TWI641401B - Safety needle and safety needle device - Google Patents

Abstract

A safety needle device and a safety needle device comprising the safety needle, an outer cover and a sealing film, the outer cover sealingly packaging the safety needle with a sealing film, the safety needle comprising a needle sleeve and a syringe a set of sockets, a lancet and a safety cover, the syringe set is arranged at the rear end of the needle sleeve, the lancet is inserted in the needle sleeve and the syringe set socket, and the safety cover is telescopically and rotatably assembled In the needle casing, and using the anti-reverse guiding groove of the needle casing in the needle casing to guide the needle sheath of the needle of the safety cap, so that the safety cap can be in the axial direction of the needle casing The telescopic movement and the timing of controlling the lancet to extend the safety cap, and after use, the safety cap on the outside of the lancet can be locked in the needle casing by the anti-reciprocal elastic piece, so that the safety needle can no longer be used, ensuring its Use security.

Description

Safety needle and safety needle device

The present invention relates to a safety needle, and more particularly to a safety needle and a safety needle device for connecting an injection needle front end for injection.

In order to reduce the risk of infection of a medical staff accidentally being pinned, the invigilator must use the safety needle during the injection of the medicament by the medical staff. A conventional safety needle assembly includes a needle member having a lancet and a lancet outer cover that is sleeved on the outside of the lancet member. When the safety needle is in use, the connecting portion of one end of the needle member is sleeved on the front end of the needle barrel, and when the needle is not injected, the needle outer cover is sleeved on the outer side of the needle member to prevent the needle from being inserted.

However, the safety needle can provide safety protection by arranging the outer cover of the needle on the outer side of the needle member. However, during the transportation or operation of the safety needle, the outer cover of the needle is difficult to effectively prevent the insertion of the needle. Moreover, the conventional safety needles are difficult to distinguish between before and after use, and the medical personnel have misused the possibility of using a safety needle.

In order to overcome the above-mentioned problems of insufficient safety of the safety needle and the inability to discriminate whether it has been used or not, the existing safety needle product design has the functions of safety protection and discrimination, and the existing safety needle is attached to the needle housing. A lance is inserted into the front end, and an outer cover is disposed at the front end of the needle housing. The outer cover is inserted into the needle housing with the lancet sleeve and the elastic body, and the guide block at the rear end of the lance sleeve extends into the locking guide of the needle housing. In the slot, the guiding effect of the straight slot section, the guiding slot section and the locking slot section in the locking guiding slot on the guiding block at the rear end of the lancet sleeve is used, after the safety needle is combined with the syringe, before the injection, the outer cover is The lancet sleeve is arranged on the outer side of the lancet. When the injection, the lancet sleeve can be retracted into the needle housing to expose the lancet. After the injection, the lancet sleeve is pushed by the elastic force of the elastic body from the front end of the needle housing and covered on the outer side of the lancet. At the same time, the guide block at the rear end of the lancet sleeve is moved along the locking guide groove to the locking position of the locking groove segment, so that the locked lancet sleeve can no longer be retracted into the needle housing, ensuring that the lancet is covered by the lancet Internal needle guard, the safety needle can no longer be used, and according to the difference between the safety needle has been used.

However, the existing safety needle can provide safety protection and distinguish whether the safety needle has been used. However, the safety needle uses the locking guide groove in the needle housing to include the configuration of the straight groove section, the guiding groove section and the locking groove section. The guiding function of the guide block at the rear end of the lancet sleeve can not provide a non-return function to the guide block when the guide block at the rear end of the lancet sleeve moves along the locking guide groove to the locking position of the locking groove segment, and the lancet sleeve may still have an external force. Reverse movement, the safety needle still has the problem of insufficient locking performance and safety protection.

The main object of the present invention is to provide a safety needle and a safety needle device, which solve the problems of insufficient locking performance and insufficient safety of the existing safety needle.

In order to achieve the foregoing object, the safety needle of the present invention comprises: a needle casing comprising a casing and a lancet assembly, the casing comprising an active space and a casing wall located at a periphery of the movable space. The rear end of the outer wall of the outer casing has a rear end plate portion. The lancet joint portion is disposed in the movable space of the outer casing and protrudes forward from the front end of the rear end plate. The lancet joint portion forms an axis with the rear end plate. Providing a hole to the penetrating lance, the casing forming at least one backstop groove, the backstop groove comprising an initial segment, a locking segment, an end segment and a guiding chute segment, the starting segment being located a front section of the housing, the locking section is located at a front section of the housing and located at a side of the starting section, the end section is located at a rear section of the housing, and the rear end of the starting section is connected to a middle section of the end section, the guiding chute The segment is connected between the locking segment and the front segment of the end segment, and the end segment forms a forwardly protruding anti-reciprocal elastic piece with respect to the other side of the starting segment, the front end of the anti-reciprocating elastic piece is free end and extends forward To the rear side of the locking section and on the side of the guiding chute section; a syringe set socket is disposed at a rear end of the needle sleeve; a lancet is inserted into the lancet mounting hole of the lancet joint portion of the needle sleeve, and the anterior segment of the lancet protrudes outside the front end of the needle sleeve a rear end of the lancet extending into the syringe assembly; and a safety cover that is axially telescopically and rotatably mounted in the needle casing, the safety cover including a needle sheath and a positioning end And an elastic body connected between the needle sheath and the positioning end, the positioning end is located in the movable space of the needle casing and is connected to the rear end plate portion, and the elastic body is sleeved on the outer side of the lancet joint, the needle The sheath includes an axially penetrating pinhole, and the rear end of the needle sheath forms at least one needle sheath buckle, and the needle sheath spring buckle is correspondingly inserted into the anti-reverse guiding groove of the needle casing, and the needle sheath buckle The safety cap can be telescopically moved in the axial direction of the needle casing by guiding the anti-backlash groove, and the needle can be extended to extend the safety cover and the safety cover can be locked in the needle casing. .

In the safety needle as described above, the inner side wall of the front end of the housing of the needle casing is provided with at least one L-shaped inner slide, and the L-shaped inner slide extends rearward from the front port of the housing to the end. The position of the initial section of the reverse guide groove, the needle-sheath snap fastener at the rear end of the needle sheath of the safety cover can be rotated from the front end of the needle sleeve along the L-shaped inner slide into the initial section of the anti-reverse guide groove to make the elastic The body produces a pre-compressed rotational force.

In the safety needle as described above, the front end surface of the end plate portion of the needle casing forms a two-radial symmetrical fan-shaped groove with respect to the periphery of the lancet joint portion, and the rear portion of the casing is formed between the check reverse groove and the rear end plate portion. At least one through slot, the groove wall forming a rearwardly projecting elastic hook, the elastic hook is located at a front side of the positioning end of the safety cover; the connection pin and the positioning end of the safety cover The elastic body between the portions is formed in a spiral shape, and the rear end surface of the positioning end portion forms two limiting protrusions, and the two limiting protrusions respectively protrude into the two fan-shaped grooves of the rear end plate portion of the needle casing The scalloped groove limits a range of rotation angles of the safety cover.

In the safety needle as described above, the anti-reverse groove of the housing forms a slot for connecting the locking segment with respect to the other side of the end segment, and the front end of the anti-back spring is formed with abutting end. unit.

In the safety needle as described above, the lancet is combined with a lancet positioning plug in the lancet joint of the needle casing, and the lancet rear end is combined with a lancet fixing plug in the syringe set.

In the safety needle as described above, the back side of the end sleeve portion of the needle sleeve is formed on a side of the back of the lancet mounting hole to form a rearwardly projecting aligning projection, the syringe assembly having an opening facing rearward a seat body having a front plate portion and a joint pipe portion projecting from a front end surface of the front plate portion, the syringe group seat forming an axial through hole in the joint pipe portion and the front plate portion a lancet through hole, the combined tube portion is disposed in the rear end plate portion of the needle casing and the lancet joint portion, the front plate portion forming a pair of recessed portions, the aligning recess portion and the needle end shell rear end plate Correspondingly, the spurt joint of the needle sleeve forms a snap ring groove in the hole wall of the lancet mounting hole, and the outer peripheral wall of the joint tube portion of the syringe set joint forms a snap flange. The snap flange is combined with the snap ring groove.

In order to achieve the foregoing, the present invention further provides a safety needle device comprising: a safety needle as described above; an outer cover, a hollow body having a front end and a rear end and a port having a port, the outer cover The sleeve is disposed outside the safety needle; and a film is sealed at the port at the rear end of the outer cover to seal the safety needle in the outer cover.

In the safety needle device as described above, at least one axially extending rib-shaped convex portion is formed in the inner side wall of the front end of the outer cover, and the inner side wall of the outer cover adjacent to the port forms at least one engaging convex portion; The outer peripheral surface of the needle sheath forms at least one axially extending fitting groove, and the fitting groove can be engaged with the rib-shaped convex portion in the inner side wall of the outer cover, and the outer peripheral surface of the syringe connecting seat forms an L-shaped outer sliding surface The outer cover can be positioned by the card abutting protrusion along the outer slide.

In the safety needle device as described above, the rear end of the outer cover further forms a radially protruding ring flange, and the ring flange provides a portion where the sealing film is fixed.

The main feature of the safety needle is that the safety needle is threaded through the needle sleeve and the rear needle assembly, and the safety cover is telescopically and rotatably assembled to the needle sleeve. In the shell, the housing of the needle casing is further provided with a reverse guiding groove with a stop-shaped elastic piece, and the needle-sheath buckle of the needle sheath of the safety elastic cover can extend into the anti-reverse guiding groove and pass through the anti-reverse with the anti-reverse elastic piece The guide groove guides the needle sheath of the needle cover of the safety cover, so that the safety cover can extend and contract in the axial direction of the needle cover, and can control the timing of the needle extending from the safety cover and is in use After that, the needle sheath of the safety cover is covered by the elastic cover provided by the elastic body on the outer side of the needle, and the needle sheath is buckled through the anti-reciprocal elastic piece, the guiding chute section enters the locking section, and the anti-reverse elastic piece is used in the needle. The sheath spring buckle abuts the limit so that the needle sheath of the safety cover cannot move backwards backwards, so that the safety cover is completely locked in the needle casing, and the safety needle can no longer be used to ensure the safety of use. .

In addition, the safety needle of the present invention can further utilize at least one L-shaped inner slideway on the inner side wall of the front end of the housing of the needle sleeve, the L-shaped inner slide extending rearward from the front port of the housing to the vicinity. The position of the initial section of the anti-backstop groove, the needle-sheath buckle of the rear end of the needle sheath of the safety cap can be rotated from the front end of the needle casing along the L-shaped inner slide into the initial section of the anti-reverse channel To cause the elastomer to produce a pre-compressed rotational force.

The safety needle device of the invention has the above-mentioned features in addition to the safety needle, and the safety needle device can also seal the safety needle with the outer cover and the sealing film to ensure that it meets the safety and hygiene specifications, and at the same time, utilizes The outer cover is sleeved on the outer side of the safety needle. During the process of connecting the syringe to the safety needle, the user does not need to touch the safety joint at all, and the safety needle is extracted from the outer cover through the syringe before the injection.

Furthermore, the safety needle device of the present invention can also be sleeved on the outer side of the safety needle and the inner side wall of the rear end of the outer cover in a state in which the syringe set base and the outer cover of the safety needle are not separated. The card abutting portion is fastened to the L-shaped outer slide rail of the outer peripheral wall of the syringe assembly, and the rib-shaped convex portion of the inner side wall of the front cover of the outer cover is located in the fitting groove of the needle sheath of the safety cover, so that the safety needle is It is fixed in the outer cover, and the needle-sheath buckle of the safety cover has not passed through the L-shaped inner slide of the needle casing and stops in the initial section of the reverse guide groove, so that the safety needle device can be effectively prevented from being wrong due to the starting position. And failed. Before the injection of the safety needle device, the outer cover sleeved on the outer side of the safety needle is rotated, so that the card abutting portion of the inner side wall of the rear end of the outer cover slides from the L-shaped outer side of the outer peripheral wall of the syringe connection seat at the rear end of the safety needle. The detachment of the tract disengages the safety needle from the outer casing.

On the other hand, the safety needle device of the present invention can rotate the needle sheath of the safety cover by the rib-shaped convex portion of the inner side wall of the front end of the outer cover, so that the needle sheath of the rear end of the needle sheath is along the side wall of the front end of the needle casing. The in-form slide enters the initial section of the anti-reverse guide groove of the needle casing, and the action can prevent the positioning end of the safety cover from moving, and the needle sheath rotates to achieve the elastic force and the direction of the elastic body due to rotation and compression. The pre-force of the maneuver.

The present invention comprises a safety needle and a safety needle device. As shown in Figures 1 and 2, a preferred embodiment of the safety needle device 1 of the present invention is disclosed. As shown in Figure 3, the safety needle 10 of the present invention is disclosed. A preferred embodiment. The safety needle 10 of the present invention can be individually sealed and packaged to ensure its safety and hygiene. Alternatively, the safety needle 10 can also be applied to the safety needle device 1 shown in FIG.

As shown in FIGS. 1 and 2, the safety needle device 1 includes a safety needle 10, an outer cover 60, and a film 70. The outer cover 60 is a hollow body having a front end and a rear end having a port, and is sleeved on the outer side of the safety needle 10. The port at the rear end of the outer cover 60 seals the sealing film 70, and the safety needle 10 is installed. Sealed.

In a preferred embodiment of the safety needle device 1 shown in FIG. 2, at least one axially extending rib-shaped projection 61 is formed in the inner side wall of the front end of the outer cover 60, and the rear end of the outer cover 60 is adjacent to the port. The inner side wall forms at least one snap-in convex portion 62, and the rib-shaped convex portion 61 and the latching convex portion 62 are used to fix the safety needle 10. The rear end of the outer cover 60 further defines a radially protruding ring flange 63, and the ring flange 63 provides a portion where the sealing film 70 is fixed.

In the preferred embodiment of the safety needle 10 shown in FIGS. 3-7, the safety needle 10 includes a needle housing 20, a syringe assembly 40, a needle 30, and a safety cover 50, or further includes A needle positioning plug 31 and a needle fixing plug 32 are provided.

As shown in FIG. 3 to FIG. 10, the needle casing 20 includes a casing 21 and a lancet joint 22, and the casing 21 includes a movable space 211 and a casing wall 212 at the periphery of the movable space 211. A front port 213 is formed at the front end of the housing wall 212. The rear end of the housing wall 212 defines a rear end plate portion 214. The lancet joint portion 22 is disposed in the movable space 211 of the housing 21 and is from the rear end plate. The front end of the portion 214 extends forwardly to the front port 213. A lancet attachment hole 221 is formed in the lancet joint portion 22 and the rear end plate portion 214 so as to penetrate in the front-rear direction. The lancet joint portion 22 forms a snap ring groove 222 in the rear wall of the lancet mounting hole 221 .

As shown in FIG. 7 and FIG. 10, in the needle casing 20, a side of the rear end plate portion 214 on the back side of the lancet mounting hole 221 forms a rearwardly projecting aligning projection 2141. The front end surface of the rear end plate portion 214 forms a two-radially symmetrical fan-shaped groove 2142 with respect to the periphery of the lancet joint portion 22.

As shown in FIG. 3 to FIG. 9, in the needle casing 20, the casing 21 forms at least one anti-backstop groove 23. In the preferred embodiment, the casing 21 forms a diametrically opposite anti-reverse guide. The slot 23 includes a starting section 231, a locking section 232, an ending section 233, and a guiding chute section 234. The starting section 231 is located at a front section of the housing 21, and the locking section The 232 is located at a front portion of the housing 21 and is located at a side of the starting portion 231. The end portion 233 is located at a rear portion of the housing 21 and is located at a side of the starting portion 231 to communicate with each other. The guiding chute segment 234 is connected. Between the front section of the locking section 232 and the front section of the end section 233, the rear section of the starting section 231 forms an arcuate shape and communicates with the middle section of the end section 233, the end section 233 being formed with respect to the other side of the starting section 231 a front end projecting elastic piece 235, the front end of which is a free end and extends to the rear side of the locking portion 232 and is located on the side of the guiding chute section 234. In the preferred embodiment, The housing 21 forms a slot 236 connecting the locking segment 232 on the other side of the anti-reciprocal spring 235 with respect to the end segment 233. The anti-reciprocal spring 235 The front end forms abutting end 2351.

As shown in FIG. 5 and FIG. 6, the housing 21 is further provided with at least one L-shaped inner slide 215 on the inner side wall of the front end thereof, and the L-shaped inner slide 215 extends rearward from the front port 213 to the end stop guide. The position of the beginning section 231 of the slot 23.

As shown in FIG. 3 to FIG. 9 , in the needle casing 20 , the rear portion of the casing 21 forms at least one through groove 24 between the backstop groove 23 and the rear end plate portion 214 , and the through groove 24 . The outer peripheral surface of the casing 21 is radially penetrated to communicate with the movable space 211. Before the through-groove 24, the groove wall forms a resilient hook 25 protruding rearward. In the preferred embodiment, the rear portion of the housing 21 defines two radially corresponding slots 24 having spring hooks 25. The position of each of the hooks 25 corresponds to between the two anti-backstop grooves 23.

As shown in FIG. 6 and FIG. 7, the syringe assembly 40 is provided with a rear end of the needle casing 20 for connecting a syringe. In the preferred embodiment, the syringe assembly 40 includes a seat 41 having an opening rearward. The front end of the base 41 has a front plate portion 42 and a combined tube portion projecting from the front end surface of the front plate portion 42. The syringe assembly 40 forms an axially extending lancet through hole 44 in the coupling tube portion 43 and the front plate portion 42 and is disposed through the coupling tube portion 43 at the rear end plate of the needle casing 20 In the nip portion 214 and the lancet joint portion 22, a front end surface of the front plate portion 42 forms a pair of recessed portions 421 that are mated with the aligning projections 2141 of the end plate portion 214 of the needle casing 20. The outer peripheral wall of the joint pipe portion 43 forms a snap flange 431, and the snap flange 431 is engaged with the snap ring groove 222 in the lancet joint portion 22. The inner peripheral wall of the seat body 41 may further form a ridge for assembling the fixed syringe. The outer peripheral wall of the base body 41 can also form at least one aligning combination of the card abutting projections 62 of the rear inner side wall of the outer cover 60 by the L-shaped outer slide 411 extending to the rear.

As shown in FIG. 5 to FIG. 10, the lancet 30 is combined with the lancet positioning plug 31 in the lancet mounting hole 221 of the lancet joint portion 22 of the needle casing 20, and the anterior segment of the lancet 30 protrudes from the needle casing 20 On the outer side of the front end, the rear end of the lancet 30 passes through the lancet through hole 44 of the syringe set holder 40 into the seat body 41. In the preferred embodiment, the lancet is combined with the lancet positioning plug 31 in the lancet joint portion, and the lancet fixing plug 32 is mounted in the lancet through hole 44 of the syringe set socket 40. The lancet fixing plug 32 is provided. The lancet 30 is fixed in the lancet joint 22 and the syringe set socket 40 through the rear portion of the lancet 30.

As shown in FIG. 5 to FIG. 10 , the safety cover 50 is movably and rotatably mounted in the needle casing 20 , and the safety cover 50 can cover the lance 30 to make the lance 30 before use. Without being exposed, during use, the safety cover 50 can be retracted into the needle casing 20 such that the needle 30 extends beyond the front end of the safety cover 50. After use, the safety cover 50 covers the needle 30 and The safety cover 50 can be locked in the needle casing 20.

As shown in FIG. 5 to FIG. 7 and FIG. 10, the safety cover 50 includes a needle sheath 51, an elastic body 52, and a positioning end portion 53. The needle sheath 51 is spaced back and forth from the positioning end portion 53. The elastic body is disposed. 52 is connected between the rear end of the needle sheath 51 and the front end of the positioning end portion 53. The positioning end portion 53 is disposed in the movable space 211 of the needle casing 20 and is connected to the rear end plate portion 214, and the elastic hook 25 of the rear portion of the needle casing 20 is located at the front side of the positioning end portion 53 for limiting. The rear end surface of the positioning end portion 53 defines two limiting protrusions 54 extending into the two sector slots 2142 of the rear end plate portion 214 of the needle casing 20, respectively. The angular range of rotation of the safety cover 50 is restricted by the sector groove 2142.

As shown in FIG. 5 to FIG. 7 and FIG. 10, the elastic body 52 can be deformed in the axial length. In the preferred embodiment, the elastic body 52 is formed in a spiral shape, and the elastic body 52 is sleeved on the lancet joint portion. The outer side of the housing 22 allows the needle sheath 51 of the safety cover 50 to be telescopically and rotationally moved at the front end of the housing 21 of the needle casing 20. The needle sheath 51 includes an axially extending pinhole 511, and the outer peripheral surface of the needle sheath 51 forms at least one axially extending fitting groove 512, and the fitting groove 512 can be combined with the rib in the inner side wall of the outer cover 60. The convex portion 61 is convexly fitted. The outer peripheral surface of the rear end of the needle sheath 51 further forms at least one needle sheath buckle 55, and the needle sheath buckle 55 is correspondingly inserted into the anti-reverse channel 23 of the needle casing 20, by means of the anti-reverse channel 23 The guiding action of the needle-and-sheel buckle 55 enables the safety cap 50 to be rotated and locked in a limited angular range during the axial telescopic movement of the needle casing 20.

As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 11, before the safety needle device 1 of the present invention is used, the safety needle 10 is installed in the outer cover 60 and sealed with a sealing film 70 to the outer cover. The rear end of the 60 allows the safety needle 10 to be sealed to prevent contamination and to ensure safe and hygienic use of the safety needle 10. When the safety needle device 1 is to be assembled to the syringe 80, the sealing film 70 is first peeled off, and the front end of the syringe 80 is inserted into the safety needle 10 located in the outer cover 60 to assemble the syringe assembly 40. The rear end of the lancet 30 extends into the syringe 80. Therefore, during the assembly of the syringe 80 and the safety needle 10, the outer cover 60 can still be sleeved on the outer side of the safety needle 10, and the card on the inner side wall of the rear end of the outer cover 60 The abutting projection 62 is engaged with the L-shaped outer slide 411 of the outer peripheral wall of the syringe assembly 40, and the outer cover 60 is located at the assembly of the needle sheath 51 of the safety cover 50 with the rib-shaped projection 61 of the inner side wall of the front end thereof. In the recess 512, the safety needle 10 is fixed in the outer cover 60 to ensure the safety of the operation. Moreover, in a state where the syringe set 40 and the outer cover 60 of the safety needle 10 are not separated, the needle sheath snap 55 of the safety cover 50 has not yet entered the initial section 231 of the check groove 23 of the needle casing 20. In this case, the safety needle device 1 is prevented from failing due to an incorrect starting position. At the same time, the needle sheath 51 of the safety cover 50 is sleeved on the outer side of the lancet 30, so that the lancet 30 is not exposed, and the safety cover 50 is further utilized for providing safety protection. In this way, during the operation before the transportation and the injection, the outer protective cover 60 and the safety cover 50 provide double safety protection for the lancet 30, so as to prevent the possibility that the lancet 30 of the safety needle 10 is inserted, and accordingly It is distinguished that the safety needle 10 has not been used.

Please refer to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 11 , before the injection, rotate the outer cover 60 sleeved on the outer side of the safety needle 10 so that the inner side wall of the rear cover 60 abuts the convex portion. 62. The L-shaped outer slide 411 of the outer peripheral wall of the syringe connector 40 at the rear end of the safety needle 10 is disengaged. On the other hand, the needle sheath 51 of the safety cover 50 is driven by the rib-shaped convex portion of the inner side wall of the front end of the outer cover 60. Rotating so that the needle sheath snap 55 at the rear end of the needle sheath 51 enters the initial section 231 of the anti-reverse channel 23 of the needle casing 20 along the L-shaped inner slide 215 of the front end side wall of the needle casing 20, thereby The positioning end portion 53 of the safety cover 50 is moved, and the needle sheath 51 is rotated to achieve the pre-stress of the elastic body 52 to increase its elastic force and obtain a direction of rotation due to rotation and compression.

As shown in FIG. 11 and FIG. 12, at the time of injection, the medical staff holds the syringe and extends the front end of the safety cover 50 of the safety needle 10 toward the predetermined injection portion of the injected person. In the process, the safety needle 10 is The needle sheath 51 of the safety cap 50 still covers the needle 30, ensuring safety. Until the front end of the safety cover 50 contacts the skin of the injected person, the push rod of the syringe 80 is pressed, and the safety cover 50 is pressed to compress the elastic body 52, thereby retracting the needle sheath 51 to the shell of the needle casing 20. In the body 21, the lancet 30 is extended outside the distal end of the needle sheath 51 of the safety cap 50, and is inserted into the body of the injected person to inject the drug into the subject. During this process, the needle sheath 51 of the safety cap 50 is moved rearward along the starting section 231 from the front end of the starting section 231 of the anti-reverse channel 23 of the needle casing 20 by the needle sheath buckle 55 at the rear end. The arcuate rear section of the initial section 231 is obliquely guided to the end point section 233, the safety elastic cover 50 is deflected by an angle and the needle sheath 51 compresses the elastic body 52 to contract, and the push rod of the syringe 80 can be continuously pressed. The medicament in the syringe 80 is injected into the body of the subject through the needle 30.

As shown in FIG. 12 and FIG. 13, after the medicine in the syringe 80 is injected into the body of the injecting body, the needle barrel 80 is pulled back, and the needle 30 of the safety needle 10 at the front end of the barrel 80 is pulled away from the body of the injecting person. At this time, the safety cover 50 provides an elastic force by the elastic body 52, and the needle sheath 51 is ejected from the front end of the needle casing 20, so that the lancet 30 is covered in the needle sheath 51 of the safety cover 50. Wherein, when the needle sheath 51 of the safety cover 50 is pushed forward by the elastic force of the elastic body 52, the needle sheath buckle 55 at the rear end of the needle sheath 51 follows the end point of the reverse guide groove 23 of the needle casing 20. The segment 233 moves forward, and then pushes the anti-reciprocal elastic piece 235 and rotates into the locking section 232 along the guiding chute section 234. The needle sheath 51 of the safety elastic cover 50 is pressed against the anti-reciprocal elastic piece 235 by the needle-sheath buckle 55. The limit position is locked in the position of the locking section 232 of the needle casing 20, so that the needle sheath 51 cannot be reversely moved, and at the same time, the needle 30 is completely covered by the needle sheath 51 of the safety cover 50, the safety needle device 1 The safety needle 10 appears to be locked out of use and can be used to distinguish that the safety needle 10 has been used.

In summary, the present invention is an invention of a safety needle and a safety needle device. The safety cap of the safety needle can be telescopically and rotatably assembled in the needle casing, and the housing of the needle casing. Providing a reverse guide groove having a stop elastic piece, the needle sheath of the safety cover has a needle sheath buckle extending into the back guide groove, and the stop guide groove includes an initial segment, a locking segment, an end segment and a guide The chute section, the starting section and the locking section are respectively located at the front section of the casing and are arranged at intervals, the end section is located at the rear section of the casing, and the rear end of the starting section is connected to the middle section of the end section, and the guiding chute section is connected to the locking section and the end point. Between the front sections of the segments, and with the side edges of the end segments extending toward the side of the guiding groove and extending to the rear side of the locking segment, the needle sheath of the safety cover is used by the anti-reverse channel with the anti-reverse shrapnel The guiding of the needle-sheathed buckle enables the safety cap to be able to telescopically move in the axial direction of the needle casing, in addition to controlling the timing of the needle protruding from the safety cap, and after use, the needle of the safety cap is borrowed The elastic cover provided by the elastic body covers the outer side of the lancet and passes through the needle and sheath buckle The reverse elastic piece and the guiding chute section enter the locking section, and the anti-reciprocal elastic piece is in the reverse direction of the needle-sheath spring buckle and cannot move backwards backward, so that the safety elastic cover is locked in the needle casing, and the safety needle is locked. Can no longer be used to ensure its security.

1‧‧‧Safety needle device

10‧‧‧Safety needle

20‧‧‧Needle case

21‧‧‧ housing

211‧‧‧Event space

212‧‧‧Shell wall

213‧‧‧ front port

214‧‧‧ Rear end plate

2141‧‧‧ alignment bump

2142‧‧‧ sector slot

215‧‧‧L-shaped inner slide

22‧‧‧ Needle joint

221‧‧‧Spin needle mounting hole

222‧‧‧ card ring groove

23‧‧‧Reverse guide channel

231‧‧‧ starting segment

232‧‧‧Lock section

233‧‧‧end point

234‧‧‧ Guided chute section

235‧‧‧Anti-rebound film

2351‧‧‧Resistance end

236‧‧‧ slotting

24‧‧‧through slot

25‧‧‧

30‧‧‧ Needle

31‧‧‧ Needle positioning plug

32‧‧‧ Needle fixing plug

40‧‧‧Syringe set socket

41‧‧‧ body

411‧‧‧L-shaped outer slide

42‧‧‧ Front Board

421‧‧‧ alignment recess

43‧‧‧Combined pipe department

431‧‧‧Snap flange

44‧‧‧ Needle through hole

50‧‧‧Safety cover

51‧‧‧ needle sheath

511‧‧‧ pinhole

512‧‧‧Assemble groove

52‧‧‧ Elastomers

53‧‧‧ positioning end

54‧‧‧Limited bumps

55‧‧‧ needle sheath buckle

60‧‧‧ outer cover

61‧‧‧ Rib convex

62‧‧‧ card to the convex

63‧‧‧ ring flange

70‧‧‧ Sealing film

80‧‧‧Syringe

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective exploded view of a preferred embodiment of the safety needle device of the present invention. FIG. 2 is a schematic perspective view showing a combination of a preferred embodiment of the safety needle device shown in FIG. 1. FIG. Figure 3 is a perspective view of a preferred embodiment of the safety needle of the present invention. Figure 4 is a side plan view of the preferred embodiment of the safety needle of Figure 3. FIG. 5 is a perspective exploded view of the preferred embodiment of the safety needle shown in FIG. 3 with the safety cover removed. Figure 6 is a perspective exploded view of the preferred embodiment of the safety needle shown in Figure 3. Figure 7 is a perspective exploded view showing another angle of view of the preferred embodiment of the safety needle shown in Figure 3. FIG. 8 is a perspective view of the preferred embodiment of the safety needle shown in FIG. 3 after the safety cover is removed. FIG. 9 is a perspective view showing another viewing angle of the preferred embodiment of the safety needle shown in FIG. 3 after the safety cover is removed. Figure 10 is a cross-sectional view showing a preferred embodiment of the safety needle shown in Figure 3. Figure 11 is a reference view (I) of the use state of the connecting syringe of the preferred embodiment of the safety needle of the present invention. Figure 12 is a reference view (2) of the state of use of the connecting syringe of the preferred embodiment of the safety needle of the present invention. Figure 13 is a reference view (3) of the state of use of the connecting syringe of the preferred embodiment of the safety needle of the present invention.

Claims (10)

A safety needle comprising: a needle sleeve housing comprising a housing and a lancet assembly, the housing comprising an active space and a housing wall at a periphery of the movable space, the rear end of the housing wall having a rear end a lancet joint portion is disposed in the movable space of the housing and protrudes forwardly from the front end of the rear end plate, and the lancet joint portion and the rear end plate form an axially penetrating lancet mounting hole. The housing forms at least one backstop groove, the backstop groove includes an initial section, a locking section, an end section and a guiding chute section, the starting section is located at a front section of the housing, the locking section Located at a front section of the housing and on a side of the starting section, the end section is located at a rear section of the housing, the rear end of the starting section is connected to a middle section of the end section, and the guiding chute section is connected to the locking section and the end point Between the front sections of the segment, the end segment forms a forwardly projecting anti-reciprocal elastic piece with respect to the other side of the starting segment, the front end of the anti-reciprocal elastic piece is a free end and extends forward to the rear side of the locking section and is located at the leading end One side of the chute section; a syringe set socket is provided on the needle a rear end of the shell; a lancet is inserted into the lancet mounting hole of the lancet joint of the needle casing, the anterior segment of the lance extending beyond the front end of the needle casing, and the rear end of the lance is extended to the syringe assembly And a safety cover capable of being axially telescopically and rotatably mounted in the needle casing, the safety cover comprising a needle sheath, a positioning end, and the needle sheath and the positioning end An elastic body, the positioning end is located in the movable space of the needle casing and is connected to the rear end plate portion, the elastic body is sleeved on the outer side of the lancet joint, the needle sheath comprises an axially penetrating pinhole, the needle Forming at least one needle sheath buckle at the rear end of the sheath, the needle sheath spring buckle correspondingly extending into the anti-reverse guide groove of the needle sleeve, the needle sheath spring buckle capable of stopping the reverse guide groove by having the anti-reverse elastic piece The guiding enables the safety cover to be telescopically movable in the axial direction of the needle casing, and can control the needle to extend the safety cover and lock the safety cover in the needle casing. The safety needle according to claim 1, wherein the inner side wall of the front end of the housing of the needle casing is provided with at least one L-shaped inner slide, and the L-shaped inner slide extends rearward from the front port of the housing to Close to the position of the initial stage of the anti-backstop groove, the needle-sheath buckle of the rear end of the needle sheath of the safety cover can be rotated from the front end of the needle casing along the L-shaped inner slide into the initial stage of the anti-reverse channel The elastic body is pre-compressed and rotated. The safety needle according to claim 2, wherein the front end surface of the end plate portion of the needle casing forms a two-radial symmetrical fan-shaped groove with respect to the periphery of the lancet joint portion, and the rear portion of the casing is opposite to the rear guide groove and the rear end plate. Forming at least one through groove between the portions, wherein the groove wall forms a rearwardly projecting elastic hook, and the elastic hook is located at a front side of the positioning end of the safety cover; the connection pin of the safety cover The elastic body between the sheath and the positioning end is formed in a spiral shape, and the rear end surface of the positioning end portion forms two limiting protrusions, and the two limiting protrusions respectively protrude into the rear end plate portion of the needle casing In the scalloped groove, the scalloped groove limits the range of rotation angle of the safety cover. The safety needle according to any one of claims 1 to 3, wherein the anti-reverse groove of the housing forms a slot for connecting the locking segment with respect to the other side of the end segment. The front end of the thrust spring is formed with abutting end. The safety needle according to claim 4, wherein the lancet is combined with a lancet positioning plug in the lancet joint of the needle casing, and the lancet rear end is combined with a lancet fixing plug set in the syringe set socket. in. The safety needle according to any one of claims 1 to 3, wherein a side of the end of the end plate portion of the needle sleeve is formed on a side of the back of the lancet mounting hole to form a rearwardly projecting aligning projection, the needle The cartridge assembly includes a seat body having an opening facing rearward, the front end of the base body having a front plate portion and a joint pipe portion projecting from a front end surface of the front plate portion, the syringe assembly being coupled to the joint pipe portion and An axially penetrating lancet through hole is formed in the front plate portion, and the combined pipe portion is disposed in the rear end plate portion of the needle casing and the lancet joint portion, and the front end portion of the front plate portion forms a pair of recessed portions, The aligning concave portion is correspondingly matched with the aligning convex portion of the end plate portion of the needle sleeve, and the lancet joint portion of the needle sleeve is formed with a snap ring groove at the rear wall of the lancet mounting hole, and the combination of the syringe assembly The peripheral wall of the tube portion forms a snap-in flange, and the snap-in flange is engaged with the snap ring groove. The safety needle according to claim 5, wherein the back side of the end sleeve portion of the needle sleeve is formed on a side of the back of the needle insertion hole to form a rearwardly projecting alignment protrusion, the syringe assembly includes a a front end opening body having a front plate portion and a joint pipe portion projecting from a front end surface of the front plate portion, the syringe group seat forming a joint portion in the joint pipe portion and the front plate portion An axially penetrating through-hole, the coupling tube portion is disposed in the rear end plate portion of the needle casing and the lancet joint portion, the front plate portion forming a pair of concave portions, the alignment concave portion and the needle sleeve After the shell, the alignment bumps of the end plate portion are correspondingly matched, and the lancet joint portion of the needle sleeve forms a snap ring groove in the hole wall of the rear portion of the lancet mounting hole, and the outer peripheral wall of the combined tube portion of the syringe assembly forms a card The flange is coupled to the snap ring groove. A safety needle device, comprising: the safety needle according to any one of claims 1 to 7; an outer cover, a hollow body having a front end and a rear end and a port having a port, the outer cover The sleeve is disposed outside the safety needle; and a film is sealed at the port at the rear end of the outer cover to seal the safety needle in the outer cover. The safety needle device of claim 8, wherein at least one axially extending rib-shaped protrusion is formed in an inner side wall of the front end of the outer cover, and at least one card is formed at an inner side wall of the outer cover adjacent to the port Abutting a convex portion; the outer peripheral surface of the needle sheath forms at least one axially extending fitting groove, and the fitting groove can be engaged with the rib-shaped convex portion in the inner side wall of the outer cover, and the outer peripheral surface of the syringe connecting seat is formed The L-shaped outer slide can be positioned by the card abutment along the outer slide. The safety needle device of claim 9, wherein the rear end of the outer cover forms a radially protruding ring flange, and the ring flange provides a portion where the sealing film is fixed.