Soft needle implanting mechanism for application type insulin pump and application type insulin pump

Abstract

The utility model relates to the technical field of medical instruments, and discloses a soft needle implanting mechanism for an application type insulin pump and the application type insulin pump. A soft needle implanting mechanism for a pasting type insulin pump comprises a pasting piece, a fixing base, a rotary knob, a spring and a puncture assembly. The patch and the fixed seat are arranged correspondingly; the control end of the knob is used for being exposed out of an outer cover of the pasting type insulin pump so as to facilitate control operation, the opening end of the knob is arranged towards the pasting direction, and the knob is axially positioned and circumferentially and rotatably arranged on the fixed seat; the puncture assembly is arranged in the open cavity of the knob in an axial limiting manner, and a puncture part is arranged towards the patch; the spring is arranged between the puncture assembly and the knob in a pre-compression state; the knob rotates relative to the puncture assembly to relieve axial limiting of the puncture assembly, and then the elastic pre-pressure is released through the spring to push the puncture assembly to puncture. The structure is simple, operation is easy, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular, to a soft needle implantation mechanism for a patch-type insulin pump. In addition, the utility model also relates to a patch-type insulin pump comprising the soft needle implantation mechanism for the patch-type insulin pump. Background Art

[0002] With the development of medical technology, the management of chronic diseases such as diabetes is increasingly dependent on advanced medical devices. As an important diabetes management tool, insulin pumps have been widely used in clinical treatment. Traditional insulin pumps usually use hard or soft needles for subcutaneous injection to achieve continuous release of insulin, but traditional insulin pumps have problems such as large size, inconvenient to carry, and inconvenient to use.

[0003] At present, there is a smaller and more portable patch-type insulin pump, which is small in size and can be attached to the user's body and accompany the user's normal life. However, the soft needle implantation mechanism of this patch-type insulin pump is often complex in structure, inconvenient to use, and prone to misoperation, which may cause injury to the user. Some even require a separate needle aid for implantation, which is prone to secondary contamination. Utility Model Content

[0004] The utility model provides a soft needle implantation mechanism for a patch-type insulin pump and a patch-type insulin pump. The puncture part is covered inside, which has high safety. The whole soft needle implantation process is simple to operate. The whole structure for implementing the implantation is also simple, and the soft needle implantation process can even be implemented with one hand, so as to solve the technical problems of the existing soft needle implantation mechanism of the patch-type insulin pump, which has a complex structure, is inconvenient to use, and is easy to cause misoperation causing damage to the user and secondary pollution.

[0005] According to one aspect of the utility model, a soft needle implantation mechanism for a patch-type insulin pump is provided, comprising a patch, a fixing seat, a knob, a spring, and a puncture assembly; the patch is used to be installed at the bottom of the base plate of the patch-type insulin pump, the fixing seat is used to be fixed on the outer cover of the patch-type insulin pump, and the patch and the fixing seat are arranged in correspondence; the control end of the knob is used to be exposed outside the outer cover of the patch-type insulin pump to facilitate control operations, the open end of the knob is arranged toward the direction of the patch, and the knob is axially positioned and circumferentially rotatable on the fixing seat; the puncture assembly is arranged in an axially limited manner in the opening cavity of the knob and the puncture portion is arranged toward the direction of the patch, and the spring is arranged in a pre-compressed state between the puncture assembly and the knob; the knob releases the axial limit of the puncture assembly by rotating relative to the puncture assembly, and then the spring releases the elastic prepressure to push the puncture assembly for puncture.

[0006] Furthermore, a snap-on portion is provided on the side wall of the control end of the knob, which is arranged axially and has a free end toward the fixed seat, and the free end of the snap-on portion extends radially to form a snap-on block; the snap-on portions are arranged relatively to each other on both sides of the knob; the knob is snapped to the inner side of the fixed seat through the snap-on portion, and the snap-on block is used to slide circumferentially and limit axially on the inner side of the fixed seat.

[0007] Furthermore, the puncture assembly includes a movable seat with a guide needle and a soft needle seat with a soft needle. The movable seat is arranged away from the patch, and the soft needle seat is arranged close to the patch. The movable seat is fitted with the soft needle seat and the guide needle is axially inserted in the soft needle. The spring is pre-compressed and arranged between the movable seat and the knob; the knob releases the axial limit on the movable seat by circumferentially rotating relative to the movable seat.

[0008] Furthermore, the open end of the knob is composed of a plurality of extension units arranged at intervals along the circumferential direction, and the extension units are formed by axially extending at least one side wall of the knob; and the plurality of extension units are arranged opposite to each other in the lateral direction of the knob.

[0009] Furthermore, an axial limiting structure and an axial guiding structure are provided between the extension unit and the movable seat and / or the soft needle seat.

[0010] Furthermore, the axial limiting structure adopts the cooperation of the arc groove and the cylindrical pin; the axial guiding structure adopts the cooperation of the cylindrical pin and the guide groove or the guide edge.

[0011] Furthermore, the soft needle holder includes an outer shell, a needle holding body and a soft needle base. The soft needle is arranged at the central axis position of the soft needle base and arranged toward the patch. The soft needle base arranged away from the patch and the needle holding body arranged close to the patch are attached to each other and jointly clamped in the inner cavity of the outer shell. The guide needle carries the soft needle through the needle holding body and holds the soft needle through the needle holding body.

[0012] Furthermore, a reset pin is provided on the side wall surface of the movable seat.

[0013] Furthermore, the patch is provided with a puncture portion for the guide needle and the soft needle to puncture through after being unlocked; the sealing cover on the side of the puncture portion away from the guide needle is provided with a needle guard cover for protecting the guide needle and the soft needle and is opened before puncture to facilitate puncture; and / or the side of the puncture portion close to the guide needle is provided with a soft rubber block, and the soft rubber block has a needle accommodating cavity; and / or the surface of the patch on the side facing the guide needle is also provided with a positioning column for relative positioning between the guide needle and the puncture portion.

[0014] According to another aspect of the utility model, a patch-type insulin pump is also provided, which includes the above-mentioned soft needle implantation mechanism for the patch-type insulin pump.

[0015] The utility model has the following beneficial effects:

[0016] The utility model is used for a soft needle implantation mechanism of a patch-type insulin pump. The soft needle implantation mechanism is used to be arranged in the patch-type insulin pump and as a part of the patch-type insulin pump. The patch is attached to the bottom of the base plate of the patch-type insulin pump, which is used to be attached to the target position when in use and to seal and cover the puncture site of the patch-type insulin pump. The other parts of the soft needle implantation mechanism are fixedly installed on the outer cover of the patch-type insulin pump through a fixing seat, so that the puncture assembly is sealed inside the patch-type insulin pump, and the puncture part directly acting on the target position is protected to avoid secondary contamination, thereby ensuring the safety of the use of the patch-type insulin pump. The knob is rotated circumferentially to achieve relative rotation between the knob and the puncture assembly, and the axial limit of the puncture assembly is released, so that the pre-compressed spring releases the elastic pre-pressure to push the puncture assembly to move axially, and then the puncture is achieved, that is, the soft needle is implanted; the entire soft needle implantation process is simple to operate, and the entire implantation structure is also simple, and the soft needle implantation process can even be achieved with one hand.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic cross-sectional structure diagram of a soft needle implantation mechanism for a patch-type insulin pump according to a preferred embodiment of the utility model;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of a soft needle implantation mechanism for a patch-type insulin pump according to a preferred embodiment of the utility model;

[0021] Figure 3 This is a schematic structural diagram of the outer cover of a patch-type insulin pump according to a preferred embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the bottom plate of the patch-type insulin pump according to the preferred embodiment of the utility model.

[0023] Legend:

[0024] 100, patch; 101, needle cover; 102, soft rubber block; 103, positioning column; 200, fixing seat; 300, knob; 301, buckle part; 302, snap-on block; 303, extension unit; 3031, blocking member; 400, spring; 500, puncture assembly; 501, movable seat; 5011, reset pin; 502, guide needle; 503, soft needle seat; 5031, outer shell; 5032, needle holding body; 5033, soft needle base; 504, soft needle; 600, arc groove; 700, cylindrical pin; 800, guide groove or guide edge. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0026] Figure 1 It is a schematic cross-sectional structure diagram of a soft needle implantation mechanism for a patch-type insulin pump according to a preferred embodiment of the utility model; Figure 2 It is a three-dimensional structural schematic diagram of a soft needle implantation mechanism for a patch-type insulin pump according to a preferred embodiment of the utility model; Figure 3 This is a schematic structural diagram of the outer cover of a patch-type insulin pump according to a preferred embodiment of the utility model; Figure 4 It is a structural schematic diagram of the bottom plate of the patch-type insulin pump according to the preferred embodiment of the utility model.

[0027] like Figure 1 and Figure 2As shown, the soft needle implantation mechanism for the patch-type insulin pump of this embodiment includes a patch 100, a fixing seat 200, a knob 300, a spring 400, and a puncture assembly 500; the patch 100 is used to be installed at the bottom of the base plate of the patch-type insulin pump, the fixing seat 200 is used to be fixed on the outer cover of the patch-type insulin pump, and the patch 100 and the fixing seat 200 are arranged correspondingly; the control end of the knob 300 is used to be exposed outside the outer cover of the patch-type insulin pump for easy control operation, and the open end of the knob 300 faces the patch The puncture assembly 500 is arranged in the direction of 100, the knob 300 is axially positioned and circumferentially rotatable on the fixing seat 200; the puncture assembly 500 is axially limited and arranged in the opening of the knob 300 with the puncture portion facing the direction of the patch 100, and the spring 400 is arranged between the puncture assembly 500 and the knob 300 in a pre-compressed state; the knob 300 releases the axial limitation of the puncture assembly 500 by rotating relative to the puncture assembly 500, and then releases the elastic pre-pressure of the spring 400 to push the puncture assembly 500 to puncture. The utility model is used for a soft needle implantation mechanism of a patch-type insulin pump, which is used to be arranged in the patch-type insulin pump and serve as a part of the patch-type insulin pump. The patch 100 is attached to the bottom of the base plate of the patch-type insulin pump, and is used for being attached to the target position during use, and for sealing and covering the puncture site of the patch-type insulin pump. The other parts of the soft needle implantation mechanism are fixedly mounted on the outer cover of the patch-type insulin pump through the fixing seat 200, and the puncture assembly 500 is sealed inside the patch-type insulin pump, thereby protecting the puncture part directly acting on the target position to avoid secondary contamination, thereby ensuring the safe use of the patch-type insulin pump. By rotating the knob 300 circumferentially to achieve relative rotation between the knob 300 and the puncture assembly 500, the axial limit of the puncture assembly 500 is released, so that the pre-compressed spring 400 releases the elastic pre-pressure to push the puncture assembly 500 to move axially, thereby achieving puncture, that is, achieving soft needle implantation; the entire soft needle implantation process is simple to operate, and the entire implantation structure is also simple, and the soft needle implantation process can even be achieved with one hand. Optionally, as Figure 1 and Figure 2 The outer wall of the fixing seat 200 is provided with an annular fixing groove, and the fixing seat 200 is fixed to the fixing seat 200 through the annular fixing groove. Figure 3 The insulin pump is placed on the positioning hole of the outer cover to achieve fixation between them.

[0028] like Figure 1 and Figure 2As shown, in this embodiment, a buckle portion 301 arranged axially and with a free end facing the fixed seat 200 is provided on the side wall of the control end of the knob 300, and the free end of the buckle portion 301 extends radially to form a clamping block 302; the buckle portions 301 are arranged oppositely on both sides of the knob 300; the knob 300 is clamped to the inner side of the fixed seat 200 through the buckle portions 301, and the clamping block 302 is used to slide circumferentially and limit axially on the inner side of the fixed seat 200. Optionally, the buckle portions 301 are disconnected from the base of the knob 300 on both sides, so that the buckle portions 301 are elastically connected to the knob 300. Optionally, a circumferential groove matching the clamping block 302 is provided on the inner wall of the fixed seat 200. When the knob 300 is clamped to the fixed seat 200 through the buckle portion 301, the clamping block 302 is also slidably arranged in the circumferential groove, so as to achieve the purpose of the knob 300 rotating relative to the fixed seat 200. Optionally, the groove length of the circumferential groove matches the rotation stroke of the knob 300 relative to the fixed seat 200, so that the circumferential groove constitutes a limit for the rotation of the knob 300 relative to the fixed seat 200. Optionally, a ball is arranged between the knob 300 and the fixed seat 200, so that the knob 300, the ball and the fixed seat 200 form a bearing mechanism.

[0029] like Figure 1 and Figure 2 As shown, in this embodiment, the puncture assembly 500 includes a movable seat 501 with a guide needle 502 and a soft needle seat 503 with a soft needle 504, the movable seat 501 is arranged away from the patch 100, the soft needle seat 503 is arranged close to the patch 100, the movable seat 501 fits with the soft needle seat 503 and the guide needle 502 is axially inserted in the soft needle 504, and the spring 400 is pre-compressed and arranged between the movable seat 501 and the knob 300; the knob 300 releases the axial limit of the movable seat 501 by circumferential rotation relative to the movable seat 501. Optionally, the movable seat 501 is axially inserted in the fixed seat 200 and the knob 300, and the movable seat 501 is circumferentially limited relative to the fixed seat 200, and the movable seat 501 is circumferentially free relative to the knob 300. Optionally, the movable seat 501 and the fixed seat 200 are connected and matched by an axial slider and an axial slide groove. Optionally, the movable seat 501 is connected to the fixed seat 200 by a spline. Optionally, the movable seat 501 and the fixed seat 200 are connected by end-face bonding and end-face concave-convex matching, so that the movable seat 501 is limited in the circumferential direction by the fixed seat 200; at the same time, after unlocking, the movable seat 501 can be quickly separated from the fixed seat 200, thereby reducing the obstruction or restriction to the puncture action, thereby ensuring smooth puncture.

[0030] like Figure 1 and Figure 2As shown, in this embodiment, the open end of the knob 300 is composed of a plurality of extension units 303 arranged at intervals along the circumferential direction, and the extension units 303 are formed by at least one side wall of the knob 300 extending along the axial direction; the plurality of extension units 303 are arranged opposite to each other in the lateral direction of the knob 300. The open end of the knob 300 is composed of a plurality of extension units 303 arranged at intervals along the circumferential direction, which is different from the annular open end, has a higher degree of freedom, less obstruction and restriction to the puncture action, and can ensure the smooth progress of the puncture action. The plurality of extension units 303 are arranged opposite to each other in the lateral direction of the knob 300 in pairs, so as to facilitate mechanical balance, thereby facilitating the realization of locking and puncture. Optionally, a blocking member 3031 is further provided at the free end of the extension unit 303. The blocking member 3031 is arranged on the puncture movement path of the puncture assembly 500, and is used to limit the puncture stroke of the puncture assembly 500 after the puncture assembly 500 is unlocked, so as to avoid excessive puncture force causing damage to the user; in addition, by arranging the blocking member 3031, the elastic pre-pressure of the spring 400 can also be increased to increase the puncture speed, which can correspondingly reduce the pain during puncture, thereby improving the user's comfort.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, an axial limiting structure and an axial guiding structure are provided between the extension unit 303 and the movable seat 501 and / or the soft needle seat 503. Optionally, the axial limiting structure and the axial guiding structure are arranged in association. The axial limiting structure is used to achieve axial limiting of the movable seat 501 and / or the soft needle seat 503, so as to achieve locking of the puncture assembly 500; by turning the knob 300 to achieve switching from the axial limiting structure to the axial guiding structure, the puncture assembly 500 is unlocked and the elastic pre-pressure of the spring 400 is released, so that the puncture assembly 500 is subjected to the elastic pre-pressure of the spring 400 to achieve puncture action, thereby achieving soft needle implantation.

[0032] like Figure 1 and Figure 2As shown, in this embodiment, the axial limiting structure adopts the cooperation of the arc groove 600 and the cylindrical pin 700; the axial guiding structure adopts the cooperation of the cylindrical pin 700 and the guide groove or guide edge 800. Optionally, the cylindrical pin 700 is arranged on the movable seat 501 and / or the soft needle seat 503, and the arc groove 600 is opened in the extension unit 303. The center of gravity of the movable seat 501 and / or the soft needle seat 503 falls into the arc groove 600 through the cylindrical pin 700, thereby realizing the axial limiting and locking of the movable seat 501 and / or the soft needle seat 503 by the extension unit 303; accordingly, the guide groove or guide edge 800 is arranged on the extension unit 303. 3, and the guide groove or guide edge 800 is connected with the arc groove 600; when the knob 300 is rotated, the arc groove 600 rotates relative to the cylindrical pin 700, so that the cylindrical pin 700 escapes from the arc groove 600 and falls into the guide groove or guide edge 800, and then the movable seat 501 is released by the elastic pre-pressure of the spring 400 to push the movable seat 501 and the soft needle seat 503, so that the guide needle 502 carries the soft needle 504 for puncture. Optionally, the cylindrical pin 700 is arranged on the extension unit 303, the arc groove 600 and the guide groove or guide edge 800 are connectedly arranged on the movable seat 501 and / or the soft needle seat 503, and the arc groove 600 is not arranged in the fitting area between the movable seat 501 and the soft needle seat 503, and the center of gravity of the movable seat 501 and / or the soft needle seat 503 is overlapped on the cylindrical pin 700 via the arc groove 600; when the knob 300 is rotated, the arc groove 600 rotates relative to the cylindrical pin 700 so that the cylindrical pin 700 escapes from the arc groove 600 and falls into the guide groove or guide edge 800, and then the movable seat 501 is subjected to the elastic pre-pressure released by the spring 400 to push the movable seat 501 and the soft needle seat 503, thereby realizing puncture by the guide needle 502 carrying the soft needle 504.

[0033] like Figure 1 and Figure 2As shown, in this embodiment, the soft needle seat 503 includes an outer shell 5031, a needle holding body 5032 and a soft needle base 5033. The soft needle 504 is arranged at the central axis position of the soft needle base 5033 and arranged toward the patch 100. The soft needle base 5033 arranged away from the patch 100 and the needle holding body 5032 arranged close to the patch 100 are attached to each other and are jointly fixed in the inner cavity of the outer shell 5031. The guide needle 502 carries the soft needle 504 and passes through the needle holding body 5032 to hold the soft needle 504. The soft needle seat 503 includes an outer shell 5031, a needle holding body 5032 and a soft needle base 5033. The soft needle 504 is arranged at the central axis of the soft needle base 5033 and arranged toward the patch 100. The soft needle base 5033 arranged away from the patch 100 and the needle holding body 5032 arranged close to the patch 100 are attached to each other and are jointly fixed in the inner cavity of the outer shell 5031. The guide needle 502 carries the soft needle 504 and passes through the needle holding body 5032 and holds the soft needle 504 through the needle holding body 5032. Optionally, the soft needle seat 503 adopts an elastic base, which can facilitate the puncture of the guide needle 502, the elastic holding of the guide needle 502 and / or the soft needle 504, and the sealing when the guide needle 502 is withdrawn. More specifically, the guide needle 502 passes through the soft needle base 5033 and is inserted into the soft needle 504. The guide needle 502 and the soft needle 504 pass through the needle body 5032 together, and the soft needle 504 is clamped by the needle body 5032. When the knob 300 is rotated to unlock, under the action of elastic pre-pressure, the movable seat 501 pushes the soft needle seat 503 to move rapidly to the target position, thereby causing the guide needle 502 and the soft needle 504 to pierce into the target position, and then the guide needle 502 is reset along with the movable seat 501 (this reset process can be achieved manually), and the soft needle 504 is retained in the target position under the clamping action of the needle body 5032. A conical cavity is provided at one end of the needle holding body 5032 facing the soft needle base 5033. After the guide needle 502 carries the soft needle 504 through the conical cavity and the needle holding body 5032, the soft needle 504 is tightly held by the needle holding body 5032. The radial holding force of the needle holding body 5032 and the oblique supporting force of the conical cavity are used together to prevent the soft needle 504 from falling out, thereby achieving the purpose of withdrawing the guide needle 502 and retaining the soft needle 504.

[0034] like Figure 1 and Figure 2As shown, in this embodiment, a reset pin 5011 is further provided on the side wall surface of the movable seat 501. From one aspect, when the knob 300 rotates relative to the movable seat 501, the reset pin 5011 can be used to limit the relative rotation of the knob 300 and the movable seat 501, ensuring that the puncture assembly 500 can accurately switch from the axial limit state to the contact axial limit state without generating additional movement paths or obstacles, ensuring that the puncture action is carried out smoothly. From another aspect, the reset pin 5011 can be used to reset the movable seat 501 (reset to the axial limit state), thereby allowing the guide needle 502 to smoothly escape from the soft needle 504. Optionally, the reset pin 5011 can also serve as a reset operating part for resetting the movable seat 501. The user can manually control the reset pin 5011 to achieve reset; or the reset pin 5011 can be used to trigger the position switch, thereby driving the reset motor to push the reset pin 5011 to reset. Since the reset may require action in both axial and circumferential directions, multiple sets of reset motors can be set (linear motors, rotary motors, etc. can be used, and the fixed part and the power output part can be connected to each other to achieve multiple sets of actions) to achieve different actions respectively; or the reset pin 5011 can be used to trigger the position switch, thereby driving the reset cylinder or reset oil cylinder to push the reset pin 5011 to reset. Since the reset may require action in both axial and circumferential directions, multiple sets of reset cylinders or reset oil cylinders can be set (linear cylinders or linear oil cylinders, rotary cylinders or rotary oil cylinders, etc. can be used, and the fixed part and the power output part can be connected to each other to achieve multiple sets of actions) to achieve different actions respectively.

[0035] like Figure 1 and Figure 2As shown, in this embodiment, the patch 100 is provided with a puncture portion for the guide needle 502 carrying the soft needle 504 to puncture through after being unlocked; the sealing cover on the side of the puncture portion away from the guide needle 502 is provided with a needle guard cover 101 for protecting the guide needle 502 and the soft needle 504 and opening before puncture to facilitate puncture; when the patch-type insulin pump is used, the needle guard cover 101 is first opened, and the release paper on the surface of the patch 100 is torn off, and then the patch 100 is pasted to the target position, and then the subsequent steps are carried out. A soft rubber block 102 is provided on one side of the puncture portion close to the guide needle 502, and the soft rubber block 102 has a needle-accommodating cavity; the guide needle 502 is suspended in the needle-accommodating cavity of the soft rubber block 102 to prevent the guide needle 502 from being in contact with the soft rubber block 102 for a long time and causing the soft rubber block 102 to enter the inner cavity of the guide needle 502, thereby ensuring the safety of the guide needle 502 during puncture; when the movable seat 501 pushes the soft needle seat 503 to perform a puncture action through the elastic pre-pressure released by the spring 400, the soft needle seat 503 is punched onto the soft rubber block 102 and the soft rubber block 102 is filled into the inner cavity gap of the soft needle seat 503, so as to achieve a stable connection between the soft needle seat 503 and the patch 100 and a seal in the surrounding area. The surface of the patch 100 facing the guide needle 502 is also provided with a positioning column 103 for relative positioning between the guide needle 502 and the puncture portion; since the patch 100 and the guide needle 502 are respectively arranged at the bottom of the bottom plate of the patch-type insulin pump and in the inner cavity of the patch-type insulin pump, Figure 1 and Figure 2 The positioning column 103 shown is inserted into Figure 4 The bottom plate hole shown in the figure ensures that the patch 100 and the guide needle 502 are positioned precisely correspondingly, and more specifically, the puncture portion and the guide needle 502 are positioned precisely correspondingly.

[0036] The patch-type insulin pump of this embodiment includes the above-mentioned soft needle implantation mechanism for the patch-type insulin pump.

[0037] Matters not covered in this utility model are known technologies.

[0038] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.

[0040] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A soft needle implantation mechanism for a patch-type insulin pump, characterized in that: It comprises a patch (100), a fixing seat (200), a knob (300), a spring (400), and a puncture assembly (500); The patch (100) is used to be installed on the bottom of the base plate of the patch-type insulin pump, and the fixing seat (200) is used to be fixed on the outer cover of the patch-type insulin pump, and the patch (100) and the fixing seat (200) are arranged correspondingly; The control end of the knob (300) is used to be exposed outside the outer cover of the patch-type insulin pump to facilitate control operations, the open end of the knob (300) is arranged toward the patch (100), and the knob (300) is axially positioned and circumferentially rotatably arranged on the fixing seat (200); The puncture assembly (500) is arranged in an axially limited manner in the opening of the knob (300) and the puncture portion is arranged in a direction toward the patch (100), and the spring (400) is arranged in a pre-compressed state between the puncture assembly (500) and the knob (300); The knob (300) releases the axial limit of the puncture assembly (500) by rotating relative to the puncture assembly (500), and then releases the elastic pre-pressure through the spring (400) to push the puncture assembly (500) to puncture.

2. The soft needle implantation mechanism for a patch-type insulin pump according to claim 1, characterized in that: A buckle portion (301) is arranged axially on the side wall of the control end of the knob (300) and its free end faces the fixing seat (200). The free end of the buckle portion (301) extends radially to form a clamping block (302). The buckle parts (301) are arranged opposite to each other on two sides of the knob (300); The knob (300) is clamped on the inner side of the fixing seat (200) via the clamping portion (301), and is circumferentially slid and axially limited on the inner side of the fixing seat (200) by means of the clamping block (302).

3. The soft needle implantation mechanism for a patch-type insulin pump according to claim 1, characterized in that: The puncture assembly (500) comprises a movable seat (501) with a guide needle (502) and a soft needle seat (503) with a soft needle (504); the movable seat (501) is arranged away from the patch (100), and the soft needle seat (503) is arranged close to the patch (100); the movable seat (501) and the soft needle seat (503) are fitted together, and the guide needle (502) is axially inserted into the soft needle (504); and the spring (400) is arranged in a pre-compressed state between the movable seat (501) and the knob (300); The knob (300) releases the axial limit on the movable seat (501) by circumferentially rotating relative to the movable seat (501).

4. The soft needle implantation mechanism for a patch-type insulin pump according to claim 3, characterized in that: The open end of the knob (300) is composed of a plurality of extension units (303) arranged at intervals along the circumferential direction, and the extension unit (303) is formed by extending at least one side wall of the knob (300) along the axial direction; The plurality of extension units (303) are arranged in pairs opposite to each other in the lateral direction of the knob (300).

5. The soft needle implantation mechanism for a patch-type insulin pump according to claim 4, characterized in that: An axial limiting structure and an axial guiding structure are provided between the extension unit (303) and the movable seat (501) and / or the soft needle seat (503).

6. The soft needle implantation mechanism for a patch-type insulin pump according to claim 5, characterized in that: The axial limiting structure adopts the cooperation of the arc groove (600) and the cylindrical pin (700); The axial guide structure adopts a cylindrical pin (700) matched with a guide groove or a guide edge (800).

7. The soft needle implantation mechanism for a patch-type insulin pump according to any one of claims 3 to 6, characterized in that: The soft needle seat (503) comprises an outer shell (5031), a needle holding body (5032) and a soft needle base (5033). The soft needle (504) is arranged at the central axis of the soft needle base (5033) and is arranged toward the patch (100). The soft needle base (5033) arranged far from the patch (100) and the needle holding body (5032) arranged close to the patch (100) are attached to each other and are fixed together in the inner cavity of the outer shell (5031). The guide needle (502) carries the soft needle (504) and is arranged through the needle holding body (5032) and holds the soft needle (504) through the needle holding body (5032).

8. The soft needle implantation mechanism for a patch-type insulin pump according to any one of claims 3 to 6, characterized in that: A reset pin (5011) is also provided on the side wall surface of the movable seat (501).

9. The soft needle implantation mechanism for a patch-type insulin pump according to any one of claims 3 to 6, characterized in that: The patch (100) is provided with a puncture portion for the guide needle (502) to carry the soft needle (504) to puncture through after being unlocked; The sealing cover on the side of the puncture portion away from the guide needle (502) is used to protect the guide needle (502) and the soft needle (504) and is opened before puncture to facilitate puncture; and / or A soft rubber block (102) is provided on one side of the puncture portion close to the guide needle (502), and the soft rubber block (102) has a needle-accommodating cavity; and / or A positioning column (103) for relative positioning between the guide needle (502) and the puncture portion is also provided on the surface of the patch (100) on one side facing the guide needle (502).

10. A patch-type insulin pump, characterized in that: A soft needle implantation mechanism for a patch-type insulin pump comprising any one of claims 1 to 9.

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