CN201505347U - Improved self-destruction safety injector - Google Patents
Improved self-destruction safety injector Download PDFInfo
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- CN201505347U CN201505347U CN2009202366820U CN200920236682U CN201505347U CN 201505347 U CN201505347 U CN 201505347U CN 2009202366820 U CN2009202366820 U CN 2009202366820U CN 200920236682 U CN200920236682 U CN 200920236682U CN 201505347 U CN201505347 U CN 201505347U
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- push rod
- needle stand
- syringe
- needle
- liquid
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Abstract
The utility model discloses an improved self-destruction safety injector, which comprises a needle cylinder, a push rod, a needle stand, a needle tube and a needle tube jacket, wherein the needle tub is arranged on the needle stand; the needle stand is arranged in the inner cavity of the needle cylinder; the push rod can slide in the inner cavity of the needle cylinder; the inner cavity of the push rod is provided with an automatic retraction device; the automatic retraction device comprises a retraction rod and a compression spring that is sheathed on the retraction rod; the outer wall of the front end of the retraction rod is slantingly and tightly matched with the inner wall of the front end of the push rod; the automatic retraction device is fixed at the inner cavity of the push rod in an interference fit way; the two ends of the compression spring are respectively in compression joint on the push rod and the retraction rod; the retraction rod and the needle stand are correspondingly provided with clamping parts that are in interference fit; and liquid flowing channels are arranged on the clamping parts. For the self-destruction safety injector, due to the automatic retraction device, the disposable safety automatic self-destruction can be effectively realized; in addition, as the liquid flowing channels are arranged on the automatic retraction device and the clamping parts of the needle stand, no water can be left in the needle cylinder.
Description
Technical field
This utility model relates to a kind of self-destroy safety injector.
Background technology
Syringe is a most basic a kind of medical apparatus and instruments, in order to reduce the propagation of blood borne disease in patient, make laws one after another and force to promote the use of disposable syringe in the countries in the world that comprise China, but, safety device can be reused and not have to common disposable syringe ubiquity at present, defectives such as injection back needle tubing exposes, easily utilized on the one hand by lawless person or drug addiction gentleman, on the other hand originally disposable only syringe is reused, very easily caused virus disseminating and cross infection.For preventing the phenomenon that disposable syringe is purchased, peddled, secondary uses and avoid syringe needle in the collection and treatment process, to stab medical personnel that cause medical personnel and infect, self-destroy safety injector is all adopted at research promotion in countries in the world.
Granted publication by automatic retracting device is set in pushing cylinder, makes needle stand can bounce back to pushing cylinder automatically together with syringe needle number for the Chinese patent of CN200980874Y discloses a kind of self-destroy safety injector.But before failing thoroughly to solve and use, this invention how will compress the problem that spring is compressed in the pushing cylinder bottom (pushing cylinder inner wall smooth and do not have any object and fasten, the compression snak link can not be pressed and contract), how the liquid of remainder does not lead to the problem of liquid when solving interference yet.
Publication number be US5211628A U.S. Patent Application Publication a kind of syringe with automatic retracting device, this syringe has adopted the bias piece of a spring, surround the shank of connecting rod, spring has a upper end that engages with the top end wall of push rod, also has a lower end that embeds and be locked in by bias piece in the detent recess; In addition, actuating section has a propulsive end to follow the cutting tip of connecting rod to move.Traction is terminal, and when the shaft coupling end pressurized of connecting rod breaks away from from the adjacent area, outer ring, the promotion end on the spring will follow cutting tip to move down, and traction is terminal can pull out detent recess to the lower end of spring; Moreover, bulge loop is taken to enclose before the back cavity of overcoat and the back cavity engage by laying packing ring, for the formation of packing ring provides a resistance, this resistance support bulge loop location, to prevent doing subcutaneous or intravenous injection when action puncture, move certain position of enclosing before the packing ring back cavity, has so just allowed bulge loop certain position disengaging from the syringe back cavity, so that when applying first external force, the end of tubular needle position is moved thereupon at outer casing inner wall.But, also there are some defectives in this syringe: when the position of the position of clamping mechanism minimum and needle stand maximum mutually during interference, the liquid of surplus is just sealed, can't circulate, again push ahead push rod as if intensified pressure this moment, puncture can be vibrated at the needle tubing of subcutaneous muscle, causes suffering for the patient who accepts injection.
Granted publication number also discloses a kind of self-destroy safety injector for the Chinese patent of CN2817873Y, this syringe adopts the draw point resilient mounting, and it is arranged in the outer needle stand, be assembled into needle assembly, by being threadedly connected to the injection tube top, not only have the characteristics of common draw point resilience disposable syringe again, also have advantages such as production technology is simple, easy to assembly, but it still can't solve the resistance problem of end plug, and the design of the ball-type of end plug front end also can increase liquid residue.
Though developed a large amount of self-destroy safety injectors at present, these syringes still exist various faults of construction, particularly during the syndeton interference, surplus liquid is sealed causes the residual problem of medicinal liquid not to be resolved always.For the few medicine of injection volume,, can't guarantee that then the medicine of being injected can satisfy the requirement of minimum dosage if there is the residual problem of medicinal liquid in syringe; For expensive medicine, also can cause unnecessary waste.Therefore, this utility model on the basis of existing technology, the structure of self-destroy safety injector is done further to improve, provide that a kind of no liquid is residual, sound construction and the good self-destroy safety injector of effect that bounces back automatically, to solve problems of the prior art.
The utility model content
The purpose of this utility model is to provide a kind of improved self-destroy safety injector, and its needle stand can bounce back in the syringe safely automatically together with needle tubing, and can reach the residual safe self-breaking syringe of no liquid.
This utility model is achieved through the following technical solutions:
A kind of self-destroy safety injector comprises syringe, push rod, needle stand, needle tubing and needle tubing sheath, and described needle tubing is installed on the needle stand, and needle stand is installed in syringe front end inner chamber, and push rod slides against the syringe inner chamber; The inner chamber of push rod is equipped with automatic retracting device, and this automatic retracting device comprises the retraction bar and is enclosed within the compression spring of retraction bar external diameter; The outer wall of retraction bar front end and the inwall of push rod front end are the gradient tight fit, and the bar that will bounce back to interference fit is fixed on the push rod inner chamber; The two ends of compression spring are crimped on respectively on push rod and the retraction bar; The corresponding clamping part that is provided with mutual interference fit with needle stand of retraction bar is equipped with logical liquid ditch on the clamping part, residual liquid or blood can flow into human body from the logical liquid ditch of push rod, retraction bar, needle stand.
It is oblique that the outer wall of retraction bar front end and the inwall of push rod front end can be set to all to be 1～10 ° of angle lapping to the longitudinal axis, thereby realize the close-fitting purpose of gradient each other.
Also a groove can be set on the retraction bar of automatic retracting device, security protection has O-ring seal in the groove.The sealing cushion rubber is used to seal the space between automatic retracting device and the push rod opening, prevents that liquid from leaking.
Clamping part on retraction bar and the needle stand is two or above spaced jacking block, is formed with logical liquid ditch between the jacking block; Jacking block correspondence on retraction bar and the needle stand is provided with the coupler body of interference fit each other.As alternative dispensing means, the clamping part on retraction bar and the needle stand also can adopt a ring-type jacking block that is provided with liquid-through hole, and the ring-type jacking block correspondence on retraction bar and the needle stand is provided with the coupler body of interference fit each other.Under the interference fit state of clamping part, the medicinal liquid or the blood that residue in the syringe inner chamber can flow in the needle tubing by each fluid-through chamber, finally are injected in the human body.
Needle stand is provided with first step, second step and the 3rd step, and described clamping part is arranged on the 3rd step; The vertical tube of first step and syringe hole is slidingly matched, and is provided with outer hook platform between second step and the 3rd step; The medial wall of needle stand also is provided with boss, as the spacing of needle tubing is installed.
The rear end of push rod inner chamber is provided with coniform convex body; The center, rear end of retraction bar is provided with perforate, is interference fit with described coniform convex body.When the retraction bar bounced back to the push rod rear portion, coniform convex body promptly can be connected in the perforate of retraction rod rear end, and the retraction bar is fixed in the inner chamber at push rod rear portion.
As a kind of possibility, the top of push rod is provided with two or above spaced jacking block, is formed with logical liquid ditch between the jacking block.As alternative dispensing means, the top of push rod also can be provided with a ring-type jacking block that has liquid-through hole.
Be provided with anti-liquid circle in the syringe, anti-liquid snare is connected on needle stand the 3rd step external diameter, and needle stand is fixed on the syringe inner chamber.Leave a cavity between the front surface of anti-liquid circle and the antetheca of syringe inner chamber, break away from the space of needle stand as anti-liquid circle to front slide.Anti-liquid circle also is used to seal the space between needle stand and the syringe inwall, prevents that liquid from leaking.
Also be provided with protruding balk ring on the front inner wall of syringe, this protruding balk ring is positioned at the rear end of the anti-liquid circle of syringe.
Self-destroy safety injector described in the utility model by the gradient tight fit effect between the outer wall of the inwall of push rod front end and the bar front end that bounces back, is fixed on automatic retracting device the front end of push rod inner chamber.During injection, along with push rod is pushed ahead, the anti-liquid circle that the jacking block on the push rod promotes in the syringe makes it break away from needle stand to front slide, and bounce back simultaneously bar and needle stand are connected together by clamping part; After injection finishes, under thrust, needle stand produces a counteracting force to the retraction bar, make the retraction bar slide backward the disengaging push rod, this moment, spring discharged elastic force, at this moment the bar that bounces back bounces back to the push rod inner chamber together with needle stand and needle tubing, and is connected on the coniform convex body of push rod intracavity posterior end, thereby realizes the automatic self-destruction of disposable safe of syringe.This utility model is provided with the friction tight structure of gradient, two parts that are connected inside and outside making are in the lock-out state of interference fit on a certain direction, when being subjected to rightabout active force, then can lose the tight fit effect, two parts that originally lock together are separated, realized automatic retraction under the effect of spring easily, finger is scratched by syringe needle and causes the infectiousness cross infection when preventing nurse's liquid medicine injection.
The anti-liquid that is arranged in the syringe is enclosing dual function, promptly needle stand is fixed in the syringe, and injection is sealed in the syringe, in order to avoid outflow by the space between needle stand and syringe.Because clamping part on retraction bar and the needle stand and the jacking block on the push rod are equipped with logical liquid ditch, when push rod pushes forward when making anti-liquid circle be pushed up to the place ahead, under the state of retraction bar and needle stand interference clamping automatically, the liquid or the blood that remain in the syringe still can flow into the logical liquid ditch of retraction bar from the logical liquid ditch of push rod front end, then flow in the logical liquid ditch and needle tubing of needle stand, continue to flow into human body then, thereby realize that no liquid is residual in the syringe.
Moreover, because being provided with, needle stand is used to prevent that the outer hook platform that needle stand retreats and the inwall of syringe are provided with protruding balk ring, and both form double-deck force structure, and needle stand is stressed in the time of can preventing to inject effectively is reversed.And the first step that is slidingly matched with the vertical tube of syringe hole is set on needle stand, deflection takes place when needle tubing is injected in the time of preventing to inject again.
Description of drawings
Fig. 1 is the structural representation of embodiment one described syringe;
The structural representation that Fig. 2 is embodiment one a described syringe when needle stand and needle tubing retract in the push rod;
Fig. 3 is the structural representation of embodiment one described needle stand;
Fig. 3 a is the upward view of Fig. 3;
Fig. 4 is the structural representation of embodiment one described retraction bar;
Fig. 4 a is the vertical view of Fig. 4;
Fig. 5 is the structural representation of embodiment one described push rod;
Fig. 6 is the structural representation of embodiment two described syringes;
The structural representation that Fig. 7 is embodiment two described syringes when needle stand and needle tubing retract in the push rod;
Fig. 8 is the structural representation of embodiment two described needle stands;
Fig. 8 a is the upward view of Fig. 8;
Fig. 9 is the structural representation of embodiment two described retraction bars;
Fig. 9 a is the vertical view of Fig. 9;
Figure 10 is the structural representation of embodiment two described push rods;
Figure 10 a is the vertical view of Figure 10;
Figure 11 is the structural representation of embodiment three described needle stands;
Figure 11 a is the upward view of Figure 11;
Figure 12 is the structural representation of embodiment three described retraction bars;
Figure 12 a is the vertical view of Figure 12;
Figure 13 is the structural representation of embodiment three described push rods;
Figure 14 is the structural representation of embodiment four described needle stands;
Figure 14 a is the upward view of Figure 14;
Figure 15 is the structural representation of embodiment four described retraction bars;
Figure 15 a is the vertical view of Figure 15;
Figure 16 is the structural representation of embodiment four described push rods;
Figure 16 a is the vertical view of Figure 16.
The specific embodiment
Embodiment one:
Extremely shown in Figure 5 as Fig. 1, self-destroy safety injector described in the utility model, comprise syringe 1, push rod 2, needle stand 3, needle tubing 4 and needle tubing sheath 41, needle tubing 4 is installed on the needle stand 3, needle stand 3 and push rod 2 are installed in the syringe 1, the front end of push rod 2 is with piston 5, and piston 5 is slidingly matched with the inwall of syringe 1.
The inwall A of push rod 2 front ends is 3 ° of angle lappings tiltedly (θ angle as shown in Figure 5) to y direction, and its rear end is provided with the coniform convex body 21 that stretches to inner chamber.The inner chamber of push rod 2 is equipped with automatic retracting device 6, and automatic retracting device 6 comprises retraction bar 61, spring 62 and O-ring seal 63.The front end of retraction bar 61 is provided with groove 611, and the rear end is provided with boss 612; O-ring seal 63 is placed in the groove 611, between the outer wall of the bar 61 that is used to prevent to bounce back and the inwall of push rod 2 leak of liquid takes place; Spring 62 wedging rings are connected on retraction bar 61 external diameters, and its front end is crimped on the front end of push rod 2 inner chambers, and its rear end is crimped on the boss 612 of retraction bar 61.The outer wall B of retraction bar 61 front ends is 3 ° of angle lappings tiltedly (θ angle as shown in Figure 4) to y direction, is the gradient tight fit with the inwall A of push rod 2 front ends, thereby automatic retracting device 6 is fixed on the front end of push rod 2 inner chambers.The top of retraction bar 61 is made of four jacking blocks of along the circumferential direction equidistantly arranging 613, and coupler body 614 in also being provided with on the jacking block 613 leaves logical liquid ditch 615 between the adjacent jacking block 613.Jacking block 613 stretches out in outside push rod 2 front end faces.The rear end of retraction bar 61 is provided with perforate, and this perforate is interference fit with the coniform convex body 21 of being located at push rod 2 rear ends.Retraction bar 61 also is provided with limited step 616 at the rear side of groove 611, and the bar 61 that prevents to bounce back excessively cooperates with push rod 2 and can't realize automatic retraction function.
The front end of syringe 1 inner chamber is equipped with anti-liquid circle 7, also is provided with protruding balk ring 9 on the inwall.Anti-liquid circle 7 is a flexible rubber ring, is placed in the 3rd step 33 external diameters of needle stand 3, and the outer hook platform 34 of its front end face and needle stand 3 is tangent, and rear end face and protruding balk ring 9 are tangent, thereby needle stand 3 are fixed on the front end of syringe 1 inner chamber.Protruding balk ring 9 is double-deck stressed with hook platform 34, needle stand 3 stressed being reversed in the time of can effectively preventing to inject.At the inner chamber of syringe 1, form a cavity 8 between the front end face of anti-liquid circle 7 and the inwall of syringe 1, break away from the space of needle stand 3 as anti-liquid circle 7 to front slide.Anti-liquid circle 7 also is used to seal the space between needle stand 3 and syringe 1 inwall, prevents that liquid from leaking thus.
During injection, along with push rod 2 is pushed ahead, the liquid in the syringe 1 flows in the needle tubing 4 by the inner chamber of needle stand 3, injects in human body or the animal body through needle tubing 4.When push rod 2 is pulled to the front end of syringe 1, the jacking block 613 on the retraction bar 61 contact with anti-liquid circle 7, and further promotes to prevent three step 33 of liquid circle 7 to front slide disengaging needle stand 3, enters in the cavity 8.Simultaneously, outer coupler body 332 clamping mutually on the interior coupler body 614 on the jacking block 613 and the jacking block 331, thus needle stand 3 and retraction bar 61 are linked together.In the present embodiment, constitute because clamping part is a jacking block by four buckle bodies of equidistantly arranging, the resistance during clamping is divided into the quartering, therefore when promoting push rod and carry out clamping, does not have the resistance sensation substantially.In addition, owing to leave logical liquid ditch between the jacking block of retraction bar 61 and needle stand 3, after retraction bar 61 and needle stand 3 clampings, remain in the logical liquid ditch 333 that syringe 1 interior liquid still can flow into needle stands 3 by the logical liquid ditch 615 of retraction bar 61, enter again in the needle tubing 4 and flow into human body, thereby can realize that no liquid is residual in the syringe 1.After injection finishes, under the push rod thrust, retraction bar 61 is continued to push forward, make the rear end face C of needle stand 3 be depressed into the front end face D of retraction bar 61, and borrow propelling inertia to produce a counteracting force, force retraction bar 61 to slide backward, the gradient of bar 61 outer walls and push rod 2 inwalls of bouncing back this moment loses the tight fit effect, then spring 62 discharges elastic force, promoting retraction bar 61 retracts in the inner chamber of push rod 2 together with needle stand 3 and needle tubing 4, and by the retraction rod rear end perforate hang on the coniform convex body 21 of push rod 2 rear ends, thereby make retraction bar 61, needle stand 3 and needle tubing 4 are fixed in the push rod inner chamber, realize the automatic self-destruction of disposable safe, can realize that the no medicinal liquid of expensive medicinal liquid or micro-injection liquid is residual on the one hand, also prevented cross infection on the other hand.
Embodiment two:
Extremely shown in Figure 10 as Fig. 6, self-destroy safety injector described in the utility model, comprise syringe 1, push rod 2, needle stand 3, needle tubing 4 and needle tubing sheath 41, needle tubing 4 is installed on the needle stand 3, needle stand 3 and push rod 2 are installed in the syringe 1, the front end of push rod 2 is with piston 5, and piston 5 is slidingly matched with the inwall of syringe 1.
The inwall A of push rod 2 front ends is 3 ° of angle lappings tiltedly (θ angle as shown in figure 10) to y direction, and its rear end is provided with coniform convex body 21.Also be provided with four jacking blocks of along the circumferential direction equidistantly arranging 22 on the top of push rod 2, leave logical liquid ditch 23 between the adjacent jacking block 22.The inner chamber of push rod 2 is equipped with automatic retracting device 6, and automatic retracting device 6 comprises retraction bar 61, spring 62 and O-ring seal 63.The front end of retraction bar 61 is provided with groove 611, and the rear end is provided with boss 612; O-ring seal 63 is placed in the groove 611, between the outer wall of the bar 61 that is used to prevent to bounce back and the inwall of push rod 2 leak of liquid takes place; Spring 62 wedging rings are connected on retraction bar 61 external diameters, and its front end is crimped on the front end of push rod 2, and its rear end is crimped on the boss 612 of retraction bar 61.The outer wall B of retraction bar 61 front ends is 3 ° of angle lappings tiltedly (θ angle as shown in Figure 9) to y direction, be the gradient tight fit with the inwall A of push rod 2 front ends, thereby the bar 61 that will bounce back automatically is fixed on the front end of push rod 2 inner chambers.The top of retraction bar 61 along the circumferential direction equidistantly constitutes every the hemispherical jacking block of arranging 613 ' by four, also is provided with outer coupler body 614 ' on the hemispherical jacking block 613 ', leaves logical liquid ditch 615 ' between the adjacent hemispherical jacking block 613 '.Hemispherical jacking block 613 ' stretches out in outside push rod 2 front end faces, is positioned at jacking block 22 inboards and is in same baseplane.The rear end of retraction bar 61 is provided with perforate, and this perforate is interference fit with the coniform convex body 21 of being located at push rod 2 rear ends.Retraction bar 61 also is provided with limited step 616 at the rear side of groove 611, and the bar 61 that prevents to bounce back excessively cooperates with push rod 2 and can't realize automatic retraction function.
The front end of syringe 1 inner chamber is equipped with anti-liquid circle 7, also is provided with protruding balk ring 9 on the inwall.Anti-liquid circle 7 is a flexible rubber ring, is placed in outside the 3rd step 33 of needle stand 3, and the hook platform 34 of its front end face and needle stand 3 is tangent, and rear end face and protruding balk ring 9 are tangent, thereby needle stand 3 are fixed on the front end of syringe 1 inner chamber.Protruding balk ring 9 is double-deck stressed with hook platform 34, needle stand 3 stressed being reversed in the time of can effectively preventing to inject.At the inner chamber of syringe 1, form a cavity 8 between the front end face of anti-liquid circle 7 and the inwall of syringe 1, break away from the space of needle stand 3 to front slide as anti-liquid circle 7.Anti-liquid circle 7 also is used to seal the space between needle stand 3 and syringe 1 inwall, prevents that liquid from leaking.
During injection, along with push rod 2 is pushed ahead, the liquid in the syringe 1 flows in the needle tubing 4 by the inner chamber of needle stand 3, injects in human body or the animal body through needle tubing 4.When push rod 2 is pulled to the front end of syringe 1, the jacking block 22 on the push rod 2 contacts with anti-liquid circle 7, and further promotes anti-liquid circle 7 and break away from the 3rd step 33 of needle stand 3 to front slide, enters in the cavity 8.Simultaneously, jacking block 331 matches with hemispherical jacking block 613 ', encircles the outer coupler body 614 ' clamping mutually on interior coupler body 332 ' and the hemispherical jacking block 613 ' on the fan-shaped jacking block 331, thereby needle stand 3 and retraction bar 61 are linked together.In the present embodiment, constitute because clamping part is a jacking block by four buckle bodies of equidistantly arranging, the resistance during clamping is divided into the quartering, therefore when promoting push rod and carry out clamping, does not have the resistance sensation substantially.In addition, owing to leave logical liquid ditch between the jacking block of push rod 2, retraction bar 61 and needle stand 3, after retraction bar 61 and needle stand 3 clampings, remain in the logical liquid ditch 333 that syringe 1 interior liquid still can flow into needle stand 3 by the logical liquid ditch 615 ' of retraction bar 61, enter again in the needle tubing 4 and flow into human body, thereby realize in the syringe 1 that no liquid is residual.After injection finishes, under the push rod thrust, retraction bar 61 is continued to push forward, make the rear end face C of needle stand 3 be depressed into the front end face D of retraction bar 61, and borrow propelling inertia to produce a counteracting force, force retraction bar 61 to slide backward, the gradient of bar 61 outer walls and push rod 2 inwalls of bouncing back this moment loses the tight fit effect, then spring 62 discharges elastic force, promoting retraction bar 61 retracts in the inner chamber of push rod 2 together with needle stand 3 and needle tubing 4, and hang on the coniform convex body 21 of push rod 2 rear ends, thereby realize the automatic self-destruction of disposable safe by the perforate on the rear end.
Embodiment three:
Shown in Fig. 1, Fig. 2 and Figure 11 to 13, self-destroy safety injector described in the utility model, comprise syringe 1, push rod 2, needle stand 3, needle tubing 4 and needle tubing sheath 41, needle tubing 4 is installed on the needle stand 3, needle stand 3 and push rod 2 are installed in the syringe 1, the front end of push rod 2 is with piston 5, and piston 5 is slidingly matched with the inwall of syringe 1.
The inwall A of push rod 2 front ends is 4 ° of angle lappings tiltedly (θ angle as shown in figure 13) to y direction, and its rear end is provided with coniform convex body 21.The inner chamber of push rod 2 is equipped with automatic retracting device 6, and automatic retracting device 6 comprises retraction bar 61, spring 62 and O-ring seal 63.The front end of retraction bar 61 is provided with groove 611, and the rear end is provided with boss 612; O-ring seal 63 is placed in the groove 611, between the outer wall of the bar 61 that is used to prevent to bounce back and the inwall of push rod 2 leak of liquid takes place; Spring 62 wedging rings are connected on retraction bar 61 external diameters, and its front end is crimped on the front end of push rod 2, and its rear end is crimped on the boss 612 of retraction bar 61.The outer wall B of retraction bar 61 front ends is 4 ° of angle lappings tiltedly (θ angle as shown in figure 12) to y direction, is the gradient tight fit with the inwall A of push rod 2 front ends, thereby automatic retracting device 6 is fixed on the front end of push rod 2 inner chambers.The top of retraction bar 61 is by an annular jacking block 613 " constitute annular jacking block 613 " on also be provided with in coupler body 614 and spaced liquid-through hole 618.Annular jacking block 613 " stretch out in outside push rod 2 front end faces.The rear end of retraction bar 61 is provided with perforate, and this perforate is interference fit with the coniform convex body 21 of being located at push rod 2 rear ends.Retraction bar 61 also is provided with limited step 616 at the rear side of groove 611, and the bar 61 that prevents to bounce back excessively cooperates with push rod 2 and can't realize automatic retraction function.
The front end of syringe 1 inner chamber is equipped with anti-liquid circle 7, also is provided with protruding balk ring 9 on the inwall.Anti-liquid circle 7 is a flexible rubber ring, is placed in outside the 3rd step 33 of needle stand 3, and the hook platform 34 of its front end face and needle stand 3 is tangent, and rear end face and protruding balk ring 9 are tangent, thereby needle stand 3 are fixed on the front end of syringe 1 inner chamber.Protruding balk ring 9 is double-deck stressed with hook platform 34, needle stand 3 stressed being reversed in the time of can effectively preventing to inject.At the inner chamber of syringe 1, form a cavity 8 between the front end face of anti-liquid circle 7 and the inwall of syringe 1, break away from the space of needle stand 3 to front slide as anti-liquid circle 7.Anti-liquid circle 7 also is used to seal the space between needle stand 3 and syringe 1 inwall, prevents that liquid from leaking.
During injection, along with push rod 2 is pushed ahead, the liquid in the syringe 1 flows in the needle tubing 4 by the inner chamber of needle stand 3, injects in human body or the animal body through needle tubing 4.When push rod 2 is pulled to the front end of syringe 1, the annular jacking block 613 on the retraction bar 61 " contact with anti-liquid circle 7, and further promote to prevent three step 33 of liquid circle 7 to front slide disengaging needle stand 3, enter in the cavity 8.Simultaneously, annular jacking block 613 " on interior coupler body 614 and annular jacking block 331 ' on outer coupler body 332 clamping mutually, thereby needle stand 3 and retraction bar 61 are linked together.In the present embodiment, owing to be provided with liquid-through hole in the jacking block of retraction bar 61 and needle stand 3, after retraction bar 61 and needle stand 3 clampings, remain in the liquid-through hole 334 that syringe 1 interior liquid still can flow into needle stands 3 by the liquid-through hole 618 of retraction bar 61, enter again in the needle tubing 4 and flow into human body, thereby can realize that no liquid is residual in the syringe 1.After injection finishes, under the push rod thrust, retraction bar 61 is continued to push forward, make the rear end face C of needle stand 3 be depressed into the front end face D of retraction bar 61, and borrow propelling inertia to produce a counteracting force, force retraction bar 61 to slide backward, the gradient of bar 61 outer walls and push rod 2 inwalls of bouncing back this moment loses the tight fit effect, then spring 62 discharges elastic force, promoting retraction bar 61 retracts in the inner chamber of push rod 2 together with needle stand 3 and needle tubing 4, and hang on the coniform convex body 21 of push rod 2 rear ends, thereby realize the automatic self-destruction of disposable safe by the perforate on the rear end.
Embodiment four:
Shown in Fig. 6, Fig. 7 and Figure 14 to 16, self-destroy safety injector described in the utility model, comprise syringe 1, push rod 2, retraction bar 61, needle stand 3, needle tubing 4 and needle tubing sheath 41, needle tubing 4 is installed on the needle stand 3, needle stand 3 and push rod 2 are installed in the syringe 1, the front end of push rod 2 is with piston 5, and piston 5 is slidingly matched with the inwall of syringe 1.
The inwall A of push rod 2 front ends is 2 ° of angle lappings tiltedly (θ angle as shown in figure 15) to y direction, and its rear end is provided with coniform convex body 21, also is provided with an annular jacking block 22 ' on the top of push rod 2, also is provided with spaced liquid-through hole 24 on the annular jacking block 22 '.The inner chamber of push rod 2 is equipped with automatic retracting device 6, and automatic retracting device 6 comprises retraction bar 61, spring 62 and O-ring seal 63.The front end of retraction bar 61 is provided with groove 611, and the rear end is provided with boss 612; O-ring seal 63 is placed in the groove 611, between the outer wall of the bar 61 that is used to prevent to bounce back and the inwall of push rod 2 leak of liquid takes place; Spring 62 wedging rings are connected on outside the retraction bar 61, and its front end is crimped on the front end of push rod 2, and its rear end is crimped on the boss 612 of retraction bar 61.The outer wall B of retraction bar 61 front ends is 2 ° of angle lappings tiltedly (θ angle as shown in figure 16) to y direction, is the gradient tight fit with the inwall A of push rod 2 front ends, thereby automatic retracting device 6 is fixed on the front end of push rod 2 inner chambers.The top of retraction bar 61 is made of four hemispherical jacking blocks of along the circumferential direction equidistantly arranging 613 ', also is provided with outer coupler body 614 ' on the hemispherical jacking block 613 ', forms logical liquid ditch 615 ' between the adjacent hemispherical jacking block 613 '.Hemispherical jacking block 613 ' stretches out in outside push rod 2 front end faces, is positioned at jacking block 22 ' inboard, and is in same baseplane.The rear end of retraction bar 61 is provided with perforate, and this perforate is interference fit with the coniform convex body 21 of being located at push rod 2 rear ends.Retraction bar 61 also is provided with limited step 616 at the rear side of groove 611, and the bar 61 that prevents to bounce back excessively cooperates with push rod 2 and can't realize automatic retraction function.
The front end of syringe 1 inner chamber is equipped with anti-liquid circle 7, also is provided with protruding balk ring 9 on the inwall.Anti-liquid circle 7 is a flexible rubber ring, is placed in outside the 3rd step 33 of needle stand 3, and the hook platform 34 of its front end face and needle stand 3 is tangent, and rear end face and protruding balk ring 9 are tangent, thereby needle stand 3 are fixed on the front end of syringe 1 inner chamber.Protruding balk ring 9 is double-deck stressed with hook platform 34, needle stand 3 stressed being reversed in the time of can effectively preventing to inject.At the inner chamber of syringe 1, form a cavity 8 between the front end face of anti-liquid circle 7 and syringe 1 inwall, break away from the space of needle stand 3 to front slide as anti-liquid circle 7.Anti-liquid circle 7 also is used to seal the space between needle stand 3 and syringe 1 inwall, prevents that liquid from leaking.
During injection, along with push rod 2 is pushed ahead, the liquid in the syringe 1 flows in the needle tubing 4 by the inner chamber of needle stand 3, injects in human body or the animal body through needle tubing 4.When push rod 2 is pulled to the front end of syringe 1, the annular jacking block 22 ' on the push rod 2 is tangent with anti-liquid circle 7, and further promotes anti-liquid circle 7 and break away from the 3rd step 33 of needle stand 3 to front slide, enters in the cavity 8.Simultaneously, annular jacking block 331 ' matches with hemispherical jacking block 613 ', the outer coupler body 614 ' clamping mutually on the interior coupler body 332 ' on the annular jacking block 331 ' and the hemispherical jacking block 613 ', thus needle stand 3 and retraction bar 61 are linked together.In the present embodiment, because push rod 2, retraction bar 61 are provided with liquid-through hole 334 or logical liquid ditch 615 ' with the jacking block of needle stand 3, after retraction bar 61 and needle stand 3 clampings, the liquid-through hole 334 that remains in logical liquid ditch 615 ' that liquid in the syringe 1 still can be by retraction bar 61 and needle stand flows in the inner chamber of needle stands 3 and the needle tubing 4 and flows into human body, thereby syringe 1 interior no liquid is residual.After injection finishes, under the push rod thrust, retraction bar 61 is continued to push forward, make the rear end face C of needle stand 3 be depressed into the front end face D of retraction bar 61, and borrow propelling inertia to produce a counteracting force, force retraction bar 61 to slide backward, the gradient of bar 61 outer walls and push rod 2 inwalls of bouncing back this moment loses the tight fit effect, then spring 62 discharges elastic force, promoting retraction bar 61 retracts in the inner chamber of push rod 2 together with needle stand 3 and needle tubing 4, and be connected to by the perforate interference on the rear end on the coniform convex body 21 of push rod 2 rear ends, thereby realize the automatic self-destruction of disposable safe.
This utility model includes, but are not limited to the content of the foregoing description, other all fall within the protection domain of the present utility model with product structure that the technical solution of the utility model has identical essentiality content.
Claims (10)
1. self-destroy safety injector, comprise syringe, push rod, needle stand, needle tubing and needle tubing sheath, needle tubing is installed on the needle stand, needle stand is installed in the syringe inner chamber, push rod slides against the syringe inner chamber, it is characterized in that: the inner chamber of described push rod is equipped with automatic retracting device, and described automatic retracting device comprises the retraction bar and is enclosed within the compression spring of retraction on the bar; The outer wall of described retraction bar front end and the inwall of described push rod front end are the gradient tight fit, and the bar that will bounce back to interference fit is fixed on the push rod inner chamber; The two ends of described compression spring are crimped on respectively on described push rod and the retraction bar; The corresponding clamping part that is provided with mutual interference fit with needle stand of described retraction bar is equipped with logical liquid ditch on the clamping part.
2. self-destroy safety injector according to claim 1 is characterized in that: it is oblique that the outer wall of described retraction bar front end and the inwall of push rod front end all are 1～10 ° of angle lapping to the longitudinal axis, and closely cooperate by inclination each other.
3. self-destroy safety injector according to claim 1 is characterized in that: the clamping part on described retraction bar and the needle stand is two or above spaced jacking block, is formed with logical liquid ditch between the jacking block; Jacking block correspondence on retraction bar and the needle stand is provided with the coupler body of interference fit each other.
4. self-destroy safety injector according to claim 1 is characterized in that: the clamping part on described retraction bar and the needle stand is a ring-type jacking block that is provided with liquid-through hole, and the ring-type jacking block correspondence on retraction bar and the needle stand is provided with the coupler body of interference fit each other.
5. self-destroy safety injector according to claim 1 is characterized in that: described needle stand is provided with first step, second step and the 3rd step, and described clamping part is arranged on the 3rd step; The vertical tube of first step and syringe hole is slidingly matched, and is provided with outer hook platform between second step and the 3rd step; The medial wall of described needle stand also is provided with boss.
6. self-destroy safety injector according to claim 1 is characterized in that: the rear end of described push rod is provided with coniform convex body; The rear end of described retraction bar is provided with perforate, is interference fit with described coniform convex body.
7. self-destroy safety injector according to claim 1 is characterized in that: the top of described push rod is provided with two or above spaced jacking block, is formed with logical liquid ditch between the jacking block.
8. self-destroy safety injector according to claim 1 is characterized in that: the top of described push rod is provided with a ring-type jacking block that has liquid-through hole.
9. self-destroy safety injector according to claim 1 is characterized in that: be provided with anti-liquid circle in the described syringe, anti-liquid snare is connected on outside the needle stand, and needle stand is fixed on the syringe inner chamber; Leave a cavity between the front surface of anti-liquid circle and the antetheca of syringe inner chamber.
10. self-destroy safety injector according to claim 9 is characterized in that: the inwall of described syringe is provided with protruding balk ring, and described protruding balk ring is positioned at the rear end of described anti-liquid circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202366820U CN201505347U (en) | 2009-09-30 | 2009-09-30 | Improved self-destruction safety injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202366820U CN201505347U (en) | 2009-09-30 | 2009-09-30 | Improved self-destruction safety injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201505347U true CN201505347U (en) | 2010-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202366820U Expired - Lifetime CN201505347U (en) | 2009-09-30 | 2009-09-30 | Improved self-destruction safety injector |
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| Country | Link |
|---|---|
| CN (1) | CN201505347U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102599918A (en) * | 2012-03-25 | 2012-07-25 | 汕头华尔怡医疗器械有限公司 | Safe blood sampling needle |
| CN104027874A (en) * | 2014-06-19 | 2014-09-10 | 杨育和 | Retractable type safe injection syringe with changeable needle |
| CN108014397A (en) * | 2017-12-07 | 2018-05-11 | 汕头华尔怡医疗器械有限公司 | Syringe |
| CN109701115A (en) * | 2018-11-30 | 2019-05-03 | 衡刚 | A kind of automatic self-destruction syringe |
| CN112999468A (en) * | 2021-02-09 | 2021-06-22 | 上海康德莱医疗器械股份有限公司 | Safety syringe |
| WO2022041524A1 (en) * | 2020-08-27 | 2022-03-03 | 汕头华尔怡医疗器械有限公司 | Syringe barrel structure and syringe having same |
-
2009
- 2009-09-30 CN CN2009202366820U patent/CN201505347U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102599918A (en) * | 2012-03-25 | 2012-07-25 | 汕头华尔怡医疗器械有限公司 | Safe blood sampling needle |
| CN102599918B (en) * | 2012-03-25 | 2015-02-04 | 汕头华尔怡医疗器械有限公司 | Safe blood sampling needle |
| CN104027874A (en) * | 2014-06-19 | 2014-09-10 | 杨育和 | Retractable type safe injection syringe with changeable needle |
| WO2015192485A1 (en) * | 2014-06-19 | 2015-12-23 | 杨育和 | Retractable safe syringe with changeable needle |
| CN108014397A (en) * | 2017-12-07 | 2018-05-11 | 汕头华尔怡医疗器械有限公司 | Syringe |
| WO2019109814A1 (en) * | 2017-12-07 | 2019-06-13 | 杨德怡 | Syringe |
| CN108014397B (en) * | 2017-12-07 | 2019-08-30 | 杨德怡 | Syringe |
| CN109701115A (en) * | 2018-11-30 | 2019-05-03 | 衡刚 | A kind of automatic self-destruction syringe |
| WO2022041524A1 (en) * | 2020-08-27 | 2022-03-03 | 汕头华尔怡医疗器械有限公司 | Syringe barrel structure and syringe having same |
| CN112999468A (en) * | 2021-02-09 | 2021-06-22 | 上海康德莱医疗器械股份有限公司 | Safety syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUAERYI MEDICAL EQUIPMENT CO., LTD., SHANTOU Free format text: FORMER OWNER: YANG YUHE Effective date: 20111024 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 515000 SHANTOU, GUANGDONG PROVINCE TO: 515064 SHANTOU, GUANGDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20111024 Address after: 515064 Guangdong Shantou Golden Ring Road (Qishan High School Road) Patentee after: Shantou Wealy Medical Instrument Co., Ltd. Address before: 515000 Guangdong City, Shantou province Shantou Ring Road north Yi Medical Equipment Co., Ltd. Patentee before: Yang Yuhe |
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| CX01 | Expiry of patent term |
Granted publication date: 20100616 |
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| CX01 | Expiry of patent term |