CN210355561U - Safety injection needle and safety injection assembly - Google Patents

Abstract

The utility model provides a safe syringe needle and safe injection subassembly. The safety injection needle comprises an injection assembly and a trigger protection assembly assembled on the injection assembly, wherein the trigger protection assembly comprises a shell, a trigger mechanism and an elastic element, and the trigger mechanism comprises a containing part contained in the shell and an extending part which protrudes outwards from the containing part and exceeds the shell; the elastic element is accommodated in the accommodating part; when the trigger mechanism is in an initial position, the receiving portion is completely received within the housing; when the trigger mechanism is located at the locking position, the accommodating part partially protrudes out of the shell and the elastic element is exposed outside the shell. The utility model discloses a safe syringe needle and safe injection subassembly have the protect function of preferred in, have service condition indicating function concurrently, and simple structure, low in production cost is suitable for popularization and use.

Description

Safety injection needle and safety injection assembly

Technical Field

The utility model relates to a safe syringe needle and safe injection subassembly belongs to the medical instrument field.

Background

The injector is a common medical appliance, and generally comprises an injection syringe, a needle head connected to the injection syringe, and a protective sleeve covering the needle head; in the use process, the protective sleeve is removed at first, and the needle head is exposed to complete injection; after use, the needle head is separated from the injection syringe and is respectively discarded, so that the repeated use of the injector/needle head is avoided, and the cross infection caused by accidental contact of the used needle head is prevented.

However, in the using process of the injector, the needle tip is exposed, which will bring great psychological burden to the patient, and easily cause injury to human body due to the wrong needle tip, so that the using friendliness of the injector in the prior art is reduced. Furthermore, in the actual recycling process of the discarded syringe/needle, due to the lack of a protective sleeve, the needle is easy to pierce the containing package, so that the damage to the human body is caused, and the cross infection caused by accidental mistaken touch of the needle cannot be practically avoided; meanwhile, the used needle head in the prior art has no obvious difference with the needle head before use, and the use or non-use of the needle head can not be judged through the appearance of the needle head, so that the reuse of the waste needle head is easily caused.

In view of the above, there is a need to provide a new safety injection needle and safety injection assembly to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safe syringe needle and safe injection subassembly to mark the user state of safe syringe needle when guaranteeing the safety in utilization.

In order to achieve the above object, the present invention provides a safety injection needle, comprising an injection assembly and a trigger protection assembly assembled on the injection assembly, wherein the injection assembly comprises a needle holder and an injection needle fixedly connected to the needle holder in an axial direction, the trigger protection assembly comprises a housing, a first trigger mechanism and an elastic element, the first trigger mechanism comprises an accommodating portion accommodated in the housing and an extending portion protruding outwards from the accommodating portion and exceeding the housing; the elastic element is accommodated in the accommodating part; the elastic element elastically connects the first trigger mechanism and the needle seat, presses the first trigger mechanism to enable the first trigger mechanism to displace between an initial position and a locking position, and when the first trigger mechanism is located at the initial position, the accommodating part is completely accommodated in the shell; when the first trigger mechanism is located at the locking position, the accommodating part partially protrudes out of the shell and the elastic element is exposed outside the shell.

As a further improvement of the utility model, the containing part is a transparent arrangement.

As a further improvement of the present invention, the elastic element is a spring, and when the first trigger mechanism is located at the locking position, at least a part of the spring is exposed to the outside of the housing through the accommodating portion.

As a further improvement of the present invention, the elastic element includes an indicating member and an elastic member, and when the first trigger mechanism is located at the lock position, the indicating member is exposed to the outside of the housing through the accommodating portion.

As a further improvement of the present invention, the housing is a hollow tubular structure, one end of the housing is fixedly connected to the needle holder, the other end of the housing is extended outward in the axial direction of the needle holder to cover the needle holder, and a receiving space for receiving the first trigger mechanism and the elastic element is formed between the housing and the needle holder.

As a further improvement of the present invention, the needle base comprises a fixing portion and an assembling portion, and the axes of the fixing portion and the assembling portion are located on the same straight line; one end of the shell is connected to the assembling portion, the other end of the shell extends outwards along the axial direction of the needle seat and accommodates the fixing portion, the assembling portion is provided with a cylindrical inner cavity, the width/diameter of the fixing portion is smaller than that of the inner cavity, and the elastic element is sleeved on the fixing portion.

As a further improvement of the present invention, the accommodating portion includes a first guide wall for guiding the first trigger mechanism to rotate and a slider disposed on an outer wall of the accommodating portion, the slider is used for defining a sliding position and a sliding direction of the first trigger mechanism; the inner wall of the shell is provided with a sliding groove corresponding to the sliding block, and the bottom end of the sliding groove is provided with a boss used for positioning the sliding block.

As a further improvement of the present invention, the sliding groove includes a first displacement sliding groove and a second displacement sliding groove spaced from the first displacement sliding groove, a bottom end of the first displacement sliding groove and a bottom end of the second displacement sliding groove are communicated with each other, and the boss is disposed at a bottom end of the second displacement sliding groove; when the first trigger mechanism slides from an initial position to a locking position, the sliding block slides from the first displacement chute to the second displacement chute and is clamped on the boss.

As a further improvement of the present invention, the slider includes a limiting slider and a locking slider spaced from the limiting slider, the limiting slider is used for limiting the sliding position and the sliding direction of the first trigger mechanism, the locking slider is used for limiting the locking position of the first trigger mechanism and the housing, the sliding chute includes a displacement sliding chute corresponding to the limiting slider and a locking sliding chute corresponding to the locking slider, the boss is disposed at the bottom end of the locking sliding chute, and when the first trigger mechanism is at the initial position, the limiting slider is accommodated in the displacement sliding chute; when the first trigger mechanism is located at the locking position, the locking slide block is contained in the locking chute and clamped on the boss.

As a further improvement, the displacement chute includes first displacement chute and with the second displacement chute that first displacement chute interval set up, the bottom of first displacement chute with the bottom of second displacement chute communicates the setting each other, works as first trigger mechanism slides to the locking position by initial position when, spacing slider by first displacement chute slides to the second displacement chute, the locking slider slides and gets into the locking chute.

As a further improvement of the present invention, the first guide wall is provided with two at least, and at least two the first guide wall encloses and is established to supply to accommodate the holding cavity of the elastic element, the holding cavity is provided with the first wall of holding, the elastic element is held to the first wall of holding with between the needle file.

As a further improvement of the utility model, be connected with second trigger mechanism in the assembly portion, second trigger mechanism be equipped with the second guide wall that first guide wall corresponds and with the first second that supports and hold the wall that the wall corresponds supports and holds the wall, the elastic element card is held first supporting and holding between the wall and the second support and holding, and work as when elastic element is compressed, first guide wall with the interference takes place for the second guide wall, so that first trigger mechanism follows the circumferential direction of assembly portion.

As a further improvement of the present invention, the second trigger mechanism with assembly portion sliding connection, the second trigger mechanism still be equipped with the bullet arm that second guide wall interval set up, second guide wall, second are supported and are held the wall and play the arm and all run through the assembly portion, and can follow the axial and/or the circumferential motion of assembly portion, the second support hold the wall and/or be equipped with the locating piece on the bullet arm, correspond in the assembly portion and be equipped with the confession and accept the recess of locating piece, in order to inject the second trigger mechanism with slip/locking position between the assembly portion.

As a further improvement of the present invention, the positioning block includes a first positioning block and a second positioning block, wherein the first positioning block and the second positioning block are disposed on the elastic arm, the groove includes a first groove for receiving the first positioning block and a second groove for receiving the third positioning block, the first groove is defined as the positive direction of the fixing portion, the first positioning block is disposed above the third positioning block, the second positioning block is disposed above the third positioning block, and the first groove is disposed above the second groove.

In order to realize the above utility model purpose, the utility model also provides a safe injection subassembly, include safe syringe needle and connect injection device on the safe syringe needle, safe syringe needle with the connection can be dismantled to injection device, just safe syringe needle is aforementioned safe syringe needle.

The utility model has the advantages that: the safety injection needle of the utility model is provided with the shell, the trigger mechanism and the elastic element, so that the trigger mechanism can slide along the extending direction of the shell under the action of the elastic element, and the injection needle is completely accommodated between the trigger mechanism and the needle seat after the safety injection needle is used, thereby ensuring the use safety; simultaneously, through setting up form and relative position to first trigger mechanism, second trigger mechanism and elastic element design for at least some elastic element exposes outside the casing after using to distinguish with the safety syringe needle that does not use, further promoted safety and the practicality of safety syringe needle.

Drawings

Fig. 1 is an exploded view of a safety injection needle and a shield body according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the structure of the injection assembly of fig. 1.

Fig. 3 is another angular configuration of the hub of fig. 2.

Fig. 4 is a cross-sectional view of the needle hub of fig. 2.

Fig. 5 is an exploded view of the trigger mechanism of fig. 1.

Fig. 6 is a schematic view of the trigger mechanism and injection assembly of fig. 1 in combination.

Fig. 7 is a schematic structural view of the housing of fig. 1.

Fig. 8 is a cross-sectional view of the housing of fig. 7.

Fig. 9 is a schematic structural view of the first trigger mechanism in fig. 6.

Fig. 10 is another angular configuration of the first trigger mechanism of fig. 9.

Fig. 11 is a schematic structural view of the second trigger mechanism in fig. 6.

Fig. 12 is a schematic view of the second trigger mechanism of fig. 6 in combination with the injection assembly.

Fig. 13 is a cross-sectional view of the safety injection needle in a different position.

Fig. 14 is an exploded view of a safety injection needle according to a second embodiment of the present invention.

Fig. 15 is a schematic structural view of the housing of fig. 14.

Fig. 16 is a schematic structural view of the first trigger mechanism in fig. 14.

Fig. 17 is another angular configuration of the first trigger mechanism of fig. 16.

Fig. 18 is an exploded view of a safety injection needle according to a third embodiment of the present invention.

Fig. 19 is a schematic view of the structure of the hub of fig. 18.

Fig. 20 is a schematic view of another angular configuration of the hub shown in fig. 19.

Fig. 21 is a schematic structural view of the second trigger mechanism in fig. 18.

Fig. 22 is a schematic view of the second trigger mechanism and needle hub combination of fig. 18.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, 2 and 5, a safety syringe 100 according to a first embodiment of the present invention is shown. The safety injection needle 100 includes an injection assembly 1 and a trigger protection assembly 2 assembled to the injection assembly 1, and the trigger protection assembly 2 is covered outside the injection assembly 1 to prevent the injection assembly 1 from causing injury to a human body after use.

Referring to fig. 2 to 4, the injection assembly 1 includes a needle holder 11 and an injection needle 12 fixedly connected to the needle holder 11 in an axial direction. In the present invention, the needle seat 11 includes a fixing portion 111 and an assembling portion 112, and the axes of the fixing portion 111 and the assembling portion 112 are located on the same straight line; specifically, the fixing portion 111 is provided on the fitting portion 112 and is formed to extend outward along the axis of the fitting portion 112; the assembling portion 112 has a cylindrical inner cavity 113, the width/diameter of the fixing portion 111 is smaller than the diameter of the inner cavity 113, and the inner wall of the inner cavity 113 is provided with a connecting portion 1131 for holding and connecting an injection device (not shown); preferably, the connecting portion 1131 is threaded, but in other embodiments, the connecting portion 1131 may be provided in other forms, as long as the safety injection needle 100 is firmly connected to the injection device.

Further, the end of the injection needle 12 away from the assembling portion 112 is defined as a distal end, the end close to the assembling portion 112 is defined as a proximal end, and the proximal end of the injection needle 12 penetrates through the fixing portion 111 and the assembling portion 112 and is accommodated in the inner cavity 113; the distal end extends in the axial direction of the fixing portion 111 toward the side away from the fitting portion 112, and is fixedly attached to the fixing portion 111 to prevent the injection needle 12 from sliding in the axial direction of the hub 11.

Referring to fig. 5 to 12 in combination with fig. 1, the trigger protection assembly 2 includes a housing 21, a trigger mechanism 22 and an elastic element 23. The housing 21 covers the needle holder 11, in the present invention, the housing 21 is a hollow tubular configuration, and defines one side of the needle holder 11 close to the assembling portion 112 as an inner side, and one side close to the fixing portion 111 as an outer side, so that one end of the housing 21 is connected with the assembling portion 112 by clamping, the other end extends outward along the axial direction of the needle holder 11 and accommodates the fixing portion 111, and an accommodating space for accommodating the trigger mechanism 22 and the elastic element 23 is formed between the housing 21 and the fixing portion 111. Preferably, in the present invention, the housing 21 and the needle holder 11 are detachably connected, but in other embodiments, the housing 21 may also be integrally disposed with the needle holder 11, that is, the connection mode between the housing 21 and the needle holder 11 may be selected according to actual needs, and is not limited herein.

The trigger member 22 includes a first trigger mechanism 24 disposed in a hollow manner and sleeved outside the fixing portion 111, and a second trigger mechanism 25 disposed corresponding to the first trigger mechanism 24. The first trigger mechanism 24 includes a receiving portion 241 and an extending portion 242; the accommodating portion 241 is accommodated in the housing 21 and slidably coupled to the housing 21, and the accommodating portion 241 includes a first guide wall 243 and a slider 244 provided on an outer wall of the accommodating portion 241.

The first guide wall 243 may be used to define, on the one hand, the connection position of the first trigger mechanism 24 with the housing 21; on the other hand, the first triggering mechanism 24 can be guided to rotate along the circumferential direction of the needle holder 11 under the action of external force, specifically, the first guiding wall 243 is provided with an inclined first inclined guiding surface 245, the first inclined guiding surface 245 is arranged on one side surface of the first guiding wall 243 extending along the circumferential direction of the assembling portion 112, in the embodiment, the first guiding wall 243 is provided with at least two accommodating cavities 246 which are enclosed to accommodate the elastic elements 23, a first abutting wall 247 is arranged in the accommodating cavity 246, and the elastic elements 23 abut between the first abutting wall 247 and the second triggering mechanism 25, so as to elastically connect the first triggering mechanism 24 and the second triggering mechanism 25. Of course, in other embodiments, the number of the first guide walls 243 may also be 1, that is, in the present invention, the number of the first guide walls 243 may be selected according to the requirement, which is not limited herein.

The sliding block 244 is used for limiting the sliding position and the sliding direction of the trigger mechanism 22, a sliding groove 211 corresponding to the sliding block 244 is arranged on the inner wall of the housing 21, and a boss 212 for positioning the sliding block 244 is arranged at the bottom end of the sliding groove 211. In the present embodiment, the slider 244 includes a limit slider 248 and a lock slider 249 spaced from the limit slider 248, wherein the limit slider 248 is used for defining the sliding position and the sliding direction of the first trigger mechanism 24, the lock slider 249 is used for defining the locking position of the first trigger mechanism 24 and the housing 21, and in the present embodiment, the lock slider 249 is an elastic slider such as a spring plate capable of elastically deforming.

The slide groove 211 includes a displacement slide groove provided corresponding to the stopper slider 248 and a lock slide groove 213 provided corresponding to the lock slider 249. The displacement spout includes first displacement spout 214 and the second displacement spout 215 that sets up with first displacement spout 214 interval, it is the initial point to define fixed part 111 and the hookup location department of assembly portion 112, the extending direction of fixed part 111 is the positive direction, in the positive direction, spout 211 has the top of keeping away from the initial point and the bottom that is close to the initial point, in this embodiment, first displacement spout 214 and second displacement spout 215 pass through baffle 216 interval and set up, and the bottom of baffle 216 is equipped with the logical groove 217 that supplies spacing slider 248 to pass through, so that the bottom of first displacement spout 214 and the bottom of second displacement spout 215 communicate the setting each other.

The locking sliding slot 213 and the displacement sliding slot are spaced apart, in this embodiment, a partition 218 is disposed between the locking sliding slot 213 and the second displacement sliding slot 215, when the first triggering mechanism 24 slides in the housing 21, the first guiding wall 243 at least partially interferes with the partition 218 to define the rotation direction and the rotation angle of the first triggering mechanism 24 in the housing 21, and further, a boss 212 is disposed at the bottom end of the locking sliding slot 213 for positioning the locking slider 249.

The extending portion 242 extends from the accommodating portion 241 in the axial direction (i.e., the positive direction) of the hub 11, the extending portion 242 protrudes out of the housing 21 and partially accommodates the fixing portion 111 and the injection needle 12, and further, the extending portion 242 is provided with a through hole 240 for accommodating the injection needle 12.

In the present embodiment, the first trigger 24 is slidable in the housing 21 from an initial position to a locking position through the injection position, specifically, when the first trigger 24 is in the initial position, the first guide wall 243 is held inside the housing 21, the limit slider 248 is received in the top end of the first displacement chute 214, the injection needle 12 is completely received in the extending portion 242, and the receiving portion 241 is completely received in the housing 21; as the first trigger mechanism 24 slides from the initial position to the injection position, the first trigger mechanism 24 moves along the top end of the first displacement slide 214 toward the bottom end of the first displacement slide 214.

When the first trigger mechanism 24 slides to the injection position, the limit slider 248 slides to the through slot 217, the accommodating portion 241 and the extending portion 242 are completely accommodated in the housing 21, and the injection needle 12 passes through the through hole 240 to act on the patient to complete the injection of the medicine; after the injection of the medicine is completed, the first trigger mechanism 24 slides from the injection position to the locking position, the limiting slider 248 slides out of the through slot 217, enters the second displacement chute 215 and slides from the bottom end to the top end of the second displacement chute 215, and at this time, the locking slider 249 enters the locking chute 213 and moves toward the top end of the housing 21 along with the first trigger mechanism 24.

When the first trigger 24 slides to the locking position, the first guide wall 243 is clamped at the top end of the housing 21, the limit slider 248 is received at the top end of the second displacement chute 215, the locking slider 249 slides to the locking chute 213, and one end of the locking slider 249 abuts against the top end of the locking chute 213, and the other end is clamped on the boss 212 to lock the position of the first trigger 24, at this time, the extending portion 242 and at least a part of the accommodating portion 241 protrude outwards from the top end of the housing 21, and the elastic element 23 is exposed outside the housing 21 through the accommodating portion 241 to indicate that the safety needle 100 is used; further, the injection needle 12 is accommodated in the extension part 242 again, so that the used injection needle 12 is prevented from injuring the human body, and the cross infection caused by accidentally touching the used injection needle 12 is effectively avoided.

The second trigger mechanism 25 partially penetrates the mounting portion 112 and is movable in the axial direction and/or the circumferential direction of the mounting portion 112, the second trigger mechanism 25 includes a second guide wall 251, a second abutting wall 252 and an elastic arm 253, in this embodiment, the second guide wall 251, the second abutting wall 252 and the elastic arm 253 all penetrate the mounting portion 112, and the injection needle 12 penetrates the second trigger mechanism 25 in the axial direction of the needle holder 11 and is slidable relative to the second trigger mechanism 25.

The second guide wall 251 is provided corresponding to the first guide wall 243, and the second guide wall 251 is provided with a second slanted guide surface 254 provided corresponding to the first slanted guide surface 245, specifically, the second slanted guide surface 254 is provided on one side surface of the second guide wall 251 extending in the circumferential direction of the fitting portion 112; the second abutting wall 252 is disposed at the top end of the second guiding wall 251 and is formed by extending along the circumferential direction of the assembling portion 112, the second abutting wall 252 is disposed corresponding to the first abutting wall 247, the elastic element 23 is clamped between the first abutting wall 247 and the second abutting wall 252, when the elastic element 23 is compressed, the first guiding wall 243 interferes with the second guiding wall 251, and the first inclined guiding surface 245 abuts against the second inclined guiding surface 254, so that the first triggering mechanism 24 rotates along the circumferential direction of the assembling portion 112 under the guiding action of the second triggering mechanism 25.

The elastic arm 253 is disposed at a distance from the second guide wall 251, and the elastic arm 253 is disposed on a side of the second guide wall 251 away from the second inclined guide surface 254.

Further, the fitting portion 112 is provided with a through hole 114 for accommodating the second guide wall 251 and the elastic arm 253, and a through hole wall 115 of the through hole 114 adjacent to the second inclined guide surface 254 is obliquely arranged, so that when the second trigger mechanism 25 moves toward the first trigger mechanism 24 along the axial direction of the fitting portion 112, the through hole wall 115 abuts against the second inclined guide surface 254 to push the second trigger mechanism 25 to rotate along the circumferential direction of the fitting portion 112.

The second guide wall 251 and the elastic arm 253 are respectively provided with a positioning block, in this embodiment, the positioning block includes a first positioning block 255 disposed on the second guide wall 251, and a second positioning block 256 and a third positioning block 257 disposed on the elastic arm 253, and in the positive direction, the first positioning block 255 is located above the third positioning block 257, and the second positioning block 256 is located above the third positioning block 257.

The assembling portion 112 is provided with grooves corresponding to the positioning blocks, the grooves include a first groove 116 for accommodating the first positioning block 255/the third positioning block 257 and a second groove 117 for accommodating the third positioning block 257, and in the positive direction, the first groove 116 is located above the second groove 117.

In the present invention, the second trigger mechanism 25 can slide from the initial position to the lock position through the preparation position in the fitting portion 112. Specifically, when the second trigger mechanism 25 is in the initial position, the third positioning block 257 is retained in the first recess 116, and the second guiding wall 251 and the elastic arm 253 partially penetrate the assembling portion 112 and are accommodated between the housing 21 and the fixing portion 111, and the proximal portion/whole of the injection needle 12 is accommodated in the second trigger mechanism 25, so that the injection needle 12 can be effectively prevented from being contaminated by the external environment before use; on the other hand, the axial position of the needle 12 can be effectively positioned, and the needle 12 can be prevented from being deviated or bent when the injection device is connected into the inner cavity 113.

Further, the injection device is connected to the needle holder 11 through the connecting portion 1131, and in this embodiment, during the process of connecting the injection device to the assembling portion 112 through a thread, the injection device will push the second trigger mechanism 25 to slide from the initial position to the ready position along the axial direction of the needle holder 11 under the action of external force. During the sliding process, the through hole wall 115 abuts against the second inclined guide surface 254, and pushes the second trigger mechanism 25 to rotate along the circumferential direction of the assembling portion 112 until the second guide wall 251 and the elastic arm 253 completely penetrate through the through hole 114 to reach the preparation position of the second trigger mechanism 25, at this time, the first trigger mechanism 24 is still at the initial position, the elastic element 23 is compressed to abut against the second abutting wall 252, and the proximal end of the injection needle 12 penetrates through the second trigger mechanism 25 and is inserted into the injection device.

After the injection of the medicine is finished, when the injection device is removed, the elastic element 23 drives the second trigger mechanism 25 to slide towards the side away from the fixing portion 111 along the axial direction of the needle holder 11 under the elastic action of the elastic element, and stops until the second trigger mechanism 25 slides to the locking position, when the second trigger mechanism 25 is located at the locking position, the first positioning block 255 is clamped in the first groove 116, the third positioning block 257 is clamped in the second groove 117, the second positioning block 256 enters the assembling portion 112 under the action of the elastic arm 253 and abuts against the inner side of the top wall of the assembling portion 112, and at this time, the top end portion/all of the injection needle 12 is accommodated in the second trigger mechanism 25. Preferably, in this embodiment, when the second trigger mechanism 25 is in the lock position, the entire injection needle 12 is housed in the second trigger mechanism 25 to prevent the used injection needle 12 from injuring the patient.

The elastic element 23 elastically connects the trigger mechanism 22 and the hub 11, so that when the trigger mechanism 22 is pressed, the trigger mechanism 22 is displaced between an initial position and a locking position, in this embodiment, the elastic element 23 is accommodated in the accommodating portion 241, the accommodating portion 241 is transparent, the elastic element 23 is arranged close to the inner wall of the accommodating portion 241 at a position where the first abutting wall 247 abuts against the elastic element 23, and when the first trigger mechanism 24 is at the initial position, the accommodating portion 241 is accommodated in the housing 21, so that the elastic element 23 cannot be observed through the accommodating portion 241; when the first trigger mechanism 24 is in the locking position, the partial accommodating portion 241 protrudes from the top end of the housing 21, so that at least part of the elastic element 23 is observed by the accommodating portion 241 protruding out of the housing 21.

Of course, in other embodiments, the accommodating portion 241 may also be configured to have an observation hole, so that the elastic element 23 can be observed through the observation hole, that is, in the embodiment of the present invention, the specific configuration of the accommodating portion 241 may be selected according to actual needs, and it is only necessary to ensure that the elastic element 23 can be observed through the accommodating portion 241 at the locking position.

In the present invention, the elastic element 23 is a spring, and when the first trigger mechanism 24 is located at the locking position, at least a part of the spring (including a half-coil spring, a coil spring or a multi-coil spring) is exposed outside the housing 21 through the accommodating portion 241. Of course, in another embodiment of the present invention, the elastic element 23 may also be a combination of an indication member (not shown) and an elastic member (not shown), the indication member and the elastic member are received in the receiving portion 241, the indication member is disposed close to the inner wall of the receiving portion 241, the elastic member abuts against the first abutting wall 247 through the indication member, when the first trigger mechanism 24 is located at the locking position, the elastic member continues to be received in the receiving portion 241, and the indication member is exposed to the outside of the housing 21 through the receiving portion 241.

Further, still can be provided with the identification mark on the elastic element 23, this identification mark is used for exposing outside casing 21 after safety syringe needle 100 uses to make things convenient for patient/user's the quick accurate in service behavior to safety syringe needle 100 to judge, preferably the utility model discloses in, the identification mark can be one or several kinds among colour sign, texture sign, symbol sign or the figure sign. It should be noted that, in the present invention, the elastic element 23 is only exemplified as a spring or a combination of an indication member and an elastic member, but it should not be limited thereto, and in other embodiments, the elastic element 23 may also be a separate elastic member or a combination of an elastic member and other indication members, which elastically connects the trigger mechanism 22 and the needle seat 11 and is displayed through the accommodating portion 241, that is, in the present invention, the specific arrangement form of the elastic element 23 is not limited.

Referring to fig. 1, the safety syringe 100 is further connected with a shield for accommodating the safety syringe 100, the shield includes a shield main body 200 and a protection film (not shown) sealed at an opening of the shield main body 200, the shield main body 200 is sleeved outside the housing 21, and the protection film seals the injection assembly 1 and the trigger protection assembly 2 in the shield main body 200 to prevent the injection assembly 1 and the trigger protection assembly 2 from being exposed to the external environment, so as to ensure the sanitation of the injection assembly 1 and the trigger protection assembly 2.

Referring to fig. 13, in the use of the safety injection needle 100 of the present embodiment, the protective film enclosed on the shield body 200 is firstly torn, and then the injection device is connected to the inner cavity 113 of the mounting portion 112, during the connection process of the injection device with the mounting portion 112, the second trigger mechanism 25 is pushed to move along the axial direction of the needle holder 11 toward the direction of the fixing portion 111, and rotates along the circumferential direction of the mounting portion 112 under the action of the through hole wall 115, and after the connection of the injection device with the mounting portion 112 is stabilized, the second trigger mechanism 25 slides from the initial position to the ready position, and the elastic element 23 is compressed.

Then, the shield body 200 covering the outside of the housing 21 is removed to expose the safety needle 100, and at this time, the distal end of the needle 12 is accommodated in the first trigger mechanism 24, the safety injection needle 100 is transferred to the position where the injection is required, the first trigger 24 is pressed, the extension 242 protruding outside the housing 21 slides in the axial direction of the needle holder 11 toward the direction of the fitting portion 112 by the external force, and during the sliding process of the first trigger mechanism 24, the first inclined guide surface 245 abuts against the second inclined guide surface 254, so that the first trigger mechanism 24 rotates along the circumferential direction of the assembling portion 112 under the pushing action of the second inclined guide surface 254, the limit slider 248 is separated from the first displacement chute 214 into the through groove 217, the elastic element 23 is further compressed, and the needle 12 passes out of the through hole 240 in the top of the first trigger mechanism 24 to act on the patient and complete the injection of the medicament through the injection device.

After the injection of the medicine is completed, the safety injection needle 100 is pulled off from the patient, and at this time, the limiting slider 248 is separated from the through groove 217 into the second displacement chute 215 under the action of the elastic element 23 and slides in the axial direction of the needle seat 11 towards the direction away from the assembling portion 112, so that the extending portion 242 and part of the accommodating portion 241 protrude from the top end of the housing 21, and the first trigger mechanism 24 is locked at the locking position under the cooperation action of the locking slider 249 and the locking chute 213, and the distal end of the injection needle 12 is accommodated in the first trigger mechanism 24 again, and at least part of the elastic element 23 can be observed through the accommodating portion 241; further, the safety needle 100 is removed from the injection device, during the removal process, the second trigger mechanism 25 slides along the axial direction of the needle holder 11 toward the side away from the fixing portion 111 under the action of the elastic element 23, and is clamped in the assembling portion 112 through the second positioning block 256, so that the second trigger mechanism 25 is locked at the locking position, and the proximal end of the needle 12 is completely accommodated in the second trigger mechanism 25, thereby completing the separation of the safety needle 100 from the injection device.

Referring to fig. 14 to 17, a safety injection needle 100 'according to a second embodiment of the present invention is shown, in this embodiment, the safety injection needle 100' has substantially the same structure as the safety injection needle 100 according to the first embodiment, the safety injection needle 100 'includes an injection assembly 1 and a trigger protection assembly 2, the injection assembly 1 includes a needle holder 11' and an injection needle 12 ', and the trigger protection assembly 2 includes a housing 21' and a trigger mechanism 22. The difference points are as follows: the arrangement of the slide block 244 ' in the first trigger mechanism 24 ' and the slide groove 211 ' in the housing 21 ' is different, and the following description will be made for the differences between the safety injection needle 100 ' and the safety injection needle 100, and the same parts will not be described again.

In the present embodiment, the slider 244 ' is a positioning slider for defining the sliding position and the sliding direction of the trigger mechanism 22, and the slider 244 ' includes a limiting portion 2441 ' fixed on the outer wall of the accommodating portion 241 ' and a locking portion 2442 ' extending from the limiting portion 2441 ' beyond the accommodating portion 241 ' in the axial direction of the hub 11 ', and preferably, in the present embodiment, the locking portion 2442 ' is provided in a spring sheet shape.

The inner wall of the housing 21 'is provided with a slide groove 211' corresponding to the slide block 244 ', the slide groove 211' includes a first displacement slide groove 214 'and a second displacement slide groove 215' spaced from the first displacement slide groove 214 ', and a boss 212' for positioning the slide block 244 'is provided at a bottom end of the second displacement slide groove 215'.

In this embodiment, when the first trigger mechanism 24 ' is in the initial position, the slider 244 ' is received at the top end of the first displacement slide 214 '; when the first trigger mechanism 24 ' slides from the initial position to the injection position, the first trigger mechanism 24 ' slides from the top end to the bottom end of the first displacement chute 214 '; when the first trigger mechanism 24 ' slides to the injection position, the slider 244 ' slides to the through slot 217 ' and the injection needle 12 ' passes through the through hole 240 ' to complete the injection of the medicine, and after the injection is completed, the slider 244 ' slides out of the through slot 217 ', enters the second sliding slot 215 ' and slides from the bottom end to the top end of the second sliding slot 215 '.

When the first trigger 24 'slides to the locking position, the position-limiting portion 2441' is received at the top end of the second displacement chute 215 ', and the locking portion 2442' is clamped on the boss 212 'to lock the position of the first trigger 24', and at this time, the elastic element 23 'is exposed to the outside of the housing 21' through the receiving portion 241 'to indicate that the safety needle 100' is used; the needle 12 ' is again received within the extension 242 ' to prevent the needle 12 ' from causing injury to the human body after use.

Referring to fig. 18-22, the safety needle 100 "of the third embodiment of the present invention is substantially the same as the safety needle 100 of the first embodiment and the safety needle 100' of the second embodiment, the safety needle 100" includes an injection assembly 1 and a trigger protection assembly 2, the injection assembly 1 includes a needle holder 11 "and a needle 12", and the trigger protection assembly 2 includes a housing 21 "and a trigger mechanism 22. The difference points are as follows: the arrangement form of the second trigger mechanism 25 "and the connection form of the second trigger mechanism 25" and the needle holder 11 "are different, and the following description will be made for the differences between the safety injection needle 100" and the safety injection needles 100 and 100', and the description of the same parts will not be repeated.

In the present embodiment, the second triggering mechanism 25 "includes a second guiding wall 251", a second abutting wall 252 "and a resilient arm 253", the second guiding wall 251 "is disposed on the assembling portion 112" and is integrally formed with the assembling portion 112 "; further, a through hole 114 "is formed in the assembling portion 112", the second abutting wall 252 "and the elastic arm 253" are arranged through the assembling portion 112 "through the through hole 114", and the second abutting wall 252 "is arranged on the top of the elastic arm 253" and extends in the axial direction of the assembling portion 112 "; the elastic arm 253 "is disposed on a side of the second guide wall 251" facing away from the second inclined guide surface 254 ", and the second abutting wall 252" and the elastic arm 253 "are slidable relative to the fitting portion 112".

The elastic arm 253 "is provided with a third inclined guide surface 258" on the circumference of the side close to the second guide wall 251 ", and a positioning block is arranged on the elastic arm 253". The positioning blocks include a first positioning block 255 ", a second positioning block 256", and a third positioning block 257 ", the second positioning block 256" extends along the circumferential direction of the mounting portion 112 "toward a side away from the second guide wall 251", and in the positive direction, the first positioning block 255 "is located above the third positioning block 257", and the second positioning block 256 "is located above the third positioning block 257". Preferably, in the present embodiment, the first positioning block 255 ", the second positioning block 256", and the third positioning block 257 "are respectively disposed on two adjacently disposed elastic arms 253" with different heights, so as to ensure the flexibility of the elastic arms 253 "in clamping and abutting.

The fitting portion 112 "is provided with a through hole 114" for accommodating the elastic arm 253 ", and a through hole wall 115" of the through hole 114 "on a side close to the elastic arm 253" is obliquely arranged, so that when the elastic arm 253 "moves toward the first trigger mechanism 24" along the axial direction of the fitting portion 112 ", the through hole wall 115" abuts against the third inclined guide surface 258 "to push the elastic arm 253" to rotate along the circumferential direction of the fitting portion 112 ".

In the present embodiment, the elastic arm 253 "is slidable from the initial position to the lock position through the ready position within the fitting portion 112". Specifically, when the elastic arm 253 "is in the initial position, the third positioning block 257" is clamped on the mounting portion 112 ", and the elastic arm 253" partially penetrates the mounting portion 112 "and is accommodated between the housing 21" and the fixing portion 111 ", and the tip end portion/whole of the needle 12" is accommodated in the elastic arm 253 ", so that the needle 12" can be effectively prevented from being contaminated by the external environment before use; on the other hand, the axial position of the needle 12 "is fixed to prevent the needle 12" from being displaced or bent when the injection device (not shown) is connected.

Further, during the installation of the injection device, the elastic arm 253 "slides towards the top end of the fixing portion 111" along the axial direction of the assembling portion 112 "under the action of external force, during the sliding process, the through hole wall 115" abuts against the third inclined guide surface 258 ", the elastic arm 253" is pushed to rotate along the circumferential direction of the assembling portion 112 ", until the elastic arm 253" completely penetrates through the through hole 114 "and reaches the preparation position of the second trigger mechanism 25", at this time, the elastic element 23 "is compressed to abut against the second abutting wall 252", and the proximal end of the injection needle 12 "penetrates through the elastic arm 253" and is inserted into the injection device.

After the injection of the medicine is finished, when the injection device is removed, the elastic element 23 "drives the elastic arm 253" to slide towards the side away from the fixing portion 111 "along the axial direction of the needle seat 11" under the elastic action of the elastic element, until the elastic arm 253 "slides to the locking position, the elastic element stops sliding, when the elastic arm 253" is located at the locking position, the first positioning block 255 "is clamped in the first groove 116", the third positioning block 257 "is accommodated in the assembling portion 112", the second positioning block 256 "enters the assembling portion 112" under the action of the elastic arm 253 "and abuts against the inner side of the top wall of the assembling portion 112", and the top end portion/whole of the injection needle 12 "is accommodated in the elastic arm 253". Preferably, in this embodiment, when the resilient arm 253 "is in the locked position, the needle 12" is fully received in the resilient arm 253 "to prevent the used needle 12" from injuring the patient.

The utility model also provides a safe injection subassembly (not shown), safe injection subassembly includes injection apparatus and the safe syringe needle 100 of connection on injection apparatus, 100 ', 100 ", and further, safe syringe needle 100, 100 ', 100" can be dismantled with injection apparatus and be connected, make the utility model discloses a safe injection subassembly has the safety in utilization of preferred, is suitable for the injection of injections such as insulin, children's bacterin among the daily life.

In summary, the safety injection needle 100, 100 ', 100 "of the present invention is configured such that the first trigger mechanism 24, 24 ', 24" is connected to the housing 21, 21 ', 21 "and the second trigger mechanism 25, 25 ', 25" is connected to the needle seat 12, 12 ', 12 "such that the first trigger mechanism 24, 24 ', 24" and the second trigger mechanism 25, 25 ', 25 "can slide along the extending direction of the housing 21, 21 ', 21" under the action of the elastic element 23, 23 ', 23 "to fully accommodate the distal end of the injection needle 12, 12 ', 12" between the first trigger mechanism 24, 24 ', 24 "and/or the needle seat 11, 11 ', 11" after the safety injection needle 100, 100 ', 100 "is used, and the proximal end is at least partially accommodated between the second trigger mechanism 25, 25 ', 25" and/or the needle seat 11, 11 ', 11 ", the safety of the safety injection needle 100, 100' of the utility model is ensured.

Meanwhile, by setting the connection form and the relative position of the slider 244, 244 ', 244 "and the sliding groove 211, 211 ', 211", at least part of the elastic element 23, 23 ', 23 "is exposed outside the housing 21, 21 ', 21" through the accommodating portion 241, 241 ', 241 "of the first triggering mechanism 24, 24 ', 24" after being used, so as to be distinguished from the unused safety injection needle 100, 100 ', 100 ", the safety injection needle 100, 100 ', 100" of the present invention has a better protection function, and has a use state indication function, thereby achieving the purpose of improving the practicability of the safety injection needle 100, 100 ', 100 ".

Further, the utility model discloses a safety syringe needle 100, 100 ', 100 "simple structure, through the cooperation of slider 244, 244', 244", spout 211, 211 ', 211 "and elastic element 23, 23', 23", realized the protection and the instruction function of safety syringe needle 100, 100 ', 100 ", reduced the utility model discloses safety syringe needle 100, 100', 100"'s manufacturing cost makes the utility model discloses a safety syringe needle 100, 100', 100 "is suitable for production and use.

The utility model discloses a safe injection subassembly has effectively promoted through using safe syringe needle 100, 100 ', 100 "as the syringe needle subassembly of medicament injection in-process the utility model discloses safe injection subassembly's safety in utilization, convenient popularization and use.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims (15)

1. A safety injection needle comprising an injection assembly and a trigger protection assembly mounted on said injection assembly, said injection assembly comprising a hub and an injection needle fixedly connected axially to said hub, characterized in that: the trigger protection assembly comprises a shell, a first trigger mechanism and an elastic element, wherein the first trigger mechanism comprises a containing part contained in the shell and an extending part which protrudes outwards from the containing part and exceeds the shell; the elastic element is accommodated in the accommodating part; the elastic element elastically connects the first trigger mechanism and the needle seat, presses the first trigger mechanism to enable the first trigger mechanism to displace between an initial position and a locking position, and when the first trigger mechanism is located at the initial position, the accommodating part is completely accommodated in the shell; when the first trigger mechanism is located at the locking position, the accommodating part partially protrudes out of the shell and the elastic element is exposed outside the shell.

2. A safety injection needle according to claim 1, characterized in that: the holding part is transparent.

3. A safety injection needle according to claim 1 or 2, characterized in that: the elastic element is a spring, and when the first trigger mechanism is located at the locking position, at least part of the spring is exposed to the outside of the shell through the accommodating part.

4. A safety injection needle according to claim 1 or 2, characterized in that: the elastic element includes an indicating member exposed to the outside of the housing through the receiving portion when the first trigger mechanism is located at the lock position, and an elastic member.

5. A safety injection needle according to claim 1, characterized in that: the shell is arranged in a hollow tubular shape, one end of the shell is fixedly connected with the needle seat, the other end of the shell extends outwards along the axial direction of the needle seat to cover the needle seat, and an accommodating space for accommodating the first trigger mechanism and the elastic element is formed between the shell and the needle seat.

6. A safety injection needle according to claim 5, characterized in that: the needle seat comprises a fixing part and an assembling part, and the axes of the fixing part and the assembling part are positioned on the same straight line; one end of the shell is connected to the assembling portion, the other end of the shell extends outwards along the axial direction of the needle seat and accommodates the fixing portion, the assembling portion is provided with a cylindrical inner cavity, the width/diameter of the fixing portion is smaller than that of the inner cavity, and the elastic element is sleeved on the fixing portion.

7. A safety injection needle according to claim 1, characterized in that: the accommodating part comprises a first guide wall for guiding the first trigger mechanism to rotate and a slide block arranged on the outer wall of the accommodating part, and the slide block is used for limiting the sliding position and the sliding direction of the first trigger mechanism; the inner wall of the shell is provided with a sliding groove corresponding to the sliding block, and the bottom end of the sliding groove is provided with a boss used for positioning the sliding block.

8. A safety injection needle according to claim 7, characterized in that: the sliding chutes comprise a first displacement sliding chute and a second displacement sliding chute arranged at an interval with the first displacement sliding chute, the bottom ends of the first displacement sliding chute and the second displacement sliding chute are communicated with each other, and the bosses are arranged at the bottom end of the second displacement sliding chute; when the first trigger mechanism slides from an initial position to a locking position, the sliding block slides from the first displacement chute to the second displacement chute and is clamped on the boss.

9. A safety injection needle according to claim 7, characterized in that: the sliding block comprises a limiting sliding block and a locking sliding block arranged at an interval with the limiting sliding block, the limiting sliding block is used for limiting the sliding position and the sliding direction of the first trigger mechanism, the locking sliding block is used for limiting the locking position of the first trigger mechanism and the shell, the sliding groove comprises a displacement sliding groove arranged corresponding to the limiting sliding block and a locking sliding groove arranged corresponding to the locking sliding block, the boss is arranged at the bottom end of the locking sliding groove, and when the first trigger mechanism is at the initial position, the limiting sliding block is accommodated in the displacement sliding groove; when the first trigger mechanism is located at the locking position, the locking slide block is contained in the locking chute and clamped on the boss.

10. A safety injection needle according to claim 9, characterized in that: the displacement spout include first displacement spout and with the second displacement spout that first displacement spout interval set up, the bottom of first displacement spout with the bottom of second displacement spout communicates the setting each other, works as when first trigger mechanism slides to the locking position by initial position, spacing slider by first displacement spout slides to the second displacement spout, the locking slider slides and gets into the locking spout.

11. A safety injection needle according to claim 7, characterized in that: the first guide walls are at least two, the first guide walls enclose an accommodating cavity for accommodating the elastic element, a first abutting wall is arranged in the accommodating cavity, and the elastic element abuts between the first abutting wall and the needle seat.

12. A safety injection needle according to claim 11, characterized in that: the assembling portion is connected with a second trigger mechanism, the second trigger mechanism is provided with a second guide wall corresponding to the first guide wall and a second abutting wall corresponding to the first abutting wall, the elastic element is clamped between the first abutting wall and the second abutting wall, and when the elastic element is compressed, the first guide wall and the second guide wall interfere with each other, so that the first trigger mechanism rotates along the circumferential direction of the assembling portion.

13. A safety injection needle according to claim 12, characterized in that: the second trigger mechanism is connected with the assembling portion in a sliding mode, the second trigger mechanism is further provided with an elastic arm which is arranged at an interval with the second guide wall, the second abutting wall and the elastic arm penetrate through the assembling portion and can move along the axial direction and/or the circumferential direction of the assembling portion, a positioning block is arranged on the second abutting wall and/or the elastic arm, and a groove for accommodating the positioning block is correspondingly arranged on the assembling portion so as to limit the sliding/locking position between the second trigger mechanism and the assembling portion.

14. A safety injection needle according to claim 13, characterized in that: the locating piece is including setting up the second supports holds first locating piece on the wall/bullet arm and sets up second locating piece and third locating piece on the bullet arm, the recess is including being used for acceping the first recess of first locating piece/third locating piece with be used for acceping the second recess of third locating piece, definition fixed part place direction is the positive direction, first locating piece is located the top of third locating piece, the second locating piece is located the top of third locating piece, first recess is located the top of second recess.

15. A safety injection assembly comprising a safety needle and an injection device attached to the safety needle, wherein: the safety injection needle is detachably connected with the injection device, and the safety injection needle is the safety injection needle as claimed in any one of claims 1 to 14.

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