CN220877430U

CN220877430U - Automatic medicine pushing device suitable for injector

Info

Publication number: CN220877430U
Application number: CN202321871660.8U
Authority: CN
Inventors: 刘青
Original assignee: Third Hospital of Hebei Medical University
Current assignee: Third Hospital of Hebei Medical University
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2024-05-03
Anticipated expiration: 2033-07-17

Abstract

The application provides an automatic medicine pushing device suitable for an injector, which comprises a base, a fixed block, a push plate and a linear driving assembly, wherein the fixed block is arranged on the base; the base is connected with a locking component, and the base can be stably arranged on a tabletop or a bed surface at the side of a patient through the locking component; the fixed block is provided with a positioning groove and a positioning frame, and the needle cylinder of the injector can be fixed through the positioning groove and the positioning frame; the push plate is connected to the upper surface of the base in a sliding way and is used for moving towards the fixed block and abutting against the rear end of the piston core rod, so that the piston core rod moves forwards relative to the needle cylinder, and the liquid medicine in the needle cylinder is further output outwards; the linear driving assembly is arranged on the base, is in transmission connection with the push plate and is used for driving the push plate to move back and forth. The automatic medicine pushing device suitable for the injector can replace manual operation by automatic medicine pushing, reduces the energy consumed by medical staff, ensures stable injection efficiency, and further improves the stability of clinical treatment effect generated by the injection mode.

Description

Automatic medicine pushing device suitable for injector

Technical Field

The application belongs to the technical field of medical tools, and particularly relates to an automatic medicine pushing device suitable for an injector.

Background

The injector is a common medical appliance and is mainly used for injecting liquid medicine into a patient; syringe structures common in the art include: a needle cylinder with a small hole at the front end and a piston core rod matched with the needle cylinder; the rear end of the needle cylinder is provided with a pressing sheet extending outwards along the radial direction of the needle cylinder, and fingers of medical staff clamp or hook the pressing sheet, so that the slipping phenomenon of the needle cylinder moving along the axial direction of the needle cylinder can be effectively avoided.

During the clinical use phase, the injector needs to face different transfusion requirements. When injecting a part of chemotherapy drugs, the injection time needs to be prolonged, and the following modes are adopted in the prior art: the front end of the needle cylinder is connected with a hose with a needle, medical staff punctures the skin and blood vessels of a patient by the needle, and the liquid medicine is input into the patient; because of the flexible tubing having a certain deformability, the patient can make a small range of movements during the injection.

The inventor finds that the existing injection mode needs medical staff to keep the injection posture for a long time, and simultaneously pushes the piston core rod slowly, so that the process not only occupies the time of the medical staff, but also consumes a great deal of energy, and the injection mode has the technical problem of unstable injection efficiency and causes unstable clinical treatment effect.

Disclosure of utility model

The embodiment of the application provides an automatic medicine pushing device suitable for an injector, which aims to replace manual operation with automatic medicine pushing, reduce the energy consumed by medical staff, ensure stable injection efficiency and further improve the stability of clinical treatment effect generated by the injection mode.

In order to achieve the above purpose, the application adopts the following technical scheme:

There is provided an automated drug delivery device for use with a syringe, comprising:

The base is used for being fixedly placed on a horizontal plane, and a locking component used for clamping the plate body is connected to the base;

The fixed block is fixedly connected to the upper surface of the base, and is provided with a positioning groove penetrating in the front-back direction and penetrating through the upper surface of the fixed block from bottom to top; one side of the fixed block facing the front-back direction is provided with an alignment frame, and when the injector is inserted into the positioning groove from top to bottom and the axial direction of the injector is parallel to the front-back direction, the pressing sheet of the needle cylinder is suitable for being inserted into the alignment frame so as to limit the axial movement of the needle cylinder along the needle cylinder;

The pushing plate is connected to the upper surface of the base in a sliding way along the front-back direction, is arranged in parallel with the fixed block along the front-back direction and is used for moving towards the fixed block and abutting against the rear end of the piston core rod so as to enable the piston core rod to move forwards relative to the needle cylinder; and

The linear driving assembly is arranged on the base, is in transmission connection with the push plate and is used for driving the push plate to move along the front-back direction.

In one possible implementation, the base includes:

the shell is provided with a shell cavity with an upward opening; and

The top cover is detachably connected to the shell and is suitable for closing the opening of the shell cavity;

wherein, the fixed block and the push plate are both connected to the top cover; the top cover is provided with a guide hole which penetrates in the up-down direction and extends in the front-back direction; the lower end of the push plate is provided with a sliding block which is suitable for being in sliding connection with the guide hole; the linear driving assembly is arranged in the shell cavity and is in transmission connection with the sliding block.

In one possible implementation, the linear drive assembly includes:

The transmission screw is arranged in the shell cavity, the axial direction of the transmission screw is parallel to the front-back direction, and the front end and the back end of the transmission screw are rotationally connected with the lower surface of the top cover along the front-back direction;

The transmission nut is connected with the sliding block and is in threaded connection with the transmission screw; and

The power output shaft of the rotating motor is suitable for being parallel to the front-back direction, and the power output end of the rotating motor is connected with the transmission screw rod through a speed regulating mechanism;

when the rotating motor is started, the speed regulating mechanism drives the transmission screw to rotate, so that the transmission nut and the sliding block are driven to move along the front-back direction.

In one possible implementation manner, the rotating motor is detachably connected with the top cover, and the speed regulating mechanism comprises:

The driving gear is coaxially connected with the power output end of the rotating motor; and

The driven gear is coaxially and fixedly connected to the transmission screw and meshed with the driving gear.

In one possible implementation, the top cover further includes:

The mounting seat is fixedly connected to the lower surface of the top cover, and the lower surface of the mounting seat is suitable for being connected with the rotating motor; and

And the limiting frame is detachably connected to the mounting seat and is suitable for supporting and limiting the rotating motor.

In one possible implementation, the automated drug delivery device adapted for use with a syringe further comprises:

and the distance sensor is arranged between the base and the push plate and is used for monitoring the front-back distance between the push plate and the rear end of the base.

In one possible implementation, the distance sensor is an infrared sensor; the signal generating module of the infrared sensor is fixedly connected to the rear end of the base, and the signal receiving module of the infrared sensor is fixedly connected to the rear side face of the push plate.

The controller is arranged on the base and is electrically connected with the signal output module of the distance sensor and the control module of the linear driving assembly;

wherein the controller can preset a distance value; when the signal output module output by the distance sensor corresponds to a preset distance value, the controller can control the linear driving assembly so as to change the moving speed of the push plate.

In one possible implementation, the locking member includes:

The clamping plate is arranged below the base, one end of the clamping plate is hinged with the lower surface of the base, and the hinge axis is parallel to the left-right direction; and

The torsion spring is arranged between the clamping plate and the base, and two ends of the torsion spring are respectively connected with the clamping plate and the base;

The clamping plate is suitable for swinging to an idle state parallel to the lower surface of the base and is also suitable for swinging to an open state with an included angle with the lower surface of the base; when the clamping plate is in the open state, the clamping plate is suitable for being matched with the lower surface of the base to be clamped on the plate body, and the torsion spring is in an elastic deformation state.

In one possible implementation, the base further includes:

the rubber pad is fixedly connected to the upper surface of the base, is arranged in parallel with the fixed block along the front-rear direction, and is positioned on one side of the fixed block, which is opposite to the push plate;

When the injector is inserted into the positioning groove from top to bottom and the pressing piece of the syringe is inserted into the alignment frame, the rubber pad is suitable for supporting the syringe.

In the embodiment of the application, the base can be fixed on the table board or the bed board on one side of a patient through the clamping relation between the locking component and the board body, so that the device is fixed; simultaneously, the injector is placed on the fixed block from top to bottom, so that the needle cylinder is inserted into the positioning groove, and the pressing sheet of the needle cylinder is embedded into the alignment frame, thereby realizing the fixation of the needle cylinder. After the preparation operation is finished, the push plate can be driven to move along the front-back direction through the linear driving assembly, and then the piston core rod can move relative to the needle cylinder in a pushing mode, so that the process of liquid medicine injection is finished.

Compared with the prior art, the automatic medicine pushing device suitable for the injector can replace manual operation with automatic medicine pushing, reduces the energy consumed by medical staff, ensures stable injection efficiency, and further improves the stability of clinical treatment effect generated by the injection mode.

Drawings

Fig. 1 is a schematic perspective view of an automatic medicine pushing device for a syringe according to an embodiment of the present application;

FIG. 2 is a side view of an automated drug delivery device for a syringe according to an embodiment of the present application;

FIG. 3 is a schematic diagram showing a second perspective view of an automatic drug delivery device for a syringe according to an embodiment of the present application;

FIG. 4 is an exploded view of an automated drug delivery device for a syringe according to an embodiment of the present application;

FIG. 5 is a schematic perspective view of a top cover and related components used in an embodiment of the present application;

FIG. 6 is a schematic explosion diagram between a push plate and a drive nut employed in an embodiment of the present application;

FIG. 7 is a schematic view of a partial explosion between a top cover and a rotary motor employed in an embodiment of the present application;

FIG. 8 is an enlarged schematic view of a portion of a linear drive assembly used in an embodiment of the present application;

FIG. 9 is a schematic view of a partial explosion between a top cover and a locking member employed in an embodiment of the present application;

FIG. 10 is a schematic diagram of electrical connection of a controller according to an embodiment of the present application;

Reference numerals illustrate: 1. a base; 11. a housing; 111. a shell cavity; 12. a top cover; 121. a guide hole; 122. a mounting base; 123. a limit frame; 2. a locking member; 21. a clamping plate; 22. a torsion spring; 3. a fixed block; 31. a positioning groove; 32. an alignment frame; 4. a push plate; 41. a slide block; 5. a linear drive assembly; 51. a drive screw; 52. a drive nut; 53. a rotating motor; 6. a speed regulating mechanism; 61. a drive gear; 62. a driven gear; 7. a distance sensor; 8. a controller; 9. and a rubber pad.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

Referring to fig. 1 to 10 together, an automated drug delivery device for a syringe according to the present application will now be described. The application provides an automatic medicine pushing device suitable for an injector, which comprises a base 1, a fixed block 3, a push plate 4 and a linear driving assembly 5.

The base 1 is intended to be placed fixedly on a horizontal surface, typically on a bed surface on which a patient is lying in actual use, or on a table on the side of the patient. In this embodiment, the base 1 is connected with the locking member 2, and the locking member 2 can be clamped on a table board or a bed board, so as to limit the movement of the base 1 relative to a horizontal plane, and improve the stability of the base 1 in actual placement.

The fixed block 3 is fixedly connected to the upper surface of the base 1, and is provided with a positioning groove 31 penetrating in the front-rear direction and penetrating through the upper surface of the fixed block 3 from bottom to top; the fixing block 3 has an alignment frame 32 on one side in the front-rear direction, and when the injector is inserted into the positioning groove 31 from top to bottom and the axial direction of the injector is parallel to the front-rear direction, the pressing piece of the syringe is suitable for being inserted into the alignment frame 32 to limit the axial movement of the syringe.

The push plate 4 is slidably connected to the upper surface of the base 1 along the front-rear direction, and is arranged in parallel with the fixed block 3 along the front-rear direction, and is used for moving towards the fixed block 3 and abutting against the rear end of the piston core rod so as to enable the piston core rod to move forward relative to the needle cylinder.

The linear driving assembly 5 is arranged on the base 1, is in transmission connection with the push plate 4 and is used for driving the push plate 4 to move along the front-back direction.

In the embodiment of the application, the base 1 can be fixed on a table plate or a bed plate on one side of a patient through the clamping relationship between the locking member 2 and the plate body, so that the device is fixed; simultaneously, the injector is placed on the fixed block 3 from top to bottom, so that the needle cylinder is inserted into the positioning groove 31, and the pressing sheet of the needle cylinder is embedded into the alignment frame 32, thereby realizing the fixation of the needle cylinder. After the preparation operation is finished, the push plate 4 can be driven to move along the front-back direction through the linear driving assembly 5, and then the piston core rod can move relative to the needle cylinder in a mode of pushing the push plate 4, so that the process of liquid medicine injection is finished.

In some embodiments, as shown in fig. 1, 3 and 4, the base 1 includes a housing 11 and a top cover 12.

The housing 11 has a convex cross-section and has a housing cavity 111 with an opening facing upward.

The top cover 12 is detachably connected to the housing 11, and adopts a structure adapted to the above-mentioned letter-shaped structure, and when the top cover 12 is connected to the housing 11, the top cover 12 is adapted to close the opening of the housing cavity 111.

The fixed block 3 and the push plate 4 are connected to the top cover 12; the top cover 12 has a guide hole 121 penetrating in the up-down direction and extending in the front-rear direction; the lower end of the push plate 4 is provided with a sliding block 41 which is suitable for being in sliding connection with the guide hole 121; by the combined structure of the slider 41 and the guide hole 121, the sliding connection relationship of the push plate 4 and the top cover 12 can be realized while restricting the sliding direction of the push plate 4 with respect to the top cover 12. The linear driving assembly 5 is disposed in the housing 111 and is in driving connection with the slider 41.

In some embodiments, as shown in fig. 5-9, the linear drive assembly 5 includes a drive screw 51, a drive nut 52, and a rotation motor 53.

The driving screw 51 is disposed in the housing 111, and has an axial direction parallel to the front-rear direction, and front and rear ends thereof are rotatably connected to the lower surface of the top cover 12 in the front-rear direction.

The drive nut 52 is connected to the slide 41 and is screwed to the drive screw 51.

It should be noted that, the connection between the slider 41 and the driving nut 52 is realized by forming a reserved groove at the upper end of the driving nut 52, and meanwhile, a related structure of a ball screw is adopted between the driving nut 52 and the driving screw 51, specifically, a ball is added between the driving nut 52 and the driving screw 51, so as to improve the stability of the driving relationship between the two.

The rotary motor 53 is provided on the lower surface of the top cover 12, and its power output shaft direction is adapted to be parallel to the front-rear direction, and its power output end is connected to the drive screw 51 through the speed regulating mechanism 6.

By adopting the technical scheme, when the rotary motor 53 is started, the speed regulating mechanism 6 drives the transmission screw 51 to rotate, so that the transmission nut 52 and the sliding block 41 are driven to move along the front-back direction; in this process, the rotation speed of the drive screw 51 and thus the movement speed of the push plate 4 can be adjusted by adjusting the rotation motor 53 or the speed adjusting mechanism 6.

In some embodiments, as shown in fig. 7 and 8, the rotary motor 53 is detachably connected to the top cover 12, and the speed regulating mechanism 6 includes a driving gear 61 and a driven gear 62.

The driving gear 61 is coaxially connected to the power output end of the rotation motor 53.

The driven gear 62 is coaxially and fixedly connected to the drive screw 51 and meshes with the driving gear 61.

By adopting the above-described technical scheme, the driving gear 61 can be rotated by starting the rotation motor 53, and the driven gear 62 can be rotated in synchronization with the drive screw 51 due to the meshing relationship between the driving gear 61 and the driven gear 62.

On the basis of the above, the rotation speed of the drive screw 51 is affected by the transmission ratio between the driving gear 61 and the driven gear 62, and the rotation speed of the drive screw 51 can be adjusted by removing the rotation motor 53 and replacing the driving gear 61.

In some embodiments, as shown in fig. 7, the top cover 12 further includes a mounting base 122 and a stop frame 123.

The mounting base 122 is fixedly connected to the lower surface of the top cover 12, and the lower surface thereof is adapted to be connected to the rotating motor 53.

The limiting frame 123 is detachably connected to the mounting base 122, and is adapted to support and limit the rotation motor 53.

In the present embodiment, as shown in fig. 7, the detachable connection relationship of the limit frame 123 and the mount 122 is realized by four bolts; specifically, the edge of the limiting frame 123 has a side wing plate extending upward to be suitable for contacting the outer side surface of the mounting seat 122, the side wing plate has a through hole suitable for the bolt to pass through, and the corresponding position of the mounting seat 122 has a thread groove suitable for being in threaded connection with the threaded portion of the bolt.

In some embodiments, as shown in fig. 1 and 2, an automated drug delivery device suitable for use with a syringe further comprises a distance sensor 7.

The distance sensor 7 is arranged between the base 1 and the push plate 4 and is used for monitoring the front-back distance between the push plate 4 and the rear end of the base 1, so that the sliding speed of the push plate 4 is effectively monitored, and the monitoring and recording of the injection efficiency of the injector are realized.

In some embodiments, as shown in fig. 1, the distance sensor 7 is an infrared sensor; wherein, infrared sensor's signal generation module fixed connection is on the rear end of base 1, and infrared sensor's signal receiving module fixed connection is on the trailing flank of push pedal 4.

In some embodiments, as shown in fig. 1 and 10, an automated drug delivery device suitable for use with a syringe further includes a controller 8.

The controller 8 is arranged on the base 1 and is electrically connected with a signal output module of the distance sensor 7 and a control module of the linear driving assembly 5.

Wherein the controller 8 is capable of presetting a distance value; when the signal output module output by the distance sensor 7 corresponds to a preset distance value, the controller 8 can control the linear driving assembly 5 to change the moving speed of the push plate 4, so as to achieve the following technical purposes:

When the first-stage liquid medicine is output, the speed is kept low, and at the moment, medical staff can observe the reaction of a patient so as to finish the conveying of the liquid medicine in time; then, when the second-stage liquid medicine is output, the speed is kept high, and the conveying efficiency of the liquid medicine is ensured; finally, when the third-stage liquid medicine is output, the speed returns to the lower speed again, and the stability of the needle head when the needle head is pulled out is ensured.

In some embodiments, as shown in fig. 1, 3 and 9, the locking member 2 includes a clamping plate 21 and a torsion spring 22.

The clamping plate 21 is arranged below the base 1, one end of the clamping plate is hinged with the lower surface of the base 1, and the hinge axis is parallel to the left-right direction.

The torsion spring 22 is arranged between the clamping plate 21 and the base 1, and two ends of the torsion spring are respectively connected with the clamping plate 21 and the base 1.

By adopting the above technical scheme, the clamping plate 21 is suitable for swinging to an idle state parallel to the lower surface of the base 1 and is also suitable for swinging to an open state with an included angle with the lower surface of the base 1; when the clamping plate 21 is in an open state, the clamping plate 21 is suitable for being matched with the lower surface of the base 1 to be clamped on the plate body, and the torsion spring 22 is in an elastic deformation state.

It should be noted that, the side of the clamping plate 21 facing the lower surface of the base 1 has anti-skidding patterns, which are suitable for increasing the friction force between the clamping plate 21 and the plate surface and improving the stability of the clamping plate body by the locking member 2.

In some embodiments, as shown in fig. 1, the base 1 further includes a rubber pad 9, where the rubber pad 9 is fixedly connected to the upper surface of the base 1, and is arranged in parallel with the fixing block 3 along the front-rear direction, and is located on a side of the fixing block 3 facing away from the push plate 4.

By adopting the above technical scheme, when the injector is inserted into the positioning groove 31 from top to bottom and the pressing piece of the syringe is inserted into the alignment frame 32, the rubber pad 9 is suitable for supporting the syringe, so as to prevent the syringe from swinging around the pressing piece.

The above description is merely illustrative of the preferred embodiments of the present application and should not be taken as limiting the application, but all modifications, equivalents, improvements and changes within the spirit and principles of the application are intended to be included within the scope of the present application.

Claims

1. Automatic change medicine device that pushes away suitable for syringe, its characterized in that includes:

2. The automated drug delivery device for a syringe of claim 1, wherein the base comprises:

the shell is provided with a shell cavity with an upward opening; and

3. The automated drug delivery device adapted for use with a syringe of claim 2, wherein the linear drive assembly comprises:

4. An automated drug delivery device for a syringe as in claim 3 wherein the rotary motor is removably coupled to the cap and the speed regulating mechanism comprises:

5. An automated drug delivery device for a syringe as defined in claim 3 or 4, wherein the cap further comprises:

6. The automated drug delivery device for a syringe of claim 1, further comprising:

7. The automated drug delivery device for a syringe of claim 6, wherein the distance sensor is an infrared sensor; the signal generating module of the infrared sensor is fixedly connected to the rear end of the base, and the signal receiving module of the infrared sensor is fixedly connected to the rear side face of the push plate.

8. An automated drug delivery device for a syringe as in claim 6 or 7, further comprising:

9. The automated drug delivery device adapted for use with a syringe of claim 1, wherein the locking member comprises:

10. The automated drug delivery device for a syringe of claim 1, wherein the base further comprises: