TW201304832A - Single use syringe with plunger arm safety cover - Google Patents

Abstract

A single use syringe with plunger arm safety cover comprises a plunger arm, a plunger tip, a syringe body, and a tip retaining sleeve. The tip retaining sleeve is surroundingly disposed around a protruding tip of the plunger tip, so as to make the protruding tip retaining arms to be engaged to the plunger arm. When a user pulls back the plunger arm, sleeve ribs on the tip retaining sleeve is locked to the syringe body so as to constrain the tip retaining sleeve to be pushed forward again. At this moment, if the use pushes the plunger arm, the protruding tip will start to separate from a sleeving range of the tip retaining sleeve to make the plunger arm and the plunger tip to separate from each other. When the plunger arm and the plunger tip are separated from each other, they cannot be engaged with each other again so that the syringe cannot be repeatedly used. Further, for a used syringe, the plunger arm thereof is removed from the syringe body and is coupled to a positioning lock of the body, while the plunger arm covers the needle of the used syringe, so as to effectively prevent the risk of an exposed needle accidently contacting human body.

Description

Disposable syringe with safety cap of piston arm

The present invention relates to a medical syringe, and more particularly to a disposable syringe that ensures that it cannot be reused and that has a safety cover on its needle.

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.

One of the main problems is that conventional syringes are structurally inaccessible, so that people who are interested can easily reuse the syringe.

For example, when a syringe injects a drug into a patient, the patient's blood, residual drugs, bacteria, viruses, or other pathogenic substances may remain 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 have an allergic reaction to the medication used by the first patient.

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

Moreover, when the medical staff uses the syringe, it is also possible to accidentally touch the needle on the syringe, which not only causes damage to the skin of the person's body surface, but also the syringe can no longer be used.

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 disposable syringe having a safety cover of a piston arm, which can not only automatically lock, but also automatically cut off its internal components after injection to prevent the syringe from being reused. There is also a safety cover over the needle to prevent the used syringe from being accidentally touched by the medical staff by the safety cover on the needle.

The disposable syringe with the piston arm safety cover provided by the invention comprises: a piston arm, a piston end, a syringe body, and a fixing sleeve. Wherein, the piston arm comprises a rod member which can be inserted into an opening 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.

When the user pulls back the piston arm of the syringe, the sleeve rib on the fixing sleeve will be snapped into the syringe body, whereby the movement of the fixing sleeve will be restricted and cannot be advanced further.

If the user pushes the piston arm of the syringe at this time, the protruding tip will begin to detach from the sleeve of the fixed sleeve, and the protruding tip will begin to separate from the piston arm. When the two are no longer engaged, the user can still push the piston end 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. Therefore, the disposable syringe proposed by the present invention achieves the purpose of being unrepeatable.

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.

According to an embodiment of the invention, after the injection of the disposable syringe of the present invention is completed, the piston arm is removed from the syringe body and the removed piston arm can still be attached to the syringe by the positioning lock.

Still further, as the piston arm moves along the positioning lock, the passage within the syringe limits the direction of travel of the piston arm to a particular direction. Thus, when the tip of the piston arm contacts the needle, the needle is initially squeezed into a passage opening in the passage of the syringe. At this time, if the user continues to advance the piston arm, the needle is not only squeezed into the passage of the syringe, but also begins to bend and deform. In this case, since the locking portion on the piston arm is disposed in pairs with the positioning lock, the locking portion starts to be engaged in the positioning lock on the syringe body, so that the piston arm after removal is The syringe body can be coupled together by a locking portion that is engaged with each other and a positioning lock. Also, the needle that is bent at this time is caught in the passage of the syringe and covered by the syringe body. Thereby, the invention not only achieves the purpose of ensuring that the syringe can only be used once, but also solves the problem that the needle after injection can be accidentally touched by the human body.

Secondly, according to an embodiment of the invention, the piston arm may further have a use indicator. 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 safety cover of the piston arm proposed by the invention not only avoids repeated use of the same syringe by medical personnel, but also effectively suppresses the possibility of the needles shared by the drug users.

In addition to this, a disposable syringe having a piston arm safety cover disclosed in accordance with the present invention can be used to reduce the risk of the user sharing medication and needle. Even if the user does not legally recycle or discard the syringe after the application of the medicine, the disposable syringe 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.

The disposable syringe with the safety cover of the piston arm of the present invention mainly comprises: a plunger assembly, a tip retaining sleeve, and a syringe body.

The piston module includes a plunger arm 100 and a plunger tip, wherein the piston end is selectively combinable or detachable from the piston arm 100. The medical staff mainly uses the piston module to introduce the medicine into the body of the syringe, and then the medicine can be injected into the patient.

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

As shown in FIGS. 1A to 1H, the piston arm 100 includes a plunger knob 110, a plunger stem 120, a tip flange 122, and a bar post (arm post 140). ), a plunger catch 150, a channel 160, and a gate opening 165 at the front end of the channel 160.

In an embodiment, the hand-held portion 110 and the connecting handle 120 may each have a corresponding thread 111, 112 to lock the hand-held portion 110 and the connecting handle 120 together by the two threads 111, 112.

In another embodiment, the hand piece 110 and the connecting handle 120 can of course be welded together by ultrasonic welding, for example.

According to an embodiment of the invention, the hand portion 110 is disposed at one end of the connection handle 120. The medical personnel or user can pull the piston arm 100 back by the hand portion 110 to introduce the liquid into the syringe. Similarly, the medical staff or user can push the piston arm 100 by the hand portion 110 to discharge the liquid from the syringe and inject into the patient.

The tip flange 122 of the piston arm 100 is tied to the rod 140 at the other end of the coupling shank 120, the primary purpose of which is to support and secure the piston end in the piston module.

The connecting handle 120 can further include a use indicator 123. For example, the usage indicator 123 can include, for example, the letters "USED"; or, the 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. Thereby, the user can use the indicator 123 to determine whether the syringe has been used.

The piston hook 150, together with the injector system, forms a positioning system that is primarily used to secure the position of the piston arm 100 in the syringe and to prevent the piston arm 100 from moving during delivery of the syringe. When the syringe is delivered to the destination and the medical personnel are ready to begin use, the medical personnel can first unscrew the piston arm 100 such that the piston hook 150 forms a keyhole-like key in the body of the syringe, after which The medical personnel can smoothly pull back the piston arm 100 to introduce the drug to be injected into the syringe.

According to an embodiment of the invention, the connecting handle 120 further includes a locking portion 170. The intention is that when the medical staff completes the injection and the piston arm 100 is removed from the syringe body, the piston arm 100 can be engaged with a positioning lock by the locking portion 170 on the connecting handle 120, and the lock is engaged at this time. The portion 170 is engaged with the positioning lock, so that the removed piston arm 100 can still be attached to the body of the syringe so as not to fall.

Please refer to FIGS. 3A-3C, wherein FIGS. 3A and 3B are side views of a piston end of a disposable syringe having a piston arm safety cover according to an embodiment of the present invention, and FIG. 3C is an embodiment according to the present invention. A cross-sectional view of a piston end of a disposable syringe having a piston arm safety cover.

The invention discloses a disposable syringe with a piston arm safety cover, the piston module further comprising a piston end 300 connecting the piston arm 100.

As shown in FIGS. 3A-3C, the piston end 300 includes a top end 310 and a base 320. The base 320 has an opening 321 for receiving the rod 140 of FIG. 1E. The base 320 further has one or more tip retaining arms 330. The tip flange 122 of Fig. 1E can be engaged with the projecting tip 330, whereby the piston end 300 is secured to the piston arm 100 of Fig. 1A.

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

According to another embodiment of the present invention, the opening 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 opening 321 and the rod 140 may be rectangular, triangular, or hexagonal. Therefore, when the rod member 140 is inserted into the opening 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 being separated from the piston arm 100. .

In addition, the top end 310 of the piston end 300 can have at least one head ring 311 to increase the suction between the tip 310 and the syringe body, so that the tip 310 and the syringe body can be more closely attached to each other. together.

Continuing to refer to FIGS. 2A-2B, wherein FIG. 2A is a side view of a fixing sleeve of a disposable syringe having a piston arm safety cover according to an embodiment of the present invention, and FIG. 2B is an embodiment according to the present invention. A cross-sectional view of a fixed sleeve of a disposable syringe having a safety cap of a piston arm.

The disposable syringe having the piston arm safety cover disclosed in the present invention includes a fixed sleeve 200. In accordance with an embodiment of the present invention, the fixed sleeve 200 is a tube that surrounds the piston arm 100 of FIG. 1A. The fixed sleeve 200 can have a plurality of sleeve ribs 225, and each of the sleeve ribs 225 is formed to extend outward from the tubular body of the fixed sleeve 200.

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

In one embodiment, the fixing sleeve 200 includes an inner sleeve 230 and an outer sleeve 220. The inner sleeve 230 may be made of plastic. The outer sleeve 220 may be made of synthetic rubber, and the inner sleeve 230. The sleeve is sleeved inside the outer sleeve. The inner sleeve 230 can have more than one sleeve tab 235 for engaging between the inner and outer sleeves 230, 220 to prevent relative sliding therebetween.

According to the present invention, the inner sleeve 230 of this embodiment is mainly used to reduce the friction between the fixed sleeve 200 and the piston arm 100. The sleeve rib 225 on the outer sleeve 220 can be further used to snap the fixing sleeve 200 to the syringe to prevent the fixing sleeve 200 from slipping out of the syringe body.

Please refer to the 4A to 4H diagrams below. 4A and 4B are side views of a syringe body having a disposable syringe with a piston arm safety cover in accordance with an embodiment of the present invention. Figure 4C is a cross-sectional view of the syringe body with a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention. Figure 4D is a rear elevational view of the syringe body with a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention. Figure 4E is a cross-sectional view of the stop block on the syringe body of the disposable syringe in accordance with an embodiment of the present invention. Figure 4F is a side elevational view of the stop block on the syringe body of the disposable syringe in accordance with an embodiment of the present invention. The first and fourth figures are rear views of the stop block on the syringe body of the disposable syringe in accordance with an embodiment of the present invention.

The disposable syringe having the piston arm safety cover disclosed herein includes a syringe body 400. The syringe body 400 includes a syringe body tip 415, a guide lock 470, a first body grasp flange 450, a sleeve stopper 460, and a slot. Key-way 465. The body tip 415 can be configured with a needle that can be molded over the body tip 415 to facilitate injecting the drug 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 the user or medical personnel using the syringe. For example, when the user pulls back the piston arm by the hand portion 110, the user can simultaneously place the finger above the first body flange 450 to thereby force the force. As for the user pushing the piston arm by the hand portion 110, the user may also choose to simultaneously place the finger under the first body flange 450 to thereby apply force.

The stop block 460 includes a second body flange 451 that can be used to engage the first body flange 450 of the syringe body 400 with the stop wall 461, thereby preventing the fixing sleeve 200 of the 2A and 2B drawings from the syringe The body 400 exits.

The inside of the stop block 460 may further have a slot 465, and the slot 465 may be shaped like a keyhole. According to an embodiment of the invention, the stop block 460 and the stop wall 461 are correspondingly disposed on the piston hook 150 of FIG. 1A to limit the movement of the piston arm 100.

Furthermore, only when the piston hook 150 and the slot 465 are in the same direction, the user can pull the piston arm 100 backward to use the syringe.

According to an embodiment of the present invention, as shown in FIG. 4A, the syringe body 400 can further have one or more scales 411, whereby the user can know how much volume is introduced by interpreting the scale 411 of the contents of the syringe. drug.

When the injection is completed, the piston arm 100 is withdrawn from the syringe body 400, and by the correspondingly disposed locking portion 170 and the positioning lock 470, the removed piston arm 100 can still be attached to the syringe.

Continue to see Figures 5A through 5C, and Figures 6A through 6G. 5A and 5B are side views of a disposable syringe having a piston arm safety cover according to an embodiment of the present invention, and FIG. 5C is a disposable syringe having a piston arm safety cover according to an embodiment of the present invention. A cross-sectional view, 6A through 6G, is a schematic view of various stages of a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention. For the following description, please refer to the above pictures 1A to 4H.

First, as shown in Fig. 5C, which is an overall schematic view of the disposable syringe 10 having a piston arm safety cover of the present invention before use, in the embodiment of the present invention, such a disposable syringe having a piston arm safety cover The 10 series includes a piston module (piston arm 100 and piston end 300), a fixed sleeve 200, and a syringe body 400.

The piston end 300 is located on the front end of the interior of the syringe body 400. The rod 140 of the piston arm 100 is snapped into the opening 321 of the base 320 of the piston end 300. The fixed sleeve 200 surrounds the protruding tip 330 disposed at the piston end 300 and causes the protruding tip 330 to abut against the tip flange 122, thereby securing the piston end 300 with the piston arm 100.

In accordance with an embodiment of the present invention, the piston hook 150 can be fitted to the stop wall 461 in the syringe body 400 to thereby restrict movement of the piston arm 100 within the syringe body 400 (i.e., in the direction of the lower portion of the illustration). In detail, if the end of the piston hook 150 is fitted into the stopper wall 461, the front end of the piston hook 150 can no longer be withdrawn from the fixed sleeve 200 of the syringe.

If the user continues to pull back the piston arm 100, the piston arm 100 gradually exits the syringe body 400, and the removed piston arm 100 can still be engaged with the syringe by the positioning lock 470.

In general, as the piston arm 100 slides along the positioning lock 470, the passage 160 in the syringe can maintain the piston arm 100 in a direction parallel to the direction of travel of the piston arm 100. Thereby, when the tip end of the piston arm 100 contacts the needle 430, the needle 430 can be squeezed into the passage 160 of the syringe. If the piston arm 100 continues to advance, the needle 430 is not only squeezed into the passage 160 of the syringe, but also begins to undergo bending deformation. According to an embodiment of the present invention, the present invention is provided with the locking portion 170 and the positioning lock 470 disposed in pairs, so that the removed piston arm 100 and the syringe body 400 can be positioned by the interlocking locking portions 170 and The locks 470 are joined together and further achieve the advantages of the present invention having a safety cover over the injected needle.

In detail, as shown in FIGS. 6A to 6B, when the user pulls back the piston arm 100, in this case, the protruding tip 330 still engages with the tip flange 122, whereby the piston end 300 is coupled with The piston arms 100 are fixed together while being pulled back (ie, to the left of the illustration). At this time, the tip end 310 of the piston end 300 pushes the fixing sleeve 200 such that the fixed sleeve 200, the piston end 300, and the piston arm 100 are pulled together.

After the fixing sleeve 200 is moved backward in the syringe body 400, the sleeve rib 225 of the fixing sleeve 200 is in contact with the inner wall 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 backward, the friction between the sleeve rib 225 located thereon and the inner wall of the syringe body 400 is relatively large, so that The fixed sleeve 200 cannot move forward again (ie, in the direction to the right of the figure). In other words, the sleeve rib 225 is designed to limit the advancement of the sleeve 200, 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 fixed 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 fixed sleeve 200, making it impossible to continue moving backward. In other words, the stop block 460 prevents the fixed sleeve 200 from being withdrawn from the syringe body 400. In this case, as shown in Fig. 6B, the fixed sleeve 200 is blocked by the stopper 460, so that it is not possible to continue moving backward. 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 6C. 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 is pushed out of the fixed sleeve 200. 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 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 piston end 300 will eventually stop at the forward 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, the piston end 300 and the piston arm 100 will begin to separate.

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, the disposable syringe 10 proposed by the present invention cannot be reused.

In detail, when the protruding tip 330 moves out of the sleeve of the fixed sleeve 200, the piston end 300 begins to separate from the piston arm 100. 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.

In order to expand the practical application level of the present invention, the product designer can 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, the sleeve rib 225 can optionally be placed at a position corresponding to 25% of the tube volume. 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 placed at a position corresponding to 50% of the tube volume to control the row of the fixing sleeve 200. After the sleeve rib 225 is located, it cannot be pushed back again, and the piston end 300 also starts to separate from the piston arm 100 at this time.

According to an embodiment of the present invention, after the disposable syringe 10 of the present invention completes the injection, the piston arm 100 is removed from the syringe body 400, and the removed piston arm 100 can still be attached to the syringe by the positioning lock 470. on.

The embodiment is such that, as shown in Figures 6F-6G, when the piston arm 100 is displaced along the positioning lock 470, the passage 160 in the syringe limits the direction of travel of the piston arm 100. Thus, when the tip of the piston arm 100 contacts the needle 430, the needle 430 will begin to be squeezed into the passage opening 165 of the passage 160 of the syringe. At this time, if the user continues to advance the piston arm 100, the needle 430 is not only squeezed into the passage 160 of the syringe, but also begins to bend. In this case, since the locking portion 170 is disposed in pairs with the positioning lock 470, the locking portion 170 starts to engage with the positioning lock 470 on the syringe body 400, so that the removed piston arm 100 is removed. The syringe body 400 can be coupled to the positioning lock 470 by a locking portion 170 that is engaged with each other. Further, as shown in Fig. 6G, the needle 430 which is bent at this time is caught in the passage 160 of the syringe and covered by the syringe body. Thereby, the invention not only achieves the purpose of ensuring that the syringe can only be used once, but also solves the problem that the needle after injection can be accidentally touched by the human body.

In addition to this, when the bent needle 430 is caught in the passage of the syringe, the use indicator 123 on the piston arm 100 is also revealed. At this time, the user can judge whether the syringe 10 has been used by interpreting the text or color on the use indicator 123.

In summary, the disposable syringe with the piston arm 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 safety cap of piston arm

100. . . Piston arm

110. . . Handheld department

111. . . Thread

112. . . Thread

120. . . Connection handle

122. . . Tip flange

123. . . Use indicator

140. . . Lever

150. . . Piston hook

160. . . aisle

165. . . Channel opening

170. . . Locking part

200. . . Fixed sleeve

220. . . Outer sleeve

225. . . Sleeve rib

230. . . Inner sleeve

235. . . Sleeve piece

300. . . Piston end

310. . . top

311. . . Top ring

320. . . Pedestal

321. . . Opening

330. . . Highlight the tip

400. . . Syringe body

411. . . Scale

415. . . Body tip

430. . . Needle

450. . . First body flange

451. . . Second body flange

460. . . Stop block

461. . . Stop wall

465. . . Slot

470. . . Positioning lock

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

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

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

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

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

1F is a side view of a piston arm hand-held portion of a disposable syringe in accordance with an embodiment of the present invention.

1G is a cross-sectional view of a hand grip of a piston arm of a disposable syringe in accordance with an embodiment of the present invention.

Figure 1H is a rear elevational view of the piston arm handpiece of a disposable syringe in accordance with an embodiment of the present invention.

2A is a side view of a fixing sleeve of a disposable syringe having a safety arm of a piston arm in accordance with an embodiment of the present invention.

2B is a cross-sectional view of a fixing sleeve of a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention.

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

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

4A is a side view of a syringe body having a disposable syringe with a piston arm safety cover in accordance with an embodiment of the present invention.

Figure 4B is a side elevational view of the syringe body of a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention.

Figure 4C is a cross-sectional view of the syringe body with a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention.

Figure 4D is a rear elevational view of the syringe body with a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention.

Figure 4E is a cross-sectional view of the stop block on the syringe body of the disposable syringe in accordance with an embodiment of the present invention.

Figure 4F is a side elevational view of the stop block on the syringe body of the disposable syringe in accordance with an embodiment of the present invention.

Figure 4G is a rear elevational view of the stop block on the syringe body of the disposable syringe in accordance with an embodiment of the present invention.

Figure 4H is a rear elevational view of the stop block on the syringe body of the disposable syringe in accordance with an embodiment of the present invention.

Figure 5A is a side elevational view of a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention.

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

Figure 5C is a cross-sectional view of a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention.

6A through 6G are schematic views of various stages of a disposable syringe having a piston arm safety cover in accordance with an embodiment of the present invention.

10. . . Disposable syringe with safety cap of piston arm

160. . . aisle

170. . . Locking part

430. . . Needle

Claims (20)

A disposable syringe having a piston arm safety cover, comprising: a piston end having at least one protruding tip; a piston arm comprising: a rod member receivable from one of the piston ends Inside the opening; a tip flange engageable with the protruding tip to engage the piston end and the piston arm; and a passage for receiving the needle of the disposable syringe; a fixing sleeve when the tip When the flange is engaged with the protruding tip, the fixing sleeve is disposed around the protruding tip; and a syringe body receives the piston arm, the piston end and the fixing sleeve, the syringe body has a positioning lock The piston arm of the disposable syringe after use is joined to the syringe body. A disposable syringe having a piston arm safety cover according to claim 1, wherein the fixing sleeve has at least one sleeve rib that limits the advancement of the fixed sleeve. A disposable syringe having a safety cap of a piston arm according to claim 1, wherein the piston arm further comprises: a locking portion corresponding to the positioning lock disposed on the syringe body to enable the disposable after use The piston arm of the syringe is coupled to the syringe body. A disposable syringe having a piston arm safety cover according to claim 1, further comprising: a piston hook disposed on the piston arm; and a slot disposed in the syringe body only for the piston When the hook is in the same direction as the slot, the piston arm can move backward. A disposable syringe having a piston arm safety cover according to claim 1, wherein the syringe body further includes a stopper to prevent the fixing sleeve from withdrawing from the syringe body. A disposable syringe having a piston arm 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 piston arm safety cover as claimed in claim 1, wherein the passage further has a passage opening for guiding the needle into the passage of the piston arm. A disposable syringe having a piston arm safety cover according to claim 1, wherein when the disposable syringe is used, the piston arm is removed from the syringe body, and the piston arm is coupled to the positioning lock, Before the needle of the syringe enters the passage of the piston arm, the piston arm continues to advance so that the piston arm is finally engaged to the syringe body by the positioning lock. A disposable syringe having a piston arm safety cover, comprising: a piston end having at least one protruding tip; a piston arm comprising: a rod member receivable from one of the piston ends Inside the opening; a tip flange engageable with the protruding tip to engage the piston end and the piston arm; and a passage for receiving the needle of the disposable syringe; a fixing sleeve when the tip When the flange is engaged with the protruding tip, the fixing sleeve is disposed around the protruding tip, the fixing sleeve has at least one sleeve rib, and the sleeve rib restricts the fixing sleeve from being advanced And a syringe body accommodating the piston arm, the piston end and the fixing sleeve, the syringe body having a positioning lock on an outer surface thereof for engaging the piston arm of the disposable syringe after use Syringe body. A disposable syringe having a safety cap of a piston arm according to claim 9, wherein the piston arm further comprises: a locking portion corresponding to the positioning lock disposed on the syringe body to enable the disposable after use The piston arm of the syringe is coupled to the syringe body. A disposable syringe having a piston arm safety cover according to claim 9, further comprising: a piston hook disposed on the piston arm; and a slot disposed in the syringe body only when the piston When the hook is in the same direction as the slot, the piston arm can move backward. A disposable syringe having a piston arm 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 piston arm safety cover according to claim 9, wherein the fixing sleeve comprises: an inner sleeve made of plastic; and an outer sleeve made of synthetic rubber. A disposable syringe having a piston arm safety cover according to claim 9, wherein the passage further has a passage opening for guiding the needle into the passage of the piston arm. A disposable syringe having a piston arm safety cover according to claim 9, wherein when the disposable syringe is used, the piston arm is removed from the syringe body, and the piston arm is coupled to the positioning lock, Before the needle of the syringe enters the passage of the piston arm, the piston arm continues to advance so that the piston arm is finally engaged to the syringe body by the positioning lock. A disposable syringe having a piston arm safety cover, comprising: a piston end having at least one protruding tip; a piston arm comprising: a rod member receivable from one of the piston ends Inside the opening; a tip flange engageable with the protruding tip to engage the piston end and the piston arm; a passage for receiving the needle of the disposable syringe; a piston hook; and a locking portion a fixing sleeve, the fixing sleeve is disposed around the protruding tip when the tip flange is engaged with the protruding tip, the fixing sleeve has at least one sleeve rib, and the sleeve rib is Restricting the fixing sleeve from being advanced; and a syringe body accommodating the piston arm, the piston end and the fixing sleeve, the syringe body comprising: a stopper that prevents the fixing sleeve from exiting the syringe a positioning lock is disposed on an outer surface of the syringe body, the positioning lock is engaged with the locking portion of the piston arm to engage the piston arm of the disposable syringe after use injection A body; and a slot, which is provided based on the syringe body, the piston only when the piston arm of the hook with the slot shape in the same direction, the piston arm before moving back. A disposable syringe having a piston arm safety cover according to claim 16, wherein the protruding tip is separated from the piston arm after the protruding tip leaves the sleeve of the fixed sleeve. A disposable syringe having a piston arm safety cover according to claim 16, wherein the fixing sleeve comprises: an inner sleeve made of plastic; and an outer sleeve made of synthetic rubber. A disposable syringe having a piston arm safety cover as claimed in claim 16, wherein the passage further has a passage opening for guiding the needle into the passage of the piston arm. A disposable syringe having a piston arm safety cover according to claim 16, wherein when the disposable syringe is used, the piston arm is removed from the syringe body, and the piston arm is coupled to the positioning lock, Before the needle of the syringe enters the passage of the piston arm, the piston arm continues to advance so that the piston arm is finally engaged to the syringe body by the positioning lock.