CN101461976A

CN101461976A - Cartridge special for routine insulin of pen type insulin syringe

Info

Publication number: CN101461976A
Application number: CNA2007101448890A
Authority: CN
Inventors: 关和瑜; 关绍雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2009-06-24

Abstract

The invention belongs to the field of medical apparatus, and relates to improvement of a general insulin special refill structure for a pen insulin syringe. Currently, when known pen insulin syringes are used for general insulin, refills still have abundant residual insulin after being used, thereby causing waste. When injection of an inner plunger of the refill of the pen insulin syringe stops, the convex plunger is tallied with the top of a refill bottle and fills the whole space. The invention has the advantages of capability of reducing the residual insulin in the refill of the general insulin refill, simple implementation and obvious economic benefit.

Description

A kind of cartridge special for routine insulin of pen type insulin syringe

Technical field

The invention belongs to medical instruments field, relate to a kind of improvement of cartridge special for routine insulin of pen type insulin syringe structure.

Background technology

At present, when known pen-type insulin syringe was used in insulin regular, pen core still had a lot of insulin surpluses after using, cause waste.Because the used pen core of pen-type insulin syringe, being used in routine or floating type all is that structure is identical.After plunger is injected the stroke end, the floating type insulin requirement leaves certain mixing space, the conventional type insulin has promptly had unnecessary same space, plane column stopper shape in the pen core can not match with pen core shoulder portion in addition, also remain a certain amount of space is arranged, when therefore being used in insulin regular, just make that remaining space is bigger, the insulin surplus is many.

Summary of the invention

In order to overcome existing pen-type insulin syringe when using insulin regular, pen core is using the many problems of back surplus, the invention provides a kind of cartridge special for routine insulin of pen type insulin syringe, when plunger is injected termination, convex plunger and pen core bottle top match, and are full of whole space.Because the planform of pen core shoulder and bottleneck, making has coaxial small plunger at the convex plunger head, there are interface channel or groove to connect between two plungers, the convex column plug structure is a water conservancy diversion slot type plunger, duct formula plunger or dome-shaped plunger, since will with factors such as insulin injection pen cooperates, the convex plungers length in the pen core should increase more than 10%, the improvement of this pen core can reach the purpose that reduces the insulin surplus.

Beneficial effect of the present invention is, can reduce the insulin surplus in the insulin regular pen core, implement simple, obvious economic.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is that insulin pen-cartridge plunger of the present invention makes formula convex plunger front and back, duct structure comparison diagram into.

Sketch map when Fig. 2 is double plunger work.

Among the figure: 1. former plunger, 2. former residue insulin, 3. pen core bottle 4. improves back residue insulin, 5. duct formula convex plunger, 6. circle hole shape passage, 7. water conservancy diversion slot type convex column plug 8. is communicated with groove, 9. main chamber, 10. bottleneck chamber .11. dome convex plunger

The specific embodiment

In embodiment illustrated in fig. 1, the right and left is respectively the comparison diagram that improves final state before and after the convex plunger. and to put be position after pen-type insulin syringe is injected the stroke end to left side former plunger (1) institute off-position among the figure, as seen former residue insulin (2) amount is many, the right side is that the convex plunger is injected the state when stopping among the figure. because the convex of duct formula convex plunger (5) is identical with insulin pen-cartridge bottle (3) top fully, only between convex plunger top and bottleneck, leave certain spacing, good to guarantee the contact of plunger shoulder, and for injecting the termination point. residue insulin (4) amount was considerably less after this method made and improves. because the planform at pen core bottle top, make the convex plunger head that coaxial small plunger be arranged. working properly for guaranteeing, between cavity that small plunger forms and main plunger cavity, have passage.Shown in Figure 2, the sketch map during double plunger work.When left side convex plunger is injected small plunger near bottleneck, main chamber (9) is communicated with and may be sealed with bottleneck chamber (10), and can't continue to inject. be head it off, duct formula convex plunger (5) or water conservancy diversion slot type convex column plug (7) are provided with and are communicated with groove (8) or circle hole shape passage (6) in the present embodiment, and main chamber (9) is communicated with bottleneck chamber (10). and reach and inject normal purpose. the right side is the state of dome-shaped convex plunger (11) when injecting bottleneck among Fig. 2.According to the stroke and the terminating point of general pencil type insulin syringe, the end of convex plunger, increase about 3 millimeters to top shoulder length.

Claims

1. cartridge special for routine insulin of pen type insulin syringe, convex plunger and pen core bottle top match, be full of whole space, at the convex plunger head coaxial small plunger is arranged, there are interface channel or groove to connect between two plungers, the convex column plug structure is a water conservancy diversion slot type plunger, and the convex plungers length in duct formula plunger or the dome-shaped plunger, pen core increases more than 10%.It is characterized in that: plunger and pen core bottle top match, and are full of whole space.

2. the pen-type insulin syringe pen core of telling according to claim 1 is characterized in that: the convex plunger.

3. the pen-type insulin syringe pen core of telling according to claim 1 is characterized in that: at the convex plunger head coaxial small plunger is arranged, have interface channel or groove to connect between two plungers.

4. the pen-type insulin syringe pen core of telling according to claim 1, it is characterized in that: the convex column plug structure is a water conservancy diversion slot type plunger, duct formula plunger or dome-shaped plunger.

5. the pen-type insulin syringe pen core of telling according to claim 1 is characterized in that: the plungers length in the pen core increases more than 10%.