CN2461574Y

CN2461574Y - Torque retracting safety syringe

Info

Publication number: CN2461574Y
Application number: CN 01200934
Authority: CN
Inventors: 王琳; 杨仲信
Original assignee: 王琳; 杨仲信
Current assignee: Uniqsafe Biomeditech Co., Ltd.
Priority date: 2001-01-05
Filing date: 2001-01-05
Publication date: 2001-11-28
Anticipated expiration: 2011-01-05

Abstract

The utility model relates to a torque retracted safe syringe, which comprises a syringe body, a push rod, a needle head connection seat and a needle head. The hole wall of a through hole of the front end of the syringe body is provided with convex hook claws. The outer syringe wall of the back end of the needle head connection seat is provided with a plurality of convex grains. Each convex grain is respectively clamped by each hook claw. The hole of the back end of the needle head connection seat is provided with radial concave teeth. The front end of the push rod is provided with convex teeth which are corresponding to the concave teeth. The utility model has the advantages of easy fabrication and labor saving, and used needle heads can be bended and broken easily. The torque retracted safe syringe can avoid repeated use.

Description

Turning Telescoping Safe Injecting Syringe

This utility model relates to a kind of Turning Telescoping Safe Injecting Syringe.

Known high-safety injection tube structural design, it mainly is after injection, syringe needle is retracted syringe inside, impose deformation failure again, to prevent repeated use, and when throwing aside, do not have a potential safety hazard, as the improvement structure of the novel No. 84212845 little dosage safety syringe cylinder of Taiwan patent application, the formula that conveniently the abandons safety syringe-drum of novel No. 84207022 tool prevention infection, novel No. 84217653 high-safety injection tube, or shown in the improved structure of novel No. 87209311 high-safety injection tube etc.

The commonly see common trait of injection safety syringe technology of relevant above-mentioned grade, (as shown in Figure 1) be in comprising the high-safety injection tube that a syringe 10, a push rod 20, a needle holder 30 and a syringe needle 40 are formed, needle holder 30 is planted in syringe 10 front aperture, and to closely cooperate or stopping of bulge loop structure prevents that needle holder 30 from coming off arbitrarily; Make push rod 20 can destroy the also technology of retracting needle seat 30, be to be provided with the bigger containing hole of a diameter 301 in these needle holder 30 back stomidiums, and establish a cervical region 302 in the nose end edge, the front end of push rod 20 then is provided with a conical hook medicated cap 201; By this, can after user utilizes push rod 20 with the liquid medicine injection, embed in the containing hole 301 of needle holder 30 with this hook medicated cap 201 simultaneously, and catch on cervical region 302 and then needle holder 30 is retracted syringe 10 interior (as shown in Figure 2) together with syringe needle 40 by hook medicated cap 201.

Commonly use push rod 20 as from the foregoing and retract the design of needle holder 30, relative also makes it make quite difficulty; In detail, can laborsavingly retract needle holder 30 for making push rod 20, its needle holder 30 then must reduce with the bonding tightness of syringe 10, so when syringe needle 40 inserts liquid medicine bottle 50 (as shown in Figure 3), the situation of these needle holder 30 retractions takes place easily, causes and can't use.Therefore, this producer certainly will be embodied as tightr with combining of syringe 10 needle holder 30, relative also cause push rod 20 to retract needle holder 30 require great effort more (direction of action as Fig. 4 is illustrated), especially 1st be under the situation of many patient infusions the large hospital nurse, the action that retracts of effort more forms a burden in the work; Simultaneously hook medicated cap 201 taking place easily also and engage power with cervical region 302 less than the engage power of needle holder 30 with syringe 10, causes hook medicated cap 201 and cervical region 302 disengagings and can't play a role.

As desire to avoid this hook medicated cap 201 and cervical region 302 to break away from, then certainly will dwindle cervical region 302 diameters of needle holder 30, or the diameter of increase hook medicated cap 201, make both degree of engaging good, the difficulty that so promptly causes hook medicated cap 201 to embed containing hole 301 increases (as the direction of action signal of Fig. 5), and forms the action of an effort.By being as seen, commonly use the design that push rod 20 retracts needle holder 30, it obtains balanced engaging of each point and labour-saving technology, quite bothers on the implementation, also thereby easily produces many substandard products.

The purpose of this utility model is to provide a kind of Turning Telescoping Safe Injecting Syringe, and is very laborsaving when making syringe cylinder easy to manufacture and safe in utilization, and exhausted syringe needle can be avoided reusing by bending failure easily.

In order to achieve the above object, this utility model provides a kind of Turning Telescoping Safe Injecting Syringe, comprising: a cylindrical shell, a push rod, a syringe needle joint seat and a syringe needle; This cylindrical shell is a hollow cylinder, establishes an axially extending bore in front end; This push rod is to be one shaft-like, forms a circle sleeve column for a sheathed piston ring in front end, and this circle sleeve column leading section is convexly equipped with a tapered cap; This syringe needle joint seat is to be cylindric, is provided with a through hole in central authorities; This syringe needle is to be planted in a barrel forward end by a needle tubing; It is characterized in that:

This cylindrical shell is formed with protruding hook in front end through hole hole wall, and this each hook is distributed in this hole wall, is formed with hook-shaped groove between this each hook, and this hook-shaped groove opening is towards cylinder back-end;

The conical surface place of the tapered cap of this push rod on average is provided with most double wedges;

This syringe needle joint seat is formed with a tapered pole in front end, and the rear end outer tube wall is provided with most protruding grains, is provided with the bigger containing hole of a diameter in this through hole rear end, and this containing hole front bulkhead forms taper, and is provided with radial recessed tooth in the conical surface;

This syringe needle joint seat inserts the through hole of this barrel front end, and this each protruding grain is colluded by this each hook respectively and is stuck in this hook-shaped groove bottom, this syringe needle joint seat front end tapered pole stretch out and with the sleeve of syringe needle fit mutually, this push rod front end inserts in cylindrical shell.

Described Turning Telescoping Safe Injecting Syringe is characterized in that: but the tapered cap tip deflection of this push rod is extended an elastic pressure bar.

Described Turning Telescoping Safe Injecting Syringe is characterized in that: the containing hole front end of this syringe needle joint seat also can be provided with most double wedges, and this its conical surface place of push rod front end tapered cap is provided with most and the corresponding recessed tooth of above-mentioned double wedge.

Described Turning Telescoping Safe Injecting Syringe is characterized in that: the hook in this cylindrical shell through hole can be made as isolating ring-type, and in conjunction with being bonded in this through hole.

In sum, the Turning Telescoping Safe Injecting Syringe that this utility model provides make to make is implemented easily and user can laborsaving syringe cylinder safe in utilization, and exhausted syringe needle can be avoided reusing by bending failure easily.

Now adjoint embodiment is described in detail as follows architectural feature of the present utility model and effect thereof:

Brief description of drawingsfig:

Fig. 1 is the combination section of high-safety injection tube of commonly seeing.

Fig. 2 is the retracted state sketch map of high-safety injection tube of commonly seeing.

Fig. 3 is the caducous sketch map of high-safety injection tube needle holder of commonly seeing.

Fig. 4 retracts needle holder action sketch map for the high-safety injection tube of commonly seeing.

Fig. 5 snaps in needle holder action sketch map for the high-safety injection tube of commonly seeing.

Fig. 6 is the axonometric chart of each member decomposing state of this utility model.

Fig. 7 is the sectional axonometric drawing of this utility model barrel front end.

Fig. 8 is the sectional axonometric drawing of this utility model syringe needle joint seat.

Fig. 9 is combination of the present utility model and passes the operating state sketch map.

Figure 10 agrees with the operating state sketch map of state for this utility model push rod.

Figure 11 reverses syringe needle joint seat action sketch map for this utility model push rod.

Figure 12 retracts syringe needle joint seat view for this utility model push rod.

As shown in Figure 6, Turning Telescoping Safe Injecting Syringe of the present utility model comprises that a cylindrical shell 1, a push rod 2, a syringe needle joint seat 3 and a syringe needle 4 form, wherein:

Cylindrical shell 1, it is to be hollow cylindrical body, it is less and be axial through hole 11 to be provided with a diameter in front end, and the rear end is to be formed with one to refer to collude sheet 12, be formed with the unidirectional hook 111 (as shown in Figure 7) of projection in front end through hole 11 hole walls, make each hook 111 be evenly distributed in hole wall, 111 on each hook constitutes a hook-shaped groove 112 by this, and makes each hook-shaped groove 112 its opening just towards cylindrical shell 1 rear end;

Push rod 2, it is the body of rod that is made of radial fin, its front end is formed with a stepped round sleeve column 21, a sheathed rubber mass to be provided and to be circular piston ring 22, and these circle sleeve column 21 leading sections are established a tapered cap 23, on average be provided with most double wedges 24 in the conical surface place of tapered cap 23, these tapered cap 23 tips are that deflection is extended an elastic pressure bar 25 again, and push rod 2 rear ends then are formed with a pressing tablet 26;

Syringe needle joint seat 3, (as shown in Figure 8) be to be a cylindrical tube shape, be formed with a tapered pole 31 in its front end, and outer tube wall place in rear end is provided with most protruding grain 32 formation circular rows in barrel, syringe needle joint seat 3 its central authorities are provided with an axial through hole 33 again, are provided with the bigger containing hole of a diameter 34 in the stomidium of back, and make the front bulkhead of containing hole 34 form taper, and on average be provided with radial recessed tooth 35 in this conical surface, make containing hole 34 rear ports be formed with a ring cervical region 36;

Syringe needle 4 is to comprise that a sleeve 41 and a needle tubing 42 constitute, and these sleeve 41 central authorities have a circular hole 411, and needle tubing 42 planted to be in sleeve 41 front ends and with circular hole 41 communicates;

The architectural feature of above-mentioned each member of mat, (as shown in Figure 9) even this syringe needle joint seat 3 axially inserts in the through hole 11 of cylindrical shell 1 front end, each protruding grain 32 is colluded by each hook 111 respectively be stuck in each hook-shaped groove 112 bottom, make syringe needle joint seat 3 firmly be incorporated into through hole 11, and the combinative structure that front end tapered pole 31 is stretched out can't be come off by direct push-and-pull, and then with tapered pole 31 cover should the sleeve 41 of syringe needle 4, and with in the push rod 2 front ends insertion cylindrical shell 1, to form Turning Telescoping Safe Injecting Syringe of the present utility model.

Usage operation of the present utility model and the effect of being reached thereof are as described below: please refer to Fig. 9 and shown in Figure 10, after before doctor or nurse are with push rod 2, advancing the injection of row liquid medicine, can continue to push this push rod 2, make the tapered cap 23 of front end and the ring cervical region 36 that elastic pressure bar 25 passes through syringe needle joint seat 3, make tapered cap 23 each double wedge 24 just form and engage, and make this elastic pressure bar 25 compress the through hole 33 side opening walls of syringe needle joint seat 3 with the recessed tooth 35 of containing hole 34 its front ends; (please refer to shown in Figure 11) is in this state, doctor or nurse can reverse this push rod 2 and drive 3 revolutions of syringe needle joint seat with mat concave, convex

tooth

35,24 structures, allow each protruding grain 32 break away from hook-shaped groove 112 bottoms and form no fastening state, so can be under the situation of low-disturbance power, catch on ring cervical region 36 by tapered cap 23 syringe needle joint seat 3 and syringe needle 4 are retracted in the cylindrical shell 1 labour-saving in the lump, and mat elastic pressure bar 25 bends syringe needle joint seat 3 and syringe needle 4 (as shown in figure 12).User also can advance this push rod 2 again, makes needle tubing 42 bending failures of deflection, and reaching can't reusable safe effect.

Because, this utility model is to utilize the hook 111 of this cylindrical shell 1 inside and hook-shaped groove 112 structures that syringe needle joint seat 3 is bestowed to collude card, therefore it can't directly axially be pulled out, can make doctor or nurse firmly needle tubing 42 be inserted liquid medicine bottle and extract liquid medicine, improve the shortcoming that the syringe needle of commonly seeing comes off easily.Poor 112 structures of mat hook 111 and hook-type match with concave,

convex tooth

35,24 engaging revolving structures again, making 3 revolutions of syringe needle joint seat be detached into no fastening state bounces back again, it retracts action also can be comparatively laborsaving, especially can improve each block chalaza strength of high-safety injection tube shortcoming rambunctious of commonly seeing, the effect reached of obvious this utility model has more advance thus.

Above-mentioned explanation only be a preferred embodiment of the present utility model, and the structure of unrestricted other constructed gained down utilizations, for example concave,

convex tooth

35,24 snap-in structures are changed into the driving lever structure, or hook 111 is embodied as separable ring-type, and then in conjunction with being bonded in the through hole 11, and for example double wedge 24 is located in the containing hole 34, and recessed tooth 35 is located at tapered cap 23 surfaces of push rod 2, be feasible.

Claims

1, a kind of Turning Telescoping Safe Injecting Syringe comprises: a cylindrical shell, a push rod, a syringe needle joint seat and a syringe needle; This cylindrical shell is a hollow cylinder, establishes an axially extending bore in front end; This push rod is to be one shaft-like, forms a circle sleeve column for a sheathed piston ring in front end, and this circle sleeve column leading section is convexly equipped with a tapered cap; This syringe needle joint seat is to be cylindric, is provided with a through hole in central authorities; This syringe needle is to be planted in a barrel forward end by a needle tubing; It is characterized in that:

2, Turning Telescoping Safe Injecting Syringe as claimed in claim 1 is characterized in that: the tapered cap tip deflection of this push rod is extended an elastic pressure bar.

3, Turning Telescoping Safe Injecting Syringe as claimed in claim 1 is characterized in that: the containing hole front end of this syringe needle joint seat is provided with most double wedges, and this its conical surface place of push rod front end tapered cap is provided with most and the corresponding recessed tooth of above-mentioned double wedge.

4, Turning Telescoping Safe Injecting Syringe as claimed in claim 1 is characterized in that: the hook in this cylindrical shell through hole is made as isolating ring-type, and in conjunction with being bonded in this through hole.