CN2812957Y

CN2812957Y - Safety syringe (III)

Info

Publication number: CN2812957Y
Application number: CN 200520115049
Authority: CN
Inventors: 赖水生
Original assignee: XIANGGUANG INTERNATIONAL FINANCIAL CO Ltd
Current assignee: Yufeng International Technology Co.,Ltd.
Priority date: 2005-07-29
Filing date: 2005-07-29
Publication date: 2006-09-06
Anticipated expiration: 2015-07-29

Abstract

The utility model discloses a safety injector (III), which comprises an injection cylinder, a push rod and a needling instrument group, wherein the injection cylinder is a hollow cylinder body, a collection segment is formed at one end of the injection cylinder and the other end is provided with a finger support segment. A containing chamber is formed in the injection cylinder, a protrusion hole which is communicated with the containing chamber is formed in the collection segment, wherein the hole diameter of the protrusion hole is smaller than the hole diameter of the containing chamber and a bell mouth is formed by the protrusion hole close to the direction of the containing chamber. The push rod is inserted in the containing chamber of the injection cylinder in a linear slide mode, the needling instrument group comprises a joint sleeve which is provided with a containing part penetrated and communicated in an axial direction, the top end of the joint sleeve is provided with a needling instrument and an oblique cone segment is formed at a bottom end. The safety injector can be used for deviating the needling instrument group completely and reducing the influence of the accuracy of medicament capability in the injection cylinder resulted from the joint sleeve greatly.

Description

Safety injector (three)

Technical field

This utility model relates to a kind of safety injector.

Background technology

Syringe is an auxiliary appliance indispensable on the medical procedures, for avoiding causing disease propagation because of reusing syringe needle, syringe now all adopts disposable, to stop reusing of syringe, yet, with after the syringe Chang Yin that abandons deal with improperly and cause medical personnel or cleaning personnel injured or catch because of the false touch injection needle.Therefore, the syringe needle after how preventing to use is stabbed other people because of false touch, just becomes the problem of syringe construction designing institute emphasis consideration now.

At present, handle using the practice of back syringe, is the injection needle injection to be finished pull back to injection tube, promptly belongs to the safety injector of typically taking in type with Bi Huila as " safety injector " of TW patent M262195 number.It mainly screws togather mutually by needle tubing seat and the clutch collar that is inserted with injection needle, and offer a taper hole in the root edge of clutch collar, the hole periphery also is provided with buckling device, and vertically extend a jut down in a side of clutch collar, when making it to penetrate taper hole and buckling device, the taper projection that pushes away fluid column plug front end fastens when spacing, jut just and elastic piston be the relation of replacing, to push away fluid column gets back into and draws and drive when contracting to injection tube in the needle set group, then elastic piston provides an elastic force for jut, but make needle set group automatic deviation, the injection needle of needle set group front end then can't advance against injection tube, thereby can prevent that the injection needle that abandons from accidentally injuring.

Yet, the structural design of above-mentioned known safety injector, anxious part to be improved is still arranged, from known safety injector figure as can be known, the pedestal part of this clutch collar root edge relies on an O type ring to be resisted against the internal face of injection tube, therefore when retracting, this jut also can't reach the function that is offset certain distance fully, main because this clutch collar root edge is subject to the internal face that this O type ring is resisted against injection tube, therefore there is no the space can make needle set group deflection, and can't reach the purpose that departs from fully.

In addition, this is set in the clutch collar of prominent hole portion, being one towards the pedestal part of outer rim expansion and injection tube inside by the bottom concerns against anticreep, relatively also because the protruding room that is exposed to injection tube of this pedestal part, the shortcoming that causes the injection tube off-capacity of this storage medicinal liquid, though this shortcoming can be by prolonging or widening injection tube and solve, for the injection tube of the fixed unified capacity of various medicinal liquid reserves, injection tube is widened or prolonged then needs extra die sinking to cause cost to improve.If do not prolong or increase the injection tube size, when the amount of liquid medicine inaccuracy, can make the drug effect of injection human body can't be precisely controlled again.

The utility model content

At the problems referred to above, the purpose of this utility model is to provide a kind of needle set group that makes to depart from fully and can significantly reduce clutch collar for the accurate sex safety injector of agent capacity in the injection tube (three).

For achieving the above object, technical solution of the present utility model is:

A kind of safety injector (three), this safety injector includes:

One injection tube, this injection tube is a hollow cylindrical body, the one end is formed with the section of bringing together, the other end is provided with a holder section of finger, this injection tube inside then forms a room, this is brought intrasegmental part together and is formed with and is connected with this room and less than the prominent hole in room aperture, this prominent hole is formed with a horn mouth near the room direction;

One push rod, but this push rod be plugged in the straight line slip mode in the room of this injection tube, the one end is provided with the elastic piston that can be tight against wall slip in this injection tube room, this elastic piston one side is provided with a tenon, the other end is formed with one by the finger;

One needle set group, this needle set group includes a clutch collar, this clutch collar is provided with a holding part that axially runs through connection, this clutch collar top is provided with needle set, and the bottom is formed with an oblique conical section, and the maximum radius of this oblique conical section is less than the radius of this injection tube room, the bottom outer rim of this oblique conical section is extended with a jut down, this clutch collar is inserted in when dashing forward the hole, and the oblique conical section bottom surface is just mutually concordant with iiared port, and the then protruding room that is exposed to of jut is replaced outward and with the elastic piston under injecting the state that finishes mutually.

Further, described oblique conical section convexes with a holding section of matching with described tenon inwardly near the wall edge of bottom surface.

Further, described prominent hole inner frieze is formed with one and can cooperates an O type ring described clutch collar to be positioned the draw-in groove in described prominent hole.

Further, described prominent hole inner frieze is formed with one and can merges the draw-in groove that described clutch collar is positioned described prominent hole with described clutch collar integrally formed ring protruding matching.

Because the maximum radius of this utility model oblique conical section is less than the room radius of injection tube, the root edge of this oblique conical section and the inwall of injection tube still keep certain distance when therefore drop-down, make the injection tube purpose of skew really thereby can reach; In addition, because the oblique conical section of this utility model clutch collar and horn mouth are one and trim shape, therefore clutch collar does not occupy the room space in the injection tube, and only has jut to stretch in the room, therefore can significantly reduce the influence of clutch collar for agent capacity accuracy in the injection tube; And because O type ring of the present utility model can directly be positioned the top of oblique conical section, can be resisted against the wall in prominent hole, therefore have anti-impervious liquid and localized purpose equally.

Description of drawings

Fig. 1 is the STRUCTURE DECOMPOSITION sketch map of this utility model safety injector (three);

Fig. 2 is the overall appearance generalized section of this utility model safety injector (three);

Fig. 2 A is the section signal of the clutch collar bottom scalene cone of this utility model safety injector (three);

Generalized section when Fig. 3 is this utility model safety injector (three) injection use;

Generalized section when Fig. 4 pulls back for this utility model safety injector (three) needle set group;

Skew shape signal when Fig. 5 pulls back to the bottom for this utility model safety injector (three) needle set group;

Fig. 6 is the local appearance generalized section of this utility model safety injector (three) embodiment two;

Fig. 7 is the clutch collar schematic appearance of this utility model safety injector (three) embodiment two;

The figure number explanation:

10, injection tube 11, the section of bringing together 12, the holder section of finger 13, room

14, prominent hole 141, horn mouth 15, draw-in groove 20, push rod

21, shaft 22, by finger 23, joint portion 24, tenon

25, elastic piston 31, needle tubing 32, needle tubing seat 321, snap ring

322, external screw thread 33, clutch collar 33a, clutch collar 331, adapter section

331a, adapter section 332, oblique conical section 332a, oblique conical section

333, ring groove 334, holding part 335, holding section

336, perforation 337, female thread 338, jut 34, O type ring

34a, ring are protruding 35, lid A, taper hole B, buckling device

The specific embodiment:

A kind of safety injector of this utility model (three), as shown in Figure 1, this safety injector comprises:

Injection tube 10, this injection tube 10 is a hollow cylindrical body, one end is formed with a section of bringing together that slightly contracts 11, the other end is formed with the holder section of finger 12 of an expansion shape, at the injection tube 10 inner rooms 13 that form, the section of bringing together 11 inside then are provided with the prominent hole 14 in the convergent aperture that is communicated with room 13, be formed with the retaining edge at smaller prominent hole 14 joining places of room 13 and aperture, the close room direction in this columned prominent hole flaring inwardly becomes the horn mouth 141 of inclination, should cooperate this horn mouth and form one " funnel " shape in prominent hole 14, and prominent hole 14 is provided with a draw-in groove 15 with bell-mouthed adjacent wall ring;

One push rod 20, in the movable room 13 that is plugged in injection tube 10, and can in room, do linear reciprocation and slide, shaft 21 tail ends of this push rod 20 be formed with enlarge shape by finger 22, front end then forms one by several joint portions 23 that disk body constituted at interval, these joint portion 23 front ends extend a tenon 24, and other is located at joint portion 23 after having an elastic piston 25 to pass tenon 24;

One needle set group, include a needle tubing 31, a needle tubing seat 32 and a clutch collar 33, wherein: this needle tubing 31 plugs and is fixed in the needle tubing seat 32, appropriate location on the needle tubing seat 32 is formed with the round clasp 321 of an outer expanding shape, form an abutment face during for lid 35 upper shield needle bodies, snap ring 321 belows of needle tubing seat 32 are provided with external screw thread 322, and a clutch collar 33 is used to be spirally connected;

Clutch collar 33, be inserted in towards prominent hole direction by room, and for guaranteeing the joint adaptation in clutch collar and prominent hole, the shape of clutch collar 33 is corresponding with " funnel " shape in prominent hole 14, this funnel-form clutch collar 33 comprises a circular adapter section 331 and an oblique conical section 332, adapter section 331 and oblique conical section 332 confluce appearance edge are formed with the ring groove 333 than path, also be arranged with elastomeric O-rings 34 in the ring groove 333, when clutch collar 33 is inserted in prominent hole 14, O type ring 34 external diameters just drop in the draw-in groove 15 that prominent wall surface of the hole ring establishes, to strengthen the bond strength between clutch collar and prominent hole, to have the effect that prevents that clutch collar 33 is broken away from by injection direction; The maximum radius of this oblique conical section 332 is less than the room radius of injection tube in addition.

As Fig. 2, shown in 3, clutch collar axially is formed with a holding part 334 that runs through connected state, holding part 334 also is communicated with the taper hole A of oblique conical section bottom surface convergent formation inwardly, be provided with a plurality of buckling device B that wait the radian configuration around this taper hole A, this buckling device B convexes with a holding section 335 inwardly by the wall edge of taper hole A, holding section 335 intermediate formation, one perforation 336, perforation 336 is shown in Fig. 2 A, during use tenon snapped in taper hole A, can pass smoothly perforation and and holding section formation fasten shape, the elastic tenon 24 of summary tool passes perforation 336 and is installed with in holding

part

334, and 24 of the tenons of elastic reset can't detach again.

In addition, holding part 334 walls that are positioned at adapter section are equipped with female thread 337, can be screwed into combination for the external screw thread 322 of needle tubing seat 32, the default place of oblique conical section 332 bottom surface outer peripheral edges and down one extend a jut 338, protruding being exposed to outside the room 13 under jut 338 normalities, the elasticity that the elastic piston of push rod front end just is subjected to this jut 338 when push rod pushes is fully replaced.

Because the maximum radius of this oblique conical section is less than the room radius of injection tube, the root edge of this oblique conical section and the inwall of injection tube still keep certain distance when therefore drop-down, and can reach the effect of skew.

In addition clutch collar 33 bottom oblique conical sections 332 and bottom, prominent hole horn mouth 141 be nested fashionable, oblique conical section 332 retaining edge proper and room and prominent hole joining place trim, jut 338 protruding being exposed to outside the room 13 only, make clutch collar 33 except that jut 338, all be located in the prominent hole 14, this kind structure makes the space of the storage medicinal liquid of room become big, and the change of medicinal liquid storage area for the syringe of little CC number (as the 1CC syringe), more has the practicality effect of getting instant result greatly.

As shown in Figure 3, when push rod 20 is pushed into the location forward, tenon 24 passes perforation 336 and is installed with in holding part 334, and is the state of fastening with 335 upper surfaces, holding section, and the elastic piston 25 of push rod front end then is subjected to protruding the replacing and slightly deformed of the outer jut 338 of room that be exposed to;

As Fig. 4, shown in 5, can be related when push rod 20 is pulled back with pulling of needle set group and the prominent hole 14 of disengaging, continue to pull back when in the needle set group, contracting to the injection tube room, as shown in Figure 5, then can apply an elastic pushing pressure by 25 pairs of juts 338 of elastic piston of compressive deformation, interior contracting to the pushing and pressing of the needle set group elasticity of room is the deflection shape, and the inwall of this oblique conical section root edge and injection tube maintains certain distance, so can rely on the angle of its skew to reach effective deviation distance, and the retaining edge of needle tubing 31 and injection tube 10 inside is fastened mutually, make needle tubing 31 can't push the protruding outside that is exposed to once more, can prevent that needle tubing from the thing that the people stabs taking place.

Shown in Fig. 6,7, the embodiment two of this utility model safety injector (three), the clutch collar 33a of this embodiment, adapter section 331a and oblique conical section 332a confluce, one convexes with the protruding 34a of a ring outwardly, when making clutch collar 33a be inserted in prominent hole 14, can overlap card mutually by this draw-in groove 15 that encircles protruding 34a and prominent hole 14 wall edge, as shown in Figure 6, so that the combination between needle set group and injection tube is more firm.

In addition, this utility model with the prominent hole of funnel-form with match by the funnel-form clutch collar that adapter section and oblique conical section constituted, only need clutch collar 33 is inserted in the prominent hole 14, can make assembling more accurate, quick by adapter section 331 and oblique conical section 332 confluces and the horn mouth 141 formation one location relation of clutch collar.

Claims

1, a kind of safety injector (three), it is characterized in that: this safety injector includes:

2, safety injector as claimed in claim 1 (three) is characterized in that: described oblique conical section convexes with a holding section of matching with described tenon inwardly near the wall edge of bottom surface.

3, safety injector as claimed in claim 1 (three) is characterized in that: described prominent hole inner frieze is formed with one and can cooperates an O type ring described clutch collar to be positioned the draw-in groove in described prominent hole.

4, safety injector as claimed in claim 1 (three) is characterized in that: described prominent hole inner frieze is formed with one can merge the draw-in groove that described clutch collar is positioned described prominent hole with the integrally formed ring of described clutch collar protruding matching.