CN117919547A - Fixed dose automatic injection pen - Google Patents

Abstract

The invention discloses a fixed dose automatic injection pen, comprising: the pen container is internally provided with a pen body, one end of the pen body is provided with a pen cap, one end of the pen container is provided with a pen container cap, the other end of the pen body is provided with a rear cap, and the rear cap is provided with a protection bolt; the pen comprises a pen body, a pen cover, a pen body, a pen cover and a pen cover, wherein a PFS sleeve container is arranged in the pen body and is clamped on the pen body, a PFS sleeve is arranged in the PFS sleeve container in a sliding mode, a soft protective cap is arranged on the PFS, a secondary power unit is arranged between the PFS sleeve and the rear cover, a trigger protection mechanism is arranged on the pen body, and the trigger mechanism is positioned between the pen cover and the PFS sleeve container; after the injection is finished, the trigger protection mechanism can rebound and lock up, so that the ejected needle is shielded, the needle is prevented from being still exposed to the outside, and the injury to users is easily caused.

Description

Fixed dose automatic injection pen

Technical Field

The invention relates to the technical field of injection pens, in particular to a fixed-dose automatic injection pen.

Background

Allergic reactions are an emergency situation in everyday life that may occur rapidly (most rapidly within minutes after exposure to an allergen) and even endanger life, and may be caused by a variety of allergens or triggers, typically including certain foods, insect bites, drugs and latex. Symptoms that produce allergic reactions vary, but symptoms that involve the skin (urticaria, itching, redness of the skin) are most common. Most cases also involve swelling of the lips and tongue and respiratory tract (tight throat, shortness of breath). Allergic reactions may also involve the gastrointestinal system (nausea, stomach pain, vomiting, diarrhea), the cardiovascular system (accelerated heartbeat, chest pain, hypotension) or the central nervous system (headache, confusion).

When epinephrine is used in the rescue of allergies, it can constrict blood vessels to increase blood pressure, relax pulmonary smooth muscles to reduce wheezing and improve respiration, stimulate the heart (increase heart rate) and reduce urticaria and swelling that may occur around the face and lips. Epinephrine is the only recommended first-line therapeutic for allergy according to national food allergy guidelines. Allergic attacks are an emergency situation in which emergency treatment plans need to be made in advance when potentially life-threatening allergic reactions (anaphylactic reactions) are involved. The program includes avoiding known allergens, identifying signs and symptoms of allergic reactions, preparing themselves for carrying emergency automatic injection pens at any time, and immediately seeking emergency medical assistance.

At present, the epinephrine injection in ampoule bottles is common in clinic and has very low price, but the use is complicated, which is unfavorable for clinical rescue. The pre-filled epinephrine is an epinephrine pen which stores a certain amount of epinephrine in the automatic injector, so that the epinephrine pen is rapid to use, and even patients can inject the epinephrine pen by themselves in an emergency state; the existing prefilled pen has the problem that the needle is still exposed to the outside after injection is completed, and the existing prefilled pen is easy to cause injury to users. Accordingly, there is a need for a fixed dose automatic injection pen that at least partially addresses the problems of the prior art.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above problems, the present invention provides a fixed dose automatic injection pen comprising:

The pen container is internally provided with a pen body, one end of the pen body is provided with a pen cap, one end of the pen container is provided with a pen container cap, the other end of the pen body is provided with a rear cap, and the rear cap is provided with a protection bolt;

The pen comprises a pen body, a pen cover and a pen body, wherein a PFS sleeve container is arranged in the pen body and is clamped on the pen body, a PFS sleeve is arranged in the PFS sleeve container in a sliding mode, a soft protective cap is arranged on the PFS, a secondary power unit is arranged between the PFS sleeve and the rear cover, a trigger protection mechanism is arranged on the pen body, and the trigger protection mechanism is located between the pen cover and the PFS sleeve container.

Preferably, the pen container cap is provided with a gear, the pen body is provided with a rack, and the gear is meshed with the rack;

the pen container is far away from pen container cap one end is equipped with the pothook, pothook and the draw-in groove joint of pen cap, evenly is equipped with a plurality of pen cap pothooks in the pen cap, and pen cap pothook card is on soft helmet.

Preferably, the inner wall of the rear cover is provided with a plug, two arc-shaped sheets are symmetrically arranged on the inner wall of the rear cover, two adjacent arc-shaped sheets are positioned between the plug, one side of each arc-shaped sheet, which is close to the plug, is provided with a bump, and one side, which is far away from the plug, of each arc-shaped sheet is provided with two limiting sheets.

Preferably, the secondary power pack includes:

the power pack main body is connected to the inner wall of the pen body in a sliding way, a groove is formed in one end, far away from the rear cover, of the power pack main body, a sliding hole is formed in the bottom end of the inner wall of the groove, two holes are formed in the power pack main body, a rear auxiliary spring is arranged between the rear covers of the power pack main body, a clamp is arranged in the power pack main body, and a piston push rod is arranged in the clamp;

the clamp comprises:

The connecting part is in sliding connection with the PFS sleeve, the connecting part is fixedly clamped with the PFS sleeve, the sliding part is arranged on the connecting part and extends into the sliding hole, two lug grooves are formed in the outer wall of the sliding part, the lugs are clamped in the lug grooves, a pushing rod hole is formed in the sliding part, two first sliding block grooves are formed in the inner wall of the pushing rod hole, a second sliding block groove is formed in the inner wall of the first sliding block groove, and the inner wall inclined surface of the second sliding block groove is a guiding inclined surface;

The piston push rod includes:

The pushing rod is connected in the pushing rod hole in a sliding way, two sliding blocks are arranged on the outer wall of the pushing rod and are positioned in the second sliding block groove, a pushing rod groove is arranged in the pushing rod, the inserted column stretches into the pushing rod groove, a main spring is arranged between the pushing rod groove and the rear cover, and the main spring is sleeved on the inserted column;

And one end of the piston rod is connected with the pushing rod, and the other end of the piston rod penetrates through the connecting part and stretches into the PFS.

Preferably, the PFS cartridge container comprises:

The container body is provided with two first blocking blocks, two arc-shaped elastic sheets are symmetrically arranged on the container body, and a second blocking block is arranged on the arc-shaped elastic sheets;

The tail end of the container main body is connected with the tail end of the container clamping hook, and two steps are arranged on the upper part and the lower part of the tail end of the container clamping hook and are clamped on the inner side steps in the pen body;

The two spring plate clamping grooves are symmetrically arranged on the container main body, the spring plate clamping grooves are positioned between the cylinder and the container clamping hook, spring plate clamping grooves are formed in the spring plate clamping grooves, supporting table grooves are formed in the spring plate clamping grooves, and spring plates are arranged in the spring plate clamping grooves;

two semicircular holes with small upper part and large lower part are arranged in the spring plate clamping groove;

the shrapnel comprises:

The supporting table is rotatably connected in the upper small and lower large semicircular holes in the elastic sheet clamping groove through the rotating shaft, one end of the supporting table extends into the supporting table groove, and the other end of the supporting sleeve is provided with a supporting arm and a negative angle clamping table.

Preferably, the trigger protection mechanism includes:

protective housing sliding connection is in the body of a pen, and the protective housing is located between second grade power pack and the pen cap, the protective housing includes:

The shell comprises a shell body, wherein one end of the shell body is provided with a via hole, the shell body is provided with a plurality of clamping table holes, the clamping table holes are matched with the negative angle clamping tables, two arc-shaped trigger plates are symmetrically arranged at the other end of the shell body, a first rectangular hole, a second rectangular hole and a third rectangular hole are arranged on the arc-shaped trigger plates side by side, the arc-shaped trigger plates are in butt joint with a power set, a first blocking block is positioned in the third rectangular hole, and a second blocking block is positioned in the first rectangular hole;

the container main body is positioned between two adjacent arc trigger plates;

the front auxiliary spring is arranged in the shell body, is positioned between the inner wall of the shell body and the container body and is close to the through hole.

Preferably, the protection bolt includes:

the plug body is of a cover-shaped structure, two cards are arranged on the outer wall of the plug body, the cards are runway-shaped, anti-skid patterns are arranged on the surfaces of the cards, and the plug body is connected with the pen body through the cards;

the protection sheet is stacked into on the inner wall of the bolt main body and is provided with two protection sheets, the protection sheet is positioned between the power unit main body and the arc-shaped sheet, and the protection sheet is also positioned between two adjacent limiting sheets.

Preferably, the protection bolt is provided with a warning label, and the pen body is provided with a plurality of pen body labels.

Preferably, the pen body is provided with a drug visual window, and the container body is provided with an observation hole corresponding to the drug visual window in position.

Preferably, one end of the pen container, which is far away from the pen container cover, is provided with detection holes corresponding to the detection holes on the pen container cover.

Compared with the prior art, the invention at least comprises the following beneficial effects:

1. According to the fixed-dose automatic injection pen, the pen body is pulled out by opening the pen container cap, when the pen container is pulled out, the pen container can take the pen cap off, then the protection bolt is pulled out, the trigger protection mechanism is extruded, the trigger protection mechanism can trigger the secondary power set, and the secondary power set moves to drive the PFS sleeve to slide in the PFS sleeve container, so that PFS is pushed out and injection is carried out; after the injection is finished, the trigger protection mechanism can rebound and lock up, so that the ejected needle is shielded, the needle is prevented from being still exposed to the outside, and the injury is easily caused by a user.

2. According to the invention, the pen container is opened and simultaneously, the pen body of the injection pen is automatically pulled out through the driving of the internal gear rack, and the PFS soft protective cap at the front end of the injection pen is pulled out.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the pen body according to the present invention;

FIG. 3 is an exploded view of the present invention;

FIG. 4 is a schematic view of a pen body according to the present invention;

FIG. 5 is a schematic view of the structure of the pull-out protection bolt of the present invention;

FIG. 6 is a schematic view of the structure of the PFS sleeve container of the present invention;

FIG. 7 is a schematic view of a piston push rod according to the present invention;

FIG. 8 is a schematic view of the structure of the clamp of the present invention;

FIG. 9 is a schematic view of the power pack body of the present invention;

FIG. 10 is a schematic structural view of a spring plate according to the present invention;

FIG. 11 is a schematic view of a guard bolt according to the present invention;

Fig. 12 is a schematic structural view of a protective case according to the present invention;

FIG. 13 is a schematic view of the structure of the rear cover of the present invention;

FIG. 14 is a schematic view of a pen container of the present invention;

FIG. 15 is a schematic view of a pen body according to the present invention;

FIG. 16 is a schematic view of the pull-out guard of the present invention;

FIG. 17 is a schematic view of the structure of the present invention at the time of needle ejection;

FIG. 18 is a schematic view of the PFS sleeve of the present invention;

FIG. 19 is a schematic and cross-sectional view of a PFS of the present invention;

FIG. 20 is a schematic view of a molding apparatus according to the present invention;

FIG. 21 is a schematic diagram of a detection mechanism according to the present invention;

FIG. 22 is a schematic view of a portion of a buffering device of the present invention;

FIG. 23 is a schematic view of a buffer device according to the present invention;

fig. 24 is a schematic side view of a cushioning device of the present invention.

Reference numerals illustrate: 1. a pen container; 2. a pen container cap; 3. a pen body; 4. a clamping hook; 5. a pen cap; 6. a gear; 7. a rack; 8. a pen cap clamping hook; 9. PFS sleeve containers; 10. a PFS sleeve; 11. PFS; 12. a rear cover; 13. a protection bolt; 14. a power pack main body; 15. opening holes; 16. a rear sub-spring; 17. inserting a column; 18. an arc-shaped sheet; 19. a sliding hole; 20. a groove; 21. a clamp; 23. a connection part; 24. a sliding part; 25. a bump groove; 26. a push rod hole; 27. a first slider groove; 28. a second slider groove; 29. a piston push rod; 30. a push rod; 31. a piston rod; 32. a sliding block; 33. a push rod groove; 34. a main spring; 35. a container body; 36. an observation hole; 37. an arc-shaped elastic sheet; 38. a second block; 39. a container hook; 40. a cylinder barrel; 41. a first block; 42. a spring clamping groove; 43. a spring plate; 44. a spring plate clamping groove; 45. a support table groove; 46. a support table; 47. a support arm; 48. a negative angle clamping table; 49. a protective shell; 50. a case main body; 51. a clamping table hole; 52. a first rectangular hole; 53. a second rectangular hole; 54. a third rectangular hole; 55. an arc trigger plate; 56. a front auxiliary spring; 57. a bolt body; 58. a card; 59. a protective sheet; 60. a warning paste; 61. a drug viewing window; 62. a soft protective cap; 63. a detection hole; 64. a pen body label; 101. a bump; 102. a step; 103. a semicircular hole with a smaller upper part and a larger lower part; 104. an inclined plane; 105. a limit step; 106. a limiting piece; 107. an inner step; 108. rectangular limit frames.

Detailed Description

The present invention is described in further detail below with reference to the drawings and examples to enable those skilled in the art to practice the invention by referring to the description.

It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1-19, the present invention provides a fixed dose automatic injection pen comprising:

the pen comprises a pen container 1, wherein a pen body 3 is arranged in the pen container 1, a pen cover 5 is arranged at one end of the pen body 3, a pen container cap 2 is arranged at one end of the pen container 1, a rear cover 12 is arranged at the other end of the pen body 3, and a protection bolt 13 is arranged on the rear cover 12;

The pen body 3 is internally provided with a PFS sleeve container 9, the PFS sleeve container 9 is clamped on the pen body 3, the PFS sleeve container 935 is internally provided with a PFS sleeve 10 in a sliding manner, the PFS sleeve 10 is internally provided with a PFS11, the PFS11 is provided with a soft protective cap 62, a secondary power unit is arranged between the PFS sleeve 10 and the rear cover 12, the pen body 3 is provided with a trigger protection mechanism, and the trigger protection mechanism is positioned between the pen cover 5 and the PFS sleeve container 9.

The technical scheme has the working principle and beneficial effects that: in the actual use process, the pen container cap 2 is opened to draw out the pen body 3, when the pen container cap 2 is pulled out, the pen container 1 can take off the pen cap 5, the pen cap 5 can pull out the soft protective cap 62 together, then the protective bolt 13 is pulled out horizontally, the protective shell is extruded to trigger the protective mechanism, the trigger protective mechanism can trigger the secondary power set, and the secondary power set moves to drive the PFS sleeve 10 to slide in the PFS sleeve container 9, so that the PFS11 is pushed out and injected; after the injection is finished, the trigger protection mechanism can rebound and lock up, so that the ejected needle is shielded, the needle is prevented from being still exposed to the outside, and secondary injury to users is easily caused.

In one embodiment, the pen container cap 2 is provided with a gear 6, the pen body 3 is provided with a rack 7, and the gear 6 is meshed with the rack 7;

The pen container 1 is provided with a clamping hook 4 at one end far away from the pen container cap 2, the clamping hook 4 is clamped with a clamping groove of the pen cap 5, a plurality of pen cap clamping hooks 8 are uniformly arranged in the pen cap 5, and the pen cap clamping hooks 8 are clamped on the soft protective cap 62.

The technical scheme has the working principle and beneficial effects that: in the actual use process, when the pen container cover 2 is opened and the pen container cap 2 rotates, the pen body 3 is driven to move a certain distance outside the pen container 1 through the gear 6 and the rack 7, so that the pen body 3 is conveniently taken out; meanwhile, the pen cap 5 is fixed by the clamping hook 4, so that the pen cap clamping hook 8 can automatically pull out the soft protective cap 62 when the pen body 3 is pulled out, redundant actions are not added before the use to pull out the soft protective cap, the operation flow is simplified, the operation error is avoided, and the use efficiency is improved.

In one embodiment, the inner wall of the rear cover 12 is provided with a post 17, two arc-shaped pieces 18 are symmetrically arranged on the inner wall of the rear cover 12, two adjacent arc-shaped pieces 18 are positioned between the posts 17, one side of each arc-shaped piece 18, which is close to the post 17, is provided with a bump 101, and one side of each arc-shaped piece 18, which is far away from the post 17, is provided with two limiting pieces 106.

The inner wall of the rear cover 12 is provided with a plurality of limiting steps 105.

The technical scheme has the working principle and beneficial effects that: the back cover 12 is fixedly connected with the pen body 3 and provides a supporting point for power for the secondary power unit, meanwhile, the convex blocks 101 are arranged on the arc-shaped sheet 18 and can play a limiting role on the secondary power unit, the secondary power unit is prevented from being triggered and started, meanwhile, the secondary power unit can be locked by being matched with the protection bolt 13, under the premise that the protection bolt 13 is not pulled out, even if the protection shell 49 is pressed, the triggering mechanism cannot trigger, and the stability of the whole injection pen is improved.

In one embodiment, the secondary power pack comprises:

The power pack main body 14 is slidably connected to the inner wall of the pen body 3, a groove 20 is formed in one end, far away from the rear cover, of the power pack main body 14, a sliding hole 19 is formed in the bottom end of the inner wall of the groove 20, two holes 15 are formed in the power pack main body 14, a rear auxiliary spring 16 is arranged between the rear covers 12 of the power pack main body 14, a clamp 21 is arranged in the power pack main body 14, and a piston push rod 29 is arranged in the clamp 21;

The jig 21 includes:

The connecting part 23 is slidably connected in the groove 20, the connecting part 23 is fixedly clamped with the PFS sleeve 10, the connecting part 23 is provided with a sliding part 24, the sliding part 24 stretches into the sliding hole 19, the outer wall of the sliding part 24 is provided with two lug grooves 25, the lug 101 is clamped in the lug groove 25, the sliding part 24 is internally provided with a push rod hole 26, the inner wall of the push rod hole 26 is provided with two first slide block grooves 27, the inner wall of the first slide block groove 27 is provided with a second slide block groove 28, and the inner wall inclined surface of the second slide block groove 28 is a guide inclined surface;

The piston push rod 29 includes:

the push rod 30 is slidably connected in the push rod hole 26, two sliding blocks 32 are arranged on the outer wall of the push rod 30, the sliding blocks 32 are positioned in the second sliding block groove 28, a push rod groove 33 is arranged in the push rod 30, the inserted post 17 extends into the push rod groove 33, a main spring 34 is arranged between the push rod groove 33 and the rear cover 12, and the main spring 34 is sleeved on the inserted post 17;

A piston rod 31, one end of the piston rod 31 is connected with the pushing rod 30, and the other end of the piston rod 31 passes through the connecting part 23 and extends into the PFS 11.

The technical scheme has the working principle and beneficial effects that: in the actual use process, after the protecting bolt 13 is pulled out, the triggering protecting mechanism is extruded, the triggering protecting mechanism can push the power pack main body 14 to move in the compression direction of the auxiliary spring 16, so that the power pack main body 14 and the clamp 23 relatively slide, when the opening 15 slides to the position above the convex block 101 of the arc-shaped piece 18, the limit of the power pack main body 14 is lost by the arc-shaped piece 18, under the action of the main spring 34, the main spring 34 drives the clamp 21 to move in the extending direction of the main spring 34 through the sliding block 32 on the pushing rod 30, meanwhile, the clamp 21 can drive the PFS sleeve 10 to move, so that the needle of the PFS11 is pushed out and penetrates into the injection part of a human body, after the clamp 21 drives the PFS sleeve 10 to move for a certain distance, the connecting part 23 of the clamp 21 can abut against the PFS container sleeve 9, so that the clamp 21 can not continuously drive the needle of the PFS11 to extend into the human body, and the tip of the needle is positioned at the optimal injection position; when the clamp 21 cannot move continuously, the sliding block 32 slides on the guiding inclined plane due to the fact that the inclined plane of the inner wall of the second sliding groove block 28 is the guiding inclined plane, so that the sliding block 32 slides into the first sliding block groove 27, the main spring 34 drives the push rod 30 and the clamp 21 to slide relatively, the piston rod 31 moves towards the extending direction of the main spring 34, the piston in the PFS11 is pushed to move, and the liquid medicine in the PFS11 is pushed out, so that injection is completed; the injection is completed by pushing the secondary power set, so that the injection process is designed to carry out needle outlet and then liquid medicine pushing out, the accuracy of liquid medicine dosage administration and the curative effect of intramuscular injection treatment can be ensured, and simultaneously, the medicine is injected at the optimal injection depth during each injection.

In one embodiment, the PFS cartridge container 9 comprises:

The container body 35, the PFS sleeve 10 is located in the container body 35, one end of the container body 35 is provided with a cylinder 40, the other end of the container body 35 is provided with a container clamping hook 39, the container clamping hook 39 is clamped on the pen body 3, two first blocking blocks 41 are arranged on the container body 35, two arc-shaped elastic pieces 37 are symmetrically arranged on the container body 35, and a second blocking block 38 is arranged on the arc-shaped elastic pieces 37;

the tail end of the container main body 35 is connected with the tail end of the container clamping hook 39, and two steps 102 are arranged on the upper and lower sides of the tail end of the container main body, and the steps 102 are clamped on an inner side step 107 in the pen body 3;

The two spring clip grooves 42 are symmetrically arranged on the container main body 35, the spring clip groove 42 is positioned between the cylinder 40 and the container clamping hook 39, a spring clip position groove 44 is arranged in the spring clip groove 42, a supporting table groove 45 is arranged in the spring clip groove 42, and the spring clip groove 42 is provided with a spring clip 43;

two semicircular holes 103 with small upper part and large lower part are arranged in the spring plate clamping groove 42;

The spring piece 43 includes:

The supporting table 46, in the big end down semicircle orifice 103 of supporting table 46 in connecting in shell fragment draw-in groove 42 through the pivot rotation, the one end of supporting table 46 stretches into in the supporting table groove 45, and the other end of supporting sleeve 46 is equipped with support arm 47 and negative angle draw-in groove 48, is equipped with inclined plane 104 on the negative angle draw-in groove 48.

The technical scheme has the working principle and beneficial effects that: in the actual use process, the connecting part 23 of the clamp 21 is limited by the clamping groove arranged in the container main body 35, so that the connecting part 23 cannot continue to move forwards after entering the moving distance of the container main body 35;

the container main body 35 can be fast clamped in the pen body through the elastic clamping hook 39, so that the pen is convenient to fast assemble during production; at the same time, the spring piece 43 can be matched with the triggering protection mechanism.

Because the supporting tables 46 are arranged on the two sides of the spring plate 43, the rotating shafts on the two sides of the spring plate can only rotate clockwise in the rotating shaft holes of the container main body, when the pressing protection shell is started, the clamping table holes 51 on the protection shell press the inclined surfaces 104 of the negative angle clamping tables of the spring plate 43, the spring plate is pressed and rotated clockwise around the shaft, the negative angle clamping tables 48 of the spring plate are separated from the clamping table holes 51, the PFS sleeve 10 moves to the lower part of the spring plate 43, the cylindrical surface outside the PFS sleeve 10 presses the lower part of the spring plate 43, the negative angle clamping tables 48 of the spring plate 43 can not hook the protection shell, and the protection shell can be popped out for stroke protection.

In one embodiment, the trigger guard mechanism comprises:

protective housing 49 sliding connection is in body 3, and protective housing 49 is located between second grade power pack and the pen cap 5, protective housing 49 includes:

The shell comprises a shell main body 50, wherein one end of the shell main body 50 is provided with a via hole, the shell main body 50 is provided with a plurality of clamping holes 51, the clamping holes 51 are matched with the negative angle clamping table 48, the other end of the shell main body 50 is symmetrically provided with two arc-shaped trigger plates 55, a first rectangular hole 52, a second rectangular hole 53 and a third rectangular hole 54 are arranged on the arc-shaped trigger plates 55 side by side, the arc-shaped trigger plates 55 are abutted with a power unit, the first blocking block 41 is positioned in the third rectangular hole 54, and the second blocking block 38 is positioned in the first rectangular hole 52;

The container body 35 is located between two adjacent arcuate trigger plates 55;

Front sub-spring 56, front sub-spring 56 is provided in case main body 50, front sub-spring 56 is provided between the inner wall of case main body 50 and container main body 35, and front sub-spring 56 is provided near the through hole.

The technical scheme has the working principle and beneficial effects that: in the practical use process, when injection is carried out, the front end of the protective shell 49 is contacted with the injection part and extruded, the pen body 3 of the protective shell 49 can slide relatively, in the process, the negative angle clamping table 48 is designed in a negative angle, when the negative angle clamping table 48 is extruded, the negative angle clamping table 48 is withdrawn from the clamping table hole 51, and the supporting arm 47 of the elastic sheet 43 is collected and extruded to deform, so that the protective shell 49 moves in the compression direction of the rear auxiliary spring 16, the triggering plate 55 of the protective shell 49 can push the power pack main body 14 to move, thereby triggering the secondary power pack to start injection; during the movement of the trigger plate 55, the second block 38 slides in the first rectangular hole 52, the first block 41 slides in the third rectangular hole 54, and after a certain distance of sliding, the first block 41 and the second block 38 respectively abut against the edges of the third rectangular hole 54 and the first rectangular hole 52, so that the protective shell 49 cannot continue to move inwards, and the injection position is prevented from being too deep; after the injection is finished, when the needle of the PFS11 is pulled out, the front auxiliary spring 56 is subjected to recovery deformation, and the protective shell 49 is driven to move in the direction away from the PFS sleeve container 9; in this process, the second blocking block 38 will squeeze the arc-shaped elastic sheet 37 and then enter the second rectangular hole 53, and the first blocking block 41 will withdraw from the third rectangular hole 54, so as to prop the protective shell 49 against, and prevent the protective shell 49 from moving towards the PFS sleeve container 9 after the injection is completed, so that the extracted needle is limited in the protective shell 49, and the needle is prevented from being exposed, and damage is caused to the user.

When the protection shell is pressed to start the first-stage needle outlet, the protection shell is pressed, the tail end of the protection shell pushes the power pack main body to move, the power pack main body moves to the position of the limiting step 105 to stop, and the limiting step 105 limits the pressing distance.

In one embodiment, the guard bolt 13 comprises:

The pen comprises a pen body 57, wherein the pen body 57 is of a cover-shaped structure, two clamping pieces 58 are arranged on the outer wall of the pen body 57, the clamping pieces 58 are in a runway shape, anti-skid patterns are arranged on the surfaces of the clamping pieces 58, and the pen body 57 is connected with a pen body 3 through the clamping pieces;

the protection sheet 59 is stacked on the inner wall of the bolt body 57 to form two protection sheets 59, the protection sheet 59 is positioned between the power unit body 14 and the arc-shaped sheet 18, and the protection sheet 59 is also positioned between two adjacent limiting sheets 106.

The technical scheme has the working principle and beneficial effects that: the card 58 is provided with anti-slip patterns, so that the protection bolt is conveniently taken out during use, and meanwhile, when the protection bolt 13 is not pulled out, the protection sheet 59 of the protection bolt 13 can be positioned between the arc-shaped sheet 18 and the power pack main body 35, and the convex blocks 101 on the arc-shaped sheet 18 are further limited, so that the secondary power pack cannot be triggered; and the limiting piece 106 on the arc piece 18 limits the protecting piece 59. The upper part of the arc-shaped sheet is limited by the inner wall of the power pack main body 14, so that even if the protection bolt is pulled out, the arc-shaped sheet 18 is still restrained with the inner wall of the sleeve of the power pack main body 14, and the protection shell still needs to be pressed for starting.

In one embodiment, the guard 13 is provided with a warning label 60, and the pen body 3 is provided with a plurality of pen body labels 64.

The technical scheme has the working principle and beneficial effects that: through the design of the structure, the warning label 60 and the pen body label 64 are arranged, so that a user can conveniently know various information of the injection pen in time.

In one embodiment, the pen body 3 is provided with a medicine viewing window 61, and the container body 35 is provided with a viewing hole 36, and the viewing hole 36 corresponds to the medicine viewing window 61.

The technical scheme has the working principle and beneficial effects that: the medicine viewing window 61 and the observation hole 36 are arranged to facilitate the user to observe the medicine. And (5) confirming whether the medicine is turbid, discolored and deteriorated, and judging whether the injection pen needs to be replaced or not.

In one embodiment, the end of the pen container 1 away from the pen cap 2 and the pen cap 5 are provided with detection holes 63, and the pen container 1 corresponds to the detection holes on the pen cap 5.

The technical scheme has the working principle and beneficial effects that: the detection hole 63 can be inserted into the detector to push the trigger protection mechanism when the pen body 3 is arranged in the pen container 1, so that whether the power unit is locked or not is judged. Judging whether the accumulated elastic force of the front auxiliary spring and the rear auxiliary spring is within the specification and whether each matching piece can slide incongruously to cause the problem of overlarge resistance.

In one embodiment, the PFS sleeve 10 is cylindrical, two rectangular limiting frames 108 are arranged on the outer wall of the PFS sleeve 10, and the rectangular limiting frames 108 are slidably connected in the PFS sleeve container 9;

The technical scheme has the working principle and beneficial effects that: the rectangular stop frame 108 provides a stop for the PFS sleeve 10.

In one embodiment, the pre-filled and sealed syringe PFS uses a conventional disposable pre-filled and sealed syringe, and only the needle is required to be replaced, so that the production process is greatly reduced, the yield is improved, the cost is reduced, and in addition, the pre-filled and sealed syringe has small volume, does not occupy space, can reliably provide accurate medicine dosage and has low pollution risk.

Advantages are:

the conventional slender PFS is used, only the needle is replaced, so that the processing technology difficulty of the medicine package material is greatly reduced, and the purchasing period is shortened.

The conventional slender PFS is sealed by a silica gel soft protective cap before use, so that the sealing property of the liquid medicine is ensured, the liquid medicine is not polluted, and the soft protective cap is pulled out without adding redundant actions before use.

The two-step operation mode consistent with the original pen is suitable for habitual operation of patients and medical staff, and reduces the occurrence of using errors.

As shown in fig. 20-24, the present invention also provides a process for producing a fixed dose automatic injection pen, comprising the steps of:

step 1: changing the die on the forming device according to the required elements:

Step 2: starting a forming device, injection molding a corresponding element, and cleaning the surface of the element:

Step 3: selecting corresponding elements for assembly, mounting a triggering protection mechanism, a secondary power set and a PFS on a PFS sleeve container, mounting the triggering protection mechanism, the secondary power set and the PFS in a pen body together with a rear cover and a protection bolt, covering the pen cover, enabling a soft protective cap of the PFS to be clamped in a pen cap clamping hook, and then pasting a pen body label;

step 4: the assembled pen body is inserted into the pen container, so that the pen container is connected with the pen cap, and the pen container cap is installed, thereby completing production.

In one embodiment, a molding apparatus includes:

the injection molding machine 70, an injection molding cavity 74 is arranged in the injection molding machine 70, a movable mold 71 and a fixed mold 72 are arranged in the injection molding cavity 74, the fixed mold 72 is connected with the inner wall of the injection molding cavity 74 through a mounting block 73, molding cavities 75 are arranged on the fixed mold 72 and the movable mold 71, and the injection molding machine 70 is electrically connected with a controller;

the detection mechanism is arranged in the mounting block 73, and comprises:

One end of the air inlet pipe 76 is connected with the forming cavity 75, the other end of the air inlet pipe 76 penetrates through the mounting block 73, a pressure valve 77 and an air quantity sensor 78 are arranged in the air inlet pipe 76, and the air quantity sensor 78 is electrically connected with the controller;

The conical cavity 79 is arranged in the mounting block 73, the conical cavity 79 is positioned below the air inlet pipe 76, a blocking plug 81 is slidably connected in the conical cavity 79, one side of the blocking plug 81 is flush with the inner wall of the forming cavity 74, a fixed plate 83 is arranged on the inner wall of the conical cavity 79, and a detection spring 84 and a telescopic rod 82 are arranged between the fixed plate 83 and the blocking plug 81;

And one end of the air extraction pipe 80 is connected with the conical cavity 79, and the other end of the air extraction pipe 80 is connected with an air extractor.

The technical scheme has the working principle and beneficial effects that: after the fixed die 72 and the movable die 71 are combined, an air extractor is started, and the air extractor drives air to be discharged from the conical cavity 79 through the air exhaust pipe 80, so that negative pressure is formed in the conical cavity 79, the blocking plug 81 moves towards the compression direction of the spring 84, the air in the forming cavity 75 is pumped away, and the forming cavity 75 forms negative pressure; when the molding cavity 75 is in good sealing effect, air enters the molding cavity 75 through the air inlet pipe 76, and at the moment, the air quantity sensor 78 detects a numerical value, which indicates that the air tightness of the molding cavity 75 is good, and the injection molding machine performs injection molding into the molding cavity 75 to produce elements; when the numerical value cannot be detected, the tightness of the molding cavity 75 is poor, the injection molding machine cannot perform injection molding, and meanwhile, a prompt is sent to remind a worker to detect, so that the phenomenon that the plastic liquid is injected into the molding cavity 75 and leaks outwards due to inaccurate buckling of a movable mold and a fixed grinding tool or deformation of the mold is avoided, the element is failed to be molded, and the cost is saved.

In one embodiment, a cushioning device is also provided within injection cavity 74, the cushioning device comprising:

The belt conveyor 98, the belt conveyor 98 is arranged in the injection cavity 74, and the belt conveyor 98 is uniformly provided with transverse bars 99;

The fixed plate 91, the fixed plate 91 both ends are parallel to locate in the injection cavity 74 through the branch, the bottom of the fixed plate 91 is parallel to locate the adjusting plate 92, the bottom of the fixed plate 91 has shooting visual detectors;

One end of each T-shaped rod 96 is connected with the top end of each adjusting plate 92, the other end of each T-shaped rod 96 penetrates through each fixing plate 91, and an adjusting spring 97 is arranged between each T-shaped rod 96 and each fixing plate 91;

The rotating rod 95, one end of the rotating rod 95 is connected with a motor, the motor is arranged at the top end of the fixed plate 91, the other end of the rotating rod 95 is connected with the pressing wheel 94, the rotating rod 95 rotates to pass through the auxiliary block, the auxiliary block is fixedly arranged at the top end of the fixed plate 91, and the pressing wheel 94 passes through the fixed plate 91 to be in butt joint with the top end of the adjusting plate 92;

The mounting block 89, the mounting block 89 is fixedly arranged on the inner wall of the injection cavity 74, the mounting block 89 is provided with a component via hole 100, two electric telescopic rods 88 are symmetrically arranged on the inner wall of the component via hole 100, and the electric telescopic rods 88 are provided with lower connecting strips 87;

The bottom ends of the fixed die 72 and the movable die 71 are respectively provided with an upper connecting strip 85;

The two sides of the top end of the flexible cloth bag 86 are respectively connected with the two adjacent upper connecting strips 85, and the two sides of the bottom end of the flexible cloth bag 86 are respectively connected with the two adjacent lower connecting strips 87;

The air ejector 90, a plurality of air ejector 90 one end is connected with flexible sack 86 bottom inner wall, and the other end of air ejector 90 is connected with the fan.

The technical scheme has the working principle and beneficial effects that: in the actual use process, when the fixed die 72 and the movable die 71 are processed and separated, the movable die 71 drives one side of the top end of the flexible cloth bag 86 to move, so that the flexible cloth bag 86 is opened, after the die is opened, the internal element falls into the flexible cloth bag 86, the element is firstly decelerated and cleaned by the gas sprayed by the gas spraying pipe 90 in the falling process, and meanwhile, the gas is further cooled by the element, so that the inside and detail positions of the element are rapidly cooled and shaped, the element is thoroughly shaped, deformation is avoided, the shaped element can deform a little when contacting the flexible cloth bag 86, the falling element is buffered, the element is prevented from directly falling onto the conveying mechanism to deform, and the yield of the forming device is improved; after the gas drops originally, the gas sprayed by the gas spraying pipe 90 sprays and washes the inner wall of the die through the flexible cloth bag 86, so that the influence of the residue in the die on the production of subsequent elements during subsequent processing is avoided; the flexible cloth bag 86 is tightly attached to the die to prevent the components from falling around; after the components fall, the electric telescopic rod 88 contracts, so that the bottom end of the flexible cloth bag 86 is opened, the components fall onto the belt conveyor 98 to be transmitted, then visual detection is carried out when the components pass through the visual detector, in the process, the motor drives the pressing wheel 94 to rotate through the rotating rod 95, and the adjusting plate 82 is driven to move up and down when the pressing wheel 94 rotates, so that the components can be subjected to fine adjustment of the gravity center position in sequence, the positions of the components on the photo discharged by the visual detector 93 are approximate to those of a standard file, comparison is convenient, and defective products are conveniently screened out.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (10)

1. A fixed dose automatic injection pen, comprising:

the pen comprises a pen container (1), wherein a pen body (3) is arranged in the pen container (1), a pen cover (5) is arranged at one end of the pen body (3), a pen container cap (2) is arranged at one end of the pen container (1), a rear cover (12) is arranged at the other end of the pen body (3), and a protection bolt (13) is arranged on the rear cover (12);

Be equipped with PFS sleeve container (9) in pen body (3), PFS sleeve container (9) joint is on pen body (3), and PFS sleeve container (935) are slided and are equipped with PFS sleeve (10), are equipped with PFS (11) in PFS sleeve (10), are equipped with soft protection cap (62) on PFS (11), be equipped with second grade power pack between PFS sleeve (10) and back lid (12), be equipped with on pen body (3) and trigger protection mechanism, trigger protection mechanism is located between pen lid (5) and PFS sleeve container (9).

2. A fixed dose automatic injection pen according to claim 1 wherein,

A gear (6) is arranged on the pen container cap (2), a rack (7) is arranged on the pen body (3), and the gear (6) is meshed with the rack (7);

One end of the pen container (1) far away from the pen container cap (2) is provided with a clamping hook (4), the clamping hook (4) is clamped with a clamping groove of the pen cap (5), a plurality of pen cap clamping hooks (8) are uniformly arranged in the pen cap (5), and the pen cap clamping hooks (8) are clamped on the soft protective cap (62).

3. A fixed dose automatic injection pen according to claim 1 wherein,

The novel rear cover is characterized in that an inserting column (17) is arranged on the inner wall of the rear cover (12), two arc-shaped pieces (18) are symmetrically arranged on the inner wall of the rear cover (12), two adjacent arc-shaped pieces (18) are located between the inserting columns (17), a bump (101) is arranged on one side, close to the inserting columns (17), of each arc-shaped piece (18), and two limiting pieces (106) are arranged on one side, far away from the inserting columns (17), of each arc-shaped piece (18).

4. A fixed dose automatic injection pen according to claim 3 wherein,

The secondary power pack includes:

The power pack comprises a power pack main body (14), wherein the power pack main body (14) is slidably connected to the inner wall of a pen body (3), a groove (20) is formed in one end, far away from a rear cover, of the power pack main body (14), a sliding hole (19) is formed in the bottom end of the inner wall of the groove (20), two holes (15) are formed in the power pack main body (14), a rear auxiliary spring (16) is arranged between the rear covers (12) of the power pack main body (14), a clamp (21) is arranged in the power pack main body (14), and a piston push rod (29) is arranged in the clamp (21);

The jig (21) includes:

The connecting part (23), connecting part (23) sliding connection is in recess (20), connecting part (23) and PFS sleeve (10) fixed joint are equipped with sliding part (24) on connecting part (23), sliding part (24) stretches into in slide hole (19), be equipped with two lug grooves (25) on the outer wall of sliding part (24), lug (101) card is in lug groove (25), be equipped with push rod hole (26) in sliding part (24), be equipped with two first slider grooves (27) on the inner wall of push rod hole (26), be equipped with second slider groove (28) on the inside wall of first slider groove (27), the inner wall inclined plane of second slider groove (28) is the direction inclined plane;

the piston push rod (29) comprises:

the push rod (30), the push rod (30) is connected in the push rod hole (26) in a sliding way, two sliding blocks (32) are arranged on the outer wall of the push rod (30), the sliding blocks (32) are positioned in the second sliding block groove (28), a push rod groove (33) is arranged in the push rod (30), the inserted column (17) stretches into the push rod groove (33), a main spring (34) is arranged between the push rod groove (33) and the rear cover (12), and the main spring (34) is sleeved on the inserted column (17);

the piston rod (31), one end of the piston rod (31) is connected with the pushing rod (30), and the other end of the piston rod (31) penetrates through the connecting part (23) and stretches into the PFS (11).

5. A fixed dose automatic injection pen according to claim 1 wherein,

The PFS cartridge container (9) comprises:

The pen comprises a container body (35), a PFS sleeve (10) is positioned in the container body (35), a cylinder (40) is arranged at one end of the container body (35), a container clamping hook (39) is arranged at the other end of the container body (35), the container clamping hook (39) is clamped on a pen body (3), two first blocking blocks (41) are arranged on the container body (35), two arc-shaped elastic pieces (37) are symmetrically arranged on the container body (35), and a second blocking block (38) is arranged on the arc-shaped elastic pieces (37);

The tail end of the container main body (35) is connected with the tail end of the container clamping hook (39) and is provided with two steps (102) up and down, and the steps (102) are clamped on an inner side step (107) in the pen body (3);

The two spring plate clamping grooves (42) are symmetrically arranged on the container main body (35), the spring plate clamping grooves (42) are positioned between the cylindrical barrel (40) and the container clamping hook (39), spring plate clamping grooves (44) are formed in the spring plate clamping grooves (42), supporting table grooves (45) are formed in the spring plate clamping grooves (42), and spring plates (43) are arranged in the spring plate clamping grooves (42);

two semicircular holes (103) with small upper part and large lower part are arranged in the spring plate clamping groove (42);

the elastic sheet (43) comprises:

The supporting table (46), in the big end down semicircle orifice (103) in shell fragment draw-in groove (42) is rotated through the pivot to supporting table (46), in one end of supporting table (46) stretches into supporting table groove (45), the other end of supporting sleeve (46) is equipped with support arm (47) and negative angle draw-in table (48).

6. A fixed dose automatic injection pen according to claim 5 wherein,

The trigger protection mechanism includes:

protective housing (49) sliding connection is in body (3), and protective housing (49) are located between second grade power group and pen cap (5), protective housing (49) include:

The shell comprises a shell body (50), wherein a via hole is formed in one end of the shell body (50), a plurality of clamping table holes (51) are formed in the shell body (50), the clamping table holes (51) are matched with the negative angle clamping tables (48), two arc-shaped trigger plates (55) are symmetrically arranged at the other end of the shell body (50), a first rectangular hole (52), a second rectangular hole (53) and a third rectangular hole (54) are formed in the arc-shaped trigger plates (55) side by side, the arc-shaped trigger plates (55) are abutted to a power unit, a first blocking block (41) is located in the third rectangular hole (54), and a second blocking block (38) is located in the first rectangular hole (52);

the container body (35) is positioned between two adjacent arc-shaped trigger plates (55);

The front auxiliary spring (56) is arranged in the shell main body (50), the front auxiliary spring (56) is arranged between the inner wall of the shell main body (50) and the container main body (35), and the front auxiliary spring (56) is arranged close to the through hole.

7. A fixed dose automatic injection pen according to claim 6 wherein,

The protection plug (13) comprises:

The pen comprises a pen body (3) and a pen body (57), wherein the pen body (57) is of a cover-shaped structure, two clamping pieces (58) are arranged on the outer wall of the pen body (57), the clamping pieces (58) are in a runway shape, anti-slip patterns are arranged on the surfaces of the clamping pieces (58), and the pen body (57) is connected with the pen body through the clamping pieces;

the protection sheet (59) is piled up to be equipped with two protection sheets (59) on the inner wall of bolt main part (57), and protection sheet (59) are located between power pack main part (14) and arc piece (18), and protection sheet (59) still is located between two adjacent spacing piece (106).

8. A fixed dose automatic injection pen according to claim 1 wherein,

The pen body (3) is provided with a plurality of pen body labels (64).

9. A fixed dose automatic injection pen according to claim 1 wherein,

The pen body (3) is provided with a medicine visual window (61), the container body (35) is provided with an observation hole (36), and the observation hole (36) corresponds to the medicine visual window (61).

10. A fixed dose automatic injection pen according to claim 1 wherein,

One end of the pen container (1) far away from the pen container cover (2) and the pen container cover (5) are respectively provided with a detection hole (63), and the positions of the pen container (1) and the detection holes (63) on the pen container cover (5) correspond to each other.