Patent Application
20130066270
1. Field of Invention
The present invention relates to a disposable safety self-destroyed syringe and more particularly to disposable safety self-destroyed syringe which can effectively reduce pain of patients caused by the force applied in injections and residual amount of injection left in a syringe.
2. Related Art
Currently, injectors or syringes for hypodermic injections are widely applied in the medical field; generally, the injectors can only be used once and are disposed after being used, which are convenient and hygienic to avoid infection of diseases through needles. However, medical personnel can be pricked negligently by exposed needles of disposed injectors, to cause wounds or infected with diseases. If disposed injectors are not handled properly and are discarded in an open environment, others can be easily prinked by the sharp-pointed needles. Environmental workers who handle medical waste are potential victims of the disposed needles. Therefore, many types of safety injectors are produced.
Referring to
However, during the last stage of an injection, in order to have the piston “c” to be depressed to the end, a considerably force is used to push the plunger “a” so that the hook “d” can be conjoined together with the retaining portion “f”. The force can cause pain to patients. In addition, even though the piston “c” is depressed to the end, residual injection is left between the syringe tube “b” and the needle “e”. Therefore, medical personnel will have to draw more liquid medicament to avoid the medical effects being reduced because of the inadequate amount of medicament. Furthermore, the amount of medicament being drawn is inadequate because of negligence of the medical personnel, it will also reduce the medical effects and affect the patient's conditions.
An object of the present invention is to provide a disposable safety self-destroyed syringe which can effectively reduce pain of patients caused by the force applied in injections.
Another object of the present invention is to provide a disposable safety self-destroyed syringe which can effectively reduce residual amount of injection left in a syringe.
In order to achieve the above-mentioned objects, the present invention of a disposable safety self-destroyed syringe comprises a plunger and a syringe tube. An end of the plunger is sleeved with a piston. A protrusive column, which is elastic, is coupled inside the piston. A front end of the protrusive column is protruded to a distance from a top surface of the piston. The syringe tube has a front end and a rear end, the plunger is inserted into the syringe tube from its front end for injection, while the rear end is contracted radially to form a needle seat to be conjoined with a needle. A blocking portion is disposed on an inner wall of the needle seat; so that when the plunger is depressed to reach closely to the rear end of the syringe tube, a front end of the protrusive column is inserted into the needle seat and is stopped by the blocking portion on the inner wall of the needle seat; therefore the protrusive column is retained inside the needle seat. At least one orifice is disposed on the protrusive column for buffering the force of inserting the front end of the protrusive column into the needle seat. The plunger can be detached from the piston and taken out when it is drawn back.
When it is embodied, a wing-shaped portion is disposed at a rear end of the protrusive column for conjoining inside the piston.
When it is embodied, the front end of the protrusive column is formed in a tapered shape.
When it is embodied, the front end of the protrusive column extends upward to form a long post.
When it is embodied, said piston and said protrusive column are made of elastic material.
The present invention will become more fully understood by reference to the following detailed description thereof when read in conjunction with the attached drawings.
As shown in
An end of the plunger 1 is sleeved with a piston 3 which is made of elastic material. A protrusive column 4, which is also made of elastic material, is coupled inside the piston 3. A front end of the protrusive column 4 is in a tapered shape and is protruded to a distance from a top surface of the piston 3. Wherein, a wing-shaped portion 41 is disposed at a rear end of the protrusive column 4 for conjoining inside the piston 3. At least one orifice 42 is disposed on the protrusive column 4.
The syringe tube 2 has a front end 21 and a rear end 22, wherein the plunger 1 is inserted into the syringe tube 2 from its front end 21 for injection, while the rear end 22 is contracted radially to form a needle seat 221 to be conjoined with a needle. A blocking portion 222 is disposed on an inner wall of the needle seat 221.
When it is embodied as shown in
Moreover, as shown in
Therefore, a disposable safety self-destroyed syringe of the present invention has the following advantages:
According to the above disclosure, the present invention can certainly achieve the expected objects by providing a disposable safety self-destroyed syringe which can be practically applied in related industries.
Although the embodiments of the present invention have been described in detail, many modifications and variations may be made by those skilled in the art from the teachings disclosed hereinabove. Therefore, it should be understood that any modification and variation equivalent to the spirit of the present invention be regarded to fall into the scope defined by the appended claims.
