syringe body and improve the safety of users. However, when using this kind 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 pulled out, which cannot ensure the safety of users. At the same time, the used needles are randomly discarded, which is easy to cause pollution. Summary of the Invention

[0003] The purpose of the present invention is to overcome the disadvantages and deficiencies existing in the prior art, and to provide an insulin injection pen.

[0004] The technical solution adopted by the present invention is as follows: The present application provides an insulin injection pen, which includes an injection pen body and a needle seat. The injection pen body includes a pen body, a needle threadedly connected to the front end of the pen body, and a protective cover sleeved outside the needle;

[0005] The needle seat includes 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 along the circumferential direction thereof. A syringe barrel for placing the needle is rotatably arranged in the mounting hole. A first rotation limiting structure is arranged between the needle and the syringe barrel to make the two rotate synchronously. A linkage column is arranged downward at the bottom of the syringe barrel, and an opening is coaxially arranged on the upper cover corresponding to the syringe barrel;

[0006] The driving mechanism includes a micro motor, a first gear, and a second gear. An installation frame is arranged on the base, the micro motor is arranged on the installation frame, the first gear is connected to the micro motor, and the second gear is rotatably arranged at the bottom of the base and meshes with the first gear;

[0007] The replacement mechanism forms a replacement position on the rotation path of the syringe barrel. The replacement mechanism includes an upper clamping assembly and a lower clamping assembly disposed at the replacement position. The upper clamping assembly includes a first upper clamping block and a second upper clamping block. 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 barrel is formed between the two. The lower clamping assembly includes a first lower clamping block and a second lower clamping block. 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 the linkage column is formed between the two. When the syringe barrel is clamped in the upper elastic clamping opening, it can rotate self - sufficiently. The lower clamping assembly is disposed on the second gear and rotates synchronously with it. When the linkage column is clamped in the lower elastic clamping opening, it rotates synchronously with the second gear;

[0008] When the rotating disk is rotated, a plurality of syringe barrels sequentially pass through the replacement position.

[0009] In some embodiments, an installation plate is provided on the mounting frame in the direction towards the replacement position. The first upper clamping block is slidably disposed on the installation plate in the direction towards the replacement position. The first elastic member is provided at one end of the first upper clamping block away from the second upper clamping block. The second upper clamping block is fixed to the base. Under the action of the first elastic member, the upper elastic clamping opening is formed between the first upper clamping block and the second upper clamping block.

[0010] In some embodiments, a first moving cavity and a second moving cavity are provided on the upper end surface of the second gear. The first lower clamping block is slidably disposed in the first moving cavity towards the linkage column. The second lower clamping block is slidably disposed in the second moving cavity towards the linkage column. The second elastic members are provided at the rear ends of both the first lower clamping block and the second lower clamping block. And under the action of the second elastic members, the lower elastic clamping opening is formed between the first lower clamping block and the second lower clamping block.

[0011] In some embodiments, an upper clamping portion adapted to the outer wall of the syringe barrel is provided on the side of the first upper clamping block and the second upper clamping block close to each other. A lower clamping portion adapted to the outer wall of the linkage column is provided on the side of the first lower clamping block and the second lower clamping block close to each other. First guiding openings are provided at both ends of the upper elastic clamping opening on the rotation path of the syringe barrel. Second guiding openings are provided at both ends of the lower elastic clamping opening on the rotation path of the syringe barrel.

[0012] In some embodiments, two opposite surfaces of the linkage column in the moving direction of the first upper clamping block are set as planes. A positioning groove is provided on the base along the rotation path of the syringe barrel. The positioning groove includes two ports and is respectively located on both sides of the second gear.

[0013] In some embodiments, the upper portions of the two ports extend with arc-shaped tracks towards the linkage column. The arc-shaped tracks are arranged along the rotation path of the linkage column and are offset from the syringe barrel. The distance between the end of the arc-shaped track and the linkage column is less than the diameter of the linkage column.

[0014] In some embodiments, it further includes a cover-taking mechanism. The cover-taking mechanism includes a first cover clamping block, a second cover clamping block, a lifting member and a partition. A positioning convex block is arranged on the outer wall of the protective cover. An installation cavity is formed between the partition and the bottom of the syringe barrel. A channel is arranged inside the linkage column. A through hole communicating the inner cavity of the syringe barrel and the channel is arranged at the bottom of the syringe barrel. The lifting member includes an umbrella-shaped portion extending into the inner cavity of the syringe barrel and a rod portion slidably arranged in the channel. A limiting ring is arranged at one end of the rod portion far from the umbrella-shaped portion. A first spring is arranged 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. The first cover clamping block and the second cover clamping block are respectively located on both sides of the umbrella-shaped portion and slidably arranged towards the umbrella-shaped portion in the installation cavity. Both the first cover clamping block and the second cover clamping block include a clamping portion and a linkage portion. A positioning groove adapted to the positioning convex block is arranged on the inner wall of the clamping portion. A second spring is arranged between one end of the linkage portion far from the umbrella-shaped portion and the syringe barrel. A conical surface cooperating with the umbrella-shaped portion is arranged at one end of the linkage portion close to the umbrella-shaped portion. Under the action of the second spring, the first cover clamping block and the second cover clamping block clamp the protective cover. An activity groove is arranged on the base. The rotating disc is slidably arranged up and down along the activity groove. A plurality of third springs are arranged between the lower end of the rotating disc and the bottom of the activity groove;

[0015] When the rotating disc is moved downward, it drives the syringe barrel to move downward, causing the lifting member to rise. And through the cooperation of 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.

[0016] In some embodiments, the cover-taking mechanism further includes an isolation ring. The isolation ring is arranged between the rotating disc and the third spring. An arc-shaped abutting portion is arranged at the upper end of the isolation ring. First positioning holes corresponding to the third springs are arranged at the bottom of the isolation ring. Second positioning holes corresponding to the first positioning holes are arranged at the bottom of the activity groove.

[0017] In some embodiments, a pen barrel for placing the pen body is arranged above the replacement position on the upper cover. The pen barrel is communicated with the syringe barrel. A second rotation limiting structure is arranged between the pen body and the pen barrel.

[0018] In some embodiments, the first rotation limiting structure includes a first limiting block arranged on the inner wall of the syringe barrel and a first limiting groove arranged on the outer wall of the needle head. 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 that of the second limiting blocks, and they are correspondingly arranged along the same straight line.

[0019] The beneficial effects of the present invention are as follows: By rotating the rotating disk in the present invention, any syringe can be stopped at the replacement position, then the pen body is aligned with the needle in the syringe, and then the second gear is driven to rotate by the driving mechanism, driving the syringe to rotate and the needle to rotate. At the same time, by controlling the forward and reverse rotation of the micro motor, the needle is threadedly connected to or disassembled from the pen body, thus realizing the automatic disassembly and assembly of the needle, improving the safety of user use, and the used needle can be temporarily stored in the syringe for unified treatment, avoiding environmental pollution caused by random disposal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, obtaining other drawings based on these drawings without creative efforts still belongs to the scope of the present invention.

[0021] Figure 1 It is a schematic diagram of an insulin injection pen in the present invention;

[0022] Figure 2 It is an exploded view of an insulin injection pen in the present invention Figure 1 ;

[0023] Figure 3 It is an exploded view of an insulin injection pen in the present invention Figure 2 ;

[0024] Figure 4 It is a partial cross-sectional view of an insulin injection pen in the present invention;

[0025] Figure 5 It is a schematic diagram of a partial structure of an insulin injection pen in the present invention Figure 1 ;

[0026] Figure 6 It is a partial cross-sectional view of a structure of an insulin injection pen in the present invention;

[0027] Figure 7 It is a partial schematic diagram of an insulin injection pen in the present invention;

[0028] Figure 8 It is a cross-sectional view of the syringe and the cover taking mechanism in the present invention;

[0029] Figure 9 It is a cross-sectional view of the base in the present invention;

[0030] Figure 10 It is a schematic diagram of the injection pen body, the upper cover, the needle and the syringe in the present invention. Detailed implementation manners

[0031] The following description provides specific application scenarios and requirements of this specification, aiming to enable those skilled in the art to manufacture and use the content in this specification. For those skilled in the art, various partial modifications to the disclosed embodiments are obvious, and the general principles defined here can 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 illustrated embodiments, but has the broadest scope consistent with the claims.

[0032] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0033] 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 construed as a limitation on the embodiments of this application.

[0034] In addition, the terms "installed", "set", "provided with", "connected", "connected to" 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 directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components.

[0035] 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.

[0036] Regarding the drawings of this application, it should be clearly understood that the drawings are only for the purpose of illustration and description, and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0037] Traditional insulin injection pens usually include a syringe body and a needle, and the two are connected by threads. Although this is firm, it requires the user to manually disassemble and assemble, increasing the operation complexity. In particular, manually handling the needle after use may pose a safety hazard, and improper disposal is likely to cause environmental pollution.

[0038] Based on the above problems, this specification provides an insulin injection pen, which includes an injection pen body 1 and a needle head seat 2. The injection pen body 1 includes a pen body 101, a needle head 102 threadedly connected to the front end of the pen body 101, and a protective cover 103 sleeved outside the needle head 102. An internally threaded connection hole is provided at the upper end of the needle head 102. Usually, a tearable protective film 1020 is pasted on the connection hole. The protective film 1020 is provided with a convex ear for tearing. The protective cover 103 and the protective film 1020 can prevent the needle head 102 from being contaminated.

[0039] Among them, the needle head 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 arranged 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 needle heads 102. Preferably, the number of mounting holes 40 is 8, so that the overall volume of the needle head seat 2 will not be too large and the space utilization rate is high.

[0040] Secondly, a syringe barrel 8 for placing the needle head 102 is rotatably arranged in the mounting hole 40. A first rotation limiting structure 9 is arranged between the needle head 102 and the syringe barrel 8 to make the two rotate synchronously. A linkage column 80 is arranged downward at the bottom of the syringe barrel 8. The driving mechanism 6 includes a micro motor 60, a first gear 61, and a second gear 62. An installation frame 30 is arranged on the base 3. The micro motor 60 is arranged on the installation frame 30. The first gear 61 is connected to the micro motor 60. The second gear 62 is rotatably arranged at the bottom of the base 3 and meshes with the first gear 61. As Figure 4 shown, the micro motor 60 is installed upside down in the installation frame 30, and preferably a micro motor 60 with a speed regulating gear set. In addition, an installation box 51 is arranged on the lower end surface of the upper cover 5. A circuit board 52, a controller, etc. are arranged in the installation box 51. An operation panel, a display screen, etc. are arranged on the upper end surface of the upper cover 5. Two pins extend from one end of the micro motor 60 close to the installation box 51 and are inserted into the circuit board 52.

[0041] Importantly, the replacement mechanism 7 forms a replacement position 10 on the rotation path of the syringe barrel 8. When the rotating disk 4 is rotated, several syringe barrels 8 pass through the replacement position 10 in sequence, so that the needle heads 102 can be automatically disassembled and assembled at the replacement position 10. The replacement mechanism 7 includes an upper clamping component and a lower clamping component arranged at the replacement position 10. The upper clamping component 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 barrel 8 is formed between the two. The lower clamping component 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 between the two. Corresponding to each syringe barrel 8, an opening 500 can be coaxially arranged on the upper cover 5 to facilitate the operation of the pen body 101.

[0042] It can be understood that when the syringe barrel 8 is clamped in the upper elastic clamping opening, it can rotate self - sufficiently. The lower clamping component is arranged on the second gear 62 and rotates synchronously with it. When the linkage column 80 is clamped in the lower elastic clamping opening, it rotates synchronously with the second gear 62. With such a setting, by rotating the rotating disk 4, any syringe barrel 8 can be stopped at the replacement position 10. Then, the pen body 101 is aligned with the needle head 102 in the syringe barrel 8. Next, the drive mechanism 6 is driven to make the second gear 62 rotate, driving the syringe barrel 8 to rotate, driving the needle head 102 to rotate. At the same time, by controlling the forward and reverse rotation of the micro - motor 60, the needle head 102 and the pen body 101 are screwed together or disassembled, thus realizing the automatic disassembly and assembly of the needle head 102, improving the safety of user use. And the used needle heads 102 can be temporarily stored in the syringe barrel 8 for unified treatment, avoiding environmental pollution caused by random discard.

[0043] Secondly, different types or specifications of needle heads can be stored in the syringe barrel 8. For the convenience of distinction, corresponding marks can also be made on the upper cover 5.

[0044] In addition, by setting the upper elastic clamping opening and the lower elastic clamping opening, when the syringe barrel 8 rotates into the replacement position 10, a gear - shifting effect can be formed, so that the user can clearly feel that the syringe barrel 8 has rotated in place.

[0045] It can be understood that there is a gap between the upper end surface of the syringe barrel 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 thickness of the protective film 1020 is thin, usually the gap only needs to be 0.2mm - 0.5mm.

[0046] In some embodiments, the mounting bracket 30 is provided with a mounting plate 300 facing the replacement position 10. The first upper clamping block 70 is slidably arranged on the mounting plate 300 in the direction of the replacement position 10. One end of the first upper clamping block 70 away from the second upper clamping block 71 is provided with the first elastic member 72. The second upper clamping block 71 is fixed to the base 3. Under the action of the first elastic member 72, an upper elastic clamping opening is formed between the first upper clamping block 70 and the second upper clamping block 71.

[0047] Secondly, as Figure 7 shown, one end of the first upper clamping block 70 close to the mounting plate 300 is provided with a cross-shaped sliding rod portion 7000 and positioning rod portions 7001 on both sides of the sliding rod portion 7000. An installation frame is arranged on the mounting plate 300. The sliding rod portion 7000 is slidably arranged in the installation frame, and the positioning rod portions 7001 are abutted against both sides of the installation frame. With such a setting, the movement range of the first upper clamping block 70 is effectively controlled, the stability of the movement of the first upper clamping block 70 is improved, and the stability of the installation of the first elastic member 72 is also ensured. A cover plate should be arranged on the installation frame.

[0048] In some other embodiments, the first elastic member 72 is arranged on the rear sides of both the first upper clamping block 70 and the second upper clamping block 71 or only on the rear side of the second upper clamping block 71 to fix the first upper clamping block 70. However, the first solution is the preferred one as the structure is simpler and makes the structure of the needle seat 2 more compact.

[0049] In some embodiments, a first movable cavity 620 and a second movable cavity 621 are arranged on the upper end surface of the second gear 62. The first lower clamping block 73 is slidably arranged in the first movable cavity 620 towards the linkage column 80, and the second lower clamping block 74 is slidably arranged in the second movable cavity 621 towards the linkage column 80. The rear ends of both the first lower clamping block 73 and the second lower clamping block 74 are provided with the second elastic member 75. And under the action of the second elastic member 75, a lower elastic clamping opening is formed between the first lower clamping block 73 and the second lower clamping block 74.

[0050] It can be understood that as Figure 7 shown, a limiting structure needs to be arranged between the first lower clamping block 73 and the first movable cavity 620 and between the second lower clamping block 74 and the second movable cavity 621 to limit the movement range of the two lower clamping blocks. The specific structure will not be elaborated in detail.

[0051] In some other embodiments, either the first lower clamping block 73 or the second lower clamping block 74 can be fixed.

[0052] In some embodiments, an upper clamping portion 700 adapted to the outer wall of the syringe 8 is provided on one side of the first upper clamping block 70 close to the second upper clamping block 71, and a lower clamping portion 701 adapted to the outer wall of the linkage column 80 is provided on one side of the first lower clamping block 73 close to the second lower clamping block 74. First guiding ports 76 are provided at both ends of the upper elastic clamping opening on the rotation path of the syringe 8, and second guiding ports 77 are provided at both ends of the lower elastic clamping opening on the rotation path of the syringe 8. Specifically, arc-shaped 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 the first guiding ports 76, and the same applies to the first lower clamping block 73 and the second lower clamping block 74. With such a setting, the syringe 8 and the linkage column 80 can be smoothly rotated into or out of the replacement position 10.

[0053] In some embodiments, two opposite sides of the linkage column 80 in the moving direction of the first upper clamping block 70 are set as planes. A positioning groove 11 is provided 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. With such a setting, it can be avoided that the syringe 8 rotates when the turntable 4 rotates. It should be understood that the driving mechanism 6 needs to be set to rotate exactly an integer number of turns to bolt-lock the pen body 101 and the needle 102, so as to ensure that the linkage column 80 is rotated into the lower elastic clamping opening at the correct position.

[0054] In some embodiments, arc-shaped tracks 110 extend upward from the upper parts of the two ports towards the linkage column 80. The arc-shaped tracks 110 are arranged along the rotation path of the linkage column 80 and are misaligned with the syringe 8. The distance between the end of the arc-shaped track 110 and the linkage column 80 is less than the diameter of the linkage column 80. With such a setting, it is further ensured that the linkage column 80 smoothly and correctly rotates into the lower elastic clamping opening. At the same time, even if the linkage column 80 is slightly deflected, the linkage column 80 can be adjusted.

[0055] In some embodiments, a cover taking mechanism is further included. The cover taking mechanism includes a first cover clamping block 12, a second cover clamping block 13, a lifting member 14 and a partition 15. A positioning convex block 1030 is provided on the outer wall of the protective cover 103. An installation 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. A through hole 801 communicating the inner cavity of the syringe 8 with 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 disposed in the channel 800. A limiting ring 142 is provided at one end of the rod portion 141 away from the umbrella-shaped portion 140. 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. The first cover clamping block 12 and the second cover clamping block 13 are respectively located on both sides of the umbrella-shaped portion 140 and are slidably disposed in the installation cavity 150 toward the umbrella-shaped portion 140. Preferably, a limiting structure is provided between the first cover clamping block 12 and the second cover clamping block 13 and the partition 15 to ensure the movement range and movement direction of the two. Usually, a matching positioning convex block and positioning groove can be used to achieve this.

[0056] Secondly, both the first cover clamping block 12 and the second cover clamping block 13 include a clamping portion 120 and a linkage portion 121. A positioning groove 122 adapted to the positioning convex block 1030 is provided on the inner wall of the clamping portion 120. A second spring 17 is provided between one end of the linkage portion 121 away from the umbrella-shaped portion 140 and the syringe 8. A conical surface 123 adapted to the umbrella-shaped portion 140 is provided at one end thereof 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. An activity groove 31 is provided on the base 3. The rotating disk 4 is slidably disposed up and down along the activity groove 31. A plurality of third springs 18 are provided between the lower end of the rotating disk 4 and the bottom of the activity 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 clamping block 12 and the second cover clamping block 13 release the clamping of the protective cover 103. With such a setting, the protective cover 103 can be automatically taken off, improving the use efficiency of the insulin injection pen.

[0057] In some embodiments, the cover taking mechanism further includes an isolation ring 19. The isolation ring 19 is disposed between the rotating disk 4 and the third spring 18. An arc-shaped abutting portion 190 is provided at the upper end of the isolation ring 19. With such a setting, the rotating disk 4 rotates more smoothly and is not blocked by the third spring 18. At the same time, the arc-shaped abutting portion 190 helps to reduce the wear of direct contact during rotation and prolong the service life of the component.

[0058] 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 slot 31 corresponding to the first positioning hole 191, which improves the stability of the third spring 18 and at the same time improves the simplicity and accuracy of the assembly process.

[0059] In some embodiments, a pen barrel 20 for placing the pen body 101 is provided above the replacement position 10 on the upper cover 5. The pen barrel 20 is communicated with the syringe barrel 8, and a second rotation limiting structure 21 is provided between the pen body 101 and the pen barrel 20, so that it is more convenient to automatically disassemble and assemble the needle head 102.

[0060] In some embodiments, the first rotation limiting structure 9 includes a first limiting block 90 provided on the inner wall of the syringe barrel 8 and a first limiting groove 91 provided on the outer wall of the needle head 102. The second rotation limiting structure 21 includes a second limiting block 210 provided on the inner wall of the pen barrel 20 and a second limiting groove 211 provided on the outer wall of the pen body 101. The number of the first limiting blocks 90 is the same as that of the second limiting blocks 210, and they are correspondingly arranged along the same straight line. Thus, when it is difficult to observe the second limiting block 210 on the inner wall of the syringe barrel 8 at the replacement position 10 due to the setting of the pen barrel 20, the second limiting block 210 on the pen barrel 20 can be used for alignment.

[0061] Preferably, the number of the first limiting blocks 90 is three and they are uniformly arranged along the circumferential direction on the inner wall of the syringe barrel 8. 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.

[0062] Preferably, a plurality of vertical ridges are uniformly provided on the outer circumference of the rotating disk 4 to facilitate reducing the operation difficulty of rotating the rotating disk 4.

[0063] In summary, when the user installs the needle head 102 for use, first load the needle head 102 into each syringe barrel 8. At this time, clamp the protective cover 103 between the first cover clamping block 12 and the second cover clamping block 13. Then, tear off the protective film 1020 on the needle head 102 that needs to be transferred to the replacement position 10 in advance. Then rotate the rotating disk 4 to transfer the syringe barrel 8 corresponding to the needle head 102 into the upper elastic clamping opening, and at the same time, the linkage column 80 is transferred into the lower elastic clamping opening. Then insert the pen body 101 into the pen barrel 20. Then drive the first gear 61 to rotate through the micro motor 60, drive the second gear 62 to rotate, and drive the syringe barrel 8 to rotate through the linkage column 80, so that the needle head 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 manually remove it.

[0064] When the user finishes using the detachable needle 102, first reinsert the injection pen body 1 into the pen barrel 20 and the syringe 8, and then reverse the micro motor 60 to disassemble the needle 102 from the pen body 101.

[0065] After that, rotate the rotating disk 4 and repeat the foregoing operation to replace the corresponding needle 102.

[0066] 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 clamping block 12 and the second cover clamping block 13 release the clamping of the protective cover 103, so that all the needles 102 can be poured out.

[0067] It can be understood that in this specification, each spring and elastic member is preferably a compression spring.

[0068] In summary, after reading this detailed disclosure, those skilled in the art can understand that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated here, those skilled in the art can understand 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 this application and are within the spirit and scope of the exemplary embodiments of this application.

[0069] In addition, it should be understood that in the foregoing description of the embodiments of this application, for the purpose of helping to understand a feature and for the purpose of simplifying this application, this 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 this application, those skilled in the art may very well mark out some of the devices as separate embodiments for understanding. That is to say, the embodiments in this application can also be understood as the integration of multiple sub-embodiments. And it is also established when the content of each sub-embodiment is less than all the features of a single foregoing disclosed embodiment.

[0070] Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed in this application are only by way of example and not restrictive. Those skilled in the art can adopt alternative configurations according to the embodiments in this application to implement the application in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in this 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) and an upper cover (5); the rotating disk (4) is rotatably arranged on the base (3), and a plurality of mounting holes (40) are evenly arranged on the upper surface along the circumference; a syringe (8) for placing the needle (102) is rotatably arranged in the mounting hole (40), and 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 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).

2. An insulin injection pen according to claim 1, characterized in that: The needle seat (2) further comprises a driving mechanism (6) and a replacement mechanism (7); a first rotation limiting structure (9) is provided between the needle (102) and the syringe (8), so that the two rotate synchronously; 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.

3. An insulin injection pen according to claim 2, 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).

4. An insulin injection pen according to claim 3, 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).

5. An insulin injection pen according to claim 4, 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).

6. An insulin injection pen according to claim 5, 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).

7. An insulin injection pen according to claim 6, 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).

8. An insulin injection pen according to claim 1, 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 2, 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.

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