CN113244484A

CN113244484A - Controllable-dose rapid injection device for battlefield analgesia

Info

Publication number: CN113244484A
Application number: CN202110400778.1A
Authority: CN
Inventors: 周玲君; 王珂男; 傅志远; 邢翔皓; 桂莉; 唐红玉
Original assignee: Second Military Medical University SMMU
Current assignee: Second Military Medical University SMMU
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-08-13

Abstract

The invention relates to a dose-controllable battlefield analgesia rapid injection device, which comprises a hollow pen body and an internal compression spring thereof, wherein one end of the pen body penetrates out of a pressing rod, the other end of the pen body is provided with a needle head, the pressing rod is abutted against the head end of the compression spring in the pen body, and the tail end of the compression spring is abutted against a bulge on the inner wall of the pen body; the needle head is communicated with one end of a medicine bin in the pen body, and the other end of the medicine bin is provided with a pressing part for extruding the content in the medicine bin; a ratchet strip is further arranged between the pressing rod and the inner wall of the pen body, the top end of the ratchet strip is abutted against the pressing part of the medicine bin, and a non-return ratchet for pushing the ratchet strip towards the medicine bin is arranged beside the pressing rod. The invention has the advantages that the injection convenience and the injection dosage controllability are improved and the injection difficulty in a battlefield environment is reduced through the control setting of the storage type medicine bin and the pressing frequency.

Description

Controllable-dose rapid injection device for battlefield analgesia

Technical Field

The invention relates to the field of battlefield medical care, in particular to a rapid injection device which can be matched with a preset medicine bin, has controllable dosage and is protected by a needle head.

Background

Severe pain is one of the most common symptoms of war wounds, and a large number of researches show that early-stage pain of war wounds has great influence on the physiology, psychology, rehabilitation and other aspects of organisms, and the self-rescue mutual-rescue analgesic administration of the wounds or the quick analgesic administration of rescuers needs to be realized in the early stage.

At present, the injection administration is still the main mode for easing pain in early stage of trauma, such as common morphine injection and ketamine injection. At present, in emergency situations, particularly for moderate and severe pain, the conventional injection type analgesic drug is difficult to complete in first-line treatment of the wounded, the drug needs to be extracted from an ampoule bottle into a syringe on a battlefield and then is injected intramuscularly or intravenously, the operation steps are complex, and the time consumption is long; and it is difficult for soldiers to control the injection dosage when injecting the analgesic drug. Accordingly, there is a need for an injection device that is adaptable to a battlefield environment, easy to operate, pre-set, reusable, and easy to control the amount of injected dose.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and solve the problems that the injection operation of the analgesic drug in the battlefield is complex and consumes long time and the pain management requirements of group wounded persons cannot be met.

In order to achieve the purpose, the invention provides a dose-controllable battlefield analgesia rapid injection device, which comprises a hollow pen body and a compression spring arranged in the pen body, wherein one end of the pen body penetrates out of a pressing rod, the other end of the pen body is provided with a needle head, the pressing rod is abutted against the head end of the compression spring arranged in the pen body, and the tail end of the compression spring is abutted against a bulge on the inner wall of the pen body; the needle head is communicated with one end of a medicine bin in the pen body, and the other end of the medicine bin is provided with a pressing part for extruding the content in the medicine bin; a ratchet strip is further arranged between the pressing rod and the inner wall of the pen body, the top end of the ratchet strip is abutted against the pressing part of the medicine bin, and a non-return ratchet for pushing the ratchet strip towards the medicine bin is arranged beside the pressing rod.

When the pressing rod is pressed from the outside, the pressing rod drives the ratchet to move downwards and compresses the spring, and when the external force is removed, the spring pushes the pressing rod to move upwards, the ratchet is kept in place, and the pressing rod is reset; when the pressing rod is pressed from the outside again, the above-mentioned flow is continued. The pen body is generally provided in a cylindrical shape. The ratchet bar is matched with the non-return ratchet. The ratchet referred to here can be in the form of a simple elastic triangle, and can also be in the form of matching with other elastic blocks, hard triangle blocks and the like.

Preferably, the protrusion is in the shape of a transverse partition plate in the pen body, and the partition plate is provided with a through hole for the penetration of the ratchet.

The pen body is internally divided into an upper cavity for accommodating the spring and a lower cavity for accommodating the medicine bin by a bulge. The ratchets can pass through the through holes without obstruction. The other end of the pen body, namely the tail end of the lower cavity, can be arranged into a lower end cover with a needle head, so that the medicine bin can be replaced conveniently.

Preferably, the top end of the ratchet bar is vertically provided with a transverse block which is used for uniformly abutting against the pressing part; the medicine bin is provided with an opening, and a piston serving as a pressing part is arranged in the opening. Meanwhile, the ratchet bars are matched with the transverse blocks, so that the internal structure is conveniently and compactly arranged.

The vertical strip part is long and narrow and is arranged parallel to the axis of the pen body, and the vertical strip part is provided with continuous sawtooth-shaped protrusions to match with the ratchets; the cross block is matched with the piston at the top end of the vertical bar part. The cartridge may be generally tubular with a piston disposed in an opening at one end. The piston can pressurize the medicine in the medicine bin. The medicine bin and the pen body can be made of transparent materials and used for observing the residual amount of the liquid medicine.

Preferably, the inner wall of the pen body is provided with a guide rail extending along the length direction, and the smooth surface of the ratchet is slidably arranged in the guide rail.

The tooth surface of the ratchet bar faces the ratchet, the other surface of the ratchet bar is a smooth surface, and a structure matched with the guide rail can be arranged on the smooth surface. The matching structure of the guide rail and the smooth surface of the ratchet can be in the form of an I-shaped sliding groove matched with a sliding block, an I-shaped rail matched with an I-shaped groove and the like.

Preferably, establish at least three sand grips that extend along length direction on the body inner wall of the pen, press the pole surface by the spacing axial motion of body of the pen of edge of sand grip top surface.

The top ends of the convex strips play a role in limiting the degree of freedom of the pressing rod, generally, the three convex strips can be parallel when being arranged, and the connecting lines of the three convex strips on the same circumferential position of the pen body form an acute triangle so as to ensure that the pressing rod is positioned near the centroid.

Preferably, the bottom end of the pressing rod is provided with a spring concave bin for positioning the head of the compression spring.

The spring concave bin bottom can fix the compression spring and accommodate the head of the compression spring, and the compression spring concave bin bottom can be generally designed into a cylindrical shape.

Preferably, the bottom of the non-return ratchet is connected to the pressing lever by a resilient block.

The elastic block can be designed integrally with the pressing rod, and one surface of the elastic block is provided with ratchets matched with the ratchets. The ratchet resetting device can be in a form of a spring plate, one end of the spring plate is fixed on the surface of the pressing rod, a gap is reserved around the other end of the spring plate, and the gap can be compressed in the resetting process of the ratchet, so that the ratchet is released.

Preferably, a clamping groove is fixedly arranged outside the pen body and used for accommodating at least one medicine bin or needle.

The clamping groove can be a cavity matched with the shape of the medicine bin, and can also be in a form that an independent exposed groove is matched with a clamping block outside the medicine bin.

Preferably, a vertical rod is arranged on one side of the protrusion facing the medicine bin, and a clamping block for supporting the ratchet strip to prevent the ratchet strip from returning is further arranged at the top end of the vertical rod.

The clamping block pointed by the position points to the teeth of the ratchet bar and is propped against the teeth through the elasticity of the upright rod, so that the force threshold required by the movement of the ratchet bar is improved.

When the pressing rod moves downwards, the non-return ratchet and the bulge are close to each other to drive the ratchet strip to move downwards; when the pressing rod moves upwards, the distance between the ratchet and the protrusion returns to a far position, and the ratchet bar is left in place and does not return along with the ratchet due to the matching sliding of the ratchet bar. The stroke of the pressing rod moving downwards once, namely the stroke of driving the ratchets to move downwards, namely the stroke of pressing the compression volume of the injection medicine bin once is constant. The pressing rod is pressed to make the ratch move linearly in one direction for several times, so that the medicine liquid in the medicine bin is injected for several times. The compression amount of the medicine cabin is basically constant every time, and the injection dose can be conveniently controlled through the pressing times.

Through the baffle design, can conveniently, fix compression spring tail end steadily to promote the stability of single compression resilience. The separated lower cavities are convenient for mounting the medicine bin, and the problem that the medicine bin is not mounted in place is avoided.

Through the cooperation of the transverse block and the piston, the compression amount of the volume of the medicine bin in each time can be stabilized as much as possible.

The guide rail is arranged, so that the ratchet can stably move linearly along the pen body, and the swinging of the ratchet in the movement process is avoided.

The design of the convex strip can limit the freedom degree of the pressing rod and reduce the contact area of the surface of the pressing rod, thereby reducing the running friction force of the pressing rod.

Through the design of the spring concave bin, the direction of the compression spring force can be guided, and the deformation and the force application deflection caused by the deflection of the spring are avoided.

Through the arrangement of the elastic blocks (such as the elastic sheet plate), the matching performance of the ratchet strips can be improved on the premise of ensuring the service life. On the other hand, when the pressing rod is empty, the hollow space can be fully utilized.

The design of the preset spare medicine bin is adopted, and different medicine types can be selected for replacement according to the condition of the wounded.

Through the setting of fixture block, at the spring recovery in-process, the ratchet of ratchet strip breaks away from, and the fixture block continues to block the ratchet strip, has avoided the injection error that the ratchet strip drunkenness leads to.

The invention has the advantages that the preset medicine is provided with the storage type medicine bin, the liquid medicine does not need to be sucked, the needle head and the medicine are exposed to the external environment, the pollution is reduced, and the safety and the convenience in use are improved. Secondly, the analgesic can be injected for a plurality of times by pressing, and the injection dosage can be effectively controlled for a single wounded person. For the group wounded, the injector can be repeatedly used, and can be used for other wounded after the needle head is replaced, so that the injection efficiency is improved, and the analgesia management for treating the group wounded due to war injury is facilitated. Thirdly, the needle head is designed in a protective way, so that the needle stick injury caused in a battlefield chaotic environment can be avoided.

Drawings

FIG. 1 is a cross-sectional view of a controlled dose rapid battlefield analgesic injection device of the present invention;

FIG. 2 is an exploded view of the pen body of the controlled dose battlefield analgesia rapid injection device of the present invention;

FIG. 3 is an exploded view of the dose controlled rapid battlefield analgesic injection device of the present invention except the pen body;

FIG. 4 is a schematic view of the engagement of the pressing rod with the ratchet in the dose-controlled rapid injection device for analgesia in battlefield according to the present invention;

FIG. 5 is a cross-sectional view of the pen body of the dose controlled rapid battlefield analgesic injection device of the present invention;

FIG. 6 is a schematic view of the controllable dose rapid analgesic injection apparatus of the present invention;

FIG. 7 is a schematic view of another embodiment of a card slot associated with the controlled dose rapid analgesic injection device of the present invention;

FIG. 8 is a schematic partial cross-sectional view of another embodiment of a controlled-dose rapid battlefield analgesic injection device of the present invention with a cartridge;

wherein:

1-pen body 11-guide rail 12-convex strip

2-compression spring 3-pressing rod 4-needle

5-projection 51-through hole 52-vertical rod

53-block 6-medicine bin 61-piston

7-ratchet bar 71-transverse block 8-non-return ratchet

81-spring block 9-clamping groove

Detailed Description

The invention is further described below with reference to the following figures and specific examples.

The dose-controllable battlefield analgesia rapid injection device shown in figures 1 to 7 comprises a hollow pen body 1 and a compression spring 2 arranged in the pen body, wherein one end of the pen body 1 penetrates out of a pressing rod 3, the other end of the pen body is provided with a needle head 4, and a needle head cap is sleeved outside the needle head; the pressing rod 3 abuts against the head end of a compression spring 2 in the pen body 1, and the tail end of the compression spring 2 abuts against a protrusion 5 on the inner wall of the pen body 1; one end of a tubular medicine bin 6 is communicated with the needle 4 in the pen body 1, and a pressing part for extruding the content in the medicine bin is arranged at the other end of the medicine bin 6; a ratchet 7 is further arranged between the pressing rod 3 and the inner wall of the pen body 1, the top end of the ratchet 7 abuts against the pressing part of the medicine bin 6, and a non-return ratchet 8 used for pushing the ratchet 7 towards the medicine bin 6 is arranged beside the pressing rod 3. The section of the ratchet 7 is arc-shaped.

The protrusion 5 is in the shape of a transverse partition plate in the pen body, and the partition plate is provided with a through hole 51 for passing through the ratchet. The pen body 1 is internally divided into an upper cavity for accommodating the spring and a lower cavity for accommodating the medicine bin by the bulge 5. The ratchet 7 can pass through the through hole 54 without hindrance. The other end of the pen body 1, namely the tail end of the lower cavity, is arranged in a lower end cover form with a needle head 4. The top end of the ratchet 6 is vertically provided with a transverse block 71 which is used for uniformly abutting against the pressing part; the medicine bin 6 is provided with an opening, and a piston 61 serving as the pressing part 6 is arranged in the opening.

An I-shaped guide rail 11 extending along the length direction is arranged on the inner wall of the pen body 1, and an I-shaped groove on the smooth surface of the ratchet 7 is slidably arranged in the guide rail 11. Establish along three at least sand grips 12 of length direction extension on the 1 inner wall of body of a writing brush, press 3 surfaces of pole by the spacing axial motion of 1 axial of body of a writing brush of following of 12 top surfaces of sand grip. The bottom end of the pressing rod 3 is provided with a cylindrical spring concave bin for positioning the head of the compression spring 2. The bottom of the non-return ratchet 8 is connected to the pressing rod 3 by a spring plate type elastic block 81, one end of the spring plate is fixed on the surface of the pressing rod 3, and a gap is reserved around the other end.

According to another embodiment of the dose-controllable battlefield analgesia rapid injection device matching with the clamping block shown in fig. 7 to 8, on the basis of the above, the pen body 1 is externally fixed with a clamping groove 9 for clamping the standby medicine bin and the needle. The clamping groove 9 is a cavity matched with the standby medicine bin 6 in shape. An upright rod 52 is arranged on one side of the bulge 5 facing the medicine bin, and a clamping block 53 for supporting the ratchet 7 to prevent the ratchet from returning is further arranged at the top end of the upright rod 52.

The above-described second embodiment structure in detail from another point of view can be expressed as:

a dose-controllable rapid injection device for battlefield analgesia comprises a pen body 1, a pressing rod 3, a ratchet 7, a compression spring 2, a medicine bin 6 and a needle head 4; the pressing rod 3, the ratchet 7, the compression spring 2 and the medicine bin 6 are arranged in the pen body 1, and the needle 4 is connected with the medicine bin 6; when the pressing rod 3 is pressed, the pressing rod 3 drives the ratchet 7 to move downwards and simultaneously compresses the compression spring 2, and when the external force is removed, the compression spring 2 drives the ratchet 7 to move upwards to reset the ratchet 7.

The pen body 1 comprises an upper end cover, a lower end cover and a pen body; the upper end cover is arranged at the upper end of the pen body, and the lower end cover is arranged at the lower end of the pen body. The pen body is divided into an upper cavity and a lower cavity, a partition plate type bulge 5 is arranged between the upper cavity and the lower cavity, and a through hole 51 is formed in the partition plate; the upper cavity is provided with a ratchet 7, a pressing rod 3 and a compression spring 2, and the lower cavity is provided with a medicine bin 6. One end of the compression spring 2 is pressed against the ratchet 7, and the other end is pressed against the partition plate. The upper cavity is also provided with a convex strip 12 to reduce the contact area of the ratchet strip 7 and the pen body, thereby reducing the friction force between the two. The pen body is provided with a clamping groove 9 for accommodating a plurality of preset medicine bins (which can be the same medicine or different medicines) and the needle 4. After the injection pen is used for the first time, if the liquid medicine is remained, the needle head 4 can be replaced for reuse. For example, for the case of morphine-contraindicated victims, pre-placed ketamine injections can be used.

The ratchet 7 comprises a vertical part and a transverse block 71, the vertical part is long and narrow and is arranged in parallel with the pen body, and continuous saw-tooth-shaped protrusions are arranged on the vertical part; the cross piece 71 is at the lower end of the vertical portion for pushing the piston 61 in the cartridge 6. The pressing rod 3 comprises a pressing cap, a connecting rod and a spring concave bin, one end of the connecting rod is connected with the pressing cap, the other end of the connecting rod is provided with the spring concave bin, an elastic piece 81 in an elastic piece form is arranged on the spring concave bin, and the tail end of the elastic piece is provided with a sawtooth-shaped stop block type non-return ratchet 8. The spring concave chamber is used for installing a compression spring 2. A block 53 for supporting the ratchet 7 to prevent the ratchet from returning is arranged below the protrusion 5.

The medicine bin 6 is a round tubular structure, one end of the medicine bin is connected with the needle head 4, and the other end of the medicine bin is opened, so that the medicine bin is beneficial to the entering of the ratchet 7. The medicine bin 6 is filled with medicine liquid, a piston 61 is arranged in the medicine bin, and the ratchet 7 pushes the piston 61 so as to inject the medicine liquid from the needle 4.

The pressing rod 3 and the ratchet 7 are arranged in the pen body in parallel, and the sawtooth-shaped protrusions on the ratchet 7 are matched with the check ratchets 8 on the pressing rod 6. When the pressing rod 3 moves downwards, the non-return ratchet 8 interacts with the ratchet 7 to drive the ratchet 7 to move downwards; when the pressing rod 3 moves upwards, the non-return ratchet 8 slides with the ratchet 7 due to the elastic sheet, and cannot make the ratchet 7 move together. The pressing rod 3 moves downwards once, namely, the pressing rod drives the ratchet 7 to move downwards once, namely, the pressing rod presses the piston 61 in the medicine injection bin 6 once. The pressing rod 3 is pressed to move the ratchet 7 for a plurality of times, so that the liquid medicine in the medicine bin 6 can be injected for a plurality of times. If the amount of the medicine injected each time is constant, the medicine can be used as the minimum dosage unit of the injection pen, so that the injection dosage can be conveniently controlled through the pressing times.

The main advantages of the battlefield injection pen are as follows:

1. the injection amount can be conveniently controlled by pressing once as a minimum injection unit, and when the injection unit is used in a battlefield environment, a soldier can simply and conveniently control the injection amount;

2. the injection dose is limited when the injection is pressed once, and the injection speed can be controlled when the injection is pressed for multiple times, so that the over-high injection speed is prevented;

3. the residual liquid medicine after one-time use can be reused at intervals (because the action time of the analgesic is limited, the analgesic time can be prolonged by multiple injections);

4. the preset medicine and needle design is adopted, different medicine types can be selected according to the condition of the wounded, and the needle can be replaced for multiple use.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of numerous equivalents and substitutions, all of which are within the scope of the invention as defined by the appended claims.

Claims

1. A dose-controllable rapid injection device for battlefield analgesia comprises a hollow pen body and a compression spring arranged in the pen body, wherein one end of the pen body penetrates out of a pressing rod, and the other end of the pen body is provided with a needle head; the needle head is communicated with one end of a medicine bin in the pen body, and the other end of the medicine bin is provided with a pressing part for extruding the content in the medicine bin; a ratchet strip is further arranged between the pressing rod and the inner wall of the pen body, the top end of the ratchet strip is abutted against the pressing part of the medicine bin, and a non-return ratchet for pushing the ratchet strip towards the medicine bin is arranged beside the pressing rod.

2. The dose controlled rapid battlefield analgesic injection device as set forth in claim 1, wherein the protrusion is in the form of a cross partition in the pen body, and the partition is provided with a through hole for passing the ratchet.

3. The dose controlled rapid battlefield analgesic injection device as set forth in claim 1, wherein the top end of the ratchet bar is vertically provided with a cross block for evenly abutting against the pressing part; the medicine bin is provided with an opening, and a piston serving as a pressing part is arranged in the opening.

4. The device as claimed in claim 1, wherein the inner wall of the pen body is provided with a guide rail extending along the length direction, and the ratchet is smoothly and slidably disposed in the guide rail.

5. The device as claimed in claim 1, wherein the inner wall of the pen body is provided with at least three ribs extending in the longitudinal direction, and the surface of the pressing rod is limited by the top surfaces of the ribs to move axially along the pen body.

6. The controllable-dose rapid battlefield analgesic injection device as set forth in claim 1, wherein the bottom end of the pressing rod is opened with a spring pocket for positioning the head of the compression spring.

7. The dose controlled battlefield analgesic rapid injection device as claimed in claim 1, wherein the non-return ratchet bottom is connected to the pressing rod by a spring block.

8. The dose controlled rapid battlefield analgesic injection device as set forth in claim 1, wherein a slot is fixedly disposed outside the pen body, and the slot is used for accommodating at least one drug bin or needle.

9. The device as claimed in claim 1, wherein the protrusion has a vertical rod on its side facing the cartridge, and a block is provided on the top of the vertical rod for supporting the ratchet to prevent the ratchet from moving back.