Portable dual-channel infusion pump

Abstract

The present invention discloses a portable dual-channel infusion pump, which includes a casing, a motor, a channel switching mechanism, a power supply mechanism, a medicine pushing mechanism, a medicine storage tube and a control member. The channel switching mechanism includes a driving gear and a one-way transmission assembly. The driving gear is installed outside the output shaft of the motor. Two one-way transmission assemblies are arranged corresponding to the two infusion channels. The one-way transmission assembly includes a core shaft, a driven gear and a wheel lock. The core shaft is rotatably connected to the casing. The driven gear is sleeved outside the core shaft and meshes with the driving gear. The wheel lock is arranged between the core shaft and the driven gear and can automatically lock and limit the synchronous rotation of the core shaft when the driven gear rotates in one direction, and automatically unlock and drive the core shaft to rotate accordingly when the driven gear rotates in the other direction. The locked and unlocked states of the two one-way transmission assemblies are opposite in real time, and the device is small in size.

Description

Technical field

[0001] The present invention relates to the technical field of infusion pumps, in particular to the technical field of portable dual-channel infusion pumps. [Background Technology]

[0002] Currently, one of the effective measures for treating diabetes is insulin injection. As an intelligent infusion device, the infusion pump can use mechanical driving force to accurately control the number of infusion drops or the infusion flow rate, ensuring that the dose enters the patient's body accurately and safely, thereby greatly improving the accuracy and safety of the infusion. It is recognized as the preferred medical device for insulin injection. However, since the infusion pump is used by the patient to actively input the injection parameters based on experience, and the human body's response to insulin varies due to factors such as menstruation, diet, and activity level, the patient may experience an overdose of insulin after the injection is completed, which in turn causes hypoglycemia, which can even be life-threatening in severe cases. In addition, because traditional infusion pumps usually use a single-channel design and can only achieve the infusion of one liquid medicine, patients can only use an additional infusion pump to infuse glucagon or quickly eat some high-sugar food to relieve the symptoms. The entire blood sugar regulation method is relatively cumbersome.

[0003] In order to meet the needs of patients with diseases such as diabetes who are able to infuse two kinds of liquid medicine at the same time during treatment, some manufacturers choose to design their infusion pumps as a dual-channel structure, such as the dual-channel injection pump disclosed in the utility model patent with announcement number CN215023925U and the dual-channel injection pump with an interactive interface disclosed in the appearance patent with announcement number CN305057425S. However, such dual-channel infusion pumps usually require two motors to control the infusion of liquid medicine in the two channels respectively, resulting in a large size of the whole machine, complex control, and inconvenient portability. In addition, some manufacturers have adopted a multi-channel design with more than two channels, such as a new multi-channel combined micro-injection pump disclosed in the utility model patent with announcement number CN209004910U, but each channel still needs to be equipped with a dedicated motor, and there are the same technical problems as the dual-channel infusion pump.

[0004] In addition, when installing a new drug storage tube in an existing infusion pump, since whether the drug storage tube is installed in place depends entirely on experience, there is a possibility that the drug solution cannot be normally pushed out due to the position of the drug storage tube being offset, thereby affecting the accuracy of drug solution infusion. [Summary of the invention]

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose a portable dual-channel infusion pump that can effectively reduce the size of the device.

[0006] To achieve the above objectives, the present invention provides a portable dual-channel infusion pump, comprising a housing, a motor, a channel switching mechanism, a power supply, a drug push mechanism, a drug storage tube, and a control member. Two parallel infusion channels are provided within the inner cavity of the housing, into which the drug push mechanism and the drug storage tube can be detachably placed. The channel switching mechanism includes a driving gear and a one-way transmission assembly. The driving gear is mounted outside the output shaft of the motor. Two one-way transmission assemblies are provided corresponding to the two infusion channels. The one-way transmission assembly includes a core shaft, a driven gear, and a wheel lock. The core shaft is rotatably connected to the housing. The driven gear is sleeved outside the core shaft and meshes with the driving gear. The wheel lock is provided between the core shaft and the driven gear and automatically locks and restricts synchronous rotation of the core shaft when the driven gear rotates in one direction, and automatically unlocks and drives the core shaft to rotate accordingly when the driven gear rotates in the other direction. The locked and unlocked states of the two one-way transmission assemblies are reversed in real time. The drug push mechanism is driven by the corresponding core shaft to rotate and push the corresponding liquid pressure plate of the drug storage tube to achieve drug infusion.

[0007] Preferably, a notch is provided on the shaft wall of the core shaft, and one-way teeth are provided on the hole wall of the wheel body through hole of the driven gear. The wheel lock includes a pawl and a return spring. One end of the pawl is hinged to the core shaft in the notch and the other end can be extended or retracted into the notch. The return spring is installed in the notch and is located between the core shaft and the pawl. When the driven gear rotates in one direction, the free end of the pawl can be pushed out of the notch by the return spring and engage with the one-way teeth to drive the core shaft to rotate synchronously. When the driven gear rotates in another direction, it can be squeezed into the notch by the one-way teeth and limit the synchronous rotation of the core shaft.

[0008] Preferably, the power supply mechanism is installed on the casing and includes a compartment, a battery and a compartment cover. Several batteries can be placed in the compartment of the compartment and power the motor and the control parts respectively. The opening of the compartment is opened and closed by the compartment cover.

[0009] Preferably, the medicine pushing mechanism includes a screw and a push sleeve, wherein the push sleeve is provided with a threaded hole in the sleeve body. The screw is completely screwed into the threaded hole in the sleeve body in the initial state and can be gradually screwed out of the threaded hole in the sleeve body when driven to rotate by the corresponding core shaft.

[0010] Preferably, the one-way transmission assembly also includes a positioning seat, which is installed at the end of the core shaft facing away from the motor. The opposite ends of the screw rod and the push sleeve are respectively provided with a rod body plug and a sleeve body plug, and the rod body plug and the sleeve body plug are respectively plugged into the corresponding positioning seat and pressure plate.

[0011] Preferably, the positioning seat is provided with a button at one end facing the screw rod, and the push sleeve is provided with a conductive film at one end facing the screw rod. When the medicine pushing mechanism in the initial state is placed in the infusion channel, the conductive film can press the corresponding button.

[0012] Preferably, the liquid outlet of the medicine storage tube extends out of the casing.

[0013] Preferably, the control member is mounted on the housing wall and is electrically connected to the motor and the power supply mechanism respectively, and the control member is a touch screen.

[0014] Beneficial effects of the present invention:

[0015] 1) By providing a driving gear and two complementary and symmetrical one-way transmission components to form a channel switching mechanism, the forward and reverse rotation of a motor can be used to switch the locked and unlocked states of the two one-way transmission components, thereby simultaneously controlling the infusion of liquid medicine in two infusion channels. This can effectively reduce the size of the device and facilitate its portability for patients who require long-term injection of two drugs;

[0016] 2) A wheel lock is formed by providing a stop pawl and a return spring. At the same time, a notch and a one-way tooth are provided on the shaft wall of the core shaft and the hole wall of the wheel body through hole of the driven gear. The one-way tooth and the return spring can cooperate with each other to adjust the position of the stop pawl, thereby realizing the rotation control of the core shaft. The structure is simple and easy to process.

[0017] 3) The medicine pushing mechanism is composed of a screw rod and a push sleeve, with one end of the screw rod and the push sleeve being threadedly connected and the other end being provided with a rod body plug and a sleeve body plug, respectively. The installation is convenient, and the conductive film provided on the end of the push sleeve facing the screw rod can also cooperate with the button installed on the positioning seat, thereby prompting the user whether the medicine pushing mechanism and the medicine storage tube are installed in place, thereby ensuring smooth infusion of the medicine solution.

[0018] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings.

Brief Description of the Drawings

[0019] Figure 1 1 is a schematic diagram of the three-dimensional structure of the portable dual-channel infusion pump of the present invention;

[0020] Figure 2 1 is an exploded schematic diagram of the portable dual-channel infusion pump of the present invention;

[0021] Figure 3 3D schematic diagram of the channel switching mechanism of the portable dual-channel infusion pump of the present invention;

[0022] Figure 4 1 is a schematic diagram of a half-section structure of a one-way transmission assembly of a portable dual-channel infusion pump of the present invention;

[0023] Figure 5 It is a schematic diagram of the assembly of the medicine pushing mechanism and the medicine storage tube of the portable dual-channel infusion pump of the present invention.

[0024] In the figure: 1-housing, 2-motor, 3-channel switching mechanism, 31-driving gear, 32-one-way transmission assembly, 321-core shaft, 3211-notch, 322-driven gear, 3221-one-way teeth, 323-stop claw, 324-reset spring, 325-positioning seat, 4-power supply mechanism, 41-battery, 42-bin cover, 5-medicine pushing mechanism, 51-screw, 511-rod body plug, 52-push sleeve, 521-sleeve body plug, 53-conductive film, 6-medicine storage tube, 7-control part. [Specific implementation method]

[0025] See Figures 1 to 5 The portable dual-channel infusion pump of the present invention includes a housing 1, a motor 2, a channel switching mechanism 3, a power supply mechanism 4, a drug pushing mechanism 5, a drug storage tube 6 and a control member 7. The inner cavity of the housing 1 is provided with two parallel infusion channels that can simultaneously and detachably accommodate the drug pushing mechanism 5 and the drug storage tube 6. The channel switching mechanism 3 includes a driving gear 31 and a one-way transmission assembly 32. The driving gear 31 is installed outside the output shaft of the motor 2. The two one-way transmission assemblies 32 are arranged corresponding to the two infusion channels. The one-way transmission assembly 32 includes a core shaft 321, a driven gear 322 and a wheel lock. The core shaft 3 21 is rotatably connected to the casing 1, the driven gear 322 is sleeved outside the core shaft 321 and meshes with the driving gear 31, the wheel lock is set between the core shaft 321 and the driven gear 322 and can automatically lock and limit the synchronous rotation of the core shaft 321 when the driven gear 322 rotates in one direction, and automatically unlock and drive the core shaft 321 to rotate accordingly when the driven gear 322 rotates in the other direction. The locked and unlocked states of the two one-way transmission components 32 are opposite in real time. The medicine pushing mechanism 5 is driven to rotate by the corresponding core shaft 321 and pushes the liquid pressure plate of the corresponding medicine storage tube 6 to realize liquid medicine infusion.

[0026] The shaft wall of the core shaft 321 is provided with a notch 3211, and the wall of the wheel body through hole of the driven gear 322 is provided with a one-way tooth 3221. The wheel lock includes a pawl 323 and a return spring 324. One end of the pawl 323 is hinged to the core shaft 321 in the notch 3211 and the other end can be extended or retracted into the notch 3211. The return spring 324 is installed in the notch 3211 and is located between the core shaft 321 and the pawl 323. When the driven gear 322 rotates in one direction, the free end of the pawl 323 can be pushed out of the notch 3211 by the return spring 324 and engage with the one-way tooth 3221 to drive the core shaft 321 to rotate synchronously. When the driven gear 322 rotates in the other direction, it can be squeezed into the notch 3211 by the one-way tooth 3221 and limit the synchronous rotation of the core shaft 321.

[0027] The power supply mechanism 4 is installed on the casing 1 and includes a compartment, a battery 41 and a compartment cover 42. Several batteries 41 can be placed in the compartment of the compartment and power the motor 2 and the control part 7 respectively. The opening of the compartment is opened and closed by the compartment cover 42.

[0028] The medicine pushing mechanism 5 includes a screw rod 51 and a pushing sleeve 52. A threaded hole is provided in the pushing sleeve 52. The screw rod 51 is completely screwed into the threaded hole in the sleeve in the initial state and can be gradually screwed out of the threaded hole in the sleeve when driven to rotate by the corresponding core shaft 321.

[0029] The one-way transmission assembly 32 also includes a positioning seat 325, which is installed at the end of the core shaft 321 facing away from the motor 2. The opposite ends of the screw rod 51 and the push sleeve 52 are respectively provided with a rod body plug 511 and a sleeve plug 521, and the rod body plug 511 and the sleeve plug 521 are respectively plugged into the corresponding positioning seat 325 and the pressure plate.

[0030] The positioning seat 325 is provided with a button at one end facing the screw rod 51, and the pushing sleeve 52 is provided with a conductive film 53 at one end facing the screw rod 51. When the medicine pushing mechanism 5 is in the initial state and is placed in the infusion channel, the conductive film 53 can press the corresponding button.

[0031] The liquid outlet of the medicine storage tube 6 extends out of the casing 1 .

[0032] The control member 7 is mounted on the housing wall of the housing 1 and is electrically connected to the motor 2 and the power supply mechanism 4 respectively. The control member 7 is a touch screen.

[0033] Working process of the present invention:

[0034] Before infusion, the operator can interact with the control unit 7 to set parameters such as the rotation direction, speed, and number of rotations of the motor 2's output shaft to control the infusion volume and rate of the two drugs. During infusion, when the motor 2's output shaft rotates clockwise, one core shaft 321 rotates while the other core shaft 321 remains stationary, causing the drug storage tube 6 corresponding to the rotating core shaft 321 to receive drug infusion while the other drug storage tube 6 does not. Furthermore, when the motor 2's output shaft rotates counterclockwise, the drug infusion status of the two drug storage tubes 6 is swapped. In other words, by adjusting the forward and reverse rotation of the motor 2's output shaft, drug injection can be controlled separately for both infusion channels. Furthermore, parameters such as the motor 2's output shaft's rotation direction, speed, and number of rotations can be controlled by the electronic software and hardware circuitry of the control unit 7. This is common knowledge in the art and will not be further described.

[0035] See Figure 4 For one of the one-way transmission assemblies 32, when the driven gear 322 rotates clockwise, the free end of the pawl 323 is pushed out of the notch 3211 by the return spring 324 and engages with one of the one-way teeth 3221, allowing the core shaft 321 to be driven by the driven gear 322 to rotate synchronously clockwise. This in turn drives the corresponding screw rod 51 to rotate clockwise, causing the push sleeve 52 to gradually press the corresponding liquid pressure plate outward to achieve drug infusion. When the driven gear 322 rotates counterclockwise, the free end of the pawl 323 is squeezed into the notch 3211 by the one-way teeth 3221, restricting the synchronous rotation of the core shaft 321, thus preventing drug infusion. Furthermore, the rotation of the core shaft 321 of the other one-way transmission assembly 32 is exactly opposite to that of the core shaft 321 of the one-way transmission assembly 32.

[0036] When the liquid medicine in one of the drug storage tubes 6 is completely squeezed out, it is necessary to replace the drug storage tube 6 and the corresponding drug pushing mechanism 5 together. Specifically, the new drug storage tube 6 is first placed into the housing 1, and then the new drug pushing mechanism 5 is placed between the channel switching mechanism 3 and the new drug storage tube 6. Furthermore, since the screw rod 51 of the new drug pushing mechanism 5 is initially screwed into the deepest part of the threaded hole in the housing, the conductive film 53 can press the corresponding button, causing the control member 7 to indicate that the drug pushing mechanism 5 and drug storage tube 6 are fully installed. Furthermore, if the screw rod 51 is fully screwed back into the threaded hole in the housing, the drug pushing mechanism 5 can be reused to reduce usage costs.

[0037] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. Portable dual-channel infusion pump, characterized by: The invention comprises a housing (1), a motor (2), a channel switching mechanism (3), a power supply mechanism (4), a medicine pushing mechanism (5), a medicine storage tube (6) and a control member (7). The inner cavity of the housing (1) is provided with two parallel infusion channels capable of simultaneously and detachably inserting the medicine pushing mechanism (5) and the medicine storage tube (6). The channel switching mechanism (3) comprises a driving gear (31) and a one-way transmission component (32). The driving gear (31) is installed outside the output shaft of the motor (2). The two one-way transmission components (32) are arranged corresponding to the two infusion channels. The one-way transmission component ( 32) includes a core shaft (321), a driven gear (322) and a wheel lock, wherein the core shaft (321) is rotatably connected to the housing (1), the driven gear (322) is sleeved outside the core shaft (321) and meshed with the driving gear (31), the wheel lock is arranged between the core shaft (321) and the driven gear (322) and can automatically lock and restrict the core shaft (321) from rotating synchronously when the driven gear (322) rotates in one direction, and automatically unlock and drive the core shaft (321) to rotate accordingly when the driven gear (322) rotates in the other direction. The two one-way transmission The locked and unlocked states of the component (32) are opposite in real time. The medicine pushing mechanism (5) is driven by the corresponding core shaft (321) to rotate and push the corresponding liquid pressure plate of the medicine storage tube (6) to achieve liquid medicine infusion. The shaft wall of the core shaft (321) is provided with a notch (3211). The hole wall of the wheel body through hole of the driven gear (322) is provided with a one-way tooth (3221). The wheel lock includes a stop pawl (323) and a return spring (324). One end of the stop pawl (323) is hinged to the core shaft (321) in the notch (3211) and the other end can extend or retract into the notch. (3211), the return spring (324) is installed in the notch (3211) and is located between the core shaft (321) and the stop claw (323). When the driven gear (322) rotates in one direction, the free end of the stop claw (323) can be pushed out of the notch (3211) by the return spring (324) and engage with the one-way teeth (3221) to drive the core shaft (321) to rotate synchronously. When the driven gear (322) rotates in the other direction, the free end of the stop claw (323) can be squeezed into the notch (3211) by the one-way teeth (3221) and limit the synchronous rotation of the core shaft (321).

2. The portable dual-channel infusion pump according to claim 1, characterized in that: The power supply mechanism (4) is mounted on the housing (1) and comprises a compartment, a battery (41) and a compartment cover (42). Several sections of the battery (41) can be placed in the compartment of the compartment and supply power to the motor (2) and the control member (7). The opening of the compartment is opened and closed by the compartment cover (42).

3. The portable dual-channel infusion pump according to claim 1, wherein: The medicine pushing mechanism (5) comprises a screw rod (51) and a pushing sleeve (52), wherein the pushing sleeve (52) is provided with a threaded hole in the sleeve body. The screw rod (51) is completely screwed into the threaded hole in the sleeve body in an initial state and can be gradually screwed out of the threaded hole in the sleeve body when driven to rotate by the corresponding core shaft (321).

4. The portable dual-channel infusion pump according to claim 3, wherein: The one-way transmission assembly (32) further includes a positioning seat (325), the positioning seat (325) being mounted on an end of the core shaft (321) facing away from the motor (2), and the opposite ends of the lead screw (51) and the push sleeve (52) being provided with a rod body plug (511) and a sleeve body plug (521), respectively, the rod body plug (511) and the sleeve body plug (521) being plugged into the corresponding positioning seat (325) and the pressure plate, respectively.

5. The portable dual-channel infusion pump according to claim 4, characterized in that: A button is provided on one end of the positioning seat (325) facing the screw rod (51), and a conductive film (53) is provided on one end of the pushing sleeve (52) facing the screw rod (51). When the medicine pushing mechanism (5) is in an initial state and is placed in the infusion channel, the conductive film (53) can press the corresponding button.

6. The portable dual-channel infusion pump according to claim 1, wherein: The liquid outlet of the medicine storage tube (6) extends out of the casing (1).

7. The portable dual-channel infusion pump according to claim 1, wherein: The control member (7) is mounted on the housing wall of the housing (1) and is electrically connected to the motor (2) and the power supply mechanism (4) respectively. The control member (7) is a touch screen.

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