CN117042689A

CN117042689A - Replacement blood collection device

Info

Publication number: CN117042689A
Application number: CN202280020844.5A
Authority: CN
Inventors: 崔任喆
Original assignee: Ron Virtue Co ltd
Current assignee: Ron Virtue Co ltd
Priority date: 2021-01-12
Filing date: 2022-01-12
Publication date: 2023-11-10

Abstract

The replaceable blood collection device according to the present invention allows a needle unit including a needle carrier and a tip slider to be inserted into a tubular syringe and used, and a used needle unit or needle carrier can be replaced to reuse the device. Replaceable blood collection devices reduce discarded components during reuse and thus minimize waste of resources. In addition, the retractable retaining component provided at the tip slider facilitates assembly and disassembly of the tip slider inserted into the needle barrel. In addition, the blood collection device may have a driving spring and a rear end cover, the driving spring is used to elastically push the needle carrier in the forward direction, and the rear end cover is used to support the driving spring so that the spring is compressed in the rear end cover, thereby Generates elastic force, so the blood collection operation can be performed with the help of the elastic force of the spring.

Description

Replacement type blood collection device

Technical Field

The present disclosure relates to a replaceable lancet device.

Background

A lancet device is used to withdraw a small amount of blood from a portion of the body to perform tests such as blood typing and blood glucose measurement.

In general, a general lancet device includes a tubular cylinder loaded with a needle carrier having a needle, and the loaded needle carrier is elastically ejected so that the needle can pierce the skin to withdraw a very small amount of blood. Once used, the needle carrier may be replaced by disassembling the front end of the needle carrier or removing the entire needle carrier to prevent infection from repeated use.

However, the manufacturing costs may increase due to the complicated structure and many parts required for attaching/detaching the needle carrier and the needle unit including the needle carrier, so that such a lancet device has a problem of low economical efficiency.

In addition, since components are frequently damaged or lost and are difficult to assemble during the replacement of the needle carrier and the needle unit, there is also a problem in that the lancet device is inconvenient for the elderly user to use.

Disclosure of Invention

Technical problem

An aspect of the present disclosure is to provide a lancet device in which a needle unit can be easily replaced by an intuitive and simple detachable structure.

Another aspect of the present disclosure is to provide a lancet device including a needle unit in which shaking occurring due to locking and releasing of the needle unit during blood collection is minimized.

It is still another aspect of the present disclosure to provide a lancet device having a function of adjusting a depth of a needle inserted into a epidermis.

It is yet another aspect of the present disclosure to provide a replaceable lancet device capable of minimizing pain caused by a needle while enabling the needle to be quickly retracted.

It is a further aspect of the present disclosure to provide a replaceable lancet device that can maintain the hygiene of the needle until the needle is used.

It is still another aspect of the present disclosure to provide a replaceable lancet device that can be effectively prevented from being reused.

Technical solution

According to an embodiment of the present disclosure, a replaceable lancet device includes: a tubular barrel including a front opening; a needle unit inserted into the front opening of the cylinder and slidably movable along the axial direction; and an actuation spring which urges the needle unit in the barrel outwardly in a resilient manner in the front end direction.

In addition, when the needle cylinder includes a retraction opening that opens laterally from the front opening in a predetermined longitudinal section to expose the needle unit or that is cut in the predetermined section in the longitudinal direction to guide the needle unit for retraction, it is easy to retract the needle unit from the needle cylinder through the retraction opening. Furthermore, the retraction opening is even useful for inserting the needle unit into the needle cylinder.

In addition, when the cartridge includes a rear opening and further includes a rear cover configured to open and close the rear opening and to contact a rear end of the actuation spring, the component is inserted through the rear opening of the cartridge and the rear opening is closed with the rear cover, thereby facilitating placement and assembly of the component within the lancet device.

In addition, when the needle depth adjusting member is provided between the cylinder and the rear cover to adjust the position of the rear cover in the axial direction, the depth of insertion of the needle for blood collection included in the needle unit into the epidermis is adjustable, thereby enabling flexible use of the lancet device according to the purpose of blood collection and the user.

Further, when the needle depth adjuster includes a screw guide portion formed in the cylinder and an engagement moving portion provided in the rear cover and engaged with the screw guide portion, the rear cover is rotated from the cylinder to finely adjust the depth of insertion of the needle into the epidermis.

In addition, when the stopping sleeve is additionally interposed between the cylinder and the rear cover, rotates together with the rear cover, and includes a locking blocking portion formed between the stopping sleeve and the cylinder and causes rotational resistance based on engagement between the stopping sleeve and the cylinder, the depth of needle insertion is maintained constant by the locking blocking portion and the stepped depth is adjusted and maintained according to the groove formed in the locking blocking portion.

In addition, when the needle unit includes the following components, the needle unit is divided into a front slider and a needle carrier, and interaction between the front slider and the needle carrier is advantageous for the lancet device to perform a standby process and a blood collection process: a tubular front slider inserted into the cylinder and movable in the axial direction, and including a front end partially exposed from an end of the cylinder; and a needle carrier including a carrier body supporting the needle for blood collection so as to protrude in a front end direction and be movably accommodated in the front slider in an axial direction, a plurality of elastically deforming portions extending rearward from the carrier body and being elastically deformable inward in a radial direction, and an interlocking holding protrusion protruding from the elastically deforming portions in a direction transverse to the axial direction, held in a rear end of the front slider, and moved together with the front slider when moved rearward.

Further, when the replaceable lancet device further includes a stopper protruding inward in a radial direction of the front slider and maintained to be held in the interlocking holding projection, and a separation preventing projection provided in the needle carrier, held in the stopper, and preventing separation of the needle carrier in a backward moving direction, the movable range of the needle carrier can be restricted and reuse of the needle carrier can be prevented.

In addition, when the buffer spring is mounted to the front of the needle carrier and extends longer than the protruding length of the needle, the buffer spring can alleviate pain by striking the epidermis before the needle and prevent accidents caused by used needles by preventing the needles from being exposed after blood collection.

In addition, when the replaceable lancet device further includes a standby locking groove provided in one of the inner wall of the cylinder and the outer wall of the front slider and a standby locking portion provided on the other of the inner wall of the cylinder and the outer wall of the front slider, locking to the standby locking groove, and enabling the front slider to move within a certain range, the front slider is prevented from being separated to a certain extent or more in the front end direction or the rear end direction of the cylinder, thereby preventing the front slider from being erroneously operated during the standby process and the blood collection process.

In addition, when the front slider further includes a retraction grip portion to grip and retract one end of the front slider inserted into the cylinder, the user may grip and retract the front slider to forcibly separate the front slider as needed. Further, even when the front slider is loaded into the syringe, the retracting gripping portion may be useful.

Further, when the retraction grip portion is connected to the front slider via the retraction opening and exposed to the outside of the syringe or annularly surrounds the syringe, the grip area of the retraction grip portion is enlarged to facilitate retraction of the front slider.

In addition, when the needle cylinder includes a trigger portion provided in the needle cylinder, and a slope provided in one of the trigger portion and an elastically deforming portion provided in the needle carrier deforms the elastically deforming portion inward when the needle carrier is retracted, the needle carrier may be inserted into the front slider by movement of the needle carrier or the needle cylinder.

According to another embodiment of the present disclosure, a needle unit of a replaceable lancet device including a tubular-shaped syringe includes: a tubular front slider inserted into the cylinder and movable in the axial direction, and including a front end partially exposed from an end of the cylinder; and a needle carrier including a carrier body supporting the needle for blood collection so as to protrude in a front end direction and be movably accommodated in the front slider in an axial direction, a plurality of elastically deforming portions extending rearward from the carrier body and being elastically deformable inward in a radial direction, and an interlocking holding protrusion protruding from the elastically deforming portions in a direction transverse to the axial direction, held in a rear end of the front slider, and moved together with the front slider when moved rearward.

In addition, when there is a buffer spring mounted to the front of the needle carrier and extending longer than the protruding length of the needle, the buffer spring can alleviate pain by striking the epidermis before the needle and prevent accidents caused by used needles by preventing the needles from being exposed after blood collection.

In addition, when the standby locking part is provided in the other of the inner wall of the cylinder and the outer wall of the front slider, locked to the standby locking groove and enabling the front slider to move within a certain range, the front slider is prevented from being separated to a certain extent or more in the front end direction or the rear end direction of the cylinder, thereby preventing the front slider from being erroneously operated during the standby process and the blood collection process.

In addition, when the front slider further includes a retraction grip portion to grip and retract one end of the front slider inserted into the cylinder, the user can grip and retract the front slider to forcibly separate as needed. Further, even when the front slider is loaded in the syringe, the retraction grip portion may be useful.

Further, when the retraction gripping portion is connected to the front slider via a retraction opening provided in the front end of the syringe and exposed to the outside of the syringe or annularly surrounds the syringe, the gripping area of the retraction gripping portion is enlarged to facilitate retraction of the front slider.

In addition, when the front slider includes a protruding coupling portion to prevent the needle carrier from being separated in the backward direction, the needle carrier is prevented from being separated from the front slider in the backward direction due to shaking, rotation, etc. of the lancet device.

Advantageous effects

The lancet device according to the present disclosure has a detachable structure that is intuitive and simple and easily replaceable with the needle unit.

Further, according to an embodiment of the present disclosure, there is provided a replaceable lancet device having the following effects: the jitter that occurs during the blood collection procedure is minimized by locking and releasing the needle unit so that the depth of insertion of the needle into the epidermis can be adjusted, pain is minimized, hygiene of the needle is maintained, and the needle unit is prevented from being reused.

Drawings

Fig. 1 is a perspective view of a replaceable lancet device according to an embodiment of the present disclosure.

Fig. 2 is a longitudinal cross-sectional view of a replaceable lancet device according to an embodiment of the present disclosure.

Fig. 3 is an exploded perspective view of a replaceable lancet device according to an embodiment of the present disclosure.

Fig. 4 (a) to (c) are sectional views illustrating an assembling process of a needle unit according to an embodiment of the present disclosure.

Fig. 5 (a) to (e) are sectional views sequentially showing the use process.

Fig. 6 is a perspective view of a replaceable lancet device according to another embodiment of the present disclosure.

Fig. 7 is an exploded perspective view of a replaceable lancet device according to another embodiment of the present disclosure.

Fig. 8 is a longitudinal cross-sectional view of a replaceable lancet device according to another embodiment of the present disclosure.

Fig. 9 (a) and (b) are diagrams illustrating an assembly relationship between a cylinder and a front slider in a replaceable lancet device according to another embodiment of the present disclosure.

Fig. 10 (a) to (e) are diagrams sequentially illustrating a blood collection process of the replaceable lancet device according to another embodiment of the present disclosure.

Fig. 11 (a) and (b) are views illustrating replacement of a needle carrier of a replaceable lancet device according to another embodiment of the present disclosure.

* Description of symbols

1: epidermis 2: pinhole (pinhole)

10. 10': lancet device 100, 100': needle cylinder

110. 110': front opening 120, 120': rollback opening

130. 130': the standby locking part 140: trigger part

141: bevel 150: rear opening

151: a spiral guide portion 152: locking stop tab

160: indicator 200, 200': front slider

210. 210': spare holding projection 220: stop member

230: guide cutout portions 240, 240': rollback gripping portion

241': slider guide 242': elastic notch groove

250: protrusion coupling portion 300: needle carrier

310: carrier body 320: needle

330: elastically deforming part 340: outward protruding part

341: interlock retaining tab 342: separation-preventing protruding part

350: protection extension 360: interlocking support portion

400: actuating spring 500: rear end cap

520: rotation locking portion 530: spring support

540: sleeve locking groove 550: marking

600: stop sleeve 610: rotary locking groove

620: engagement moving portion 630: locking blocking part

640: ferrule protruding section 700: buffer spring

800: actuating member

Detailed Description

Fig. 1 to 3 are perspective, exploded perspective and longitudinal sectional views of a replaceable lancet device according to an embodiment of the present disclosure. Detailed configurations of the replaceable lancet device according to the embodiment of the present disclosure will be explained with reference to fig. 1 to 3.

The replaceable lancet device (10) according to the present disclosure refers to a device in which a needle unit including a front slider (200) and a needle carrier (300) is inserted into a tubular cylinder (100), and the needle carrier (300) inserted into the cylinder (100) is elastically ejected by an actuating spring (400) interposed between the cylinder (100) and the needle carrier (300), thereby collecting a small amount of blood from a small needle hole (2) formed in a epidermis (1).

The syringe (100) has a front opening (110) that is open at a front end. A retraction opening (120) formed by cutting a part of the cylinder (100) is formed around the front opening (110). A standby locking part (130) in which a needle unit is inserted and held is formed on one side of the front end of the cylinder (100). A trigger portion (140) is formed in the cylinder (100). The rearward end of the barrel (100) is also open like the forward end of the barrel (100) and has a rearward opening (150) and an indicator (160) formed on the outer surface of the barrel (100).

The retraction opening (120) is cut from the front end in the axial direction above the predetermined longitudinal section and in the circumferential direction above the predetermined transverse section. The width and length of the retraction opening (120) are large enough to allow the user's finger to contact the surface of the front slider (200) included in the needle unit. There may be at least one retraction opening (120), and a pair of retraction openings (120) may be provided facing each other along a circumferential direction of the front opening (110). Furthermore, the retraction opening (120) may be arranged to guide the front slider (200) comprised in the needle unit to retract along the longitudinal direction of the cutting section.

The standby locking part (130) is shaped like a groove limiting the movable range of the front slider (200) of the needle unit so that the front slider (200) inserted into the inside of the cylinder (100) cannot move beyond the front opening (110) or the inside of the cylinder. Due to the spare locking part (130), only the free end of the front slider (200) inserted into the cylinder (100) is exposed, while the remaining part is not exposed from the inside of the cylinder (100). In addition, even when the front slider (200) moves to the rear end of the cylinder (100), it is ensured that one side of the front slider (200) is exposed to the front opening (110) or the retraction opening (120).

The triggering portion (140) refers to a portion protruding from the inside of the cylinder (100) such that one end of the needle carrier (300) is in contact with the triggering portion (140), thereby restricting the rearward movement of the needle carrier (300) or allowing one end of the needle carrier (300) to be affected when the needle carrier (300) moves rearward. A bevel (141) is formed on the surface of the trigger part (140) so that the needle carrier (300) can be gradually influenced while being moved in the longitudinal direction of the cylinder (100).

The rear opening (150) is an opening formed at the rear end of the cylinder (100). The rear opening (150) may facilitate assembly of the lancet device (10) by enabling components (e.g., the actuation spring (400)) other than a needle unit inserted through the front opening (110) of the barrel (100) to be inserted through the rear opening (150) and then closing the rear opening (150) using a rear end cap (500) (to be described later). Instead, the rearward end of the barrel (100) may be blocked for some purpose without forming the rearward opening (150), and in such a case, the actuation spring (400) may be supported on the rearward end of the barrel (100). The rear opening (150) includes a screw guide portion (151) into which a rear cover (500) (to be described later) is inserted, and a locking blocking protrusion (152) that limits the rotation angle of the rear cover (500).

As described above, the needle unit comprises the front slider (200) and the needle carrier (300).

The front slider (200) has a tubular shape along the axial direction of the cylinder (100). The front slider (200) is received through the front opening (110) of the cylinder (100) and is partially exposed to the outside. The front end region of the front slider (200) may be shaped to have an outer diameter that gradually increases from the front end toward the rear end along the length direction. The front slider (200) includes: a standby holding projection (210) formed to extend outwardly; a stopper (220) formed at the rear end of the front slider (200); a guide cutout portion (230) formed by partially cutting a front end portion of the front slider (200); a retreating grip portion (240) formed on an outer surface or outer side of the front slider (200); and a protruding coupling portion (250) formed at the rear end of the front slider (200).

The standby holding projection (210) is formed to project from the outside of the front slider (200) toward the standby locking portion (130) of the cylinder (100). Accordingly, the movable range of the front slider (200) may be limited such that the front slider (200) can move only within a section of the locking groove formed in the standby locking part (130), and the front slider (200) may be prevented from being separated from the cylinder (100) since the standby holding protrusion (210) is locked to one end of the standby locking part (130) in case of a simple movement in which a user does not apply a force. This coupling relationship between the tab and the recess may also be formed inversely, as may the alternate locking portions (130 ') (see fig. 8) and alternate retaining tabs (210') (see fig. 8) formed in the front slider (200 ') (see fig. 7) and syringe (100') (see fig. 7) according to another embodiment. Further, the shape of the standby locking part (130) may be shaped like a protrusion arranged at a position spaced forward or rearward from the standby locking part (130), and the locking may be implemented as a standby holding protrusion (not shown) and a separation preventing protrusion (not shown) having a protruding shape instead of a groove shape, so that the standby holding protrusion (210) may be locked within a predetermined range.

The stopper (220) is formed at one end of the rear opening area of the front slider (200) and protrudes in the direction of the central axis of the front slider (200). The stopper (220) interlocks with the forward movement of the needle carrier (300) when the needle carrier (300) is located in the rear outer region of the front slider (200), thereby preventing the rear end portion of the needle carrier (300) from entering the inside of the front slider (200). In addition, the stopper (220) interlocks with the rearward movement of the needle carrier (300) when the needle carrier (300) is located in the front slider (200), thereby preventing the needle carrier (300) from being separated in the direction of the rear end of the front slider (200).

A guide cutout portion (230) is formed in the front end region of the front slider (200) to have cutting surfaces facing each other in the longitudinal direction, whereby an opening region is prepared in the front end portion. The guide cutout portion (230) elastically deforms the front end portion of the front slider (200). Accordingly, the needle carrier (300) can be inserted and mounted even through the opening area at the front end of the front slider (200), and erroneous operation due to interference between the cylinder (100) and the needle carrier (300) can be prevented during the movement of the front slider (200), thereby facilitating the sliding movement of the front slider (200). Furthermore, the presence of the guide cut portion (230) is also advantageous for solving the molding technical problems related to the overall shape of the front slider (200) and the formation of the stopper (220).

The retraction grip portion (240) is formed on an outer side or surface of the front slider (200) such that a user can easily grip the front slider (200) to insert the front slider (200) into the front opening (110) of the cylinder (100) or retract the front slider (200) inserted into the front opening (110). The retraction grip portion (240) may correspond to an outer surface of the front slider (200) exposed through the front opening (110) and the retraction opening (120) of the cylinder (100), and may be formed to protrude outwardly from the outer surface of the front slider (200) exposed through the front opening (110) and the retraction opening (120), or have a fine protrusion formed from the outer surface of the front slider (200) to facilitate gripping.

The protruding coupling portion (250) refers to a portion locked to one end of the needle carrier (300) such that the needle carrier (300) cannot be separated in the backward direction of the front slider (200) when the front slider (200) is first coupled with the needle carrier (300) to maintain the assembled state of the needle unit.

The needle carrier (300) is movably coupled to the rear end of the front slider (200) along the axial direction of the front slider (200). The needle carrier (300) includes a carrier body (310) and at least one elastically deforming portion (330), the carrier body (310) being formed to accommodate therein a needle (320) for blood collection, the elastically deforming portion (330) being provided in an extending portion extending rearward in the axial direction at a rear end of the carrier body (310). Here, there may be one or more elastically deforming portions (330) symmetrical about the axis.

The elastically deforming portion (330) is elastically deformable in a radial direction of the needle carrier (300) due to its shape. The elastically deforming portion (330) is provided with an outward protrusion (340) at a rear end thereof, and the outward protrusion (340) includes a front-side protrusion serving as an interlocking holding protrusion (341) caught by a rear end or a stopper (220) of the front slider (200). When the front slider (200) moves backward by interlocking between the interlocking holding projection (341) and the stopper (220), the needle carrier (300) also moves backward. An anti-separation protrusion (342) is formed on a rearward side of the outward protrusion (340) opposite to the interlocking holding protrusion (341) formed in the outward protrusion (340). When the needle carrier (300) is inserted into the front slider (200), the separation preventing protrusion (342) is caught by the stopper (220) so that the needle carrier (300) cannot move back and separate from the rear end of the front slider (200), thereby preventing the needle carrier (300) from being separated rearward. Here, the interlocking holding protrusion (341) and the separation preventing protrusion (342) may be formed in the elastically deforming portion (330) separated from each other, respectively.

The protection extension (350) is formed long at the front end of the needle carrier (300). The guard extension (350) may be integrally formed with the carrier body (310) while surrounding the needle (320) as the carrier body (310) is formed. The protection extension (350) serves to protect the needle (320) in a hygienic manner until the needle (320) is used and to prevent deformation of the needle (320). A manipulation tube (not shown) may be provided to cover a connection portion between the protection extension portion (350) and the carrier body (310) at the outside. The manipulation tube (not shown) may resist an external force acting from the protection extension portion (350) in a radial direction, thereby protecting the protection extension portion (350) from being easily removed until the manipulation tube (not shown) is removed.

At the rear end of the needle carrier (300) there is an interlocking support portion (360) supporting one end of an actuation spring (400) or one end of an actuation member (800) (to be described later). When the interlocking support part (360) is directly connected to the actuation spring (400), the length of the actuation spring (400) pressing the needle carrier (300) increases to decrease the durability of the actuation spring (400) and cause a problem in that the actuation spring (400) is easily damaged due to repeated elastic deformation. Thus, the actuation member (800) may be sandwiched between the interlocking support portion (360) and the actuation spring (400).

The actuation member (800) may indirectly transfer the spring force from the actuation spring (400) to the interlocking support portion (360) of the needle carrier (300). Since the length of the actuating spring (400) is shortened by the actuating member (800), an inexpensive actuating spring (400) having an appropriate elastic force can be used and the actuating spring (400) can be improved in terms of stability and durability.

The actuation spring (400) provides a driving force to eject the needle carrier (300) comprised in the needle unit in a resilient manner in a forward direction. Thus, the needle unit, i.e. the needle carrier (300) and the front slider (200), experiences elastic resistance when moving backward. The actuation spring (400) may be supported by the rear end of the syringe (100) when the rear end of the syringe (100) is closed, however the actuation spring (400) may also be supported by a rear cap (500) covering the rear end of the syringe (100) when the rear end of the syringe (100) is opened via the rear opening (150).

The rear end cap (500) is coupled to the rear end of the syringe (100) via the rear opening (150) of the syringe (100), and the stop collar (600) is sandwiched between the rear end cap (500) and the rear opening (150).

The rear cap (500) covers the rear opening (150) of the cylinder (100) to prevent components (e.g., an actuation spring (400) or a needle unit inserted into the cylinder (100)) from being separated from the rear opening (150) and to adjust the insertion depth of the needle (320) for blood collection. The lancet device (10) may also be configured with the barrel (100) with the rear opening (150) closed without including the rear end cap (500) and the stop collar (600) when no adjustment of the insertion depth of the needle (320) is required.

When the stopping collar (600) is not interposed between the rear cap (500) and the cylinder (100), an engagement moving portion (not shown) may be provided in the rear cap (500) and enable the rear cap (500) to directly engage with the screw guide portion (151) formed around the rear opening (150) of the cylinder (100). When the rear cover (500) is directly coupled with the rear opening (150), the rear cover (500) may be rotated within a certain range by a groove region formed by the screw guide portion (151), and such a screw shape may move the rear cover (500) up and down. In contrast, the engagement moving portion (not shown) and the screw guide portion (151) provided in the rear cap (500) and the cylinder (100), respectively, may be formed in opposition, that is, implemented as an engagement moving portion (not shown) formed in the cylinder (100) and a screw guide portion (not shown) formed in the rear cap (500). Furthermore, such rotatable coupling structure may also be implemented in the form of a screw-like thread having an engagement moving portion (not shown) formed on one of the rear end cap (500) or the rear opening (150) and a screw guide portion (not shown) formed on the other. However, in this case, the rear end cap (500) is rotatable instead of being fixed at a certain point, and thus the set depth of the needle may often vary depending on an external force. To prevent this, the stop sleeve (600) may be sandwiched between the rear end cap (500) and the rear opening (150).

When the stopping sleeve (600) is sandwiched between the rear cover (500) and the rear opening (150), the rear cover (500) includes a rotation locking portion (520), a spring support (530), a sleeve locking groove (540), and a mark (550), and the rotation locking portion (520) is locked to one end of the stopping sleeve (600) to be interlocked with the rotation of the rear cover (500).

The rotation locking portion (520) is coupled to the stopping sleeve (600) such that the rotational movement of the rear end cap (500) is interlocked with the stopping sleeve (600).

The spring support (530) refers to a portion protruding from the inner surface of the rear cover (500) and supporting the actuation spring (400).

The sleeve locking groove (540) refers to a groove formed along an inner circumferential direction of the rear cover (500) such that one end of the stopping sleeve (600) is inserted into the sleeve locking groove (540) to help engagement between the rear cover (500) and the stopping sleeve (600).

The mark (550) refers to a logo or character symbol provided on the outer surface of the rear cover (500). The user can intuitively determine the depth to which the needle is adjusted by the rear end cap (500) rotating to align the indicia (550) with the indicator (160) formed on the outer surface of the syringe (100).

The stopping collar (600) refers to a cylindrical member formed along the circumferential direction of the rear opening (150) and is interposed between the rear cap (500) of the cylinder (100) and the rear opening (150) such that the rear cap (500) can be stopped at a specific rotation angle. The stop sleeve (600) comprises: a rotation locking groove (610) engaged with a rotation locking portion (520) formed in the rear cover (500); an engagement moving portion (620) engaged with a screw guide portion (151) formed in the rear opening (150); a locking blocking portion (630) engaged with a locking blocking protrusion (152) formed in the rear opening (150); and a sleeve projecting portion (640).

The rotation locking groove (610) refers to a groove that accommodates a rotation locking portion (520) formed in the rear cover (500). When the rear cover (500) rotates, the stop sleeve (600) also rotates in interlocking with the rotation of the rear cover (500).

The engagement moving portion (620) is inserted into a screw guide portion (151) formed in the rear opening (150) so that the stop sleeve (600) can be rotated within a certain range through a groove region formed by the screw guide portion (151). Since the rotation of the rear cover (500) is interlocked with the rotation locking portion (520) and the rotation locking groove (610) of the stopping sleeve (600), the stopping sleeve (600) is rotated by the rotation of the rear cover (500), and the rear cover (500) moves up and down while rotating along the shape of the spiral guide portion (151). The engagement moving portion (620) and the screw guide portion (151) provided in the stopping collar (600) and the cylinder (100), respectively, may be inversely implemented as an engagement moving portion (not shown) formed on the cylinder (100) and a screw guide portion (not shown) formed on the stopping collar (600). The engagement moving portion (620) and the screw guide portion (151) may also be implemented in a thread-like form in which both the engagement moving portion (620) and the screw guide portion (151) have the same protruding shape or recessed shape.

The locking blocking portion (630) refers to a groove formed along a radial direction of an inner surface of the stopping sleeve (600). For this, a plurality of grooves may be formed at regular intervals. When the rear cover (500) rotates, the stop sleeve (600) rotates together by the engagement relationship between the rotation locking groove (610) and the rotation locking portion (520), and each groove included in the locking blocking portion (630) is locked to the locking blocking protrusion (152) so that the rear cover (500) can stop at a regular angle. In this case, the locking blocking protrusion (152) may be formed to have elasticity due to its circumference being partially cut.

The sleeve protrusion (640) is inserted into the sleeve locking groove (540) of the rear cover (500), thereby locking and coupling the rear cover (500) and the stop sleeve (600) to each other.

Meanwhile, a buffer spring (700) surrounding the needle (320) and protecting the extension portion (350) is installed at the front end of the needle carrier (300). The buffer spring (700) extends farther in the forward direction than the needle (320), and thus when the needle carrier (300) is driven to collect blood in the forward direction of the syringe (100), the buffer spring (700) collides with and presses against the skin of the user before the needle (320). When the buffer spring (700) contacts the user's epidermis, the buffer spring (700) collides and disturbs the tactile nerve around the blood collection point. When the buffer spring (700) is compressed, the buffer spring (700) presses the periphery of the epidermis to be pierced by the needle (320), thereby blocking the pain nerve around the epidermis. Piercing the epidermis with the needle (320) when disturbing the tactile nerve and blocking the pain nerve as described above may result in less pain felt by the user. The compressed buffer spring (700) returns to its original state by generating a resilience force (restoring force). Thus, the needle (320) is rapidly pulled out of the epidermis, thereby alleviating pain during such pulling-out operations. The buffer spring (700) may be provided in the form of a compressed coil spring as shown, but may also be provided in the form of an elastic material (e.g., a leaf spring) and silicone in some cases.

With reference to fig. 4 (a) to (c), an assembling process of the needle unit according to the present disclosure will be explained.

As shown in fig. 4 (a), a buffer spring (700) is coupled to the front end of the needle carrier (300) and inserted into the rear end of the front slider (200). In this case, an outward protrusion (340) formed on the needle carrier (300) is interposed between the stopper (220) and the protrusion coupling portion (250) at the rear end of the front slider (200) so that the needle carrier (300) can be coupled to the front slider (200).

As shown in fig. 4 (b), the protective extension (350) may be removed from the front end of the assembled needle carrier (300). The protective extension (350) may also be removed at the same time as the front slider (200) is inserted into the syringe (100).

As shown in (c) of fig. 4, the needle unit, in which the front slider (200) and the needle carrier (300) are assembled, is inserted into the front opening (110) of the cylinder (100) by clamping the retraction clamping portion (240) formed on the surface of the front slider (200). At this time, the user can easily mount the needle unit to the cylinder (100) through a space formed by the retraction opening (120) formed along the longitudinal direction of the cylinder (100).

The process of using the lancet device (10) will be described with reference to fig. 5 (a) to 5 (e).

Fig. 5 (a) is a sectional view showing a standby state of the lancet device (10) in which the needle unit is assembled through steps (a) to (c) of fig. 4. A needle (320) for blood collection is exposed at the front end of the needle carrier (300) and the needle unit is prevented from being separated forward by engagement between a back-up retaining projection (210) of the front slider (200) and a back-up locking portion (130) of the syringe (100). Thus, the needle unit may maintain a standby position within the syringe (100).

In this state, when the front end of the lancet device (10) (i.e., the front end of the front slider (200)) is placed on the epidermis (1) of a person to be subjected to blood sampling and pressurizes the cylinder (100), the front slider (200) moves from the inside of the cylinder (100) to the rear end.

Fig. 5 (b) shows the lancet device (10) moved close to the epidermis (1) of the blood sample and in a retracted position in which the front slider (200) is moved rearwardly within the barrel (100).

In this case, the stopper (220) of the front slider (200) is interlocked with the outward protrusion (340) of the needle carrier (300), thereby moving the needle carrier (300) together in the rearward direction. When the needle carrier (300) moves in the rearward direction of the cylinder (100), an elastically deforming portion (330) integrally formed with the needle carrier (300) is in contact with a trigger portion (140) provided on the inner wall of the cylinder (100), and the elastically deforming portion (330) is elastically deformed when guided to the inside of the cylinder (100) by a slope (141) provided on the trigger portion (140). When such movement is continued and the elastically deforming portion (330) is elastically deformed to a certain degree or more, the width between the opposing outward protrusions (340) becomes narrower than the inner width of the stopper (220) formed in the front slider (200), thereby releasing the blocking operation of the outward protrusions (340) and enabling the needle carrier (300) to enter the inside of the front slider (200) and move in the front direction. Meanwhile, the slope causing elastic deformation may be provided not in the trigger portion (140) but in the elastic deformation portion (300).

Meanwhile, when the needle carrier (300) is moved in the backward direction by the front slider (200), the actuating member (800) connected to the interlocking support part (360) is also moved in the backward direction, the actuating spring (400) interposed between the spring support (530) and the actuating member (800) is compressed, and the elastic force of the compressed actuating spring (400) generates a force pushing the needle carrier (300) downward and reaching the skin (1).

Fig. 5 (c) shows the moment when the needle carrier (300) is ejected forward by the compressed actuation spring (400) and the buffer spring (700) is in contact with the epidermis. The needle carrier (300) receives the elastic force of the actuating spring (400) through the actuating member (800) and moves straight to the skin (1), and the buffer spring (700) provided in front of the carrier body (310) collides with the skin (1). After the impact of the buffer spring (700) on the surface (1), the continuous inertial movement of the needle carrier (300) causes the buffer spring (700) to vibrate and to be compressed and store a resilience force for retraction of the needle carrier (300).

Fig. 5 (d) shows that the needle (320) for blood collection penetrates into the body of the user and forms a needle hole (2). In this case, the needle (320) is ejected from the central axis of the needle carrier (300) with minimal lateral shake by linear movement of the needle carrier (300) and the actuating member (800) surrounding the interlocking support portion (360) of the needle carrier (300), thereby forming the needle hole (2) precisely at a desired point without shake.

When the buffer spring (700) is compressed to a certain degree or more by the inertial force applied by the needle carrier (300), the needle (320) for blood collection is pushed rearward by the resilience force of the buffer spring (700) and thus pulled out of the epidermis (1), thereby returning to the inside of the front slider (200).

Fig. 5 (e) shows the return of the front slider (200) and the needle carrier (300) after the blood collection procedure. Under the resilience of the compressed buffer spring (700), the needle (320) for blood collection is pulled out of the epidermis (1) and returned to the inside of the front slider (200) quickly, and the front slider (200) is positioned freely between the retracted position and the standby position due to not receiving any force in the forward direction or the backward direction.

In this case, the used needle carrier (300) is located in the inner space of the front slider (200). When the needle carrier (300) moves in the rearward direction of the front slider (200), the separation preventing protrusion (342) formed in the outward protrusion (340) is caught by the stopper (220) so that the needle carrier (300) cannot be separated from the inside of the front slider (200) in the rearward direction and cannot be reused.

Accordingly, the used needle unit including the front slider (200) and the needle carrier (300) can be separated from the needle cylinder (100) by gripping the needle unit with the retraction opening (120) provided on the lateral side of the needle cylinder (100), and the separated needle unit is discarded. A new needle unit is then inserted and used.

The aforementioned lancet device (10) according to an embodiment of the present disclosure is provided with a needle unit including a front slider (200) and a needle carrier (300) capable of being inserted or retracted through a front opening (110) of a syringe (100).

In addition, the needle unit can be easily loaded to and unloaded from the needle cylinder (100) through the retraction opening (120) formed in the needle cylinder (100) and the retraction grip portion (240) formed in the front slider (200).

Furthermore, the rear end cap (500) enables adjustment of the insertion depth depending on the skin thickness of the blood collection subject or the purpose of blood collection.

Furthermore, according to the embodiments of the present disclosure, a compact structure and good operability are provided.

Fig. 6 to 9 (a) and (b) are perspective, exploded and longitudinal sectional views of a lancet device according to another embodiment of the present disclosure, which illustrate an assembly relationship between a cylinder (100 ') and a front slider (200 ') of the lancet device (10 ').

With reference to (a) and (b) of fig. 6 to 9, a configuration of a lancet device according to another embodiment of the present disclosure will be described. A replaceable lancet device (10 ') according to another embodiment of the present disclosure includes a barrel (100'), a front slider (200 '), a needle carrier (300), an actuation spring (400), and a rear end cap (500), the rear end cap (500) supporting the actuation spring (400) and covering a rear end of the barrel (100').

The barrel (100 ') is formed from a tubular body and includes a front opening (110'), a retraction opening (120 '), a back-up locking portion (130'), a trigger portion (140), a rear opening (150), and indicia (160).

The front slider (200 ') and the needle carrier (300) are accommodated in the needle cylinder (100') through a front opening (110 ') which opens at the front end of the needle cylinder (100'). The retraction opening (120 ') is cut from the front opening (110') in a predetermined section along the longitudinal direction to serve as a guide for accommodating the front slider (200 ') in the cylinder (100') or retracting the front slider (200 ') from the cylinder (100'). A standby locking portion (130 ') is formed protruding from a surface of the cylinder (100') and performs a holding operation to prevent the front slider (200 ') fitted in the cylinder (100') from being separated in the front end direction.

A trigger portion (140) having a slope (141) gradually inclined inwardly toward the rear end at a position spaced rearward from the front opening (110 ') is provided on the inner wall of the cylinder (100').

A rear cap (500) is inserted into a rear opening (150) that opens at the rear end portion of the cylinder (100'). A screw guide portion (151) and a locking blocking protrusion (152) are formed around the rear opening (150), and the rear cover (500) is coupled to the screw guide portion (151), the locking blocking protrusion (152) stopping the rear cover (500) at a certain interval along the circumferential direction of the rear opening (150).

The front slider (200 ') refers to a tubular member that is accommodated in the front end portion of the cylinder (100') and has a front end portion that is partially exposed from the front opening (110 ') of the cylinder (100'). The front slider (200 ') has a retraction grip portion (240 ') annularly formed around the front opening (110 ') of the cylinder (100 ') and includes a standby holding projection (210 '), a stopper (220), a guide cutout portion (230), and a projection coupling portion (250). Here, the retraction grip portion (240 ') is provided to be connected to the front slider (200') via the retraction opening (120 ') and exposed to the outside of the cylinder (100').

The retraction grip portion (240 ') enables a user to easily assemble and disassemble the front slider (200') to and from the syringe (100 ') by gripping the retraction grip portion (240'). The retraction grip portion (240 ') includes a slider guide (241 ') and a resilient cutout groove (242 '). The slider guide (241 ') is interposed between the outer surface of the front slider (200') and the retraction grip portion (240 ') to support the retraction grip portion (240'). The slider guide (241 ') may assist the front slider (200') to move vertically along a groove formed in a retraction opening (120 ') formed in the syringe (100'). The elastic cutout groove (242 ') refers to a cutout portion that enables a portion of the retraction grip portion (240') to have elasticity. A resilient cutout groove (242 ') is formed on the periphery of the standby holding projection (210') so that the periphery of the standby holding projection (210 ') can be elastically deformed when the front slider (200') is assembled to the cylinder (100 ') or disassembled from the cylinder (100'). Further, due to the elastic cutout groove (242 '), even if the spare holding projection (210') is repeatedly rubbed over a long period of time, the spare holding projection (210 ') and the spare locking portion (130') are not easily worn out.

The standby holding protrusion (210 ') accommodates a standby locking part (130 ') formed on an outer surface of the cylinder (100 ') to prevent the front slider (200 ') from being separated from the cylinder (100 ') in the front end direction. Since the standby locking part (130 ') and the standby holding protrusion (210') are formed on opposite wall surfaces of the cylinder (100 ') and the front slider (200'), the standby locking part may be formed on one of the cylinder (100 ') and the front slider (200'), and the standby holding protrusion may be formed on the other of the cylinder (100 ') and the front slider (200'), thereby locking each other.

The guide cut portion (230) refers to a portion formed by cutting opposite sides of the front slider (200') along the longitudinal direction. The guide cutout portion (230) is advantageously used to solve molding technical problems related to the shape of the front slider (200 ') and enables the width of the front slider (200') to be flexibly changed due to the cutout region of the front slider (200 '), so that the components driven into the front slider (200') can be smoothly moved.

A protruding coupling portion (250) is formed at the rear end of the front slider (200 ') to insert the needle carrier (300) into the front slider (200 ') and couple with the front slider (200 ') to prevent backward separation such that the coupling between the front slider (200 ') and the needle carrier (300) cannot be released until the needle carrier (300) is ejected after the front slider (200 ') and the needle carrier (300) are assembled through the front opening (110 ') of the cylinder (100 ').

The needle carrier (300) comprises a carrier body (310), a needle (320) for blood collection, an elastically deformable portion (330), an outward projection (340) and a protective extension (350). The carrier body (310) mounts a blood collection needle (320) at a front end of the carrier body (310) and includes a pair of elastically deforming portions (330) provided at a rear end of the carrier body (310) and extending rearward axially symmetrically. These elastically deforming portions (330) are elastically deformable in the radial direction.

The elastically deforming portion (330) is provided at a rear end thereof with an outward protrusion (340). The outward protrusions (340) are sandwiched between the stop (220) of the front slider (200 ') and the protruding coupling portion (250) and maintain coupling between the needle carrier (300) and the front slider (200'). An interlocking holding protrusion (341) formed on one side of the outward protrusion (340) is caught by the stopper (220) when the front slider (200 ') moves backward so that the needle carrier (300) can also move backward together with the front slider (200').

The protective extension (350) extends long in the direction of the front end at the front end of the needle carrier (300). The guard extension (350) is integrally formed with the carrier body (310) while surrounding the needle (320) when the carrier body (310) is molded. The protection extension (350) serves to protect the blood collection needle (320) in a hygienic manner. The protection extension portion (350) may be protected from the outside by a manipulation tube (not shown) covering the outside of the protection extension portion (350).

An interlocking support portion (360) is formed at the rear end of the needle carrier (300). The interlocking support portion (360) accommodates a portion of an actuating member (800) (to be described later).

The actuating spring (400) is interposed between the other end of the actuating member (800) contacting the interlocking support part (360) and the rear end cap (500) (described later), compressed by the movement of the needle carrier (300), and then transmits the compressed elastic force back to the needle carrier (300), thereby elastically pushing the needle carrier (300) in the forward direction.

The rear cap (500) is coupled to the rear opening (150) of the cylinder (100') and shields the opening of the rear opening (150). The rear end cap (500) rotates in a radial direction of the rear opening (150) and is arranged in a group with a stop sleeve (600) (to be described later) such that the rear end cap (500) can stop at some point within the rotation section. The rear end cap (500) includes a rotational locking portion (520), a spring support (530), a sleeve locking groove (540), and indicia (550).

The mark (550) refers to a logo or character symbol provided on the outer surface of the rear cover (500). The user can intuitively determine the depth of the needle adjusted by the rear cap (500) that is rotated to align the indicia (550) with the indicator (160) formed on the outer surface of the syringe (100).

The stopping collar (600) refers to a cylindrical member formed along the circumferential direction of the rear opening (150) and is interposed between the rear cap (500) of the cylinder (100) and the rear opening (150) so that the rear cap (500) can be stopped at a specific rotation angle. The stop sleeve (600) comprises: a rotation locking groove (610) engaged with a rotation locking portion (520) formed in the rear cover (500); an engagement moving portion (620) engaged with a screw guide portion (151) formed in the rear opening (150); a locking blocking portion (630) engaged with a locking blocking protrusion (152) formed in the rear opening (150); and a sleeve projecting portion (640).

The engagement moving portion (620) is inserted into a screw guide portion (151) formed in the rear opening (150) so that the stop sleeve (600) can be rotated within a certain range through a groove region formed by the screw guide portion (151). Engagement between the rotation locking groove (610) and the rotation locking portion (520) enables the stop collar (600) to rotate with rotation of the rear end cap (500).

The locking blocking portion (630) refers to a groove formed along a radial direction of an inner surface of the stopping sleeve (600). For this, a plurality of grooves may be formed at regular intervals. When the rear cover (500) rotates, the stop sleeve (600) rotates together with the engagement relationship between the rotation locking groove (610) and the rotation locking portion (520), and each groove included in the locking blocking portion (630) is locked to the locking blocking protrusion (152) so that the rear cover (500) can stop at a regular angle. In this case, the locking blocking protrusion (152) may be formed to have elasticity due to its circumference being partially cut.

The sleeve protrusion (640) is inserted into the sleeve locking groove (540) of the rear cover (500), thereby enabling the rear cover (500) and the stop sleeve (600) to be locked and coupled to each other.

Referring to fig. 6 to 9 (a) and (b), an assembling process of the replaceable lancet device (10') according to the present disclosure will be described.

The buffer spring (700) is coupled to the front end of the needle carrier (300), and the needle carrier (300) is inserted into the rear end of the front slider (200'). In this case, the buffer spring (700) extends longer in the front end direction than the needle (320) for blood collection, so that the buffer spring (700) can contact and press the skin of the user before the needle (320) for blood collection when the needle carrier (300) is ejected, thereby first disturbing the touch feeling around the contact area and then blocking the nociception, thereby alleviating pain of the user. The buffer spring (700) may be provided in the form of a coil spring as shown, but in some cases may be provided in the form of an elastic material (e.g., a leaf spring) and silicone.

At this time, the outward protrusion (340) formed on the needle carrier (300) is interposed between the rear end of the front slider (200 ') and the protrusion coupling portion (250), so that the needle carrier (300) can be in a state of being coupled to the front slider (200').

The protective extension (350) is then removed from the front end of the assembled needle carrier (300). Removal of the protective extension (350) may be performed even while the front slider (200 ') is being inserted into the syringe (100').

The front slider (200 ') with the needle carrier (300) inserted therein is inserted into the cylinder (100 ') through the front opening (110 '). In this case, the slider guide (241 ') is inserted into the retraction opening (120 ') formed along the longitudinal direction of the cylinder (100 ') and the slider guide (241 ') and the retraction opening (120 ') are assembled to be guided to each other.

In this case, an elastic cut groove (242 ') formed in the retraction grip portion (240 ') is formed around the standby holding projection (210 ') so that the standby holding projection (210 ') affected by the standby locking portion (130 ') formed in the cylinder (100 ') can be elastically deformed, thereby facilitating the assembly of the front slider (200 ').

At the same time, the rear cap (500) is coupled to the rear end of the cylinder (100'). Before the rear cap (500) is coupled to the rear end of the cylinder (100 '), the stop collar (600) is first assembled to the rear end portion of the cylinder (100'). When the stopping collar (600) is assembled, the locking blocking portion (630) formed at the inside of the stopping collar (600) is in contact with the locking blocking protrusion (152) formed around the rear opening (150) of the cylinder (100'). Since the stopping sleeve (600) is forcibly assembled to the rear end portion of the cylinder (100'), the stopping sleeve (600) is made of a material that can be easily contracted and expanded to contract and return the stopping sleeve (600) to the original size of the stopping sleeve (600).

The actuation spring (400) is then connected to the spring support (530) prior to coupling the rear end cap (500) to the stop sleeve (600) and the rear opening (150). The actuating member (800) is coupled at the other end of the connected actuating spring (400) to form a connecting body among the rear end cap (500), the actuating spring (400) and the actuating member (800). The rear end cap (500) forming the connection body is coupled to the stop sleeve (600) and the screw guide portion (151) formed in the rear opening (150).

Referring back to the assembled relationship between the needle cylinder (100 ') and the front slider (200') coupled with the needle carrier (300 ') and the actuating member (800), when the front slider (200') is mounted through the front opening (110 ') of the needle cylinder (100'), the interlocking support portion (360) provided at the rear end of the needle carrier (300) contacts the actuating member (800) in the rear end direction of the needle cylinder (100 ') and pushes the actuating member (800), and the actuating spring (400) is compressed to a certain extent while pressing the needle carrier (300) inserted into the needle cylinder (100').

A process of using the lancet device (10') in a standby state as shown in fig. 6 will be described with reference to fig. 10 (a) to 10 (e).

Fig. 10 (a) is a sectional view showing a standby state of the lancet device (10 ') in which the needle carrier (300) with the protection extension (350) removed and the front slider (200') are inserted into the front opening (110 ') of the cartridge (100'). The needle (320) for blood collection is exposed at the front end of the needle carrier (300) and the forward separation of the front slider (200 ') is prevented by the action of the back-up locking portion (130 ') and the back-up holding projection (210 '), so that the front slider (200 ') can be moved between a back-up position and a retracted position in the syringe (100 ').

In this state, when the front end of the lancet device (10 '), i.e., the front end of the front slider (200 '), is placed on the epidermis (1) of the person to be blood sampled and pressurizes the cylinder (100 '), the front slider (200 ') moves in the rearward direction of the cylinder (100 ').

At the same time, the user can rotate the rear end cap (500) to adjust the depth of the needle to be inserted into the epidermis (1) of the person to be blood sampled. In this case, the user can know the depth of the needle to be inserted, which has been adjusted by the rear cap (500), through the mark (550) formed on the surface of the rear cap (500) and the indicator (160) formed on the outer surface of the cylinder (100').

Fig. 10 (b) shows the lancet device (10 ') moved close to the epidermis (1) of the blood sample and in a retracted position in which the front slider (200 ') is moved rearward within the barrel (100 ').

In this case, too, the needle carrier (300) is moved in the rearward direction by the interaction between the rear end of the front slider (200') and the interlocking holding projection (341) formed on the outward projection (340). When the needle carrier (300) moves in the rearward direction of the cylinder (100 '), an elastically deforming portion (330) integrally formed with the needle carrier (300) is in contact with a trigger portion (140) provided on the inner wall of the cylinder (100 '), and the elastically deforming portion (330) is elastically deformed when guided to the inside of the cylinder (100 ') by a slope (141) provided on the trigger portion (140). When the elastically deforming portion (330) is elastically deformed to a certain degree or more, the width between the opposing outward protrusions (340) becomes narrower than the inner width of the rear end stopper (220) of the front slider (200 '), thereby releasing the blocking operation of the outward protrusions (340) and enabling the needle carrier (300) to enter the inside of the front slider (200') and move in the front end direction.

In addition, when the needle carrier (300) moves in the backward direction, the actuating member (800) connected to the interlocking support part (360) also moves in the backward direction, the actuating spring (400) interposed between the actuating spring support (530) and the actuating member (800) is compressed, and the elastic force of the compressed actuating spring (400) generates a strong force pushing the needle carrier (300) downward and reaching the epidermis (1).

Fig. 10 (c) shows the moment when the needle carrier (300) is ejected forward by the compressed actuation spring (400) and the buffer spring (700) is in contact with the epidermis. The needle carrier (300) receives the elastic force of the actuating spring (400) through the actuating member (800) and moves straight to the skin (1), and the buffer spring (700) provided at the front of the carrier body (310) collides with the skin (1). After the buffer spring (700) collides with the surface skin (1), the continuous inertial movement of the needle carrier (300) compresses the buffer spring (700) and stores the resilience force for retracting the needle carrier (300).

Fig. 10 (d) shows the needle (320) for blood collection piercing into the body of the user and forming a needle hole (2). In this case, the needle (320) for blood collection is ejected from the central axis of the needle carrier (300) with minimal lateral shake by linear movement of the needle carrier (300) and the actuation member (800) surrounding the interlocking support portion (360) of the needle carrier (300), thereby forming a needle hole (2) at a precise desired point without shake.

When the buffer spring (700) is compressed to a certain degree or more by the inertial force applied by the needle carrier (300), the needle (320) for blood collection is pushed rearward by the resilience force of the buffer spring (700) and thus pulled out of the epidermis (1), thereby returning to the inside of the front slider (200').

Fig. 10 (e) shows the return of the front slider (200') and the needle carrier (300) after the blood collection procedure. Under the resilience of the compressed buffer spring (700), the needle (320) for blood collection is pulled out of the epidermis (1) rapidly and the needle (320) is returned to the inside of the front slider (200 '), and the front slider (200') is freely positioned between the retracted position and the standby position since it is not subjected to any force in either the upward direction or the downward direction.

In this case, the used needle carrier (300) is located in the front end space of the front slider (200 '), and the outwardly protruding portion (340) of the needle carrier (300) rubs against the inner surface of the front end of the front slider (200'). Therefore, the needle carrier (300) is not easily separated from the front slider (200') in the front end direction, but can be easily separated by applying a force greater than the generated friction force.

Fig. 11 (a) and (b) are views showing a process of replacing the needle carrier (300) by separating the front slider (200 ') from the cylinder (100 ') after using the replaceable lancet device (10 '). Similarly, the process of replacing the needle carrier (300) may also be applied to the replaceable lancet device (10) according to the foregoing embodiment shown in fig. 1 to 5.

Fig. 11 (a) shows the separation of the front slider (200 ') of the used lancet device (10 ') from the cartridge (100 '). When the front slider (200 ') is in the standby position, the user can pull the retraction grip portion (240') in the front direction, thereby separating the front slider (200 ') and the needle carrier (300) from the syringe (100').

Fig. 11 (b) shows a process of inserting a new needle carrier (300) into the separate front slider (200'). The used needle carrier (300) is naturally separated from the inside of the separated front slider (200 ') by inserting a new needle carrier (300) into the rear end of the front slider (200'). Further, the replacement of the used needle carrier (300) may also be performed by shaking the lancet device (10 ') to separate the needle carrier (300) from the lancet device (10'), or by manually pressing the rear end of the needle carrier (300). The lancet device (10 ') may be reused by inserting a new needle carrier (300) into the front slider (200 ') and then inserting the front slider (200 ') into the front opening (110 ') of the syringe (100 ').

With this process, the replaceable lancet device (10') according to the present disclosure may be reused by replacing only the needle carrier (300), thereby minimizing waste of resources due to the consumable parts.

Further, the retraction grip portion (240 ') allows the front slider (200') to be easily coupled with the cylinder (100 ') and allows the front slider (200') to be easily removed from the cylinder (100 ') by gripping the retraction grip portion (240') even when separated.

Furthermore, the lancet device (10 ') includes an actuating spring (400) which elastically pushes the needle carrier (300) in a forward direction and a rear cap (500) which is pressed against the actuating spring (400) to generate an elastic force, so that the lancet device (10') can perform blood collection based on the elastic force of the spring.

Claims

1. A replaceable lancet device comprising:

a tubular barrel including a front opening;

a needle unit inserted into the front opening of the cylinder and slidably movable along an axial direction; and

an actuation spring urges the needle unit in the needle cylinder outwards in a resilient manner in the front end direction.

2. The replaceable lancet device of claim 1, wherein the barrel comprises a retraction opening that opens laterally from the front opening in a predetermined longitudinal section to expose the needle unit or that is cut in a predetermined section along a longitudinal direction to guide retraction of the needle unit.

3. The replaceable lancet device of claim 1, wherein the needle cartridge comprises a rear opening and further comprises a rear end cap disposed to open and close the rear opening and in contact with a rear end of the actuation spring.

4. The replaceable lancet device of claim 3, further comprising a needle depth adjustment member disposed between the barrel and the rear end cap to adjust a position of the rear end cap in the axial direction.

5. The replaceable lancet device of claim 4, wherein the needle depth adjustment member comprises a screw guide portion formed in the barrel and an engagement moving portion provided in the rear end cap and engaged with the screw guide portion.

6. The replaceable lancet device of claim 3, further comprising:

a stopping sleeve interposed between the cylinder and the rear cover to rotate together with the rear cover, and including a locking blocking portion formed between the stopping sleeve and the cylinder and causing rotational resistance based on engagement between the stopping sleeve and the cylinder.

7. The replaceable lancet device of claim 2, wherein the needle unit comprises:

a tubular front slider inserted into the cylinder and movable in the axial direction, and including a front end partially exposed from an end of the cylinder; and

a needle carrier including a carrier body supporting a needle for blood collection so as to protrude in a front end direction and be movably accommodated in the front slider in the axial direction, a plurality of elastically deforming portions extending rearward from the carrier body and being elastically deformable inward in a radial direction, and an interlocking holding projection protruding from the elastically deforming portions in a direction transverse to the axial direction, held in a rear end of the front slider, and moved together with the front slider when moved rearward.

8. The replaceable lancet device of claim 7, further comprising:

a stopper protruding inward in the radial direction of the front slider and maintained to be held in the interlocking holding projection; and

an anti-separation protrusion is provided in the needle carrier, is held in the stopper, and prevents the needle carrier from being separated in a rearward movement direction.

9. The replaceable lancet device of claim 7, further comprising a buffer spring mounted to a front face of the needle carrier and extending longer than a protruding length of the needle.

10. The replaceable lancet device of claim 7, further comprising a back-up locking groove provided in one of an inner wall of the barrel and an outer wall of the front slider, and a back-up locking portion provided on the other of the inner wall of the barrel and the outer wall of the front slider, locked to the back-up locking groove, and enabling the front slider to move within a certain range.

11. The replaceable lancet device of claim 7, wherein the front slider further comprises a retraction grip portion to grip and retract an end of the front slider inserted into the barrel.

12. The replaceable lancet device of claim 11, wherein the retraction grip portion is connected to the front slider via the retraction opening and is exposed to an outside of the barrel or annularly surrounds the barrel.

13. The replaceable lancet device of claim 7, wherein

The syringe includes a trigger portion disposed therein, an

A ramp provided in one of the trigger portion and the elastically deforming portion provided in the needle carrier inwardly deforms the elastically deforming portion when the needle carrier is retracted.

14. A needle unit of a replaceable lancet device comprising a tubular barrel, comprising:

a tubular front slider inserted into the cylinder and movable in an axial direction, and including a front end partially exposed from an end of the cylinder; and

15. The needle unit of the replaceable lancet device comprising a tubular cartridge of claim 14, further comprising:

a stopper protruding inward in a radial direction of the front slider and maintained to be held in the interlocking holding protrusion; and

16. The needle unit of the replaceable lancet device including a tubular barrel of claim 14, further comprising a buffer spring mounted to a front face of the needle carrier and extending longer than a protruding length of the needle.

17. The needle unit of the replaceable lancet device including a tubular cartridge of claim 14, further comprising a back-up locking portion disposed in an outer wall of the front slider and enabling the front slider to move only within a certain range in the syringe.

18. The needle unit of the replaceable lancet device including a tubular barrel of claim 14, wherein the front slider further comprises a retraction grip portion to grip and retract an end of the front slider inserted into the syringe.

19. The needle unit of the replaceable lancet device including a tubular cartridge of claim 18, wherein the retraction grip portion is connected to the front slider via a retraction opening and is exposed to an outside of the syringe or annularly surrounds the syringe.

20. The needle unit of the replaceable lancet device including a tubular cartridge of claim 14, wherein the front slider includes a protruding coupling portion to prevent the needle carrier from being separated in a rearward direction.