CN118416341B - Safety lock device of automatic injection pen and injection assembly - Google Patents
Safety lock device of automatic injection pen and injection assembly Download PDFInfo
- Publication number
- CN118416341B CN118416341B CN202410607092.3A CN202410607092A CN118416341B CN 118416341 B CN118416341 B CN 118416341B CN 202410607092 A CN202410607092 A CN 202410607092A CN 118416341 B CN118416341 B CN 118416341B
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- injection
- pen
- injection pen
- shell
- sleeve
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- 238000002347 injection Methods 0.000 title claims abstract description 168
- 239000007924 injection Substances 0.000 title claims abstract description 168
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 230000005284 excitation Effects 0.000 claims abstract description 7
- 229940071643 prefilled syringe Drugs 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides a safety lock device and an injection assembly of an automatic injection pen, which comprises a pen cap, wherein the pen cap is arranged on an injection pen body in a covering manner, the injection pen body comprises a shell, the pen cap is of a barrel-shaped structure, the radially outermost layer of the barrel-shaped structure is an annular wall, at least two short cantilevers and long cantilevers which are uniformly distributed around the central axis of the pen cap in sequence are arranged on the inner side of the annular wall, the long cantilevers are used for buckling and pre-filling an injector module, a long convex ring protruding out of the surface of the short cantilevers is arranged at the far end position of the short cantilevers, at least two uniformly distributed yielding notches are formed around the axial direction of a needle head protection sleeve, at least two semi-hidden grooves are uniformly distributed along the axis at the end part of the near body end of the shell, after the automatic injection pen is assembled, the short cantilevers are exactly arranged in the corresponding semi-hidden grooves, and the long convex rings are clamped with the corresponding yielding notches of the short cantilevers, so that the blocking function is realized, the false excitation of the injection pen is avoided, and the reliability before the injection pen is used is improved.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a safety lock device of an automatic injection pen and an injection assembly.
Background
Along with the development of technology and social progress, people put forward higher demands on the use of injection devices, and people hope that in the injection process, the operation steps are simple, and misoperation is avoided as much as possible. In practical operation, after the patient opens the syringe housing or pulls out the pen cap of the injection pen, the patient often cannot complete injection immediately due to the trivial effect, at this time, the patient can reclose the package of the injection device or cover the pen cap of the injection pen again, but the needle of the injection device is exposed to the air, and the long-time standing state can cause the deterioration of the liquid medicine and simultaneously cause cross infection. In addition, after the injection process is finished, once medical consumables are not processed correctly, an operator mistakenly covers the injection pen cap in the injection pen again, the original state of the injection pen before injection is restored, and the disposable injection pen can be reused.
For example, chinese patent CN115554529a discloses a pen cap and injection assembly, wherein a boss is convexly provided at a second end of a supporting column, the boss is bent toward the supporting column, when the pen cap body is covered on an injection pen, the boss blocks the needle cap, and in the process of pulling out the pen cap body, the boss drives the needle cap to separate the needle cap from the injection pen body through an opening.
According to the reliability requirement of national standard YY-T1768 about a medical needle type injection system, the requirements of the requirements on the reliability of the medical needle type injection system are met, more than three obvious container cracks cannot occur after a free falling test, and otherwise, the medical needle type injection system is judged to be unqualified. Although many products meet this requirement, damage to the product, failure of the injection function, after a free fall test, is a nuisance to the user.
Disclosure of Invention
In view of this, the present invention proposes a safety lock device and injection assembly of an automatic injection pen, comprising a pen cap 1, wherein the pen cap 1 is arranged on an injection pen body, the injection pen body comprises a housing 4, the housing 4 is of a cylindrical hollow structure, two ends of the housing 4 are a proximal end and a distal end, a needle protection sleeve 2 is sleeved in the housing 4, the needle protection sleeve 2 protrudes partially out of the proximal end of the housing 4, a prefilled syringe module 5 is sleeved in the needle protection sleeve 2, the pen cap 1 is of a barrel structure, and an annular wall 103 is arranged on the radially outermost layer of the barrel structure, and the safety lock device is characterized in that: the inside of the annular wall 103 is provided with at least two short cantilevers 102 and long cantilevers 101 which are uniformly distributed around the central axis of the pen cap 1 in sequence, the long cantilevers 101 are used for buckling the pre-filling and sealing syringe module 5, the far end position of each short cantilever 102 is provided with a long convex ring 121 protruding out of the surface of each short cantilever 102, the needle protection sleeve 2 is provided with at least two uniformly distributed abdicating notches 201 around the axial direction, the end part of the near-body end of the shell 4 is uniformly distributed with at least two semi-hidden grooves 401 along the axial direction, after the automatic injection pen is assembled, each short cantilever 102 is just placed in the corresponding semi-hidden groove 401 and the long convex ring 121 is clamped with the corresponding abdicating notch 201, so that the blocking function is realized, the false excitation of the injection pen is avoided, and the reliability before the use of the injection pen is improved.
The utility model provides a safety lock device of automatic injection pen, includes pen cap 1, pen cap 1 lid is established at injection pen body, injection pen body includes shell 4, shell 4 is cylindric hollow structure, the both ends of shell 4 are near body end and distal end, the shell 4 endotheca is equipped with syringe needle protection sleeve 2, syringe needle protection sleeve 2 partial bulge the near body end of shell 4, syringe needle protection sleeve 2 endotheca is equipped with prefilled syringe injector module 5, pen cap 1 is the barrel structure, radially outermost at barrel structure is annular wall 103, its characterized in that: the inside of the annular wall 103 is provided with at least two short cantilevers 102 and long cantilevers 101 which are uniformly distributed around the central axis of the pen cap 1 in sequence, the long cantilevers 101 are used for buckling the pre-filling and sealing syringe module 5, the far end position of each short cantilever 102 is provided with a long convex ring 121 protruding out of the surface of each short cantilever 102, the needle protection sleeve 2 is provided with at least two uniformly distributed abdicating notches 201 around the axial direction, the end part of the proximal end of the shell 4 is uniformly distributed with at least two semi-hidden grooves 401 along the axial direction, and after the automatic injection pen is assembled, each short cantilever 102 is just placed in the corresponding semi-hidden groove 401 and the long convex ring 121 is clamped with the corresponding abdicating notch 201, so that the blocking function is realized.
Further, the short cantilever 102 does not protrude from the annular wall 103 in the height direction.
Further, the cross-sectional structure of the long convex ring 121 includes a circle, a semicircle, an ellipse, a triangle, and a trapezoid.
In some embodiments, a slope structure 123 is disposed on a side wall surface of the short cantilever 102 near the annular wall 103, a slope structure 411 is disposed at a corresponding position of the semi-hidden groove 401, when the automatic injection pen is assembled, the long convex ring 121 of the short cantilever 102 is inserted into the abdication notch 201 of the needle protecting sleeve 2, the slope structure 123 of the short cantilever 102 corresponds to the slope structure 411 of the housing 4, so that the short cantilever 102 can enter a gap between the needle protecting sleeve 2 and the housing 4 through the guiding transition structure, and therefore, the short cantilever 102 cannot be biased in the radial direction of the automatic injection pen.
In some embodiments, the extending end of the short cantilever 102 is provided with a distal end face 122, the bottom of the semi-hidden groove 401 is provided with a stop structure 412, when the automatic injection pen is assembled, the distal end face 122 of the short cantilever 102 is arranged corresponding to the stop structure 412 of the housing 4, and when the pen cap 1 is inserted excessively, the distal end face 122 of the short cantilever 102 abuts against the stop structure 412 of the housing 4 to realize a blocking function.
In some embodiments, the position-stopping structure 211 is disposed near the proximal end of the position-stopping notch 201, and when the proximal end or the distal end of the automatic injection pen collides with the ground, the position-stopping structure 211 of the position-stopping notch 201 of the needle protecting sleeve 2 abuts against the lower edge of the long convex ring 121 of the short cantilever 102, thereby preventing the needle protecting sleeve 2 from moving further toward the distal end, and avoiding triggering the automatic injection pen to work because the displacement of the needle protecting sleeve 2 reaches or exceeds the excitation displacement.
In some embodiments, the proximal end of the pre-filled and sealed syringe module 5 near the housing 4 is provided with a needle, the needle is sleeved with a needle protecting sleeve, and the long cantilever 101 is provided with a long convex ring 111 at a distal end position for fastening the needle protecting sleeve of the pre-filled and sealed syringe module 5.
Further, the outer wall of the long cantilever 101 is provided with a positioning rib, a positioning groove is formed in the corresponding position of the needle head protection sleeve 2, and when the automatic injection pen is assembled, the positioning rib is connected with the positioning groove in a matched mode.
Further, the inner wall of the annular wall 103 is provided with a plurality of rib positions, the rib positions are arranged around the center of the annular wall 103 at intervals, the end part of the proximal end of the housing 4 is provided with an outer ring end face, and when the automatic injection pen is assembled, the lower end face of the rib position is positioned on the upper part of the outer ring end face.
An injection assembly comprises an injection pen body, wherein an opening is formed in the injection pen body, the pen cap is arranged on the injection pen to seal the opening, the injection pen further comprises a needle protection sleeve 2, a window 3, a shell 4, a pre-filling and sealing syringe module 5, an injection push rod 6, an injection spring 7, a guide sleeve 8, a trigger sleeve 9, an injection spring frame 10, a return spring 11, a trigger signal ring 12 and an end cover 13, the needle protection sleeve 2 is sleeved in the shell 4, part of the needle protection sleeve 2 protrudes out of the proximal end of the shell 4, the window 3 is sleeved in the needle protection sleeve 2, the window 3 is provided with a pre-filling and sealing syringe module 5, the bottom of the pre-filling and sealing syringe module 5 is sleeved with the injection push rod 6, the injection push rod 6 is sleeved with the injection spring 7, the outer portion of the pre-filling and sealing syringe module 5 is sleeved with the protection sleeve 2, the injection spring frame 10 penetrates through the injection spring frame 7, the injection spring frame 10 penetrates through the inner portion of the shell 7, the needle protection sleeve 7 is enabled to be abutted against the guide sleeve 9, the trigger sleeve 9 is abutted against one end of the trigger sleeve 9, and the other end of the trigger sleeve 9 is abutted against the trigger sleeve 10, and the trigger sleeve 10 is sleeved on the other end of the trigger sleeve 9.
The invention has the beneficial effects that: the invention provides a safety lock device and an injection assembly of an automatic injection pen, which comprises a pen cap 1, wherein the pen cap 1 is arranged on an injection pen body in a covering manner, the injection pen body comprises a shell 4, the pen cap 1 is of a barrel-shaped structure, the radially outermost layer of the barrel-shaped structure is an annular wall 103, at least two short cantilevers 102 and long cantilevers 101 which are uniformly distributed around the central axis of the pen cap 1 are arranged on the inner side of the annular wall 103, the long cantilevers 101 are used for clamping a pre-filling injector module 5, a long convex ring 121 protruding out of the surface of the short cantilever 102 is arranged at the far end position of the short cantilever 102, at least two uniformly distributed yielding notches 201 are formed around the axial direction of a needle protection sleeve 2, at least two semi-hidden grooves 401 are uniformly distributed at the end part of the near body end of the shell 4 along the axial direction, after the automatic injection pen is assembled, the short cantilever 102 is exactly arranged in the corresponding semi-hidden groove 401, and the long convex ring 121 is clamped with the corresponding yielding notch 201, so that a blocking function is realized, false excitation of injection is avoided, and the reliability before injection is improved.
Drawings
Fig. 1 is an exploded view of an injection assembly of an automatic injection pen of the present invention.
Fig. 2 is a schematic view of the structure of the cap of the automatic injection pen of the present invention.
Fig. 3 is a schematic view of the structure of the needle protecting sleeve of the automatic injection pen of the present invention.
Fig. 4 is a schematic structural view of a housing of the automatic injection pen of the present invention.
Fig. 5 is a cross-sectional view of an injection assembly of the automatic injection pen of the present invention.
Fig. 6 is a cross-sectional view of the automatic injection pen of the present invention after the automatic injection pen is assembled.
Fig. 7 is a cross-sectional view of the automatic injection pen of the present invention when the proximal or distal end of the automatic injection pen is impacted against the ground.
Fig. 8 is a cross-sectional view of the automatic injection pen of the present invention when the cap is required to be pulled out prior to injection of the automatic injection pen.
Fig. 9 is a cross-sectional view of the process of withdrawing the cap of the automatic injection pen of the present invention.
Fig. 10 is a cross-sectional view of the automatic injection pen of the present invention with the cap removed.
Fig. 11 is a partial enlarged view a of fig. 6.
Fig. 12 is a partial enlarged view B of fig. 7.
Fig. 13 is a partial enlarged view C of fig. 8.
Fig. 14 is a partial enlarged view D of fig. 9.
Fig. 15 is a partial enlarged view E of fig. 4.
Description of the main reference signs
A cap 1; a long cantilever 101; a long convex ring 111; a short cantilever 102; a long convex ring 121; a distal face 122; a ramp structure 123; an annular wall 103; a needle protection sleeve 2; a yield slot 201; a stop structure 211; a window 3; a housing 4; semi-hidden slot 401; a ramp structure 411; a stop structure 412; a pre-filled syringe module 5; an injection push rod 6; an injection spring 7; a guide sleeve 8; a trigger sleeve 9; an injection spring holder 10; a return spring 11; a trigger signal ring 12; end cap 13.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
Example 1:
As shown in fig. 2 and 5, the pen cap 1 has a barrel-shaped structure for accommodating the needle sheath of the prefilled syringe module 5, an annular wall 103 is arranged on the radially outermost layer of the barrel-shaped structure, and short cantilevers 102 and long cantilevers 101, the number of which is not less than two, are uniformly distributed around the central axis of the pen cap 1 in sequence inside the annular wall 103. The short cantilever 102 does not protrude from the annular wall 103 in the height direction, the distal end position of the short cantilever 102 is provided with a long convex ring 121, and the convex ring 121 is provided with a circular, semicircular, elliptic and other structural forms protruding from the surface of the short cantilever 102, which can realize blocking and transitional displacement. At the same time, the distal face 122 of the short cantilever 102 has a blocking function. A ramp structure 123 is provided on a side wall of the short cantilever 102 adjacent to the annular wall 103. The long cantilever 101 has a long convex ring 111 at the distal end position, and has the function of buckling and pre-filling the needle sheath of the syringe module 5.
As shown in fig. 3, the needle protecting sleeve 2 has at least two evenly distributed relief notches 201 around the axial direction, and this structure is correspondingly clamped with the long convex ring 121 of the short cantilever 102 of the pen cap 1 after the product is assembled.
As shown in fig. 4 and 15, the outer shell 4 has a cylindrical structure, and at least two semi-hidden grooves 401 are uniformly distributed along the axis at the end of the proximal end of the outer shell 4, and the semi-hidden grooves 401 have a slope structure 411 and a stop structure 412.
The innovations and advantages of the present invention are next presented from three scenario examples of auto-injection pens.
Scene one: packaging is completed
As shown in fig. 6 and 11, after the automatic injection pen is assembled, the long convex ring 121 of the short cantilever 102 is inserted into the abdication notch 201 of the needle protecting sleeve 2, and the slope structure 123 of the short cantilever 102 corresponds to the slope structure 411 of the housing 4, so that the short cantilever 102 can enter the gap between the needle protecting sleeve 2 and the housing 4 through the transition structure, and therefore, the short cantilever 102 cannot be biased in the radial direction of the automatic injection pen. The distal end face 122 of the short cantilever 102 corresponds to the stop structure 412 of the housing 4, and when the pen cap 1 is over-inserted, the distal end face 122 of the short cantilever 102 abuts against the stop structure 412 of the housing 4 to realize a blocking function.
Scene II: free drop test
As shown in fig. 7 and 12, when the proximal or distal end of the automatic injection pen is bumped against the ground, the cap 1 is moved toward the distal end, and when the distal end face 122 of the short cantilever 102 abuts against the stop structure 412 of the housing 4, no relative movement of the cap 1 and the automatic injection pen occurs. The needle protecting sleeve 2 is always far from the distal end in a free state due to the pressure of the return spring 11. When the proximal end or the distal end of the automatic injection pen bounces after striking the ground, and the inertial force transmitted to the needle protecting sleeve 2 exceeds the pressure of the return spring 11, the needle protecting sleeve 2 moves to the distal end, and the short cantilever 102 does not generate relative motion with the automatic injection pen in preference to the needle protecting sleeve 2. When the stop structure 211 of the yielding slot 201 of the needle protecting sleeve 2 abuts against the lower edge (the vertical direction of the automatic injection pen when the needle protecting sleeve falls freely) of the long convex ring 121 of the short cantilever 102, the needle protecting sleeve 2 is prevented from moving to the far end, and the automatic injection pen is prevented from being triggered to work because the displacement of the needle protecting sleeve 2 reaches or exceeds the excitation displacement.
Scene III: automatic injection process
Before the injection of the automatic injection pen, as shown in fig. 8 and 13, the pen cap 1 needs to be pulled out, the pen cap 1 drives the needle protecting sleeve of the pre-encapsulating syringe module 5 to move towards the proximal end together through the long convex ring 111 of the long cantilever arm 101, the pen cap 1 is divided into three steps in the pulling out process, the short cantilever arm 102 of the pen cap 1 is far away from the distal end, the distal end face 122 of the short cantilever arm 102 is separated from the stop structure 412 of the shell 4 until exceeding the proximal end face of the shell 4, the long convex ring 121 of the short cantilever arm 102 is abutted against the stop structure 211 of the yielding notch 201 of the needle protecting sleeve 2, at this time, the short cantilever arm 102 is separated from the gap between the shell 4 and the needle protecting sleeve 2, as shown in fig. 9 and 14, the long convex ring 121 of the short cantilever arm 102 is tangential to the outer wall surface of the needle protecting sleeve 2 by biasing outwards in the radial direction, until the pen cap 1 carries the needle protecting sleeve of the pre-encapsulating syringe module 5 to separate from the body of the automatic injection pen as shown in fig. 10.
When the automatic injection pen is used for injection, the user only needs to hold the shell of the automatic injection pen, press the proximal end against the skin surface until the needle protection sleeve 2 reaches the trigger position, the needle penetrates the skin, and simultaneously, the injection spring 7 is excited to complete the injection process.
As shown in fig. 1 and 5, an injection assembly comprises an injection pen body, wherein an opening is formed in the injection pen body, a prefilled syringe module 5 is sleeved in the window 3, an injection push rod 6 is sleeved at the bottom of the prefilled syringe module 5, an injection spring 7 is sleeved in the injection push rod 6, a guide sleeve 8, a trigger sleeve 9, an injection spring frame 10, a return spring 11, a trigger signal ring 12 and an end cover 13 are sleeved in the injection spring module 5, a needle protection sleeve 2 is sleeved in the housing 4, a part of the needle protection sleeve 2 protrudes out of the proximal end of the housing 4, a window 3 is sleeved in the needle protection sleeve 2, a prefilled syringe module 5 is sleeved in the window 3, an injection push rod 6 can slide in the prefilled syringe module 5, an injection spring 7 is sleeved outside the prefilled syringe module 5, an injection spring frame 10 penetrates through the injection spring 7, the injection spring frame 10, the trigger spring frame 10 penetrates through the inside the injection spring frame 7 and is abutted against the guide sleeve 8, the trigger sleeve 9 is abutted against the guide sleeve 10, and the trigger sleeve 9 is abutted against one end of the trigger sleeve 9, and the trigger sleeve 10 is abutted against one end of the trigger sleeve 9 is sleeved at the other end of the guide sleeve 9.
The invention has the beneficial effects that: the invention provides a safety lock device and an injection assembly of an automatic injection pen, which comprises a pen cap 1, wherein the pen cap 1 is arranged on an injection pen body in a covering manner, the injection pen body comprises a shell 4, the pen cap 1 is of a barrel-shaped structure, the radially outermost layer of the barrel-shaped structure is an annular wall 103, at least two short cantilevers 102 and long cantilevers 101 which are uniformly distributed around the central axis of the pen cap 1 are arranged on the inner side of the annular wall 103, the long cantilevers 101 are used for clamping a pre-filling injector module 5, a long convex ring 121 protruding out of the surface of the short cantilever 102 is arranged at the far end position of the short cantilever 102, at least two uniformly distributed yielding notches 201 are formed around the axial direction of a needle protection sleeve 2, at least two semi-hidden grooves 401 are uniformly distributed at the end part of the near body end of the shell 4 along the axial direction, after the automatic injection pen is assembled, the short cantilever 102 is exactly arranged in the corresponding semi-hidden groove 401, and the long convex ring 121 is clamped with the corresponding yielding notch 201, so that a blocking function is realized, false excitation of injection is avoided, and the reliability before injection is improved.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. The utility model provides a safety lock device of automatic injection pen, includes pen cap (1), pen cap (1) lid is established at injection pen body, injection pen body includes shell (4), shell (4) are cylindric hollow structure, the both ends of shell (4) are near body end and far away body end, shell (4) endotheca is equipped with syringe needle protection sleeve (2), syringe needle protection sleeve (2) partial bulge the near body end of shell (4), syringe needle protection sleeve (2) endotheca is equipped with embedment syringe module (5) in advance, pen cap (1) are barrel-shaped structure, radially outermost at barrel-shaped structure is annular wall (103), its characterized in that: the utility model discloses a pen cap, including annular wall (103), including annular wall (102), tip protection sleeve (2), tip protection sleeve is characterized in that the annular wall (103) is equipped with inside for being around at least two short cantilevers (102) and at least two long cantilevers (101) of pen cap (1) central axis evenly distributed, on the radial direction of perpendicular pen cap (1) central axis, short cantilevers (102) set up between annular wall (103) and long cantilevers (101), long cantilevers (101) are used for buckle prefilled syringe module (5), short cantilevers (102) distal end position is equipped with long bulge loop (121) protruding in short cantilevers (102) medial surface, tip protection sleeve (2) is equipped with at least two evenly distributed's groove of stepping down (201) around the axial, tip of the proximal end of shell (4) is along axis evenly distributed at least two semi-hidden grooves (401), after automatic injection pen equipment is accomplished, short cantilevers (102) just place in its corresponding semi-hidden groove (401) and its long bulge loop (121) and its corresponding groove (201) joint of stepping down, realize blocking function.
2. The safety lock device of an automatic injection pen according to claim 1, wherein: the cross section of the long convex ring (121) has a structure including a circle, a semicircle, an ellipse, a triangle and a trapezoid.
3. The safety lock device of an automatic injection pen according to claim 1, wherein: be close to annular wall (103) a side wall face at short cantilever (102) and be equipped with slope structure (123), the corresponding position in semi-hidden groove (401) is equipped with slope structure (411), when automatic injection pen equipment is accomplished, long bulge loop (121) of short cantilever (102) inserts in notch (201) of stepping down of syringe needle protection sleeve (2), slope structure (123) of short cantilever (102) correspond with slope structure (411) of shell (4), make short cantilever (102) accessible this direction transition structure get into the clearance between syringe needle protection sleeve (2) and the shell (4) to, make short cantilever (102) unable the taking place the biasing in automatic injection pen's radial.
4. The safety lock device of an automatic injection pen according to claim 1, wherein: the extension end of short cantilever (102) is equipped with distal end face (122), the bottom of semi-hidden groove (401) is equipped with and ends position structure (412), after automatic injection pen equipment is accomplished, distal end face (122) of short cantilever (102) correspond setting with stopping position structure (412) of shell (4), when pen cap (1) inserts excessively, distal end face (122) of short cantilever (102) supports stopping position structure (412) of shell (4), realizes blocking function.
5. The safety lock device of an automatic injection pen according to claim 1, wherein: the position keeping notch (201) is provided with a position keeping structure (211) near the near body end, when the near body end or the far body end of the automatic injection pen collides with the ground, the position keeping structure (211) of the position keeping notch (201) of the needle head protecting sleeve (2) props against the lower edge of the long convex ring (121) of the short cantilever (102), thereby preventing the needle head protecting sleeve (2) from continuously moving towards the far body end, and avoiding triggering the automatic injection pen to work because the displacement of the needle head protecting sleeve (2) reaches or exceeds the excitation displacement.
6. The safety lock device of an automatic injection pen according to claim 1, wherein: the needle is arranged at the proximal end of the pre-filling and sealing syringe module (5) close to the shell (4), a needle protecting sleeve is sleeved at the needle, and a long convex ring (111) is arranged at the distal end of the long cantilever (101) and used for clamping the needle protecting sleeve of the pre-filling and sealing syringe module (5).
7. The safety lock device of an automatic injection pen according to claim 1, wherein: the outer wall of the long cantilever (101) is provided with a positioning rib, a positioning groove is formed in the corresponding position of the needle head protection sleeve (2), and when the automatic injection pen is assembled, the positioning rib is connected with the positioning groove in a matched mode.
8. The safety lock device of an automatic injection pen according to claim 1, wherein: the inner wall of the annular wall (103) is provided with a plurality of rib positions, the rib positions are arranged around the center of the annular wall (103) at intervals, the end part of the near body end of the shell (4) is provided with an outer ring end face, and when the automatic injection pen is assembled, the lower end face of the rib positions is positioned on the upper part of the outer ring end face.
9. An injection assembly comprising an injection pen body and a pen cap of a safety lock device of an automatic injection pen according to any one of claims 1 to 8, wherein an opening is arranged on the injection pen body, a pen cap cover is arranged on the injection pen to seal the opening, the injection pen body further comprises a needle protection sleeve (2), a window (3), a shell (4), a prefilled syringe module (5), an injection push rod (6), an injection spring (7), a guide sleeve (8), a trigger sleeve (9), an injection spring frame (10), a return spring (11), a trigger signal ring (12) and an end cover (13), the shell (4) is internally sleeved with the needle protection sleeve (2), the needle protection sleeve (2) is partially protruded out of the proximal end of the shell (4), the needle protection sleeve (2) is internally sleeved with the window (3), the window (3) is internally sleeved with the prefilled syringe module (5), the bottom of the prefilled syringe module (5) is sleeved with the injection push rod (6), the injection push rod (6) can slide in the prefilled syringe (5), the injection spring (7) is internally sleeved with the injection spring (7), the injection spring frame (10) penetrates through the injection spring (7), one end of the injection spring (7) is abutted against the injection push rod (6), the other end of the injection spring is abutted against the injection spring frame (10), the guide sleeve (8) is sleeved outside the injection spring frame (10), the trigger sleeve (9) is sleeved outside the guide sleeve (8), the upper end of the trigger sleeve (9) is abutted against the needle protection sleeve (2), the trigger signal ring (12) and the end cover (13) are arranged at the lower end of the trigger sleeve, and the return spring (11) is sleeved outside the trigger sleeve (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410607092.3A CN118416341B (en) | 2024-05-16 | 2024-05-16 | Safety lock device of automatic injection pen and injection assembly |
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| CN202410607092.3A CN118416341B (en) | 2024-05-16 | 2024-05-16 | Safety lock device of automatic injection pen and injection assembly |
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| CN113350628A (en) * | 2021-07-19 | 2021-09-07 | 苏州嘉树生物医疗科技有限公司 | Pen cap anti-drop structure for self-administration device |
| CN114828919A (en) * | 2020-02-24 | 2022-07-29 | 苏州恒瑞宏远医疗科技有限公司 | Two-step automatic injection device |
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| EP2954914B1 (en) * | 2009-05-29 | 2018-11-21 | TecPharma Licensing AG | Injection device, especially auto-injector, comprising an anti-pricking mechanism and/or overload protection for a product container |
| CN209154759U (en) * | 2018-08-31 | 2019-07-26 | 上海久森医疗科技有限公司 | Automatically inject the locking mechanism and automatic injection pen of pen |
| WO2022077910A1 (en) * | 2020-10-16 | 2022-04-21 | 山东威高普瑞医药包装有限公司 | Automatic syringe |
| CN219558328U (en) * | 2022-03-30 | 2023-08-22 | 苏州赛卫生物科技有限公司 | Locking excitation mechanism and automatic injection pen thereof |
| EP4349385A1 (en) * | 2022-10-03 | 2024-04-10 | Becton Dickinson France | Autoinjector for automatic injection of a product into an injection site |
| CN115737991A (en) * | 2022-12-27 | 2023-03-07 | 苏州恒瑞宏远医疗科技有限公司 | Automatic injection pen |
| CN117100947A (en) * | 2023-08-23 | 2023-11-24 | 苏州恒瑞宏远医疗科技有限公司 | Housing assembly for an automatic injection device, spacing and anti-triggering method |
| CN117643660A (en) * | 2023-11-22 | 2024-03-05 | 上海新耀湃科医疗科技股份有限公司 | Prefilled automatic injection pen |
| CN117838988B (en) * | 2024-01-24 | 2024-09-06 | 苏州森恩博医疗科技有限公司 | False triggering preventing structure of automatic injection pen |
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| CN114828919A (en) * | 2020-02-24 | 2022-07-29 | 苏州恒瑞宏远医疗科技有限公司 | Two-step automatic injection device |
| CN113350628A (en) * | 2021-07-19 | 2021-09-07 | 苏州嘉树生物医疗科技有限公司 | Pen cap anti-drop structure for self-administration device |
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