CN102614562A

CN102614562A - Contracting rod syringe

Info

Publication number: CN102614562A
Application number: CN2011100278297A
Authority: CN
Inventors: 颜健民
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-26
Filing date: 2011-01-26
Publication date: 2012-08-01

Abstract

With references of a picture 2 and a picture 3, when a contracting rod syringe is pushed to the bottom, the other end of a stabbing rod 4 is backed up to be inserted into an inner cavity of a needle base 3. A top spring ring 14 presses spring top teeth 15 to contract toward the axle-center direction simultaneously, the spring energy of a spring 6 is released, and a press handle 21 is pushed to a tail hole 10 to be hooked and stumbled by tail hole teeth 11. Simultaneously, a core rod 2 is contracted backward to drive the needle base 3 and a needle tube 9 to be released from an inner cavity of an inner conical head 20 of an outer sleeve 1 and to be pushed into the outer sleeve 1. If the core rod 2 is pulled again, a retaining ring 21 is contacted with blocking teeth 17 so that the retaining ring 21 cannot be released, the contracting rod syringe cannot be used again, and the needle tube is protected at the first time after being used.

Description

The bar syringe contracts

Technical field:

The present invention relates to injector for medical purpose, particularly injection is used to complete the later bar syringe that contracts.

Background technology:

Various types injector for medical purpose commonly used at present reaches the effect of suction through push-and-pull.But after accomplishing the expection instructions for use, discarded cross-contamination and the reusable possibility of existing later; The trouble that also comprises disposal; Especially if receive unexpected acupuncture, obviously there is infectious possibility in the needle tubing that contacts with blood of human body.Though the syringe of the needle tubing pumpback of safety has been arranged at present; But structure is unreasonable, and the material behavior and manufacturing characteristic, the requirement that has strengthened the plastic manufacturing process dimensional accuracy of plastics do not considered in many designs; Increased the trouble of making, assembling can not reach complete mechanicalization; Particularly the small dimension syringe can not be realized automatic retraction.Therefore, this patent proposes after injection is accomplished to be retracted into the design of overcoat to needle tubing automatically through shortening core bar, reaches injection back control needle tubing, avoids the purpose of accidental needle sticks, also provides convenience for the nursery work of medical personnel's liquid medicine injection.Considered the convenience of making at design aspect, the assembling of particularly favourable automatization.

Summary of the invention:

The objective of the invention is to be provided at the injector for medical purpose that can be retracted into needle tubing overcoat after injection is accomplished automatically, the very first time is controlled needle tubing after accomplishing from injection, reduces nursing labor intensity simultaneously.And it is rational in infrastructure, makes easily, and cost is also low.

The present technique solution is: the built-in needle stand of overcoat cervical region; Core bar one end is equipped with piston, and the heart is provided with blind hole installation agnail bar therein; , core bar is connected with the push rod medicated cap after putting on spring through perforation, spring being installed in the push rod medicated cap of core bar by hands and perforated edge, and the bullet apical tooth through core bar after overcompression is fixed; After injection is accomplished, oppress the bullet apical tooth to discharge resilience energy through the apical ring of overcoat, shift core bar onto push rod medicated cap uropore place, obtain restriction through the uropore tooth, reached the purpose that shortens core bar; The needle stand that the core bar handle of agnail bar is installed simultaneously connects needle tubing and retracts together in the overcoat, reaches the needle tubing purpose of retraction automatically.

The bar syringe that contracts is made up of overcoat, core bar, needle stand, needle tubing, sheath, piston, spring.Manufactured materials all adopts the employed material of present syringe.

The built-in installation needle stand of overcoat cervical region of overcoat part, needle stand and overcoat cervical region reach close-fitting through the size interference fit.

Core bar one end is equipped with piston, prevents the medicinal liquid seepage; Central authorities at core bar one end are provided with blind hole, in be inserted with the agnail bar, its agnail that exposes part can be inserted the inner chamber of needle stand, can engage with needle stand.

Close bar at core and partly insert the i.e. completion assembling of overcoat part; Its external sleeve crimping is provided with some resilient blocking teeths, pulls out to prevent the core bar accident.

Description of drawings;

Concrete structure of the present invention is provided by following embodiment and structural representation.

Fig. 1 is the structural representation of bar syringe of contracting.

Fig. 2 contracts the bar syringe at the instant configuration state sketch map of injection completion.

Fig. 3 is the later structural representation of bar injector to inject completion that contracts.

Fig. 4 is the jacket structure sketch map of bar syringe of contracting.

Fig. 4-the 1st, longitudinally the central shaft half-twist jacket structure sketch map of bar syringe that contracts.

Fig. 4-the 2nd, the structural representation of bar syringe jacket one end that contracts.

Fig. 5 is the structural representation of bar syringe core rod of originally contracting.

Fig. 5-the 1st, the bar syringe core rod structural representation of central shaft half-twist longitudinally contracts.

Fig. 6 is the push rod cap sketch map of bar syringe of contracting.

Fig. 6-the 1st, the structural representation of the bar injector push-rod medicated cap uropore end that contracts.

Fig. 6-the 2nd, the structural representation of the bar injector push-rod medicated cap threaded end that contracts.

Fig. 6-the 3rd, longitudinally the central shaft half-twist push rod cap sketch map of bar syringe that contracts.

Fig. 7 is the bar syringe needle structural representation of (comprising needle tubing) that originally contracts.

Fig. 8 is the structural representation of bar syringe agnail bar of originally contracting.

Fig. 9 is the structural representation of bar syringe piston of originally contracting.

Figure 10 is the structural representation of bar syringe spring of originally contracting.

Originally the contract structural representation of bar syringe sheath of Figure 11.

The specific embodiment:

With reference to Fig. 1, Fig. 4, the bar syringe jacket 1 that contracts is hollow circular cylinder basically, and opening part is provided with apical ring 18 and blocking teeth 17, and overcoat is the female cone head 20 of end for giving prominence in addition; Apical ring 18 is hollow circle shape, and its internal diameter is less than or equal to the perforation 12 of push rod medicated cap 8, and compression plays apical tooth to guarantee fully, discharges resilience energy; Blocking teeth 17 forms a strip elastic strip through stopping backlash 19, and the flank of tooth is the inclined-plane, can let core bar insert easily and stops the baffle ring 21 of core bar, prevents that core bar 2 accidents from pulling; The internal diameter of female cone head 20 is slightly less than and cooperates needle stand 3 excircle dimensions with it, to reach the close-fitting effect.

With reference to Fig. 1, Fig. 5, the core bar 2 of the bar syringe that contracts is multiple cylindrical shape, and an end is provided with by hands 14, solid spring base 19 and closely consolidates spring base 19 1 ends and is provided with contractile bullet apical tooth 15, and the other end is provided with baffle ring 21 and blind hole 16; The circle footpath of pressing hands 14 again greater than spring 6 external diameters, can produce pressuring spring 6 effects less than push rod medicated cap 8; Gu spring base 22 external diameters are less than spring 6, with fixing spring 6 positions; Play apical tooth 15 for the Eight characters opens shape, under the longitudinal stress situation, can support the edge of perforation 10, and leave the gap of horizontal retraction, shrink, can pass perforation 10 receiving under the situation of center position compressing the Eight characters to open shape; Baffle ring 21 is a round pie, can stop that piston 5 retreats, and pulls out under the situation blocking teeth 17 effective anti-avulsions through overcoat 1 in core bar 2 accidents; Blind hole 16 can be inserted agnail bar 4.

With reference to Fig. 1, Fig. 6,8 ones on the bar injector push-rod medicated cap that contracts is hollow round can shape, is provided with uropore 10 and bores a hole 12; Uropore 10 edges are provided with uropore tooth 11, and uropore tooth 11 produces certain elasticity through uropore backlash 13, and the flank of tooth of uropore tooth 11 is unidirectional inclined-plane, so that inserting by hands 14 of core bar 2 can stop withdrawing from by hands 14 again; The size of perforation should be greater than core bar 2 external diameters again less than spring inside diameter, when core bar 2 and spring 6 passes uropore 10 and 12 (the passing uropore 10) of boring a hole by hands 14 after promptly can't break away from, reach the purpose that engages of push rod medicated cap 8 and core bar 2.

With reference to Fig. 1 and Fig. 7, needle stand 3 and needle tubing 9 are built in female cone head 20 places and overcoat 1 close-fitting of overcoat 1.

With reference to Fig. 1 and Fig. 8, agnail bar 4 is a double end rustless steel agnail, and an end inserts and engages with core bar 2, and the other end inserts needle stand 3 inner chambers and engages with needle stand 3.

With reference to Fig. 1 and Fig. 9, piston 5 is a hollow polycyclic body, is installed in to insert overcoat 1 behind core bar 2 one ends to prevent the medicinal liquid seepage.

With reference to Fig. 1 and Figure 10, spring 6 is for the stainless steel material manufacturing and have relative pull-back forces that enough elastic force is arranged, and its size should be less than pressing hands 14 and greater than solid spring base 22.

With reference to Fig. 1, Fig. 4, Fig. 7, Figure 11, needle stand 3 insert from outer running-on and are installed in outer taper 20, and it is bonding that needle tubing 9 inserts needle stand 3 usefulness bonding agents, and cover upper jacket 7 forms outer jacket member partly.

With reference to Fig. 1, Fig. 5, Fig. 6, Figure 10, core bar 2 is put on spring 6, continue to penetrate the uropore 10 of push rod medicated cap 8 and bore a hole 12, and holddown spring 6, the edge that makes the bullet apical tooth eject the perforation 12 of supporting push rod medicated cap 8 forms fixing, accomplishes core bar 2 and engages with push rod medicated cap 8.

With reference to Fig. 1, Fig. 5, Fig. 6, Fig. 8, Fig. 9, Figure 10, after accomplishing core bar 2 and push rod medicated cap 8 engages, piston 5 is installed in baffle ring 21 front ends, agnail bar 4 is inserted blind hole 16, accomplish the core bar components.

With reference to Fig. 1, the core bar components is inserted the assembling that outer jacket member is partly promptly accomplished the bar syringe that contracts.

With reference to Fig. 2, when syringe is shifted the end onto, instant agnail bar 4 other ends insert needle stand 3 inner chambers; Collar 14 is oppressed bullet apical tooth 15 simultaneously and in the axle center position, is contracted.

With reference to Fig. 2, Fig. 3, when the bar syringe that contracts is shifted the end onto, instant agnail bar 4 other ends insert needle stand 3 inner chambers; Top spring coil 14 is oppressed simultaneously and is played apical tooth 15 and in the axle center position, contract, and the resilience energy of spring 6 obtains discharging, and is pushed to uropore 10 by hands 21 and colluded by uropore tooth 11 to stumble; Owing to contract behind the core bar 2, drive the inner chamber that needle stand 3 and needle tubing 9 break away from the female cone head 20 of overcoat 1 simultaneously, be pulled in the overcoat 1; If draw core bar 2 again, baffle ring 21 will touch blocking teeth 17 and can not pull, and the bar syringe that contracts thus can not have been reused, and needle tubing very first time after use is protected.

Adopt conventional fabrication processes can accomplish the manufacturing of product.

Claims

1. bar syringe that contracts; Being suitable for clinical injection uses; By be installed in core bar 2 in the overcoat 1, be installed in overcoat needle stand 3, be installed in needle stand 3 needle tubing 9, be installed in the agnail bar 4 of core bar 2 one ends; Be installed in the push rod medicated cap 8 of core bar 2 one ends, the piston 5 that is installed in core bar 2 one ends and sheath 7 and form, it is characterized in that the push rod medicated cap 8 that engages with core bar 2.

2. the bar syringe that contracts according to claim 1 is characterized in that being placed in the spring 6 in the push rod medicated cap 8.

3. the core bar 2 of the bar syringe that contracts according to claim 1 is characterized in that being provided with bullet apical tooth 15.

4. the push rod medicated cap 8 of the bar syringe that contracts according to claim 1 is characterized in that being provided with uropore tooth 11.

5. the push rod medicated cap 8 of the bar syringe that contracts according to claim 1 is characterized in that uropore backlash 13.

6. the push rod medicated cap 8 of the bar syringe that contracts according to claim 1 is characterized in that being provided with perforation 12.