Summary of the invention
For solving the problems referred to above, the present invention provides the safety type blood collecting needle construction of a kind of simple in construction, low cost, excellent performance.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of safety type blood collecting needle construction, including housing, power set, is positioned at the fixing bar of needle bar of housing and is fixed on the blood taking needle of the fixing bar of needle bar;
Described housing is provided with needle outlet;
The fixing locating piece being provided with the fixing bar of fixing needle bar between bar and housing of described needle bar, or the fixing junction point possessing easy breach that is provided with between bar and housing of described needle bar, or described needle bar fixes bar and housing is arranged independently of one another.
Being further used as the improvement of technical solution of the present invention, described blood taking needle is the sharp object of needle-like.
Being further used as the improvement of technical solution of the present invention, described housing is provided with needle outlet.
Being further used as the improvement of technical solution of the present invention, power set are be arranged at the fixing percussion spring between bar and housing of needle bar.
Being further used as the improvement of technical solution of the present invention, described percussion both ends of the spring is provided with and is perpendicular to spring axis, Spring retainer with barb.
It is further used as on the fixing bar of the improvement of technical solution of the present invention, described housing and needle bar and is respectively equipped with the spring fixed hole coordinating placement Spring retainer.
Being further used as the improvement of technical solution of the present invention, housing is positioned at needle outlet both sides and is provided with shutoff damper, the Breadth Maximum of the fixing masthead end of needle bar is more than the Breadth Maximum of needle outlet.
Being further used as the improvement of technical solution of the present invention, needle tip is provided with the seal bar of parcel needle tip.
Being further used as the improvement of technical solution of the present invention, the fixing bar of needle bar extends forward the seal bar being provided with parcel needle tip.
Being further used as the improvement of technical solution of the present invention, the junction that needle point protection rod and needle bar fix bar is provided with portion of easily splitting.
It is further used as the improvement of technical solution of the present invention, the fixing bar of needle bar is provided with the stopping means of the fixing bar both sides of needle bar, be provided with in housing and coordinate stopping means to make the resetting means that the fixing bar of needle bar resets.
Being further used as the improvement of technical solution of the present invention, resetting means is be positioned at the elastic rod that housing tilts to housing bottom or is parallel to housing bottom.
Being further used as the improvement of technical solution of the present invention, housing extends internally and is provided with the elastic rod tilted to housing bottom.
It is further used as the improvement of technical solution of the present invention, the fixing locating piece being provided with the fixing bar of fixing needle bar between bar and housing of described needle bar.
Being further used as the improvement of technical solution of the present invention, described locating piece is the positioning convex and detent that cooperate.
It is further used as the improvement of technical solution of the present invention, the both sides being positioned at the fixing bar of needle bar in housing are provided with resetting block, each resetting block is provided with arc groove, the both sides of the fixing bar of needle bar extend to be provided with fixes, at needle bar, the projection that can snap in arc groove when bar resets, and arc groove is provided with the breach that projection can import arc groove.
Being further used as the improvement of technical solution of the present invention, needle bar is fixing is provided with the junction point possessing easy breach between bar and housing.
Being further used as the improvement of technical solution of the present invention, the fixing bar of described needle bar is arranged independently of one another with housing.
Being further used as the improvement of technical solution of the present invention, the fixing bar of described needle bar departs from housing in enclosure interior setting.
Being further used as the improvement of technical solution of the present invention, the fixing bar tail end of described needle bar extends back and is provided with trigger shaft.
Being further used as the improvement of technical solution of the present invention, housing is provided with the through hole of corresponding trigger shaft.
Being further used as the improvement of technical solution of the present invention, housing is provided with bending mouth.
Being further used as the improvement of technical solution of the present invention, the bottom of housing is needle stand, and needle stand is provided with bending mouth.
Being further used as the improvement of technical solution of the present invention, the outside being positioned at housing is provided with the fixing buckle of housing.
Being further used as the improvement of technical solution of the present invention, needle stand is provided with outward extending gripper shoe.
It is further used as the improvement of technical solution of the present invention, in housing, is provided with the fixing bar motion guide rail of needle bar that the fixing bar of guiding needle bar slides.
It is further used as the improvement of technical solution of the present invention, in housing, is provided with the piggyback pod holding power set.
Beneficial effects of the present invention: this safety type blood collecting needle construction, by arranging Spring retainer and spring fixed hole, is effectively reduced difficulty during spring assembling.
Blood taking needle is fixed in housing by this safety type blood collecting needle construction, the blood taking needle unreasonable exposure when not using can be avoided, the fixing bar afterbody of needle bar is triggered by external force when blood taking needle uses, fixing for needle bar bar is skidded off from locating piece, and then promotion blood taking needle, or easy breach is disconnected, blood taking needle can be promoted to take a blood sample through needle outlet, this safety blood taking needle one-hand operation, and effectively ensure blood sampling operation safety.
This safety type blood collecting needle construction possesses the junction point of easy breach, bending part and bayonet unit by arranging, and disposable can complete injection molding or injection moulding, reach integrally formed. After injection moulding completes and load onto percussion spring, only need simple bending and pressing can complete the assembling of product.
Detailed description of the invention
With reference to Fig. 1��Figure 12, the present invention is a kind of safety type blood collecting needle construction, including housing 1, power set 3, is positioned at the fixing bar 2 of needle bar of housing and is fixed on the blood taking needle 8 of the fixing bar of needle bar;
Described housing 1 is provided with needle outlet 11;
The fixing locating piece being provided with the fixing bar 2 of fixing needle bar between bar 2 and housing 1 of described needle bar, or the fixing junction point possessing easy breach 12 that is provided with between bar 2 and housing 1 of described needle bar, or described needle bar fixes bar 2 and housing 1 is arranged independently of one another.
As the preferred embodiment of the present invention, described blood taking needle is the sharp object of needle-like, it would however also be possible to employ the sharp object of other shapes such as blade.
As the preferred embodiment of the present invention, described housing 1 is provided with needle outlet 11. The preferably circular through hole of needle outlet 11, it is possible to adopt the through hole of the shape such as rectangle, ellipse.
As the preferred embodiment of the present invention, power set 3 are be arranged at the fixing percussion spring 31 between bar 2 and housing 1 of needle bar.
Percussion spring 31 is preferably one, percussion power when simultaneously providing blood taking needle to fire and the reset power of the fixing bar 2 of recovery needle bar, so can play assembly performance under different conditions, after offer percussion power and maintenance blood sampling under the premise of reset function, reduce component count, reduce cost. Certain power set are provided percussion power can apply spring or other power resources respectively with reset power.
As the preferred embodiment of the present invention, described percussion spring 31 two ends are provided with and are perpendicular to spring axis, Spring retainer 32 with barb.Spring retainer 32 is preferably and is provided with " L " shape barb, and such spring keeps being connected with the fixing bar 2 of needle bar and housing 1, it is to avoid deviate from from spring fixed hole, it is ensured that can fire and guarantee percussion dynamics, guarantees to reclaim the fixing bar of needle bar simultaneously. Other shape or the mode such as certain fixed part can adopt " J " shape, expand.
The spring fixed hole 33 placing Spring retainer 32 is coordinated as the fixing bar 2 of the preferred embodiment of the present invention, described housing 1 and needle bar is respectively equipped with.
As the preferred embodiment of the present invention, housing being positioned at needle outlet 11 both sides and is provided with shutoff damper, the Breadth Maximum of the fixing masthead end of needle bar is more than the Breadth Maximum of needle outlet.
Shutoff damper is for being arranged at needle outlet 11 both sides, and be the baffle plate of level at housing 1 private side, shutoff damper is when blood taking needle is launched and taken a blood sample, after blood taking needle is launched by needle outlet 11, the front end of the fixing bar 2 of needle bar can be blocked, it is prevented that the syringe needle of blood taking needle 8 excessively exposes by shutoff damper.
The top of shutoff damper and the fixing bar 2 of needle bar can be annulus and the cylinder of the different-diameter cooperated, it is preferred to the internal diameter of needle outlet 11 is less than the external diameter of the fixing bar 2 of needle bar, and shutoff damper is at least provided with one group.
Shutoff damper is preferably one group, it is arranged on the housing 1 of needle outlet 11 periphery and the front portion of the fixing bar 2 of needle bar, any part on housing 1, the fixing bar 2 of needle bar can also be arranged on, it is also possible to be internal part and or the external components various devices limiting the fixing bar displacement of needle bars that are arranged between housing 1 and the fixing bar 2 of needle bar alone or in combination.
The setting of shutoff damper, it is possible to limit the maximum displacement of the fixing bar 2 of needle bar well, control paracentesis depth, it is prevented that syringe needle excessively exposes.
As the preferred embodiment of the present invention, needle tip is provided with the seal bar 23 of parcel needle tip.
As the preferred embodiment of the present invention, the fixing bar of needle bar extends forward the seal bar 23 being provided with parcel needle tip.
As the preferred embodiment of the present invention, the junction of needle point protection rod 23 and the fixing bar 2 of needle bar is provided with easily splits portion 24.
The setting of needle point protection rod 23 can avoid needle point to be exposed to the external world before use, rotates and comes off, can ensure sterilization effect during use. Easily splitting the setting in portion 24 can facilitate rotation to come off needle point protection rod 23, reaches needle point protection rod 23 and the fixing bar 2 of needle bar separates.
As the preferred embodiment of the present invention, the fixing bar 2 of needle bar is provided with the stopping means 21 of fixing bar 2 both sides of needle bar, is provided with in housing 1 and coordinates stopping means to make the resetting means 6 that the fixing bar 2 of needle bar resets.
Stopping means 21 can control blood taking needle 8 thorn on triggering and go out length, thus ensureing that blood taking needle 8 can rationally be taken a blood sample after stinging out, and person of blood collecting is not damaged.
Meanwhile, after blood sampling completes, resetting means 4 coordinates stopping means 21 that blood taking needle 8 can be made to return in housing 1, and avoids causing cleaning trouble, and the injury to operator and patient.
As the preferred embodiment of the present invention, resetting means 6 is be positioned at the elastic rod 61 that housing tilts to housing bottom or is parallel to housing bottom.
As the preferred embodiment of the present invention, housing 1 extends internally the elastic rod 61 being provided with to housing 1 bottom angled.
Under the form that arranges of this kind of resetting means, in the process that blood taking needle 8 stings out, elastic rod 61 is compressed, and after blood taking needle 8 stings out and puts in place and take a blood sample, elastic rod 61 replys original state under himself elastic reaction, can realize the perfect reset of blood taking needle 8.
Resetting means 6 be provided with multiple way of realization, can pass through to arrange the associate members such as spring on the fixing bar 2 of needle bar, it is possible in housing 1, arrange independent reset components to realize the reset function of blood taking needle 8.
As the preferred embodiment of the present invention, the fixing locating piece being provided with the fixing bar 2 of fixing needle bar between bar 2 and housing 1 of described needle bar.
As the preferred embodiment of the present invention, locating piece 4 is the positioning convex 41 and detent 42 that cooperate.
Locating piece 4 can be the positioning convex 41 and detent 42 that cooperate, and especially, locating piece 4 is the hemispherical protuberances cooperated and hemispherical depression. Locating piece 4 is preferably two groups, is symmetrical set. Arranging of locating piece 4 when the fixing bar 2 of needle bar is separately positioned with housing 1, can be played the fixing bar 2 of fixing needle bar, keep the effect of fixing bar 2 state before firing of needle bar.
As the preferred embodiment of the present invention, the both sides being positioned at the fixing bar of needle bar in housing are provided with resetting block, each resetting block is provided with arc groove, the both sides of the fixing bar of needle bar extend to be provided with fixes, at needle bar, the projection that can snap in arc groove when bar resets, and arc groove is provided with the breach that projection can import arc groove.
Blood taking needle 8 resets under the effect of resetting means, it is spacing that the fixing bar 2 of needle bar effectively can be carried out reset by the setting of resetting block, to prevent the fixing bar 2 of needle bar from resetting excessively, in the reseting procedure of the fixing bar 2 of needle bar, the projection of fixing bar 2 both sides of needle bar can embed in arc groove, the setting of breach can reduce the resetting block protruding stop to fixing bar 2 both sides of needle bar, to facilitate projection to slip in arc groove. The setting of resetting block also when the fixing bar 2 of needle bar is separately positioned with housing 1, can be played effect that is similar or that comprise locating piece, namely play the fixing bar 2 of fixing needle bar, keep the effect of fixing bar 2 state before firing of needle bar.
As the preferred embodiment of the present invention, needle bar is fixing is provided with the junction point possessing easy breach 12 between bar 2 and housing 1.
As the preferred embodiment of the present invention, the fixing bar 2 of described needle bar is arranged independently of one another with housing 1.
As the preferred embodiment of the present invention, the fixing bar 2 of described needle bar departs from and arranges inside housing 1 in housing 1.
As the preferred embodiment of the present invention, fixing bar 2 tail end of described needle bar extends back and is provided with trigger shaft 25. Preferably cylindrical, facilitate staff to press, break easy breach or fixing for needle bar bar released from locating piece, the spring that release is compressed, reaching the purpose of percussion.
As the preferred embodiment of the present invention, described housing 1 is provided with the through hole of corresponding trigger shaft 25.
As the preferred embodiment of the present invention, housing 1 is provided with bending mouth 15.
As the preferred embodiment of the present invention, the bottom of housing 1 is needle stand, and needle stand is provided with bending mouth 15. As preferred embodiment, bending mouth 15 is arranged in the both sides of needle stand, thus can more convenient assemble. Bending mouth 15 is at least provided with one, it is possible to be arranged on housing 1 other position.
As the preferred embodiment of the present invention, the outside being positioned at housing is provided with the fixing buckle 14 of housing. The fixing buckle 14 of housing can also be placed between housing 1 and needle stand or inside housing 1.
As the preferred embodiment of the present invention, needle stand is provided with outward extending gripper shoe 13. Gripper shoe 13 is preferably both sides and arranges, as supporting force when facilitating operator's one-handed performance.
As the preferred embodiment of the present invention, in housing, it is provided with the fixing bar motion guide rail of needle bar that the fixing bar of guiding needle bar slides.
As the preferred embodiment of the present invention, in housing, it is provided with the piggyback pod holding power set.Piggyback pod is preferably fixed bar 4 around forming by housing 1, needle bar, in non-totally-enclosed shape. The setting of piggyback pod can conveniently be installed, the spring of fixing compression, the spring of compression also can be avoided simultaneously outwards to deform and come off.
Assembly of the invention, simple in construction, assembly are few, assembling is easy, use safety. By arranging bending part and bayonet unit, disposable can complete injection molding or injection moulding, only need to put into spring, simpler bending and pressing can complete the assembling of product. Save material, reduce operation and reduce production cost, hence it is evident that alleviate medical institutions and patient's financial burden.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the premise without prejudice to spirit of the present invention, and these equivalent modification or replacement are all contained in the application claim limited range��