Syringes that can deliver a fixed amount of fluid

Abstract

The invention provides a syringe capable of quantitatively outputting fluid, comprising: a shell, a needle, an elastic joint, a medicine storage bottle, a piston, and a dosage adjustment unit. The elastic joint comprises: a mounting component, a sliding joint slidably mounted in the mounting component, and a first elastic component mounted in the mounting component and having two ends respectively restricted by the mounting component and the sliding joint. The dosage adjustment unit comprises: a scale indicator disk, a first rotating cylinder, a second rotating cylinder, a third rotating cylinder, a revolving component, a push rod, a first clutch gear, a second clutch gear, a transmission component, a second elastic component, a third elastic component, a bottle holder, and a tail cap. The invention can vertically inject into the skin, is easy to use, and can reduce the user's fear of injections. The dosage accuracy of each injection is more accurate, the structure is simple and compact, and the various components are easy to process and install.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a syringe capable of quantitatively outputting fluid. Background Art

[0002] With the aging of the population and the change of lifestyle, diabetes has changed from a rare disease to an epidemic. Currently, the main method for treating diabetes is to inject insulin, which usually requires a syringe to administer the drug. When injecting with existing syringes, the user experience is not good because people usually pinch the skin and insert the needle diagonally into the skin, and they are generally afraid of needles. In addition, the structure of the existing syringe for adjusting the dosage is not very convenient to process, and the fixing of the medicine storage bottle may sometimes be slightly loose, which will affect the injection dosage. Summary of the invention

[0003] The present invention is made to solve the above-mentioned problems, and its purpose is to provide a syringe that can vertically inject into the skin, is easy to use, and can reduce the user's fear of injections. The dosage accuracy of each injection is more accurate, the structure is simple and compact, and the various parts are easy to process and install. Can quantitatively output fluid.

[0004] The present invention provides a syringe capable of quantitatively outputting fluid, characterized in that it comprises:

[0005] A housing, comprising a first housing, a second housing and a cover, wherein the first housing is provided with a first visible window, one end of the second housing is connected to the first housing, and the other end is a needle connection end, and the cover is covered on the second housing;

[0006] A needle, mounted on the needle connection end of the second housing;

[0007] The elastic joint comprises: a hollow columnar mounting member mounted on the needle connecting end of the second housing, a hollow columnar sliding joint mounted in the mounting member and slidingly mounted in the mounting member along the axial direction of the mounting member, and a first elastic member mounted in the mounting member and having two ends respectively restricted by the mounting member and the sliding joint, wherein the mounting member is mounted at the needle connecting end of the second housing, and the sliding distance of the sliding joint is such that when the needle is not in use, the needle is located in the sliding joint, and when the sliding joint slides to the maximum distance in the direction of the needle, the distance of the needle extending out just meets the depth required to be inserted into the skin;

[0008] A medicine storage bottle, installed in the second shell;

[0009] A piston is slidably mounted in the medicine storage bottle; and

[0010] The dosage adjustment unit comprises: a scale indicator plate installed in the first housing, a first rotating drum, a second rotating drum, a third rotating drum, a rotating member, a push rod, a first clutch gear, a second clutch gear, a transmission member, a second elastic member, a third elastic member, a bottle holder, and a tail cap.

[0011] A first one-way meshing tooth is disposed on the inner side of one end of the first rotating drum, a first limiting member is disposed on the inner side wall of the other end, at least one first groove is disposed on the inner side wall of the first rotating drum along the axial direction, a first thread is disposed on the outer side wall of the first rotating drum, and a scale value is disposed on the outer side wall of the first rotating drum.

[0012] The inner side wall of the scale indicator plate is provided with a second thread matching the first thread.

[0013] The second rotating drum has a first meshing tooth disposed on an outer side wall at one end, a pair of first sliding holes disposed axially on a side wall at the other end, at least one first ridge disposed axially on an inner side wall of the second rotating drum, and a third thread disposed on an outer side of the second rotating drum.

[0014] The third rotating drum is provided with a first mounting end at one end, two second ridges are axially arranged on the inner side wall of the first mounting end, a plurality of third ridges are axially arranged on the outer side wall of the first mounting end, a pair of inverted hooks matching the first sliding hole are provided at the other end of the third rotating drum, and a second groove matching the first ridge is axially arranged on the outer side wall of the third rotating drum.

[0015] The revolving member is a hollow incomplete or complete column with a cross-sectional arc greater than 180°, the inner side wall of the revolving member is provided with a fourth thread matching the third thread on the outer side of the second rotating drum, and the outer side wall of the revolving member is axially provided with a fourth ridge matching the first groove,

[0016] The push rod is provided with a fourth thread, and the push rod is axially provided with two third grooves respectively matching the two second convex ridges.

[0017] The first clutch gear is a hollow cylinder, one side of the first clutch gear is provided with a second one-way meshing tooth matching the first one-way meshing tooth, and the other side of the first clutch gear is provided with a second meshing tooth matching the first meshing tooth.

[0018] The second clutch gear is a hollow cylinder, a third one-way meshing tooth is arranged on one side of the second clutch gear, and a plurality of fourth grooves matching the third convex ridges are arranged on the inner side wall of the second clutch gear.

[0019] The transmission member is a hollow cylinder with a bottom, and the bottom of the transmission member is provided with a first through hole, and the inner side surface of the bottom of the transmission member is provided with a fourth one-way meshing tooth matching the third one-way meshing tooth,

[0020] The bottle holder is a hollow cylinder with a bottom, a second through hole is provided at the bottom of the bottle holder, a hollow first mounting column is provided inside the bottom of the bottle holder, the center axis of the first mounting column coincides with the center axis of the second through hole, at least one circle of fifth threads matching with the fourth threads on the push rod is provided on the inner side wall of the first mounting column, and a fourth elastic member is provided outside the bottom of the bottle holder.

[0021] The tail cap is mounted on the first rotating drum, and a fifth circumferential groove is provided on the outer side wall of one end of the tail cap mounted on the first rotating drum.

[0022] The bottle holder is installed in one end of the second shell body facing the first shell body, the fourth elastic member is in contact with the bottom of the medicine storage bottle, the end of the bottle holder facing away from the second shell body is installed in the transmission member, the second clutch gear is located in the bottle holder and the third one-way meshing tooth is meshed with the fourth one-way meshing tooth of the transmission member, the first mounting end of the third rotating cylinder is installed in the transmission member, the second clutch gear sleeve is arranged on the first mounting end of the third rotating cylinder, the fourth groove of the second clutch gear sleeve is matched with the third convex ridge of the third rotating cylinder, the second elastic member is clamped between the inner side of the bottom of the bottle holder and the second clutch gear, one end of the push rod is installed in the mounting end of the third rotating cylinder, and the other end extends from the first mounting column of the bottle holder, the push rod is threadedly connected to the second mounting column of the bottle holder, the third groove of the push rod is matched with the second convex ridge of the third rotating cylinder, the second rotating cylinder is sleeved in the The gear train of claim 1, wherein the first gear train is an assembly of a plurality of gears and a plurality of gears, and the plurality of gears are coupled to the gear train of the plurality of gears. The gear train comprises a plurality of gears, each of which is a plurality of gears having a plurality of gears, and a plurality of gears having a plurality of gears. The plurality of gears are coupled to the gear train of the plurality of gears. The plurality of gears are coupled to the gear train of the plurality of gears.

[0023] The tooth direction of the second one-way meshing tooth and the second meshing tooth of the first clutch gear is designed so that, when the dose is set, the first rotary drum is rotated by an external force, and the first one-way meshing tooth of the first rotary drum slides over the tooth back of the second one-way meshing tooth of the first clutch gear, or the second meshing tooth of the first clutch gear slides over the tooth back of the first meshing tooth of the second rotary drum.

[0024] The tooth direction design of the third one-way meshing tooth of the second clutch gear enables the third one-way meshing tooth of the second clutch gear to slide over the tooth back of the fourth one-way meshing tooth of the transmission member when the third rotating drum rotates to drive the second clutch gear to rotate.

[0025] Furthermore, the syringe capable of quantitatively outputting fluid provided by the present invention may also have the following feature: a second visible window and scale lines are provided on the second shell.

[0026] Furthermore, in the syringe capable of quantitatively outputting fluid provided by the present invention, the following features may also be provided: at least one axially arranged second sliding hole is provided on the side wall of the mounting member, at least one axially arranged sixth groove is provided on the inner side wall of the mounting member, a circle of fifth ridges is provided on the inner side wall of the mounting member facing the second shell, the sliding joint is provided with the same number of first sliding blocks corresponding to the second sliding holes and the same number of sixth ridges corresponding to the sixth grooves, the sliding joint is provided with a bottom side surface at the end facing away from the mounting member, the bottom side surface is provided with a third through hole, the first elastic member is sandwiched between the fifth ridge and the bottom side surface, the first sliding block is slidably installed in the corresponding second sliding hole, and the sixth ridge is slidably installed in the corresponding sixth groove.

[0027] Furthermore, in the syringe capable of quantitatively outputting fluid provided by the present invention, it may also have the following characteristics: a circle of first circular protrusions is provided on the outer side of the second shell body near the needle connection end, and at least two mounting grooves are provided on the side wall of the first protrusion, the mounting grooves include a seventh groove arranged circumferentially and an eighth groove connected to the seventh groove and forming an angle with the axial direction, the direction of the angle formed by the eighth groove and the central axis of the first protrusion is such that the angle between the seventh groove and the eighth groove is greater than 90 degrees, a stopper is provided at one end of the seventh groove facing the eighth groove, and second protrusions having the same number as the mounting grooves and matching the mounting grooves are provided at one end of the inner side wall of the mounting component facing the second shell body, and when the mounting component is installed on the second shell body, the second protrusion enters the eighth groove through the seventh groove.

[0028] Furthermore, in the syringe capable of quantitatively outputting fluid provided by the present invention, the syringe may also have the following feature: a silicone sheet is provided on the end surface of the sliding joint facing away from the mounting component.

[0029] Furthermore, in the syringe capable of quantitatively outputting fluid provided by the present invention, the following features may also be provided: a hollow second mounting column is provided on the end of one end of which the first sliding hole is provided, the tail cap is installed on one end of the first rotating cylinder and provided with a ninth groove, a sliding rod corresponding to the second mounting column is provided in the ninth groove, a third elastic member is sleeved on the second mounting column, and the sliding rod slides and extends into the second mounting column.

[0030] Furthermore, in the syringe capable of quantitatively outputting fluid provided by the present invention, it may also have the following feature: a second limiting member is provided at one end of the first rotating cylinder facing the tail cap, and a second limiting groove corresponding to the second limiting member is provided at one end of the scale indicator disk facing the tail cap.

[0031] Furthermore, in the syringe capable of quantitatively outputting fluid provided by the present invention, the following features may be provided: the revolving member is a hollow incomplete column with an arc of the cross section greater than 180°, and third limiting members are respectively provided on the outer wall of the second rotating cylinder at both ends of the third thread.

[0032] Furthermore, in the syringe capable of quantitatively outputting fluid provided by the present invention, it may also have the following feature: the angle between the barb and the side wall surface of the third rotating cylinder is less than 90 degrees.

[0033] The present invention has the following advantages:

[0034] The syringe capable of quantitatively outputting fluids of the present invention has an elastic joint designed so that the user can inject vertically through the skin, which is convenient to use and can reduce the user's fear of injections; the bottle holder is designed so that the medicine storage bottle can be fixed more firmly to avoid inaccurate injection dosage caused by loose medicine storage bottle; the dosage adjustment unit is designed so that the structure is simple and compact, and the various parts are easy to process and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the external structure of a syringe capable of quantitatively outputting fluid in an embodiment of the present invention;

[0036] Figure 2 is a schematic structural diagram of a syringe capable of quantitatively outputting fluid in an embodiment of the present invention when in use;

[0037] Figure 3 is a schematic structural diagram of a syringe capable of quantitatively outputting fluid in an embodiment of the present invention after removing a first shell and a cover body;

[0038] Figure 4 yes Figure 3 AA section view;

[0039] Figure 5 yes Figure 3 Explosion diagram of

[0040] Figure 6 Schematic diagram of the installation component in the embodiment of the present invention Figure 1 ;

[0041] Figure 7 Schematic diagram of the installation component in the embodiment of the present invention Figure 2 ;

[0042] Figure 8 is a schematic structural diagram of a sliding joint in an embodiment of the present invention;

[0043] Fig. 9 is a schematic structural diagram of a second housing in an embodiment of the present invention;

[0044] Fig.10 is a schematic structural diagram of a dial in an embodiment of the present invention;

[0045] Fig.11 The structure of the first drum in the embodiment of the present invention is schematically shown in FIG. Figure 1 ;

[0046] Fig.12 The structure of the first drum in the embodiment of the present invention is schematically shown in FIG. Figure 2 ;

[0047] Fig.13 is a schematic structural diagram of a second rotating drum in an embodiment of the present invention;

[0048] Fig.14 is a schematic structural diagram of a first clutch gear in an embodiment of the present invention;

[0049] Fig.15 is a diagram of the coordination of the second rotating drum, the revolving member and the first clutch gear in an embodiment of the present invention;

[0050] Fig.16 is a schematic structural diagram of a tail cap in an embodiment of the present invention;

[0051] Fig.17 is a schematic structural diagram of a third rotating drum in an embodiment of the present invention;

[0052] Fig.18 is a schematic structural diagram of a second clutch gear in an embodiment of the present invention;

[0053] Fig.19 is a schematic structural diagram of a transmission component in an embodiment of the present invention;

[0054] Fig. 20 Schematic diagram of the structure of the bottle holder in the embodiment of the present invention. DETAILED DESCRIPTION

[0055] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically illustrate the syringe capable of quantitatively outputting fluid of the present invention.

[0056] like Figure 1-5 As shown, the syringe 100 capable of quantitatively outputting fluid comprises: a housing 10 , a needle 20 , an elastic joint 30 , a medicine storage bottle 40 , a piston 50 , and a dosage adjustment unit 60 .

[0057] The housing 10 includes a first housing 11, a second housing 12 and a cover 13. A first visible window 111 is provided on the first housing 11. One end of the second housing 12 is connected to the first housing 11, and the other end is a needle connection end. In this embodiment, a second visible window 123 and a scale mark are provided on the second housing 12. The cover 13 covers the second housing 12. Specifically, the cover 13 and the second housing 12 are provided with mutually matching buckling components, and the cover 13 is buckled on the second housing 12.

[0058] The needle 20 is mounted on the needle connection end of the second housing 12. In this embodiment, the needle connection end of the second housing 12 is provided with a thread, and the needle 20 is threadedly connected to the needle connection end of the second housing 12.

[0059] The elastic joint 30 is installed at the needle connection end of the second shell 12 to cover the needle 20. When used by the user, the joint of the syringe can be inserted vertically into the skin to avoid the need to pierce the skin obliquely and pinch the skin of the part to be pierced with the other hand when the needle is directly used, and it can reduce the user's fear of injections. The elastic joint 30 includes: a mounting member 31, a sliding joint 32 and a first elastic member 33. The mounting member 31 is installed at the needle connection end of the second shell 12, and the mounting member 31 is a hollow column. The sliding joint 32 is a hollow column, and the sliding joint 32 is installed in the mounting member 31 along the axial sliding of the mounting member 31. The first elastic member 33 is installed in the mounting member 31, and the two ends of the first elastic member 33 are respectively restricted by the mounting member 31 and the sliding joint 32. The mounting member 31 is installed at the position of the needle connection end of the second shell 12, and the sliding distance of the sliding joint 32 is sufficient to ensure that the needle 20 is located inside the sliding joint 32 when not in use, that is, the needle 20 is not exposed outside the sliding joint 32. When the sliding joint 32 slides to the maximum distance in the direction of the needle 20, the extended distance of the needle 20 just meets the depth required to penetrate the skin.

[0060] In this embodiment, if Figure 6, Figure 7 As shown, at least one axially arranged second sliding hole 311 is provided on the side wall of the mounting member 31. Specifically, the second sliding holes 311 are arranged at equal angles, and more specifically, two second sliding holes 311 are arranged at an interval of 180°. At least one axially arranged sixth groove 312 is provided on the inner side wall of the mounting member 31. Specifically, the sixth grooves 312 are arranged at equal intervals, and more specifically, two sixth grooves 312 are arranged at an interval of 180°. The two second sliding holes 311 and the two sixth grooves 312 are arranged alternately, and the interval between adjacent sixth grooves 312 and second sliding holes 311 is 90°. A circle of fifth ridges 313 is provided on one end of the inner side wall of the mounting member 31 facing the second shell 12. As shown Figure 8 As shown, the sliding joint 32 is provided with the same number of first sliders 321 as the second sliding holes 311 and the same number of sixth ridges 322 as the sixth grooves 312 and the sixth grooves 312. Specifically, the first sliders 321 are located at the end of the sliding joint 32 facing the second housing 12. The end of the sliding joint 32 facing away from the mounting member 31 is provided with a bottom side surface 323, and the bottom side surface 323 is provided with a third through hole 324. The first elastic member 33 is sandwiched between the fifth ridge 313 and the bottom side surface 323. The first sliders 321 are slidably mounted in the corresponding second sliding holes 311, and the sixth ridges 322 are slidably mounted in the corresponding sixth grooves 312.

[0061] In this embodiment, if Fig. 9As shown, a circle of first protrusions 121 are arranged on the outer side of the second housing 12 near the needle connection end, and at least two mounting grooves 122 are arranged on the side wall of the first protrusion 121, and the mounting grooves 122 include a seventh groove 1221 and an eighth groove 1222. The seventh groove 1221 is arranged along the circumference of the first protrusion 121, and the eighth groove 1222 forms an angle with the central axis of the first protrusion 121. The direction of the angle formed by the eighth groove 1222 and the central axis of the first protrusion 121 makes the angle between the seventh groove 1221 and the eighth groove 1222 greater than 90 degrees. A stopper 1223 is arranged at one end of the seventh groove 1221 facing the eighth groove 1222, and the stopper 1223 is used to prevent the mounting member 31 from easily falling off the second housing 12 after being installed on the second housing 12. A second protrusion 314 having the same number as the mounting grooves 122 and matching the mounting grooves 122 is arranged at one end of the inner side wall of the mounting member 31 facing the second housing 12. When the mounting member 31 is mounted on the second housing 12, the second protrusion 314 enters the eighth groove 1222 through the seventh groove 1221. The arrangement of the mounting groove 122 and the second protrusion 314 makes it very easy to mount the elastic joint 30 on the second housing 12, and very easy to disassemble, which is convenient for patients to use. Specifically, the mounting grooves 122 are arranged at equal angles, and a total of four mounting grooves 122 are arranged on the side wall of the first protrusion 121.

[0062] In this embodiment, a silicone sheet 34 is provided on the end surface of the sliding joint 32 facing away from the mounting member 31, that is, a silicone sheet 34 is provided on the bottom side 323. The silicone sheet 34 is provided so that when the bottom side 323 of the sliding joint 32 contacts the skin, the silicone sheet 34 contacts the skin well, and the user experience is good.

[0063] The medicine storage bottle 40 is installed in the second shell 12, and the piston 50 is slidably installed in the medicine storage bottle 40.

[0064] The dosage adjustment unit 60 includes: a scale indicator disk 601, a first rotating drum 602, a second rotating drum 603, a third rotating drum 604, a rotating member 605, a push rod 606, a first clutch gear 607, a second clutch gear 608, a transmission member 609, a second elastic member 610, a third elastic member 611, a bottle holder 612, and a tail cap 613.

[0065] like Fig.10As shown, the scale indicator plate 601 is installed in the first housing 11, and the inner side wall of the scale indicator plate 601 is provided with a second thread 6011. Specifically, the scale indicator plate 601 is provided with a third visual window 6012, and the third visual window 6012 is provided with a pointer. A seventh ridge 6013 is provided on the outer side wall of the scale indicator plate 601, and a tenth groove (not shown in the figure) matching the seventh ridge 6013 is provided on the inner side wall of the first housing 11, and an eighth ridge 6014 matching the first visual window 111 is provided on the third visual window 6012. During installation, the seventh ridge 6013 matches the tenth groove, and the eighth ridge 6014 matches the first visual window 111. After the scale indicator plate 601 is installed in the first housing 11, it will not move relative to the first housing 11.

[0066] like Fig.11 , Fig.12 As shown, a first one-way meshing tooth 6021 is provided inside one end of the first rotating drum 602, and a first position-limiting member 6022 is provided on the inner side wall of the other end. Specifically, the first position-limiting member 6022 is a circle of convex ridges. At least one first groove 6023 is provided axially on the inner side wall of the first rotating drum, and a first thread 6024 is provided on the outer side wall of the first rotating drum 602. The first thread 6024 matches the second thread 6011. The scale indicator disk 601 is sleeved on the first rotating drum 602 and is threadedly connected to the first rotating drum 602. The first rotating drum 602 can move relative to the scale indicator disk 601 when rotating, that is, it can be rotated in or out relative to the first housing 11. The outer side wall of the first rotating drum 602 is provided with a scale value. When the first rotating drum 602 rotates, the dose of the injected medicine can be known through the first visual window 111 and the third visual window 6012.

[0067] In this embodiment, a second limiting member 6025 is provided at one end of the first rotating drum 602 facing the tail cap 613, and a second limiting groove 6015 corresponding to the second limiting member 6025 is provided at one end of the scale indicator plate 601 facing the tail cap 613. When the first rotating drum 602 rotates and screws into the first housing 11, the depth of the first rotating drum 602 is limited, so that the first rotating drum 602 is rotated out each time and then rotated back to the same position.

[0068] like Fig.13 As shown, a first meshing tooth 6031 is disposed on the outer side wall of one end of the second rotating cylinder 603, a pair of first sliding holes 6032 are axially disposed on the side wall of the other end, and at least one first convex ridge 6033 is axially disposed on the inner side wall of the second rotating cylinder 603. Specifically, the first convex ridges 6033 are disposed at equal angles, and more specifically, there are two first convex ridges 6033. A third thread 6034 is disposed on the outer side of the second rotating cylinder.

[0069] The swirling member 605 is a hollow incomplete or complete column with a cross-sectional curvature greater than 180°. The inner side wall of the swirling member 605 is provided with a fourth thread (not shown) matching the third thread 6034 outside the second rotating drum 603, and the outer side wall of the swirling member 605 is axially provided with a fourth convex ridge 6051 matching the first groove 6023. In the present embodiment, the swirling member 605 is a hollow incomplete column with a cross-sectional curvature greater than 180°. The outer side wall of the second rotating drum 603 is respectively provided with a third limiting member 6036 at both ends of the third thread 6034. The third limiting member 6036 limits the distance of the swirling member 605 moving spirally on the second rotating drum 603.

[0070] like Fig.14 As shown, the first clutch gear 607 is a hollow cylinder, one side of the first clutch gear 607 is provided with a second one-way meshing tooth 6071 matching the first one-way meshing tooth 6021, and the other side is provided with a second meshing tooth 6072 matching the first meshing tooth 6031. Specifically, the second meshing teeth 6072 can be only a few that can match the first meshing teeth 6031.

[0071] like Fig.15 As shown, the swiveling member 605 is sleeved on the third threaded portion of the second rotating drum 603 and is threadedly connected to the second rotating drum 603, and the fourth convex ridge 6051 cooperates with the first groove 6023. When the first rotating drum 602 rotates relative to the second rotating drum 603, the first rotating drum 602 drives the swiveling member 605 to rotate relative to the second rotating drum 603 and move relative to the first groove 6023. The first clutch gear 607 is sleeved on the first meshing tooth end of the second rotating drum 603, and the second meshing teeth 6072 of the first clutch gear 607 mesh with the first meshing teeth 6031 of the second rotating drum 603. The first rotating drum 602 is sleeved on the second rotating drum 603, and the first one-way meshing teeth 6021 of the first rotating drum 602 mesh with the second one-way meshing teeth 6071 of the first clutch gear 607.

[0072] by Figure 3From the direction of rotation, the tooth direction of the second one-way meshing teeth 6071 and the second meshing teeth 6072 of the first clutch gear 607 is designed so that when the dose is set, when the first rotary drum 602 is driven by external force (i.e., the first rotary drum 602 is manually twisted) to rotate clockwise, the first one-way meshing teeth 6021 of the first rotary drum 602 slide over the tooth back of the second one-way meshing teeth 6071 of the first clutch gear 607, and cannot drive the first clutch gear 607 to rotate. When the first rotary drum 602 is driven by external force to rotate counterclockwise, the first one-way meshing teeth 6021 of the first rotary drum 602 mesh with the second one-way meshing teeth 6071 of the first clutch gear 607, the first rotary drum 602 drives the first clutch gear 607 to rotate, the second meshing teeth 6072 of the first clutch gear 607 slide over the tooth back of the first meshing teeth 6031 of the second rotary drum 603, and the first clutch gear 607 cannot drive the second rotary drum 603 to rotate. That is, when the first rotating drum 602 is driven by external force to rotate, no matter it is forward or reverse, it cannot drive the second rotating drum 603 to rotate.

[0073] The tail cap 613 is mounted on the first drum 602. Fig.16 As shown, the tail cap 613 is mounted on the outer side wall of one end of the first drum 602 and is provided with a circumferential fifth groove 6131. ​​After the tail cap 613 is mounted on the first drum 602, the first limiting member 6022 is located in the fifth groove 6131, and the first limiting member 6022 limits the tail cap 613 from sliding out of the first drum 602.

[0074] The third elastic member 611 is sandwiched between the tail cap 613 and the second rotating drum 603. The third elastic member 611 makes the second one-way meshing teeth 6071 of the first clutch gear 607 always mesh with or contact the first one-way meshing teeth 6021 of the first rotating drum 602, and the second meshing teeth 6072 of the first clutch gear 607 always mesh with or contact the first meshing teeth 6031 of the second rotating drum 603.

[0075] In this embodiment, if Fig.13 As shown, a hollow second mounting column 6035 is provided on the end of one end of the second rotating cylinder 603 where the first sliding hole is provided, and a ninth groove 6132 is provided on one end of the tail cap 613 installed on the first rotating cylinder 602, and a sliding rod 6133 corresponding to the second mounting column 6035 is provided in the ninth groove 6132, and the third elastic member 611 is sleeved on the second mounting column 6035, and the sliding rod 6133 slides into the second mounting column 6035.

[0076] like Fig.17As shown, a first mounting end 6045 is provided at one end of the third rotating cylinder 604, and two second ridges 6041 are axially provided on the inner side wall of the first mounting end 6045. A plurality of third ridges 6042 are axially provided on the outer side wall of the first mounting end. A pair of barbs 6043 matching the first sliding hole 6032 are provided at the other end of the third rotating cylinder 604, and a second groove 6044 matching the first ridge 6033 is axially provided on the outer side wall of the third rotating cylinder 604. The second rotating cylinder 603 is sleeved on the third rotating cylinder 604, and the barbs 6043 cooperate with the first sliding hole 6032 to limit the distance that the first rotating cylinder 602 is rotated outward, to ensure the maximum dose that can be injected by the syringe in a single time, and also to prevent the first rotating cylinder 602 from falling off the scale indicator disk 601 infinitely outward. The first ridge 6033 cooperates with the second groove 6044. The rotation of the second rotating cylinder 603 can drive the third rotating cylinder 604 to rotate.

[0077] In this embodiment, the angle between the undercut 6043 and the side wall of the third drum 604 is less than 90 degrees. Specifically, the angle is 40°-60°.

[0078] The push rod 606 is provided with a fourth thread, and the push rod 606 is axially provided with two third grooves (not shown in the figure) respectively matching with the two second convex ridges 6041 .

[0079] like Fig.18 As shown, the second clutch gear 608 is a hollow cylinder, and a third one-way meshing tooth 6081 is provided on one side of the second clutch gear 608. A plurality of fourth grooves 6082 matching the third convex ridges 6042 are provided on the inner side wall of the second clutch gear 608. Specifically, the fourth grooves 6082 are arranged at equal angles, the number of the third convex ridges 6042 can be different from the number of the fourth grooves 6082, and they do not need to be arranged at equal intervals, and the plurality of third convex ridges 6042 can be matched with the fourth grooves 6082 at the same time.

[0080] like Fig. 20 As shown, the bottle holder 612 is mounted on the second housing 12. It is used to fix the medicine storage bottle 40 in the second housing 12. The bottle holder 612 is a cylinder with a hollow bottom. The bottom of the bottle holder 612 is provided with a second through hole 6121. A hollow first mounting column 6122 is provided on the inner side of the bottom of the bottle holder. The central axis of the first mounting column 6122 coincides with the central axis of the second through hole 6121. The inner side wall of the first mounting column 6122 is provided with at least one circle of fifth threads 6123 that matches the fourth threads on the push rod 606. A fourth elastic member 6124 is provided on the outer side of the bottom of the bottle holder 612. The fourth elastic member 6124 is used to firmly fix the medicine storage bottle 40 in the second housing 12.

[0081] like Fig.19As shown, the transmission member 609 is mounted on the bottle holder 612. The transmission member 609 is a hollow cylinder with a bottom, and the bottom of the transmission member 609 is provided with a first through hole 6091, and the inner side surface of the bottom of the transmission member 609 is provided with a fourth one-way meshing tooth 6092 matching the third one-way meshing tooth 6081.

[0082] The first mounting end 6045 of the third rotating drum 604 is mounted in the transmission member 609. The second clutch gear 608 is sleeved on the first mounting end of the third rotating drum 604. The fourth groove 6082 of the second clutch gear 608 cooperates with the third convex ridge 6042 of the third rotating drum 604, so that the rotation of the third rotating drum 604 can drive the second clutch gear 608 to rotate. The second clutch gear 608 is meshed with the fourth one-way meshing teeth 6092 of the transmission member 609. The tooth direction design of the third one-way meshing teeth 6081 of the second clutch gear 608 makes it possible for the third one-way meshing teeth 6081 of the second clutch gear 608 to slide over the tooth back of the fourth one-way meshing teeth 6092 of the transmission member 609 when the third rotating drum 604 drives the second clutch gear 608 to rotate. The function of the second clutch gear 608 is that when the second clutch gear 608 rotates in the opposite direction (i.e., in the opposite direction to the direction driven by the third rotating drum 604), the third one-way meshing tooth 6081 meshes with the fourth one-way meshing tooth 6092 and cannot rotate in the opposite direction. Therefore, the design of the second clutch gear 608 ensures that the push rod 606 remains in the same position after each injection, thereby ensuring that the dose of each injection is the same as the set dose. The second elastic member 610 is sandwiched between the inner side of the bottom of the bottle holder 612 and the second clutch gear 608. The second elastic member 610 makes the second clutch gear 608 and the transmission member 609 always in a state of meshing or contact. One end of the push rod 606 is installed in the installation end of the third rotating drum 604, and the other end extends from the first installation column 6122 of the bottle holder 612. The push rod 606 is threadedly connected to the first installation column 6122 of the bottle holder 612. The third groove of the push rod 606 cooperates with the second ridge 6041 of the third rotating drum 604 , so that the rotation of the third rotating drum 604 can drive the push rod 606 to rotate.

[0083] In this embodiment, the first elastic member 33, the second elastic member 610, and the third elastic member 611 are all springs. The fourth elastic member is a structure made of rubber.

[0084] Working principle:

[0085] First, set the injection dose. Figure 3From the direction of rotation, the first rotating drum 602 is rotated clockwise, and the scale observed by the scale indicator disk 601 can be adjusted to the required injection dose. When the first rotating drum 602 rotates, the first one-way meshing tooth 6021 slides over the tooth back of the second one-way meshing tooth 6071 of the first clutch gear 607, and cannot drive the first clutch gear 607 to rotate. After adjusting the dose, the first rotating drum 602 is rotated upward, and the first rotating drum 602 drives the second rotating drum 603 to move upward. Since the first mounting end of the third rotating drum 604 is installed in the transmission member 609, the third rotating drum 604 will not move upward. When the set dose exceeds the dose required for this injection, the first rotating drum 602 can also be rotated counterclockwise to adjust the dose. When the first rotating drum 602 is rotated counterclockwise, the first one-way meshing tooth 6021 meshes with the second one-way meshing tooth 6071 of the first clutch gear 607, driving the first clutch gear 607 to rotate, and the second meshing tooth 6072 of the first clutch gear 607 slides over the tooth back of the first meshing tooth 6031, and cannot drive the second rotating drum 603 to rotate.

[0086] After setting the dose, start injecting. Figure 3 From the direction of rotation, the tail cap 613 is pressed downward, and the tail cap 613 pushes the second rotating drum 603 to move downward, and the second rotating drum 603 drives the first rotating drum 602 to move downward. When the first rotating drum 602 moves downward, it rotates downward counterclockwise (the first rotating drum 602 rotates downward under the mutual guidance of the first thread 6024 and the second thread 6011 of the scale indicator plate 601). Due to the force applied to the second rotating drum 603, the first rotating drum 602, the first clutch gear 607 and the second rotating drum 603 are meshed, and when the first rotating drum 602 rotates counterclockwise, the first rotating drum 602, the first clutch gear 607 and the second rotating drum 603 are always in the same position. The first rotating drum 602 is not separated in the meshing state, so the first rotating drum 602 can drive the first clutch gear 607 to rotate counterclockwise, the first clutch gear 607 drives the second rotating drum 603 to rotate counterclockwise, the second rotating drum 603 drives the third rotating drum 604 to rotate counterclockwise, the third rotating drum 604 drives the second clutch gear 608 and the push rod 606 to rotate, the second clutch gear 608 slides over the tooth back of the fourth one-way meshing tooth 6092 of the transmission component 609, and the push rod 606 rotates relative to the first mounting column 6122 of the bottle holder 612 (threaded connection), so the push rod 606 moves toward the direction of the medicine storage bottle 40, pushing the piston 50 to move, thereby injecting the medicine into the skin.

[0087] Since the process of setting the dose does not cause the push rod 606 to move, the push rod 606 pushes the piston 50 to move from the position of the last injection for each injection.

[0088] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A syringe capable of quantitatively outputting fluid, characterized in that: include: A housing, comprising a first housing, a second housing and a cover, wherein the first housing is provided with a first visible window, one end of the second housing is connected to the first housing, and the other end is a needle connection end, and the cover is covered on the second housing; A needle, mounted on the needle connection end of the second housing; The elastic joint comprises: a hollow columnar mounting member mounted on the needle connecting end of the second housing, a hollow columnar sliding joint mounted in the mounting member and slidingly mounted in the mounting member along the axial direction of the mounting member, and a first elastic member mounted in the mounting member and having two ends respectively restricted by the mounting member and the sliding joint, wherein the mounting member is mounted at the needle connecting end of the second housing, and the sliding distance of the sliding joint is such that when the needle is not in use, the needle is located in the sliding joint, and when the sliding joint slides to the maximum distance in the direction of the needle, the distance of the needle extending out just meets the depth required to be inserted into the skin; A medicine storage bottle, installed in the second shell; A piston is slidably mounted in the medicine storage bottle; and The dosage adjustment unit comprises: a scale indicator plate installed in the first housing, a first rotating drum, a second rotating drum, a third rotating drum, a rotating member, a push rod, a first clutch gear, a second clutch gear, a transmission member, a second elastic member, a third elastic member, a bottle holder, and a tail cap. A first one-way meshing tooth is disposed on the inner side of one end of the first rotating drum, a first limiting member is disposed on the inner side wall of the other end, at least one first groove is disposed on the inner side wall of the first rotating drum along the axial direction, a first thread is disposed on the outer side wall of the first rotating drum, and a scale value is disposed on the outer side wall of the first rotating drum. The inner side wall of the scale indicator plate is provided with a second thread matching the first thread. The second rotating drum has a first meshing tooth disposed on an outer side wall at one end, a pair of first sliding holes disposed axially on a side wall at the other end, at least one first ridge disposed axially on an inner side wall of the second rotating drum, and a third thread disposed on an outer side of the second rotating drum. The third rotating drum is provided with a first mounting end at one end, two second ridges are axially arranged on the inner side wall of the first mounting end, a plurality of third ridges are axially arranged on the outer side wall of the first mounting end, a pair of inverted hooks matching the first sliding hole are provided at the other end of the third rotating drum, and a second groove matching the first ridge is axially arranged on the outer side wall of the third rotating drum. The revolving member is a hollow incomplete or complete column with a cross-sectional arc greater than 180°, the inner side wall of the revolving member is provided with a fourth thread matching the third thread on the outer side of the second rotating drum, and the outer side wall of the revolving member is axially provided with a fourth ridge matching the first groove, The push rod is provided with a fourth thread, and the push rod is axially provided with two third grooves respectively matching the two second convex ridges. The first clutch gear is a hollow cylinder, one side of the first clutch gear is provided with a second one-way meshing tooth matching the first one-way meshing tooth, and the other side of the first clutch gear is provided with a second meshing tooth matching the first meshing tooth. The second clutch gear is a hollow cylinder, a third one-way meshing tooth is arranged on one side of the second clutch gear, and a plurality of fourth grooves matching the third convex ridges are arranged on the inner side wall of the second clutch gear. The transmission member is a hollow cylinder with a bottom, and the bottom of the transmission member is provided with a first through hole, and the inner side surface of the bottom of the transmission member is provided with a fourth one-way meshing tooth matching the third one-way meshing tooth, The bottle holder is a hollow cylinder with a bottom, a second through hole is provided at the bottom of the bottle holder, a hollow first mounting column is provided inside the bottom of the bottle holder, the center axis of the first mounting column coincides with the center axis of the second through hole, at least one circle of fifth threads matching with the fourth threads on the push rod is provided on the inner side wall of the first mounting column, and a fourth elastic member is provided outside the bottom of the bottle holder. The tail cap is mounted on the first rotating drum, and a fifth circumferential groove is provided on the outer side wall of one end of the tail cap mounted on the first rotating drum. The bottle holder is installed in one end of the second shell body facing the first shell body, the fourth elastic member is in contact with the bottom of the medicine storage bottle, the end of the bottle holder facing away from the second shell body is installed in the transmission member, the second clutch gear is located in the bottle holder and the third one-way meshing tooth is meshed with the fourth one-way meshing tooth of the transmission member, the first mounting end of the third rotating cylinder is installed in the transmission member, the second clutch gear sleeve is arranged on the first mounting end of the third rotating cylinder, the fourth groove of the second clutch gear sleeve is matched with the third convex ridge of the third rotating cylinder, the second elastic member is clamped between the inner side of the bottom of the bottle holder and the second clutch gear, one end of the push rod is installed in the mounting end of the third rotating cylinder, and the other end extends from the first mounting column of the bottle holder, the push rod is threadedly connected to the second mounting column of the bottle holder, the third groove of the push rod is matched with the second convex ridge of the third rotating cylinder, the second rotating cylinder is sleeved in the The gear train of claim 1, wherein the first gear train is an assembly of a plurality of gears and a plurality of gears, and the plurality of gears are coupled to the gear train of the plurality of gears. The gear train comprises a plurality of gears, each of which is a plurality of gears having a plurality of gears, and a plurality of gears having a plurality of gears. The plurality of gears are coupled to the gear train of the plurality of gears. The tooth direction of the second one-way meshing tooth and the second meshing tooth of the first clutch gear is designed so that, when the dose is set, the first rotary drum is rotated by an external force, and the first one-way meshing tooth of the first rotary drum slides over the tooth back of the second one-way meshing tooth of the first clutch gear, or the second meshing tooth of the first clutch gear slides over the tooth back of the first meshing tooth of the second rotary drum. The tooth direction design of the third one-way meshing tooth of the second clutch gear enables the third one-way meshing tooth of the second clutch gear to slide over the tooth back of the fourth one-way meshing tooth of the transmission member when the third rotating drum rotates to drive the second clutch gear to rotate.

2. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: The second shell is provided with a second visual window and scale lines.

3. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: At least one axially arranged second sliding hole is provided on the side wall of the mounting member, at least one axially arranged sixth groove is provided on the inner side wall of the mounting member, a circle of fifth ridges is provided on the inner side wall of the mounting member facing the second shell, the sliding joint is provided with the same number of first sliding blocks corresponding to the second sliding holes and the same number of sixth ridges corresponding to the sixth grooves, the sliding joint is provided with a bottom side surface at one end facing away from the mounting member, the bottom side surface is provided with a third through hole, the first elastic member is sandwiched between the fifth ridge and the bottom side surface, the first sliding block is slidably installed in the corresponding second sliding hole, and the sixth ridge is slidably installed in the corresponding sixth groove.

4. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: A circle of first circular protrusions is provided on the outer side of the second shell body near the needle connection end, and at least two installation grooves are provided on the side wall of the first protrusion, and the installation grooves include a seventh groove arranged circumferentially and an eighth groove connected to the seventh groove and forming an angle with the axial direction, and the direction of the angle formed by the eighth groove and the central axis of the first protrusion is such that the angle between the seventh groove and the eighth groove is greater than 90 degrees, and a stopper is provided at one end of the seventh groove facing the eighth groove, and second protrusions having the same number as the installation grooves and matching the installation grooves are provided on the inner side wall of the mounting component facing the second shell body, and when the mounting component is installed on the second shell body, the second protrusion enters the eighth groove through the seventh groove.

5. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: A silicone sheet is arranged on the end surface of the sliding joint at one end facing away from the mounting component.

6. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: A hollow second mounting column is provided on the end of one end of the second rotating cylinder where the first sliding hole is provided, and a ninth groove is provided on one end of the tail cap installed on the first rotating cylinder, a sliding rod corresponding to the second mounting column is provided in the ninth groove, a third elastic member is sleeved on the second mounting column, and the sliding rod slides and extends into the second mounting column.

7. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: A second limiting member is disposed at one end of the first rotating drum facing the tail cap, and a second limiting groove corresponding to the second limiting member is disposed at one end of the scale indicating plate facing the tail cap.

8. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: The revolving member is in the shape of a hollow incomplete column with a cross-section having an arc greater than 180°, and third limiting members are respectively provided on the outer side wall of the second rotating cylinder at both ends of the third thread.

9. The syringe capable of quantitatively outputting fluid according to claim 1, characterized in that: The undercut is an undercut with an angle of less than 90 degrees with the side wall surface of the third rotating drum.

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