CN217366768U - Syringe capable of quantitatively outputting fluid - Google Patents

Abstract

The utility model provides a can quantitative output fluidic syringe, include: casing, syringe needle, elastic joint, storage medicine bottle, piston, dose adjustment unit, elastic joint includes: a mounting member, a sliding joint slidably mounted in the mounting member, a first resilient member mounted in the mounting member with both ends constrained by the mounting member and the sliding joint, respectively, the dose setting unit comprising: scale dial, first rotary drum, second rotary drum, third rotary drum, the component that circles round, push rod, first clutch gear, second clutch gear, drive component, second elastic component, third elastic component, bottle support, tail cap, the utility model discloses can inject the skin perpendicularly, convenient to use to can reduce the user to the fear when injecing in the heart, the injection dosage precision is more accurate at every turn, and simple structure is compact, each spare part processing, simple to operate.

Description

Syringe for quantitative output of fluid

technical field

The utility model belongs to the technical field of medical devices, in particular to a syringe capable of quantitatively outputting fluid.

Background technique

With the aging of the population and changes in lifestyle, diabetes has gone from a rare disease to an epidemic. Currently, the main method of treating diabetes is insulin injection, which usually requires a syringe to be administered. When injecting the existing syringe, because people usually hold the skin needle and stick the needle obliquely into the skin when injecting, and are generally afraid of the needle, the user experience is not good. Moreover, the existing structure for adjusting the dose of the syringe is not very convenient to process, and sometimes there may be a little loosening in the fixation of the medicine storage bottle, which will affect the injected dose.

Utility model content

The purpose of the present invention is to solve the above problems, and the purpose is to provide a vertical injection into the skin, which is convenient to use, and can reduce the user's fear of injections. The precision of each injection is more accurate, and the structure is simple and compact. A syringe capable of quantitatively outputting fluid with easy parts processing and installation.

The utility model provides a syringe capable of quantitatively outputting fluid, which is characterized by comprising:

The casing includes a first casing, a second casing and a cover, a first visual window is arranged on the first casing, one end of the second casing is connected to the first casing, and the other end is connected to the first casing. is a needle connecting end, and the cover is covered on the second shell;

a needle, mounted on the needle connecting end of the second housing;

An elastic joint, comprising: a hollow cylindrical mounting member mounted on the needle connecting end of the second housing, a hollow cylindrical sliding joint mounted in the mounting member along the axial direction of the mounting member, and a hollow cylindrical sliding joint mounted on the mounting member. A first elastic member whose inner two ends are respectively restricted by the mounting member and the sliding joint, the mounting member is installed at the position of the needle connecting end of the second housing, and the sliding distance of the sliding joint satisfies When not in use, the needle is located in the sliding joint, and when the sliding joint is slid to the maximum distance in the direction of the needle, the needle protruding distance just meets the depth required to penetrate the skin;

a medicine storage bottle, installed in the second housing;

a piston slidably mounted within the storage bottle; and

A dose adjustment unit, comprising: a scale indicator plate installed in the first housing, a first drum, a second drum, a third drum, a revolving member, a push rod, a first clutch gear, a second clutch gear, Transmission member, second elastic member, third elastic member, bottle holder, tail cap,

The inner side of one end of the first drum is provided with a first one-way meshing tooth, the inner side wall of the other end is provided with a first limiting member, and the inner side wall of the first drum is axially provided with at least one first a groove, the outer side wall of the first drum is provided with a first thread, and the outer side wall of the first drum is provided with a scale value,

A second thread matching the first thread is provided on the inner side wall of the dial indicator,

The outer side wall of one end of the second drum is provided with first meshing teeth, the side wall of the other end is provided with a pair of first sliding holes in the axial direction, and the inner side wall of the second drum is axially provided with at least A first convex edge, the outer side of the second drum is provided with a third thread,

One end of the third rotating drum is provided with a first installation end, the inner side wall of the first installation end is provided with two second protruding ribs in the axial direction, and the outer side wall of the first installation end is arranged in the axial direction. There are a plurality of third convex edges, the other end of the third drum is provided with a pair of barbs that match the first sliding hole, and the outer side wall of the third drum is axially provided with the first rib matches the second groove,

The revolving member is a hollow incomplete or completely cylindrical shape with an arc of a cross section greater than 180°, and the inner side wall of the revolving member is provided with a fourth thread that matches the third thread on the outside of the second drum, so The outer side wall of the swivel member is axially provided with a fourth rib that matches the first groove,

The push rod is provided with a fourth thread, and the push rod is axially provided with two third grooves which are respectively matched with the two second convex edges,

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 is provided with a second one-way meshing tooth matching the first one-way meshing tooth. a meshing tooth matched with a second meshing tooth,

The second clutch gear is a hollow cylinder, one side of the second clutch gear is provided with a third one-way meshing tooth, and the inner side wall of the second clutch gear is provided with a plurality of ridges corresponding to the third ridges. to match the fourth groove,

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 of the bottom of the transmission member is provided with a first through hole matching the third one-way meshing teeth. Four unidirectional meshing teeth,

The bottle holder is a hollow cylinder with a bottom, the bottom of the bottle holder is provided with a second through hole, the inner side of the bottom of the bottle holder is provided with a hollow first mounting post, and the central axis of the first mounting post is Coinciding with the central axis of the second through hole, the inner side wall of the first mounting post is provided with at least one fifth thread matching the fourth thread on the push rod, and the outer side of the bottom of the bottle holder is provided There is a fourth elastic member,

The tail cap is installed on the first drum, and the outer side wall of one end of the tail cap installed on the first drum is provided with a circumferential fifth groove,

The bottle holder is installed in the end of the second casing facing the first casing, the fourth elastic member is in contact with the bottom of the medicine storage bottle, and the bottle holder faces away from the second casing. One end of the casing is installed in the transmission member, the second clutch gear is located in the bottle holder, and the third one-way meshing teeth are meshed with the fourth one-way meshing teeth of the transmission member, and the first The first installation end of the third rotating drum is installed in the transmission member, the second clutch gear is sleeved on the first installation end of the third rotating drum, and the fourth groove of the second clutch gear sleeve is connected to the The third protruding rib of the third rotating drum is matched, the second elastic member is sandwiched between the inner side of the bottom of the bottle holder and the second clutch gear, and one end of the push rod is installed on the third rotating drum. In the installation end of the cylinder, the other end protrudes from the first installation post of the bottle holder, the push rod is threadedly connected with the second installation post of the bottle holder, and the third groove of the push rod is connected to the second installation post of the bottle holder. The second ridges of the third rotating drum are matched with each other, the second rotating drum is sleeved on the third rotating drum, and the second groove of the third rotating drum is matched with the first groove of the second rotating drum. A convex rib is matched, the barb of the third drum is matched with the first sliding hole of the second drum, and the first clutch gear is sleeved on the first meshing tooth of the second drum. and the second meshing teeth of the first clutch gear mesh with the first meshing teeth of the second drum, the rotating member is threadedly mounted on the third threaded portion of the second drum, the first The four protruding ribs are matched with the first groove, the first drum is sleeved on the second drum, and the first one-way meshing teeth of the first drum are engaged with the first clutch The second one-way meshing teeth of the gear are engaged, the first groove of the first rotating drum is matched with the fourth convex edge of the rotating member, and the first limiting member of the first rotating drum is located on the tail cap In the fifth groove of , the third elastic member is sandwiched between the tail cap and the second drum, and the scale indicator plate is sleeved on the first drum, and is connected with the The first drum is threaded,

The second one-way meshing teeth of the first clutch gear and the tooth direction of the second meshing teeth are designed so that, when the dose is set, the first rotating drum is rotated by an external force, and the first rotating drum of the first rotating drum is rotated by an external force. The one-way meshing teeth slide over the tooth backs of the second one-way meshing teeth of the first clutch gear, or the second meshing teeth of the first clutch gear slide over the teeth of the second drum. The tooth back of the first meshing tooth slides over,

The tooth direction design of the third one-way meshing teeth of the second clutch gear is such that when the rotation of the third drum drives the second clutch gear to rotate, the third one-way meshing teeth of the second clutch gear rotate from The tooth backs of the fourth one-way meshing teeth of the transmission member slide over.

Further, in the syringe that can quantitatively output fluid provided by the present invention, it may also have the following feature: the second casing is provided with a second visual window and a scale line.

Further, in the syringe that can quantitatively output fluid provided by the present invention, it may also have the following feature: the side wall of the mounting member is provided with at least one axially arranged second sliding hole, and the inner side of the mounting member is provided with at least one axially arranged second sliding hole. The wall is provided with at least one axially arranged sixth groove, the inner side wall of the mounting member is provided with a circle of fifth ridges at one end facing the second housing, and the sliding joint is provided with There are two first sliding blocks corresponding to the second sliding holes in the same number of sliding holes and sixth ridges corresponding to the sixth grooves in the same number as the sixth grooves. An end of the sliding joint facing away from the mounting member is provided with a bottom side surface, a third through hole is provided on the bottom side surface, and the first elastic member is sandwiched between the fifth protruding rib and the bottom side surface, The first sliding block is slidably installed in the corresponding second sliding hole, and the sixth protruding edge is slidably installed in the corresponding sixth groove.

Further, in the syringe that can quantitatively output fluid provided by the present invention, it may also have the following feature: the outer side of the second housing close to the connecting end of the needle is provided with a circular first protrusion, the first protrusion At least two installation grooves are provided on the side wall from the upper part, and the installation grooves include a seventh groove arranged in the circumferential direction and an eighth groove that communicates with the seventh groove and forms an angle with the axial direction. The direction in which the groove forms an angle with the central axis of the first protrusion makes the angle between the seventh groove and the eighth groove greater than 90 degrees, and the seventh groove faces the eighth groove One end of the groove is provided with a stopper, and one end of the inner side wall of the mounting member facing the second housing is provided with a second protrusion with the same number as the mounting grooves and matching the mounting grooves. When the component is installed on the second housing, the second protrusion enters the eighth groove through the seventh groove.

Further, in the syringe capable of quantitatively outputting fluid provided by the present invention, it may also have the feature that a silicone sheet is provided on the end face of the end of the sliding joint facing away from the mounting member.

Further, in the syringe that can quantitatively output fluid provided by the present invention, it may also have the following feature: a hollow second mounting post is provided on the end of the end of the second drum where the first sliding hole is provided, so that the A ninth groove is arranged at one end of the tail cap installed on the first drum, a sliding rod corresponding to the second installation column is arranged in the ninth groove, and a third elastic member is sleeved on the ninth groove. On the second installation column, the sliding rod slides into the second installation column.

Further, in the syringe that can quantitatively output fluid provided by the present invention, it may also have the following feature: the end of the first drum facing the tail cap is provided with a second limiting member, and the dial indicator is facing the direction of the end cap. One end of the tail cap is provided with a second limiting groove corresponding to the second limiting member.

Further, in the syringe that can quantitatively output fluid provided by the present invention, it may also have the following feature: the swirling member is a hollow incomplete column with a cross-sectional arc greater than 180°, and the outer side of the second rotating cylinder is A third limiting member is respectively provided on the wall at both ends of the third thread.

Further, in the syringe capable of quantitatively outputting fluid provided by the present invention, it may also have such a feature: the barb is a barb that is less than 90 degrees from the side wall surface of the third drum.

The utility model has the following advantages:

In the syringe capable of quantitatively outputting fluid according to the utility model, the design of the elastic joint enables the user to inject vertically into the skin, which is convenient to use, and can reduce the user's fear of injection; the design of the bottle holder can store the medicine bottle It is more firmly fixed to avoid inaccurate injection dose caused by the loose medicine storage bottle; the design of the dose adjustment unit has a simple and compact structure, and the processing and installation of various parts are convenient.

Description of drawings

1 is a schematic diagram of the external structure of a syringe capable of quantitatively outputting fluid in an embodiment of the present invention;

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

3 is a schematic structural diagram of the syringe capable of quantitatively outputting fluid in the embodiment of the present invention after removing the first housing and the cover;

Fig. 4 is the A-A sectional view of Fig. 3;

Fig. 5 is the exploded schematic diagram of Fig. 3;

Fig. 6 is the schematic diagram 1 of the installation member in the embodiment of the present invention;

Fig. 7 is the schematic diagram 2 of the installation member in the embodiment of the present invention;

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

9 is a schematic structural diagram of a second housing in an embodiment of the present invention;

10 is a schematic structural diagram of a dial in an embodiment of the present invention;

11 is a schematic structural diagram 1 of the first rotating drum in the embodiment of the present utility model;

12 is a second structural schematic diagram of the first rotating drum in the embodiment of the present invention;

13 is a schematic structural diagram of the second drum in the embodiment of the present invention;

14 is a schematic structural diagram of a first clutch gear in an embodiment of the present invention;

Figure 15 is a diagram of the cooperation of the second drum, the revolving member and the first clutch gear in the embodiment of the present invention;

16 is a schematic structural diagram of a tail cap in an embodiment of the present invention;

Fig. 17 is the structural representation of the third drum in the embodiment of the present invention;

18 is a schematic structural diagram of a second clutch gear in an embodiment of the present invention;

19 is a schematic structural diagram of a transmission member in an embodiment of the present invention;

20 is a schematic structural diagram of a bottle holder in an embodiment of the present invention.

Detailed ways

In order to make it easier to understand the technical means, creative features, goals and effects realized by the present invention, the following embodiments describe the syringe capable of quantitatively outputting fluid of the present invention in detail with reference to the accompanying drawings.

As shown in FIGS. 1-5 , the syringe 100 capable of quantitatively outputting fluid includes: a housing 10 , a needle 20 , an elastic joint 30 , a medicine storage bottle 40 , a piston 50 , and a dose adjusting unit 60 .

The casing 10 includes a first casing 11 , a second casing 12 and a cover 13 . A first viewing window 111 is provided on the first casing 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, the second casing 12 is provided with a second visual window 123 and a scale line. The cover body 13 covers the second casing 12 . Specifically, the cover body 13 and the second casing 12 are provided with mutually matching buckling members, and the cover body 13 is buckled on the second casing 12 .

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

The elastic joint 30 is installed on the connecting end of the needle head of the second housing 12 to cover the needle head 20 . When using it, the user can pierce the connector of the syringe vertically to the skin, avoiding the need to pierce obliquely when using the needle directly and needing the other hand to pinch the skin to be pierced, and can reduce the user's fear of injection. . The elastic joint 30 includes: a mounting member 31 , a sliding joint 32 and a first elastic member 33 . The mounting member 31 is mounted on the needle connection end of the second housing 12 , and the mounting member 31 is a hollow columnar shape. The sliding joint 32 has a hollow cylindrical shape, and the sliding joint 32 is slidably mounted in the mounting member 31 along the axial direction of the mounting member 31 . The first elastic member 33 is installed in the installation member 31 , and both ends of the first elastic member 33 are respectively restricted by the installation member 31 and the sliding joint 32 . The mounting member 31 is installed at the position of the connecting end of the needle head of the second housing 12, and the sliding distance of the sliding joint 32 is such that when not in use, the needle head 20 is located in the sliding joint 32, that is, the needle head 20 will not be exposed outside the sliding joint 32, and the needle head 20 will not be exposed outside the sliding joint 32. When the connector 32 is slid to the maximum distance in the direction of the needle 20, the distance the needle 20 protrudes is just enough to pierce the skin to a depth.

In this embodiment, as shown in FIG. 6 and FIG. 7 , the side wall of the mounting member 31 is provided with at least one axially arranged second sliding hole 311 . Specifically, the second sliding holes 311 are arranged at equal angles. More specifically, two second sliding holes 311 are provided with an interval of 180°. The inner side wall of the mounting member 31 is provided with at least one axially arranged sixth groove 312, specifically, the sixth grooves 312 are arranged at equal intervals, and more specifically, there are two sixth grooves 180° apart. The grooves 312, the two second sliding holes 311 and the two sixth grooves 312 are arranged in a staggered manner, and the interval between the adjacent sixth grooves 312 and the second sliding holes 311 is 90°. An end of the inner side wall of the mounting member 31 facing the second housing 12 is provided with a circle of fifth protruding ribs 313 . As shown in FIG. 8 , the sliding joint 32 is provided with the same number of first sliding blocks 321 as the second sliding holes 311 respectively corresponding to the second sliding holes 311 and the same number as the sixth grooves 312 respectively corresponding to the sixth sliding blocks 321 . The sixth convex rib 322 corresponding to the groove 312 , specifically, the first sliding block 321 is located at the end of the sliding joint 32 facing the second housing 12 . One end of the sliding joint 32 facing away from the mounting member 31 is provided with a bottom side surface 323 , a third through hole 324 is provided on the bottom side surface 323 , and the first elastic member 33 is sandwiched between the fifth convex rib 313 and the bottom side surface 323 . The sliding block 321 is slidably installed in the corresponding second sliding hole 311 , and the sixth convex rib 322 is slidably installed in the corresponding sixth groove 312 .

In this embodiment, as shown in FIG. 9 , a circular first protrusion 121 is provided on the outer side of the second housing 12 near the connecting end of the needle, and at least two installation grooves are provided on the side wall of the first protrusion 121 122, the installation groove 122 includes a seventh groove 1221 and an eighth groove 1222. The seventh groove 1221 is disposed along the circumferential direction of the first protrusion 121 , the eighth groove 1222 forms an angle with the central axis of the first protrusion 121 , and the eighth groove 1222 forms an angle with the central axis of the first protrusion 121 is oriented so that the angle between the seventh groove 1221 and the eighth groove 1222 is greater than 90 degrees. One end of the seventh groove 1221 facing the eighth groove 1222 is provided with a stopper 1223 . 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 . One end of the inner side wall of the mounting member 31 facing the second housing 12 is provided with second protrusions 314 having the same number as the mounting grooves 122 and matching the mounting grooves 122 . 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 installation groove 122 and the second protrusion 314 makes it very easy to install the elastic joint 30 on the second housing 12, and very easy to disassemble, which is convenient for the patient to use. Specifically, the installation grooves 122 are arranged at equal angles, and a total of four installation grooves 122 are arranged on the side wall of the first protrusion 121 .

In this embodiment, the end surface of the end of the sliding joint 32 facing away from the mounting member 31 is provided with a silicone sheet 34 , that is, the bottom side surface 323 is provided with a silicone sheet 34 . The purpose of disposing the silicone sheet 34 is that when the bottom side surface 323 of the sliding joint 32 contacts the skin, the silicone sheet 34 is in good contact with the skin and provides a good user experience.

The medicine storage bottle 40 is installed in the second housing 12 , and the piston 50 is slidably installed in the medicine storage bottle 40 .

The dose adjustment unit 60 includes: a dial indicator 601, a first drum 602, a second drum 603, a third drum 604, a revolving member 605, a push rod 606, a first clutch gear 607, a second clutch gear 608, a transmission Member 609 , second elastic member 610 , third elastic member 611 , bottle holder 612 , tail cap 613 .

As shown in FIG. 10 , the scale indicating plate 601 is installed in the first housing 11 , and the inner side wall of the scale indicating plate 601 is provided with a second thread 6011 . Specifically, a third visual window 6012 is provided on the scale indicating plate 601, and a pointer is provided on the third visual window 6012. The outer side wall of the dial 601 is provided with a seventh rib 6013, and the inner side wall of the first housing 11 is provided with a tenth groove (not shown in the figure) matching the seventh rib 6013. The window 6012 is provided with an eighth convex rib 6014 matching the first viewing window 111 . During installation, the seventh convex rib 6013 is matched with the tenth groove, and the eighth convex rib 6014 is matched with the first visual window 111 . The body 11 does not move.

As shown in FIGS. 11 and 12 , the inner side of one end of the first rotating drum 602 is provided with a first one-way meshing tooth 6021 , and the inner side wall of the other end is provided with a first limiting member 6022 , specifically, the first limiting member 6022 A circle of ridges. At least one first groove 6023 is axially provided on the inner side wall of the first drum, and first threads 6024 are provided on the outer side wall of the first drum 602 , and the first threads 6024 match the second threads 6011 . The scale indicating plate 601 is sleeved on the first rotating drum 602 and is threadedly connected with the first rotating drum 602 . The first rotating drum 602 can move relative to the scale indicating plate 601 when rotated, that is, it is screwed or rotated relative to the first housing 11 . out. A scale value is set on the outer side wall of the first rotating drum 602 . When the first rotating drum 602 rotates, the injected drug dose can be known through the first visual window 111 and the third visual window 6012 .

In this embodiment, the end of the first rotating drum 602 facing the tail cap 613 is provided with a second limiting member 6025, and the end of the dial indicator 601 facing the tail cap 613 is provided with a second limiting member 6025 corresponding to the second limiting member 6025. Limit slot 6015. When the first rotating drum 602 is rotated and screwed into the first housing 11 , the depth of the first rotating drum 602 is limited, so that each time the first rotating drum 602 is rotated out, the re-rotating position is the same.

As shown in FIG. 13 , first meshing teeth 6031 are provided on the outer side wall of one end of the second rotating drum 603 , and a pair of first sliding holes 6032 are axially provided on the side wall of the other end. At least one first protruding edge 6033 is disposed along the axial direction, specifically, the first protruding edges 6033 are arranged at equal angles, and more specifically, there are two first protruding edges 6033 . A third thread 6034 is provided on the outer side of the second drum.

The convolution member 605 is a hollow incomplete or completely cylindrical shape with an arc of a cross section greater than 180°. The inner side wall of the revolving member 605 is provided with a fourth thread (not shown in the figure) that matches the third thread 6034 on the outer side of the second drum 603, and the outer side wall of the revolving member 605 is axially provided with a first concave thread. The groove 6023 matches the fourth rib 6051. In this embodiment, the swirling member 605 is a hollow incomplete column with an arc of a cross section greater than 180°. Third limiting members 6036 are respectively provided on the outer side wall of the second rotating drum 603 at both ends of the third thread 6034 . The third limiting member 6036 limits the distance of the helical movement of the rotating member 605 on the second drum 603 .

As shown in FIG. 14 , 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 that matches the first one-way meshing tooth 6021 , and the other side is provided with a second one-way meshing tooth 6071 . The second meshing teeth 6072 matched with the first meshing teeth 6031. Specifically, only a few of the second meshing teeth 6072 can be matched with the first meshing teeth 6031 .

As shown in FIG. 15 , the revolving member 605 is sleeved on the third threaded portion of the second drum 603 , and is threadedly connected with the second drum 603 , and the fourth rib 6051 is matched with the first groove 6023 . When the first drum 602 rotates relative to the second drum 603 , the first drum 602 drives the rotating member 605 to rotate relative to the second 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 drum 603 , and the second meshing teeth 6072 of the first clutch gear 607 mesh with the first meshing teeth 6031 of the second drum 603 . The first drum 602 is sleeved on the second drum 603, and the first one-way meshing teeth 6021 of the first drum 602 mesh with the second one-way meshing teeth 6071 of the first clutch gear 607.

Viewed from the direction of FIG. 3 , the tooth directions of the second one-way meshing teeth 6071 and the second meshing teeth 6072 of the first clutch gear 607 are designed so that when the dose is set, the external force is driven (ie, the first drum 602 is manually screwed). When the first drum 602 is rotated clockwise, the first one-way meshing teeth 6021 of the first 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 rotates. When the external force drives the first rotating drum 602 to rotate counterclockwise, 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, and the first rotating drum 602 drives the When a clutch gear 607 rotates, the second meshing tooth 6072 of the first clutch gear 607 slides over the tooth back of the first meshing tooth 6031 of the second drum 603 , and the first clutch gear 607 cannot drive the second drum 603 to rotate. That is, when the external force drives the first rotating drum 602 to rotate, no matter whether it is forward or reverse, the second rotating drum 603 cannot be driven to rotate.

The tail cap 613 is installed on the first rotating drum 602 . As shown in FIG. 16 , the tail cap 613 is installed on the outer side wall of one end of the first rotating drum 602 and is provided with a circumferential fifth groove 6131 . After the tail cap 613 is installed on the first rotating drum 602, the first limiting member 6022 is located in the fifth groove 6131, and the first limiting member 6022 restricts the tail cap 613 from sliding out of the first rotating drum 602.

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

In this embodiment, as shown in FIG. 13 , a hollow second mounting post 6035 is provided on the end of the end of the second drum 603 where the first sliding hole is provided, and the tail cap 613 is mounted on one end of the first drum 602 A ninth groove 6132 is provided, a sliding rod 6133 corresponding to the second mounting post 6035 is provided in the ninth groove 6132, the third elastic member 611 is sleeved on the second mounting post 6035, and the sliding rod 6133 slides into the inside the second mounting post 6035.

As shown in FIG. 17 , one end of the third rotating drum 604 is provided with a first installation end 6045 , and two second ridges 6041 are arranged on the inner side wall of the first installation end 6045 along the axial direction. A plurality of third protruding ribs 6042 are axially provided on the outer side wall of the first mounting end. The other end of the third rotating drum 604 is provided with a pair of barbs 6043 matching the first sliding holes 6032 , and the outer side wall of the third rotating drum 604 is axially provided with a second concave matching the first convex rib 6033 . Slot 6044. The second rotating cylinder 603 is sleeved on the third rotating cylinder 604, and the barb 6043 cooperates with the first sliding hole 6032 to limit the outward rotation distance of the first rotating cylinder 602, so as to ensure the maximum injection capacity of the syringe. The dose is also used to prevent the first drum 602 from falling out of the dial indicator 601 indefinitely. The first protruding rib 6033 is matched with the second groove 6044 . The rotation of the second drum 603 can drive the third drum 604 to rotate.

In this embodiment, the barb 6043 is a barb that is less than 90 degrees from the side wall surface of the third drum 604 . Specifically, the angle is 40°-60°.

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) which are respectively matched with the two second protruding ribs 6041 .

As shown in FIG. 18 , the second clutch gear 608 is a hollow cylinder, and one side of the second clutch gear 608 is provided with a third one-way meshing tooth 6081. A plurality of fourth grooves 6082 matched with the third protruding ribs 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 ridges 6042 may be different from the number of the fourth grooves 6082, and there is no need to arrange them at equal intervals. The groove 6082 can be matched.

As shown in FIG. 20 , the bottle holder 612 is installed on the second housing 12 . 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. The inner side of the bottom of the bottle holder is provided with a hollow first mounting post 6122. The central axis of the first mounting post 6122 is connected to the second through hole. The central axes of the holes 6121 coincide, and at least one circle of fifth threads 6123 matching the fourth thread on the push rod 606 is provided on the inner side wall of the first mounting post 6122 . A fourth elastic member 6124 is disposed on the outer side of the bottom of the bottle holder 612 , and the fourth elastic member 6124 is used to firmly fix the medicine storage bottle 40 in the second housing 12 .

As shown in FIG. 19 , 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 of the bottom of the transmission member 609 is provided with a fourth one-way matching tooth 6081. Meshing teeth 6092.

The first mounting end 6045 of the third drum 604 is mounted within the transmission member 609 . The second clutch gear 608 is sleeved on the first installation end of the third drum 604, and the fourth groove 6082 of the second clutch gear 608 is matched with the third ridge 6042 of the third drum 604, so that the third rotation The rotation of the drum 604 can drive the second clutch gear 608 to rotate. The second clutch gear 608 meshes with the fourth one-way meshing tooth 6092 of the transmission member 609 , and the tooth direction of the third one-way meshing tooth 6081 of the second clutch gear 608 is designed so that the third drum 604 drives the second clutch gear 608 During rotation, the third one-way meshing teeth 6081 of the second clutch gear 608 slide over the tooth backs of the fourth one-way meshing teeth 6092 of the transmission member 609 . The function of the second clutch gear 608 is: when the second clutch gear 608 rotates in the reverse direction (ie, it is opposite to the direction driven by the third drum 604 ), the third one-way meshing teeth 6081 mesh with the fourth one-way meshing teeth 6092 , and cannot rotate. Reverse rotation, 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 keeps the second clutch gear 608 and the transmission member 609 in a state of meshing or contacting all the time. One end of the push rod 606 is installed in the installation end of the third rotating drum 604 , and the other end protrudes from the first installation post 6122 of the bottle holder 612 . The third groove of the push rod 606 is matched with the second convex rib 6041 of the third drum 604 , so that the rotation of the third drum 604 can drive the push rod 606 to rotate.

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.

working principle:

First, the injection dose is set. Viewed from the direction of FIG. 3 , the first rotating drum 602 is rotated clockwise, and the scale observed through the scale indicator plate 601 can be adjusted to the required injection dose. When the first 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. The drum 602 is rotated upward, and the first drum 602 drives the second drum 603 to move upward. Since the first installation end of the third drum 604 is installed in the transmission member 609, the third drum 604 will not move upward. When the set dose exceeds the dose required for this injection, the first drum 602 can also be rotated counterclockwise to adjust the dose. When the first drum 602 is rotated counterclockwise, the first one-way meshing teeth 6021 and the first clutch gear The second one-way meshing tooth 6071 of 607 meshes and drives the first clutch gear 607 to rotate. 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 drum 603 to rotate. .

After setting the dose, start the injection. When injecting, look in the direction of FIG. 3 and press the tail cap 613 downward. The tail cap 613 pushes the second drum 603 to move down, and the second drum 603 drives the first drum 602 to When the first drum 602 moves down, it rotates counterclockwise and moves downward (the first drum 602 rotates and moves downward under the mutual guidance of the first thread 6024 and the second thread 6011 of the dial indicator 601), Due to the force applied to the second drum 603, the first drum 602, the first clutch gear 607 and the second drum 603 are engaged, and when the first drum 602 rotates counterclockwise, the first drum 602, the second drum A clutch gear 607 and the second drum 603 are always in meshing state and are not separated, so the first drum 602 can drive the first clutch gear 607 to rotate counterclockwise, and the first clutch gear 607 drives the second drum 603 to rotate counterclockwise , the second drum 603 drives the third drum 604 to rotate counterclockwise, the third drum 604 drives the second clutch gear 608 and the push rod 606 to rotate, and the second clutch gear 608 rotates from the fourth one-way meshing tooth 6092 of the transmission member 609 The back of the tooth slides over, and the push rod 606 rotates relative to the first mounting post 6122 of the bottle holder 612 (threaded connection), therefore, the push rod 606 moves toward the direction of the medicine storage bottle 40, pushing the piston 50 to move, thereby injecting the medicinal liquid skin.

Since the process of setting a dose does not move the plunger 606, each injection the plunger 606 pushes the piston 50 from the position of the last injection.

The above-mentioned embodiments are preferred cases of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (9)

1. An injector capable of quantitatively delivering a fluid, comprising:

the shell comprises a first shell, a second shell and a cover body, wherein a first visible window is arranged on the first shell, one end of the second shell is connected with the first shell, the other end of the second shell is a needle head connecting end, and the cover body covers the second shell;

the needle head is arranged at the needle head connecting end of the second shell;

an elastic joint, comprising: the needle inserting device comprises a hollow columnar mounting member mounted at a needle connecting end of the second shell, a hollow columnar sliding joint mounted in the mounting member in a sliding mode along the axial direction of the mounting member, and a first elastic member mounted in the mounting member, wherein two ends of the first elastic member are respectively limited by the mounting member and the sliding joint;

a medicine storage bottle mounted in the second housing;

a piston slidably mounted within the vial; and

a dose adjustment unit comprising: a scale indicating disc, a first rotary drum, a second rotary drum, a third rotary drum, a rotary 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 support and a tail cap which are arranged in the first shell,

the inner side of one end of the first rotary drum is provided with a first one-way meshing tooth, the inner side wall of the other end of the first rotary drum is provided with a first limiting component, the inner side wall of the first rotary drum is provided with at least one first groove along the axial direction, the outer side wall of the first rotary drum is provided with a first thread, the outer side wall of the first rotary drum is provided with a scale value,

a second thread matched with the first thread is arranged on the inner side wall of the scale indicating disc,

the outer side wall of one end of the second rotary drum is provided with a first meshing tooth, the side wall of the other end of the second rotary drum is provided with a pair of first sliding holes along the axial direction, the inner side wall of the second rotary drum is provided with at least one first convex edge along the axial direction, the outer side of the second rotary drum is provided with a third thread,

one end of the third rotary drum is provided with a first mounting end, the inner side wall of the first mounting end is axially provided with two second convex edges, the outer side wall of the first mounting end is axially provided with a plurality of third convex edges, the other end of the third rotary drum is provided with a pair of inverted hooks matched with the first sliding hole, the outer side wall of the third rotary drum is axially provided with a second groove matched with the first convex edges,

the rotary member is a hollow incomplete or complete column with the radian of the cross section larger than 180 degrees, the inner side wall of the rotary member is provided with a fourth thread matched with the third thread on the outer side of the second rotary drum, the outer side wall of the rotary member is provided with a fourth convex rib matched with the first groove along the axial direction,

the push rod is provided with a fourth thread, two third grooves which are respectively matched with the two second convex edges are arranged on the push rod in the axial direction,

the first clutch gear is a hollow cylinder, one side of the first clutch gear is provided with a second one-way meshing tooth matched with the first one-way meshing tooth, the other side of the first clutch gear is provided with a second meshing tooth matched with the first meshing tooth,

the second clutch gear is a hollow cylinder, one side of the second clutch gear is provided with a third one-way meshing tooth, the inner side wall of the second clutch gear is provided with a plurality of fourth grooves matched with the third ribs,

the transmission component is a hollow cylinder with a bottom, the bottom of the transmission component is provided with a first through hole, the inner side surface of the bottom of the transmission component is provided with a fourth unidirectional meshing tooth matched with the third unidirectional meshing tooth,

the bottle support is a hollow cylinder with a bottom, the bottom of the bottle support is provided with a second through hole, the inner side of the bottom of the bottle support is provided with a hollow first mounting column, the central axis of the first mounting column is superposed with the central axis of the second through hole, the inner side wall of the first mounting column is provided with at least one circle of fifth screw thread matched with the fourth screw thread on the push rod, the outer side of the bottom of the bottle support is provided with a fourth elastic component,

the tail cap is arranged on the first rotary drum, a circumferential fifth groove is arranged on the outer side wall of one end of the tail cap arranged on the first rotary drum,

the bottle holder is arranged in one end of the second shell facing the first shell, the fourth elastic component is in contact with the bottom of the medicine storage bottle, one end of the bottle holder, which faces away from the second shell, is arranged in the transmission component, the second clutch gear is arranged in the bottle holder, the third one-way meshing teeth are meshed with the fourth one-way meshing teeth of the transmission component, the first mounting end of the third rotary drum is arranged in the transmission component, the second clutch gear is sleeved at the first mounting end of the third rotary drum, the fourth groove of the second clutch gear sleeve is matched with the third convex rib of the third rotary drum, the second elastic component 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 arranged in the mounting end of the third rotary drum, and the other end of the push rod extends out of the first mounting column of the bottle holder, the push rod is in threaded connection with the second mounting column of the bottle holder, a third groove of the push rod is matched with a second convex edge of a third rotary drum, the second rotary drum is sleeved on the third rotary drum, a second groove of the third rotary drum is matched with a first convex edge of the second rotary drum, an inverted hook of the third rotary drum is matched with a first slide hole of the second rotary drum, the first clutch gear is sleeved on a first meshing tooth end of the second rotary drum, a second meshing tooth of the first clutch gear is meshed with a first meshing tooth of the second rotary drum, the revolving member is in threaded installation on a third threaded part of the second rotary drum, the fourth convex edge is matched with the first groove, the first rotary drum is sleeved on the second rotary drum, and a first one-way meshing tooth of the first rotary drum is meshed with a second one-way meshing tooth of the first clutch gear, the first groove of the first rotary drum is matched with the fourth rib of the rotary member, the first limiting member of the first rotary drum is positioned in the fifth groove of the tail cap, the third elastic member is clamped between the tail cap and the second rotary drum, the scale indicating dial is sleeved on the first rotary drum and is in threaded connection with the first rotary drum,

the tooth orientations of the second one-way engagement teeth and the second engagement teeth of the first clutch gear are designed such that, at the time of dose setting, an external force rotates the first drum, the first one-way engagement teeth of the first drum slip over the tooth backs of the second one-way engagement teeth of the first clutch gear, or the second engagement teeth of the first clutch gear slip over the tooth backs of the first engagement teeth of the second drum,

the tooth direction of the third one-way meshing tooth of the second clutch gear is designed to enable the third one-way meshing tooth of the second clutch gear to slide through the tooth back of the fourth one-way meshing tooth of the transmission member when the third drum rotates to drive the second clutch gear to rotate.

2. Syringe according to claim 1, characterized in that:

and a second visual window and scale marks are arranged on the second shell.

3. Syringe according to claim 1, characterized in that:

the side wall of the mounting component is provided with at least one second sliding hole which is axially arranged, the inner side wall of the mounting component is provided with at least one sixth groove which is axially arranged, one end of the inner side wall of the mounting component facing the second shell is provided with a circle of fifth convex ribs, the sliding joint is provided with a first slide block which has the same number with the second sliding hole and is respectively corresponding to the second sliding hole and a sixth convex edge which has the same number with the sixth groove and is respectively corresponding to the sixth groove, one end of the sliding joint, which is back to the mounting component, is provided with a bottom side surface, the bottom side surface is provided with a third through hole, the first elastic component is clamped between the fifth convex edge and the bottom side surface, the first sliding blocks are slidably mounted in the corresponding second sliding holes, and the sixth convex edges are slidably mounted in the corresponding sixth grooves.

4. Syringe according to claim 1, characterized in that:

the outside that the second casing is close to the syringe needle link is provided with the first arch of round circular shape, be provided with two at least mounting grooves on the first bellied lateral wall, the mounting groove include the seventh recess that circumference set up and with seventh recess intercommunication and with the axial form the eighth recess of contained angle, the eighth recess with the direction that first bellied axis formed the contained angle makes the seventh recess with angle between the eighth recess is greater than 90 degrees, the seventh recess orientation the one end of eighth recess is provided with the dog, the inside wall orientation of installation component the one end of second casing be provided with the mounting groove quantity the same and with the second that the mounting groove matches is protruding, the installation component is installed into when on the second casing, the second is protruding to be passed through the seventh recess gets into in the eighth recess.

5. Syringe according to claim 1, characterized in that:

and a silica gel sheet is arranged on the end face of one end of the sliding joint, which faces away from the mounting component.

6. Syringe according to claim 1, characterized in that:

the end part of one end, provided with the first sliding hole, of the second rotary drum is provided with a hollow second mounting column, the tail cap is mounted at one end of the first rotary drum is provided with a ninth groove, a sliding rod corresponding to the second mounting column is arranged in the ninth groove, a third elastic component is sleeved on the second mounting column, and the sliding rod stretches into the second mounting column in a sliding manner.

7. Syringe according to claim 1, characterized in that:

the end of the first rotary drum, facing the tail cap, is provided with a second limiting member, and the end of the scale indicating disc, facing the tail cap, is provided with a second limiting groove corresponding to the second limiting member.

8. Syringe according to claim 1, characterized in that:

the rotary member is a hollow incomplete column with the radian of the cross section larger than 180 degrees, and third limiting members are respectively arranged at two ends of the third thread on the outer side wall of the second rotary drum.

9. The syringe capable of quantitatively delivering a fluid according to claim 1, wherein:

the barbs are barbs less than 90 degrees from the side wall surface of the third drum.

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