CN220327746U - Medicine injection equipment - Google Patents

Abstract

The embodiment of the utility model relates to a drug injection device, which mainly comprises the following structures: the swinging module comprises two first guide rails, two swinging arms, a connecting arm and a base; the two pushing modules are respectively sleeved on the two first guide rails; the rotating module comprises a ratchet wheel and an outer screw; the unidirectional stop module is connected with the ratchet wheel and used for controlling the ratchet wheel to rotate unidirectionally; the limiting module is used for limiting the swing arm; the inner screw is arranged in the outer screw and is in threaded connection with the inner thread of the outer screw; the piston is fixedly connected with the top end of the inner screw rod; and the medicine tank is used for loading medicine liquid and sleeved on the piston. The utility model adopts a double swing arm and double screw structure, has strong stability, compact structure, small volume and convenient carrying; the accurate injection of the dosing amount can be realized through the ratchet wheel setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.

Description

Medicine injection equipment

Technical Field

The utility model relates to the field of medicines, in particular to a medicine injection device.

Background

The patch type drug delivery device is a medical instrument device for realizing the treatment of the disease of a patient by continuously injecting drugs into the patient. The device is widely used for treating diabetes mellitus, the application type insulin pump system is equipment for infusion of insulin by diabetics, and compared with a traditional insulin pump, the application type insulin pump has no pipeline, can be worn on the body, and can continuously deliver basic insulin and large-dose insulin within two to three days.

The existing pasting type drug delivery device is large in size, inconvenient to carry, incapable of accurately controlling the injection metering of the liquid medicine by a user, single in injection dosage and extremely confusing for the user.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the medicine injection equipment which adopts a double-swing arm and double-screw structure, has strong stability, compact structure and small volume and is convenient to carry; the accurate injection of the dosing amount can be realized through the ratchet wheel setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.

In view of this, an embodiment of the present utility model provides a drug injection device including:

the swinging module comprises two first guide rails, two swinging arms, a connecting arm and a base; the first guide rails are arranged on the inner sides of the swing arms, the top ends of the two first guide rails and the two swing arms are fixed on the connecting arms, and the bottom ends of the two first guide rails and the two swing arms are fixed on the base; a through hole is formed in the middle of the connecting arm;

the two pushing modules are respectively sleeved on the two first guide rails and can axially move along the first guide rails;

the rotating module comprises a ratchet wheel and an outer screw; wherein the ratchet is driven by the pushing module; the outer screw is vertical and fixed on the ratchet wheel, the outer screw is provided with an external thread and an internal thread, and the external thread is in threaded connection with the through hole of the connecting arm;

the unidirectional stop module is connected with the ratchet wheel and used for controlling the ratchet wheel to rotate unidirectionally;

the limiting module is used for limiting the swing arm, and stopping rotating when the swing arm rotates to the limiting module;

the inner screw is arranged in the outer screw and is in threaded connection with the inner thread of the outer screw;

the piston is fixedly connected with the top end of the inner screw rod;

and the medicine tank is used for loading medicine liquid, is sleeved on the piston, and can press out the medicine liquid in the medicine tank when the piston moves upwards.

Preferably, the limiting module comprises a first limiting base and a second limiting base;

stopping rotating when the swing arm rotates to the first limit base;

and stopping rotating when the swing arm rotates to the second limit base.

Preferably, the device further comprises two driving wires respectively connected with the two swing arms for driving the swing arms to rotate.

Preferably, the device further comprises a first support, and the base is fixed on the first support through a rotating shaft.

Further preferably, the apparatus further comprises a back plate and a second support;

the backboard is fixedly connected with the side face of the first support;

the second support is fixed between the connecting arm and the backboard.

Further preferably, the one-way stop module includes a second rail and a stop tab;

the top end of the second guide rail is fixed on the second support, and the bottom end of the second guide rail is fixed on the first support;

the stop piece is sleeved on the second guide rail and connected with the ratchet wheel to control the ratchet wheel to rotate unidirectionally.

Preferably, the operation of the drug infusion device comprises:

the first stage, the swing arm rotates along the first direction under the action of the first driving force until the swing arm stops when rotating to the limit module, in the process, the swing arm drives the pushing module to rotate along with the rotation, the pushing module drives the ratchet wheel and the outer screw rod to rotate along the first direction, and the base is fixed, so that the swing arm and the outer screw rod cannot axially move, and the inner screw rod axially and upwards rotates out of the outer screw rod, so that the piston is pushed to upwards move to press out the liquid medicine in the medicine tank;

the second stage, the swing arm rotates along the second direction under the action of the second driving force until the swing arm rotates to the limit module, in the process, the swing arm drives the pushing module to rotate beyond the ratchet wheel under the action of the unidirectional stop module, and the outer screw rod and the inner screw rod cannot rotate, so that the outer screw rod is rotated out of the connecting arm in the axial direction upwards to drive the ratchet wheel and the inner screw rod to move in the axial direction upwards, and the piston is pushed to move upwards to press out the liquid medicine in the medicine tank;

and cycling the first stage and the second stage until the piston reaches the top end of the medicine tank to stop working.

Further preferably, the first direction is clockwise or counterclockwise, and the second direction is opposite to the first direction.

Further preferably, the rotation angles of the swing arm in the first stage and the second stage are the same.

The medicine injection device provided by the embodiment of the utility model adopts a double-swing arm and double-screw structure, has strong stability, compact structure and small volume, and is convenient to carry; the accurate injection of the dosing amount can be realized through the ratchet wheel setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.

Drawings

Fig. 1 is a schematic structural diagram of a drug infusion device according to an embodiment of the present utility model;

fig. 2 is a schematic view of a part of a drug injection device according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a part of a drug infusion device according to an embodiment of the present utility model;

fig. 4 is a top view of a medication injection device according to an embodiment of the present utility model during a first stage of operation;

fig. 5 is a front view of a medication injection device according to an embodiment of the present utility model during a first stage of operation;

FIG. 6 is a top view of a drug infusion device in a second stage of operation provided in accordance with an embodiment of the present utility model;

fig. 7 is a front view of a medication injection device according to an embodiment of the present utility model during a second stage of operation.

Detailed Description

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Fig. 1 is a schematic structural view of a drug injection device according to an embodiment of the present utility model, fig. 2 is an exploded schematic view of a drug injection device according to an embodiment of the present utility model, fig. 3 is a schematic structural view of a part of a drug injection device according to an embodiment of the present utility model, and, with reference to fig. 1 to 3, a drug injection device according to an embodiment of the present utility model includes a swing module 11, two pushing modules 12, a rotation module 13, a unidirectional stop module 14, a limit module 15, an internal screw 16, a piston 17, and a drug tank 18, and the structure of each part of the device is specifically described below.

The swing module 11 is used for receiving external driving force to generate swing so as to drive the pushing module 12. The swing module 11 may specifically include two first guide rails 111, two swing arms 112, a connection arm 113, and a base 114; the first guide rails 111 are disposed at the inner sides of the swing arms 112, the top ends of the two first guide rails 111 and the two swing arms 112 are fixed on the connecting arm 113, the bottom ends are fixed on the base 114, it is understood that the connecting arm 113 and the base 114 are used for connecting the two swing arms 112 and fixing the two first guide rails 111, further, a through hole is formed in the middle of the connecting arm 113, and threads are arranged in the through hole; the two swing arms 112 are symmetrical in structure, so that input is more stable, and meanwhile, a supporting effect is achieved.

It should be noted that, the source of the external driving force may be applied by a user or may be generated by a power module, where the power module includes, but is not limited to, a driving motor and driving wires, and in this embodiment, the power module includes two driving wires 19, which are respectively connected to two swing arms 112, and are used to generate the driving force to drive the swing arms 112 to rotate, and when the device is not in operation, the driving wires 19 are in a loose state, and when the device is in operation, the driving wires 19 are in a contracted state. In a preferred embodiment, the drive wires 19 may be drive wires, and when the device is in operation, the two drive wires are alternately energized, respectively, and the wires change from a relaxed state to a contracted state to generate a driving force, which drives the swing arm 112 to rotate.

Two pushing modules 12, which function to drive the rotation module 13 to rotate. The two pushing modules 12 are respectively sleeved on the two first guide rails 111, and can axially move along the first guide rails 111, and as the first guide rails 111 are arranged on the inner sides of the swing arms 112, the swing arms 112 form a pushing module limiting surface, so that the pushing modules 12 are limited when the swing arms 112 rotate; in this embodiment, the pusher module 12 includes, but is not limited to, a pusher tab.

It is understood that the number of the pushing modules 12 is the same as the number of the swing arms 112, and those skilled in the art can select and set the number of the pushing modules 12 and the number of the swing arms 112 according to the need.

The rotation module 13 specifically comprises a ratchet 131 and an outer screw 132; wherein the teeth of the ratchet wheel 131 are connected with the pushing piece, so that the ratchet wheel 131 is driven by the pushing module 12, it should be understood that when the swing arm 112 rotates in one direction, the pushing module 12 is driven to work, and the pushing module 12 drives the ratchet wheel 131 to rotate.

The outer screw 132 is vertically and fixedly arranged on the ratchet 131, and it is understood that the outer screw 132 is driven to rotate when the ratchet 131 rotates. In addition, an external thread is arranged on the outer side of the external screw 132 and is in threaded connection with the through hole of the connecting arm 113, so that the relative movement of the external screw 132 and the connecting arm 113 can be realized; further, a through hole is provided in the outer screw 132, and an internal thread is provided in the through hole for screwing with the inner screw 16, thereby enabling relative movement of the outer screw 132 and the inner screw 16.

A one-way stop module 14, coupled to the ratchet 131, is operative to control one-way rotation of the ratchet 131, where the one-way stop module includes, but is not limited to, a one-way stop tab.

The limiting module 15 is used for limiting the swing arm 112, and stopping rotating when the swing arm 112 rotates to the limiting module 15. In this embodiment, the limiting module 15 may be a limiting block with a thickness, and simultaneously realize limiting of the two swing arms 112, or two limiting units may respectively realize limiting of the two swing arms 112, in a specific example, the limiting module 15 may include a first limiting base 151 and a second limiting base 152, where the limiting base may generate a limiting surface, and the first limiting base 151 is used to limit the right swing arm 112, and stop rotating when the right swing arm 112 rotates to the limiting surface; the second limiting base 152 is used for limiting the left swing arm 112, and stops rotating when the left swing arm 112 rotates to a limiting surface.

The inner screw 16 is disposed in the outer screw 132 and is screwed with the inner thread of the outer screw 132, and can be screwed out of the outer screw 132 or screwed into the outer screw 132 downwards along the axial direction, so that the axial dimension of the device can be greatly reduced, the structure is more compact, and the space inside the device is released, thereby providing convenience for users.

The piston 17 is fixedly connected with the top end of the inner screw 16, and moves upwards or downwards along with the inner screw 16 in the axial direction, and it is understood that the piston 17 moves along with the inner screw and does not rotate due to the fact that the piston 17 is fixedly connected with the top end of the inner screw 16.

A medicine tank 18 for loading medicine liquid, which is sleeved on the piston 17, and the piston 17 moves upwards to press out the medicine liquid in the medicine tank 18, wherein the medicine liquid comprises, but is not limited to, insulin, glucagon, antibiotics, nutrient solution, analgesic, morphine, anticoagulant, gene therapy medicine, cardiovascular medicine or chemotherapy medicine, etc.

In a preferred embodiment, to achieve stability of the apparatus, the apparatus further comprises a first support 20, the base 114 being fixed to the first support 20 by a rotation shaft, the base 114 being rotatable on the first support 20 about the rotation shaft, which is preferably arranged in a central position of the base 114.

Further, in order to facilitate the carrying by the user and to improve the stability of the device, the device further comprises a back plate 21 and a second support 22, as shown in fig. 1 to 3; wherein the back plate 21 is fixedly connected with the side surface of the first support 20; the second support 22 is fixed between the connection arm 113 and the back plate 21, thereby fixing both the top and bottom of the apparatus to the back plate 21, achieving structural stability.

In a more preferred embodiment, the unidirectional stop module 14 may include, in particular, a second rail 141 and a stop tab 142; the top end of the second guide rail 141 is fixed on the second support 22, and the bottom end is fixed on the first support 20, so that the second guide rail 141 is fixed up and down, and the stability of the unidirectional stop module 14 during operation is realized; the stop piece 142 is sleeved on the second guide rail 141 and can move axially along the second guide rail 141, and the stop piece 142 is connected with teeth of the ratchet 131 to control the ratchet 131 to rotate unidirectionally.

On the basis of understanding the structure of the drug injection device provided by the embodiment of the present utility model, the working process of the device will be specifically described with reference to the above structure.

The working process of the drug injection device provided in this embodiment specifically includes two stages:

in the first stage, as shown in fig. 4 and 5, the swing arm 112 rotates in the first direction under the action of the first driving force until the swing arm 112 stops when rotating to the limit module 15, in this process, the swing arm 112 drives the pushing module 12 to rotate along with the rotation, the pushing module 12 drives the ratchet 131 and the outer screw 132 to rotate in the first direction, and since the base 114 is fixed, the swing arm 112 and the outer screw 132 cannot move axially, the inner screw 16 is rotated out of the outer screw 132 upwards in the axial direction, so that the piston 17 is pushed to move upwards to press out the liquid medicine in the medicine tank 18.

In the second stage, as shown in fig. 6 and 7, the swing arm 112 rotates in the second direction under the action of the second driving force until the swing arm 112 stops rotating to the limit module 15, in this process, since the ratchet 131 is fixed under the action of the unidirectional stop module 14, the swing arm 112 drives the pushing module 12 to rotate beyond the ratchet 131, and the outer screw 132 and the inner screw 16 cannot rotate, so that the outer screw 132 is screwed out of the connecting arm 113 in the axial direction, and drives the ratchet 131 and the inner screw 16 to move in the axial direction, thereby pushing the piston 17 to move upwards to press the liquid medicine in the medicine tank 18. At this time, the swing arm 112 completes a reciprocating motion.

The first and second phases are cycled until the piston 17 reaches the top of the canister 18 to stop operation.

The first direction may be opposite to the second direction, and may be clockwise or counterclockwise, and may be set by those skilled in the art as required.

Further, the rotation angles of the swing arm 112 in the first stage and the second stage are the same, that is, the first driving force and the second driving force are the same, and the first driving force and the second driving force are respectively used for distinguishing for the convenience of stage description.

It will be understood that the dosage of each time is determined by the upward displacement of the piston 17, where the upward displacement of the piston 17 is related to the rotation angle of the swing arm 112, the number of teeth of the ratchet wheel 131 and the rotation angle, the thread pitches of the through holes of the outer screw 132, the inner screw 16 and the connecting arm 113, for example, the larger the number of teeth of the ratchet wheel 131 is, the smaller the rotation angle of each time is, the smaller the dosage of each time is, and the more accurate the dosage of each time is, so those skilled in the art can set the rotation angle of the swing arm 112, the number of teeth of the ratchet wheel 131 and the rotation angle, and the thread pitches of the through holes of the outer screw 132, the inner screw 16 and the connecting arm 113 according to the dosage of each time.

For a better understanding of the operation of the device, it will be described below by means of a specific embodiment in which the source of driving force is the driving wire 19, the ratchet has 100 teeth, and the limit base sets the limit rotation angle to 3.6 °.

In the first stage, as shown in fig. 4 and 5, the right driving wire 19 is energized, the right driving wire 19 contracts to generate driving force, the right swing arm 112 is pushed to drive the swing module 11 to rotate clockwise, the swing arm stops rotating when the right swing arm 112 rotates clockwise by 3.6 ° to reach the limiting surface of the first limiting base 151, and at the same time, the swing arm limits the push module 12 by the limiting surface of the push module 12, in the process, the swing arm 112 drives the push module 12 and the ratchet 131 to rotate one tooth clockwise, thereby driving the outer screw 132 to rotate clockwise, and because the base 114 is axially fixed, the swing arm 112 and the outer screw 132 cannot axially move, the inner screw 16 is rotated out of the outer screw 132 axially upwards, and the piston 17 is pushed to move upwards to press out the liquid medicine in the medicine tank 18.

In the second stage, as shown in fig. 6 and 7, the left driving wire 19 is energized, the left driving wire 19 contracts to generate driving force, the left swing arm 112 is pushed to drive the swing module 11 to rotate anticlockwise, when the left swing arm 112 rotates anticlockwise by 3.6 ° to reach the limiting surface of the second limiting base 152, the swing arm stops rotating, and at the same time, the swing arm limits the push module 12 through the limiting surface of the push module 12, in the process, the swing arm 112 drives the push module 12 to rotate beyond the ratchet 131 due to the fact that the ratchet 131 is fixed under the action of the unidirectional stop piece 142, and meanwhile, the outer screw 132 and the inner screw 16 cannot rotate, so that the outer screw 132 rotates upwards in the axial direction from the connecting arm 113, drives the ratchet 131 and the inner screw 16 to move upwards in the axial direction, and pushes the piston 17 to move upwards to press the medicine liquid in the medicine tank 18. At this time, the swing arm 112 completes the first reciprocation.

The first stage and the second stage, that is, the left driving wire and the right driving wire are alternately energized until the piston 17 reaches the top end of the medicine tank 18 to stop working, and it is to be noted that, when in use, a user can work through the required medicine amount control device for a period of time, for example, the output of medicine liquid corresponding to each stage is 1ml, if the medicine amount is 1ml each time, the device works for one stage, and if the medicine amount is 3ml each time, the device works for three stages, so that accurate control of medicine amount is realized.

In another specific example, the ratchet has 50 teeth, the pushing pieces of the two pushing modules 12 may be not equal in length, but have a stroke amount different by 3.6 °, so that the pushing piece of the right pushing module 12 can be pushed when rotating in the first direction, at this time, the pushing piece of the left pushing module 12 does not contact the tooth surface and does not work between the two teeth, the pushing piece of the right pushing module 12 returns to the middle position of the next two teeth when reversing in the second direction, the pushing piece of the left pushing module 12 returns to the next tooth surface, so that the pushing piece of the left pushing module 12 works when rotating forward again, the pushing piece of the right pushing module 12 does not work, and the reciprocating cycle can also realize 3.6 ° of each rotation.

The medicine injection device provided by the embodiment of the utility model adopts a double-swing arm and double-screw structure, has strong stability, compact structure and small volume, and is convenient to carry; the accurate injection of the dosing amount can be realized through the ratchet wheel setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.

In the present utility model, the term "plurality" means two or more, unless explicitly defined 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 connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description herein, the terms "one particular embodiment," "some embodiments," "one embodiment," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (9)

1. A drug infusion device, the device comprising:

the swinging module comprises two first guide rails, two swinging arms, a connecting arm and a base; the first guide rails are arranged on the inner sides of the swing arms, the top ends of the two first guide rails and the two swing arms are fixed on the connecting arms, and the bottom ends of the two first guide rails and the two swing arms are fixed on the base; a through hole is formed in the middle of the connecting arm;

the two pushing modules are respectively sleeved on the two first guide rails and can axially move along the first guide rails;

the rotating module comprises a ratchet wheel and an outer screw; wherein the ratchet is driven by the pushing module; the outer screw is vertical and fixed on the ratchet wheel, the outer screw is provided with an external thread and an internal thread, and the external thread is in threaded connection with the through hole of the connecting arm;

the unidirectional stop module is connected with the ratchet wheel and used for controlling the ratchet wheel to rotate unidirectionally;

the limiting module is used for limiting the swing arm, and stopping rotating when the swing arm rotates to the limiting module;

the inner screw is arranged in the outer screw and is in threaded connection with the inner thread of the outer screw;

the piston is fixedly connected with the top end of the inner screw rod;

and the medicine tank is used for loading medicine liquid, is sleeved on the piston, and can press out the medicine liquid in the medicine tank when the piston moves upwards.

2. The drug infusion device of claim 1, wherein the limit module comprises a first limit base and a second limit base;

stopping rotating when the swing arm rotates to the first limit base;

and stopping rotating when the swing arm rotates to the second limit base.

3. The drug infusion device of claim 1, further comprising two drive wires connected to each of the two swing arms for driving the swing arms in rotation.

4. The drug infusion device of claim 1, further comprising a first mount, the base being secured to the first mount by a swivel axis.

5. The drug infusion device of claim 4, wherein the device further comprises a back plate and a second support;

the backboard is fixedly connected with the side face of the first support;

the second support is fixed between the connecting arm and the backboard.

6. The drug infusion device of claim 5, wherein the unidirectional stopper module comprises a second rail and a stopper tab;

the top end of the second guide rail is fixed on the second support, and the bottom end of the second guide rail is fixed on the first support;

the stop piece is sleeved on the second guide rail and connected with the ratchet wheel to control the ratchet wheel to rotate unidirectionally.

7. The drug infusion device of claim 1, wherein the drug infusion is performed

The working process of the equipment comprises the following steps:

the first stage, the swing arm rotates along the first direction under the action of the first driving force until the swing arm stops when rotating to the limit module, in the process, the swing arm drives the pushing module to rotate along with the rotation, the pushing module drives the ratchet wheel and the outer screw rod to rotate along the first direction, and the base is fixed, so that the swing arm and the outer screw rod cannot axially move, and the inner screw rod axially and upwards rotates out of the outer screw rod, so that the piston is pushed to upwards move to press out the liquid medicine in the medicine tank;

the second stage, the swing arm rotates along the second direction under the action of the second driving force until the swing arm rotates to the limit module, in the process, the swing arm drives the pushing module to rotate beyond the ratchet wheel under the action of the unidirectional stop module, and the outer screw rod and the inner screw rod cannot rotate, so that the outer screw rod is rotated out of the connecting arm in the axial direction upwards to drive the ratchet wheel and the inner screw rod to move in the axial direction upwards, and the piston is pushed to move upwards to press out the liquid medicine in the medicine tank;

and cycling the first stage and the second stage until the piston reaches the top end of the medicine tank to stop working.

8. The drug infusion device of claim 7, wherein the first direction is clockwise or counter-clockwise and the second direction is opposite the first direction.

9. The drug infusion device of claim 7, wherein the swing arm has the same rotational angle in both the first and second stages.