TW201330894A - Single use syringe with locking needle safety cover - Google Patents

Abstract

The invention relates to a single use syringe with a locking needle safety cover. The single use syringe includes a piston arm, a piston end, a syringe body, a fixation sleeve, and the locking needle safety cover, in which the piston end is engaged to the piston arm by at least one protruded tip. A sleeve rib located on the fixation sleeve is locked on the syringe body when a user pulls the piston arm back, to limit the fixation sleeve not to be forwardly moved again. If the user performs a push-press action on the piston arm, the protruded tip is disengaged from the fixation sleeve to separate the piston arm from the piston end. After that, the piston arm and the piston end cannot be engaged with each other again. Besides, when the user rotates the locking needle safety cover, an injection needle of the syringe is engaged in the locking needle safety cover. Accordingly, the purpose of unable to repeatedly use the single use syringe with the locking needle safety cover can be attained.

Description

Disposable syringe with locking needle safety cover

The present invention relates to a medical syringe, and more particularly to a disposable syringe having a locking needle safety cover that is both safe and efficient to ensure that it cannot be reused.

A syringe is a fairly common medical product that injects a drug into a patient to achieve a medical treatment. In general, a medical professional first introduces the drug into the syringe and then injects the drug into the patient through a needle on the syringe.

There are many potential risk factors for conventional syringes in terms of actual use. When used improperly, it will cause very serious damage and adverse effects on the patient's health.

Among them, a major problem is that the conventional syringe is extremely easy to have a problem of repeated use because the conventional syringe is structurally incapable of being reused, so that the syringe can be easily reused by a person of interest.

For example, when a syringe injects a drug into a patient, the patient's blood, residual medication, virus, bacteria, or other contaminant. It may be left on the syringe or its needle. When the same syringe is used again on the second patient, the second patient may be infected with the pathogen of the previous patient.

If the first patient is infected with a virus, the second patient will probably be infected with the same virus because they share the syringe with the first patient. Alternatively, the second patient may also have an allergy response to the medication used by the first patient.

Furthermore, if the appearance of the syringe is simple, it is difficult for medical personnel to judge whether it is already a used syringe.

Therefore, in view of the above, it is one of the problems that is well known to those skilled in the art to provide a syringe that is both safe and effective and that can not be used twice.

In order to solve the problems of the prior art, the main object of the present invention is to provide a safety disposable syringe with a locking needle safety cover that can automatically lock and automatically cut off its internal components after injection, thereby effectively Avoid using the syringe repeatedly.

The disposable syringe with the locking needle safety cover disclosed in the present invention comprises: a piston arm, a piston end, a syringe body, a fixing sleeve, and a locking needle safety cover.

According to an embodiment of the invention, the locking needle safety cover is disposed outside the syringe body and has a retractable safety cover. Prior to use of the syringe, the locking needle safety cover is placed around the injection needle of one of the syringes to prevent the user or medical personnel from accidentally touching the injection needle. When the syringe is being used, the user can expose the injection needle by pulling back the locking needle safety cover to slide along the outer surface of the syringe body. In this case, the locking needle safety cover is retracted, while at the same time allowing the injection needle to protrude from the front opening of the safety cover of the locking needle safety cover for injection into the patient. After the syringe is used, the user can again return the locking needle safety cover to its original position to cover the needle again to prevent the needle from being accidentally touched by the medical personnel after the injection has been completed.

The user can then rotate the locking needle safety cover. When the locking needle safety cover is rotated, the injection needle is in contact with one of the needle engagement portions of the needle lock and then gradually folded toward the inside of the safety cover body. When the injection needle contacts the bottom end of the needle engagement portion, the injection needle is bent into the needle engagement portion, in which case the injection needle that has completed the injection is engaged in the needle engagement portion. It should be noted that the locking needle safety cover disclosed in the embodiment of the present invention cannot be re-retracted once the needle is engaged into the needle engaging portion.

According to an embodiment of the present invention, the piston arm may further include a rod member that is insertable into an accommodating space in the base of the piston end. The fixed sleeve is wrapped around the protruding tip disposed at the end of the piston, whereby the retaining sleeve allows the protruding tip to engage the piston arm.

According to an embodiment of the present invention, when the user pulls back the piston arm of the syringe, the sleeve rib on the fixing sleeve will be caught in the syringe body, whereby the movement of the fixing sleeve will be restricted, and Can't push forward again.

If the user begins to push the piston arm of the syringe forward, the protruding tip will begin to disengage from the sleeve of the fixed sleeve such that the protruding tip thus begins to separate from the piston arm. After the protruding tip and the piston arm are no longer engaged, the user can still push the piston end forward by pushing the rod of the piston arm until the piston end abuts against the front end of the syringe body. However, in accordance with an embodiment of the present invention, once the piston end is disengaged from the piston arm, the two will not be able to engage again. Also, the piston end cannot be pulled back again. Therefore, the disposable syringe with the locking needle safety cover proposed by the present invention achieves the purpose of avoiding repeated use of the syringe.

The piston arm disclosed in the present invention can form a positioning system together with the syringe body, mainly for fixing the position of the piston arm in the syringe and preventing the displacement of the piston arm during the transportation of the syringe. When the syringe is delivered to the destination and the medical personnel are ready to begin use, the medical personnel can unscrew the piston arm to unlock the positioned piston module. After that, the medical staff can smoothly pull back the piston arm to introduce the drug to be injected into the syringe.

Secondly, in accordance with an embodiment of the present invention, the piston arm may further have an indicator of use. In an embodiment, the usage indicator may include, for example, the letters "USED"; or, the indicator may be used to display a higher brightness color. When the syringe has been used, the indicator will display the words "USED" above, or show a clear chroma. Thereby, the user can determine whether the syringe has been used by interpreting the use indicator.

In summary, the disposable syringe with the locking needle safety cover proposed by the invention not only avoids repeated use of the same syringe by medical personnel, but also effectively suppresses the possibility of common needles of drug users or drug abusers.

In addition, a disposable syringe having a latching needle safety cover disclosed in accordance with the present invention can be used to reduce the risk of the user sharing medication and needles. Even if the user does not legally recycle or discard the syringe after applying the medicine, the disposable syringe with the locking needle safety cover disclosed in the present invention can effectively prevent the next user from reusing.

The purpose, technical contents, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments and the accompanying drawings.

The above description of the present invention is intended to be illustrative and illustrative of the spirit and principles of the invention, and to provide further explanation of the scope of the invention. The features, implementations, and utilities of the present invention are described in detail with reference to the preferred embodiments.

For the following description, please refer to the 1A to 1F drawings. 1A, 1B, and 1C are respectively a cross-sectional view, a side view, and a rear view of a piston arm of a disposable syringe having a locking needle safety cover according to an embodiment of the present invention. 1D is a side view of a piston arm hand-held portion of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention. 1E is a cross-sectional view of a piston arm hand-held portion of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention. 1F is a rear elevational view of the piston arm handhold of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

A single use syringe with a locking needle safety cover disclosed in the present invention mainly includes: a plunger assembly, a tip retaining sleeve, and a syringe body (syringe body) ).

The piston module described above includes a plunger arm and a plunger tip, and the piston end and the piston arm are selectively detachable or combined. In general, medical personnel mainly use the piston module to introduce the drug into the body of the syringe, after which the medical personnel can inject the drug into the patient.

As shown in FIGS. 1A to 1F, the piston arm 100 includes a plunger knob 110, a plunger stem 120, a tip flange 122, and an arm post. ) 140.

According to an embodiment of the present invention, as shown in FIG. 1D to FIG. 1F, the hand-held portion 110 further has at least one thread tip 111. The function of the thread 111 is to make the hand-held portion 110 lock. The thread 112 is attached to the handle 120. In other words, the present invention locks the hand piece 110 and the connecting handle 120 together by the two sets of threads 111, 112 disposed correspondingly to each other.

According to another embodiment of the present invention, the manner in which the hand portion 110 and the connecting handle 120 are engaged is not limited to the above-mentioned screwing. The two can of course be held by an ultrasonic welding method. The portion 110 is welded together with the connecting handle 120.

According to an embodiment of the invention, the hand portion 110 is disposed at one end of the connection handle 120. The medical staff or user can pull back the piston arm 100 by the hand portion 110 to introduce the liquid or the drug to be injected into the syringe. Similarly, the medical staff or the user can push the piston arm 100 by the hand portion 110 to push the piston module forward, and at the same time, the liquid or the drug to be injected is discharged from the syringe and injected into the patient's body. .

In another aspect, the piston arm 100 includes at least one tip flange 122 and a rod member 140, and the tip flange 122 and the rod member 140 are disposed at the other end of the coupling handle 120. In accordance with an embodiment of the present invention, the tip flange 122 and the rod member 140 are primarily intended to hold and position the piston end in the piston module.

As shown in FIG. 1B, the connecting handle 120 may further include a use indicator 123. For example, the usage indicator 123 can include, for example, the letters "USED"; alternatively, the usage indicator 123 can be used to display a higher brightness color. According to an embodiment of the invention, the indicator 123 is used to display, for example, the words "USED" above, or to display a significant chroma, after the syringe has been used. Otherwise, the above "USED" or higher brightness color will not be revealed until the syringe is used. Thereby, the user can use the indicator 123 to determine whether the syringe has been used.

Continuing to refer to FIGS. 3A-3C, wherein FIG. 3A is a cross-sectional view of a piston end of a disposable syringe having a locking needle safety cover according to an embodiment of the present invention, and FIG. 3B is a diagram according to an embodiment of the present invention. A side view of the piston end of the disposable syringe with the locking needle safety cover, and FIG. 3C is a rear view of the piston end of the disposable syringe with the locking needle safety cover proposed in accordance with an embodiment of the present invention.

According to the present invention, a disposable syringe having a locking needle safety cover further includes a piston end 300 coupled to the piston arm 100.

As shown in FIGS. 3A-3C, the piston end 300 includes a tip head 310 and a tip base 320. The pedestal 320 has a hollow accommodating space 321 , and the accommodating space 321 can be used to accommodate the rod 140 of FIG. 1A . The base 320 further has one or more tip retaining arms 330. The tip flange 122 of Figure 1C is engageable with the projecting tip 330 whereby the piston end 300 is secured to the piston arm 100 of Figure 1A.

According to an embodiment of the present invention, as shown in FIG. 3A, the top end 310 of the piston end 300 may further have at least one head ring 311, thereby increasing the suction between the tip 310 and the syringe body such that the tip The 310 and the syringe body can be more closely attached together.

According to an embodiment of the present invention, the accommodating space 321 and the rod member 140 may be spherical.

According to another embodiment of the present invention, the accommodating space 321 and the rod member 140 may also have an angular non-spherical shape to effectively prevent the piston end 300 from being rotated away from the piston arm 100 when the two are engaged. For example, the accommodation space 321 and the rod 140 may be, for example, a rectangle, a triangle, or a hexagon. Therefore, when the rod member 140 is inserted into the accommodating space 321 of the piston end 300, the piston end 300 can only rotate together with the piston arm 100 (shown in FIG. 1A) with which it is engaged, without the piston arm. 100 separation.

Continuing to refer to FIGS. 2A-2C, wherein FIG. 2A is a cross-sectional view of a fixing sleeve of a disposable syringe having a locking needle safety cover according to an embodiment of the present invention, and FIG. 2B is an embodiment according to the present invention. A side view of a fixed sleeve of a disposable syringe having a latching needle safety cover, and a second embodiment of the present invention is a rear view of a fixed sleeve of a disposable syringe having a latching needle safety cover in accordance with an embodiment of the present invention.

A disposable syringe having a locking needle safety cover according to an embodiment of the invention further includes a fixing sleeve 200. In accordance with an embodiment of the present invention, the fixed sleeve 200 is a tube that surrounds the portion of the piston arm 100 of FIG. 1A and the piston end 300 of FIG. 3A. Wherein, according to the embodiment of the present invention, the fixing sleeve 200 may have a plurality of sleeve ribs 225, and each sleeve rib 225 is from the outer surface of the tube body of the fixing sleeve 200. It is formed by extending upwards and outwards.

According to an embodiment of the present invention, the inside of the tube of the fixing sleeve 200 may be provided with a groove, an angled or a chamfered. Thereby, the user can more easily design or remove the protruding tip 330 or the piston end 300 of the piston module from the fixing sleeve 200.

As shown in FIG. 2A, in an embodiment, the fixing sleeve 200 includes an inner sleeve 230 and an outer sleeve 220. The inner sleeve 230 may be made of plastic, for example, and the outer sleeve. The material of 220 may be, for example, a rubber, and the inner sleeve 230 is sleeved inside the outer sleeve. The inner sleeve 230 can have one or more sleeve tabs 235 for engaging between the inner and outer sleeves 230, 220 to prevent the inner sleeve 230 from being external. Relative sliding of the sleeve 220 occurs between the two.

In accordance with the present invention, the inner sleeve 230 of this embodiment is primarily used to reduce the friction between the stationary sleeve 200 and the piston arm 100. The sleeve rib 225 on the outer sleeve 220 is further adapted to allow the fixed sleeve 200 to be engaged with the syringe body to prevent the fixed sleeve 200 from slipping out of the syringe body.

Below, please refer to Figures 4A to 4F. 4A is a cross-sectional view of the syringe body having a disposable syringe with a locking needle safety cover disclosed in accordance with an embodiment of the present invention. 4B is a side view of a syringe body having a disposable syringe with a locking needle safety cover disclosed in accordance with an embodiment of the present invention. Figure 4C is a rear elevational view of the syringe body of the disposable syringe with the locking needle safety cover disclosed in accordance with an embodiment of the present invention. Figure 4D is a cross-sectional view of a stop block on a syringe body having a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention. Figure 4E is a side elevational view of the stop block on the syringe body of the disposable syringe having the locking needle safety cover in accordance with an embodiment of the present invention. Figure 4F is a rear elevational view of the stop block on the syringe body of the disposable syringe having the locking needle safety cover in accordance with an embodiment of the present invention.

A disposable syringe having a locking needle safety cover according to an embodiment of the invention further includes a syringe body 400. The syringe body 400 includes a syringe body tip 415, a syringe body wall 410, a body grab flange 450, and a sleeve stopper 460. In accordance with an embodiment of the present invention, the body tip 415 can be configured with a needle (not shown) that can be molded over the body tip 415 to facilitate the injecting of medication into the patient.

In this embodiment, the first body flange 450 is formed extending outwardly from the syringe body 400 of the syringe, which is primarily assisted by a medical professional or user implementing the syringe. For example, when the user pulls back the piston module by the hand portion 110, the user can choose to simultaneously place his or her finger above the first body flange 450 to thereby increase the force. When the user or the medical staff pushes the piston module by the hand portion 110, the user or the medical staff can also choose to simultaneously place the finger under the first body flange 450 to thereby exert a force.

According to an embodiment of the present invention, as shown in FIGS. 4D-4F, the stopper 460 further includes a second body flange 451 that can be engaged with the first body flange 450 of the syringe body 400. And a sleeve stopper wall 461, thereby preventing the fixing sleeves 200 of FIGS. 2A and 2B from being withdrawn from the syringe body 400.

According to an embodiment of the present invention, as shown in FIG. 4A, the syringe body 400 can further have one or more volume markers, whereby the user can know by reading the volume scale of the contents of the syringe. How many volumes of drug or solution have been introduced so far.

According to an embodiment of the present invention, as shown in FIG. 4A, the syringe body 400 further includes a front cover stop 486, a front holder 487, and a rear cover stop. (rear cover stop) 496, and a rear holder 497.

Wherein, the front cover stop portion 486 forms a barrier around the syringe body 400 for blocking the safety cover from being advanced. On the other hand, the back cover stop 496 similarly forms a barrier around the syringe body 400 for blocking the safety cover from being pulled back.

The front support portion 487 is circumferentially disposed around the syringe body 400 to support the safety cover in the correct position as the syringe body 400 is advanced. On the other hand, the rear support portion 497 is also disposed around the syringe body 400 in a loop shape to support the safety cover in the correct position when the syringe body 400 is pulled back.

In one embodiment, the syringe body 400 has a body channel 498 that is used to maintain and guide the latching needle safety cover to travel in the correct direction as it advances forward.

Please refer to the 4G to 4I drawings below. 4G is a cross-sectional view of the latching needle safety cover of the disposable syringe with the locking needle safety cover disclosed in accordance with an embodiment of the present invention. 4H is a side view of a latching needle safety cover of a disposable syringe having a latching needle safety cover disclosed in accordance with an embodiment of the present invention. Figure 4I is a rear elevational view of the latching needle safety cover of the disposable syringe with the locking needle safety cover disclosed in accordance with an embodiment of the present invention.

According to an embodiment of the present invention, the locking needle safety cover 500 includes: a cover body 510, a cover front opening 520, a cover guide 530, and a cover cover 530. A release opening 540, and a needle lock 550.

The needle lock 550 includes a lock wall 554 and a needle trap 555.

According to an embodiment of the present invention, as shown in FIGS. 4G to 4I, the safety cap guide 530 is formed to extend from the inner surface of the locking needle safety cover 500. Also, the safety cover guide 530 is slidable along the body passage 498 in the syringe body 400 of FIG. 4B to thereby control the movement of the locking needle safety cover 500 in the correct direction of travel while avoiding latch-up The needle safety cover 500 is purposely rotated.

According to an embodiment of the invention, the locking needle safety cover 500 is disposed outside the syringe body and has a safety cover disposed outside the syringe body, and the safety cover is designed as a retractable cover . In general, prior to use of the syringe, the locking needle safety cover 500 is disposed around the injection needle 430 (see Figures 5A, 5B) to prevent the user or medical personnel from accidentally touching the injection needle. As for the syringe needle 430, the user can slide the needle safety cover 500 to slide along the outer surface of the syringe body to expose the needle 430 as described above. In this case, the locking needle safety cover 500 is retracted while at the same time allowing the injection needle 430 to protrude from the safety cap front opening 520 of the locking needle safety cover 500 for injection into the patient. After the syringe is used, the user can again move the locking needle safety cover 500 back to its original position to cover its needle 430 again, preventing the needle 430 after the injection has been completed from accidentally touching the medical personnel.

Thereafter, the user can begin to rotate the locking needle safety cover 500. When the lock needle safety cover 500 is rotated, the above-described injection needle 430 is in contact with the needle engagement portion 555 of the needle lock 550, and then gradually folded toward the inside of the safety cover body 510. When the injection needle 430 contacts the bottom end of the needle engagement portion 555, the injection needle 430 is bent into the needle engagement portion 555, in which case the injection needle 430 that has completed the injection is engaged with the needle card. In the joint 555. It should be noted that the locking needle safety cover 500 disclosed in the embodiment of the present invention cannot be retracted again after the injection needle 430 is engaged into the needle engagement portion 555.

Furthermore, please refer to the 4th to 4th drawings. 4J is a cross-sectional view of a support ring of a disposable syringe having a locking needle safety cover disclosed in accordance with an embodiment of the present invention. 4K is a side view of a support ring of a disposable syringe having a locking needle safety cover disclosed in accordance with an embodiment of the present invention. 4L is a rear view of a support ring of a disposable syringe having a locking needle safety cover disclosed in accordance with an embodiment of the present invention.

According to an embodiment of the invention, the support ring 560 is disposed in the rear end opening of the syringe body 400. In addition, the support ring 560 can further include a release tab 565. Thus, when the support ring 560 is placed in the syringe body 400, the release tab 565 can be projected from the release opening 540 of the latching sleeve safety cover 500 in FIG. 4G.

Continue to see Figures 5A through 5E, and Figures 6A through 6H. 5A is a cross-sectional view of a disposable syringe having a locking needle safety cover according to an embodiment of the present invention, and FIG. 5B is a side view of a disposable syringe having a locking needle safety cover according to an embodiment of the present invention, 5C is a rear view of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention. 5D and 5E are cross-sectional views of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention. Figures 6A through 6H are schematic illustrations of various stages of a disposable syringe having a latching needle safety cover in accordance with an embodiment of the present invention. For the following description, please refer to the above-mentioned 1A to 4L drawings, which are explained in detail below.

First, as shown in Figs. 5A to 5E, it is an overall schematic view of the disposable syringe 10 having the locking needle safety cover of the present invention before use. In accordance with an embodiment of the present invention, such a disposable syringe 10 having a latching needle safety cover includes a piston module, a stationary sleeve 200, and a syringe body 400. The piston module includes a piston arm 100 and a piston end 300, and the fixed sleeve 200 is disposed in the syringe body 400.

According to an embodiment of the invention, the piston end 300 is located on the front end of the interior of the syringe body 400. The rod member 140 of the piston arm 100 is engaged in the accommodating space 321 of the base 320 of the piston end 300. The fixed sleeve 200 is wrapped around the protruding tip 330 of the piston end 300 and causes the protruding tip 330 to abut against the tip flange 122, thereby causing the piston end 300 to be secured with the piston arm 100.

In detail, as shown in FIGS. 6A to 6B, when the user pulls back the piston arm 100 by the hand portion 110, in this case, since the protruding tip 330 is still engaged with the tip end flange 122, The piston end 300 is fixed to the piston arm 100 while being pulled back (i.e., in the direction of the lower side of the figure). At this time, the top end 310 of the piston end 300 pushes the fixing sleeve 200 together, so that the fixing sleeve 200, the piston end 300, and the piston arm 100 are pulled together.

After the fixation sleeve 200 is moved rearwardly within the syringe body 400, the sleeve rib 225 of the fixation sleeve 200 is in contact with the body wall 410 of the syringe body 400. It should be noted that, according to an embodiment of the present invention, once the fixing sleeve 200 is moved rearward, the friction between the sleeve rib 225 located thereon and the body wall 410 of the syringe body 400 is relatively large. The fixed sleeve 200 cannot be moved forward again (ie, in the direction above the figure). In other words, the sleeve rib 225 is designed to limit the ability of the fixed sleeve 200 to be advanced, but it can continue to be pulled back.

Thereafter, if the user continues to pull back the piston arm 100, the fixed sleeve 200 will continue to be pulled back along with the piston module (including the piston arm 100 and the piston end 300).

When the fixation sleeve 200 is retracted to the bottom opening of the syringe body 400, the stop block 460 on the syringe body 400 will abut the fixation sleeve 200 such that the fixation sleeve 200 cannot continue to move backward. In other words, the stop block 460 is such that the fixed sleeve 200 cannot be withdrawn from the syringe body 400.

In this case, as shown in Fig. 6C, the fixed sleeve 200 is restrained from moving forward or backward again because the fixed sleeve 200 is blocked by the stopper 460 and cannot be continued. Move back. Moreover, the fixing sleeve 200 also makes the fixing sleeve 200 unable to move forward again due to the design of the sleeve rib 225.

Continuation Please refer to Figure 6D. Since the fixed sleeve 200 has been restrained at this time, it cannot be moved forward or backward. Therefore, if the user continues to push the hand portion 110, in this case, only the piston arm 100 can continue to move forward, and further, the protruding tip 330 on the piston end will be pushed out from the fixed sleeve 200. Still further, after the protruding tip 330 leaves the sleeve of the fixed sleeve 200, as shown in FIG. 6D, the protruding tip 330 will no longer engage with the tip flange 122 on the piston arm 100. However, despite this, the piston end 300 can continue to move forward by the pushing of the lever member 140 and the protruding tip 330 in contact therewith.

As shown in Figure 6E, as the piston module advances all the way forward, the final piston end 300 will be forced against the front end of the syringe body 400 near the needle.

At this time, if the user pulls back the piston arm 100 again, since the protruding tip 330 is no longer engaged with the tip flange 122, as shown in FIG. 6F, both the piston end 300 and the piston arm 100 will start. Separation.

Therefore, after the piston end 300 and the piston arm 100 are separated, the piston arm 100 will not be able to be coupled to the piston end 300 again. In other words, as shown in Figs. 6G and 6H, the disposable syringe 10 having the locking needle safety cover proposed by the present invention cannot be reused again.

In detail, when the protruding tip 330 retreats out of the sleeve of the fixed sleeve 200, the piston end 300 begins to separate from the piston arm 100. Moreover, the piston end 300 and the piston arm 100 cannot be combined again. Thereby, the user can no longer actuate the piston end 300 by pulling the piston arm 100.

Also, after the piston end 300 is separated from the piston arm 100, the use indicator 123 on the piston arm 100 is revealed. The user can know whether the syringe has been used by interpreting the use indicator 123.

Secondly, in order to expand the practical application level of the present invention, the product designer can selectively control the amount of the drug to be injected by the syringe by setting a plurality of sleeve ribs 225. For example, if the amount of drug to be introduced by the syringe is 25% of the tube volume of the syringe body, then the sleeve rib 225 can be optionally disposed at a position corresponding to 25% of the tube volume of the fixed sleeve 200. Moreover, if the amount of the drug to be introduced by the syringe is 50% of the tube volume of the syringe body, the other sleeve rib 225 should be disposed at 50% of the tube volume corresponding to the fixed sleeve 200 to control the fixing. After the sleeve 200 is routed to the position where the sleeve rib 225 is located, it cannot be pushed back again, and the piston end 300 also begins to separate from the piston arm 100 at this time.

According to an embodiment of the present invention, after the injection of the disposable syringe 10 having the locking needle safety cover of the present invention is completed, the piston arm 100 can be removed from the syringe body 400, and the piston arm 100 cannot be engaged with the piston again. Therefore, the present invention effectively achieves the purpose of ensuring that the syringe can only be used in a single use, and effectively avoids various problems that may occur in the common needle.

In view of the above, in order to enable the reviewing committee to further understand the techniques, means and functions of the present invention for achieving the intended purpose, the above is a detailed description and the accompanying drawings of the present invention. It is to be understood that the invention is not limited by the scope of the invention.

The disposable syringe with the locking needle safety cover disclosed in the present invention has a protruding tip disposed on the piston end and a tip flange disposed on the piston arm. When the fixing sleeve is disposed around the protruding tip, the piston arm and the piston end can be fixed by the protruding tip and the tip flange which are engaged with each other. If the user continues to advance the piston arm such that the protruding tip is pushed out of the fixed sleeve, the piston end and the piston arm will begin to separate. Thereby, the present invention achieves the effect of ensuring that the syringe can only be used in a single use.

The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent variations or modifications made by the spirit of the present invention should still be included in the scope of the present invention.

10. . . Disposable syringe with locking needle safety cover

100. . . Piston arm

110. . . Handheld department

111. . . Thread

112. . . Thread

120. . . Connection handle

122. . . Tip flange

123. . . Use indicator

140. . . Lever

200. . . Fixed sleeve

220. . . Outer sleeve

225. . . Sleeve rib

230. . . Inner sleeve

235. . . Sleeve piece

300. . . Piston end

310. . . top

320. . . Pedestal

321. . . Housing space

330. . . Highlight the tip

400. . . Syringe body

410. . . Body wall

415. . . Body tip

430. . . Injection needle

450. . . First body flange

451. . . Second body flange

460. . . Stop block

461. . . Stop wall

486. . . Front cover stop

487. . . Front support

496. . . Back cover stop

497. . . Rear support

498. . . Body channel

500. . . Locking needle safety cover

510. . . Safety cover body

520. . . Safety cover front opening

530. . . Safety cover guide

540. . . Release opening

550. . . Needle lock

554. . . Lock wall

555. . . Needle engagement

560. . . Support ring

565. . . Release piece

1A is a cross-sectional view of a piston arm of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

1B is a side view of a piston arm of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

1C is a rear elevational view of a piston arm of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

1D is a side view of a piston arm hand-held portion of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

1E is a cross-sectional view of a piston arm hand-held portion of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

1F is a rear elevational view of the piston arm handhold of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

2A is a cross-sectional view of a fixation sleeve of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

2B is a side view of a fixation sleeve of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

2C is a rear elevational view of the fixation sleeve of the disposable syringe with the locking needle safety cover proposed in accordance with an embodiment of the present invention.

Figure 3A is a cross-sectional view of the piston end of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 3B is a side elevational view of the piston end of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 3C is a rear elevational view of the piston end of a disposable syringe having a locking needle safety cover in accordance with an embodiment of the present invention.

4A is a cross-sectional view of a syringe body having a disposable syringe with a locking needle safety cover disclosed in accordance with an embodiment of the present invention.

4B is a side view of a syringe body having a disposable syringe with a locking needle safety cover disclosed in accordance with an embodiment of the present invention.

Figure 4C is a rear elevational view of the syringe body of the disposable syringe with the locking needle safety cover disclosed in accordance with an embodiment of the present invention.

Figure 4D is a cross-sectional view of a stop block on a syringe body having a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 4E is a side elevational view of the stop block on the syringe body of the disposable syringe having the locking needle safety cover in accordance with an embodiment of the present invention.

Figure 4F is a rear elevational view of the stop block on the syringe body of the disposable syringe having the locking needle safety cover in accordance with an embodiment of the present invention.

Figure 4G is a cross-sectional view of the latching needle safety cover of the disposable syringe with the locking needle safety cover disclosed in accordance with an embodiment of the present invention.

4H is a side view of a latching needle safety cover of a disposable syringe having a latching needle safety cover disclosed in accordance with an embodiment of the present invention.

Figure 4I is a rear elevational view of the latching needle safety cover of the disposable syringe with the locking needle safety cover disclosed in accordance with an embodiment of the present invention.

4J is a cross-sectional view of a support ring of a disposable syringe having a locking needle safety cover disclosed in accordance with an embodiment of the present invention.

4K is a side view of a support ring of a disposable syringe having a locking needle safety cover disclosed in accordance with an embodiment of the present invention.

4L is a rear view of a support ring of a disposable syringe having a locking needle safety cover disclosed in accordance with an embodiment of the present invention.

Figure 5A is a cross-sectional view of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 5B is a side elevational view of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 5C is a rear elevational view of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 5D is a cross-sectional view of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 5E is a cross-sectional view of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6A is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6B is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6C is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6D is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6E is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6F is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6G is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

Figure 6H is a schematic illustration of a stage of a disposable syringe with a locking needle safety cover in accordance with an embodiment of the present invention.

10. . . Disposable syringe with locking needle safety cover

120. . . Connection handle

200. . . Fixed sleeve

410. . . Body wall

430. . . Injection needle

500. . . Locking needle safety cover

510. . . Safety cover body

Claims (20)

A disposable syringe having a locking needle safety cover, comprising: a piston arm; a piston end; a fixing sleeve surrounding the piston arm and the piston end; a syringe body for receiving the a piston arm, the piston end and the fixing sleeve, wherein when a user first pulls back the piston arm and then pushes the piston arm, the piston end will be separated from the sleeve of the fixing sleeve, and the The piston end is separated from the piston arm; and a locking needle safety cover is disposed outside the syringe body, and when the user rotates the locking needle safety cover, one of the disposable syringe needles is engaged with the needle The needle safety cover is latched to prevent the locking needle safety cover from being retracted again. A disposable syringe having a latching needle safety cover as claimed in claim 1, wherein the piston end has at least one protruding tip that is engageable with a tip flange of the piston arm. A disposable syringe having a locking needle safety cover according to claim 1, wherein the outer surface of the fixing sleeve has at least one sleeve rib, the sleeve rib can restrict the fixing sleeve from being advanced . A disposable syringe having a locking needle safety cover according to claim 1, wherein the fixing sleeve comprises: an inner sleeve made of plastic; and an outer sleeve made of synthetic rubber. A disposable syringe having a locking needle safety cover according to claim 1, wherein the syringe body further includes a stopper for preventing the fixing sleeve from withdrawing from the syringe body. A disposable syringe having a latching needle safety cover as claimed in claim 1 wherein the piston arm has a usage indicator for indicating whether the syringe has been used. A disposable syringe having a locking needle safety cover according to claim 1, wherein the piston arm further includes a rod member that is engaged by the rod member inserted in the piston end. Piston end. A disposable syringe having a locking needle safety cover according to claim 7, wherein the rod member and the piston end portion are disposed corresponding to each other to prevent the piston end from being rotated away from the piston arm. A disposable syringe having a locking needle safety cover, comprising: a piston end having at least one protruding tip; a piston arm, the piston arm being engaged with the piston end by the at least one protruding tip; a fixing sleeve surrounding the protruding tip disposed at the piston end; a syringe body for receiving the piston arm, the piston end and the fixing sleeve; and a locking needle safety cover disposed on the In addition to the syringe body, when a user rotates the locking needle safety cover, one of the disposable syringes is snapped into the locking needle safety cover to prevent the locking needle safety cover from being retracted. A disposable syringe having a latching needle safety cover as claimed in claim 9 wherein the retaining sleeve has at least one sleeve rib that limits the advancement of the retaining sleeve. A disposable syringe having a locking needle safety cover according to claim 9, wherein the disposable syringe having the locking needle safety cover is located within the syringe body before and after use. A disposable syringe having a latching needle safety cover as claimed in claim 9, wherein the fixed tip is detached from the piston arm after the fixed tip leaves the sleeve of the fixed sleeve. A disposable syringe having a locking needle safety cover according to claim 9, wherein the syringe body further includes a stopper to prevent the fixing sleeve from withdrawing from the syringe body. A disposable syringe having a locking needle safety cover according to claim 9, wherein when the user first pulls back the piston arm and then pushes the piston arm, the fixed tip on the piston end leaves the fixing sleeve The range of the sleeve. A disposable syringe having a latching needle safety cover as claimed in claim 9 wherein the piston arm has a usage indicator for indicating whether the syringe has been used. A disposable syringe having a locking needle safety cover, comprising: a piston arm; a piston end having at least one protruding tip on the piston end for engaging the piston arm by the protruding tip: a fixing sleeve Having at least one sleeve rib, the fixing sleeve is disposed around the protruding tip when the protruding tip is engaged with the piston arm; a syringe body accommodating the piston arm, the piston end and the fixing a sleeve having a stop block for preventing the fixing sleeve from withdrawing from the syringe body; and a locking needle safety cover disposed outside the syringe body as a user When the locking needle safety cover is rotated, one of the injection needles of the disposable syringe is engaged in the locking needle safety cover to prevent the locking needle safety cover from being retracted again. A disposable syringe having a latching needle safety cover as claimed in claim 16 wherein the disposable syringe having the latching needle safety cover is located within the syringe body prior to use and after use. A disposable syringe having a latching needle safety cover as claimed in claim 16, wherein the fixed tip is detached from the piston arm after the fixed tip leaves the sleeve of the fixed sleeve. A disposable syringe having a latching needle safety cover as claimed in claim 16, wherein the syringe body further includes a stop block for preventing the retaining sleeve from exiting the syringe body. A disposable syringe having a latching needle safety cover as claimed in claim 16, wherein the fixed tip of the piston end is separated from the sleeve of the fixed sleeve when the user pushes the piston arm.