WO2019205701A1 - 一种保护装置及安全型注射器 - Google Patents

一种保护装置及安全型注射器 Download PDF

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Publication number
WO2019205701A1
WO2019205701A1 PCT/CN2018/124311 CN2018124311W WO2019205701A1 WO 2019205701 A1 WO2019205701 A1 WO 2019205701A1 CN 2018124311 W CN2018124311 W CN 2018124311W WO 2019205701 A1 WO2019205701 A1 WO 2019205701A1
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WO
WIPO (PCT)
Prior art keywords
protection device
push rod
ring
needle
buckle
Prior art date
Application number
PCT/CN2018/124311
Other languages
English (en)
French (fr)
Inventor
张淑茗
Original Assignee
Chang Shu Ming
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chang Shu Ming filed Critical Chang Shu Ming
Publication of WO2019205701A1 publication Critical patent/WO2019205701A1/zh

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    • 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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/344—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets
    • 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
    • A61M5/5066—Means for preventing re-use by disconnection of piston and 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
    • A61M5/50—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
    • A61M5/5066—Means for preventing re-use by disconnection of piston and piston-rod
    • A61M2005/5073—Means for preventing re-use by disconnection of piston and piston-rod by breaking or rupturing the connection parts

Definitions

  • the invention belongs to the technical field of syringes, and in particular relates to a protection device for a safety type syringe and a use thereof.
  • the safety syringe is operated by using a mechanism at the front end of the push rod to generate a snap action with the needle seat set.
  • the mechanism of the push rod and the needle seat group is engaged.
  • the push rod will be pulled, and the needle set containing the injection needle will be moved into the cylinder to achieve the function of the safety syringe. Therefore, before the safety syringe is used, the push rod should be prevented from being affected by external force, for example: assembly, packaging, transportation process Collision or human error causes the push rod to move forward and generate a buckle with the needle seat set. In order to avoid accidental contact, the syringe function is broken.
  • the hollow cylinder 1 is internally provided with a push rod 2 .
  • the head end of the cylinder body 1 is provided with a needle seat set 7 , and the needle seat set 7 is provided with a fastening portion 9 and the push
  • a pusher head 6 is disposed at the front end of the rod 2, and the pusher head 6 is provided with a buckle group portion 8 at a predetermined position, and the pusher head 6 is movable to extend through a specific point of the needle holder group 7, and the buckle of the pusher head 6
  • the group portion 8 is a fastening portion 9 that is buckled to the needle holder group 7, and the end of the barrel body 1 is provided with two ends of the horizontal sheet form.
  • the end of the push rod 2 is provided with a push end 4, so that the end edge 3 of the push rod 2 is opposite to the end end and the push rod 2 is provided with a limit piece C, wherein the limit piece C is set There is a side connecting portion C1 which is in contact with the push rod 2, and the limiting piece C is provided with a bottom connecting portion C2 which is in contact with the pushing end 4, and the top end of the limiting piece C corresponds to the cylindrical body.
  • the end of the end 5 of the first end is provided with an upper end C3.
  • the upper and lower limits of the limiting piece C are located at the pushing end 4 of the push rod 2 and the end end 5 of the barrel 1.
  • the buckle portion 8 of the pusher head 6 is limited before the position of the buckle portion 9 of the needle holder group 7 is reached. Therefore, before the syringe is to perform the injection function, the limit piece C must be broken.
  • the side connecting portion C1 and the bottom connecting portion C2 can be used behind each other; however, the side connecting portion C1 and the bottom connecting portion C2 of the contact piece C are formed by injection molding with the push rod 2, so the limiting piece
  • Each of the side connecting portions C1 and the bottom connecting portion C2 of C has a thickness unevenness. When the contact between the side connecting portion C1 and the bottom connecting portion C2 is too thin, the bonding force is small, and if it is too thick, it is not easily broken.
  • the object of the present invention is to solve the problems in the prior art, and provide a protection device and a safety type syringe; which can prevent the syringe from being damaged when the push rod is advanced due to an external force factor; and the safety device can be protected after the injection is completed. Inserted into the opening position of the front end of the cylinder, so that the internal space of the cylinder is isolated from the outside, and the used needle-replaceable injection parts and residual liquid are sealed in the cylinder to prevent leakage, and the medical personnel and medical waste can be prevented. The use of the handling personnel for needle accidents.
  • the present invention adopts the following technical solutions.
  • a protection device comprises a base, the base is provided with a joint portion; an open-shaped tapered groove is arranged at the bottom of the base, and a limit stop column protrudes from the center of the inner bottom end surface of the tapered groove; An intermediate ring portion is disposed on the surface, and the protection device is different from the end of the tapered groove to provide a driving end.
  • a guiding portion is disposed between the intermediate ring portion and the connecting portion of the protection device, and an engaging portion is disposed between the intermediate ring portion and the driving end portion, the intermediate ring portion and the buckle portion
  • the intersecting position is provided with a stepped ring retaining edge; the driving end of the protecting device has a flange shape, and a non-circular groove is disposed in the driving end.
  • the joint portion of the protection device may be in the form of an external thread; and the joint portion of the protection device may be provided with a screw-locking butterfly form on both sides; and the joint portion may have a smooth surface shape.
  • the safety type injector comprises a hollow cylinder, a needle-changeable needle hub set at the front end of the cylinder body, and a push rod displaceable inside the cylinder body; wherein the needle holder group has a constant hole inside,
  • the push rod is provided with a pusher head at one end of the through hole, and the pusher head can be inserted into the through hole of the needle seat set; and the predetermined section ring of the through hole of the needle seat set is provided with an embedded a buckle portion, the predetermined position of the pusher head of the push rod is provided with a buckle group corresponding to the buckle portion, and the buckle portion of the push rod is advanced by the pusher head to advance through the through hole of the needle holder group and reaches one After the preset depth is applied, the push rod can be inserted into the inner portion of the cylinder with respect to the needle socket group after the buckle portion is correspondingly fastened to the buckle portion; and the needle seat group is different from the one end of the buckle portion.
  • the joint of the protection device is a joint that can be correspondingly assembled, and the joint corresponds to the interchangeable needle assembly of the needle set of the safety syringe Providing; when the joint portion of the protection device is assembled to the interchangeable needle assembly portion of the needle holder set, the protection device
  • the limit post is located at the end of the pusher head of the push rod, and the top portion of the push rod is limited to a snap position of the buckle portion that does not reach the needle seat group.
  • the joint portion of the protection device may be in the shape of an external thread
  • the interchangeable needle assembly portion of the needle holder set is in the shape of an internal thread of the matching screw group
  • the joint portion of the protection device may be The two sides may respectively be provided with a screw-locking butterfly form, and the interchangeable needle assembly portion of the needle seat set is provided with an internal thread shape of the matching portion of the matching screw group; or the joint portion has a smooth surface shape, and A tapered column protrudes from one end of the needle holder group, and the tapered column of the protection device is fastened to the tapered column by a tapered cone.
  • the push rod is capable of enabling the retracting function relative to the needle seat set
  • the needle seat set includes a limiting member and a ring rotating member, and the limiting member and the ring rotating member respectively a pivoting portion and a pivoting portion are provided
  • the outer edge of the ring member is provided with at least one L slot at a predetermined position
  • the L slot includes an open end and a closed end
  • the closed end is disposed on the other side a stop end
  • the inner wall of the cylinder is provided with at least one stopper corresponding to the L slot
  • the positioning block can be positioned with respect to the block of the cylinder, when The L-slot of the ring-turning member can be non-positioned with respect to the block of the cylinder when the ring is turned to the open end
  • the outer edge of the limiting member is provided with at least one U-shaped limiting seat
  • the inner wall of the cylinder is provided with at least one U-shaped limiting seat
  • the limiting piece of the limiting piece When the limiting piece of the limiting piece is embedded in the limiting piece of the barrel, the limiting piece can be in a restricted loop mode with respect to the barrel;
  • the ring rotating part The interior is hollow, and a locking portion is disposed at a predetermined section of the inner circumferential surface, and the adjacent portion of the fastening portion is provided with a rotating portion, and the rotating portion is provided with a a plurality of guiding slopes;
  • the limiting member is internally provided with a through hole, wherein the predetermined section of the through hole is provided with a non-circular section of a polygonal cross section;
  • the pusher head of the push rod is provided with a limit from the top to the bottom a non-circular section of the non-circular section of the rotating member, a buckle portion corresponding to the engaging portion of the ring-turning member, and a dialing portion matching the rotating portion of the ring-turning member, wherein the dialing portion
  • the rotating portion is
  • the joint portion of the protection device is a replaceable needle assembly portion assembled to the needle holder group, so that the protection device is The limit post is located at the end of the pusher head of the push rod, and the top portion of the push rod is limited to a snap position of the buckle portion that does not reach the needle seat group. .
  • the protection device is used after the safety syringe is used to complete the injection, and the push rod enables the retracting function to pull the needle holder into the interior of the cylinder and insert the protection device into the front end opening position of the cylinder.
  • the intermediate ring portion can be fastened to the inner circumferential wall surface of the front end of the cylinder.
  • the problem to be solved by the present invention is that the side connecting portion and the bottom connecting portion of the contact piece of the prior art safety type syringe are injection molded with the push rod, so each side of the limiting piece
  • the connecting portion and the bottom connecting portion may have uneven thickness. If the joint between the side connecting portion and the bottom connecting portion is too thin, the bonding force is small, and if the thickness is too thick, it is not easy to be broken. Therefore, the limiting piece for the safety syringe of the prior art is used.
  • the structure has unstable factors to improve the breakthrough.
  • the joint portion of the protection device is a replaceable needle assembly portion assembled to the needle holder group, so that the limit column of the protection device is offset to the end of the pusher head of the push rod.
  • the buckle portion of the push rod is limited to a snap position that does not reach the buckle portion of the needle seat group, so as to prevent the push rod from advancing when the push rod is advanced due to an external force factor.
  • the locking portion of the needle seat group generates a buckle to cause damage to the syringe; and after the safety syringe is finished, the protection device can be inserted into the front end opening position of the cylinder body, so that the internal space of the cylinder body is isolated from the outside, and the use The completed needle-replaceable injection parts and residual liquid are enclosed in the cylinder to prevent leakage, and the medical personnel and the medical waste disposal personnel can be prevented from being used for needle accidents.
  • Figure 1 is a cross-sectional view showing the structure of a stopper of a prior art safety type syringe.
  • Figure 2 is a cross-sectional view of the prior art safety syringe with the stop tab structure separated from the syringe.
  • Figure 3 is an exploded perspective view of the protective device of the safety syringe of the present invention.
  • Figure 4 is a perspective view of the protective device of the safety syringe of the present invention.
  • Fig. 5 is another perspective view of the protective device of the safety syringe of the present invention.
  • Figure 6 is a cross-sectional view showing the protection device of the safety syringe of the present invention.
  • Figure 7 is a cross-sectional view showing the state in which the safety syringe of the present invention and the protective device are coupled to each other.
  • Figure 8 is a cross-sectional view showing the safety syringe and the protective device of the present invention in a relatively separated state.
  • Figure 9 is a cross-sectional view of the safety syringe assembly of the present invention with a needle changeable syringe.
  • Figure 10 is a cross-sectional view of the safety syringe of the present invention for taking a liquid medicine by a needle exchangeable syringe.
  • Figure 11 is a cross-sectional view showing the pusher head of the safety syringe of the present invention being pushed forward and the pusher head is snapped to the needle hub set.
  • Figure 12 is an enlarged plan view a of Figure 11 showing a cross-sectional view of the pusher head being snapped onto the needle hub set.
  • Fig. 13 is a cross-sectional view showing the breaking portion of the push rod of the push rod after the injection of the safety syringe of the present invention is performed by retracting the push rod to pull the needle holder group and the injection member into the inside of the cylinder.
  • Fig. 14 is a cross-sectional view showing the operation of the safety type syringe of the present invention in a state of being retracted after injection to cause the head end of the barrel to be inserted into the protection device.
  • Fig. 15 is a cross-sectional view showing the operation of the safety syringe of the present invention in a state in which the head end of the barrel is inserted into the protection device after being injected.
  • Figure 16 is an enlarged schematic view b of Figure 15 showing the relative position of the head end of the barrel of the protection device.
  • Figure 17 is a diagram showing a structural variation of Figure 16;
  • Figure 18 is a further embodiment of the structural change of the safety syringe of the present invention having no interchangeable needle assembly.
  • the tapered groove of the protection device is fastened to the hollow cone by a tapered cone, so that the protection device is The limit bar is just offset from the cross-sectional view of the pusher head at the end of the pusher.
  • Fig. 19 is a perspective view showing still another embodiment of the protection device of the present invention, which shows that the joint portion can be in the form of a screw lock butterfly.
  • Fig. 20 is a cross-sectional view showing still another embodiment of the structural change of the joint portion of the protective device of the present invention.
  • buckle group 28 non-circular segment
  • FIG. 3-16 are preferred embodiments of the protective device for the safety syringe of the present invention.
  • the embodiments are for illustrative purposes only and are not limited by the structure, and are included in the patent application. :
  • a safety syringe A comprising a hollow cylinder 10, a needle-changing needle set B disposed at the front end of the chamber 12 of the cylinder 10, and a push rod 20 displaceable inside the cylinder 10;
  • the needle holder group B is internally provided with a constant hole 46, and the push rod 20 is provided with a pusher head 29 at one end of the through hole 46, and the pusher head 29 can be inserted into the through hole of the needle holder group B. 46.
  • the predetermined section of the through hole 46 of the needle holder group B is provided with a fastening portion 37.
  • the predetermined position of the pusher head 29 of the push rod 20 is provided with a buckle group portion 27 corresponding to the fastening portion 37.
  • the buckle assembly portion 27 of the push rod 20 can be advanced to the through hole 46 of the needle holder group B by a pusher head 29 to reach a predetermined depth, and the buckle assembly portion 27 is correspondingly engaged with the buckle portion. 37, the push rod 20 can enable the retracting function to enter the inside of the cylinder 10 with respect to the needle seat group B; and the needle holder group B is different from the end of the fastening portion 37 to provide a replaceable needle assembly portion 43;
  • a protection device 70 includes a base 77.
  • the base 77 is provided with a coupling portion 78 corresponding to the movable assembly corresponding to the interchangeable needle assembly 43 of the needle holder group B of the safety syringe A; the bottom of the base 77 is provided An open-shaped tapered groove 79, and a central limiting portion 791 is protruded from the center of the inner bottom end surface of the tapered groove 79.
  • the protective device 70 has an intermediate ring portion 75 on the outer circumferential surface thereof, and the protection device 70 is different from the cone.
  • One end of the groove 79 is provided with a driving end 71;
  • the limit post 791 of the protection device 70 abuts the pusher head 29 of the push rod 20.
  • the buckle portion 27 of the push rod 20 is restrained at a snap position that does not reach the buckle portion 37 of the needle holder group B.
  • the needle hub set B includes a limiting member 40 and a ring-turning member 30, and the limiting member 40 and The ring-turning member 30 is respectively provided with a pivoting portion 41 and a pivoting portion 35 of the opposite pivoting group, and a sealing washer 44 is disposed between the limiting member 40 and the ring-turning member 30, wherein the ring-turning member 30
  • the outer edge is provided with a sealing ring 36 and at least one L slot 31.
  • the L slot 31 includes an open end 34 and a closed end 32.
  • the closed end 32 is provided with a blocking end 33 on the other side.
  • the L-slot 31 should be provided with at least one stop block 11.
  • the L-slot 31 of the ring-turning member 30 When the L-slot 31 of the ring-turning member 30 is rotated to the closed end 32, it can be positioned relative to the stop 11 of the cylinder 10, and the ring is reversed.
  • the L-slot 31 of the rotating member 30 When the L-slot 31 of the rotating member 30 is rotated to the open end 34, it can be in a non-positioning mode with respect to the stopper 11 of the cylinder 10; the outer edge of the limiting member 40 is provided with at least one U-shaped limiting seat 42 at a predetermined position.
  • the inner diameter of the cylinder 10 is opposite to the rotary seat 42 and is provided with at least one limiting piece 13 .
  • the limiting member 40 can be opposite to the rotating piece 40 .
  • the cylinder 10 is used as a limit ring rotation mode ; Rotation of the ring member 30 is hollow inside, and at a predetermined position of the inner circumferential surface of the section is provided with a fastening insert part 37, the hook portion 37 adjacent the insert section 38 is provided with a rotation receiving portion.
  • the insertion portion 37 and the rotation portion 38 of the ring member 30 can be referred to the self-rotating and retracting structure of the needle holder assembly of the CN102652849 safety syringe disclosed in the prior art 2013.12.25, and therefore will not be described in detail.
  • the rotating portion 38 is provided with a plurality of guiding slopes 39;
  • the limiting member 40 is internally provided with a through hole 46, and the predetermined portion of the through hole 46 is provided with a non-circular portion 45 having a polygonal cross section;
  • the pusher head 29 of the push rod 20 is provided with a non-circular section 28 matching the non-circular section 45 of the limiting member 40 and a locking portion 37 corresponding to the ring-turning member 30 from top to bottom.
  • each of the final abutting ends 14 being predetermined
  • a set of holes 15 are provided, and each of the set of holes 15 of each of the end abutting ends 14 can be respectively engaged with the group portion 62 of the two symmetric rail pressers 60, and the two rail press plates 60 are fastened and positioned at the end end 14 position.
  • each of the rail press plates 60 is convex a ring retaining edge 63 extends into the inner peripheral wall surface of the cylindrical body 10, and each of the rail pressing plates 60 is provided with a rail-shaped track groove 61 corresponding to the rib 21 of the push rod 20, so that the push rod 20 is When the pusher is pushed forward, the rib 21 can guide the linear rib 21 to move linearly; when the pusher head 29 of the pusher 20 enters the through hole 46 of the limiting member 40, the pusher 20 The non-circular section 28 generates a limiting rotation function by the non-circular section 45 of the limiting member 40, and the ribs 21 of the push rod 20 are guided linearly by the rail-shaped track grooves 61 so that The turning portion 24 of the push rod 20 is in a straight forward state to rotate the rotating portion 38 of the ring rotating member 30.
  • the buckle portion 27 of the push rod 20 is synchronously engaged with the ringing member 30.
  • the buckle portion 37, and at the same time, the ring member 30 is rotated to the open end 34 by an angle of rotation, so that the ring member 30 is not subjected to the positioning function of the stopper 11 of the cylinder 10,
  • the push rod 20 can enable the retracting function relative to the needle seat set B. After the retraction, the push rod 20 can be broken by bending the breaking portion 22 to prevent the syringe from being used continuously.
  • a guiding portion 751 is disposed between the intermediate ring portion 75 and the connecting portion 78 of the protection device 70, and an engaging portion 74 is disposed between the intermediate ring portion 75 and the driving end 71.
  • a stepped ring retaining edge 76 is provided at the intersection of the intermediate ring portion 75 and the latching portion 74.
  • the driving end 71 of the protection device 70 has a flange shape, and two cutting surfaces 72 are disposed at two ends of the outer edge, and a non-circular groove 73 is disposed in the driving end 71 to facilitate the user.
  • the drive end 71 is manually driven or the non-circular groove 73 is driven using a polygonal wrench tool.
  • the joint portion 78 of the protection device 70 can be in the shape of an external thread, and the interchangeable needle assembly portion 43 of the needle holder group B is in a matching internal thread configuration, wherein the safety syringe A is intended to be
  • the coupling portion 78 of the protection device 70 is screwed out of the interchangeable needle assembly portion 43
  • a screw-locking blade 51 of the replaceable needle injection member 50 is replaced to screw into the needle holder group.
  • the interchangeable needle assembly portion 43 of the B is mounted and positioned, and the screw lock butterfly 51 and the interchangeable needle assembly portion 43 of the needle hub group B are in a matching screw group form; or the joint portion 78 is smoothed.
  • the surface of the needle holder group B has a tapered post 47 protruding from one end of the needle holder group B, and is fastened to the tapered column 47 by a tapered cone 79 by the tapered groove 79 of the protection device 70.
  • the invention further encompasses the use of a protective device 70 for a safe syringe A, as shown in Figure 7, wherein the protection device 70 is used for a safe syringe A that is still in a packaged state and is not injectable.
  • the joint portion 78 of the device 70 is a replaceable needle assembly portion 43 assembled to the needle hub group B, so that the limit post 791 of the protection device 70 is located at the end of the pusher head 29 of the push rod 20.
  • the buckle portion 27 of the push rod 20 is limited to a snap position of the buckle portion 37 that does not reach the needle holder group B, so as to prevent the push rod 20 from being buckled when it is advanced due to an external force factor.
  • the locking portion 37 of the set portion 27 and the hub set B generates a buckle to cause the syringe to be broken; in addition, when the syringe is to be used, the joint portion 78 of the protection device 70 needs to be replaced by the needle of the needle holder group B.
  • the assembly portion 43 is unloaded, and the unloading method is provided in the present example in which the external threads and the internal threads are matched to each other for screwing and separation, and then the screw of the replaceable needle injection member 50 having the injection needle 52 is locked.
  • the butterfly piece 51 is screwed into the needle-changing assembly portion 43 of the needle holder group B, and the medicine solution is used to extract the injection, and then the injection is performed.
  • FIG. 9 to FIG. 13 it is a syringe injection and internal contraction function of the self-rotating and retracting structure of the needle-seat assembly of the CN102652849 safety syringe disclosed in the prior art 2013.12.25, and therefore will not be described in detail.
  • another use of the protection device 70 is that after the safety syringe A is completed, the push rod 20 enables the retraction function to make the needle holder group B and the needle changeable injection piece.
  • the 50 retraction is pulled into the inside of the cylinder 10, and the protection device 70 is inserted into the front end opening position of the cylinder 10.
  • the preferred embodiment may be to first place the protection device 70 on the table top, and then the front end of the cylinder 10
  • the protective device 70 is pressed downwards, and the tubular body 10 can be inserted into the locking portion 74 of the protective device 70 to engage and position the locking member 70 along the guiding portion 751.
  • the internal space is isolated from the outside world, and the used needle-injecting member 50 and the residual chemical solution are sealed in the cylinder 10 to prevent leakage, and the medical personnel and the medical waste disposal personnel can prevent the needle accident. use.
  • the needle holder group B and the needle changeable injection member 50 of the safety syringe A can be retracted into the interior of the cylinder 10, and then the protection device 70 is inserted into the cylinder. 10 front end opening position, and finally the push rod 20 is broken.
  • FIG. 17 which is another embodiment of the structural change of FIG. 16, when the safety syringe A is used to complete the injection, the protection device 70 is to be inserted into the front end opening position of the cylinder 10, and the end of the cylinder 10 is The inner circumferential wall surface can be fastened to the inner diameter of the front end of the cylindrical body 10 by the outer diameter of the intermediate ring portion 75 of the protection device 70 under the embodiment in which the limiting piece 13 is not provided. Together, the internal space of the cylinder 10 is isolated from the outside world.
  • FIG. 18 which is another embodiment of the present invention
  • the uninjected safety type syringe A when the uninjected safety type syringe A is to be assembled to the needle holder group B having a hollow tapered column B1 at one end, and the needle
  • the seat block B is fastened to the hollow cone column B1 by a tapered groove 79 by a tapered groove 79 of the protection device 70 in the embodiment without the replaceable needle assembly portion 43 to make the limit column 791
  • the position of the opposite end of the pusher head B2 is set to a limit.
  • the joint portion 78a of the protection device 70 can be provided with a screw-locking butterfly form on both sides.
  • the interchangeable needle assembly portion 43 of the needle hub group B is in the form of an internal thread of the matching screw group, so that the joint portion 78a in the form of the screw lock butterfly can be screwed into the internal thread.
  • the interchangeable needle assembly portion 43 of the form is in the form of an internal thread of the matching screw group, so that the joint portion 78a in the form of the screw lock butterfly can be screwed into the internal thread.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
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Abstract

一种保护装置及安全型注射器，保护装置的底座设一结合部；且该底座的锥形槽内底端面中央凸伸一限挡柱。安全型注射器包括设置于该筒体前端的针座组、及可位移于该筒体内部的推杆。针座组设有一嵌扣部，推杆的推杆头对应该嵌扣部设有一扣组部，相异于嵌扣部一端设一可换针组接部；当该保护装置的结合部组装于该可换针组接部时，限挡柱恰抵顶限位于该推杆头末端处，抵顶时恰使扣组部限位在未到达嵌扣部的相卡扣位置。

Description

一种保护装置及安全型注射器 技术领域
本发明属于注射器技术领域，尤其涉及一种安全型注射器的保护装置及其用途。
背景技术
安全型注射器的作动原理是利用推杆前端设有一机构能与针座组产生卡扣作用，当推杆向前推至特定点后，推杆与针座组的机构就会卡合在一起，完成注射后拉推杆，将使针座组含注射针移入筒体内，以达安全型注射器的功用，故安全注射器未使用前，须防止推杆因外力影响例如：组装、包装、运输过程碰撞或人为的疏失而令推杆往前运动并与针座组产生卡扣，为避免误触而造成注射器功能破坏，有鉴于此，遂有一发明在推杆末端设计一限位片的结构设计，请参阅图1及图2所示，该中空筒体1内部设一推杆2，筒体1头端设一针座组7，该针座组7设有一嵌扣部9，且该推杆2前端设一推杆头6，推杆头6预定位置设有一扣组部8，该推杆头6恰可活动穿伸该针座组7的特定点后，该推杆头6的扣组部8是卡扣于该针座组7的嵌扣部9，而该筒体1末端设有两横片形态的末抵端5，且该推杆2末端设一推端4，令该推杆2末端侧缘3相对该末端抵端及该推杆2处设一限位片C，其中该限位片C设有与该推杆2互呈接点状的侧连结部C1，且该限位片C设有与该推端4互呈接点状的底连结部C2，且该限位片C顶端对应该筒体1的该末抵端5设有一上抵端C3，该安全型注射器藉由该限位片C上下限位于该推杆2的 推端4与该筒体1的末抵端5位置，令该推杆头6的扣组部8在未达卡扣于该针座组7的嵌扣部9位置之前产生限位，故当注射器欲进行注射功能前，须先扯断该限位片C的各侧连结部C1及底连结部C2后方可使用；然而该限位片C的各该接点形态的侧连结部C1与底连结部C2皆是与该推杆2注塑而成，故限位片C的各该侧连结部C1与底连结部C2会有厚薄不均的现象，若侧连结部C1与底连结部C2的接点太薄则结合力小，太厚则不易扯断，故现有技术的安全型注射器的限位片C结构存有不稳定的因素。
发明内容
本发明的目的在于解决现有中的问题，提供一种保护装置及安全型注射器；其可防止因外力因素而令推杆前进时造成注射器破坏；以及安全型注射器完成注射后，可将保护装置塞入该筒体前端开口位置，令筒体内部空间与外界达到隔离，及使用完成的可换针注射件、残留药液封闭于筒体内达到防止外泄外，亦可防止医护人员及医疗废弃物处理人员扎针事故发生的用途。
为达成上述目的，本发明采用如下技术方案，
一种保护装置，包含一底座，该底座设一结合部；该底座的底部设一开放状锥形槽，且该锥形槽内底端面中央凸伸一限挡柱；另该保护装置外环周面设一中间环部，且该保护装置相异于锥形槽一端设一驱转端。
优选地，该保护装置的该中间环部与该结合部之间设有一导引部，且该中间环部与该驱转端之间设有一嵌扣段，该中间环部与该嵌扣段的相交位置设一阶状环挡缘；另该保护装置的该驱转端呈凸缘状，且该驱转端内设有一非圆形槽。
优选地，该保护装置的该结合部可为外螺纹形态；另该保护装置的该结 合部可为两侧分别设有螺锁蝶片形态；又该结合部可为平滑表面形态。
安全型注射器，包含一中空筒体、一设置于该筒体前端的可换针式针座组、以及一可位移于该筒体内部的推杆；其中该针座组内部设有一贯孔，该推杆对应该贯孔一端设有一推杆头，该推杆头恰可穿入位移于该针座组的该贯孔中；另该针座组的贯孔内预定区段环设有一嵌扣部，该推杆的推杆头预定位置对应该嵌扣部设有一扣组部，该推杆的该扣组部可藉由推杆头位移前进于该针座组的贯孔并达到一预设深度后，而使扣组部对应扣合于该嵌扣部后该推杆可相对该针座组启用内缩功能进入筒体内部；另该针座组相异于嵌扣部一端设一可换针组接部；以及所述保护装置，该保护装置的结合部为一可对应活动组装的结合部，该结合部对应该安全型注射器的该针座组的可换针组接部设置；当该保护装置的结合部组装于该针座组的可换针组接部时，该保护装置的限挡柱恰抵顶限位于该推杆的该推杆头末端处，抵顶时恰使该推杆的该扣组部限位在未到达该针座组的嵌扣部的相卡扣位置。
优选地，其中该保护装置的该结合部可为外螺纹形态，且该针座组的该可换针组接部为相匹配螺组的内螺纹形态；又该保护装置的该结合部可为可为两侧分别设有螺锁蝶片形态，且该针座组的该可换针组接部为提供前述结合部相匹配螺组的内螺纹形态；或该结合部为平滑表面形态，且该针座组一端凸伸有一锥状柱，利用该保护装置的锥形槽以斜锥迫抵方式紧固于该锥状柱。
优选地，该所述推杆可相对该针座组启用内缩功能的技术手段，是藉由该针座组包含有一限转件及一环转件，该限转件及该环转件分别设有相对枢组的一枢接部及一枢转部，其中该环转件外缘预定位置设有至少一L槽，该L槽包含有一开放端及一封闭端，该封闭端另侧设一挡止端，该筒体内壁对 应该L槽设有至少一挡块，当该环转件的L槽藉由环转至封闭端时可相对该筒体的挡块作定位模式，当该环转件的L槽藉由环转至开放端时可相对该筒体的挡块作非定位模式；该限转件外缘预定位置设有至少一呈U状限转座，该筒体内壁对应该限转座设有至少一限转片，当该限转件的限转座嵌入该筒体的限转片时该限转件可相对该筒体作限制环转模式；该环转件内部呈中空状，并于内周面预定区段位置设有一嵌扣部，该嵌扣部相邻区段设有一受转部，该受转部设有复数导斜面；该限转件内部设有贯孔，该贯孔内预定区段设有一多边形断面的非圆形区段；该推杆的推杆头由上而下依续设有一与该限转件的非圆形区段相匹配的非圆形段、一对应环转件的嵌扣部的扣组部、及一与环转件的受转部相匹配的拨转部，其中该拨转部设有复数拨抵端及分设于各该拨抵端的让槽以相互匹配该环转件的受转部的复数导斜面；当该推杆的该推杆头进入该限转件的贯孔时，该推杆的非圆形段藉由该限转件的非圆形区段产生限制转动功能，以使推杆的拨转部呈直线前进状态来拨转环转件的该受转部，拨转完成时该推杆的扣组部同步扣合于该环转件的嵌扣部，且同时该环转件因拨转一角度而使L槽环转至开放端，俾使该环转件未受到筒体的挡块产生定位，俾使推杆可相对该针座组启用内缩功能。
优选地，该保护装置的用途是使用于仍处于包装状态下且未注射的安全型注射器时，该保护装置的结合部是组装于针座组的可换针组接部，令该保护装置的限挡柱恰抵顶限位于该推杆的该推杆头末端处，抵顶时恰使该推杆的该扣组部限位在未到达该针座组的嵌扣部的相卡扣位置。
优选地，该保护装置是使用于安全型注射器完成注射后，该推杆启用内缩功能使针座组拉进筒体内部，并将保护装置塞入该筒体前端开口位置，该保护装置的中间环部恰可紧固于该筒体前端的内环周壁面。
本发明欲解决的问题点，是针对现有技术安全型注射器的限位片各该接点形态的侧连结部与底连结部皆是与该推杆注塑而成，故限位片的各该侧连结部与底连结部会有厚薄不均的现象，若侧连结部与底连结部的接点太薄则结合力小，太厚则不易扯断，故针对现有技术的安全型注射器的限位片结构存有不稳定的因素问题点加以改良突破。
本发明提供的技术方案藉由该保护装置的结合部是组装于针座组的可换针组接部，令该保护装置的限挡柱恰抵顶限位于该推杆的该推杆头末端处，抵顶时恰使该推杆的该扣组部限位在未到达该针座组的嵌扣部的相卡扣位置，以防止因外力因素而令推杆前进时令其扣组部与针座组的嵌扣部产生卡扣而造成注射器破坏的用途；以及安全型注射器完成注射后，可将保护装置塞入该筒体前端开口位置，令筒体内部空间与外界达到隔离，及使用完成的可换针注射件、残留药液封闭于筒体内达到防止外泄外，亦可防止医护人员及医疗废弃物处理人员扎针事故发生的用途。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本发明的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是现有技术安全型注射器的限位片结构剖视图。
图2是现有技术安全型注射器的限位片结构与该注射器分离的剖视图。
图3是本发明安全型注射器的保护装置的立体分解图。
图4是本发明安全型注射器的保护装置立体图。
图5是本发明安全型注射器的保护装置另一角度立体图。
图6是本发明安全型注射器的保护装置剖视图。
图7是本发明安全型注射器与保护装置相对结合状态剖视图。
图8是本发明安全型注射器与保护装置相对分离状态剖视图。
图9是本发明安全型注射器组设可换针注射器的剖视图。
图10是本发明安全型注射器藉由可换针注射器作吸取药液的剖视图。
图11是本发明安全型注射器的推杆前推后推杆头卡扣于针座组的剖视图。
图12是图11的放大示意图a，其是显示推杆头卡扣于针座组的剖视图。
图13是本发明安全型注射器注射后将推杆内缩使针座组及注射件拉进筒体内部后，令该推杆的折断部施力折断的剖视图。
图14是本发明安全型注射器注射后呈内缩状态下，令筒体头端欲塞入保护装置的动作剖视图。
图15是本发明安全型注射器注射后呈内缩状态下，令筒体头端已塞入保护装置的动作剖视图。
图16是图15的放大示意图b，其是显示该保护装置的筒体头端的相对位置。
图17是图16的结构变化实施例图
图18是本发明安全型注射器未具有可换针组接部的结构变化又一实施例，利用该保护装置的锥形槽以斜锥迫抵方式紧固于该中空锥柱，令该保护装置的限挡柱恰抵顶限位于该推杆的该推杆头末端处的剖视图。
图19是本发明的保护装置的再一实施例立体图，其是显示结合部可为螺锁蝶片形态。
图20是本发明的保护装置的结合部的结构变化的再一实施例剖视图。
【符号说明】
1筒体    2推杆
3侧缘                   4推端
5末抵端                 6推杆头
7针座组                 8扣组部
9嵌扣部                 C限位片
C1侧连结部              C2底连结部
C3上抵端
A安全型注射器           B针座组
B1中空锥柱              B2推杆头
10筒体                  11挡块
12容室                  13限转片
14末抵端                15组孔
20推杆                  201环挡缘
21幅肋片                22折断部
23胶塞                  24拨转部
25拨抵端                26让槽
27扣组部                28非圆形段
29推杆头                30环转件
31 L槽                  32封闭端
33挡止端                34开放端
35枢转部                36密封圈
37嵌扣部                38受转部
39导斜面                40限转件
41枢接部                42限转座
43可换针组接部          44密封垫圈
45非圆形区段            46贯孔
47锥状柱                50可换针注射件
51螺锁蝶片              52注射针
60轨道压板              61轨道槽
62组部                  63环挡缘
70保护装置               71驱转端
72切削面                 73非圆形槽
74嵌扣段                 75中间环部
751导引部                76环挡缘
77底座                   78结合部
79锥形槽                 791限挡柱
78 a 结合部
具体实施方式
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚、明白，以下结合附图和实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
本发明的权利要求书、说明书及上述附图中，如使用术语“包括”、“具有”以及它们的变形，意图在于“包含但不限于”。
请参阅图3-16所示，是本发明安全型注射器的保护装置的较佳实施例，惟此等实施例仅供说明的用，在专利申请上并不受此结构的限制，其是包括：
一安全型注射器A，包含一中空筒体10、一设置于该筒体10的容室12前端的可换针式针座组B、以及一可位移于该筒体10内部的推杆20；其中该针座组B内部设有一贯孔46，该推杆20对应该贯孔46一端设有一推杆头29，该推杆头29恰可穿入位移于该针座组B的该贯孔46中；另该针座组B的贯孔46内预定区段环设有一嵌扣部37，该推杆20的推杆头29预定位置对应该嵌扣部37设有一扣组部27，该推杆20的该扣组部27可藉由推杆头29位移前进于该针座组B的贯孔46并达到一预设深度后，而使扣组部27对应扣合于该嵌扣部37，该推杆20可相对该针座组B启用内缩功能进入筒体10内部；另该针座组B相异于嵌扣部37一端设一可换针组接部43；以及
一保护装置70，包含一底座77，该底座77对应该安全型注射器A的该针座组B的可换针组接部43设一可对应活动组装的结合部78；该底座77的底部设一开放状锥形槽79，且该锥形槽79内底端面中央凸伸一限挡柱791；另该保护装置70外环周面设一中间环部75，且该保护装置70相异于锥形槽79一端设一驱转端71；
当该保护装置70的结合部78组装于该针座组B的可换针组接部43时，该保护装置70的限挡柱791恰抵顶限位于该推杆20的该推杆头29末端处，抵顶时恰使该推杆20的该扣组部27限位在未到达该针座组B的嵌扣部37的相卡扣位置。
继而，该所述推杆20可相对该针座组B启用内缩功能的技术手段，是藉由该针座组B包含有一限转件40及一环转件30，该限转件40及该环转件30分别设有相对枢组的一枢接部41及一枢转部35，且该限转件40与该环转件30之间设有一密封垫圈44，其中该环转件30外缘预定位置设有一密封圈36及至少一L槽31，该L槽31包含有一开放端34及一封闭端32，该封闭端32另侧设一挡止端33，该筒体10内壁对应该L槽31设有至少一挡块11，当该环转件30的L槽31藉由环转至封闭端32时可相对该筒体10的挡块11作定位模式，反的当该环转件30的L槽31环转至开放端34时可相对该筒体10的挡块11作非定位模式；该限转件40外缘预定位置设有至少一呈U状限转座42，该筒体10内径对应该限转座42设有至少一限转片13，当该限转件40的限转座42嵌入该筒体10的限转片13时该限转件40可相对该筒体10作限制环转模式；该环转件30内部呈中空状，并于内周面预定区段位置设有一嵌扣部37，该嵌扣部37相邻区段设有一受转部38。该环转件30上的该嵌扣部37和该受转部38可参见现有技术2013.12.25公开的CN102652849安全 注射器的针座组件自转回缩结构，故不详加赘述。本实施例中，该受转部38设有复数导斜面39；该限转件40内部设有贯孔46，该贯孔46内预定区段设有一多边形断面的非圆形区段45；该推杆20的推杆头29由上而下依续设有一与该限转件40的非圆形区段45相匹配的非圆形段28、一对应环转件30的嵌扣部37的扣组部27、及一与环转件30的受转部38相匹配的拨转部24，其中该拨转部24设有复数拨抵端25及分设于各该拨抵端25的让槽26以相互匹配该环转件30的受转部38的复数导斜面39，且该推杆20的杆段为十字型幅肋片21，该推杆20近该拨转部24的邻侧设一胶塞23，该胶塞23一侧设有一环挡缘201及一折断部22；另该筒体10末端处设有一两横片形态的末抵端14，各该末抵端14预定位置设有一组孔15，各该末抵端14的各该组孔15分别可供两对称轨道压板60的组部62扣合，而使两轨道压板60扣合定位于该末抵端14位置，各该轨道压板60内缘凸设有环挡缘63并伸入该筒体10内环周壁面，且各该轨道压板60对应该推杆20的该幅肋片21设有导轨式形态的轨道槽61，令该推杆20在前推时藉由该轨道槽61可导引该幅肋片21呈现直线位移运动；当该推杆20的该推杆头29进入该限转件40的贯孔46时，该推杆20的非圆形段28藉由该限转件40的非圆形区段45产生限制转动功能，以及推杆20的幅肋片21藉由导轨式形态的轨道槽61作导引直线运动，以使推杆20的拨转部24呈直线前进状态来拨转环转件30的该受转部38，拨转完成时该推杆20的扣组部27同步扣合于该环转件30的嵌扣部37，且同时该环转件30因拨转一角度而使L槽31环转至开放端34，使该环转件30未受到筒体10的挡块11产生定位功能，而能使推杆20可相对该针座组B启用内缩功能，内缩后该推杆20可藉由弯折该折断部22令推杆20折断，防止该注射器续行使用。
较佳地，该保护装置70的该中间环部75与该结合部78之间设有一导引部751，且该中间环部75与该驱转端71之间设有一嵌扣段74，该中间环部75与该嵌扣段74的相交位置设一阶状环挡缘76。
较佳地，该保护装置70的该驱转端71呈凸缘状，外缘两端并设有两切削面72，且该驱转端71内设有一非圆形槽73，以利于使用者手动驱转该驱转端71，或使用多角形扳手工具作驱转该非圆形槽73。
较佳地，该保护装置70的该结合部78可为外螺纹形态，且该针座组B的该可换针组接部43为相匹配的内螺纹形态，其中该安全型注射器A欲作注射使用时，是令该保护装置70的结合部78螺出该可换针组接部43后，更换一可换针注射件50所具有的一螺锁蝶片51来螺入该针座组B的该可换针组接部43安装定位，所述该螺锁蝶片51与该针座组B的该可换针组接部43为相匹配螺组形态；或该结合部78为平滑表面形态，且该针座组B一端凸伸有一锥状柱47，利用该保护装置70的锥形槽79以斜锥迫抵方式紧固于该锥状柱47。
本发明更包含一种安全型注射器A的保护装置70的用途，如图7所示，其中该保护装置70的用途是使用于仍处于包装状态下且未注射的安全型注射器A时，该保护装置70的结合部78是组装于针座组B的可换针组接部43，令该保护装置70的限挡柱791恰抵顶限位于该推杆20的该推杆头29末端处，抵顶时恰使该推杆20的该扣组部27限位在未到达该针座组B的嵌扣部37的相卡扣位置，以防止因外力因素而令推杆20前进时令其扣组部27与针座组B的嵌扣部37产生卡扣而造成注射器破坏的用途；再者当注射器欲使用时，需令保护装置70的结合部78自该针座组B的可换针组接部43卸出，卸出方式于本实例是两者间分别设有相互匹配的外螺纹及内螺纹作螺转分离，再令 一具有注射针52的可换针注射件50的螺锁蝶片51螺入该针座组B的可换针组接部43使用，使用过程先药液抽取后进行注射，再进行回缩针座组B及可换针注射件50进入筒体10内部后折断该推杆20。如图9至图13所示，其是现有技术2013.12.25公开的CN102652849安全注射器的针座组件自转回缩结构的注射器注射及内缩功能，故不详加赘述。
承上述，如图14至图16所示，该保护装置70的另一用途是使用于安全型注射器A完成注射后，该推杆20启用内缩功能使针座组B及可换针注射件50回缩拉进筒体10内部，并将保护装置70塞入该筒体10前端开口位置，塞入时较佳实施方式可为先令该保护装置70置于桌面，再把筒体10前端朝下压入该保护装置70，压入时该筒体10可顺着该导引部751令筒体10的限转片13嵌入该保护装置70嵌扣段74卡合定位，令筒体10内部空间与外界达到隔离，并使该使用完成的可换针注射件50、残留药液封闭于筒体10内达到防止外泄外，亦可防止医护人员及医疗废弃物处理人员扎针事故发生的用途。
承上述的另一变化实施例，可为令安全型注射器A的针座组B及可换针注射件50先回缩拉进筒体10内部后，再使该保护装置70塞入该筒体10前端开口位置，最后再折断该推杆20。
如图17所示，其是图16结构变化的另一实施例，当使用于安全型注射器A完成注射后欲将保护装置70塞入该筒体10前端开口位置时，且该筒体10一端内部环周壁面在未设有限转片13的实施例下，仍能藉由该保护装置70的中间环部75外径紧固于该筒体10前端的内径，使二者因过盈而卡合在一起，令筒体10内部空间与外界达到隔离的效果。
如图18所示，其是本发明的又一实施例，当未注射的安全型注射器A 欲使该保护装置70组装于一端凸伸有一中空锥柱B1的针座组B时，且该针座组B在未具有可换针组接部43的实施例下，利用该保护装置70的锥形槽79以斜锥迫抵方式紧固于该中空锥柱B1，来使该限挡柱791抵顶该推杆头B2相对端部位置作限位。
如图19～20所示，其是本发明的再一实施例，由图19的立体图所示，该保护装置70的该结合部78a可为两侧分别设有螺锁蝶片形态，由图20的剖视图所示，该针座组B的该可换针组接部43为相匹配螺组的内螺纹形态，令该螺锁蝶片形态的该结合部78a可螺入组装于该内螺纹形态的可换针组接部43。
上述说明示出并描述了本发明的优选实施例，如前所述，应当理解本发明并非局限于本文所披露的形式，不应看作是对其他实施例的排除，而可用于各种其他组合、修改和环境，并能够在本文所述发明构想范围内，通过上述教导或相关领域的技术或知识进行改动。而本领域人员所进行的改动和变化不脱离本发明的精神和范围，则都应在本发明所附权利要求的保护范围内。

Claims (9)

  1. 一种保护装置，其特征在于，包含一底座，该底座设一结合部；该底座的底部设一开放状锥形槽，且该锥形槽内底端面中央凸伸一限挡柱；另该保护装置外环周面设一中间环部，且该保护装置相异于锥形槽一端设一驱转端。
  2. 如权利要求1所述的一种保护装置，其特征在于，该保护装置的该中间环部与该结合部之间设有一导引部，且该中间环部与该驱转端之间设有一嵌扣段，该中间环部与该嵌扣段的相交位置设一阶状环挡缘。
  3. 如权利要求1所述的一种保护装置，其特征在于，该保护装置的该驱转端呈凸缘状，且该驱转端内设有一非圆形槽。
  4. 如权利要求1所述的一种保护装置，其特征在于，该保护装置的该结合部可为外螺纹形态；另该保护装置的该结合部可为两侧分别设有螺锁蝶片形态；又该结合部可为平滑表面形态。
  5. 安全型注射器，其特征在于，包含一中空筒体、一设置于该筒体前端的可换针式针座组、以及一可位移于该筒体内部的推杆；其中该针座组内部设有一贯孔，该推杆对应该贯孔一端设有一推杆头，该推杆头恰可穿入位移于该针座组的该贯孔中；另该针座组的贯孔内预定区段环设有一嵌扣部，该推杆的推杆头预定位置对应该嵌扣部设有一扣组部，该推杆的该扣组部可藉由推杆头位移前进于该针座组的贯孔并达到一预设深度后，而使扣组部对应扣合于该嵌扣部后该推杆可相对该针座组启用内缩功能进入筒体内部；另该针座组相异于嵌扣部一端设一可换针组接部；以及
    如权利要求1-4任一所述的保护装置，该保护装置的结合部为一可对应活动组装的结合部，该结合部对应该安全型注射器的该针座组的可换针组接部设置；
    当该保护装置的结合部组装于该针座组的可换针组接部时，该保护装置的限挡柱恰抵顶限位于该推杆的该推杆头末端处，抵顶时恰使该推杆的该扣组部限位在未到达该针座组的嵌扣部的相卡扣位置。
  6. 如权利要求5所述的安全型注射器，其特征在于：其中该保护装置的该结合部可为外螺纹形态，且该针座组的该可换针组接部为相匹配螺组的内螺纹形态；又该保护装置的该结合部可为可为两侧分别设有螺锁蝶片形态，且该针座组的该可换针组接部为提供前述结合部相匹配螺组的内螺纹形态；或该结合部为平滑表面形态，且该针座组一端凸伸有一锥状柱，利用该保护装置的锥形槽以斜锥迫抵方式紧固于该锥状柱。
  7. 如权利要求5所述的安全型注射器，其特征在于：该所述推杆可相对该针座组启用内缩功能的技术手段，是藉由该针座组包含有一限转件及一环转件，该限转件及该环转件分别设有相对枢组的一枢接部及一枢转部，其中该环转件外缘预定位置设有至少一L槽，该L槽包含有一开放端及一封闭端，该封闭端另侧设一挡止端，该筒体内壁对应该L槽设有至少一挡块，当该环转件的L槽藉由环转至封闭端时可相对该筒体的挡块作定位模式，当该环转件的L槽藉由环转至开放端时可相对该筒体的挡块作非定位模式；该限转件外缘预定位置设有至少一呈U状限转座，该筒体内壁对应该限转座设有至少一限转片，当该限转件的限转座嵌入该筒体的限转片时该限转件可相对该筒体作限制环转模式；该环转件内部呈中空状，并于内周面预定区段位置设有一嵌扣部，该嵌扣部相邻区段设有一受转部，该受转部设有复数导斜面；该限转件内部设有贯孔，该贯孔内预定区段设有一多边形断面的非圆形区段；该推杆的推杆头由上而下依续设有一与该限转件的非圆形区段相匹配的非圆形段、一对应环转件的嵌扣部的扣组部、及一 与环转件的受转部相匹配的拨转部，其中该拨转部设有复数拨抵端及分设于各该拨抵端的让槽以相互匹配该环转件的受转部的复数导斜面；当该推杆的该推杆头进入该限转件的贯孔时，该推杆的非圆形段藉由该限转件的非圆形区段产生限制转动功能，以使推杆的拨转部呈直线前进状态来拨转环转件的该受转部，拨转完成时该推杆的扣组部同步扣合于该环转件的嵌扣部，且同时该环转件因拨转一角度而使L槽环转至开放端，俾使该环转件未受到筒体的挡块产生定位，俾使推杆可相对该针座组启用内缩功能。
  8. 如权利要求5所述的安全型注射器，其特征在于：该保护装置的用途是使用于仍处于包装状态下且未注射的安全型注射器时，该保护装置的结合部是组装于针座组的可换针组接部，令该保护装置的限挡柱恰抵顶限位于该推杆的该推杆头末端处，抵顶时恰使该推杆的该扣组部限位在未到达该针座组的嵌扣部的相卡扣位置。
  9. 如权利要求5所述的安全型注射器，其特征在于：该保护装置是使用于安全型注射器完成注射后，该推杆启用内缩功能使针座组拉进筒体内部，并将保护装置塞入该筒体前端开口位置，该保护装置的中间环部恰可紧固于该筒体前端的内环周壁面。
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US6190364B1 (en) * 1994-12-12 2001-02-20 Becton, Dickinson And Company Syringe tip cap
US6632199B1 (en) * 2000-05-23 2003-10-14 Becton Dickinson And Company Syringe assembly including plastic tip cap
CN102652849A (zh) * 2011-03-02 2012-09-05 张淑茗 安全注射器的针座组件自转回缩结构
CN202892570U (zh) * 2012-02-29 2013-04-24 王祖扬 一种针头回拉式可换针安全自毁注射器
CN108498901A (zh) * 2018-04-27 2018-09-07 张淑茗 一种保护装置及安全型注射器

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