Needle assisting device

Abstract

The invention relates to the technical field of medical instruments, in particular to a needle assisting device which comprises a body, a sleeve body and a cover body, the body is provided with a containing cavity, the sleeve body is located in the containing cavity, a second protruding part of the sleeve body abuts against a first protruding part of the body in the first direction to limit the sleeve body to be disengaged from the containing cavity, and the cover body is detachably connected with the body at an opening of the containing cavity. The cover body is provided with a first limiting part, a first locking structure is arranged between the body and the sleeve body, when the cover body is connected with the body, the first limiting part keeps locking of the first locking structure, the body and the sleeve body are relatively fixed in the first direction, and the needle assisting device can be prevented from being mistakenly triggered in the transportation process; in addition, unlocking of the first locking structure can be achieved by separating the cover body from the body, then triggering of the needle assisting device is achieved by applying external force, the step of additionally achieving unlocking of parts for locking the body and the sleeve body is not needed, the number of assembly steps of the needle assisting device is reduced, the assembly cost of the needle assisting device is reduced, and use and operation of the needle assisting device are facilitated.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a needle-assist device. Background Technology

[0002] To monitor whether a diabetic patient's glucose levels are within a safe range in real time, diabetic patients usually choose to wear an analytical monitoring device. When wearing an analytical monitoring device, an assisted needle is needed. The assisted needle guides the analytical monitoring device into the patient's body, allowing the analytical monitoring device to come into contact with the patient's body fluids.

[0003] However, in the existing needle assist device structure, in order to avoid the needle assist device being accidentally triggered during transportation, anti-triggering parts are usually added to the needle assist device. Patients need to remove the anti-triggering parts before using the needle assist device, which not only brings unnecessary operations to users, but also increases the assembly cost of the entire needle assist device. Summary of the Invention

[0004] This application provides a needle assist device to solve the technical problems of high assembly cost and inconvenient operation of existing needle assist devices.

[0005] According to one aspect of this application, one embodiment provides a needle assist device, the needle assist device comprising:

[0006] The body has a receiving cavity and an opening communicating with the receiving cavity, the opening facing a first direction, and the body has a first protrusion;

[0007] A sleeve is located within the accommodating cavity. The sleeve has a second protrusion that abuts against the first protrusion in the first direction to prevent the sleeve from dislodging from the accommodating cavity.

[0008] A cover, located at the opening, is detachably connected to the body, and the cover has a first limiting part;

[0009] The main body and the sleeve have a first locking structure. When the cover is connected to the main body, the first limiting part keeps the first locking structure locked. When the cover is separated from the main body, the first locking structure is unlocked. One of the sleeve and the main body can move toward the other in the first direction under the action of external force.

[0010] In an optional embodiment, the first locking structure includes a fixed protrusion and a first elastic protrusion, one of which is located on the body and the other on the sleeve; the first limiting portion is used to restrict the deformation of the first elastic protrusion to keep the first elastic protrusion and the fixed protrusion abutting against each other in the first direction; when the cover is separated from the body, the first elastic protrusion can elastically deform under the action of external force to release the abutment against the fixed protrusion.

[0011] In one alternative embodiment, the first elastic protrusion is located on the sleeve, the fixed protrusion is located on the body, and the first limiting portion is located on the side of the first elastic protrusion away from the body in a plane perpendicular to the first direction.

[0012] In one alternative embodiment, the first elastic protrusion includes an elastic arm and a protrusion, the elastic arm extending from the opening into the receiving cavity in the first direction, and the protrusion being connected to the suspended end of the elastic arm.

[0013] In one alternative embodiment, one of the cover and the body has a groove and the other has a protrusion. The groove is arranged around the receiving cavity and has an opening and a locking portion arranged in its extending direction. The opening faces the first direction, and the protrusion can enter the groove from the opening and slide along the groove to engage with the locking portion.

[0014] In one optional embodiment, the needle aid includes a monitor bracket and a trigger elastic element. The monitor bracket is located within the sleeve and is used to mount an analyte monitor. A second locking structure is provided between the monitor bracket and the sleeve. The body has an unlocking part that contacts the second locking structure under external force to unlock. The trigger elastic element is located between the sleeve and the monitor bracket to apply an elastic force to the monitor bracket, causing it to move toward the opening.

[0015] In one optional embodiment, the second locking structure includes a second limiting part and a second elastic protrusion. The second limiting part is located on the sleeve body, and the second elastic protrusion is located on the monitor bracket. Under the action of the trigger elastic member, the second elastic protrusion abuts against the second limiting part in the first direction. The unlocking part is used to contact the second elastic protrusion to deform the second elastic protrusion and release the abutment against the second limiting part.

[0016] In one alternative embodiment, the needle assist device includes a guide needle and a guide needle holder, the guide needle being connected to the guide needle holder, the guide needle being used to guide the analyte monitor to be implanted into the human body, and the guide needle holder being mounted on the monitor holder.

[0017] In an optional embodiment, the needle assist device further includes a needle retraction elastic member located between the guide needle support and the monitor support to apply an elastic force to the guide needle support to move it away from the opening, and the monitor support has a third elastic protrusion for limiting the travel of the guide needle support relative to the monitor support.

[0018] The sleeve has a supporting portion, which is used to contact the third elastic protrusion during the movement of the monitor bracket toward the opening, causing the third elastic protrusion to deform and release the restriction on the guide needle bracket.

[0019] In one alternative embodiment, the sleeve has a third limiting portion that abuts against the guide pin bracket in the first direction when the second locking structure is locked.

[0020] The needle aid according to the above embodiment includes a body, a sleeve, and a cover. The body has a receiving cavity and an opening facing a first direction. The body has a first protrusion. The sleeve is located within the receiving cavity and has a second protrusion. The second protrusion abuts against the first protrusion in the first direction to restrict the sleeve from dislodging from the receiving cavity. The cover is located at the opening and is detachably connected to the body. The cover has a first limiting portion. A first locking structure exists between the body and the sleeve. When the cover is connected to the body, the first limiting portion maintains the first locking structure in place, and the body and the sleeve are relatively fixed in the first direction. This allows for safe transport. During the process, it is ensured that the needle aid will not be accidentally triggered; when the cover and the body are separated, the first limiting part unlocks the first locking structure, and the body can move toward the sleeve under the action of external force to trigger the needle aid. In this way, the first locking structure is unlocked by separating the cover and the body, and then the needle aid is triggered by applying external force. On the one hand, there is no need to perform an additional step to unlock the first locking structure, and on the other hand, there is no need for additional parts to lock the sleeve and the body. This helps to reduce the assembly steps of the needle aid, reduce the assembly cost of the needle aid, and facilitate the use and operation of the needle aid. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the needle-aid device;

[0022] Figure 2 This is a schematic cross-sectional view of one embodiment of the needle-aid device;

[0023] Figure 3This is another cross-sectional structural schematic diagram of one embodiment of the needle-aid device;

[0024] Figure 4 This is another cross-sectional structural schematic diagram of an embodiment of the needle aid device;

[0025] Figure 5 Another cross-sectional structural schematic diagram of an embodiment of the needle aid device;

[0026] Figure 6 This is an exploded structural diagram of the needle aid body and cover in one embodiment.

[0027] In the picture:

[0028] 1. Body; 11. Receiving cavity; 12. Opening; 13. First protrusion; 100. First locking structure; 14. Fixing protrusion; 141. Second locking surface; 15. Slide groove; 151. Groove; 16. Snap-fit ​​part; 17. Unlocking part; 18. Protruding part; 191. Second outward protrusion structure; 192. Third outward protrusion structure;

[0029] 2. Sleeve body; 21. First cylindrical body; 211. Second protrusion; 212. First elastic protrusion; 2121. Elastic arm; 2122. Protrusion; 2123. First locking surface; 22. Second cylindrical body; 221. Second limiting part; 222. Supporting part; 223. Third limiting part;

[0030] 3. Cover; 31. First limiting part; 32. Protrusion; 321. Slot;

[0031] 4. Monitor bracket; 200. Second locking structure; 41. Second elastic protrusion; 42. Third elastic protrusion; 421. Limiting structure; 422. Supporting structure; 43. First outward protrusion structure;

[0032] 5. Triggering elastic element; 6. Analyte monitor; 7. Guide pin; 8. Guide pin support; 81. Hook structure; 82. Outward protrusion; 9. Retracting elastic element.

[0033] Explanation of reference numerals in parentheses in the accompanying drawings: The feature referred to by the reference numerals in parentheses in the accompanying drawings is the feature represented by both the number inside the parentheses and the number outside the parentheses. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0035] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0036] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0037] This application discloses a needle-assist device, applied in the field of medical device technology, used to assist in the implantation of an analyte monitor into the body. Please refer to... Figures 1 to 6 The needle-aid device of this application includes a body 1, a sleeve 2, and a cover 3. The body 1 has a receiving cavity 11 and an opening 12 communicating with the receiving cavity 11. The opening 12 faces a first direction. The body 1 is generally a cylindrical structure with one end open and one end closed in the first direction. The internal space of the cylindrical structure is the receiving cavity 11. The body 1 has a first protrusion 13 on the cavity wall of the receiving cavity 11, that is, on the inner wall of the cylindrical structure. The sleeve 2 is located in the receiving cavity 11. One end of the sleeve 2 in the first direction extends out from the opening 12 of the receiving cavity 11 for contact with the human body when the needle-aid device is in use. The sleeve 2 has a second protrusion 211 facing the cavity wall of the receiving cavity 11. The second protrusion 211 can abut against the first protrusion 13 in the first direction to restrict the sleeve 2 from falling out of the receiving cavity 11, that is, to restrict the body 1 from moving away from the human body relative to the sleeve 2.

[0038] The first protrusion 13 and the second protrusion 211 are arranged in pairs, and there are three of each. The three first protrusions 13 and the three second protrusions 211 are evenly spaced around the circumference of the receiving cavity 11, which effectively enhances the restrictive effect of the first protrusion 13 on the sleeve 2. The first protrusion 13 and the second protrusion 211 are both provided with guide slopes facing the first direction. The two guide slopes can cooperate during the installation of the sleeve 2 from the opening 12 into the receiving cavity 11 in the first direction, so as to facilitate the second protrusion 211 to pass over the first protrusion 13 under the action of external force to realize the installation of the sleeve 2 in the body 1.

[0039] The cover 3 is located at the opening 12. The cover 3 can be detachably connected to the body 1. The cover 3 is generally a cylindrical structure with one end open and the other end closed. The cover 3 can be placed on the body 1. The side of the cover 3 facing the body 1, that is, the inner wall of the cover 3, has a first limiting part 31. The first limiting part 31 can be set on the bottom wall of the cover 3.

[0040] A first locking structure 100 is provided between the main body 1 and the sleeve 2. The first locking structure 100 and the first limiting part 31 are arranged in pairs, with three of each. The three first locking structures 100 and the three first limiting parts 31 are evenly spaced around the circumference of the receiving cavity 11. When the cover 3 is connected to the main body 1, the first limiting part 31 can cooperate with the paired first locking structures 100 to keep the first locking structures 100 locked. The main body 1 and the sleeve 2 are relatively fixed in a first direction under the action of the first locking structure 100 and the first protrusion 13 and the second protrusion 211, thus ensuring that the needle aid will not be accidentally triggered during transportation. When the cover 3 is separated from the main body 1... The separation state is when the cover 3 and the body 1 are not in contact. The first limiting part 31 releases its locking effect on the corresponding first locking structure 100, and the first locking structure 100 is unlocked. One of the sleeve 2 and the body 1 can move towards the other in the first direction under the action of external force. That is, the body 1 can move towards the human body relative to the second sleeve 2 in the first direction. In this way, by separating the cover 3 and the body 1, it is convenient to trigger the needle aid by pushing the body 1 under the action of external force. On the one hand, there is no need to perform the additional step of unlocking the sleeve 2 and the body 1. On the other hand, there is no need for additional parts, which helps to reduce the assembly steps of the needle aid, reduce the assembly cost of the needle aid, and facilitate the use and operation of the needle aid.

[0041] In some embodiments, please refer to Figure 2 and Figure 4The first locking structure 100 includes a fixed protrusion 14 and a first elastic protrusion 212. One of the fixed protrusion 14 and the first elastic protrusion 212 is located on the body 1, and the other is located on the sleeve 2. For example, the first elastic protrusion 212 can be disposed on the sleeve 2 and the fixed protrusion 14 can be disposed on the body 1, or the elastic protrusion can be located on the body and the fixed protrusion can be located on the sleeve. The first limiting part 31 can cooperate with the first elastic protrusion 212 when the body 1 and the cover 3 are connected to limit the deformation of the first elastic protrusion 212 and keep the first elastic protrusion 212 and the fixed protrusion 14 abutting each other in the first direction. When the cover 3 is separated from the body 1, under the action of external force, the first elastic protrusion 212 can elastically deform to pass over the fixed protrusion 14, release the abutment with the fixed protrusion 14, and satisfy the requirement that the cover 3 can move relative to the sleeve 2 toward the human body.

[0042] In some embodiments, please continue to refer to Figure 2 and Figure 4 The sleeve 2 has a first cylindrical body 21 extending in a first direction. The first cylindrical body 21 is coaxially arranged with the cylindrical structure of the body 1. A first elastic protrusion 212 is disposed on the first cylindrical body 21 of the sleeve 2. A fixed protrusion 14 is disposed on the inner wall of the body 1. A first limiting part 31 is disposed in a plane perpendicular to the first direction on the side of the first elastic protrusion 212 away from the body 1. This can reserve a sufficiently large accommodating space for the first limiting part 31, which facilitates the structural setting of a larger first limiting part 31 and ensures the limiting effect of the first limiting part 31 on the first elastic protrusion 212. Of course, in other embodiments, if the elastic protrusion is disposed on the cylindrical wall of the body and the fixed protrusion is disposed on the outer cylindrical wall of the sleeve, then the first limiting part is located on the side of the body away from the sleeve in the plane perpendicular to the first direction. The first limiting part is located between the body and the cover. Since the space reserved between the body and the cover is small, the size of the first limiting part is also small. If it is necessary to satisfy that the first limiting part has a good limiting effect on the first elastic protrusion, it is necessary to satisfy that the first limiting part has a large size in the circumferential direction around the body, or it is necessary to have a large gap between the body and the cover.

[0043] In some embodiments, please continue to refer to Figure 2 and Figure 4For the first elastic protrusion 212, it is located on the cylindrical wall of the first cylindrical body 21 of the sleeve 2. It includes an elastic arm 2121 and a protrusion 2122. The elastic arm 2121 extends from the opening 12 into the receiving cavity 11 in the first direction. The protrusion 2122 is connected to the suspension end of the first elastic protrusion 212. Under the action of the first limiting part 31 or external force, the protrusion 2122 can move towards or away from the body 1 in a plane perpendicular to the first direction under the elastic action of the elastic arm 2121, so as to realize the elastic deformation of the entire first elastic protrusion 212. Of course, in other embodiments, the elastic arm in the first elastic protrusion may also move from the accommodating cavity to the opening direction in the first direction; since the first limiting part 31 moves from the opening 12 into the accommodating cavity 11 during the connection process between the cover 3 and the body 1, the structure in which the elastic arm 2121 extends from the opening 12 into the accommodating cavity 11 in the first direction can guide the first limiting part 31 and the first elastic protrusion 212 to abut against each other in a plane perpendicular to the first direction, so as to facilitate the locking of the first limiting part 31 to the first locking structure 100.

[0044] In one embodiment, the first elastic protrusion 2122 has a first locking surface 2123 facing the fixed protrusion 14 when the first locking structure 100 is in the locked state, and the fixed protrusion 14 has a second locking surface 141 facing the first elastic protrusion 212 when the first locking structure 100 is in the locked state. Both the first locking surface 2123 and the second locking surface 141 are inclined surfaces. The first locking surface 2123 cooperates with the second locking surface 141, and the first elastic protrusion 212 can be restricted by the first limiting portion 31. Under the action of the first locking surface 2123 and the second locking surface 141, the first elastic protrusion 212 and the fixed protrusion 14 are made to fit together, which facilitates a good locking effect between them. Furthermore, the fact that both the first locking surface 2123 and the second locking surface 141 are inclined surfaces also makes it convenient for the sleeve 2 or the cover 3 to pass over the second locking surface 141 after the first elastic protrusion 212 is deformed under the action of external force when the cover 3 is separated from the body 1. In other words, it is convenient to unlock the first locking structure 100 under the action of external force.

[0045] In some embodiments, the fixing protrusion 14 on the body 1 can be omitted from the first locking structure 100. The first elastic protrusion 212 in the first locking structure 100 can also be replaced by a fixing structure on the sleeve 2. This fixing structure is one that does not undergo elastic deformation under external force. The fixing structure can be the side wall of the first cylindrical body 21 on the sleeve 2 or a protrusion on the side wall of the first cylindrical body 21. When the cover 3 is connected to the body 1, the fixing structure abuts against the first limiting part 31 in the first direction to restrict the movement of the sleeve 2 relative to the body 1 towards the receiving cavity 11, thereby locking the body 1 and the sleeve 2. It should be noted that the first locking structure 100, which only includes the fixing structure on the sleeve 2, is only applicable when the cover 3 and the body 1 are connected by relative rotation. During rotation, the first limiting part 31 can rotate to the side of the fixing structure facing the receiving cavity 11 in the first direction, so that the first limiting part 31 abuts against the fixing structure in the first direction.

[0046] In some embodiments, the connection between the cover 3 and the body 1 can be a threaded connection. When the cover 3 and the body 1 are screwed into place to achieve locking, the second limiting part 221 just abuts against the first elastic protrusion 212 in a plane perpendicular to the first direction, or just abuts against the fixing structure in the first direction. When the cover 3 and the body 1 are separated by rotation, the second limiting part 221 is staggered from the first elastic protrusion 212 or the fixing structure in the circumferential direction surrounding the accommodating cavity 11, so that the second limiting part 221 can lock and unlock the first locking structure 100 through the connection state between the cover 3 and the body 1.

[0047] In some embodiments, the cover 3 and the body 1 can also be connected by a snap fastener. The cover 3 can move relative to the body 1 in a first direction to achieve the snap fastening of the cover 3 and the body 1. After the cover 3 and the body 1 are snapped into place, the first limiting part 31 abuts against the first elastic protrusion 212. When the cover 3 and the body 1 are separated, the first limiting part 31 and the first elastic protrusion 212 separate.

[0048] In some embodiments, the cover 3 can also be connected to the body 1 via a snap-fit ​​structure after rotation; please refer to [reference needed]. Figure 6 One of the cover 3 and the body 1 has a groove 15 and the other has a protrusion 32. The groove 15 is arranged around the receiving cavity 11. The groove 15 has a slot 151 and a locking part 16 arranged in its extending direction. The slot 151 faces the first direction. The protrusion 32 can enter the groove 15 from the slot 151 along the first direction and slide along the groove 15 to lock with the locking part 16.

[0049] In one embodiment, please continue to refer to Figure 6The groove 15 is located on the outer peripheral surface of the body 1, and the protrusion 32 is located on the inner peripheral surface of the cover 3. Of course, in other embodiments, the groove can also be located on the inner peripheral surface of the cover, and the protrusion is located on the outer peripheral surface of the body. The engaging part 16 and the slot 151 are located at both ends of the groove 15 in the extending direction of the groove 15. The engaging part 16 includes an elastic hook, and the protrusion 32 is provided with a slot 321. After the protrusion 32 slides into place along the groove 15, the elastic hook engages with the slot 321 to realize the connection between the cover 3 and the body 1. In other embodiments, the protrusion can also be set as an elastic hook, and the engaging part in the groove can be set as a slot. After the protrusion slides into place along the groove, the elastic hook engages with the slot to realize the connection between the cover and the body.

[0050] To facilitate the separation of the cover 3 from the body 1, guide slopes are provided on both the groove wall of the slot 321 and the elastic hook, which can facilitate the elastic hook to detach from the slot 321.

[0051] In some embodiments, please refer to Figures 2 to 5 The entire needle-aid device includes a monitor bracket 4 and a trigger elastic element 5. The monitor bracket 4 is located inside the sleeve 2 and is used to install the analyzer monitor 6. There is a second locking structure 200 between the monitor bracket 4 and the sleeve 2. The main body 1 has an unlocking part 17. When the first locking structure 100 is in the unlocked state, the unlocking part 17 can unlock the second locking structure 200 by contacting it under the action of external force.

[0052] The trigger elastic element 5 is located between the sleeve 2 and the monitor bracket 4. The sleeve 2 has a second cylindrical body 22, which is coaxially arranged with the first cylindrical body 21. The second cylindrical body 22 is smaller than the first cylindrical body 21 in a first direction. One end of the second cylindrical body 22 is connected to the end of the first cylindrical body 21 within the accommodating cavity 11. The trigger elastic element 5 is located between the first cylindrical body 21 and the second cylindrical body 22. The monitor bracket 4 has a portion located between the first cylindrical body 21 and the second cylindrical body 22, which elastically abuts against the trigger elastic element 5. When the second locking structure 200 is in the unlocked state, the trigger elastic element 5 can apply an elastic force to the monitor bracket 4 to move it toward the opening 12, thereby realizing the implantation of the analyte monitor 6. In other embodiments, the trigger elastic element 5 can be omitted, and the monitor bracket 4 can be implanted by pushing the body 1 with an external force, and the unlocking part 17 on the body 1 can push the monitor bracket 4.

[0053] In one embodiment, please continue to refer to Figures 2 to 5 There are three second locking structures 200, which are evenly spaced around the circumference of the accommodating cavity 11. The number and position of the unlocking parts 17 on the main body 1 correspond to the second locking structures 200.

[0054] The second locking structure 200 includes a second limiting part 221 and a second elastic protrusion 41. The second limiting part 221 is located on the wall of the second cylinder 22 on the sleeve 2, and the second elastic protrusion 41 is located on the monitor bracket 4. When the second locking structure 200 is in the locked state, the second elastic protrusion 41 can abut against the second limiting part 221 in the first direction to restrict the monitor bracket 4 from moving relative to the sleeve 2 toward the opening 12 under the action of the trigger elastic member 5.

[0055] The second limiting part 221 extends away from the body 1 in a plane perpendicular to the first direction. The second limiting part 221 has a through groove extending in the first direction. The through groove is open at both ends in its extending direction. The second elastic protrusion 41 includes an elastic arm and a protrusion. The elastic arm 2121 extends from the opening 12 into the receiving cavity 11 in the first direction. The protrusion is provided at the suspension end of the elastic arm 2121. During the installation of the monitor bracket 4 from the opening 12 into the receiving cavity 11, the second elastic protrusion 41 is inserted into the through groove. When the protrusion contacts the groove sidewall of the through groove, the second elastic protrusion 41 deforms until the protrusion crosses the through groove. The second elastic protrusion 41 returns to its deformed state, and the protrusion abuts against the groove sidewall of the through groove in the first direction.

[0056] The unlocking part 17 is disposed on the bottom wall of the accommodating cavity 11 of the main body 1, that is, on the bottom wall of the cylindrical structure. The unlocking part 17 extends into the accommodating cavity 11. When the first locking structure 100 is in the unlocked state, the main body 1 moves toward the human body under the action of external force. The unlocking part 17 can contact the protrusion of the second elastic protrusion 41, so that the elastic arm moves toward the through groove in the plane perpendicular to the first direction, that is, moves away from the through groove side wall that abuts against the protrusion, until the protrusion and the through groove side wall are misaligned in the plane perpendicular to the first direction. Then, under the action of the trigger elastic member 5, the entire monitoring device bracket 4 moves toward the human body relative to the sleeve 2 in the first direction, and the second elastic protrusion 41 releases its abutment with the second limiting part 221 in the first direction.

[0057] To facilitate the contact between the unlocking part 17 and the second elastic protrusion 41 under external force, thereby deforming the second elastic protrusion 41, a slope is provided on the end face of the second elastic protrusion 41 facing the unlocking part 17, and a slope is provided on the end face of the unlocking part 17 facing the second elastic protrusion 41. The two slopes can contact each other under external force. After contact, the second elastic protrusion 41 can deform in the desired direction, that is, in the through groove, so as to release the resistance of the second limiting part 221 to the first elastic protrusion 212.

[0058] In some embodiments, to prevent the monitor bracket 4 from moving toward the human body and dislodging from the containment cavity 11 when the second locking structure 200 is unlocked, please refer to... Figure 5The monitor bracket 4 is also provided with a first protruding structure 43, which passes through the sleeve 2 in a plane perpendicular to the first direction. A second protruding structure 191 is provided on the inner wall of the corresponding body 1, protruding towards the receiving cavity 11. The orthographic projection of the first protruding structure 43 in the plane perpendicular to the first direction coincides with the orthographic projection of the second protruding structure 191 in the same plane. During the movement of the monitor bracket 4 towards the human body, the first protruding structure 43 and the second protruding structure 191 can abut against each other in the first direction to prevent the monitor bracket 4 from detaching from the receiving cavity 11. A third protruding structure 192 is also provided on the inner wall of the body 1, protruding towards the receiving cavity 11. When the second locking structure 200 is locked, the third protruding structure 192 abuts against the first protruding structure 43 in the first direction to ensure that the position of the monitor bracket 4 relative to the body 1 or the sleeve 2 is fixed.

[0059] In some embodiments, please refer to Figures 2 to 5 To facilitate the implantation of the analyte monitor 6 and increase the probability of implantation, an assist device is provided, including a guide needle 7 and a guide needle holder 8. The guide needle 7 is connected to the guide needle holder 8 and is used to guide the analyte monitor 6 into the human body. The guide needle holder 8 is mounted on the monitor holder 4, and the analyte monitor 6 is installed in the opening 12 of the monitor holder 4, i.e., the side facing the human body. The guide needle 7 passes through the monitor holder 4, and the guide needle holder 8 is located within the monitor. On the side of the instrument support 4 furthest from the human body, the needle tip of the guide needle 7 is located on the side facing the human body. The needle tip of the guide needle 7 is a hollow needle tip. The monitoring end of the analyzer monitor 6 is located inside the needle tip of the guide needle 7 and can be implanted into the human body along with the needle tip of the guide needle 7. The needle tail of the guide needle 7 is located on the side of the monitor support 4 furthest from the human body and is connected to the guide needle support 8 through a hook structure 81, so that the needle tip of the guide needle 7 can be easily pulled out of the human body when the guide needle support 8 moves away from the human body.

[0060] After the first locking structure 100 and the second locking structure 200 are both unlocked, under the action of the trigger elastic element 5, the monitor bracket 4, the analyzer monitor 6, the guide needle bracket 8 and the guide needle 7 all move toward the human body until the analyzer monitor 6 is successfully implanted into the human body under the guidance of the needle tip of the guide needle 7.

[0061] In some embodiments, the needle tip of the guide needle 7 can be moved out of the body by moving the entire needle aid away from the body, thereby reducing the complexity and cost of the entire needle aid structure. However, in structures where the needle tip of the guide needle 7 is removed by pulling with external force, the monitoring end of the analyzer 6 may move out with the needle tip of the guide needle 7, resulting in a lower probability of successful implantation.

[0062] Therefore, in some embodiments, please continue to refer to Figures 2 to 5 The needle assist device also includes a needle retraction elastic element 9. The needle retraction elastic element 9, like the trigger elastic element 5, can be a spring or a rubber elastic element. The needle retraction elastic element 9 is located between the guide needle support 8 and the monitor support 4 to apply an elastic force to the guide needle support 8 to move it away from the opening 12. The monitor support 4 has a third elastic protrusion 42. There are three third elastic protrusions 42, which are evenly spaced around the circumference of the receiving cavity 11. The third elastic protrusion 42 has a limiting structure 421. The limiting structure 421 is a hook protruding towards the cavity wall of the receiving cavity 11 in the vertical first direction. The hook can abut against the guide needle support 8 in the first direction to limit the travel of the guide needle support 8 relative to the monitor support 4 away from the opening 12 in the first direction.

[0063] In order to facilitate the withdrawal of the guide needle 7 after the auxiliary analyzer monitor 6 is implanted, a retaining part 222 is provided on the sleeve 2. The number and position of the retaining part 222 correspond to the number and position of the third elastic protrusion 42, respectively. The monitor bracket 4 has a part located inside the second cylinder 22, and the third elastic protrusion 42 is located on this part. The abutment portion 222 is located on the wall of the second cylindrical body 22 of the sleeve 2. The abutment portion 222 can be a slope or a protrusion. The third elastic protrusion 42 has an elastic arm and an abutment structure 422. The elastic arm extends from the opening 12 into the accommodating cavity 11 in the first direction. The abutment structure 422 and the limiting structure 421 are both provided at the suspension end of the elastic arm. The abutment structure 422 and the limiting structure 421 are arranged at intervals around the accommodating cavity 11 in the circumferential direction. The abutment structure 422 is a block-shaped structure facing the protrusion of the second cylindrical body 22 of the sleeve 2 in a plane perpendicular to the first direction. The abutment structure 422 can abut against the abutment portion 222. The abutment structure 422 can also abut against the protrusion 18 on the bottom wall of the body 1 in the first direction when the second locking structure 200 is locked, so as to ensure that the guide needle bracket 8 is relatively fixed to the sleeve 2 or the body 1 when the second locking structure 200 is locked, which helps to ensure the stability of the overall structure during the transportation of the needle aid.

[0064] In the unlocked state of the second locking structure 200, the monitor bracket 4 moves toward the opening 12 of the receiving cavity 11 under the action of the trigger elastic element 5. The limiting structure 421 of the third elastic protrusion 42 can abut against the guide needle bracket 8 in the first direction, so as to drive the guide needle bracket 8 and the guide needle 7 to assist the analyzer monitor 6 in implanting into the human body. In the later part of the implantation stroke of the analyzer monitor 6, the abutment part 222 on the sleeve 2 abuts against the abutment structure 422 in the third elastic protrusion 42 in a plane perpendicular to the first direction, and the third elastic protrusion 42... 2. The entire device deforms away from the second cylinder 22 in a plane perpendicular to the first direction, thereby releasing the restriction effect of the upper limit structure 421 of the third elastic protrusion 42 on the guide needle support 8. In this way, the guide needle support 8 can move relative to the monitor support 4 away from the opening 12 under the action of the needle retraction elastic element 9, that is, away from the human body, to achieve needle retraction. At this time, the main body of the analyzer monitor 6 is in contact with the human skin, and the monitoring end of the analyzer monitor 6 will not easily fall out of the human body, which can effectively improve the implantation probability of the entire needle aid device.

[0065] In some embodiments, please continue to refer to Figures 2 to 5 For the guide needle support 8, it has a recess, and the needle retraction elastic member 9 is located in the recess. The two ends of the needle retraction elastic member 9 in the first direction elastically abut against the guide needle support 8 and the monitor support 4 respectively. The hook structure 81 that cooperates with the guide needle 7 is located on the bottom wall of the recess. The hook structure 81 extends toward the opening 12 of the recess to engage with the tail of the guide needle 7.

[0066] The guide pin bracket 8 also has three protruding portions 82 extending toward the sleeve 2 in a plane perpendicular to the first direction. The protruding portions 82 can cooperate with the limiting structure 421 of the third elastic protrusion 42 on the monitor bracket 4 when the second locking structure 200 is unlocked. When the second locking structure 200 is locked, the limiting structure 421 of the third elastic protrusion 42 and the protruding portions 82 on the guide pin bracket 8 are spaced apart in the first direction. This ensures that the guide pin bracket 8 has a small size in the first direction while ensuring the position of the limiting structure 421 of the third elastic protrusion 42, so that the limiting structure 421 can have a deformation amount sufficient to avoid the protruding portions 82 under the action of the abutment portion 222.

[0067] The second cylindrical body 22 of the sleeve 2 also has a third limiting part 223. There are three third limiting parts 223, which are evenly spaced around the circumference of the receiving cavity 11. The third limiting part 223 can be an elastic hook extending in the first direction toward the opening 12 of the receiving cavity 11. The elastic hook protrudes in the direction of the guide needle bracket 8. When the second locking structure 200 is locked, the third limiting part 223 can abut against the outward protrusion 82 of the guide needle bracket 8 in the first direction, so as to ensure that the guide needle bracket 8 and the monitoring device bracket 4 are relatively fixed in the first direction when the second locking structure 200 is locked. The third limiting part 223 has a slope. The slope can cooperate with the outward protrusion 82 of the guide needle bracket 8 during the needle retraction process when the guide needle bracket 8 moves away from the opening 12 of the receiving cavity 11, so as to buffer the force of the needle retraction of the guide needle bracket 8 and avoid the guide needle bracket 8 from colliding with other parts of the body 1 or the sleeve 2 during the needle retraction process, which would produce a large impact sound.

[0068] In other embodiments, the limiting structure 421 on the third elastic protrusion 42 can also abut against the outward protrusion 82 of the guide needle support 8 in the first direction when the second locking structure 200 is locked. This eliminates the need for the third limiting part 223 on the second cylinder 22 of the sleeve 2, simplifying the overall structure of the needle aid. Alternatively, the structure of the third limiting part 223 on the second cylinder 22 can be retained. When the limiting structure 421 abuts against the outward protrusion 82 of the guide needle support 8 in the first direction when the second locking structure 200 is locked, the third limiting part 233 abuts against the guide needle support. Under the squeezing action of the protruding part 82 of the frame 8, elastic deformation occurs towards the cylindrical side wall of the body 1. When the second locking structure 200 is unlocked, the limiting structure 421 drives the entire guide needle support 8 to move towards the human body. After the third elastic protrusion 42 elastically deforms to release the limiting structure 421 from the limiting action of the guide needle support 8, the guide needle support 8 moves away from the human body under the action of the needle retraction elastic member 9 to realize needle retraction. During the needle retraction process, the inclined surface on the third limiting part 223 can cooperate with the inclined surface on the protruding part 82 to buffer the impact force during the needle retraction process of the guide needle support 8, thereby reducing the needle retraction noise.

[0069] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A needle-aiding device, characterized in that, The needle assist device includes: The body has a receiving cavity and an opening communicating with the receiving cavity, the opening facing a first direction, and the body has a first protrusion; A sleeve is located within the accommodating cavity. The sleeve has a second protrusion that abuts against the first protrusion in the first direction to prevent the sleeve from dislodging from the accommodating cavity. A cover, located at the opening, is detachably connected to the body, and the cover has a first limiting part; The main body and the sleeve have a first locking structure. When the cover is connected to the main body, the first limiting part keeps the first locking structure locked. When the cover is separated from the main body, the first locking structure is unlocked. One of the sleeve and the main body can move toward the other in the first direction under the action of external force.

2. The needle-aid device as described in claim 1, characterized in that, The first locking structure includes a fixed protrusion and a first elastic protrusion, one of which is located on the body and the other is located on the sleeve. The first limiting part is used to restrict the deformation of the first elastic protrusion to keep the first elastic protrusion and the fixed protrusion abutting against each other in the first direction. When the cover is separated from the body, the first elastic protrusion can elastically deform under the action of external force to release the abutment against the fixed protrusion.

3. The needle-aid device as described in claim 2, characterized in that, The first elastic protrusion is located on the sleeve body, the fixed protrusion is located on the main body, and the first limiting portion is located on the side of the first elastic protrusion away from the main body in a plane perpendicular to the first direction.

4. The needle-aid device as described in claim 2, characterized in that, The first elastic protrusion includes an elastic arm and a protrusion. The elastic arm extends from the opening into the receiving cavity in the first direction, and the protrusion is connected to the suspended end of the elastic arm.

5. The needle-aid device as described in any one of claims 1 to 4, characterized in that, One of the cover and the body has a groove, and the other has a protrusion. The groove is arranged around the receiving cavity. The groove has a slot and a locking part arranged in its extending direction. The slot faces the first direction. The protrusion can enter the groove from the slot and slide along the groove until it engages with the locking part.

6. The needle-aid device as described in any one of claims 1 to 4, characterized in that, The needle-aid device includes a monitor bracket and a trigger elastic element. The monitor bracket is located inside the sleeve and is used to install an analyte monitor. A second locking structure is provided between the monitor bracket and the sleeve. The main body has an unlocking part. The unlocking part contacts the second locking structure under the action of external force to unlock. The trigger elastic element is located between the sleeve and the monitor bracket to apply an elastic force to the monitor bracket to move it toward the opening.

7. The needle-aid device as described in claim 6, characterized in that, The second locking structure includes a second limiting part and a second elastic protrusion. The second limiting part is located on the sleeve body, and the second elastic protrusion is located on the monitor bracket. Under the action of the trigger elastic element, the second elastic protrusion abuts against the second limiting part in the first direction. The unlocking part is used to contact the second elastic protrusion to deform the second elastic protrusion and release the abutment against the second limiting part.

8. The needle-aiding device as described in claim 6, characterized in that, The needle-assist device includes a guide needle and a guide needle holder. The guide needle is connected to the guide needle holder. The guide needle is used to guide the analyte monitor to be implanted into the human body. The guide needle holder is mounted on the monitor holder.

9. The needle-aid device as described in claim 8, characterized in that, The needle assist device further includes a needle retraction elastic element located between the guide needle support and the monitor support to apply an elastic force to the guide needle support to move it away from the opening. The monitor support has a third elastic protrusion for limiting the travel of the guide needle support relative to the monitor support. The sleeve has a supporting portion, which is used to contact the third elastic protrusion during the movement of the monitor bracket toward the opening, causing the third elastic protrusion to deform and release the restriction on the guide needle bracket.

10. The needle-aiding device as described in claim 9, characterized in that, The sleeve has a third limiting part, which abuts against the guide needle bracket in the first direction when the second locking structure is locked.

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