CN2574701Y

CN2574701Y - Medical oxygen humidifier

Info

Publication number: CN2574701Y
Application number: CN 02272920
Authority: CN
Inventors: 武青峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-29
Filing date: 2002-08-29
Publication date: 2003-09-24
Anticipated expiration: 2012-08-29

Abstract

The utility model relates to an improved self-destroying type disposable syringe, which comprises a core bar (1), an outer sleeve (2) and a puncture system (3) which is embedded into a groove (21) at the front end of the core bar (2), and the groove (21) is rearward extended in axial direction. The puncture system (3) comprises a crown bar (32) and a thimble (33), and the front end of the groove (21) is provided with a stop piece (4) for limiting the movement range of the puncture system (3). The front part (321) of the crown bar (32) is inserted into a tight matching groove (11) of the outer sleeve (1), the thimble (33) is matched with a leg (323) of the crown bar (32), and an inverse hook (332) is positioned above a top foot (326) of the crown bar (32). The utility model has the advantages that the utility model is both suitable for a large-capacity syringe and a small-capacity syringe such as a syringe of 1 ml and also has the advantages of simple structure and more convenient use.

Description

The modified model re-use preventing once-used syringe

Technical field this utility model relates to technical field of medical instruments, particularly relates to disposable syringe.

Background technology disposable syringe of the prior art is for fear of self-desttruction equipment interlock self-destruction in advance in assembling and transportation mostly; need be provided with on the core bar protection bolt with fixing core bar with respect to the position of overcoat back cover; core bar can not be assembled at the end; cause taking out medicine and in the syringe residual air is arranged before; such disposable syringe complex structure, use inconvenience, and do not have the blood drawing function.In order to overcome above-mentioned shortcoming, the Chinese patent 01258513 of the applicant's application has proposed a kind of simple in structure, easy to use, and can the system of puncturing makes the re-use preventing once-used syringe of standard component.The above-mentioned system of puncturing is applicable to the syringe that capacity is big slightly, for 1 milliliter of syringe that waits low capacity, is difficult to embed the system that punctures as above-mentioned patent owing to the piston shank diameter is too little.

The summary of the invention the purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of high capacity that both had been fit to for 1 milliliter of particularly effective modified model re-use preventing once-used syringe such as low capacity such as grade.

The purpose of this utility model can be by realizing by the following technical solutions:

Design, a kind of modified model re-use preventing once-used syringe of use comprise overcoat and core bar, and described core bar front end has the groove that axially extends back, and described groove accommodates the system of puncturing, and this system of puncturing comprises push rod and thimble; Described groove front end is useful on the locating part that restriction punctures the system motion scope;

Described thimble comprises the overhead kick at middle part and the needle point of tail end;

Described push rod comprises the front portion that can insert overcoat back cover tight fit groove, spacing convex shoulder in middle part and shank, and described front portion and tight fit groove are interference fit, shank comprises the top foot of outside projection and rear inside thereof from front to back;

When assembling was finished, inserted in the tight fit groove of overcoat the front portion of push rod; Described thimble cooperates with the shank of push rod, and its overhead kick is positioned on the foot of push rod top.

Compare with prior art, advantage of the present utility model is:

1. not only be suitable for jumbo syringe, and be suitable for the syringe of low capacity such as 1ml;

2. simple in structure, use convenient.

Description of drawings

Fig. 1 is the decomposing schematic representation that this utility model embodiment one punctures system;

Fig. 2 is the sketch map of this utility model embodiment one core bar;

Fig. 3 is the sketch map that this utility model embodiment one assembles when finishing;

Fig. 4 is that this utility model embodiment one takes out the medicine sketch map of moment;

Fig. 5 is the sketch map of this utility model embodiment one in taking out the medicine process;

Fig. 6 is that this utility model is implemented the sketch map that an injection has been finished.

Fig. 7 be this utility model embodiment two puncture the system decomposition sketch map;

Fig. 8 is the sketch map of this utility model embodiment two core bars;

Fig. 9 is the sketch map that this utility model embodiment two assembles when finishing;

Figure 10 is that this utility model embodiment two takes out the medicine sketch map of moment;

Figure 11 is the sketch map of this utility model embodiment two in taking out the medicine process;

Figure 12 is the sketch map that this utility model embodiment two injects when nearly finishing;

Sketch map when Figure 13 is this utility model embodiment two enclosed slot diapire 211 that injection is finished, syringe thimble 33 has punctured core bar groove 21;

The specific embodiment is described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.

Embodiment one of the present utility model as shown in Figures 1 to 3, comprise overcoat 1 and core bar 2, described core bar 2 front ends have the groove 21 that axially extends back, and these groove 21 inwalls have groove 24, described groove 21 accommodates the system of puncturing 3, and this punctures system 3 and comprises push rod 32 and thimble 33.Described groove 21 front ends are useful on the locating part 4 that restriction punctures system's 3 range of movement; This locating part 4 is an annular sleeve, and convex shoulder 41 is arranged on the axle sleeve outer wall, described axle sleeve and thimble 33 integrated injection moldings.

Described thimble 33 comprises the overhead kick 332 at middle part and the needle point 333 of tail end.Described push rod 32 comprises the front portion 321 that can insert overcoat 1 back cover tight fit groove 11, spacing convex shoulder 322 in middle part and shank 323, described push rod anterior 321 is an interference fit with tight fit groove 11, shank 323 comprises the top foot 326 of outside projection 324 and rear inside thereof from front to back, described inboard is meant the mating surface of push rod 32 and thimble 33, and the outside is the inboard back side.

When assembling was finished, inserted in the tight fit groove 11 of overcoat 1 front portion 321 of push rod 32; The convex shoulder 41 of annular sleeve 4 embeds in the groove 24 of described core bar 2; Described thimble 33 cooperates with shank 323 inboards of push rod 32, and its overhead kick 332 is positioned on the top foot 326 of push rod 32.

In the moment of taking out medicine, as shown in Figure 4, the front portion 321 of push rod 32 is blocked by the tight fit groove 11 on the overcoat 1, axle sleeve 4 outer wall convex shoulders 41 withstand the upper limb of core bar 2 inner wall trench 24, driving thimble 33 outwards pulls out together with core bar 2, thereby axle sleeve 4 and thimble 33 move backward with respect to push rod 32, and the overhead kick 332 at thimble 33 middle parts is pulled to after the top foot 326 of push rod 32 ends.When moving axle sleeve 4 to and withstand the projection 324 of push rod 32 shanks, as shown in Figure 5, axle sleeve 4 drives push rods 32 and move backward, makes the described tight fit groove 11 of front portion 321 disengagings of push rod 32.

During injection, promote core bar 2 and travel forward; When injection nearly finished, the top foot 326 of push rod 32 ends withstood the middle part overhead kick 332 of thimble 33.When the medicinal liquid in the syringe all injected, as shown in Figure 6, the front portion 321 of push rod 32 entered the tight fit groove 11 of overcoat 1, and the tail end needle point 333 of thimble 33 punctures the diapire 211 of core bar 2 grooves 21, thereby syringe is realized self-destruction.

This utility model embodiment two to shown in Figure 9, comprises overcoat 1 and core bar 2 as Fig. 7, and described core bar 2 front ends have the groove 21 that axially extends back, and described groove 21 accommodates the system of puncturing 3, and this punctures system 3 and comprises push rod 32 and thimble 33; Described groove 21 front ends are useful on restriction and puncture the limited part 4 of system's 3 range of movement, and this limited part 4 is independent axle sleeves, on this axle sleeve outer wall convex shoulder 41 is arranged, and cooperate with overhead kick 22 on groove 21 walls.

Described thimble 33 comprises the overhead kick 332 at front end convex shoulder 34, middle part and the needle point 333 of tail end.Described push rod 32 comprises the front portion 321 that can insert overcoat 1 back cover tight fit groove 11, spacing convex shoulder 322 in middle part and shank 323, described push rod anterior 321 is an interference fit with tight fit groove 11, shank 323 comprises the top foot 326 of outside projection 324, inboard convex shoulder 325 and rear inside thereof from front to back, described inboard is meant the mating surface of push rod 32 and thimble 33, and the outside is the inboard back side.

When assembling was finished, inserted in the tight fit groove 11 of overcoat 1 front portion 321 of push rod 32; Described thimble 33 is fitted with shank 323 inboards of push rod 32, and its front end convex shoulder 331 is positioned on the convex shoulder 325 of push rod 32, and overhead kick 332 is between the convex shoulder 325 and top foot 326 of push rod 32.

In the moment of taking out medicine, as shown in figure 10, the front portion 321 of push rod 32 is blocked by the tight fit groove 11 on the overcoat 1, axle sleeve 4 outer wall convex shoulders 41 are blocked drive thimble 33 by the overhead kick 22 of core bar 2 inwalls and outwards pull out together with core bar 2, thereby axle sleeve 4 and thimble 33 move backward with respect to push rod 32, and the overhead kick 332 at thimble 33 middle parts is pulled to after the top foot 326 of push rod 32 ends.But because the front end convex shoulder 331 of thimble 33 is blocked by push rod 32 inboard convex shoulders 325, so thimble 33 can not break away from push rod 32; Described axle sleeve 4 is blocked by push rod 32 outside projectioies 324, so push rod 32 can not break away from axle sleeve 4 yet.When moving axle sleeve 4 to and withstand the projection 324 of push rod 32 shanks, as shown in figure 11, axle sleeve 4 drives push rods 32 and move backward, makes the described tight fit groove 11 of front portion 321 disengagings of push rod 32.

During injection, promote core bar 2 and travel forward; When injection nearly finished, as shown in figure 12, the top foot 326 of push rod 32 ends withstood the middle part overhead kick 332 of thimble 33.When the medicinal liquid in the syringe all injected, as shown in figure 13, the front portion 321 of push rod 32 entered the tight fit groove 11 of overcoat 1, and the tail end needle point 333 of thimble 33 stabs out the diapire 211 of core bar 2 grooves 21, thereby syringe is realized self-destruction.

Locating part 4 of the present utility model can also with core bar 2 integrated injection moldings.

As Fig. 2 or shown in Figure 8, radial hole 23 is arranged below the diapire 211 of adjacent described core bar 2 grooves 21 of this utility model, described diapire 211 thickness are below 0.5mm.

The described system 3 that stabs out both can be assemblied on the two-piece-dress of being made up of overcoat and core bar, can be assemblied in again on the three-piece of being made up of overcoat, core bar and " O " RunddichtringO; Simultaneously, be equipped with the two-piece-dress of the system of puncturing or three-piece conehead promptly can be mid-also can be biasing.When the conehead of described overcoat 1 was mid-, tight fit groove 11 was the conehead endoporus; During the conehead biasing, tight fit groove 11 has same central axis with overcoat 1.

Claims

1. a modified model re-use preventing once-used syringe comprises overcoat (1) and core bar (2), it is characterized in that:

Also comprise the system of puncturing (3), describedly puncture the groove that axially extends back (21) that system (3) embeds described core bar (2) front end, this punctures system (3) and comprises push rod (32) and thimble (33), and described groove (21) front end is useful on the locating part (4) that restriction punctures system (3) range of movement;

Described thimble (33) comprises the overhead kick (332) at middle part and the needle point (333) of tail end;

Described push rod (32) comprises the front portion (321) that can insert overcoat (1) back cover tight fit groove (11), middle part spacing convex shoulder (322) and shank (323), described front portion (321) is an interference fit with tight fit groove (11), and shank (323) comprises the top foot (326) of outside projection (324) and rear inside from front to back;

When assembling was finished, inserted in the tight fit groove (11) of overcoat (1) front portion (321) of push rod (32); Described thimble (33) cooperates with the shank (323) of push rod (32), and its overhead kick (332) is positioned on the top foot (326) of push rod (32).

2. modified model re-use preventing once-used syringe as claimed in claim 1 is characterized in that: described locating part (4) is an annular sleeve, and convex shoulder (41) is arranged on this axle sleeve outer wall.

3. modified model re-use preventing once-used syringe as claimed in claim 2 is characterized in that: described annular sleeve and thimble (33) integrated injection molding cooperates with groove (24) on groove (21) wall.

4. modified model re-use preventing once-used syringe as claimed in claim 2 is characterized in that: separately molding of described annular sleeve and thimble (33) cooperates with overhead kick (22) on groove (21) wall.

5. modified model re-use preventing once-used syringe as claimed in claim 4, it is characterized in that: there is convex shoulder (325) shank (323) inboard of described push rod (32), the front end of described thimble (33) has convex shoulder (331), during assembling, this convex shoulder (331) is positioned on the convex shoulder (325) of push rod (32), and its overhead kick (332) is positioned between the convex shoulder (325) and top foot (326) of push rod (32).

6. modified model re-use preventing once-used syringe as claimed in claim 1 is characterized in that: described locating part (4) and described core bar (2) integrated injection molding.

7. modified model re-use preventing once-used syringe as claimed in claim 1 is characterized in that: below the diapire (211) of adjacent described core bar (2) groove (21) radial hole (23) is arranged.

8. modified model re-use preventing once-used syringe as claimed in claim 7 is characterized in that: described groove diapire (211) thickness is below 0.5mm.