CN113440687B - Implantable injector - Google Patents
Implantable injector Download PDFInfo
- Publication number
- CN113440687B CN113440687B CN202010211031.7A CN202010211031A CN113440687B CN 113440687 B CN113440687 B CN 113440687B CN 202010211031 A CN202010211031 A CN 202010211031A CN 113440687 B CN113440687 B CN 113440687B
- Authority
- CN
- China
- Prior art keywords
- outer sleeve
- inner sleeve
- syringe
- sleeve
- push rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 239000007943 implant Substances 0.000 claims abstract description 27
- 230000013011 mating Effects 0.000 claims 2
- 230000001681 protective effect Effects 0.000 claims 1
- 238000009472 formulation Methods 0.000 abstract description 18
- 239000000203 mixture Substances 0.000 abstract description 18
- 206010033675 panniculitis Diseases 0.000 abstract description 13
- 210000004304 subcutaneous tissue Anatomy 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
- A61M5/504—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the fluid passageway
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/3159—Dose expelling manners
- A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M2005/3131—Syringe barrels specially adapted for improving sealing or sliding
Abstract
The present invention relates to a device for delivering a formulation into subcutaneous tissue, and in particular to an implant syringe. The implant syringe of the present invention comprises: the injection needle is fixedly connected with the front end of the outer sleeve, the preparation receiving part is fixedly arranged in the outer sleeve, the outer sleeve is axially and slidably arranged outside the inner sleeve, the inner wall of the outer sleeve is provided with a radial clamping part extending inwards, and the radial clamping part is provided with a first position for limiting the outer sleeve to axially slide; the injector push rod and the inner sleeve are axially and slidably arranged, the piston is fixedly arranged in the injector push rod, and the front end of the piston corresponds to the preparation accommodating cavity of the preparation receiving part; when the syringe push rod axially slides towards the front end of the inner sleeve, the piston slides forwards along the preparation accommodating cavity, and when the syringe push rod enters the outer sleeve, the radial clamping part receives the outward acting force of the syringe push rod and breaks away from the first position to release the axial sliding restriction on the outer sleeve.
Description
Technical Field
The present invention relates to a device for delivering a formulation into subcutaneous tissue, and in particular to an implant syringe.
Background
An implantable injector is a device for delivering a preparation into subcutaneous tissues, and generally comprises an injection needle for penetrating into the skin, a containing cavity for containing the preparation is arranged in an outer sleeve connected with the injection needle, a push rod and a piston connected with the push rod are arranged in the outer sleeve, when the injection needle penetrates into the subcutaneous tissues, the push rod is pushed to push the preparation into the injection needle from the containing cavity in the outer sleeve, then the injection needle is withdrawn from the tissue by pulling the outer sleeve backwards, and in the process of withdrawing the injection needle, the preparation is withdrawn from a needle head of the injection needle and is reserved in the subcutaneous tissues under the pushing action of the piston.
In the operation process of the implantation syringe, when the pushing push rod is operated to enable the preparation to enter the injection needle, the injection needle must keep the original position, if the position of the injection needle changes in the pushing process of the push rod, the preparation cannot reach the preset position, so that in order to ensure that the injection needle does not generate position change in the pushing process of the push rod, an operator needs to avoid touching an outer sleeve connected with the injection needle as much as possible, and the holding area of the implantation syringe is too narrow in the operation process, so that the operation is inconvenient.
Disclosure of Invention
Accordingly, it is necessary to provide an implant syringe which is easy to hold and prevents erroneous operation, in order to solve the problem of inconvenience in operation of the existing implant syringe.
The above purpose is achieved by the following technical scheme:
an implant syringe, comprising: an injection needle, an outer sleeve, a preparation receiving part, an inner sleeve, a syringe push rod and a piston,
The injection needle is fixedly connected with the front end of the outer sleeve, the preparation receiving part is fixedly arranged in the outer sleeve, and the front end of a preparation accommodating cavity in the preparation receiving part is communicated with the inner cavity of the injection needle through the front end of the outer sleeve;
the outer sleeve is axially arranged outside the inner sleeve in a sliding manner, the inner wall of the outer sleeve is provided with a radial clamping part extending inwards, and the radial clamping part is provided with a first position for limiting the axial sliding of the outer sleeve;
The syringe push rod and the inner sleeve are axially and slidably arranged, the piston is fixedly arranged inside the syringe push rod, and the front end of the piston corresponds to the preparation accommodating cavity of the preparation receiving part;
when the syringe push rod axially slides towards the front end of the inner sleeve, the piston slides forwards along the preparation accommodating cavity, and when the syringe push rod enters the inner sleeve, the radial clamping part is subjected to the outward acting force of the syringe push rod and is separated from the first position so as to release the axial sliding restriction of the outer sleeve.
In one embodiment, the outer sleeve has two axially sliding limit positions relative to the inner sleeve, and the radial engagement portion is located in the first position to limit the axial sliding of the outer sleeve when the outer sleeve is located in either limit position.
The beneficial effects of the invention are as follows: the inner wall of the outer sleeve of the implanted syringe is provided with the inward extending radial clamping part, the radial clamping part can limit the axial sliding of the outer sleeve relative to the inner sleeve, and when the push rod of the syringe is pushed to axially slide towards the front end of the inner sleeve, the outer sleeve is limited by the radial clamping part to slide, so that the injection needle always keeps at the original position, and the preparation can be pushed to the preset position by the piston.
The outer sleeve of the implanted syringe has two limiting positions which axially slide relative to the inner sleeve, when the outer sleeve is pulled to enable the injection needle to be removed from subcutaneous tissue, the outer sleeve slides to the rear end of the inner sleeve to the limiting position, and the radial clamping part is positioned at the first position to limit the axial sliding of the outer sleeve, namely, after the implanted syringe is used, the outer sleeve is locked with the inner sleeve again, so that the syringe is prevented from being reused.
Drawings
FIG. 1 is a schematic view of an embodiment of an implantable injector according to the present invention;
FIG. 2 is a schematic view of an outer sleeve according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an outer sleeve of an embodiment of an implantable injector of the present invention;
FIG. 4 is a schematic view of the rear portion of the inner sleeve of an embodiment of the implantable injector of the present invention;
figure 5 is a cross-sectional view of the rear of the inner sleeve in one embodiment of the implantable injector of the present invention;
FIG. 6 is a schematic view of the front portion of the inner sleeve of an embodiment of the implantable injector of the present invention;
figure 7 is a cross-sectional view of the front portion of the inner sleeve in one embodiment of the implantable injector of the present invention;
FIG. 8 is a schematic view of a syringe plunger according to an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a syringe plunger in one embodiment of an implantable syringe of the present invention;
FIG. 10 is a schematic view showing the structure of a needle protecting cap in an embodiment of the implant syringe according to the present invention; FIG. 11 is a cross-sectional view of the needle shield cap of one embodiment of the implantable injector of the present invention;
FIG. 12 is a schematic view of the structure of the preparation receiving portion of an embodiment of the implant syringe of the present invention; FIG. 13 is a schematic view of the push rod stop member of an embodiment of the implantable injector of the present invention; FIG. 14 is an initial state diagram of an embodiment of an implantable injector of the present invention;
FIG. 15 is an enlarged view of a portion of FIG. 14 at A;
FIG. 16 is an intermediate state diagram of an embodiment of an implantable injector of the present invention;
FIG. 17 is an enlarged view of a portion of FIG. 16 at B;
FIG. 18 is a termination state diagram of one embodiment of an implantable injector of the present invention;
Fig. 19 is a partial enlarged view of fig. 18 at C.
Wherein:
100-an injection needle;
200-an outer sleeve;
210-a needle base;
220-radial snap-in portion;
221-a clamping groove;
222-inclined plane;
230-stop resilient arms;
240-convex edges;
300-a preparation receiving portion;
310-a formulation holding chamber;
320-slits;
400-an inner sleeve;
410-front cross bridge;
420-sliding slot;
430-rear cross axle;
440-an inner sleeve front;
441-head; 4411-the outer edge of the long axis; 4412-the outer edge of the minor axis;
442-connecting rods;
450-the rear of the inner sleeve;
451-jacks;
500-syringe push rod;
510-pushing part;
600-piston;
700-needle protection cap;
710—short slots;
720-abutment;
800-push rod stop member;
810-snap ring;
820-latch;
830-handle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description of the present invention will be made in detail by way of example with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The numbering of components herein, such as "first," "second," etc., is used merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
As shown in fig. 1 and 14, the present invention provides an implant syringe comprising: needle 100, outer sleeve 200, formulation receiving portion 300, inner sleeve 400, syringe plunger 500, and plunger 600.
As shown in fig. 2 and 3, the front end of outer sleeve 200 has a needle base 210, and the rear end of needle 100 is inserted into needle base 210 to be fixedly coupled with the front end of outer sleeve 200. The part of the interior of outer sleeve 200 connected with needle base 210 is provided with a mounting seat, the front end of preparation receiving section 300 is inserted into the mounting seat and fixedly arranged in the interior of outer sleeve 200, and the front end of preparation accommodating cavity 310 in preparation receiving section 300 is communicated with the inner cavity of needle 100 through the front end of outer sleeve 200, and preparation accommodating cavity 310 is coaxial with the inner cavity of needle 100.
Outer sleeve 200 is axially slidably disposed outside inner sleeve 400, and an inner wall of outer sleeve 200 is provided with an inwardly extending radial engagement portion 220, radial engagement portion 220 having a first position that limits axial sliding of outer sleeve 200.
As shown in fig. 14, the syringe plunger 500 is axially slidably disposed with the inner sleeve 400, the rear end of the piston 600 is inserted into the syringe plunger 500 and fixedly coupled with the syringe plunger 500, and the front end of the piston 600 corresponds to the formulation receiving cavity 310 of the formulation receiving part 300, in this embodiment, the front end of the piston 600 is inserted into the formulation receiving cavity 310 in the initial state.
In the initial state, radial engaging portion 220 is located at the first position such that outer sleeve 200 and inner sleeve 400 are in a locked state, and outer sleeve 200 cannot axially slide relative to inner sleeve 400. When the operator pushes the syringe plunger 500 to axially slide toward the front end of the inner sleeve 400, the piston 600 slides forward along the formulation receiving cavity 310, and the injection needle 100 is always maintained at the original position because the outer sleeve 200 is restricted from sliding by the radial engaging part 220. When syringe plunger 500 enters outer sleeve 200, radial engaging portion 220 is forced outwardly by syringe plunger 500 to disengage from the first position to release the axial sliding restriction of outer sleeve 200, at which time outer sleeve 200 and inner sleeve 400 are released from the locked condition, and outer sleeve 200 is able to slide toward the rear end of inner sleeve 400, driving needle 100 out of the subcutaneous tissue.
In this embodiment, in order to enable the radial engaging portion 220 to be located at the first position in the initial state and to be able to be separated from the first position when receiving the force of the syringe plunger 500, as shown in fig. 2 and 3, a stopper elastic arm 230 is provided on the wall of the outer sleeve 200, one end of the stopper elastic arm 230 is connected to the wall of the outer sleeve 200, the other end is a free end having a radial swinging space, and the radial engaging portion 220 is provided at the free end of the stopper elastic arm 230. The elastic stop arm 230 is made of a material with a certain elasticity, such as plastic, so that the elastic stop arm can deform when a certain force is applied to the elastic stop arm, so as to drive the radial clamping portion 220 to swing outwards to separate from the first position. Of course, it is not necessary that radial engaging portion 220 is connected to outer sleeve 200 by elastic stopper arm 230, and in other embodiments, radial engaging portion 220 may be connected to the wall of outer sleeve 200 in a brittle manner, and when radial engaging portion 220 is pushed outward by syringe plunger 500 to a certain extent, the portion of radial engaging portion 220 connected to outer sleeve 200 in a brittle manner breaks, so that radial engaging portion 220 is separated from the first position, and the locked state of outer sleeve 200 and inner sleeve 400 is released.
In this embodiment, in order to achieve the locked and unlocked states of the radial engaging portion 220 and the inner sleeve 400, further, the radial engaging portion 220 is provided with a locking groove 221, and a notch of the locking groove 221 faces the inside of the outer sleeve 200. As shown in fig. 4 and fig. 5, the wall of the inner sleeve 400 is provided with a front transverse bridge 410, and when the radial clamping portion 220 is located at the first position, the front transverse bridge 410 is located in the clamping groove 221. In other embodiments, the positions of the clamping groove 221 and the front transverse bridge 410 may be interchanged, and the locked and unlocked states of the radial clamping portion 220 and the inner sleeve 400 may be achieved, for example, the front transverse bridge 410 is disposed on the end surface of the radial clamping portion 220 facing the inner portion of the outer sleeve 200, the clamping groove 221 is disposed on the outer side of the wall of the inner sleeve, and the outer sleeve 200 is locked with the inner sleeve 400 through the radial clamping portion 220 when the front transverse bridge 410 is located in the clamping groove 221; when the front bridge 410 is disengaged from the locking groove 221, the radial engaging portion 220 is unlocked from the inner sleeve 400.
Further, as shown in fig. 3, a slant surface 222 is provided at a side of the clamping groove 221 facing the rear of the outer sleeve 200, the slant surface 222 extends from the rear to the front toward the inside of the outer sleeve 200, and as shown in fig. 8 and 9, the front end of the syringe push rod 500 has a pushing portion 510 capable of contacting with the slant surface 222. When the syringe plunger 500 slides forward from the rear end, the pushing portion 510 of the syringe plunger 500 contacts the inclined surface 222 and applies a pushing force to the front end to the inclined surface 222, and the pushing force generates a component force radially outward on the inclined surface 222 to swing the radially engaging portion 220 outward and separate from the first position. Of course, the pushing portion 510 and the inclined surface 222 may be interchanged, for example, the inclined surface 222 is disposed at the front end of the syringe plunger 500, the pushing portion 510 is disposed at the side of the clamping groove 221 towards the rear of the outer sleeve 200, and when the syringe plunger 500 slides forward from the rear end, the pushing portion 510 slides along the inclined surface 222, so that the radial clamping portion 220 swings outwards to separate from the first position.
In this embodiment, the syringe push rod 500 is disposed inside the inner sleeve 400, as shown in fig. 4, the wall of the inner sleeve 400 is provided with an axially extending sliding slot 420, as shown in fig. 8, the pushing portion 510 is a protruding block protruding radially outwards and disposed at the front end of the syringe push rod 500, the protruding block protrudes into the sliding slot 420, when the radial engaging portion 220 is located at the first position, the inclined surface 222 is located in the sliding slot 420, the front transverse bridge 410 is located at the front end of the sliding slot 420, in the initial state, as shown in fig. 14 and 15, the radial engaging portion 220 is located at the first position, the front transverse bridge 410 is located in the clamping groove 221, and the inclined surface 222 is located in the sliding slot 420 and faces the rear of the outer sleeve 200; when the syringe plunger 500 slides toward the front end of the inner sleeve 400, the pushing portion 510 slides forward in the sliding slot 420, and when the pushing portion 510 contacts the inclined surface 222, a radially outward pushing force is generated on the inclined surface 222, and the inclined surface 222 and the locking groove 221 move outward until the inclined surface 222 is disengaged from the sliding slot 420, at which time the radially engaging portion 220 is moved away from the first position, and the outer sleeve 200 and the inner sleeve 400 are unlocked, as shown in fig. 16 and 17.
In this embodiment, when the outer sleeve 200 and the inner sleeve 400 are unlocked, the operator pulls the outer sleeve 200 backward to slide in the rear end direction of the inner sleeve 400, and then the inclined surface 222 and the clamping groove 221 pass over the pushing portion 510 and return to the sliding long hole 420 under the driving of the elastic stop arm 230, a rear transverse bridge 430 is disposed in the sliding long hole 420 near the rear end of the inner sleeve 400, the rear transverse bridge 430 has a width matching with the clamping groove 221, and when the outer sleeve 200 slides backward to the limit position, the inclined surface 222 passes over the rear transverse bridge 430, the rear transverse bridge 430 enters into the clamping groove 221, and the radial clamping portion 220 is located at the first position to lock the outer sleeve 200 and the inner sleeve 400 again, as shown in fig. 16 and 17. At this point, needle 100 has been removed from the subcutaneous tissue and the implant syringe is completed with the injection of the formulation, and outer sleeve 200 and inner sleeve 400 are again locked to prevent the implant syringe from being reused.
In this embodiment, outer sleeve 200 has two axially sliding limit positions relative to inner sleeve 400, wherein in the initial state, outer sleeve 200 is in a forward limit position relative to inner sleeve 400 and in the end state when outer sleeve 200 slides rearward relative to inner sleeve 400 to a rearward limit position. When outer sleeve 200 is at any one of the extreme positions, radial engaging portion 220 is at the first position to restrict axial sliding of outer sleeve 200, and locking outer sleeve 200 with inner sleeve 400 in the initial state is to keep needle 100 at the original position all the time when pushing syringe plunger 500 to slide axially toward the front end of inner sleeve 400, so that the preparation can be pushed to the preset position by piston 600; the outer sleeve 200 is again locked with the inner sleeve 400 in the stopped state in order to restrict the forward sliding of the injection needle 100, prevent the needle from stabbing a person, and prevent the syringe from being secondarily used.
As shown in fig. 18, when outer sleeve 200 is slid toward the rear end of inner sleeve 400 to the extreme position, the front end of plunger 600 protrudes from the front end of needle 100, and in the end state, the front end of plunger 600 protrudes from the front end of needle 100, so that the sharp front end of needle 100 can be prevented from stabbing a person.
As shown in fig. 4 and 6, in this embodiment, the inner sleeve 400 comprises an inner sleeve front portion 440 and an inner sleeve rear portion 450, wherein the inner sleeve front portion 440 comprises a head 441 and two symmetrically disposed connecting rods 442. As shown in fig. 2, the front end of outer sleeve 200 has two through holes penetrating the inside, two connecting rods 442 respectively pass through the through holes and enter into outer sleeve 200 to be fixedly connected with the front end of inner sleeve rear portion 450, and head 441 is sleeved outside needle base 210 at the front end of outer sleeve 200. In this embodiment, the front cross bridge 410, the sliding long hole 420, and the rear cross bridge 430 are all provided on the wall of the inner sleeve rear portion 450. When outer sleeve 200 slides in the direction of the rear end of inner sleeve 400, two connecting rods 442 protrude forward from the through holes at the front end of outer sleeve 200, and head 441 protrudes in the direction of the front end of injection needle 100, as shown in fig. 18, and in the end state, head 441 approaches the front end of injection needle 100, further avoiding the stabbing of injection needle 100.
As shown in fig. 1, the implant syringe further comprises a needle protection cap 700, and an insertion structure is provided between the needle protection cap 700 and the outer wall of the front portion of the outer sleeve 200, wherein the insertion structure is used for fixedly connecting the needle protection cap 700 to the front portion of the outer sleeve 200, and the needle protection cap 700 can protect the needle 100 before and after the use of the syringe, so as to prevent the needle 100 from being polluted and from being needled.
Referring to fig. 2 and 10, in this embodiment, a plurality of short slots 710 are uniformly formed in the circumferential direction at the opening of the needle protection cap 700, a plurality of ribs 240 are circumferentially distributed on the outer wall of the front portion of the outer sleeve 200, the ribs 240 and the short slots 710 form an insertion structure, and when the needle protection cap 700 is covered on the front portion of the outer sleeve 200, the ribs 240 are inserted into the short slots 710, and the needle protection cap 700 is connected with the outer sleeve 200.
Meanwhile, if the inner sleeve 400 and the outer sleeve 200 are relatively slid by an external force in an initial state, the radial engaging portion 220 is damaged, and in order to avoid such a situation, it is necessary to limit the relative sliding of the inner sleeve 400 and the outer sleeve 200 in the initial state. In this embodiment, as shown in figures 6 and 7, the head 441 of the inner sleeve forward portion 440 is tapered, the head 441 having a pair of long axis outer edges 4411 that are radially wider and a pair of short axis outer edges 4412 that are radially narrower; as shown in fig. 11, an abutment portion 720 is provided on the inner wall of the needle protection cap 700, and in the initial state, when the needle protection cap 700 is covered on the front end of the outer sleeve 200, the abutment portion 720 on the inner wall of the needle protection cap 700 abuts against the long axis outer edge 4411 of the head 441, at this time, the needle protection cap 700 limits the inner sleeve 400 from sliding forward relative to the outer sleeve 200, so as to avoid the impact damage to the radial engaging portion 220 caused by the relative sliding generated when the inner sleeve 400 or the outer sleeve 200 receives the external impact before the syringe is used. In the end state, the needle protection cap 700 may be covered on the front end of the outer sleeve 200, and since the head 441 extends forward relative to the outer sleeve 200 at this time, in order to avoid the abutment 720 on the inner wall of the needle protection cap 700 from abutting against the long axis outer edge 4411 of the head 441, the needle protection cap 700 may be rotated by a certain angle, for example, by 90 °, so that the abutment 720 is opposite to the side where the short axis outer edge 4412 is located, and the head 441 may smoothly enter the interior of the needle protection cap 700.
As shown in fig. 12, in the present embodiment, the preparation receiving portion 300 is a cylindrical body, and two symmetrical slits 320 are formed on the side wall of the cylindrical body, and the slits 320 extend along the preparation receiving portion 300 and the axial direction and are communicated with the preparation accommodating cavity 310. The slit 320 allows the side wall of the formulation receiving part 300 to elastically deform, and when the formulation is loaded into the formulation receiving cavity 310 in the formulation receiving part 300, the side wall of the formulation receiving part 300 elastically deforms to clamp the formulation, thereby preventing the formulation from falling off from the formulation receiving part 300 in an initial state.
At the same time, the syringe plunger 500 should be prevented from sliding axially relative to the inner sleeve 400 under external impact prior to use of the syringe. In this embodiment, the implant syringe further includes a push rod stop member 800, as shown in FIG. 1, the push rod stop member 800 being removably mountable to the inner sleeve 400 to limit axial sliding movement of the syringe push rod 500 toward the forward end of the inner sleeve 400. Specifically, as shown in fig. 13 and 4, the push rod stopping member 800 includes a snap ring 810, a latch 820 and a handle 830, where the latch 820 and the handle 830 are respectively disposed on an inner wall and an outer wall of the snap ring 810; the rear end of the inner sleeve rear part 450 is provided with a jack 451, before the syringe is used, the clamp ring 810 is clamped on the outer side of the inner sleeve rear part 450, so that the bolt 820 enters the inner sleeve rear part 450 from the jack 451, thereby limiting the syringe push rod 500 to slide towards the front end of the inner sleeve 400 and preventing the syringe push rod 500 from sliding axially relative to the inner sleeve 400 under the impact of external force, so that the syringe is invalid; in use, pulling the handle 830 disengages the snap ring 810 from the inner sleeve rear 450, and the latch is removed from the receptacle 451, releasing the limit on the forward sliding of the syringe plunger 500 for use.
The working process of the embodiment comprises the following three stages:
1. Initial state
As shown in fig. 14 and 15, the implant syringe of the present embodiment is in an initial state before use, in which the radial engaging portion 220 of the outer sleeve 200 is located in the first position, that is, the engaging groove 221 and the inclined surface 222 are located in the sliding long hole 420 of the inner sleeve rear portion 450, the front transverse bridge 410 is located in the engaging groove 221, and the outer sleeve 200 and the inner sleeve 400 are locked together by the radial engaging portion 220.
In use, push rod stop member 800 is removed from inner sleeve 400 and needle shield 700 is removed from outer sleeve 200. The injection needle 100 is inserted into subcutaneous tissue of a human or animal body, and the head 441 of the inner sleeve front 440 abuts against the outer side of the subcutaneous tissue, pushing the syringe plunger 500 to slide toward the front end of the inner sleeve 400, and pushing the preparation from the preparation receiving section 300 into the injection needle 100.
2. Intermediate state
As shown in fig. 16 and 17, when syringe plunger 500 is slid forward into outer sleeve 200, pushing portion 510 at the forward end of syringe plunger 500 contacts ramp 222 and exerts a radially outward force on ramp 222, which force causes stop spring arm 230 to swing outward to move radially engaging portion 220 out of the first position, at which time outer sleeve 200 is unlocked from inner sleeve 400, syringe plunger 500 is slid forward to the limit position, and the formulation is pushed into needle 100 by piston 600.
Then, outer sleeve 200 is pulled backward, so that outer sleeve 200 slides toward the rear end of inner sleeve 400, and injection needle 100 slides backward together with outer sleeve 200, gradually moving out of the subcutaneous tissue, and since inner sleeve 400, syringe plunger 500 and piston 600 are immobilized with respect to the subcutaneous tissue at this time, the preparation is released from the front end of injection needle 100 and left in the subcutaneous tissue during the backward sliding of injection needle 100.
3. Termination state
As shown in fig. 18 and 19, when outer sleeve 200 is slid backward to the limit position, the front end of plunger 600 is extended from the front end of needle 100, and inclined surface 222 of radial engaging portion 220 is slid backward along sliding long hole 420 until passing rear cross bridge 430, so that rear cross bridge 430 enters into engaging groove 221, at this time radial engaging portion 220 is again in the first position to lock outer sleeve 200 and inner sleeve 400 again, and needle protecting cap 700 is rotated by 90 ° to cover the front end of outer sleeve 200, thus completing the whole use process.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (14)
1. An implantable injector, comprising: an injection needle (100), an outer sleeve (200), a preparation receiving part (300), an inner sleeve (400), a syringe push rod (500) and a piston (600),
The injection needle (100) is fixedly connected with the front end of the outer sleeve (200), the preparation receiving part (300) is fixedly arranged inside the outer sleeve (200), and the front end of the preparation accommodating cavity (310) in the preparation receiving part (300) is communicated with the inner cavity of the injection needle (100) through the front end of the outer sleeve (200);
the outer sleeve (200) is axially and slidably arranged outside the inner sleeve (400), a radial clamping part (220) extending inwards is arranged on the inner wall of the outer sleeve (200), and the radial clamping part (220) is provided with a first position for limiting the axial sliding of the outer sleeve (200);
The syringe push rod (500) and the inner sleeve (400) are axially and slidably arranged, the piston (600) is fixedly arranged inside the syringe push rod (500), and the front end of the piston (600) corresponds to the preparation accommodating cavity (310) of the preparation receiving part (300);
When the syringe push rod (500) axially slides towards the front end of the inner sleeve (400), at least a part of the structure of the inner sleeve (400) is exposed out of the outer sleeve (200), the piston (600) slides forwards along the preparation accommodating cavity (310), and when the syringe push rod (500) enters the inner sleeve (200), the radial clamping part (220) is subjected to the outward acting force of the syringe push rod (500) and is separated from the first position so as to release the axial sliding restriction of the outer sleeve (200).
2. The implant syringe according to claim 1, characterized in that a stop elastic arm (230) is provided on the wall of the outer sleeve (200), one end of the stop elastic arm (230) is connected to the wall of the outer sleeve (200), the other end is a free end with a radial swinging space, and the radial clamping portion (220) is provided at the free end of the stop elastic arm (230).
3. The implant syringe according to claim 2, characterized in that the radial engagement portion (220) is provided with a clamping groove (221), a notch of the clamping groove (221) faces towards the inside of the outer sleeve (200), the wall of the inner sleeve (400) is provided with a front transverse bridge (410), and when the radial engagement portion (220) is located at the first position, the front transverse bridge (410) is located in the clamping groove (221).
4. An implant syringe according to claim 3, characterized in that the side of the clamping groove (221) facing the rear part of the outer sleeve (200) is provided with a bevel (222), the bevel (222) extends from the rear to the front towards the inside of the outer sleeve (200), and the front end of the syringe push rod (500) is provided with a pushing part (510) capable of contacting with the bevel (222).
5. The implant syringe of claim 4, wherein the syringe plunger (500) is disposed inside the inner sleeve (400), an axially extending sliding slot (420) is formed in a wall of the inner sleeve (400), the pushing portion (510) is disposed in the sliding slot (420), and the inclined surface (222) is disposed in the sliding slot (420) when the radial engaging portion (220) is disposed in the first position.
6. The implant syringe of claim 5, wherein a rear cross bridge (430) is disposed within the sliding slot (420) proximate the rear end of the inner sleeve (400), the rear cross bridge (430) having a width that is compatible with the slot (221).
7. The implant syringe of any one of claims 1 to 6, wherein the outer sleeve (200) has two axially sliding extreme positions relative to the inner sleeve (400), the radial snap-in portion (220) being in the first position to limit axial sliding of the outer sleeve (200) when the outer sleeve (200) is in either extreme position.
8. The implant syringe according to claim 7, characterized in that the front end of the piston (600) protrudes from the front end of the injection needle (100) when the outer sleeve (200) is slid to a limit position towards the rear end of the inner sleeve (400).
9. The implant syringe of claim 1, wherein the inner sleeve (400) comprises an inner sleeve front portion (440) and an inner sleeve rear portion (450), a rear end of the inner sleeve front portion (440) being inserted into the outer sleeve (200) from a front end thereof in fixed connection with a front end of the inner sleeve rear portion (450);
The front part (440) of the inner sleeve is sleeved outside the injection needle (100).
10. The implant syringe of claim 9, further comprising a needle protection cap (700), wherein a mating structure is provided between the needle protection cap (700) and the outer front wall of the outer sleeve (200), the mating structure being used to fixedly connect the needle protection cap (700) to the front of the outer sleeve (200).
11. The implant syringe of claim 10, wherein the forward end of the inner sleeve forward portion (440) has a tapered head (441), the head (441) having a pair of long axis outer edges (4411) that are radially wider and a pair of short axis outer edges (4412) that are radially narrower;
an abutting part (720) which is in abutting fit with the outer edge (4411) of the long shaft of the head (441) is arranged on the inner wall of the injection needle protective cap (700).
12. The implant syringe according to claim 10, wherein a plurality of short slots (710) are uniformly arranged in the circumferential direction at the opening of the injection needle protecting cap (700), a plurality of ribs (240) are distributed on the outer wall of the front part of the outer sleeve (200) in the circumferential direction, and the ribs (240) and the short slots (710) form an inserting structure.
13. The implant syringe of claim 1, wherein the preparation receiving portion (300) is a cylindrical body, and two symmetrical slits (320) are formed in a side wall of the cylindrical body, and the slits (320) extend along the preparation receiving portion (300) and the axial direction.
14. The implant syringe of claim 1, further comprising a pushrod stop member (800), the pushrod stop member (800) being removably mountable to the inner sleeve (400) to limit axial sliding movement of the syringe pushrod (500) toward the forward end of the inner sleeve (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010211031.7A CN113440687B (en) | 2020-03-24 | 2020-03-24 | Implantable injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010211031.7A CN113440687B (en) | 2020-03-24 | 2020-03-24 | Implantable injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113440687A CN113440687A (en) | 2021-09-28 |
| CN113440687B true CN113440687B (en) | 2024-05-03 |
Family
ID=77806324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010211031.7A Active CN113440687B (en) | 2020-03-24 | 2020-03-24 | Implantable injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113440687B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5215535A (en) * | 1992-05-20 | 1993-06-01 | Gettig Technologies Incorporated | Needle protector apparatus |
| CN1411384A (en) * | 1999-12-18 | 2003-04-16 | 盖普拉斯特有限公司 | Implant syringe |
| CN104645462A (en) * | 2015-02-28 | 2015-05-27 | 苏州贝尔一锋医疗器械有限公司 | Injector matched fixing sleeve |
| CN109420244A (en) * | 2017-08-19 | 2019-03-05 | 盖普拉斯特股份有限公司 | Implant syringe |
| CN110893252A (en) * | 2018-09-12 | 2020-03-20 | 普昂(杭州)医疗科技有限公司 | Active self-locking type injector |
-
2020
- 2020-03-24 CN CN202010211031.7A patent/CN113440687B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5215535A (en) * | 1992-05-20 | 1993-06-01 | Gettig Technologies Incorporated | Needle protector apparatus |
| CN1411384A (en) * | 1999-12-18 | 2003-04-16 | 盖普拉斯特有限公司 | Implant syringe |
| CN104645462A (en) * | 2015-02-28 | 2015-05-27 | 苏州贝尔一锋医疗器械有限公司 | Injector matched fixing sleeve |
| CN109420244A (en) * | 2017-08-19 | 2019-03-05 | 盖普拉斯特股份有限公司 | Implant syringe |
| CN110893252A (en) * | 2018-09-12 | 2020-03-20 | 普昂(杭州)医疗科技有限公司 | Active self-locking type injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113440687A (en) | 2021-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2311700C (en) | Protective device for injection or aspiration needle | |
| US20010031949A1 (en) | Protective device for a prefilled injection syringe | |
| CA2653755C (en) | Cap for injection device | |
| JP5492902B2 (en) | Universal syringe with retractable needle | |
| JP3002531B2 (en) | Syringe | |
| US4767413A (en) | Dental syringe having an automatically retractable needle | |
| US7329238B2 (en) | Safety needle medical bearing devices | |
| EP1349590B1 (en) | Auto-injector | |
| US20020004652A1 (en) | Protective device for a fillable injection syringe | |
| US20120283698A1 (en) | Syringe guard with selected needle configurations | |
| US6537253B1 (en) | Cannular arrangement | |
| AU2002222872A1 (en) | Auto-injector | |
| CA2382459A1 (en) | Combination safety needle assembly and medical apparatus | |
| JP6125513B2 (en) | Needle safety device | |
| CA2574298C (en) | Syringe | |
| US4878899A (en) | Disposable syringe for one-time use | |
| CN113440687B (en) | Implantable injector | |
| AU2005242137B2 (en) | Safety needle medical bearing devices | |
| US20190282147A1 (en) | Blood Collection Tube Holder with Single Needle | |
| EP1364668A1 (en) | Safe injector and injection needle for safe injector | |
| CN115227913B (en) | Automatic injector and injection syringe thereof | |
| CN117815492A (en) | Auto-injector for automatic injection of a product into an injection site | |
| JP2008513069A (en) | Syringe | |
| WO2023198567A1 (en) | Cap for removing a needle shield from a medical container, autoinjector including said cap, and method for assembling said medical container and said autoinjector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |