CN202822342U

CN202822342U - Safe injector

Info

Publication number: CN202822342U
Application number: CN 201220491063
Authority: CN
Inventors: 吴渭水
Original assignee: SONGYI INTERNATIONAL ENTERPRISE CO Ltd
Current assignee: SONGYI INTERNATIONAL ENTERPRISE CO Ltd
Priority date: 2012-09-24
Filing date: 2012-09-24
Publication date: 2013-03-27
Anticipated expiration: 2022-09-24

Abstract

Provided is a safe injector. The safe injector is provided with a medicine storage space, a positioning thread is arranged inside the top end of an injecting tube in a ringlike mode, a broken edge is arranged inside the bottom end of the injecting tube in a ringlike mode, and a blocking and check part which can be used for a finger to press against and push protrudes outside the bottom end of the injecting tube in the radial direction. A push rod can slide up and down inside the medicine storage space of the injecting tube in the axial direction. A pushing part is arranged at the top end of the push rod, and the bottom end of the push rod is provided with a pushing slice and is connected with a plurality of rib strips. A needle seat comprises a coating part which is provided with a passageway, wherein a lower protrusion of the coating part is provided with a bulge loop to provide a leakage-proof effect, and a concave circular groove and an outer spiral segment are arranged tightly adjacent to the lower end of the bulge loop. The outer spiral segment can be tightly combined with the positioning thread of the injecting tube in a rotating mode. Thus, the safe injector enables a needle head to be contained inside the medicine storage space of the injecting tube, and therefore the safety of the usage of medical equipment is ensured.

Description

Safety injector

Technical field

The syringe needle that this utility model relates to after a kind of can the use reclaims the safety injector that is placed in the injection tube.

Background technology

" pinprick " is the modal employment injuries of medical personnel located, the Potential danger of pinprick comes from the pathogen infection of blood or body fluid, estimate according to medical institutions, annual pinprick event is at least above 30,000, be equal to 4 the pinprick events that on average per hour just occur, wherein, by tool infectious disease such as hepatitis B (Hepatic B), C type hepatitis (Hepatic C) and acquired immunity lack the used syringe needle of patient of virus (HIV) and stab rate, be respectively 14%, 15% and 0.7%, so the high rate of stabbing also causes the healthcare givers to use fear on the entry needle.

Though the inventor has had the patent of multinomial relevant safety injector, but still urgently think improvement for the simplifying of structure of safety injector and the frictional force and the packing effect that increase combination between each member, adhere to excelsior spirit, continue again to concentrate on studies.

The utility model content

The purpose of this utility model namely is to provide a kind of recoverable syringe needle and is built in the injection tube, and after finishing using, the syringe of the rotatable detachable needle in the injection tube can be planted or be recovered in to needle cover; The syringe of described rotatable detachable needle can utilize the cervical region of the push rod of small diameter after use, the operation that makes the push rod that exposes can fracture and separate.

Can reach the safety injector of above-mentioned utility model purpose, comprise:

One injection tube has a drug storage space, and described injection tube top inner loop is provided with a location screw thread, and described injection tube bottom inner loop is provided with a break-off edges, and protrudes one for pointing the stop section that pushes in described bottom outer radial;

One push rod, can axially slide up and down the drug storage space in described injection tube, described push rod top has a pushing part, this pushing part has extended upward a convex fastening part, around described pushing part lower outer, locate, be interval with again the contraposition part of a plurality of projection shapes, the sheathed collar of described contraposition part, the below of the described collar is provided with a block edge, the diameter of this block edge is greater than the diameter of convex fastening part, described push rod bottom has a push jack, this push jack is connected with the multiple tracks rib, is connected with a cervical region between described rib and the block edge, and the diameter of this cervical region is less than the diameter of this block edge;

One needle stand, comprise: the sleeve through part with a passage, convex with a bulge loop under the described sleeve through part, next-door neighbour's bulge loop lower end is provided with a concave ring groove and an external spiral section, described external spiral section can closely screw with the positioning threads of described injection tube, and is provided with protruding grain in described passage, and the rear termination of the protruding grain in the described passage is established an accommodation space, convex with a plurality of locating pieces in the surface of described accommodation space, for the contraposition part embedding of described push rod.

Described safety injector, wherein, described contraposition part has the guiding face of the locating piece of a relative needle stand.

Described safety injector, wherein, more include a pinhead sleeve, described pinhead sleeve one end is provided with a syringe needle, the described pinhead sleeve other end is provided with a guide lug section, when described guide lug section provides a needle cover more closely to cover, and described pinhead sleeve can correspondence be sheathed on this sleeve through part of described needle stand and locates.

Described safety injector, wherein, after the injection tube injection is complete, described push rod continues forward and multiple convex fastening part correspondence with its push rod is fastened in the top of the protruding grain in the sleeve through part of needle stand, then then counter-rotate described push rod and the described needle stand of interlock is stepped back along the direction of the spiral of positioning threads, make its external thread section break away from positioning threads, make simultaneously the whole internal coiling section that breaks away from described injection tube of described needle stand.

Described safety injector, wherein, the positioning threads of described injection tube front end is the square thread shape.

According to by above structure, make described needle stand by its internal coiling section of described injection tube, can organize on its sleeve through part with the corresponding cover of a pinhead sleeve and locate, then provide on the positioning threads that needle stand communicated injection tube and after screwing the location, the medicinal liquid that is installed in its drug storage space of described injection tube can be entered in the body of wanting the injector via accommodation space, passage and needle injection thereafter.

Description of drawings

Fig. 1 is the perspective exploded view of this utility model one preferred embodiment;

Fig. 2 is the plan cross-section decomposing schematic representation of Fig. 1;

Fig. 3 is that described push rod wears described needle stand by the action schematic diagram of the rear end forward impelling of described injection tube;

Fig. 4 is the schematic perspective view of push rod front end;

Fig. 5 is the axonometric chart of needle stand;

Fig. 6 is the plane graph of needle stand;

Fig. 7 is plane combination and the cross-sectional schematic that described push rod wears described needle stand and passes from its syringe needle of described injection tube;

Fig. 8 for the described pinhead sleeve of socket on the described needle stand that passes in syringe needle perforation place of described Fig. 7 with the winding syringe needle and cover plane combination and the cross-sectional schematic of needle cover;

Fig. 9 is needle stand outward appearance and the action schematic diagram of Fig. 8;

Figure 10 is for counter-rotating described push rod with the described needle stand of the interlock stereoscopic motion schematic diagram that separates with the positioning threads of described injection tube of its external spiral section down;

Figure 11 fractures needle stand and syringe needle to be retained in the injection tube behind the cervical region of described push rod, more described needle cover is oppositely injected the floor map of its syringe needle perforation place of described injection tube;

Figure 12 is the second enforcement figure of the positioning threads of injection tube.

Description of reference numerals: 1-injection tube; 11-drug storage space; The 12-positioning threads; The 13-break-off edges; The 14-stop section; The 2-push rod; The 21-pushing part; The 22-convex fastening part; The 23-contraposition part; The 24-guiding face; The 25-block edge; The 26-collar; The 27-cervical region; The 28-rib; The 29-push jack; The 3-needle stand; The 31-sleeve through part; The 32-passage; The 33-accommodation space; The 34-locating piece; 35-external spiral section; The 36-concave ring groove; The 37-bulge loop; The protruding grain of 38-; The 4-pinhead sleeve; The 41-syringe needle; 42-guide lug section; The 43-needle cover.

The specific embodiment

See also Fig. 1 to shown in Figure 2, a kind of safety injector of this utility model, it includes an injection tube 1, a push rod 2, a needle stand 3, a pinhead sleeve 4 and a needle cover 43 and forms; Wherein

One injection tube 1 has a drug storage space 11, and described injection tube 1 top inner loop is provided with a location screw thread 12, and the bottom inner loop is provided with a break-off edges 13, and protrudes a stop section 14 that can supply finger to push in described bottom outer radial.

Described push rod 2 can axially slide up and down the drug storage space 11 in described injection tube 1, described push rod 2 tops have a pushing part 21, and extend upward the convex fastening part 22 of a small diameter, around described pushing part 21 lower outer, locate again, be interval with the contraposition part 23 of a plurality of projection shapes, and follow a sheathed collar 26, the below that is connected on the described collar 26 is provided with a larger-diameter block edge 25, described push rod 2 bottoms have a push jack 29 and are connected with multiple tracks rib 28 again, and described push jack 29 at least on one side sheet subscript is provided with the relative arrow sign of sensing, be connected between described rib 28 and the block edge 25 and with the cervical region 27 of a small diameter, in addition, described block edge 25 can be retained in its position of cervical region more than 27 effect in the injection tube 1 for the complete rear twisting push rod 2 of injection, in addition, described contraposition part 23 has the guiding face 24 of the locating piece 34 of a relative needle stand 3;

See also Fig. 4 to shown in Figure 6, described needle stand 3 comprises the sleeve through part 31 with a passage 32, described sleeve through part convexes with a bulge loop 37 for 31 times, the effect of leakproof is provided, next-door neighbour's bulge loop 37 lower ends are provided with a concave ring groove 36 and an external spiral section 35, described external spiral section 35 can closely screw with the positioning threads 12 of described injection tube 1, and in described passage 32, be provided with protruding grain 38, and termination is established an accommodation space 33 thereafter, convex with a plurality of locating pieces 34 in the surface of described accommodation space 33, contraposition part 23 for described push rod 2 can embed according to this, then is formed with a spacing space in 34 adjacent of two locating pieces.

Wherein, more include a pinhead sleeve 4, described pinhead sleeve 4 one ends are provided with a syringe needle 41, the other end then is provided with a guide lug section 42, it is more tight when described guide lug section 42 can provide a needle cover 43 to cover, and described pinhead sleeve 4 just is able to correspondence and is sheathed on location on described needle stand 3 these sleeve through part 31, when needle stand 3 by described injection tube 1 its positioning threads 12, can organize location on this sleeve through part 31 with a pinhead sleeve 4 corresponding covers, after then providing needle stand 3 and syringe needle 41 to be communicated on injection tube 1 its positioning threads 12 and screwing the location, can make described injection tube 1 its drug storage space 11 interior medicinal liquids that are installed in can be via accommodation space 33 thereafter, passage 32 and syringe needle 41 injections enter in the body of wanting the injector.

Described needle cover 43 is one to be conical body, can cover the pinhead sleeve 4 that is piercing in described injection tube 1, has the danger of scathing body to produce to avoid syringe needle 41 directly to expose.

See also Fig. 3 and Fig. 7 to shown in Figure 8, according to by above-described a kind of safety injector, when using the safety injector of utility model, at first described needle stand 3 is placed in the drug storage space 11 of described injection tube 1, described push rod 2 is then pushed by the rear of needle stand 3, and winding is finished in the spacing space of 34 of adjacent two locating pieces in the inside that makes its contraposition part 23 correspondences be embedded in needle stand 3, continue to promote described push rod 2 and drive described needle stand 3 forward, when described needle stand 3 its sleeve through part 31 want to be stretched through described injection tube 1 its positioning threads 12, described needle stand 3 its external spiral sections 35 are because being threaded with described injection tube 1 its positioning threads 12, make the needle stand 3 can be against rotation direction forward, make bulge loop 37 on the described needle stand 3 just be held in the internal face of described injection tube 1 its positioning threads 12, and the internal face of injection tube 1 in the collar 26 packings on the described push rod 2, and guarantees that its drug storage space 11 is complete sealing state; Then, pinhead sleeve 4 covers that cover needle cover 43 are organized when described needle stand 3 its sleeve through part 31, can be made pinhead sleeve 4 fit in sleeve through part 31 with the inclined-plane along needle stand 3 rotation direction sleeve through part 31.

Action when the user wish extracts medicinal liquid is identical with existing product, user is taken down described syringe needle 41 lids and syringe needle 41 is inserted in the medicine bottle (scheming not shown), directly described push rod 2 is retracted backward and the medicinal liquid suction can be entered in drug storage space 11, because by the structure of described external spiral section 35 and positioning threads 12, can firmly organizing to establish, described needle stand 3 is positioned on the described injection tube 1; And for example shown in Figure 9, and after injection is complete, make described push rod 2 continue forward and multiple convex fastening part 22 correspondences with its push rod 2 are fastened in protruding grain 38 its tops in needle stand 3 sleeve through part 31, as shown in figure 10, then then counter-rotate described push rod 2 and the described needle stand 3 of interlock is stepped back along the direction of the spiral of positioning threads 12, make its external spiral section 35 break away from positioning threads 12, after making simultaneously the positioning threads 12 of the described injection tube 1 of described needle stand 3 whole disengagings, make needle stand 3 hide in the drug storage space 11 of described injection tube 1 with syringe needle 41, the cervical region 27 for the treatment of described push rod 2 retreats to 11 its break-off edges 13 places, described drug storage space, about the twisting described push rod 2 its cervical region 27 is fractureed, as shown in figure 11, and its syringe needle 41 can be retained in the injection tube 1, again described needle cover 43 is oppositely inserted in the positioning threads 12, lose again in the syringe retracting device and regain destruction.

As shown in figure 12, implement figure for second of the positioning threads 12 of injection tube 1, the positioning threads 12 of described injection tube 1 front end can be the square thread shape, makes its joint more tight.

Safety injector provided by the utility model with aforementioned case and other prior aries quoted as proof mutually relatively the time, has more following advantage:

1. this utility model promotes the practicality of safety injector, utilize convex fastening part 22 correspondences of push rod 2 to be fastened in the top of the protruding grain 38 in needle stand 3 sleeve through part 31, fully medicinal liquid is pushed out drug storage space 11, injection tube 1 interior medicinal liquid is injected fully entered human body, and can reduce the pollution problem of medicinal liquid.

2. this utility model can be with in the described drug storage of the syringe needle 41 incomes space 11, the danger of avoiding using syringe needle 41 later to stab human body occurs, and use injection tube 1, push rod 2, needle stand 3 and syringe needle 41 later all can't reclaim to re-use, guarantee the safety that medical device uses.

3. 1 of described needle stand 3 and described injection tube are by the be threaded form of winding of the inside and outside spiral section 35 that is the square thread shape, not only engage more tight, and making injection tube 1 comparatively easy with needle stand 3 withdrawing pattern when making, mortality is less, can reduce manufacturing cost.

Above-listed detailed description is specifying for a possible embodiments of the present utility model, yet described embodiment limits claim of the present utility model, allly do not break away from the equivalence that this utility model skill spirit does and implement or change, all should be contained in the claim of the present utility model.

In sum, this utility model not only really belongs to innovation on the kenel of space, and can have article now and promote above-mentioned multinomial effect, should fully meet novelty and creationary legal utility model patent important document, file an application in the whence in accordance with the law, earnestly ask your office and check and approve this part utility application, to encourage creation, to feeling moral just.

Claims

1. a safety injector is characterized in that, comprising:

2. safety injector as claimed in claim 1 is characterized in that, described contraposition part has the guiding face of the locating piece of a relative needle stand.

3. safety injector as claimed in claim 1, it is characterized in that, more include a pinhead sleeve, described pinhead sleeve one end is provided with a syringe needle, the described pinhead sleeve other end is provided with a guide lug section, when described guide lug section provides a needle cover more closely to cover, and described pinhead sleeve can correspondence be sheathed on this sleeve through part of described needle stand and locates.

4. safety injector as claimed in claim 1 is characterized in that, the convex fastening part of this push rod can corresponding be fastened in protruding the interior top of sleeve through part of needle stand.

5. safety injector as claimed in claim 1 is characterized in that, the positioning threads of described injection tube front end is the square thread shape.