Sensor needle assisting device capable of preventing mistaken touch

Abstract

The invention provides a mistaken touch prevention sensor needle assisting device. The mistaken touch prevention sensor needle assisting device comprises a first state of a locking position and a second state of an implanting position. The needle assisting device comprises a shell, a middle cylinder, a needle holder, an emitter base, a trigger sliding block and a base which are sequentially assembled from top to bottom, the emitter is embedded in the emitter base, and the base and the shell are rotationally assembled; the middle cylinder comprises an upper portion and a lower portion, the upper portion is sleeved with a first spring, a needle withdrawing bin is arranged in the upper portion, and a trigger mechanism is arranged on the lower portion. The shell, the middle cylinder, the needle holder, the emitter base, the trigger sliding block and the base are sequentially assembled through the buckling positions, the working procedures are reduced, large-scale production is facilitated, the emitting stroke of the emitter base and the elastic force of the spring are designed according to the length of the sensor and the length of the guiding puncture needle, and therefore the implantation success rate is increased.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a sensor needle aid capable of preventing accidental touch. Background Art

[0002] Implantable biosensors have the advantage of continuously measuring certain important physiological or pathological parameters in the body that change over time, such as the concentration of oxygen, glucose, and lactate, so as to obtain comprehensive and accurate diagnosis or treatment effects. Continuous monitoring of human physiological parameters is of great reference significance for diet, health, medication, exercise status, etc. In vitro blood glucose self-monitoring is a typical example, but because it requires continuous finger pricking to obtain discontinuous test values, and the user needs to remember the test values, the monitoring effect is greatly reduced. Continuous blood glucose monitoring uses an implanted blood glucose sensor to monitor blood glucose signals, and then the data can be sent to the receiving device through a transmitter to achieve all-weather uninterrupted and visual blood glucose monitoring. Similarly, physiological parameters such as lactate and uric acid can also be monitored by this method.

[0003] In order to wear this type of continuous monitoring device, a needle aid is also needed. Generally speaking, the guide puncture needle is put on the front end of the sensor, and when the needle aid is started, the guide puncture needle and the sensor enter the implantation site synchronously, and then the guide puncture needle is quickly withdrawn, leaving the sensor in the subcutaneous tissue. Whether the needle aid can work stably and reliably in this process is related to the success of the sensor implantation and the user experience. At the same time, most of the needle aids on the market have an exposed switch structure, which often causes accidental touches of the switch. Therefore, it is urgent to develop an anti-accidental touch needle aid with a high implantation success rate. Summary of the invention

[0004] The present invention provides a sensor needle aid that prevents accidental touch. The shell, middle tube, needle holder, transmitter base, trigger slider and base are assembled in sequence through buckling, which reduces the working procedures and is conducive to large-scale production. The launching stroke and spring force of the transmitter base are designed according to the length of the sensor and the guide puncture needle, thereby improving the implantation success rate.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A sensor needle-assisting device for preventing accidental touch, comprising at least a transmitter embedded with a sensor, the transmitter being provided with a guide puncture needle, the needle-assisting device comprising a first state of a locked position and a second state of an implanted position; the needle-assisting device comprises a shell, a middle cylinder, a needle holder, a transmitter base, a trigger slider and a base which are assembled in sequence from top to bottom, the transmitter being embedded in the transmitter base, and the base and the shell being rotatably assembled; the middle cylinder comprising an upper part and a lower part, the upper part being provided with a first spring on an outer sleeve, a needle withdrawal bin being provided in the inner sleeve, the needle withdrawal bin being provided with a second spring on an outer sleeve, and a trigger mechanism being provided at the lower part; the transmitter base is located in the middle cylinder, a gripper is provided on the top of the transmitter base, a needle holder is installed in the gripper, and the trigger slider is located in the transmitter base; the shell can move up and down along the outer side of the middle cylinder, the transmitter base can move up and down along the inner side of the middle cylinder, and the trigger mechanism and the trigger slider cooperate with each other to complete the conversion of the first state and the second state of the needle-assisting device.

[0007] Furthermore, when the needle assistor is in the first state, the shell is assembled with the base, and the needle holder and the transmitter base are both at the end away from the skin; when the needle assistor is in the second state, the trigger mechanism causes the transmitter base to drive the transmitter to move downward to complete the implantation of the sensor.

[0008] Furthermore, the side wall of the shell is provided with a shell guide buckle, a slider block and a shell limiting rib, and the inner side of the top of the shell is provided with a first spring guide block.

[0009] Preferably, the upper part of the middle cylinder is provided with a middle cylinder through hole corresponding to the first spring guide block, the gap between the needle withdrawal bin and the upper part is the second spring slot, the lower side of the middle cylinder is provided with a transmitter base buckle and a middle cylinder guide groove matching the shell limiting rib, and the lower inner wall is provided with a middle cylinder limiting rib.

[0010] Preferably, the trigger mechanism includes a slider guide groove and a locking groove matching the housing guide buckle.

[0011] Preferably, a sensor through hole is provided in the central overlapping area of ​​the middle tube, the needle holder and the transmitter base.

[0012] Preferably, the transmitter base is further provided with a trigger slider fixing position on the side, the inside of the trigger slider fixing position is a stepped groove, and the transmitter base is further provided with a transmitter clamping position and a transmitter base guide groove matching the middle tube limiting rib on the side.

[0013] Furthermore, a third spring is provided inside the trigger slider.

[0014] Furthermore, the distance between the transmitter base snap-in position and the transmitter base snap-in is longer than the length of the portion of the guide puncture needle exposed from the transmitter, and the range of the longer length is 10-15 mm.

[0015] Furthermore, the base and the housing are rotatably assembled, and a magnet corresponding to the position of the sensor circuit board is also provided on the base. A medical sealing packaging material is also provided on the base, and specifically, the medical sealing packaging material is Tyvek.

[0016] The present invention has the following beneficial effects:

[0017] 1. The needle assisting device of the present invention is specially designed with the launch stroke and spring force of the launcher base according to the length of the sensor and the guide puncture needle, so as to ensure that the sensor can be smoothly implanted under the skin and improve the implantation success rate.

[0018] 2. The present invention assembles the housing, the middle tube, the needle holder, the transmitter base, the trigger slider and the base in sequence by snapping, thereby reducing the number of working steps and facilitating large-scale production.

[0019] 3. The needle assist device provided by the present invention has a simple structure, has no buttons, and does not require a mechanism to prevent accidental triggering.

[0020] 4. The needle assisting device and the sensor of the present invention adopt an integrated design. After unscrewing the base, it can be directly implanted without disassembly or assembly.

[0021] 5. The outer side of the base of the present invention is heat-sealed with Tyvek, and after the base and the shell are rotated, assembled and sealed, the transmitter and the sensor can be sterilized as a whole.

[0022] 6. The base of the present invention is also provided with a magnet, which, after being screwed, faces the magnetic control element on the circuit board, and can cut off the power supply of the circuit in the unopened state, thereby extending the shelf life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The overall structure of the needle aid provided by the present invention is shown in FIG. Figure 1 ;

[0024] Figure 2 An exploded schematic diagram of the needle assisting device provided by the present invention;

[0025] Figure 3 A schematic diagram of the internal structure of the needle assisting device provided by the present invention;

[0026] Figure 4 A schematic diagram of the structure of the housing provided by the present invention;

[0027] Figure 5 The structure of the middle tube provided by the present invention is schematically shown Figure 1 ;

[0028] Figure 6 The structure of the middle tube provided by the present invention is schematically shown Figure 2 ;

[0029] Figure 7A schematic diagram of the structure of the needle holder provided by the present invention;

[0030] Figure 8 The structure of the transmitter base provided by the present invention is shown in FIG. Figure 1 ;

[0031] Fig. 9 The structure of the transmitter base provided by the present invention is shown in FIG. Figure 2 ;

[0032] Fig.10 A schematic diagram of the structure of the trigger slider provided by the present invention;

[0033] Fig.11 A schematic diagram of the structure of the base provided by the present invention;

[0034] Fig.12 is a cross-sectional view of the needle assisting device in a first state;

[0035] Fig.13 is a cross-sectional view of the needle assisting device in a second state;

[0036] In the figure: 1-housing, 101-slider block, 102-housing limit rib, 103-housing guide buckle, 104-first spring guide block,

[0037] 2-middle tube, 201-trigger mechanism, 202-locking groove, 203-launcher base buckle, 204-slider guide groove, 205-middle tube guide groove, 206-retaining edge, 207-middle tube through hole, 208-middle tube limiting rib, 209-second spring slot, 210-needle withdrawal chamber, 211-perforation, 212-first spring

[0038] 3-needle holder, 301-needle holder clamp, 302-guide puncture needle slot,

[0039] 4-launcher base, 401-claw, 402-launcher base guide groove, 403-launcher base clamping position, 404-trigger slider fixing position, 405-launcher buckle, 406-second spring, 5-trigger slider,

[0040] 6-base, 601-magnet position,

[0041] 7-transmitter, 8-guide puncture needle, 9-sensor through hole, 10-transmitting stroke of the transmitter base. DETAILED DESCRIPTION

[0042] In order to describe the present invention more specifically, the technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. These descriptions are only to show how the present invention is implemented and cannot limit the specific scope of the present invention. The scope of the present invention is defined in the claims.

[0043] like Figures 1 to 3 As shown, this embodiment provides a sensor needle-assisting device for preventing accidental touch, which at least includes a transmitter, on which a guide puncture needle is provided, and the needle-assisting device includes a first state of a locked position and a second state of an implanted position; the needle-assisting device includes a shell, a middle tube, a needle holder, a transmitter base, a trigger slider and a base assembled from top to bottom, the transmitter is embedded in the transmitter base, the base and the shell are assembled by screw rotation, the needle-assisting device and the sensor are integrated, and after unscrewing the base, it can be directly implanted without disassembly or assembly;

[0044] like Figure 4 As shown, the top of the housing is provided with a first spring guide block inwardly, the first spring guide block is an arc-shaped protruding structure, the inner side wall of the housing is provided with a housing guide buckle, a slider block and a housing limiting rib, the housing limiting rib is a long strip structure, and the housing guide buckle is located on both sides of the slider block;

[0045] like Figure 5-6 As shown, the middle cylinder includes an upper part and a lower part, the upper outer shell is provided with a first spring, the upper part is provided with a needle withdrawal bin, the needle withdrawal bin outer shell is provided with a second spring, the gap between the needle withdrawal bin and the upper part is a second spring slot for installing the second spring, the top of the upper part is provided with a middle cylinder through hole matching the first spring guide block, the first spring guide block can pass through the middle cylinder through hole to press down the first spring, the bottom end of the lower part is provided with a retaining edge, the retaining edge improves the stability of the needle aid when it contacts the skin, the outer side of the lower part is provided with a middle cylinder guide groove matching the shell limiting rib, the shell can move up and down along the middle cylinder guide groove through the shell limiting rib under the action of external force, during the movement, the first spring guide block compresses the first spring, and the lower side is also provided with an elastic launch The transmitter base buckle, the hook surface on the buckle faces the inner side of the middle tube, the transmitter base can be installed in the middle tube by pressing and then engaging with the transmitter base buckle, a through hole is provided on the top of the middle tube for engaging and assembling with the transmitter base, the trigger slider fixing position can be located in the through hole, a trigger mechanism 201 is also provided on the side of the middle tube, the trigger mechanism is located below the through hole, a slider guide groove is provided in the middle of the trigger mechanism, the trigger slider can move up and down in the slider guide groove, the slider guide groove protrudes toward the inner wall of the middle tube, so as to facilitate the release of the limit of the trigger slider, a locking groove is provided on the side of the slider guide groove, the locking groove is located on the outer wall of the middle tube, the locking groove is engaged with the shell guide buckle, and the shell guide buckle can move up and down in the locking groove; a middle tube limiting rib is also provided on the lower inner wall;

[0046] like Figure 8-9As shown, the transmitter base is located in the middle cylinder, and a claw is provided on the top of the transmitter base, and a needle holder is embedded in the claw. The inward surface of the claw is an inclined surface, which is convenient for assembly with the needle holder. A transmitter base guide groove matching the middle cylinder limiting rib is provided on the side of the transmitter base, and the middle cylinder can move up and down along the transmitter base guide groove through the middle cylinder limiting rib. A transmitter base clamping position matching the transmitter base buckle is also provided on the side of the transmitter base. Correspondingly, a transmitter buckle is also provided in the transmitter base, and the transmitter base is assembled with the middle cylinder buckle through the transmitter base buckle, and the transmitter is installed with the transmitter base buckle through the transmitter buckle, and trigger slider fixing positions are also provided on both sides of the transmitter base, and the trigger slider fixing positions are stepped grooves, such as Fig.10 As shown, the cylindrical tail end of the trigger slider is placed in the trigger slider fixing position, the trigger slider head end is provided with an inclined surface, the inclined surface structure facilitates the trigger slider to release the limit, a third spring (not shown in the figure) is provided in the trigger slider, and the trigger slider is installed at the trigger slider fixing position 404 by undercutting;

[0047] like Figure 7 As shown, the needle holder is located in the gripper, a needle holder clamp is provided on the top surface of the needle holder, the needle holder clamp is fitted with the inclined surface of the gripper, a guide puncture needle groove is provided inside the needle holder, and a sensor through hole is provided in the central overlapping area of ​​the middle tube, the needle holder and the transmitter base;

[0048] like Fig.11 As shown, the base is provided with an empty groove for storing the guide puncture needle corresponding to the sensor through hole, and Tyvek is heat-sealed on the outside of the base. After the base and the shell are rotated, assembled and sealed, the transmitter and the sensor can be sterilized as a whole, and a magnet position for installing a magnet is provided on the adjacent side of the empty groove. When the base and the shell are tightened, the magnet corresponds to the position of the magnetic control element on the circuit board, which can realize the power-off of the circuit in the unopened state, thereby extending the shelf life.

[0049] In addition, the needle assisting device of the present invention designs the launching stroke and spring force of the launcher base according to the length of the sensor and the guide needle for guiding the puncture needle. Specifically, Figure 3As shown, the launch stroke of the transmitter base (i.e., the distance from the transmitter base snap-in to the transmitter base snap-in) is longer than the length of the guide puncture needle exposed from the transmitter. This is because the guide puncture needle and the sensor need to enter the implantation site synchronously, and then the guide puncture needle is quickly withdrawn, and the sensor is implanted in the subcutaneous tissue, which makes it very important for the guide puncture needle and the sensor to remain relatively stable during the implantation process. Therefore, in order to ensure relative stability, the length of the sensor exposed from the transmitter is shortened, and the length of the guide puncture needle exposed from the transmitter is also shortened accordingly, and the guide puncture needle is confined to the through hole in the middle of the transmitter, which improves relative stability. Furthermore, the launch stroke of the transmitter base is longer than the length of the guide puncture needle exposed from the transmitter, and the length range of longer than is 10-15mm. At this time, the elastic force of the launch spring is between 10-15N, which can ensure that the implantation is smooth and the impact force during implantation is not too large.

[0050] like Fig.12 As shown, when the needle assisting device is in the first state of the locked position before being unsealed, the housing and the base are screwed and fixed, the needle holder is engaged in the claw, the claw is located in the needle withdrawal bin, the trigger slider extends from the trigger slider fixed position, and is limited by the slider stopper;

[0051] like Fig.13 As shown, when the needle assist device is in the second state of the implantation position, the base is separated from the housing, the needle holder is retracted into the needle retraction bin, the transmitter base with the sensor contacts the skin, and the trigger slider is retracted to the trigger slider fixed position. Sensor implantation operation process:

[0052] When in use, first the base is rotated and removed, at which point the transmitter is fixed in the transmitter buckle 405, and the sensor and the guide puncture needle are located in the transmitter.

[0053] Place the needle aid on the skin to be implanted, so that the retaining edge 206 touches the skin lightly, and press the shell 1 hard until the retaining edge 206 touches the edge of the shell. At this time, the trigger mechanism 201 lifts and compresses the trigger slider 5, and the trigger slider 5 disengages from the slider block 101. The compressed first spring releases energy, pushes the transmitter base 4 from the far end, drives the transmitter 6 to move toward the proximal end along the middle tube limiting rib 208, and the trigger slider 5 moves toward the proximal end along the slider guide groove 204 until the guide puncture needle implants the sensor into the skin, and the transmitter is close to the skin. At this time, the transmitter base is supported by the first spring at the transmitter base clamping position 203 of the middle tube, and the gripper 401 leaves the needle withdrawal bin 210, so that it no longer restricts the needle holder 3. Under the action of the second spring, the needle holder 3 brings the guide puncture needle into the needle withdrawal bin together, thereby completing the needle withdrawal.

[0054] After successful implantation, when the needle aid is removed, the adhesive tape tightly adheres the transmitter to the skin surface, and the transmitter is disengaged from the transmitter buckle 405; at the same time, the middle tube 2 moves further toward the proximal end under the action of the first spring, and the locking groove is hung on the shell guide buckle 102.

[0055] The various components of the needle aid provided by the present invention cooperate with each other, gradually move up and down, and finally implant the sensor subcutaneously. The structure is simple, there is no button, and there is no need to set up a mechanism to prevent false triggering. In order to improve the success rate of implantation, the launch stroke and spring elasticity of the transmitter base are specially designed according to the length of the sensor and the guide puncture needle, so as to ensure that the sensor can be smoothly implanted subcutaneously. In addition, the outer side of the base is heat-sealed with Tyvek. After the base and the shell are rotated, assembled and sealed, the transmitter and the sensor can be sterilized as a whole. There is also a magnet on the base. After tightening, it faces the magnetic control element on the circuit board, which can realize the circuit power-off in the unopened state, thereby extending the shelf life.

[0056] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A sensor needle-assisting device for preventing accidental touch, comprising at least a transmitter embedded with a sensor, wherein a guide puncture needle is arranged on the transmitter, characterized in that: The needle assisting device includes a first state of a locked position and a second state of an implanted position; the needle assisting device includes a shell, a middle cylinder, a needle holder, a transmitter base, a trigger slider and a base which are assembled in sequence from top to bottom, and the transmitter is embedded in the transmitter base; the middle cylinder includes an upper part and a lower part, the upper part is provided with a first spring, the upper part is provided with a needle withdrawal bin, the needle withdrawal bin is provided with a second spring, and the lower part is provided with a trigger mechanism; the transmitter base is located in the middle cylinder, a gripper is provided on the top of the transmitter base, a needle holder is installed in the gripper, and the trigger slider is located in the transmitter base; the shell can move up and down along the outer side of the middle cylinder, the transmitter base can move up and down along the inner side of the middle cylinder, and the trigger mechanism and the trigger slider cooperate with each other to complete the conversion of the first state and the second state of the needle assisting device.

2. The needle assisting device according to claim 1, characterized in that: When the needle assist device is in the first state, the shell is assembled with the base, and the needle holder and the transmitter base are both at the end away from the skin; when the needle assist device is in the second state, the trigger mechanism causes the transmitter base to drive the transmitter to move downward to complete the implantation of the sensor.

3. The needle assisting device according to claim 1, characterized in that: The side wall of the shell is provided with a shell guide buckle, a slider block and a shell limiting rib, and the inner side of the top of the shell is provided with a first spring guide block.

4. The needle assisting device according to claim 3, characterized in that: The upper part of the middle cylinder is provided with a middle cylinder through hole corresponding to the first spring guide block, the gap between the needle withdrawal bin and the upper part is the second spring slot, the lower side of the middle cylinder is provided with a transmitter base buckle and a middle cylinder guide groove matching the shell limiting rib, and the lower inner wall is provided with a middle cylinder limiting rib.

5. The needle assisting device according to claim 4, characterized in that: The trigger mechanism comprises a slide block guide groove and a locking groove matched with the shell guide buckle.

6. The needle assisting device according to claim 5, characterized in that: A sensor through hole is provided in the central overlapping area of ​​the middle tube, the needle holder and the transmitter base.

7. The needle assisting device according to claim 6, characterized in that: The side of the transmitter base is also provided with a trigger slider fixing position, the inside of the trigger slider fixing position is a stepped groove, and the side of the transmitter base is also provided with a transmitter clamping position and a transmitter base guide groove matching the middle tube limiting rib.

8. The needle assisting device according to claim 1, characterized in that: A third spring is arranged inside the trigger slider.

9. The needle assisting device according to claim 1, characterized in that: The distance between the transmitter base snap-in position and the transmitter base snap-in is longer than the length of the portion of the guide puncture needle exposed from the transmitter, and the range of the longer length is 10-15 mm.

10. The needle assisting device according to claim 1, characterized in that: The base and the shell are rotatably assembled, and a magnet corresponding to the position of the sensor circuit board is also arranged on the base.

Images