CN101664312B - Adjustable accessories for piercing devices - Google Patents

Abstract

The application is an adjustable fitting for a lancing device. The adjustable fitting includes a holder, a cover, a rotating assembly, and an inner member; wherein, the cover covers the outer side of one end of the holding piece and is engaged with the holding piece, and the cover can rotate relative to the holding piece but does not move back and forth relative to the holding piece; the rotating component is positioned in the holding piece and the cover and is meshed with the cover, and when the cover is rotated, the rotating component rotates along with the cover but does not move back and forth; the inner member is located inside the holder, the cover and the rotating assembly and is engaged with the holder and the rotating assembly, respectively, and when the rotating assembly rotates with the cover, the inner member rotates with the rotating assembly and moves back and forth in the holder and the cover.

Description

Adjustable accessories for piercing devices

technical field

The present application relates to an adjustable accessory, in particular to an adjustable accessory for adjusting the puncture depth of a puncture needle. the

Background technique

In many medical examination procedures used today only relatively small blood samples (approximately 5-50 μL) are required, and such small samples can usually be obtained by incision or puncture of the skin at a selected site, such as a finger, Then collect 1-2 drops of blood. With the popularization of household testing instruments such as self-monitoring of blood sugar, there is a demand for simple and safe blood collection by the subjects themselves. the

A conventional puncture needle generally has a hard body and a sterile puncture component, such as a needle, which protrudes from one end of the body; the puncture needle is used to pierce the skin so that a blood sample can be collected from the formed puncture wound. Blood is usually collected from the fingertips, as this is the most plentiful source; however, blood can also be collected from other sites, such as the earlobe or extremities. the

In order to reduce the user's anxiety when piercing the skin and ensure the reproducibility of the piercing results, various piercing devices equipped with springs have been developed. At the same time, in order to match the skin thickness of different patients or different blood collection sites, many puncture devices also provide designs with adjustable puncture depths. the

Please refer to FIGS. 1A-1B , which are schematic diagrams of a puncturing device with adjustable puncturing depth in the prior art. As shown in FIG. 1A , a puncture device 10 with adjustable puncture depth generally has a holder 11 , a rotatable cover 12 and a puncture assembly 13 , wherein the holder 11 is used for fixing with the main body 101 of the puncture device 10 , and the puncture Assembly 13 is located in the holder 11 and the main body 101, and the cover 12 covers the outside of one end of the holder 11, and has an opening 122 to resist the site to be punctured, the puncture assembly 13 has a bracket 131 and Puncture needle tip 132 . When the puncture assembly 13 is pushed by a spring (not shown) to move in the puncture direction P, the bracket 131 is blocked by the stop surface 112 of the retainer 11, and only the puncture needle tip 132 will extend through the opening 122. At this time, the length of the puncture needle point 132 protruding from the cover 12 is D1, which is also the depth at which the puncture device 10 can puncture into the skin. the

As shown in FIG. 1B, the holder 11 and the cover 12 of the puncture device 10 have corresponding thread structures 111, 121 respectively, so the cover 12 can move to the puncture direction P by rotating, so that the holder The distance between the stop surface 112 of 11 and the opening 122 of the cover 12 increases; since the relative position between the puncture assembly 13 and the holder 11 remains unchanged, the movement of the cover 12 to the puncture direction P The length by which the puncture needle tip 132 protrudes from the cover 12 is shortened to D2, and thus the puncture depth of the puncture device 10 into the skin will also become shallower. the

However, such a design makes the puncturing device 10 adjust the depth to be punctured, a gap I (as shown in FIG. If the cover 12 is disassembled and cleaned, it is easy to cause damage or loss of parts. In addition, when the cover 12 is to be adjusted back from the position shown in FIG. 1B to the position shown in FIG. 1A , the user may be injured by holding the cover 12 at the gap I during the adjustment. the

To sum up, the industry urgently needs an accessory that can adjust the puncture depth of the puncture device, so that when the user adjusts the depth to be punctured, the cover of the puncture device will not move back and forth, which not only reduces the accumulation of dirt in the gaps of the puncture device The opportunity also provides another option in the design of the piercing device. the

Contents of the invention

Therefore, in view of the shortcomings of the known technology, the applicant invented the "adjustable accessory of the piercing device" of the present application to improve the shortcomings of the above-mentioned common methods. the

The main purpose of this application is to provide an adjustable accessory for a puncture device to adjust the puncture depth of the puncture device, and the adjustable accessory will not form a gap between components during use, thereby reducing the accumulation of dirt in the puncture device The opportunity in the crevice also provides another option in the design of the piercing device.

According to the idea of the present invention, the present invention provides an adjustable accessory of a piercing device. The adjustable accessory includes a holder, a cover, a rotating assembly and an internal component; wherein, the cover wraps the outside of one end of the holder and engages with it, and the cover can rotate relative to the holder but not Relatively move back and forth; the rotating assembly is located in the holder and the cover, and is engaged with the cover. When the cover is turned, the rotating assembly will rotate with the cover but not move forward and backward; the internal component is located in the holding part, the cover and the inner side of the rotating assembly, and are respectively engaged with the holder and the rotating assembly, when the rotating assembly rotates with the cover, the inner member will rotate with the rotating assembly and in the holder and move back and forth within the cover. the

As described in the adjustable accessory, wherein the holder includes a first annular engagement structure, the cover includes a second annular engagement structure, and the cover and the holder are engaged by the first and second annular engagement structures, so that the cover Relative rotation is possible with the holder but no relative back and forth movement is possible. the

As described in the adjustable accessory, wherein the cover further includes a first engaging structure, and the rotating assembly further includes a second engaging structure, and the cover and the rotating assembly are engaged through the first and second engaging structures, wherein the first and the second engagement structure is one of a circular engagement structure, an elongated engagement structure and a square engagement structure, so that when the cover is rotated, the rotating assembly will rotate with the cover but not move back and forth. the

As described in the adjustable accessory, wherein when the first engaging structure is a concave structure, the second engaging structure is a protruding structure, and when the first engaging structure is a protruding structure, the second engaging structure is a concave structure. the

The adjustable accessory, wherein the rotating assembly includes a first elongated engagement structure, the inner member includes a second elongated engagement structure, the rotating assembly and the inner member are connected by the first and second elongated engagement structures Engaged so that when the rotating assembly rotates with the cover, the inner member will rotate with the rotating assembly. the

As described in the adjustable accessory, wherein the holder further includes a pawl, and the internal member further includes a threaded structure, and the holder and the internal member are engaged by the detent and the threaded structure, so that the internal member will rotate when it is rotated. Simultaneously move back and forth within the holder and the cover. the

As described in the adjustable accessory, wherein the holder further includes a wave-shaped groove, the rotating component further includes a circular protrusion, and the holder and the rotating assembly are connected through the wave-shaped groove and the circular protrusion. engage. the

An adjustable fitting as described, wherein the cover is made of a transparent material, the rotating assembly includes a scale marked on its outer surface, and the end of the holder covered by the cover has a window so that the scale can pass through the cover And the window is observed. the

According to the idea of the present invention, the application further provides a method for adjusting the puncture depth of the puncture device, the steps of which include providing a holder; providing a cover covering the outside of one end of the holder, and the cover can be combined with the holder performing relative rotation but not relative back and forth movement; providing an internal member positioned within and engaging the cover and the holder, respectively; and rotating the cover such that the internal member is in the holder and move back and forth within the cover. the

According to the idea of the present invention, the present application further provides another adjustable accessory of a puncture device, which includes a holder, a cover and an internal component. Wherein, the cover wraps the outer side of one end of the holder and engages with it, and the cover can rotate relative to the holder but not move back and forth relatively; the internal component is located inside the holder and the cover , and engage with the cover and the holder respectively, wherein, when the cover is rotated, the internal member will rotate with the cover and move back and forth in the holder and the cover. the

An adjustable accessory as described, wherein the cover includes a first elongate engagement structure, the inner member includes a second elongate engagement structure, the cover and the inner member are engaged by the first and second elongate engagement structures, Such that when the cover is turned, the internal member will turn with the cover. the

The adjustable accessory, wherein when the first elongated engagement structure is an elongated groove, the second elongated engagement structure is an elongated protrusion, and when the first elongated engagement structure is an elongated protrusion , the second elongated engagement structure is an elongated groove. the

As described in the adjustable accessory, wherein the holder includes a first annular engagement structure, the cover includes a second annular engagement structure, and the cover and the holder are engaged by the first and second annular engagement structures, so that the cover Relative rotation is possible with the holder but no relative back and forth movement is possible. the

As described in the adjustable accessory, wherein when the first annular engagement structure is an annular groove, the second annular engagement structure is an annular protrusion, and when the first annular engagement structure is an annular protrusion, the second annular engagement The structure is an annular groove. the

As described in the adjustable accessory, wherein the holder further includes a pawl, and the internal member further includes a threaded structure, and the holder and the internal member are engaged by the pawl and the threaded structure, so that the internal member rotates will move back and forth within the holder and the cover simultaneously. the

As the adjustable fitting, the thread structure is a wavy thread structure. the

As described in the adjustable fitting, wherein the holder further includes a threaded structure, and the inner member further includes a detent, and the holder and the inner member are engaged by the threaded structure and the detent, so that when the inner member is rotated, it will Simultaneously move back and forth within the holder and the cover. the

As described in the adjustable accessory, wherein the holder further includes a buckle structure, and the holder is fixed to the main body of the puncture device through the buckle structure. the

As described in the adjustable accessory, wherein the cover further includes a rotation assembly, the rotation assembly is located between the retainer and the inner member, and the cover engages with the inner member through the rotation assembly. the

The adjustable accessory, wherein the cover is made of one of transparent material, translucent material and opaque material. the

Description of drawings

1A-1B are schematic diagrams of a puncturing device with adjustable puncturing depth in the prior art. the

Fig. 2 is an exploded perspective view of the adjustable accessory of the piercing device according to the first preferred embodiment of the present application. the

3A-3C are respectively a schematic perspective view, a side view and a cross-sectional view of the holder of the adjustable accessory according to the first preferred embodiment of the present application. the

Fig. 4 is a sectional view of the cover of the adjustable accessory of the first preferred embodiment of the present application. the

5A-5B are respectively a three-dimensional schematic view and a cross-sectional view of the rotating assembly of the adjustable accessory according to the first preferred embodiment of the present application. the

6A-6B are respectively a perspective view and a side view of the internal structure of the adjustable accessory according to the first preferred embodiment of the present application. the

7A-7B are cross-sectional views of the adjustable accessories of the piercing device according to the first preferred embodiment of the present application. the

8A-8C are side views of the adjustable fitting of the piercing device of the first preferred embodiment of the present application. the

Fig. 9 is a three-dimensional exploded view of the adjustable accessory of the puncturing device according to the second preferred embodiment of the present application. the

10A-10C are schematic perspective views, side views and cross-sectional views of the holder of the adjustable accessory according to the second preferred embodiment of the present application. the

Fig. 11 is a sectional view of the cover of the adjustable accessory of the second preferred embodiment of the present application. the

12A-12B are schematic perspective views and side views of the internal components of the adjustable accessory according to the second preferred embodiment of the present application. the

13A-13B are cross-sectional views of the adjustable accessory of the piercing device according to the second preferred embodiment of the present application. the

14A-14C are side views of the adjustable fitting of the piercing device of the second preferred embodiment of the present application. the

Detailed ways

The following describes the preferred embodiments of the adjustable accessories of the puncture device of the present application, please refer to the accompanying drawings, but in fact its configuration and implemented methods do not necessarily fully comply with the described content, and those skilled in the art should be able to Various changes and modifications may be made without departing from the true spirit and scope of the application. the

Please refer to FIG. 2 , which is an exploded perspective view of the adjustable accessory of the puncture device according to the first preferred embodiment of the present application; Wherein, after the adjustable accessory 20 is combined, the front end 216 of the holder 21 will be wrapped in the cover 22, and the internal member 24 is set on the rotating assembly 23 at the same time after the rotating assembly 23 is put on first. The holder 21 and the cover 22 are inside. the

Please refer to FIGS. 3A-3B , which are respectively a three-dimensional schematic view and a side view of the holder 21 of the adjustable accessory 20; Located at the front end 216 . Please refer to FIG. 3C, which is a cross-sectional view of the retainer 21 shown in FIG. 3B along the A-A section; wherein, the inner side of the retainer 21 has a pawl 212 and a buckle structure 214, and the buckle structure 214 is used to place the The holder 21 is fixed to the main body of the puncture device (not shown in the figure). the

Please refer to FIG. 4 , which is a sectional view of the cover 22 of the adjustable fitting 20 along the B-B section; wherein the cover 22 includes an annular engagement structure 221, an opening 222 and a square protruding engagement structure 223, and the opening 222 is used for piercing The puncture needle point of the assembly protrudes (not shown in the figure), and the annular engagement structure 221 of the cover 22 is used to engage with the annular engagement structure 211 of the holder 21 (please cooperate with FIGS. 3A-3C ), through The meshing of the ring-shaped engaging structures 211 and 221 enables the holder 21 and the cover 22 to rotate relative to each other but not to move back and forth relative to each other. In addition, as shown in Figures 3A-3C and Figure 4, when the annular engagement structure 211 of the holder 21 is an annular protrusion, the annular engagement structure 221 of the cover 22 is an annular groove; The annular engaging structure 211 of the holder 21 is designed as an annular groove, and the annular engaging structure 221 of the cover 22 is configured as an annular protrusion. the

Please refer to FIG. 5A , which is a three-dimensional schematic diagram of the rotating assembly 23 of the adjustable accessory 20; wherein the rotating assembly 23 includes a scale 232, a circular protrusion 235 and a square groove engaging structure 233, and the square groove engaging structure 233 It is used to engage with the square protruding engaging structure 223 of the cover 22 (please refer to FIG. 4 ), so that when the user turns the cover 22, the rotating assembly 23 will rotate along with the cover but not move back and forth. In addition, the square protruding engaging structure 223 and the square groove engaging structure 233 can also be designed in other shapes, such as circular or elongated; on the other hand, the protruding engaging structure can also be arranged on the rotating assembly , and the groove engaging structure is provided on the cover. The circular protrusion 235 is used to engage with the wave-shaped groove 215 of the holder 21, so that when the user rotates the cover 22 and drives the rotation of the rotating assembly 23, the circular protrusion 235 and the The mutual cooperation of the wave-shaped grooves 215 can provide a hand feeling when turning, and then clearly adjust the puncture depth. Please refer to FIG. 5B , which is a sectional view of the rotating assembly 23 along section C-C, wherein, the inner side of the rotating assembly 23 further has an elongated engaging structure 231 . the

Please refer to FIGS. 6A-6B , which are a perspective view and a side view of the internal member 24 of the adjustable accessory 20 respectively; The elongated engaging structure 241 of the internal member 24 is used to engage with the elongated engaging structure 231 of the rotating assembly 23 (please cooperate with FIG. 5B ), so that when the rotating assembly 23 rotates with the cover 22, the internal The member 24 will rotate with the rotating assembly 23; the threaded structure 242 is used to engage with the pawl 212 inside the holder 21 (please cooperate with FIG. 3C), so the internal member 24 can follow the track of the threaded structure 242 Rotate and move back and forth in the holder 21 at the same time. In addition, as shown in FIG. 5B and FIGS. 6A-6B , when the elongated engagement structure 231 of the rotating assembly 23 is an elongated groove, the elongated engagement structure 241 of the inner member 24 is an elongated protrusion; and In the present invention, the elongated engagement structure 231 of the rotating assembly 23 can also be designed as an elongated protrusion, and the elongated engagement structure 241 of the inner member 24 is an elongated groove. Likewise, as shown in FIG. 3C and FIGS. 6A-6B , in the embodiment of the present application, the pawl is arranged on the holder 21 , and the thread structure is arranged on the inner member 24 . However, in the present invention, the ratchet can also be arranged on the inner member 24, and the threaded structure can be arranged on the retainer 21; in addition, the engagement mode of the retainer 21 and the inner member 24 is not limited to using the ratchet to engage with the threaded structure, It can also be designed to engage with two corresponding thread structures. the

Please refer to FIGS. 7A-7B , which are sectional views of the adjustable accessory 20 of the puncture device of the present application; as shown in the figure, the adjustable accessory 20 includes the holder 21, the cover 22, the rotating assembly 23 and the Internals 24. The holder 21 and the cover 22 are engaged by the ring-shaped engaging structures 211 , 221 , so that the holder 21 and the cover 22 can rotate relative to each other but cannot move back and forth relative to each other. The rotating component 23 is engaged with the cover 22, so that the rotating component 23 can be driven to rotate when the cover 22 rotates, and the rotating component 23 is further engaged with the internal member 24 through the elongated engaging structures 231, 241, and then Drive the rotation of the inner member 24 . The inner member 24 is further engaged with the holder 21 through the thread structure 242 and the pawl 212 , so when the inner member 24 rotates along the track of the thread structure 242 , it can move back and forth simultaneously. the

On the other hand, when the piercing assembly 13 is pushed by a spring (not shown) to move toward the piercing direction P, the bracket 131 of the piercing assembly 13 will be blocked by the stop surface 243 of the internal member 24, and only the piercing The needle tip 132 protrudes out of the cover 22 through the opening 222 of the cover 22 . Therefore, when the internal member 24 moves toward the puncturing direction P, the distance between the stop surface 243 and the opening 222 will become shorter, and the length of the puncture needle tip 132 that can protrude from the cover 22 will also become longer. Then the puncture depth will also become deeper. the

Please refer to FIGS. 8A-8C , which are side views of the adjustable accessory 20 of the piercing device of the present application. Wherein, when the cover 22 is made of transparent or translucent material, after the adjustable accessory 20 is combined, the user can see through the transparent or translucent cover 22 and the window 213 of the holder 21 The scale 232 located on the rotating assembly 23 ; when the cover 22 is rotated, since the rotating assembly 23 will also rotate accordingly, it can be seen that the position of the scale 232 will also change accordingly. Therefore, the scale 232 can be designed as a mark indicating the puncture depth, so that the user can know the puncture depth immediately. the

Please refer to FIG. 9 , which is an exploded perspective view of the adjustable accessory of the puncture device according to the second preferred embodiment of the present application; the adjustable accessory 30 includes a holder 31 , a cover 32 and an internal component 34 . Wherein, after the adjustable accessory 30 is combined, the front end 316 of the retainer 31 will be wrapped in the cover 32 , and the internal component 34 is disposed in the retainer 31 and the cover 32 . the

Please refer to FIGS. 10A-10B , which are respectively a perspective view and a side view of the holder 31 of the adjustable accessory 30 ; the holder 31 includes an annular engaging structure 311 . Please refer to FIG. 10C , which is a cross-sectional view of the holder 31 shown in FIG. 10B along the A-A section; wherein, the inside of the holder 31 has a pawl 312 and a buckle structure 314, and the buckle structure 314 is used for the The holder 31 is fixed to the main body of the puncture device (not shown in the figure). the

Please refer to FIG. 11 , which is a sectional view of the cover 32 of the adjustable fitting 30 along the section B-B; wherein the cover 32 includes an annular engaging structure 321, an opening 322 and an elongated engaging structure 323, and the opening 322 is used to make the piercing assembly The puncture needle point protrudes (not shown in the figure), and the annular engagement structure 321 of the cover 32 is used to engage with the annular engagement structure 311 of the holder 31 (please cooperate with Fig. 10A-10C), through the The meshing of the ring-shaped engaging structures 311 and 321 enables the holder 31 and the cover 32 to rotate relative to each other but cannot move back and forth relative to each other. In addition, as shown in Figures 10A-10C and Figure 11, when the annular engagement structure 311 of the holder 31 is an annular protrusion, the annular engagement structure 321 of the cover 32 is an annular groove; The annular engaging structure 311 of the holder 31 is configured as an annular groove, and the annular engaging structure 321 of the cover 32 is configured as an annular protrusion. the

Please refer to FIGS. 12A-12B , which are a perspective view and a side view of the internal member 34 of the adjustable accessory 30 respectively; The elongated engaging structure 341 of the internal member 34 is used to engage with the elongated engaging structure 323 of the cover 32 (please cooperate with FIG. 11 ), so that when the cover 32 is rotated, the internal member 34 will rotate thereupon; The threaded structure 342 is used to engage with the pawl 312 inside the holder 31 (please cooperate with FIG. 10C ), so when the internal member 34 rotates along the track of the threaded structure 342, it can also be on the holder at the same time. Move back and forth within 31. In addition, as shown in Figure 11 and Figures 12A-12B, when the elongated engaging structure 323 of the cover 32 is an elongated groove, the elongated engaging structure 341 of the inner member 34 is an elongated protrusion; and this In the invention, the elongated engagement structure 323 of the cover 32 can also be designed as an elongated protrusion, and the elongated engagement structure 341 of the inner member 34 is an elongated groove. Similarly, as shown in Figure 10C and Figures 12A-12B, in the embodiment of the present application, the pawl is arranged on the holder 31, and the thread structure is arranged on the internal member 34; but the present invention can also arrange the pawl On the inner component 34 a threaded structure is provided on the holder 31 . In addition, the thread structure 342 can be designed as a wavy thread structure, which can not only engage with the pawl 312, but also provide a hand feeling during rotation, thereby clearly adjusting the puncture depth. In addition, the engagement method of the retainer 31 and the internal member 34 is not limited to using the pawl to engage with the threaded structure, and it can also be designed to use two corresponding threaded structures to engage, and these two corresponding threaded structures can also be designed The wavy thread structure can also provide a feel when turning for clear positioning. the

Please refer to FIGS. 13A-13B , which are cross-sectional views of the adjustable accessory 30 of the piercing device of the present application; The holder 31 and the cover 32 are engaged by the ring-shaped engaging structures 311 , 321 , so that the holder 31 and the cover 32 can rotate relative to each other but cannot move back and forth relative to each other. The cover 32 is further engaged with the inner member 34 through the elongated engaging structures 323 , 341 , so that when the cover 32 is rotated, the inner member 34 will be rotated accordingly. The inner member 34 is further engaged with the holder 31 through the thread structure 342 and the pawl 312 , so when the inner member 34 rotates along the track of the thread structure 342 , it can move back and forth simultaneously. the

On the other hand, when the piercing assembly 13 is pushed by a spring (not shown) to move toward the piercing direction P, the bracket 131 of the piercing assembly 13 will be blocked by the stop surface 343 of the inner member 34, and only the piercing The needle tip 132 protrudes out of the cover 32 through the opening 322 of the cover 32 . Therefore, when the internal member 34 moves toward the puncturing direction P, the distance between the stop surface 343 and the opening 322 will become shorter, and the length of the puncture needle tip 132 that can protrude from the cover 22 will also become longer. Then the puncture depth will also become deeper.

Please refer to FIGS. 14A-14C , which are side views of the adjustable accessory 30 of the piercing device of the present application. Wherein, when the cover 32 is made of a transparent or translucent or opaque material, markings can be made on the cover 32 and the holder 31. After the adjustable accessory 30 is combined, the user can pass through the transparent or semi-transparent material. The transparent or opaque markings on the cover 32 and the holder 31 allow the user to immediately know the puncture depth. the

To sum up, the adjustable accessory of the puncture device of the present application provides a design different from that of the prior art. It does not directly change the position of the cover to adjust the puncture depth of the puncture device, but adjusts the extension of the puncture assembly by moving the internal components. Because of the length of the cover, no gap will be formed between the cover and other components of the puncture assembly, which not only reduces the chance of dirt accumulating in the gap, but also provides another choice in the design of the puncture device. Therefore, the present application is obviously superior to various known technologies existing at present, and is an invention of great industrial value. the

The above-mentioned embodiments are only examples for convenience of description, and various changes and modifications may be made by those skilled in the art without departing from the scope of protection of the appended claims.

Claims (9)

1. An adjustable accessory of a puncturing device, comprising: The retainer includes a pawl, and one end of the retainer also forms a first annular engagement structure; A cover, which covers the outer side of one end of the holder and has a second ring-shaped engagement structure engaged with the first ring-shaped engagement structure provided on the holder, so that the cover can rotate relative to the holder But without relative back and forth movement, the cover also includes a first engagement structure; a rotating assembly, which is located in the holder and the cover, and has a second engagement structure and engages with the first engagement structure of the cover, when the cover is rotated, the rotation assembly will follow the the cover rotates but does not move back and forth, and the rotating assembly is provided with a first elongated engagement structure; and An internal member, which is located inside the retainer, the cover and the rotating assembly, the internal member also forms a second elongated engaging structure and a thread structure and is respectively connected to the first elongated engaging structure of the rotating assembly The engagement structure and the pawl of the holder are engaged, wherein when the rotating assembly rotates with the cover, the internal member will rotate with the rotating assembly and between the holder and the cover Move back and forth inside. 2. The adjustable accessory of claim 1, wherein: The first engaging structure and the second engaging structure are one of a circular engaging structure, an elongated engaging structure and a square engaging structure, so that when the cover is turned, the rotating assembly will rotate with the cover but not move back and forth; and When the first engaging structure is a concave structure, the second engaging structure is a protruding structure, and when the first engaging structure is a protruding structure, the second engaging structure is a concave structure. 3. The adjustable accessory of claim 1, wherein: The holder further includes a wave-shaped groove, the rotating assembly further includes a circular protrusion, and the holder and the rotating assembly engage with the circular protrusion through the wave-shaped groove; and/or The cover is made of transparent material, the rotating assembly includes a scale marked on its outer surface, and the end of the holder covered by the cover has a window so that the scale can pass through the cover and The window is observed. 4. An adjustable accessory for a piercing device, comprising: The retainer includes a pawl, and one end of the retainer forms a first annular engagement structure; A cover, which covers the outer side of one end of the holder and forms a second ring-shaped engagement structure to engage with the first ring-shaped engagement structure of the holder, so that the cover can rotate relative to the holder. no relative back and forth movement, wherein the cover includes a first elongated engagement structure; and an internal member located within the retainer and the cover, the internal member comprising a second elongated engagement structure and a threaded structure, and respectively engaging the first elongated engagement structure of the cover and the retainer The detents are engaged whereby, when the cover is turned, the inner member will rotate with the cover and move back and forth within the holder and the cover. 5. The adjustable accessory of claim 4, wherein: When the first elongated engagement structure is an elongated groove, the second elongated engagement structure is an elongated protrusion, and when the first elongated engagement structure is an elongated protrusion, the second elongated engagement structure is an elongated protrusion. The elongated engaging structure is an elongated groove. 6. The adjustable accessory of claim 4, wherein: When the first annular engagement structure is an annular groove, the second annular engagement structure is an annular protrusion; when the first annular engagement structure is an annular protrusion, the second annular engagement structure is an annular recess groove. 7. The adjustable accessory of claim 4, wherein: The thread structure is a wavy thread structure. 8. The adjustable accessory of claim 4, wherein The holder further includes a buckle structure, and the holder is fixed to the main body of the puncture device through the buckle structure. 9. The adjustable accessory of claim 4, wherein: The cover is made of one of transparent material, translucent material and opaque material.

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