Application device and holding mechanism for sharp object

Abstract

The present disclosure describes an application device and a holding mechanism for a sharp object, the application device comprising a sharp object, a holding mechanism for holding the sharp object, the holding mechanism comprising a deflectable securing portion and a restricting portion, the sharp object comprising a cap portion, the securing portion having the holding structure for holding the sharp object, the restricting portion being configured to restrict the securing portion during assembly of the sharp object with the holding mechanism. The upper surface of the cap part is in contact with the retaining structure and enables the fixing part to deflect away from the central axis of the retaining mechanism, and when the sharp object is assembled to a preset position, the fixing part automatically returns to enable the retaining structure to be in contact with the lower surface of the cap part so as to fix the sharp object; the restricting portion is configured to suppress rotation of the sharp object. According to the present disclosure, it is possible to provide a highly reliable application device and a holding mechanism for a sharp object.

Description

Technical Field

[0001] The present disclosure relates to the field of biomedical engineering industry, and in particular to an application device and a sharp object holding mechanism. Background Art

[0002] A glucose monitor is a device used to continuously monitor a person's blood sugar concentration, enabling the user to adjust blood sugar concentrations in a timely manner, such as by adjusting diet or taking medication, thereby reducing the risk of complications caused by abnormal blood sugar concentrations.

[0003] The glucose monitor generally includes a sensor at least partially implanted in a host and an application device for applying the sensor to the host, wherein the application device also includes a sharp object for accommodating the sensor and a clamping member for holding the sharp object. When the sensor needs to be applied to the host, the application device drives the sharp object toward the host through the clamping member and pierces the host's skin, and the sensor follows the sharp object and is placed subcutaneously.

[0004] However, if the sharp object rotates or deviates relative to the clamping member while the clamping member drives the sharp object toward the host, the position of the sensor implanted under the human skin may be inaccurate, thereby affecting the reliability of the application device. Summary of the invention

[0005] The present disclosure is proposed in view of the above-mentioned state of the prior art, and an object thereof is to provide an application device and a sharp object holding mechanism with high reliability.

[0006] To this end, the first aspect of the present disclosure provides an application device, which includes a sharp object and a holding mechanism for holding the sharp object, the holding mechanism including a deflectable fixing portion and a limiting portion, the sharp object including a cap portion, the fixing portion having a holding structure for holding the sharp object, and during the assembly of the sharp object and the holding mechanism, the upper surface of the cap portion contacts the holding structure and deflects the fixing portion away from the central axis of the holding mechanism, and when the sharp object is assembled to a predetermined position, the fixing portion automatically returns to a position so that the holding structure contacts the lower surface of the cap portion to fix the sharp object; the limiting portion is configured to inhibit the sharp object from rotating.

[0007] In the application device involved in the first aspect of the present disclosure, by configuring the limiting part to inhibit the sharp object from rotating, the sharp object can be inhibited from deviating or rotating relative to the limiting part in a moving or stationary state, and when the application device drives the holding mechanism to move toward the target direction, the sharp object can be made to move in the same direction as the holding mechanism, thereby facilitating the sharp object to be accurately applied to the target position. Thus, a highly reliable application device can be obtained.

[0008] In addition, in the application device involved in the first aspect of the present disclosure, optionally, the sharp object also includes a neck and a main body, the main body is connected to the cap via the neck, the radial dimension of the neck is smaller than the radial dimension of the cap, the application device includes a proximal end and a distal end with an opening, and when the application device pushes the retaining mechanism toward the distal end, the limiting portion abuts against the upper surface of the main body. In this case, when the cap pushes the fixing portion outward and the fixing portion continues to move in the assembly direction, when the upper end of the neck is in the same plane as the upper surface of the retaining structure, the fixing portion can automatically return to its original position so that the retaining structure abuts against the lower surface of the cap; the force of the application device driving the retaining mechanism can be transmitted to the sharp object via the limiting portion to drive the sharp object to move toward the distal end together.

[0009] In addition, in the application device involved in the first aspect of the present disclosure, optionally, when projected along the direction of the central axis of the application device, the main body and the limiting portion at least partially overlap, and the area of ​​the overlapping portion is not less than 20% of the total projected area of ​​the main body. In this case, the contact area between the main body and the limiting portion can be increased, which is conducive to the holding mechanism transmitting the force to the sharp object, so that the holding mechanism can better push the sharp object toward the distal end.

[0010] In addition, in the application device involved in the first aspect of the present disclosure, optionally, the main body is provided with a hollow structure or a recessed structure recessed inward from the outer surface of the main body. In this case, by providing a hollow structure or a recessed structure recessed inward from the outer surface of the main body, the overall weight of the sharp object can be reduced, thereby reducing the force required by the holding mechanism to hold the sharp object (for example, the sharp object can be held by a fixing portion).

[0011] In addition, in the application device involved in the first aspect of the present disclosure, optionally, the limiting portion contacts at least two surfaces of the sharp object, and the two surfaces are not in the same plane. In this case, at least one prismatic structure can be formed in at least two mutually contacting surfaces of the sharp object to fit the surface of the limiting portion, so that the relative deflection or rotation of the sharp object can be limited by the limiting portion.

[0012] In addition, in the application device involved in the first aspect of the present disclosure, optionally, the application device includes a first limiting structure and a second limiting structure, the first limiting structure is arranged on the surface of the limiting portion in contact with the sharp object, the second limiting structure is arranged on the outer surface of the sharp object, the first limiting structure and the second limiting structure extend in a direction parallel to the central axis of the application device, and when the sharp object is held in the holding mechanism, the first limiting structure is engaged with the second limiting structure. In this case, when the first limiting structure is engaged with the second limiting structure, the relative deflection or rotation between the sharp object and the limiting portion can be limited, thereby improving the stability of the sharp object and the holding mechanism after assembly.

[0013] In addition, in the application device involved in the first aspect of the present disclosure, optionally, the cap portion has a guide surface, and during the assembly process of the sharp object and the fixing portion, the guide surface contacts the retaining structure to guide the fixing portion to deflect outward. In this case, the assembly of the sharp object and the fixing portion is facilitated by the guide surface and the deflectable fixing portion.

[0014] In addition, in the application device involved in the first aspect of the present disclosure, optionally, during the assembly process of the sharp object and the fixing portion, the contact surface between the retaining structure and the guide surface is an inclined surface or a curved surface. In this case, the guiding effect of the guide surface when the deflectable fixing portion is deflected can be further improved, so that the deflectable fixing portion is easier to deflect.

[0015] In addition, in the application device involved in the first aspect of the present disclosure, optionally, the limiting portion and the sharp object have one or more contact surfaces during assembly, the fixing portion is one or more, the limiting portion and the fixing portion constitute a receiving cavity for receiving the sharp object, and the receiving cavity and the sharp object are clearance fit. In this case, compared with an interference fit, the clearance fit between the receiving cavity and the sharp object can maintain the stability of the two after assembly, and can also reduce the friction between the two during the assembly process, thereby facilitating assembly.

[0016] The second aspect of the present disclosure provides a holding mechanism for a sharp object, the holding mechanism includes a deflectable fixing portion and a limiting portion, the sharp object includes a cap portion, the fixing portion has a holding structure for holding the sharp object, during the assembly of the sharp object and the holding mechanism, the upper surface of the cap portion contacts the holding structure and causes the fixing portion to deflect away from the central axis of the holding mechanism, when the sharp object is assembled to a predetermined position, the fixing portion automatically returns to its original position so that the holding structure contacts the lower surface of the cap portion to fix the sharp object; the limiting portion is configured to inhibit the sharp object from rotating. In this case, by configuring the limiting portion to inhibit the sharp object from rotating, the sharp object can be inhibited from deflecting or rotating relative to the limiting portion in a moving or stationary state, and the sharp object and the sharp object holding mechanism can be made to move in the same direction, which is conducive to the sharp object holding mechanism accurately transporting the sharp object to the target position. Thus, a sharp object holding mechanism with high reliability can be obtained.

[0017] According to the present disclosure, it is possible to provide an application device and a sharp object holding mechanism with high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present disclosure will now be explained in further detail, by way of example only, with reference to the accompanying drawings.

[0019] Figure 1 1 is a schematic diagram showing the appearance of an application device according to an example of the present disclosure.

[0020] Figure 2 Schematic diagram showing the structure of a sharp object involved in the example of the present disclosure.

[0021] Figure 3 Schematic diagram showing the structure of a holding mechanism according to an example of the present disclosure.

[0022] Figure 4 Schematic diagram showing the assembly of the holding mechanism and the sharp object involved in the example of the present disclosure.

[0023] Figure 5 It is a first-perspective exploded schematic diagram showing the retaining mechanism and the sharp object involved in the example of the present disclosure.

[0024] Figure 6 2 is a schematic diagram showing a second perspective decomposition of the retaining mechanism and the sharp object involved in the example of the present disclosure.

[0025] Fig. 7A 1 is a schematic diagram showing that the fixing portion according to the example of the present disclosure abuts against the cap portion. Figure 7B 2 is a schematic diagram showing that the fixing portion according to the example of the present disclosure is deflected outward. Figure 7C 2 is a schematic diagram showing the automatic return of the fixing portion involved in the example of the present disclosure.

[0026] Figure 8 Schematic diagram of projection showing the main body and the restriction part involved in the example of the present disclosure.

[0027] Explanation of the reference numerals: 1…application device, 101…proximal end, 102…distal end, 10…holding mechanism, 11…fixing portion, 111…holding structure, 12…limiting portion, 13…accommodating cavity, 20…sharp object, 21…cap portion, 211…guide surface, 22…neck, 23…main body, 24…needle-shaped portion, 241…needle groove, 25…prismatic structure. DETAILED DESCRIPTION

[0028] Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same symbols are assigned to the same components, and repeated descriptions are omitted. In addition, the accompanying drawings are only schematic diagrams, and the ratio of the dimensions of the components or the shapes of the components may be different from the actual ones.

[0029] It should be noted that the terms "including" and "having" and any variations thereof in the present disclosure, such as a process, method, system, product or device that includes or has a series of steps or units, are not necessarily limited to those steps or units clearly listed, but may include or have other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] It should be noted that, in this article, relative position and relative direction terms such as "above", "towards above", "below", "towards downward", "up and down direction", "left side", "towards the left side", "left side", "towards the left", "right side", "towards the right side", "right side", "towards the right", "left and right direction", "front", "towards the front", "back", "towards the back", "front and back direction" are used with reference to the normal operating posture and should not be considered restrictive.

[0031] The first aspect of the present disclosure relates to an application device that can be used to apply a sensor to a host, such as placing the sensor completely or partially under the skin of the host. The application device involved in the present disclosure helps to apply the sensor to the desired position. The application device may sometimes also be called a booster device, a transport device, an implant device, an application device, an auxiliary device, etc. It should be noted that each name is used to represent the device for applying the sensor to the host involved in the present disclosure, and should not be understood as limiting.

[0032] In some examples, the sensor may be an analyte sensor, which may generate information about a specific analyte in the body fluid based on the body fluid, such as reacting with the analyte in the body fluid and generating analyte information. In this case, the sensor reacts with the analyte in the body fluid, thereby facilitating acquisition of analyte information in the body fluid.

[0033] In some examples, the analyte targeted by the analyte sensor may be one or more of glucose, acetylcholine, amylase, bilirubin, cholesterol, chorionic gonadotropin, creatine kinase, creatine, creatinine, DNA, fructosamine, glutamine, growth hormone, hormone, ketone body, lactate, oxygen, peroxide, prostate specific antigen, prothrombin, RNA, thyroid stimulating hormone or troponin. In some examples, the sensor may be a sensor used in a glucose monitor.

[0034] The second aspect of the present disclosure relates to a sharp object holding mechanism, which may also be sometimes referred to as a holding mechanism, a sharp object clamping mechanism, a sharp object fixing mechanism, and the like.

[0035] Hereinafter, the applying device and the sharp object holding mechanism involved in the present disclosure will be described in detail with reference to the accompanying drawings.

[0036] Figure 1 1 is a schematic diagram showing the appearance of an application device 1 according to an example of the present disclosure. Figure 2 2 is a schematic diagram showing the structure of a sharp object 20 according to an example of the present disclosure.

[0037] In some examples, the application device 1 may include a proximal end 101 (see Figure 1 ) and having an open distal end 102 (see Figure 1 ). In some examples, Figure 1 The center SM can be schematically represented as the center axis of the application device 1 .

[0038] In some examples, the application device 1 (see Figure 1 ) may include a sharp object 20 (see Figure 2 In some examples, the sharp object 20 can at least partially accommodate the sensor. In some examples, the sharp object 20 can include a needle portion 24 (see Figure 2 ). For some examples, see Figure 2 The needle portion 24 may be provided with a groove extending along the length direction of the needle portion 24 (hereinafter referred to as the needle groove 241). The sensor may be at least partially disposed in the needle groove 241 of the sharp object 20. In this case, the sensor can be received in the needle groove 241 so that the sensor follows the sharp object 20 and is placed under the skin of the host.

[0039] In some examples, the sharp object 20 may include a cap 21 (see Figure 2 In some examples, the sharp object 20 may include a neck 22 (see Figure 2 ). For some examples, see Figure 2 , the neck 22 can be connected to the cap 21. In some examples, the radial dimension of the neck 22 can be smaller than the radial dimension of the cap 21. Thus, an annular recess located outside the neck 22 can be formed in the sharp object 20.

[0040] In some examples, when the projection is performed along the central axis of the sharp object 20, if the resulting projection figure is a circle, the radial dimension may be the length of the diameter of the circle; if the resulting projection figure is a polygon or an irregular figure, the radial dimension may be the length of the longest diagonal line of the polygon or irregular figure. Figure 2 JM in the figure can be schematically represented as the central axis of the sharp object 20.

[0041] In some examples, the sharp object 20 may include a body portion 23 (see Figure 2 In some examples, the body portion 23 may be connected to the cap portion 21 via the neck portion 22. In some examples, the radial dimension of the body portion 23 may be greater than the radial dimension of the neck portion 22.

[0042] For some examples, see Figure 2 , the main body 23 may be provided with a hollow structure or a recessed structure recessed inward from the outer surface of the main body 23. In some examples, the hollow structure may be provided inside the main body 23. In some examples, the recessed structure recessed inward from the outer surface of the main body 23 may be provided on a side surface of the outer surface of the main body 23, an upper surface of the outer surface, or a lower surface of the outer surface. In this case, by providing a hollow structure or a recessed structure recessed inward from the outer surface of the main body 23, the overall weight of the sharp object 20 can be reduced, thereby reducing the force required for the holding mechanism 10 to hold the sharp object 20 (for example, the sharp object 20 can be held by a fixing portion 11). In addition, when the application device 1 pushes the retaining mechanism 10 to move toward the distal end 102 of the application device 1, the sensor can be placed under the host's skin by the sharp object 20 during the process of the sharp object 20 piercing the host's skin; after the sensor is placed under the skin, the application device 1 drives the retaining mechanism 10 to move toward the proximal end 101 of the application device 1, and the sharp object 20 is withdrawn from under the host's skin under the drive of the retaining mechanism 10 (this process can be referred to as the withdrawal of the sharp object 20). By reducing the overall weight of the sharp object 20, it is possible to facilitate the retaining mechanism 10 to drive the sharp object 20 to withdraw.

[0043] Figure 3 1 is a schematic diagram showing the structure of a holding mechanism 10 according to an example of the present disclosure.

[0044] In some examples, the application device 1 may include a holding mechanism 10 (see Figure 3 ). In some examples, the holding mechanism 10 can be used to hold the sharp object 20. In some examples, the application device 1 can drive the holding mechanism 10 to move toward the host. In this case, the holding mechanism 10 can drive the sharp object 20 to move toward the host, and when the needle-shaped portion 24 of the sharp object 20 pierces the host's subcutaneous tissue, the sensor can be placed subcutaneously.

[0045] In some examples, the holding mechanism 10 may include a fixing portion 11 (see Figure 3 ). In some examples, the fixing portion 11 can be configured to be deflectable. In some examples, the fixing portion 11 can have a retaining structure 111 for retaining the sharp object 20. In some examples, see Figure 3 The retaining structure 111 may be a hook-shaped or protruding portion of the fixing portion 11. In some examples, during the assembly of the sharp object 20 and the retaining mechanism 10, the upper surface of the cap portion 21 contacts the retaining structure 111 and causes the fixing portion 11 to deflect away from the central axis of the retaining mechanism 10. This facilitates the assembly of the sharp object 20 and the retaining mechanism 10. In some examples, Figure 3 The middle BM can be schematically represented as the central axis of the holding mechanism 10. In some examples, the assembly direction, the central axis of the application device 1, the central axis of the sharp object 20 and the central axis of the holding mechanism 10 can be in a positional relationship of being parallel or overlapping with each other.

[0046] Figure 4 1 is a schematic diagram showing the assembly of the holding mechanism 10 and the sharp object 20 involved in the example of the present disclosure. Figure 5 1 is a schematic diagram showing a first perspective exploded view of the holding mechanism 10 and the sharp object 20 involved in the example of the present disclosure. Figure 6 1 is a schematic diagram showing an exploded view of the holding mechanism 10 and the sharp object 20 according to the example of the present disclosure from a second perspective.

[0047] In some examples, when the sharp object 20 is assembled to the predetermined position, the fixing portion 11 can automatically return to position so that the retaining structure 111 contacts the lower surface of the cap portion 21 to fix the sharp object 20. In this case, when the sharp object 20 is assembled to the predetermined position, the fixing portion 11 automatically returns to position so that the retaining structure 111 of the sharp object 20 is located below the cap portion 21 and abuts against the lower surface of the cap portion 21, thereby providing the sharp object 20 with a force to support the sharp object 20 to retain the sharp object 20. In addition, the radial dimension of the neck 22 is smaller than the radial dimension of the cap portion 21, and can provide the required return space of the retaining structure 111 during the automatic return of the fixing portion 11.

[0048] In some examples, the cap portion 21 may have a guide surface 211 (see Figure 2 In some examples, during the assembly process of the sharp object 20 and the fixing portion 11, the guide surface 211 may contact the retaining structure 111 to guide the fixing portion 11 to deflect outward. In this case, the guide surface 211 and the deflectable fixing portion 11 facilitate the assembly of the sharp object 20 and the fixing portion 11.

[0049] In some examples, during the assembly process of the sharp object 20 and the fixing portion 11, the contact surface between the retaining structure 111 and the guide surface 211 may be an inclined surface or a curved surface. In this case, the guiding effect of the guide surface 211 when the deflectable fixing portion 11 is deflected can be further improved, so that the deflectable fixing portion 11 can be more easily deflected.

[0050] Fig. 7A 1 is a schematic diagram showing that the fixing portion 11 according to the example of the present disclosure abuts against the cap portion 21 . Figure 7B 1 is a schematic diagram showing that the fixing portion 11 according to the example of the present disclosure is deflected outward. Figure 7C 1 is a schematic diagram showing the automatic return of the fixing portion 11 according to the example of the present disclosure.

[0051] In some examples, the retaining mechanism 10 can be arranged along the assembly direction (see Fig. 7A When the fixing portion 11 in the holding mechanism 10 abuts against the guide surface 211 of the cap portion 21, the fixing portion 11 applies a force to the sharp object 20, and the sharp object 20 can apply a reaction force to the fixing portion 11 in the opposite direction of the force, so that the deflectable fixing portion 11 deflects outward (see Figure 7B ).

[0052] In some examples, when the sharp object 20 is assembled to a predetermined position, the fixing portion 11 can automatically return to its original position from the deflected state, and the retaining structure 111 in the fixing portion 11 can be located between the cap portion 21 and the main body portion 23 and abut against the lower surface of the cap portion 21 (see Figure 7C ). In some examples, when the sharp object 20 is assembled to the predetermined position, the upper end of the neck 22 can be in the same plane as the upper surface of the retaining structure 111. In this case, since the radial dimension of the neck 22 is smaller than the radial dimension of the cap 21, it is beneficial for the fixing portion 11 to automatically return from the deflected state and enable the retaining structure 111 to be located in the annular recess outside the neck 22 in the sharp portion, so that the sharp object 20 can be retained in the predetermined position by the fixing portion 11.

[0053] In some examples, the deflectable fixing portion 11 may be deformable relative to the central axis of the holding mechanism 10. In some examples, the deflectable fixing portion 11 may be made of a plastic material. In this case, the possibility of the deflectable fixing portion 11 breaking when it is bent or deformed by an external force can be reduced, thereby improving the assembly stability of the fixing portion 11 and the sharp object 20.

[0054] In some examples, the retaining mechanism 10 may include a restricting portion 12 (see Figure 3 ). In some examples, the limiting portion 12 may be configured to inhibit the sharp object 20 from rotating. In this case, by configuring the limiting portion 12 to inhibit the sharp object 20 from rotating, the sharp object 20 can be inhibited from deflecting or rotating relative to the limiting portion 12 in a moving or stationary state. When the application device 1 drives the holding mechanism 10 to move toward a target direction, the sharp object 20 can be aligned with the movement direction of the holding mechanism 10, thereby facilitating accurate application of the sharp object 20 to the target position.

[0055] In some examples, when the application device 1 pushes the holding mechanism 10 toward the distal end 102, the limiting portion 12 can abut against the upper surface of the main body 23. In this case, when the cap 21 pushes the fixing portion 11 outward and the fixing portion 11 continues to move toward the assembly direction, when the upper end of the neck 22 and the upper surface of the holding structure 111 are in the same plane, the fixing portion 11 can automatically return to the position so that the holding structure 111 abuts against the lower surface of the cap 21; the force of the application device 1 driving the holding mechanism 10 can be transmitted to the sharp object 20 via the limiting portion 12 to drive the sharp object 20 to move toward the distal end 102 together.

[0056] In some examples, the limiting portion 12 may contact at least two surfaces of the sharp object 20. In some examples, the two surfaces may not be in the same plane. In this case, at least two surfaces of the sharp object 20 that contact each other can form at least one prism-like structure 25 that fits the surface of the limiting portion 12, so that the relative deflection or rotation of the sharp object 20 can be limited by the limiting portion 12. In some examples, the sharp object 20 may have two surfaces that are not in the same plane (see Figure 2 The limiting portion 12 may have two surfaces that are in contact with the two surfaces that are not in the same plane (see Figure 3In the embodiment of the present invention, a prism-shaped structure 25 can be formed between surface a and surface b, and a sharp angle can be formed between surface c and surface d; during assembly, surface b can contact surface c, and surface a can contact surface d. In this case, the prism-shaped structure 25 formed by surface a and surface b can fit on the surface of the limiting portion 12 (i.e., fit on the sharp angle formed by surface c and surface d), so that the relative deflection or rotation of the sharp object 20 can be limited by the limiting portion 12.

[0057] In some examples, the number of surfaces on which the limiting portion 12 contacts the sharp object 20 may be 2, 3, 4 or more. In some examples, the surfaces on which the limiting portion 12 contacts the sharp object 20 may not be in the same plane. In this case, the surfaces on which the limiting portion 12 and the sharp object 20 contact each other and are adjacent and in contact with each other can form at least one prismatic structure 25, and the sharp object 20 can form at least one prismatic structure 25 that fits the surface of the limiting portion 12, so that the relative deflection or rotation of the sharp object 20 can be limited by the limiting portion 12.

[0058] In some examples, the sharp object 20 may be prism-shaped. For example, the sharp object 20 may be triangular prism-shaped, quadrangular prism-shaped, pentagonal prism-shaped, etc. In some examples, when the sharp object 20 is assembled with the fixing portion 11, the limiting portion 12 may surround at least two outer surfaces of the sharp object 20, and the shape formed by the inner surface of the limiting portion 12 may match the shape formed by the outer surface of the sharp object 20. In this case, the shape formed by the inner surface of the limiting portion 12 matches the shape formed by the outer surface of the sharp object 20, and the sharp object 20 is prism-shaped, which can inhibit the relative movement between the sharp object 20 and the limiting portion 12; in addition, it can facilitate the assembly of the holding mechanism 10 and the sharp object 20.

[0059] In some examples, the contact portion of two adjacent surfaces of at least two sharp objects 20 may form a prismatic structure 25, and the corners of the prismatic structure 25 may be rounded (see Figure 2 In this case, the rounded corner design can reduce the friction between the sharp object 20 and the limiting portion during the assembly process, thereby facilitating assembly.

[0060] In some examples, the applying device 1 may include a first limiting structure and a second limiting structure.

[0061] In some examples, the first limiting structure can be provided on the surface of the limiting portion 12 in contact with the sharp object 20, and the second limiting structure can be provided on the outer surface of the sharp object 20. In some examples, the first limiting structure and the second limiting structure can extend in a direction parallel to the central axis of the application device 1 (i.e., extend in the assembly direction). In some examples, when the sharp object 20 is retained in the retaining mechanism 10, the first limiting structure can be engaged with the second limiting structure. In this case, when the first limiting structure is engaged with the second limiting structure, the relative deflection or rotation between the sharp object 20 and the limiting portion 12 can be limited, thereby improving the stability of the sharp object 20 and the retaining mechanism 10 after assembly.

[0062] In some examples, the first limiting structure may be a groove or a protrusion, and the second limiting structure may be a groove or a protrusion opposite to the first limiting structure. In this case, the relative movement between the sharp object 20 and the limiting portion can be limited, which is beneficial to improving the stability of the sharp object 20 and the retaining mechanism 10 after assembly. In addition, when the retaining mechanism 10 and the sharp object 20 are assembled, it is necessary to first align the first limiting structure and the second limiting structure, and then assemble them along the assembly direction, thereby guiding the assembly direction, and at the same time, the structural strength and stability of the retaining mechanism 10 and the sharp object 20 after assembly can be improved through the structures that fit each other.

[0063] In some examples, the sharp object 20 may be cylindrical. In this case, when the sharp object 20 is assembled with the holding mechanism 10, the second limiting structure on the outer surface of the sharp object 20 can be engaged with the first limiting structure on the surface of the limiting portion 12, thereby suppressing the relative rotation or deflection between the cylindrical sharp object 20 and the holding mechanism 10, thereby facilitating the stability of the holding mechanism 10 in the process of pushing the cylindrical sharp object 20.

[0064] Figure 8 1 is a schematic projection diagram showing the main body 23 and the restriction portion 12 according to the example of the present disclosure.

[0065] In some examples, when projected along the central axis of the application device 1, the main body 23 and the limiting portion 12 may at least partially overlap. In other words, when a projection plane is set perpendicular to the central axis of the application device 1, the main body 23 and the limiting portion 12 may at least partially overlap. Figure 8 The projection of the main body 23 and the projection of the limiting portion 12 may have three overlapping parts ( Figure 8 The shaded parts S1, S2 and S3 in FIG. 1 can be represented as three overlapping parts). In some examples, see Figure 8 , Z may refer to the outer contour of the projection pattern of the main body portion 23 , and X may refer to the outer contour of the projection pattern of the limiting portion 12 .

[0066] In some examples, the area of ​​the overlapping portion may be not less than 20% of the total projected area of ​​the main body 23. In this case, the contact area between the main body 23 and the limiting portion 12 can be increased, which is beneficial for the holding mechanism 10 to transmit the force to the sharp object 20, so that the holding mechanism 10 can better push the sharp object 20 toward the distal end 102.

[0067] In some examples, the area of ​​the overlapping portion may account for 20%, 25%, 30%, 35%, 40% or 45% of the total projected area of ​​the main body 23. In this case, compared with the solution of not providing the limiting portion 12 but only providing a plurality of fixing portions 11 to clamp the sharp object 20, providing the limiting portion 12 can increase the contact area between the main body 23 and the limiting portion 12.

[0068] In some examples, the radial dimension of the main body 23 may be greater than the radial dimension of the cap 21. In this case, the area of ​​the overlapping portion can be increased by increasing the size of the limiting portion 12, which can facilitate the retention mechanism 10 to transmit the force to the sharp object 20, thereby improving the reliability of the application device 1 when pushing the sharp object 20 toward the distal end 102.

[0069] In some examples, the limiting portion 12 may have one or more contact surfaces with the sharp object 20 when assembled. In some examples, the fixing portion 11 may be one or more. In some examples, the limiting portion 12 and the fixing portion 11 may form a receiving cavity 13 for receiving the sharp object 20 (see Figure 3 ). In some examples, the receiving cavity 13 can receive the cap portion 21 of the sharp object 20.

[0070] In some examples, the fixing portion 11 may be one, and the limiting portion 12 may have multiple contact surfaces with the sharp object 20 when assembled. In some examples, the number of contact surfaces between the limiting portion 12 and the sharp object 20 when assembled may be 2, 3, 4 or more. This facilitates the formation of the accommodating cavity 13.

[0071] In some examples, the limiting portion 12 may have a contact surface with the sharp object 20 when assembled, and the fixing portion 11 may be multiple. In some examples, the number of the fixing portions 11 may be 2, 3, 4 or more. Thus, it is beneficial to form the accommodating cavity 13.

[0072] In some examples, preferably, the accommodating cavity 13 and the sharp object 20 can be clearance fit. In this case, compared with interference fit, the clearance fit between the accommodating cavity 13 and the sharp object 20 can maintain the stability of the two after assembly, and can reduce the friction between the two during the assembly process, so as to facilitate assembly.

[0073] In some examples, the receiving cavity 13 and the sharp object 20 may be interference fit. In this case, compared with clearance fit, the interference fit between the receiving cavity 13 and the sharp object 20 can further maintain the stability of the two after assembly, and can further inhibit the relative rotation of the sharp object 20 relative to the holding mechanism 10.

[0074] In some examples, the application device 1 may include a sharp object 20 and a holding mechanism 10 for holding the sharp object 20. The holding mechanism 10 may include a deflectable fixing portion 11 and a limiting portion 12. The sharp object 20 may include a cap portion 21. The fixing portion 11 may have a holding structure 111 for holding the sharp object 20. During the assembly of the sharp object 20 and the holding mechanism 10, the upper surface of the cap portion 21 may contact the holding structure 111 and deflect the fixing portion 11 away from the central axis of the holding mechanism 10. When the sharp object 20 is assembled to a predetermined position, the fixing portion 11 may automatically return to its original position so that the holding structure 111 contacts the lower surface of the cap portion 21 to fix the sharp object 20. The limiting portion 12 may be configured to inhibit the sharp object 20 from rotating.

[0075] In this case, by configuring the limiting portion 12 to inhibit the sharp object 20 from rotating, the sharp object 20 can be inhibited from shifting or rotating relative to the limiting portion 12 in motion or at rest. When the applying device 1 drives the retaining mechanism 10 to move in the target direction, the movement direction of the sharp object 20 can be consistent with that of the retaining mechanism 10, thereby facilitating accurate application of the sharp object 20 to the target position.

[0076] In summary, the first aspect of the present disclosure can provide an application device 1 with high reliability.

[0077] The second aspect of the present disclosure also relates to a holding mechanism 10 for a sharp object 20 (hereinafter referred to as the holding mechanism 10). The holding mechanism 10 for a sharp object 20 of the second aspect of the present disclosure can hold the sharp object 20 while suppressing the sharp object 20 from rotating or deflecting relative to the holding mechanism 10.

[0078] In some examples, the retaining mechanism 10 may include a deflectable fixing portion 11 and a restricting portion 12 .

[0079] In some examples, the sharp object 20 may include a cap 21. In some examples, the fixing portion 11 may have a retaining structure 111 for retaining the sharp object 20. In some examples, during the assembly of the sharp object 20 with the retaining mechanism 10, the upper surface of the cap 21 may contact the retaining structure 111 and deflect the fixing portion 11 away from the central axis of the retaining mechanism 10. In some examples, when the sharp object 20 is assembled to a predetermined position, the fixing portion 11 may automatically return to the position so that the retaining structure 111 contacts the lower surface of the cap 21 to fix the sharp object 20. In some examples, the limiting portion 12 may be configured to inhibit the sharp object 20 from rotating. In this case, by configuring the limiting portion 12 to inhibit the sharp object 20 from rotating, the sharp object 20 can be inhibited from deflecting or rotating relative to the limiting portion 12 in a moving or stationary state, and the sharp object 20 can be made to move in the same direction as the retaining mechanism 10 of the sharp object 20, thereby facilitating the retaining mechanism 10 of the sharp object 20 to accurately transport the sharp object 20 to the target position.

[0080] The retaining mechanism 10 and the sharp object 20 involved in the second aspect of the present disclosure are consistent with the disclosed contents of the retaining mechanism 10 and the sharp object 20 involved in the first aspect of the present disclosure. For details, please refer to the description of the retaining mechanism 10 and the sharp object 20 in the first aspect of the present disclosure, which will not be repeated here.

[0081] In summary, the second aspect of the present disclosure can provide a holding mechanism 10 for a sharp object 20 with high reliability.

[0082] In the present disclosure, it is possible to provide an application device 1 and a holding mechanism 10 for a sharp object 20 having high reliability.

[0083] Although the present disclosure is specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the above description does not limit the present disclosure in any form. Those skilled in the art may modify and change the present disclosure as needed without departing from the essential spirit and scope of the present disclosure, and these modifications and changes all fall within the scope of the present disclosure.

Claims

1. An application device, It is characterized in that The applying device comprises a sharp object, a holding mechanism for holding the sharp object, the holding mechanism comprises a deflectable fixing portion and a limiting portion, the sharp object comprises a cap portion, The fixing portion has a holding structure for holding the sharp object. During the process of assembling the sharp object and the holding mechanism, the upper surface of the cap portion contacts the holding structure and causes the fixing portion to deflect away from the central axis of the holding mechanism. When the sharp object is assembled to a predetermined position, the fixing portion automatically returns to a position so that the holding structure contacts the lower surface of the cap portion to fix the sharp object. The restriction portion is configured to inhibit the sharp object from rotating.

2. The application device according to claim 1, It is characterized in that The sharp object further comprises a neck and a main body, wherein the main body is connected to the cap via the neck, and the radial dimension of the neck is smaller than the radial dimension of the cap. The applying device comprises a proximal end and a distal end having an opening, and when the applying device pushes the holding mechanism toward the distal end, the limiting portion abuts against the upper surface of the main body.

3. The application device according to claim 2, It is characterized in that Projected along the direction of the central axis of the applying device, the main body portion and the limiting portion at least partially overlap, and the area of ​​the overlapping portion is not less than 20% of the total projected area of ​​the main body portion.

4. The application device according to claim 2, It is characterized in that The main body is provided with a hollow structure or a recessed structure recessed inwardly from the outer surface of the main body.

5. The application device according to claim 1, It is characterized in that The limiting portion contacts at least two surfaces of the sharp object, and the two surfaces are not in the same plane.

6. The application device according to claim 1, It is characterized in that The applying device includes a first limiting structure and a second limiting structure, the first limiting structure is arranged on the surface where the limiting portion contacts the sharp object, and the second limiting structure is arranged on the outer surface of the sharp object, the first limiting structure and the second limiting structure extend in a direction parallel to the central axis of the applying device, and when the sharp object is held in the holding mechanism, the first limiting structure is engaged with the second limiting structure.

7. The application device according to claim 1, It is characterized in that The cap portion has a guide surface, and during the assembly process of the sharp object and the fixing portion, the guide surface contacts the retaining structure to guide the fixing portion to deflect outward.

8. The application device according to claim 7, It is characterized in that During the assembly process of the sharp object and the fixing portion, the contact surface between the retaining structure and the guide surface is an inclined surface or a curved surface.

9. The application device according to claim 1, It is characterized in that The limiting portion and the sharp object have one or more contact surfaces when assembled, the fixing portion is one or more, the limiting portion and the fixing portion form a receiving cavity for receiving the sharp object, and the receiving cavity and the sharp object are clearance-matched.

10. A sharp object holding mechanism, It is characterized in that The holding mechanism includes a deflectable fixing portion and a limiting portion, and the sharp object includes a cap portion. The fixing portion has a holding structure for holding the sharp object. During the process of assembling the sharp object and the holding mechanism, the upper surface of the cap portion contacts the holding structure and causes the fixing portion to deflect away from the central axis of the holding mechanism. When the sharp object is assembled to a predetermined position, the fixing portion automatically returns to a position so that the holding structure contacts the lower surface of the cap portion to fix the sharp object. The restriction portion is configured to inhibit the sharp object from rotating.

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