Insulin pump

Abstract

The utility model discloses an insulin pump in the technical field of insulin injection, which comprises a shell and a mounting cavity arranged in the shell, and a flexible stocker is arranged at the bottom of the mounting cavity. A guide rod and a lead screw which are parallel to each other are arranged at the bottom of the mounting cavity, the guide rod is fixedly mounted on the shell, and the end part of the lead screw is rotationally mounted on the shell through a bearing; one end of the sliding block is in threaded connection with the lead screw, and the other end of the sliding block is in sliding connection with the guide rod. A driving assembly is installed at one end of the lead screw and used for driving the lead screw to rotate. A scraper is installed below the sliding block through an elastic structure so that the scraper can be tightly attached to the flexible storage device.

Description

Technical Field

[0001] The utility model relates to the technical field of insulin injection, in particular to an insulin pump. Background Art

[0002] The insulin pump consists of a pump, an insulin reservoir, and an infusion tube connected to it. The small syringe can hold up to 3 ml of insulin. After the syringe is loaded into the pump, the guide needle at the front end of the connected infusion tube is inserted into the patient's subcutaneous tissue (usually the abdominal wall) with a needle injector, and then the battery-driven spiral motor of the insulin pump pushes the piston of the small syringe to infuse insulin into the body. The basic purpose of the insulin pump is to simulate the secretion function of the pancreas, and continuously push insulin into the user's subcutaneous tissue according to the dosage required by the human body to maintain blood sugar stability throughout the day, so as to achieve the purpose of controlling diabetes.

[0003] CN201521104128.9 proposes an improvement to the insulin pump by using a flexible plastic drug reservoir instead of a traditional syringe to reduce costs.

[0004] In the above patent, the pressing roller is connected to a gear, which is then meshed with a rack, and the gear is driven to rotate by a motor, thereby causing the pressing roller to roll forward to squeeze out the insulin in the plastic medicine container.

[0005] However, the connection between the above-mentioned components is a rigid connection, and vibration will inevitably occur during the operation of the machine, which may cause a gap between the pressing roller and the plastic medicine reservoir, resulting in insulin residue in the plastic medicine reservoir. Utility Model Content

[0006] In order to solve the above technical problems, the utility model specifically provides an insulin pump, including a shell and an installation cavity arranged in the shell, a flexible reservoir is placed at the bottom of the installation cavity, and the shell is provided with a hole for the liquid outlet end of the flexible reservoir to extend out.

[0007] A guide rod and a screw rod parallel to each other are arranged at the bottom of the installation cavity, the guide rod is fixedly installed on the housing, and the end of the screw rod is rotatably installed on the housing through a bearing;

[0008] One end of the slider is threadedly connected to the screw rod, and the other end is slidably connected to the guide rod;

[0009] A driving assembly is installed at one end of the screw rod, for driving the screw rod to rotate;

[0010] The scraper is installed below the sliding block through an elastic structure so that the scraper can fit closely to the flexible material storage container.

[0011] As a preferred solution of the utility model, the blade of the scraper is arc-shaped and inclined in the moving direction capable of squeezing out insulin.

[0012] As a preferred solution of the utility model, the elastic structure includes a guide rod and a spring;

[0013] The guide rod passes through the slider, the lower end of the guide rod is fixedly connected to the scraper, and the upper end of the guide rod is fixedly connected to the limit plate;

[0014] The outer sleeve of the guide rod is provided with a spring, and the two ends of the spring respectively abut against the slider and the scraper;

[0015] When the blade of the scraper contacts the flexible material storage container, the spring is in a compressed state.

[0016] As a preferred solution of the utility model, at least two groups of the elastic structures are provided.

[0017] As a preferred solution of the utility model, the driving assembly includes a servo motor fixedly mounted on the housing, and the servo motor is arranged perpendicular to the screw rod;

[0018] A first bevel gear is fixedly mounted on the rotating shaft of the servo motor, a second bevel gear is fixedly mounted on the end of the screw rod, and the first bevel gear is meshed with the second bevel gear.

[0019] As a preferred solution of the utility model, a through hole is provided at the bottom of the installation cavity corresponding to the placement position of the flexible material storage container, and a lifting plate is connected to the bottom of the shell through a telescopic rod;

[0020] The upper end surface of the lifting plate is provided with a positioning column, and the positioning column cooperates with the positioning hole on the edge of the flexible material storage container to fix the flexible material storage container;

[0021] When the insulin pump is in use, the lifting plate blocks the through hole, and the upper end surface of the lifting plate is flush with the bottom surface of the installation cavity;

[0022] The lifting plate can be fixed to the housing via a fixing member.

[0023] As a preferred solution of the utility model, the flexible storage container comprises a central storage cavity for storing insulin and a thin sheet at the edge, and the positioning hole is arranged on the thin sheet.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The slider is driven to move by a driving mechanism and a screw rod, and a scraper is installed under the slider through an elastic structure. Due to the presence of the elastic structure, even if mechanical vibration is inevitable during the movement of the slider, the elastic structure can exert pressure on the scraper so that the scraper is always in close contact with the flexible reservoir, completely squeezing out the insulin and avoiding insulin residue in the flexible reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation mode of the utility model or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below.

[0027] Obviously, the drawings described below are merely exemplary, and a person skilled in the art can derive other implementation drawings based on the provided drawings without any creative effort.

[0028] Figure 1 This is a schematic diagram of the top view of the insulin pump in the embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the through hole and the lifting plate in the embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of an insulin pump in an embodiment of the utility model;

[0031] Figure 4 It is a schematic diagram of the scraper and the elastic structure in the embodiment of the utility model;

[0032] Figure 5 It is a schematic diagram of the structure of the flexible material storage device in the embodiment of the utility model.

[0033] The numbers in the figure represent the following:

[0034] 1-housing, 2-installation cavity;

[0035] 3-flexible material storage container, 301-liquid outlet, 302-storage cavity, 303-sheet, 304-positioning hole;

[0036] 4-hole, 5-guide rod, 6-screw rod, 7-scraper;

[0037] 8-elastic structure, 801-sliding rod, 802-spring, 803-limiting plate;

[0038] 9-slider, 10-servo motor, 11-first bevel gear, 12-second bevel gear, 13-through hole, 14-telescopic rod, 15-lifting plate, 16-positioning column. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The utility model specifically provides an insulin pump, comprising a housing 1 and a mounting cavity 2 arranged in the housing 1, a flexible reservoir 3 is placed at the bottom of the mounting cavity 2, and a hole 4 is arranged on the housing 1 for a liquid outlet 301 of the flexible reservoir 3 to extend out;

[0041] A guide rod 5 and a screw rod 6 are provided at the bottom of the installation cavity 2 in parallel with each other. The guide rod 5 is fixedly mounted on the housing 1, and the end of the screw rod 6 is rotatably mounted on the housing 1 through a bearing.

[0042] One end of the slider 9 is threadedly connected to the screw rod 6, and the other end is slidably connected to the guide rod 5;

[0043] A driving assembly is installed at one end of the screw rod 6 for driving the screw rod 6 to rotate;

[0044] The scraper 7 is installed below the slider 9 via an elastic structure 8 so that the scraper 7 can fit tightly against the flexible accumulator 3 .

[0045] The working process of the insulin pump is as follows:

[0046] The flexible reservoir 3 filled with insulin is placed at the bottom of the mounting cavity 2 , and the liquid outlet 301 of the flexible reservoir 3 is extended through the hole 4 to the outside of the housing 1 . At this time, the blade of the scraper 7 is in close contact with the flexible reservoir 3 under the action of the elastic structure 8 .

[0047] Start the driving assembly, which drives the screw rod 6 to rotate, thereby causing the slider 9 to translate along the screw rod 6 and the guide rod 5. When the slider 9 moves, it will drive the scraper 7 below it to move synchronously. When the scraper 7 translates, it can drive the insulin in the flexible reservoir 3 to the liquid outlet 301 of the flexible reservoir 3 to squeeze the insulin out.

[0048] Due to the presence of the elastic structure 8, even if the slider 9 inevitably vibrates mechanically during movement, the elastic structure 8 can apply pressure to the scraper 7 so that the scraper 7 is always in close contact with the flexible reservoir 3, completely squeezing out the insulin and avoiding insulin residue in the flexible reservoir 3.

[0049] It should be noted that a thin sheet 303 should be provided at the rear end of the flexible material storage container 3 , the edge of the thin sheet 303 does not contain insulin, and the scraper 7 is in close contact with the thin sheet 303 at the beginning.

[0050] Furthermore, in order to prevent the scraper 7 from scratching the flexible hopper 3 during movement, the blade of the scraper 7 is set to be in an arc shape;

[0051] In order to make the scraper 7 more suitable for squeezing out insulin, the blade is inclined in the moving direction capable of squeezing out insulin.

[0052] Further, the elastic structure 8 includes a slide bar 801 and a spring 802;

[0053] The slide bar 801 passes through the slide block 9 , and its lower end is fixedly connected to the scraper 7 , and its upper end is fixedly connected to the limit plate 803 .

[0054] The outer sleeve of the slide bar 801 is provided with a spring 802, and the two ends of the spring 802 respectively abut against the slide block 9 and the scraper 7;

[0055] When the blade of the scraper 7 contacts the flexible accumulator 3 , the spring 802 is in a compressed state.

[0056] On the one hand, the slide bar 801 connects the slider 9 and the scraper 7 so that the scraper 7 can move synchronously with the slider 9; on the other hand, it plays a guiding role so that the scraper 7 can move up and down relative to the slider 9, so that the spring 802 can normally apply elastic force to the scraper 7.

[0057] The function of the limiting plate 803 is to prevent the sliding rod 801 from falling off the sliding block 9 downward.

[0058] When slight mechanical vibration occurs, the elastic force exerted by the compression spring 802 on the scraper 7 can keep the scraper 7 in close contact with the flexible reservoir 3 at all times, avoiding the formation of a gap between the scraper 7 and the flexible reservoir 3, and eliminating the possibility of insulin penetrating to the back side of the scraper 7 through the gap.

[0059] Furthermore, in order to ensure that the contact surface between the blade of the scraper 7 and the flexible material storage container 3 is subjected to uniform force, at least two groups of elastic structures 8 are provided, which are respectively located on the left and right sides of the scraper 7 .

[0060] Furthermore, the drive assembly includes a servo motor 10 fixedly mounted on the housing 1, and the servo motor 10 is arranged perpendicular to the screw rod 6 to save lateral space in the installation cavity 2, so that the length of the screw rod 6 can be longer within a limited space, thereby increasing the movable range of the scraper 7.

[0061] The specific transmission relationship between the servo motor 10 and the screw rod 6 is as follows:

[0062] A first bevel gear 11 is fixedly mounted on the rotating shaft of the servo motor 10 , and a second bevel gear 12 is fixedly mounted on the end of the screw rod 6 . The first bevel gear 11 is meshed with the second bevel gear 12 .

[0063] At the same time, it is understandable that different patients have different requirements for the speed of insulin injection, and the gear rack transmission mode of the existing insulin pump in the background technology is not suitable for slow injection. However, the screw rod 6, the slider 9 and the servo motor 10 in the utility model can make the scraper 7 move at an extremely slow speed, which can meet the demand for slow insulin injection.

[0064] Furthermore, considering that it is inconvenient to install the flexible hopper 3 due to the existence of the screw rod 6, the guide rod 5, the scraper 7 and other components, the utility model proposes the following solution:

[0065] A through hole 13 is provided at the bottom of the installation cavity 2 corresponding to the placement position of the flexible material storage container 3, and a lifting plate 15 is connected to the bottom of the housing 1 through a telescopic rod 14;

[0066] The upper end surface of the lifting plate 15 is provided with a positioning column 16, and the positioning column 16 cooperates with the positioning hole 304 on the edge of the flexible material storage container 3 to fix the flexible material storage container 3;

[0067] When the insulin pump is in use, the lifting plate 15 blocks the through hole 13, and the upper end surface of the lifting plate 15 is flush with the bottom surface of the installation cavity 2;

[0068] The lifting plate 15 can be fixed to the housing 1 via a fixing member.

[0069] When the flexible hopper 3 is filled, the fixing between the lifting plate 15 and the shell 1 is released by the fixing piece, so that the lifting plate 15 naturally falls away from the shell 1 under the action of gravity. At this time, the telescopic rod 14 is extended, and the telescopic rod 14 prevents the lifting plate 15 from separating from the shell 1.

[0070] After the lifting plate 15 is away from the housing 1 , there is sufficient operating space between the lifting plate 15 and the housing 1 for installing the flexible material storage container 3 on the lifting plate 15 .

[0071] When the flexible stocker 3 is installed, the positioning posts 16 are inserted into the positioning holes 304 at the edge of the flexible stocker 3 to fix the position of the flexible stocker 3 .

[0072] Then, the lifting plate 15 is reset to block the through hole 13 , and the flexible material storage container 3 enters the housing 1 , and the blade of the scraper 7 contacts the thin sheet 303 of the flexible material storage container 3 .

[0073] When the scraper 7 moves, the insulin in the storage cavity 302 in the middle of the flexible storage container 3 is driven toward the liquid outlet 301 and squeezed out.

[0074] That is, the flexible storage container 3 is composed of a storage cavity 302 in the middle for storing insulin, a thin sheet 303 at the edge and a liquid outlet 301 at the end, and a positioning hole 304 is provided on the thin sheet 303 .

[0075] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. An insulin pump, characterized in that: The invention comprises a housing (1) and a mounting cavity (2) arranged in the housing (1); a flexible material storage container (3) is placed at the bottom of the mounting cavity (2); and a hole (4) is provided on the housing (1) for a liquid outlet end (301) of the flexible material storage container (3) to extend out. A guide rod (5) and a screw rod (6) parallel to each other are arranged at the bottom of the installation cavity (2); the guide rod (5) is fixedly mounted on the housing (1); and the end of the screw rod (6) is rotatably mounted on the housing (1) via a bearing; One end of the slider (9) is threadedly connected to the screw rod (6), and the other end is slidably connected to the guide rod (5); A driving assembly is installed at one end of the screw rod (6) for driving the screw rod (6) to rotate; The scraper (7) is installed below the slider (9) via an elastic structure (8) so that the scraper (7) can fit tightly against the flexible material storage container (3).

2. An insulin pump according to claim 1, characterized in that: The blade of the scraper (7) is arc-shaped and inclined in a moving direction capable of squeezing out insulin.

3. An insulin pump according to claim 2, characterized in that: The elastic structure (8) comprises a slide bar (801) and a spring (802); The sliding rod (801) passes through the sliding block (9), the lower end of which is fixedly connected to the scraper (7), and the upper end of which is fixedly connected to the limiting plate (803); The outer sleeve of the sliding rod (801) is provided with a spring (802), and the two ends of the spring (802) respectively abut against the sliding block (9) and the scraper (7); When the blade of the scraper (7) contacts the flexible material storage container (3), the spring (802) is in a compressed state.

4. An insulin pump according to claim 3, characterized in that: The elastic structure (8) is provided in at least two groups.

5. An insulin pump according to claim 1, characterized in that: The driving assembly comprises a servo motor (10) fixedly mounted on the housing (1), and the servo motor (10) is arranged perpendicular to the screw rod (6); A first bevel gear (11) is fixedly mounted on the rotating shaft of the servo motor (10), a second bevel gear (12) is fixedly mounted on the end of the screw rod (6), and the first bevel gear (11) is meshed with the second bevel gear (12).

6. An insulin pump according to claim 1, characterized in that: A through hole (13) is provided at the bottom of the installation cavity (2) corresponding to the placement position of the flexible material storage container (3), and a lifting plate (15) is connected to the bottom of the housing (1) via a telescopic rod (14); The upper end surface of the lifting plate (15) is provided with a positioning column (16), and the positioning column (16) cooperates with the positioning hole (304) on the edge of the flexible material storage container (3) to fix the flexible material storage container (3); When the insulin pump is in use, the lifting plate (15) blocks the through hole (13), and the upper end surface of the lifting plate (15) is flush with the bottom surface of the installation cavity (2); The lifting plate (15) can be fixed to the housing (1) via a fixing member.

7. An insulin pump according to claim 6, characterized in that: The flexible storage container (3) is composed of a central storage cavity (302) for storing insulin, a thin sheet (303) at the edge, and a liquid outlet (301) at the end, and the positioning hole (304) is arranged on the thin sheet (303).

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