CN103007398A - Disposable syringe with safety cap for locking needle - Google Patents

Abstract

A disposable syringe with a safety cap for locking needle is composed of a piston arm, a piston end, a syringe body, a fixing sleeve and a safety cap for locking needle. The piston end is clamped with the piston arm by at least one protruding tip. When the user pulls back the piston arm, the sleeve rib on the fixed sleeve is clamped on the syringe body to limit the fixed sleeve to be pushed forward again. If the user pushes the plunger arm, the protruding tip will be separated from the fixing sleeve, so that the plunger arm and the plunger end are separated, and then the two can not be clamped again. In addition, when the user rotates the safety cover for locking the needle, the injection needle of the syringe is clamped into the safety cover, so that the disposable syringe with the safety cover for locking the needle can not be reused.

Description

Disposable syringes with latching needle safety caps

technical field

The invention relates to a medical syringe, in particular to a disposable syringe with a locking needle safety cover which has both safety and high efficiency to ensure that it cannot be reused.

Background technique

A syringe is a fairly common medical product, which injects medicine into a patient's body to achieve a therapeutic effect. Generally speaking, the medical staff first introduces the medicine into the syringe, and then injects the medicine into the patient's body through the needle on the syringe.

In terms of practical use, there are many potential risk factors in traditional syringes. When used improperly, it will cause very serious harm and adverse effects on the health of patients.

One of the main problems is that the traditional syringes are extremely easy to be reused. The reason is that the traditional syringes are structurally unavoidable to avoid reuse, so those who are interested can still easily reuse the syringes.

For example, when a syringe injects medicine into a patient, the patient's blood (blood), residual medicine (medicine), virus (virus), bacteria (bacteria), or other pathogenic substances (contaminant) Both may remain on the syringe or its needle. When the same syringe is reused on a second patient, the second patient may be infected with the bacteria from the previous patient.

If the first patient is infected with the virus, the second patient may be infected with the same virus by sharing the syringe with the first patient. Alternatively, the second patient may also have an allergic reaction to the drug used by the first patient.

Furthermore, in terms of the appearance of the syringe alone, it is difficult for medical personnel to judge whether it is a used syringe.

Therefore, in view of the above, how to provide a safe and effective syringe that cannot be reused is one of the problems that those skilled in the art need to solve urgently.

Contents of the invention

In order to solve the problems existing in the prior art, the main purpose of the present invention is to provide a safe disposable syringe with a locking needle safety cover, which can be automatically locked and automatically cut off its internal components after injection, thereby effectively avoiding Syringes are reused.

The invention provides a disposable syringe with a locking needle safety cover, which comprises: a piston arm; a piston end; a fixed sleeve, which is arranged around the piston arm and the piston end; a syringe body, used To accommodate the piston arm, the piston end and the fixed sleeve, wherein when a user first pulls back the piston arm and then pushes the piston arm, the piston end will leave the sleeve range of the fixed sleeve, At the same time, the piston end is separated from the piston arm; and a locking needle safety cover is arranged outside the syringe body, when the user rotates the locking needle safety cover, an injection needle of the disposable syringe is engaged with the Lock the inside of the needle safety cover to prevent the locked needle safety cover from being retracted for use again.

In the disposable syringe with a locking needle safety cover, there is at least one protruding tip on the piston end, and the protruding tip is engaged with a tip flange on the piston arm.

In the disposable syringe with a locking needle safety cover, the fixing sleeve has at least one sleeve rib on its outer surface, and the sleeve rib restricts the fixing sleeve from being pushed forward.

The disposable syringe with a locking needle safety cover, wherein the fixing sleeve contains:

an inner sleeve made of plastic; and

A sleeve is made of synthetic rubber.

In the disposable syringe with a locking needle safety cover, the syringe body further includes a stopper, and the stopper is used to prevent the fixing sleeve from withdrawing from the syringe body.

In the disposable syringe with a locking needle safety cover, there is a use indicator on the piston arm, and the use indicator is used to show whether the syringe has been used.

In the disposable syringe with a locking needle safety cover, the piston arm further includes a rod, and the piston arm is engaged with the piston end through the rod inserted in the piston end.

In the disposable syringe with a locking needle safety cover, the rod member and the piston end are arranged corresponding to each other, so as to prevent the piston end from spinning off from the piston arm.

The present invention also provides a disposable syringe with a locking needle safety cap, comprising: a piston end with at least one protruding tip; a piston arm engaged with the at least one protruding tip the piston end; a fixed sleeve surrounding the protruding tip of the piston end; a syringe body for accommodating the piston arm, the piston end and the fixed sleeve; and a locking needle safety cover disposed on the piston end Outside the syringe body, when a user rotates the locking needle safety cover, an injection needle of the disposable syringe engages in the locking needle safety cover, so as to prevent the locking needle safety cover from being retracted again for use.

In the disposable syringe with a locking needle safety cover, the fixing sleeve has at least one set of sleeve ribs, and the sleeve ribs restrict the fixing sleeve from being pushed forward.

In the disposable syringe with a locking needle safety cover, the piston end is located in the syringe body before and after use of the disposable syringe with a locking needle safety cover.

In the disposable syringe with a locking needle safety cover, after the fixed tip leaves the sleeve range of the fixed sleeve, the fixed tip is separated from the piston arm.

In the disposable syringe with a locking needle safety cover, the syringe body further includes a stopper to prevent the fixing sleeve from withdrawing from the syringe body.

In the disposable syringe with a locking needle safety cover, when the user first pulls back the piston arm and then pushes the piston arm, the fixed tip on the piston end leaves the sleeve of the fixed sleeve scope.

In the disposable syringe with a locking needle safety cover, there is a use indicator on the piston arm, and the use indicator is used to show whether the syringe has been used.

The present invention also provides a disposable syringe with a locking needle safety cover, which includes: a piston arm; a piston end with at least one protruding tip to engage with the piston arm by means of the protruding tip: a The fixed sleeve has at least one set of ribs. When the protruding tip is engaged with the piston arm, the fixed sleeve is arranged around the protruding tip; a syringe body accommodates the piston arm, the piston end and the piston arm. The fixed sleeve has a stop block on the syringe body, the stop block is used to prevent the fixed sleeve from exiting the syringe body; and a locking needle safety cover is arranged on the outside of the syringe body, when a user rotates When locking the needle safety cover, an injection needle of the disposable syringe is engaged in the locking needle safety cover, so as to prevent the locking needle safety cover from being retracted again for use.

In the disposable syringe with a locking needle safety cover, the piston end is located in the syringe body before and after use of the disposable syringe with a locking needle safety cover.

In the disposable syringe with a locking needle safety cover, after the fixed tip leaves the sleeve range of the fixed sleeve, the fixed tip is separated from the piston arm.

In the disposable syringe with a locking needle safety cover, the syringe body further includes a stopper to prevent the fixing sleeve from exiting the syringe body.

In the disposable syringe with a locking needle safety cover, when the user pushes the piston arm, the fixed tip on the piston end leaves the sleeve range of the fixed sleeve.

According to an embodiment of the present invention, the aforementioned locking needle safety cover is disposed outside the syringe body and has a retractable safety cover. Before the syringe is used, the locking needle safety cover is arranged around an injection needle of the syringe to prevent users or medical personnel from accidentally touching the injection needle. When the syringe is in use, the user can expose the above-mentioned injection needle by pulling back the locking needle safety cover and sliding it along the outer surface of the syringe body. In this case, the locking needle safety cover is retracted, and at the same time, the injection needle protrudes from the front opening of the locking needle safety cover for injection into the patient's body. After the syringe is used up, the user can move the locking needle safety cover back to its original position to cover the needle again, so as to prevent the needle after the injection from touching the medical personnel by mistake.

Afterwards, the user can rotate and lock the needle safety cover. When the locking needle safety cover is rotated, the above-mentioned injection needle contacts a needle engaging portion of the needle lock, and then is gradually folded towards the inside of the safety cover body. When the injection needle touches the bottom end of the needle engaging part, the injection needle is bent into the needle engaging part, and in this case, the injected injection needle is engaged in the needle engaging part. It should be noted that once the injection needle is engaged in the needle engaging portion, the locking needle safety cover disclosed in the embodiment of the present invention cannot be retracted for use again.

According to an embodiment of the present invention, the piston arm can further include a rod, and the rod can be inserted into an accommodating space in the base of the piston end. The fixing sleeve is arranged around the protruding tip of the piston end, so that the fixing sleeve can make the protruding tip engage with the piston arm.

According to an embodiment of the present invention, when the user pulls back the plunger arm of the syringe, the sleeve ribs on the fixed sleeve will engage in the syringe body, thus, the movement of the fixed sleeve will be restricted, and Unable to push forward again.

If the user starts to push the plunger arm of the syringe forward at this time, the protruding tip will start to break away from the sleeve range of the fixed sleeve, so that the protruding tip will thus start to separate from the plunger arm. When the protruding tip and the piston arm are no longer engaged together, the user can still push the rod of the piston arm to drive the piston end until the piston end touches the front end of the syringe body. However, according to the embodiment of the present invention, once the piston end is detached from the piston arm, the two cannot be engaged again. Also, the piston end cannot be pulled back again. Therefore, the present invention proposes a disposable syringe with a locking needle safety cover, thereby achieving the purpose of preventing the syringe from being reused.

The plunger arm disclosed in the present invention can form a positioning system together with the syringe body, which is mainly used to fix the position of the plunger arm in the syringe and prevent the plunger arm from being displaced during the delivery of the syringe. When the syringe is transported to its destination and the medical personnel is ready to use it, the medical personnel can first unscrew the plunger arm to disengage the plunger assembly in place. After that, the medical personnel can smoothly pull back the plunger arm to introduce the drug to be injected into the syringe.

Secondly, according to the disclosed embodiment of the present invention, there may be a use indicator on the piston arm. In an embodiment, the use indicator may include, for example, letters of "USED"; or, the use indicator may display a brighter color. When the syringe has been used, the use indicator will display the above-mentioned "USED", or display obvious chroma. Thus, the user can determine whether the syringe has been used by reading the use indicator.

To sum up, the disposable syringe with locking needle safety cover proposed by the present invention not only prevents medical personnel from reusing the same syringe, but also effectively prevents drug addicts or drug abusers from sharing needles.

In addition, according to the disposable syringe with locking needle safety cover disclosed by the present invention, it can be used to reduce the risk of users sharing medicine and needles. Even if the user does not legally reclaim or discard the syringe after administering the medicine, the disposable syringe with the locking needle safety cover disclosed by the present invention can effectively prevent the next user from reusing it.

Below, detailed descriptions will be given through specific embodiments in conjunction with the accompanying drawings, so that it will be easier to understand the purpose, technical content, features and effects of the present invention.

Description of drawings

1A is a cross-sectional view of a plunger arm of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

Fig. 1B is a side view of a plunger arm of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

Fig. 1C is a rear view of the plunger arm of the disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

1D is a side view of the handle of the plunger arm of the disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

Fig. 1E is a cross-sectional view of the handle of the plunger arm of the disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

1F is a rear view of the handle of the plunger arm of the disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

Fig. 2A is a cross-sectional view of a fixed sleeve of a disposable syringe with a locking needle safety cover proposed according to an embodiment of the present invention;

2B is a side view of the fixing sleeve of the disposable syringe with a locking needle safety cover proposed according to an embodiment of the present invention;

2C is a rear view of the fixing sleeve of the disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

3A is a cross-sectional view of the piston end of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

3B is a side view of the piston end of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

3C is a rear view of the plunger end of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

4A is a cross-sectional view of a syringe body of a disposable syringe with a locking needle safety cover disclosed according to an embodiment of the present invention;

4B is a side view of the syringe body of the disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

4C is a rear view of the syringe body of the disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

4D is a cross-sectional view of a stopper on a syringe body of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

4E is a side view of a stop on a syringe body of a disposable syringe with a latching needle safety cap according to an embodiment of the present invention;

4F is a rear view of a stopper on a syringe body of a disposable syringe with a latching needle safety cap according to an embodiment of the present invention;

4G is a cross-sectional view of a locking needle safety cover of a disposable syringe with a locking needle safety cover disclosed according to an embodiment of the present invention;

4H is a side view of a locking needle safety cover of a disposable syringe with a locking needle safety cover disclosed according to an embodiment of the present invention;

4I is a rear view of a locking needle safety cover of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

4J is a cross-sectional view of a support ring of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

4K is a side view of a support ring of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

4L is a rear view of a support ring of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention;

5A is a cross-sectional view of a disposable syringe with a latching needle safety cover according to an embodiment of the present invention;

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

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

5D is a cross-sectional view of a disposable syringe with a latching needle safety cover according to an embodiment of the present invention;

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

Fig. 6A is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

Fig. 6B is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

Fig. 6C is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

Fig. 6D is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

Fig. 6E is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

FIG. 6F is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

Fig. 6G is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention;

6H is a schematic diagram of stages during use of a disposable syringe with a locking needle safety cap according to an embodiment of the present invention.

Explanation of reference numerals: 10-disposable syringe with locking needle safety cap; 100-piston arm; 110-hand grip; 111-thread; 112-thread; 120-connecting handle; 140-rod; 200-fixed sleeve; 220-outer sleeve; 225-sleeve convex rib; 230-inner sleeve; 235-sleeve piece; 300-piston end; 310-top; Seat; 321-accommodating space; 330-protruding 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-locking wall; ring; 565-release sheet.

Detailed ways

The above description about the content of the present invention and the following embodiments are used to demonstrate and explain the spirit and principle of the present invention, and provide further explanation of the patent application scope of the present invention. Regarding the characteristics, implementation and effects of the present invention, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

For the following description, please also refer to FIG. 1A to FIG. 1F . 1A , 1B and 1C are respectively a cross-sectional view, a side view and a rear view of a plunger arm of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. 1D is a side view of the plunger arm handle of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. 1E is a cross-sectional view of the plunger arm handle of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. 1F is a rear view of the plunger arm handle of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention.

The disposable syringe (single use syringe) disclosed by the present invention has the locking needle safety cover, mainly comprises: a plunger assembly (plunger assembly), a fixing sleeve (tip retaining sleeve), and a syringe body (syringe body) .

The above-mentioned piston assembly includes a plunger arm and a plunger tip, and the plunger tip and the plunger arm can be selectively disassembled or assembled together. Generally speaking, the medical personnel mainly use the plunger assembly to first introduce the medicine into the syringe body, and then the medical personnel can inject the medicine into the patient's body.

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 handle 110 may further have at least one thread tip 111, and by virtue of the thread 111, the handle 110 is locked on the connecting handle 120. in the thread 112. In other words, the present invention locks the handle portion 110 and the connecting handle 120 together through two sets of threads 111 and 112 provided corresponding to each other.

According to another embodiment of the present invention, the joining method of the handle 110 and the connecting handle 120 is not limited to the above-mentioned screwing, and of course the two can also rely on such as ultrasonic (ultrasonic) welding to join the handle. 110 and connecting handle 120 are welded together.

According to an embodiment of the present invention, the handle portion 110 is disposed at one end of the connecting handle 120 . Medical personnel or users can pull back the plunger arm 100 by means of the handle 110 to introduce liquid or medicine to be injected into the syringe. Similarly, medical personnel or users can push the plunger arm 100 with the handle 110 to push the plunger assembly forward, and at the same time, the liquid or medicine to be injected is discharged from the syringe and injected into the patient's body.

On the other hand, the piston arm 100 includes at least one tip flange 122 and a rod 140 , and the above-mentioned tip flange 122 and rod 140 are disposed at the other end of the connecting handle 120 . According to an embodiment of the present invention, the main purpose of the tip flange 122 and the rod 140 is to hold and position the piston end of the piston assembly.

As shown in FIG. 1B , the connection handle 120 may further include a use indicator 123 . For example, the use indicator 123 may include letters such as "USED"; or, the use indicator 123 may be used to display a color with higher brightness. According to an embodiment of the present invention, when the syringe has been used, the use indicator 123 will display the words "USED", or display a clear chroma. Otherwise, the above-mentioned "USED" or the brighter color will not be displayed until the syringe is used. Thus, the user can judge whether the syringe has been used by using the indicator 123 .

Please refer to Figure 3A to Figure 3C, wherein Figure 3A is a cross-sectional view of the piston end of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention, and Figure 3B is a cross-sectional view of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. Side view of the plunger end of a disposable syringe, and FIG. 3C is a rear view of the plunger end of a disposable syringe with a latching needle safety cap according to an embodiment of the present invention.

According to the disposable syringe with locking needle safety cap disclosed in the present invention, the piston assembly further includes a piston end 300 connected to the piston arm 100 .

As shown in FIGS. 3A to 3C , the piston end 300 includes a tip head 310 and a tip base 320 . Wherein, the base 320 has a hollow accommodating space 321 , and the accommodating space 321 can be used to accommodate the rod 140 in FIG. 1A . The base 320 further has one or more protruding tip (tip retaining arm) 330. The tip flange 122 in FIG. 1C can be snapped onto the protruding tip 330 , thereby securing the piston end 300 with the piston arm 100 of FIG. 1A .

According to an embodiment of the present invention, as shown in FIG. 3A , there may be at least one top ring (head ring) 311 on the top 310 of the piston end 300, thereby increasing the suction force between the top 310 and the syringe body, so that the top 310 It can fit more closely with the syringe body.

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

According to another embodiment of the present invention, the accommodating space 321 and the rod 140 may also be in a non-spherical shape with corners, so as to effectively prevent the piston end 300 from spinning off from the piston arm 100 when the two are engaged. For example, the accommodating space 321 and the bar 140 may be in the shape of, for example, a rectangle, a triangle, or a hexagon. Thus, when the rod 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 engaged with it (as shown in FIG. separate.

Please refer to Figures 2A to 2C, wherein Figure 2A is a cross-sectional view of the fixing sleeve of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention, and Figure 2B is a cross-sectional view of a locking needle safety cover according to an embodiment of the present invention. A side view of the fixing sleeve of a disposable syringe with a safety cap, and FIG. 2C is a rear view of a fixing sleeve of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention.

The disposable syringe with a locking needle safety cover disclosed according to the embodiment of the present invention further includes a fixing sleeve 200 . According to an embodiment of the present invention, the fixing sleeve 200 is a tube that surrounds a portion of the piston arm 100 in FIG. 1A and the piston end 300 in FIG. 3A . Wherein, according to an embodiment of the present invention, the above-mentioned fixing sleeve 200 may have a plurality of sleeve ribs (sleeve rib) 225, and each sleeve rib 225 is formed from the outer surface of the tube body of the fixing sleeve 200 formed by extending outward.

According to an embodiment of the present invention, the inner side of the tube of the fixing sleeve 200 may be provided with grooves, angled or chamfered. Therefore, the user can easily remove or detach the protruding tip 330 or the piston end 300 of the piston assembly from the fixing sleeve 200 by virtue of this design.

As shown in FIG. 2A, in one embodiment, the fixing sleeve 200 includes an inner sleeve 230 and an outer sleeve 220, wherein the material of the inner sleeve 230 can be plastic, and the outer sleeve 220 The material may be, for example, a synthetic rubber (rubber), and the inner sleeve 230 is sheathed in the outer sleeve. There can be one or more sleeve tabs (sleeve tab) 235 on the inner sleeve 230, and the sleeve tabs 235 are used to engage between the inner and outer sleeves 230, 220 to prevent the inner sleeve 230 from contacting the outer sleeve. Relative sliding of the two occurs between the cylinders 220 .

According to the present invention, the inner sleeve 230 in 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 further be used to engage the fixing sleeve 200 with the syringe body, so as to prevent the fixing sleeve 200 from slipping out of the syringe body.

Next, please refer to FIG. 4A to FIG. 4F . Wherein, FIG. 4A is a cross-sectional view of a syringe body of a disposable syringe with a locking needle safety cover disclosed according to an embodiment of the present invention. 4B is a side view of a syringe body of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. 4C is a rear view of a syringe body of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. 4D is a cross-sectional view of a stop on a syringe body of a disposable syringe with a latching needle safety cover according to an embodiment of the present invention. 4E is a side view of a stop on a syringe body of a disposable syringe with a latching needle safety cover in accordance with an embodiment of the present invention. 4F is a rear view of a stop on a syringe body of a disposable syringe with a latching needle safety cover in accordance with an embodiment of the present invention.

The disposable syringe with a locking needle safety cover disclosed according to the embodiment of the present invention further includes a syringe body 400 . Wherein, the syringe body 400 includes a body tip (syringe body tip) 415, a body wall (syringe body wall) 410, a first body flange (body grasp flange) 450, and a stop block (sleeve stopper) 460. According to an embodiment of the present invention, a needle (not shown) can be disposed on the tip 415 of the body, which can be molded on the tip 415 of the body, so as to facilitate medical personnel or users to inject medicine into the patient's body.

In this embodiment, the first body flange 450 is formed by extending outwardly from the syringe body 400 of the syringe, which mainly assists medical personnel or users when administering the syringe. For example, when the user pulls back the piston assembly by means of the handle 110 , the user can choose to place his finger on the top of the first body flange 450 at the same time, so as to increase the force. As for when the user or the medical personnel pushes the piston assembly with the handle 110 , the user or the medical personnel can also choose to place their fingers under the first body flange 450 at the same time, so as to facilitate force application.

According to an embodiment of the present invention, as shown in FIG. 4D to FIG. 4F , the stop block 460 may further include a second body flange 451, which can be used to engage with the first body flange 450 of the syringe body 400 and the stopper. A sleeve stopper wall 461 prevents the fixing sleeve 200 of FIGS. 2A and 2B from withdrawing from the syringe body 400 .

According to the embodiment of the present invention, as shown in FIG. 4A , the syringe body 400 may further have one or more volume scales (markers), so that the user can know that the volume of the syringe contents has been How much volume of drug or solution to introduce.

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

Wherein, the front cap stop portion 486 forms a barrier around the syringe body 400 to prevent the safety cap from being pushed forward. On the other hand, the rear cap stopper 496 also forms a barrier around the syringe body 400 to prevent the safety cap from being pulled back.

The front support portion 487 is arranged around the syringe body 400 in a ring shape, so as to support the safety cover in a correct position when the syringe body 400 is pushed forward. On the other hand, the rear support portion 497 is also arranged around the syringe body 400 in a ring shape, so as to support the safety cover in a correct position when the syringe body 400 is pulled back.

In one embodiment, the syringe body 400 has a body channel 498 therein, and the body channel 498 is used to maintain and guide the locking needle safety cover to travel in the correct direction when advancing forward.

Next, please refer to FIG. 4G to FIG. 4I . Wherein, FIG. 4G is a cross-sectional view of a locking needle safety cover of a disposable syringe with a locking needle safety cover disclosed according to an embodiment of the present invention. 4H is a side view of a locking needle safety cover of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. 4I is a rear view of a locking needle safety cover of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention.

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

Wherein, 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 cover guide 530 is formed extending from the inner surface of the locking needle safety cover 500 . Moreover, the safety cover guide 530 can slide along the body channel 498 in the syringe body 400 in FIG. 4B , so as to control the movement of the locking needle safety cover 500 in the correct direction of travel, and at the same time, avoid locking the needle safety. The purpose of the cover 500 rotating freely.

According to an embodiment of the present 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. Generally speaking, before the syringe is used, the locking needle safety cover 500 is disposed around the injection needle 430 (refer to FIG. 5A, FIG. 5B ), so as to prevent users or medical personnel from accidentally touching the injection needle. As for, when the syringe is being used, the user can expose the above-mentioned injection needle 430 by pulling back the locking needle safety cover 500 and sliding it along the outer surface of the syringe body. In this case, the locking needle safety cover 500 is retracted, and at the same time, the injection needle 430 protrudes from the front opening 520 of the locking needle safety cover 500 for injection into the patient. After the syringe is used up, the user can move the locking needle safety cover 500 back to its original position to cover the needle 430 again, so as to prevent the needle 430 from touching the medical staff after the injection.

After that, the user can start to rotate and lock the needle safety cover 500 . When the locking needle safety cover 500 is rotated, the above-mentioned injection needle 430 contacts the needle engaging portion 555 of the needle lock 550 , and then is gradually bent towards the inside of the safety cover body 510 . When the injection needle 430 touches the bottom end of the needle engaging part 555, the injection needle 430 is bent into the needle engaging part 555. In this case, the injected injection needle 430 is engaged in the needle engaging part 555. In the combined part 555. It should be noted that once the injection needle 430 is engaged in the needle engaging portion 555 , the locking needle safety cover 500 disclosed in the embodiment of the present invention cannot be retracted for use again.

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

According to an embodiment of the present invention, the support ring 560 is disposed in the rear opening of the syringe body 400 . In addition, the support ring 560 may further include a release tab 565 . Therefore, when the support ring 560 is placed in the syringe body 400, the release piece 565 can protrude from the release opening 540 of the locking sleeve safety cover 500 in FIG. 4G.

Please refer to FIG. 5A to FIG. 5E , and FIG. 6A to FIG. 6H . 5A is a cross-sectional view of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention, FIG. 5B is a side view of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention, and FIG. Rear view of a disposable syringe with a latching needle safety cap of an embodiment of the invention. 5D and 5E are cross-sectional views of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. 6A to 6H are schematic diagrams of various stages in the use of a disposable syringe with a locking needle safety cover according to an embodiment of the present invention. For the following description, please also refer to the aforementioned FIG. 1A to FIG. 4L , and the detailed description is as follows.

Firstly, as shown in FIG. 5A to FIG. 5E , which are the overall schematic diagrams of the disposable syringe 10 with a locking needle safety cover of the present invention before use. According to an embodiment of the present invention, the disposable syringe 10 with a locking needle safety cover includes a piston assembly, a fixing sleeve 200 , and a syringe body 400 . Wherein, the above-mentioned piston assembly includes: a piston arm 100 and a piston end 300 , and the above-mentioned fixing sleeve 200 is disposed in the syringe body 400 .

According to an embodiment of the present invention, the plunger end 300 is located on the front end inside the syringe body 400 . The rod 140 of the piston arm 100 is engaged in the accommodating space 321 of the base 320 of the piston end 300 . The fixing sleeve 200 is disposed around the protruding tip 330 of the piston end 300 , and makes the protruding tip 330 abut against the tip flange 122 , thereby fixing the piston end 300 and the piston arm 100 together.

In detail, as shown in FIGS. 6A to 6B, when the user pulls back the piston arm 100 through the handle 110, in this case, since the tip flange 122 in FIG. 1C can be engaged with the protruding tip 330, the Therefore, the piston end 300 is fixed with the piston arm 100 of FIG. 1A while being pulled back (ie, toward the downward direction in 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.

When the fixing sleeve 200 moves backward in the syringe body 400 , the sleeve rib 225 of the fixing sleeve 200 contacts the body wall 410 of the syringe body 400 . It should be noted that, according to the embodiment of the present invention, once the fixed sleeve 200 moves backward, the frictional force between the sleeve rib 225 located thereon and the body wall 410 of the syringe body 400 will be relatively large, As a result, the fixing sleeve 200 cannot move forward again (that is, to the upward direction as shown in the figure). In other words, the sleeve rib 225 is designed to prevent the fixing sleeve 200 from being pushed forward, but it can still be pulled backward.

After that, if the user continues to pull back the piston arm 100 , the fixing sleeve 200 will continue to be pulled back along with the piston assembly (including the piston arm 100 and the piston end 300 ).

When the fixing sleeve 200 retreats to the bottom opening of the syringe body 400, the stop block 460 on the syringe body 400 will resist the fixing sleeve 200, so that the fixing sleeve 200 cannot continue to move backward. In other words, the stop block 460 prevents the fixing sleeve 200 from withdrawing from the syringe body 400 .

In this case, as shown in Figure 6C, the fixed sleeve 200 is restricted and cannot move forward or backward again, because the fixed sleeve 200 is blocked by the stop block 460, so it cannot continue to move backward. move. Moreover, the fixing sleeve 200 is also unable to move forward again due to the design of the sleeve rib 225 .

Please refer to FIG. 6D for further information. Since the fixed sleeve 200 has been restricted at this time, it cannot move forward or backward. Therefore, if the user continues to push the handle 110 , 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 fixing sleeve 200 . Furthermore, when the protruding tip 330 leaves the sleeve range of the fixing 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, even so, the piston end 300 can continue to move forward continuously by being pushed by the rod 140 and the protruding tip 330 in contact with it.

As shown in FIG. 6E , when the piston assembly is pushed forward all the way, the piston end 300 will finally be resisted by 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. separate.

Therefore, when the piston end 300 and the piston arm 100 are separated, the piston arm 100 cannot be combined with the piston end 300 again. In other words, as shown in FIG. 6G and FIG. 6H , the disposable syringe 10 with a locking needle safety cap proposed by the present invention cannot be reused again.

In detail, once the protruding tip 330 retreats out of the sleeve range of the fixing sleeve 200 , the piston end 300 starts to separate from the piston arm 100 . Moreover, the piston end 300 and the piston arm 100 cannot be combined again. Therefore, the user can no longer actuate the piston end 300 at the same time 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 reading the use indicator 123 .

Secondly, in order to expand the practical application level of the present invention, the product designer can more selectively rely on arranging a plurality of sleeve ribs 225 to control the amount of medicine to be injected by the syringe. For example, if the amount of medicine to be introduced into the syringe corresponds to 25% of the tube volume of the syringe body, then the sleeve rib 225 can be selected to be arranged at a place corresponding to 25% of the tube volume of the fixed sleeve 200 . Again, if the required amount of medicine introduced by the syringe corresponds to 50% of the tube volume of the syringe body, then another sleeve rib 225 should be arranged at a place corresponding to 50% of the tube volume of the fixed sleeve 200 to control the volume of the fixed sleeve. The barrel 200 cannot be pushed back forward again after reaching the place where the sleeve rib 225 is located, 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 with a locking needle safety cap of the present invention is completed, the plunger arm 100 can be removed from the syringe body 400, and the plunger arm 100 cannot be engaged with the plunger end again, Therefore, the present invention effectively achieves the goal of ensuring that the syringe can only be used once, and effectively avoids various problems that may arise from common needle sharing.

To sum up, in order to enable your examiner to further understand the technology, means and effects of the present invention to achieve the intended purpose, the above is the detailed description and drawings of the present invention. I believe that the purpose, characteristics and characteristics of the present invention , when a deep and specific understanding can be obtained from this, however, the attached drawings and the above examples are only provided for reference and illustration to explain the technical idea of the present invention, and are not used to limit the present invention.

In the disposable syringe with a locking needle safety cover disclosed by the present invention, the protruding tip is configured on the piston end, and the tip flange is configured on the piston arm. When the fixing sleeve is arranged around the protruding tip, the piston arm and the piston end can be fixed together by virtue of the mutually engaged protruding tip and the tip flange. If the user continues to push the piston arm so that the protruding tip is pushed out from the fixed sleeve, the piston end and the piston arm will start to separate. Thus, the invention achieves the effect of ensuring that the syringe can only be used once.

The above-described embodiments are only to illustrate the technical ideas and characteristics of the present invention, and its purpose is to enable those who are familiar with this art to understand the content of the present invention and implement it accordingly, and should not limit the patent scope of the present invention, that is, All equivalent changes or modifications made according to the spirit disclosed in the present invention should still fall within the patent scope of the present invention.

Claims (20)

1. A disposable syringe with a locking needle safety cover, characterized in that it comprises: a piston arm; a piston end; a fixing sleeve is arranged around a portion of the piston arm and the piston end; a syringe body for accommodating the plunger arm, the plunger end and the retaining sleeve, wherein when a user first pulls back the plunger arm and then advances the plunger arm, the plunger end will be disengaged from the retaining sleeve the sleeved extent of while allowing the piston end to separate from the piston arm; and A locking needle safety cover is arranged outside the syringe body. When the user rotates the locking needle safety cover, an injection needle of the disposable syringe engages in the locking needle safety cover to prevent the locking needle safety cover from is retracted again for use. 2 . The disposable syringe with locking needle safety cap as claimed in claim 1 , wherein the piston end has at least one protruding tip, and the protruding tip engages with a tip flange on the piston arm. 3 . 3. The disposable syringe with locking needle safety cover according to claim 1, characterized in that, the outer surface of the fixing sleeve has at least one sleeve rib, and the sleeve rib restricts the fixing sleeve from being closed. Push forward. 4. The disposable syringe with a locking needle safety cover as claimed in claim 1, wherein the fixing sleeve comprises: an inner sleeve made of plastic; and A sleeve is made of synthetic rubber. 5. The disposable syringe with a locking needle safety cover as claimed in claim 1, wherein the syringe body further includes a stopper, and the stopper is used to prevent the fixing sleeve from coming out of the syringe body. quit. 6. The disposable syringe with a locking needle safety cap as claimed in claim 1, wherein the plunger arm has a use indicator for displaying whether the syringe has been used. 7. The disposable syringe with a locking needle safety cover as claimed in claim 1, wherein the piston arm further comprises a rod, and the piston arm is locked by the rod inserted in the piston end. fit over the piston end. 8 . The disposable syringe with a locking needle safety cap as claimed in claim 7 , wherein the rod member and the piston end are arranged corresponding to each other, so as to prevent the piston end from spinning off from the piston arm. 8 . 9. A disposable syringe with a locking needle safety cover, comprising: a piston end having at least one protruding tip; a piston arm snapped to the piston end by means of the at least one protruding tip; a fixing sleeve surrounding the protruding tip disposed on the piston end; a syringe body for containing the plunger arm, the plunger end and the retaining sleeve; and A locking needle safety cover is arranged outside the syringe body. When a user rotates the locking needle safety cover, an injection needle of the disposable syringe engages in the locking needle safety cover to prevent the locking needle safety cover from is retracted again for use. 10. The disposable syringe with a locking needle safety cover as claimed in claim 9, wherein the fixing sleeve has at least one sleeve rib, and the sleeve rib restricts the fixing sleeve from being pushed forward . 11 . The disposable syringe with locking needle safety cap as claimed in claim 9 , wherein the plunger end is located in the syringe body before and after use of the disposable syringe with locking needle safety cap. 12 . 12 . The disposable syringe with a locking needle safety cover as claimed in claim 9 , wherein the fixed tip is separated from the plunger arm after the fixed tip leaves the sleeve range of the fixed sleeve. 13 . 13. The disposable syringe with a locking needle safety cover as claimed in claim 9, wherein the syringe body further comprises a stopper for preventing the fixing sleeve from withdrawing from the syringe body. 14. The disposable syringe with a locking needle safety cap as claimed in claim 9, wherein when the user first pulls back the plunger arm and then pushes the plunger arm, the fixed tip on the plunger end Leave the set range of the fixed sleeve. 15. The disposable syringe with a locking needle safety cap as claimed in claim 9, wherein the plunger arm has a use indicator for displaying whether the syringe has been used. 16. A disposable syringe with a locking needle safety cap, comprising: a piston arm; a piston end having at least one protruding tip to engage the piston arm by means of the protruding tip: A fixing sleeve, having at least one set of sleeve ribs, when the protruding tip is engaged with the piston arm, the fixing sleeve is arranged around the protruding tip; a syringe body containing the piston arm, the piston end and the fixed sleeve, with a stopper on the syringe body, the stopper is used to prevent the fixed sleeve from exiting the syringe body; and A locking needle safety cover is arranged on the outside of the syringe body. When a user rotates the locking needle safety cover, an injection needle of the disposable syringe engages in the locking needle safety cover to prevent the locking needle safety The cover is retracted again for use. 17 . The disposable syringe with locking needle safety cap as claimed in claim 16 , wherein the plunger end is located in the syringe body before and after use of the disposable syringe with locking needle safety cap. 18 . 18. The disposable syringe with a locking needle safety cover as claimed in claim 16, wherein the fixed tip is separated from the plunger arm after the fixed tip leaves the sleeve range of the fixed sleeve. 19. The disposable syringe with a locking needle safety cover as claimed in claim 16, wherein the syringe body further comprises a stopper for preventing the fixing sleeve from exiting the syringe body. 20. The disposable syringe with a locking needle safety cap as claimed in claim 16, wherein when the user pushes the plunger arm, the fixed tip on the piston end leaves the sleeve of the fixed sleeve scope.

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