KR101577162B1 - Plastic safety lancet with depth-controlled structure - Google Patents

Abstract

The present invention relates to a plastic safety lancet. The present invention includes: a needle part including a support surface, supported on the skin of a user, and a stabbing needle protruding from the support surface; a lancet body including a holder part in which the needle part is installed, a spring part storing elastic force to launch the needle part, a push part receiving pressure to store the elastic force in the spring part, a hanging piece supported in a cut hole formed in a housing, and a switch part formed to pressurize the hanging piece exposed to the cutting hole; the housing storing the lancet body, including a through hole to launch the needle part, and including a cutting hole, guiding and supporting the hanging piece; and a fixing protrusion and a fixing groove, which fix the push part to the housing while the elastic force is stored in the spring part since the push part is pushed by the housing and the lancet body.

Description

PLASTIC SAFETY LANCET WITH DEPTH-CONTROLLED STRUCTURE < RTI ID = 0.0 >

The present invention relates to a lancet for collecting a small amount of blood or body fluids, and more particularly, to a lancet for collecting a small amount of blood or body fluids. More particularly, the present invention relates to a lancet for collecting a small amount of blood or body fluids, , And is capable of preventing any reuse.

A lancet for collecting a small amount of blood or body fluids is very important to reduce the pain associated with perforating the skin.

In particular, diabetic patients are repeatedly subjected to blood collection for blood sugar check, and the pain caused by such repeated use is very large.

There are four major factors affecting pain during blood collection.

The thickness (cross-sectional area) of the lancet needle, the penetration depth, the vibration of the projectile, and the pulling of the skin by the hydrophilic metallic material.

However, the conventional lancet structure has a limitation in reducing such pain.

A related prior art is Korean Patent Laid-Open No. 10-2009-0059081 (published on June 10, 2009) 'Lancet System'.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lancet capable of reducing inconvenience of a user due to a varying depth during use and unnecessary pain caused thereby by manufacturing the lancet to have a constant impingement depth.

Another object of the present invention is to provide a lancet which can reduce the pain of the user when the stabbing needle is made of a hydrophobic plastic material.

It is still another object of the present invention to provide a lancet having a constant impingement depth by using a structure of an insertion preventing jaw integrated with a stinging needle.

Another object of the present invention is to provide a plastic safety lancet which can not be reused arbitrarily once it is used.

It is still another object of the present invention to provide a plastic safety lancet which is made entirely of plastic material and which is inexpensive and easy to dispose of.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a needle assembly including a needle portion including a support surface supported by a user's skin and a prick needle protruding from the support surface, a spring connected to the needle portion, A lancet body including a lancet body including a lancet body including a lancet body and a pushing portion to which a pressing force is applied so that an elastic force can be stored in the lancet body and a lancet body having a through hole through which the lancet body is fired, And the housing has a stepped portion at which the latching piece is supported so that the latching piece is supported at the stepped portion and elastic force is stored in the spring portion, And the needle portion is fired by the elastic force stored in the spring portion. Provide a safety lancet.

And a triple rejection unit for pressing the latch piece caught by the step.

At this time, the lancet body and the housing may be formed as a single injection mold.

In addition, the present invention provides a surgical instrument comprising: a needle portion including a support surface supported by a user's skin and a stinging needle protruding from the support surface; A lancet body including a holder portion to which the needle portion is mounted, a spring portion to store an elastic force to which the needle portion is fired, and a pressing portion to which a pressing force is applied to store the elastic force in the spring portion; And a housing which houses the lancet body and has a through hole through which the needle part is fired, wherein the holder part includes a latch piece, the housing has a step to which the latch piece is supported, Wherein the holder is supported in a stepped manner so that the holder can be temporarily fixed to the frontal position of the foot inside the housing, and the pressing part has a tree rejection for pressing the latching part so that the latching part can be moved out of the step .

And a reuse preventing hook extending from the pressing part and not being detached from the housing once inserted into the housing.

The reusing prevention hook is formed on the pressing portion so that the pressing portion can not be separated from the housing when the pressing portion is inserted into the housing. The reusing prevention hook is formed on the holder portion, And a second reuse-preventive hook that prevents the first reuse-preventive hook from retracting into the position.

The needle part may further include a protective cap for protecting the prick needle.

According to another aspect of the present invention, there is provided a surgical instrument comprising: a needle portion including a support surface supported by a user's skin and a stinging needle protruding from the support surface; A spring portion to which the elastic force of the needle portion is stored; a pressing portion to which a pressing force is applied to allow the elastic force to be stored in the spring portion; and a holding portion And a switch unit configured to press the latch piece exposed to the incision hole; And a housing having a through hole for receiving the lancet body and having a through hole through which the needle part is fired and having a cut-out hole for guiding and supporting the latch piece, wherein the pushing part is pressed on the lancet body and the housing, And a fixing protrusion and a fixing groove for fixing the pressing portion to the housing in a state where an elastic force is stored in the spring portion.

Preferably, the switch unit is aligned with the latch piece and exposed to the outside of the housing while the elastic force is stored in the spring unit.

The safety lancet according to the present invention has an effect of preventing the length deviation of the needle portion from being generated by manufacturing a plastic material by injection molding. In addition, it provides a structure that can not be reused when used once, thereby providing an effect of preventing arbitrary reuse.

The lancet according to the present invention has a structure in which the support surface is supported and stopped on the skin surface, so that the stinging needle can smoothly stop using the elasticity of the skin, thereby eliminating the cause of pain due to vibration Bring it.

In the lancet according to the present invention, the stabbing needle is made of a hydrophobic plastic material, thereby reducing the user's pain.

In addition, the lancet according to the present invention is formed of a plastic material as a whole, thus facilitating recycling.

1 is an exploded perspective view showing a plastic safety lancet according to a first embodiment of the present invention,
FIG. 2 is an enlarged perspective view of a needle part of a plastic safety lancet according to a first embodiment of the present invention. FIG.
FIG. 3 is a perspective view showing a plastic safety lancet according to a first embodiment of the present invention, FIG.
4 is an exploded perspective view of a plastic safety lancet according to a second embodiment of the present invention,
5 is a perspective view showing a plastic safety lancet according to a second embodiment of the present invention,
6 is a perspective view of a plastic safety lancet according to a third embodiment of the present invention,
7 is an exploded perspective view of a plastic safety lancet according to a third embodiment of the present invention,
FIG. 8 is a partially cutaway perspective view for explaining a pre-pawl state of a plastic safety lancet according to a third embodiment of the present invention, and FIG. 9 is a perspective view illustrating a plastic safety lancet according to a third embodiment of the present invention, Is a partially incised perspective view.
FIG. 10 is an exploded perspective view showing a plastic safety lancet according to a fourth embodiment of the present invention, FIG.
11 and 12 are perspective views showing a plastic safety lancet according to a fourth embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning and the inventor shall properly define the concept of the term in order to describe its invention in the best possible way It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. It should be noted that the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that various equivalents and modifications are possible.

FIG. 1 is an exploded perspective view showing a plastic safety lancet according to a first embodiment of the present invention, FIG. 2 is an enlarged perspective view of a needle part of a plastic safety lancet according to a first embodiment of the present invention, FIG. Is a perspective view of a plastic safety lancet according to a first embodiment of the present invention.

As shown, the plastic safety lancet according to the first embodiment of the present invention includes a lancet body 100 including a needle part 110 and a housing 200 housing the lancet body 100.

Referring to FIG. 2, the needle unit 110 includes a support surface 112 supported by a user's skin, and a stabbing needle 114 protruding from the support surface.

The lancet body 100 includes a spring part 120 connected to the needle part 110 and storing an elastic force to which the needle part 110 is fired and a spring part 120 for pressing the spring part 120 And a pressing part 130 to be applied.

The plastic safety lancet according to the present invention is characterized in that the entirety is formed of a plastic material. The lancet body 100 including the needle unit 110 is entirely made of a plastic material, and the housing 200 is entirely made of a plastic material.

Particularly, in the case of the needle part 110, it is preferable to use a plastic material having elastic modulus (ASTM D-638 standard) of 1.0 GPa or more. This is the strength required to prevent the stinging needle 114 from being broken or crushed and damaged during penetration of the skin.

The material used for manufacturing the needle part 110 may be ABS, PC, ASA, COC, LCP, PA, PAI, PAN, PAR, PBT, PC, PEEK, PEI, PESU, PET, PMMA, POM, PP, PPA, PPE, PPS, PPSU, PS, and SAN.

Of these materials, materials of LCP, PA, PC, PEEK, PEI, PI, PMMA, POM, PPSU and SAN are more preferable.

The above materials may contain glass fiber as a reinforcing material.

At this time, the glass fiber used as the reinforcing material is preferably 15 mm or less in diameter and 5 mm or less in length.

If the diameter of the glass fiber impregnated with the reinforcing material exceeds 15 μm, the reinforcing material can not penetrate the stabbing needle portion, so that the reinforcing effect of the stabbing needle 114 becomes insignificant.

Even if the length exceeds 5mm, the reinforcement will not penetrate the stinging needle properly.

In practical range, it is preferable that the diameter of the glass fiber is in the range of 10 to 14um. Glass fibers of less than 10 um are expensive and relatively poor in strength reinforcement.

The content of the reinforcing material is preferably in the range of 5 to 10% of the total weight. When the content of the reinforcing material is less than 5%, the strength reinforcing effect is insufficient. When the content of the reinforcing material exceeds 10%, the formability is deteriorated.

The needle unit 110 includes a supporting surface 112 supported by the user's skin and a stinging needle 114 protruding from the supporting surface 112. The length of the stinging needle 114 is 0.1 mm To 5 mm.

When the length of the stinging needle 114 is less than 0.1 mm, the probability of failure in blood collection increases, which is undesirable. A length exceeding 5 mm is undesirable because the stinging needle 112 may be damaged.

The length of penetration into the user's skin for blood collection is preferably between 0.3 mm and 1.5 mm. If a separate projectile is used, the penetration depth can be adjusted by using a projectile. In this case, Length is required.

The remaining portion of the lancet body 100 excluding the needle part 110 may be made of a plastic material different from the needle part 110. The remaining portion of the lancet body 100 and the housing 200 may be made of materials having a strength lower than that of the needle portion 110. A plastic material having an elastic modulus of less than 1.0 GPa and a coefficient of friction of not more than 0.2 mu can be used as the standard of strength. More specifically, materials such as EVA, PE, LDPE, HDPE, PP, and PTFE can be used.

In order to form the needle part 110 integrally with the lancet body 100, the remaining part of the lancet body 100 may be formed by molding an insert part after the needle part 110 is formed, 110 may be manufactured by molding the lancet body 100 and then joining the needle portions.

3, when the lancet body 100 is coupled to the housing 200, the pushing part 130 protrudes toward the rear of the housing 200 as shown in the upper part of FIG.

When the pushing part 130 of the lancet body 100 is pushed into the housing 200 after the through hole 210 of the housing 200 is brought into close contact with the blood collecting part and the pushing part 130 is pressed, (120) is deformed and elastic force is stored. This is because the engaging piece 140 formed adjacent to the back of the needle part 110 is caught by the step 220 of the housing 200. When the pressing part 130 is continuously pressed, the tree reject 150 presses the engaging piece 140. When the engaging piece 140 is fully pressed by the triple rejection 150 and is moved out of the step 220 of the housing 200 The needle part 110 is fired by the elastic force stored in the spring part 120 into the through hole of the housing 200 to perform blood collection.

FIG. 4 is an exploded perspective view showing a plastic safety lancet according to a second embodiment of the present invention, and FIG. 5 is a perspective view showing a plastic safety lancet according to a second embodiment of the present invention.

The second embodiment of the present invention is the same as the first embodiment except that the housing 200 is divided into two lancet bodies. In the first embodiment, the lancet body 100 is formed as a single part, but the second embodiment is characterized in that the lancet body is divided into two parts.

The lancet body according to the second embodiment of the present invention is characterized in that the needle part 110, the retaining piece 140 and the spring part 120 are formed as a single part, And the spring portion 120 is formed to be coupled to the pushing portion 130. As shown in FIG.

The functions and roles of the respective parts are the same as those of the first embodiment described above, so duplicate descriptions are omitted.

FIG. 6 is a perspective view showing a plastic safety lancet according to a third embodiment of the present invention, and FIG. 7 is an exploded perspective view showing a plastic safety lancet according to a third embodiment of the present invention.

The third embodiment of the present invention shows a configuration in which the needle part 300 is formed separately from the lancet body 400. In other words, a plastic safety lancet is formed by the assembly of three parts (needle part 300, lancet body 400 and housing 500).

The needle unit 300 and the lancet body 400 are independently formed and then the needle unit 300 is fitted to the lancet body 400 by being engaged with each other. The needle portion 300 and the lancet body 400 may have protrusions and grooves corresponding to each other.

In addition, the needle unit 300 according to the present embodiment includes a protective cap 310 for protecting the stinging needles. The protective cap 310 is removed just prior to use to prevent damage and contamination of the stinging needles.

The needle part 300 is formed of a plastic material including a support surface and a stinging needle, except that the needle part 300 further includes a protective cap 310. The needle part 300 is the same as the previous embodiments.

The lancet body 400 includes a holder 410 on which the needle 300 is mounted, a spring 420 on which the elastic force of the needle 300 is stored, And a pushing part 430 to which a pressing force is applied so as to be stored.

The holder 410 and the pressing part 430 are connected by the spring part 420 so that the relative distance between the holder part 410 and the pressing part 430 may vary .

The holding part 410 is formed with a latching part 440 which is hooked on a step formed in the housing 500 and the latching part 440 is pressed against the pressing part 430, And a tree rejection 450 that allows the user to pass through the tree.

The lancet body 400 according to the present invention includes a reuse preventing hook 460 that prevents the lancet body 400 from being detached from the housing 500 once the lancet body 400 is inserted into the housing 500.

The reuse preventing hook 460 is formed on the pushing portion 430 so that the pushing portion 430 can not be separated from the housing 500 when the pushing portion 430 is once inserted into the housing 500 A second reuse preventing hook (461) formed on the holder part (410) side to prevent the holder part (410) from being retracted to a pre-boot state after the needle part (300) 462).

The third embodiment is characterized in that the reuse preventing hook 460 is formed in a wedge shape so that it can not be retreated once inserted into the housing.

FIG. 8 is a partially cutaway perspective view for explaining a pre-pawl state of a plastic safety lancet according to a third embodiment of the present invention, and FIG. 9 is a perspective view illustrating a plastic safety lancet according to a third embodiment of the present invention, Is a partially incised perspective view.

The plastic safety lancet according to the third embodiment of the present invention is configured such that the needle part 300 is assembled to the lancet body 400 and inserted into the housing 500 and then the protective cap 310 of the needle part 300 is pulled And the pusher 430 is pushed to use.

8, when the needle part 300 is assembled to the lancet body 400 and inserted into the housing 500, the first re-use preventive hook 461 formed on the push part 430 is inserted into the inner part of the housing 500 And passes through the first reuse prevention protrusion 561

The first reusing prevention hook 461 is formed in a wedge shape and can advance and pass through the first reuse prevention protrusion 561 but can not retreat and pass through the first reuse prevention protrusion 561. [ Therefore, once the lancet body 400 is assembled into the housing 500, the lancet body 400 can not be separated from the housing 500 without damaging the housing 500, thereby preventing reuse.

At this time, the latching piece 440 formed on the holder part 410 is supported by the step 540 formed on the housing 500, and the second reuse preventing hook 462 formed on the holder part 410, Prevention protrusions 562 in the state where the first reuse preventing protrusions 562 are formed.

8, when the pressing part 430 exposed to the outside of the housing 500 is pressed, the holding part 410 is caught by the step 540 in the housing 500 The pressing part 430 approaches the holder part 410 so that the spring part 420 is compressed and elastic force is stored in the spring part 420. [ When the pressing part 430 continuously approaches the holder part 410, the tree rejecting part 450 formed on the pressing part 430 presses the holding part 440 of the holder part 410. When the tree rejection 450 is pushed to the state where the latching piece 440 can pass through the step 540 by pressing the latching piece 440, the elastic force stored in the spring part 420 causes the holder part 410 to rotate, The needle portion 300 fixed to the front portion of the housing is fired in front of the housing. The second reuse preventing hook 462 formed on the holder 410 at the time of firing passes through the second reuse preventing protrusion 562 so that after the firing, The reuse prevention hook 462 is supported by the second reuse prevention protrusion 562 so that the holder portion 410 can not retract into the pre-paw state.

In summary, when the pushing part 430 is inserted into the housing 500 once by the first reusing prevention hook 461, it can not be separated into the housing 500, and by the second reuse prevention hook 462, The holder portion 410 can not be restored to the pre-pawl state, thereby making it impossible to reuse the safety lanyard.

In order to guide the movement direction of the lancet body 400 in the housing 300, it is preferable that the housing 500 and the lathe body 400 have guide grooves into which protrusions and protrusions are inserted. In the illustrated embodiment, protrusions are formed in the holder 410, the spring 420, and the pressing part 430, and these protrusions are formed to be inserted into the guide grooves 502 in the housing. Therefore, the holder 410 and the spring 420 can be linearly moved only in a desired direction within the housing.

10 is an exploded perspective view illustrating a plastic safety lancet according to a fourth embodiment of the present invention.

The plastic safety lancet according to the fourth embodiment of the present invention is characterized in that loading and firing operations are separated. In the above-described embodiments, the pushing portion is pushed into the housing to perform the charging and discharging operations. However, the present embodiment provides a structure in which the pushing portion is pressed and loaded, and then the switch portion is pressed to launch the needle portion.

The plastic safety lancet according to the present embodiment includes a needle unit 600 including a support surface supported on the user's skin and a stinging needle protruding from the support surface, a lancet body 700 on which the needle unit is mounted, And a housing 800 having a through hole through which the needle 600 is fired, receiving the body 700.

The lancet body 700 according to the present embodiment includes a holder 710 to which a needle is to be attached, a spring 720 to store an elastic force to which the needle is fired, A locking part 730 and a locking part 740, and a switch part 750 configured to press the locking part.

Also, as in the third embodiment, the reusing prevention hook 760 prevents the lancet body 700 from being separated when the lancet body 700 is inserted into the housing 800 once.

The switch unit 750 performs a function similar to that of the tree rejection of the previous embodiments, but is not exposed to the outside of the housing in the case of tree rejection, but is inserted into the housing and formed to press the latching piece 740, The switch unit 750 is exposed to the outside of the housing 800 and differs in terms of being pressed by the user.

The housing 800 includes a through hole 810 through which the needle 600 is fired, a cutout hole 820 for guiding and supporting the catching piece 740, (830).

11 and 12 are perspective views showing a plastic safety lancet according to a fourth embodiment of the present invention.

12 shows a state where the lancet body 700 is inserted into the housing 800. When the lancet body 700 is inserted into the housing 800 and the pressing portion 730 is pressed, It shows the loading status. The reinsertion prevention hook 760 is inserted and fixed in the locking hole 840 when the pressing portion 730 is pushed into the housing 800 so that the loading state is maintained even if the pressing portion 730 is no longer pressed.

11, the engaging piece 740 is held at the end of the incision hole 820. At this time, the switch part 750 is aligned with the upper side of the engaging piece 740, Exposed state.

11, when the switch part 750 is pressed, the latching part 740 is no longer supported by the cutting hole 820, so that the spring part 720 is resiliently restored and the needle part 600 penetrates And is launched into the ball 810.

It is to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the appended claims rather than by the foregoing detailed description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims, as well as any equivalents thereof, be within the scope of the present invention.

100, 400, 700: lancet body
200, 500, 800: Housing
110, 300, 600:
310: Protective cap
120, 420, 720: spring portion
130, 430, 730:
140, 440, 740:
150, 450: deny tree
750:
460, 760: Reuse prevention hook
461: first reuse prevention hook
462: first reuse prevention hook

Claims (10)

delete delete delete A needle portion including a support surface supported by the skin of the user and a stinging needle protruding from the support surface;
A lancet body including a holder portion to which the needle portion is mounted, a spring portion to store an elastic force to which the needle portion is fired, and a pressing portion to which a pressing force is applied to store the elastic force in the spring portion; And
And a housing for receiving the lancet body and having a through hole through which the needle is fired,
Wherein the holder has a locking piece and the housing has a step to which the locking piece is supported so that the locking piece is supported by the step so that the holder can be temporarily fixed to the frontal position in the housing,
Wherein the pressing portion includes a tree rejecting portion for pressing the engaging piece so that the engaging piece is out of the step,
And a reuse preventing hook extending from the pressing part and not being detached from the housing once inserted into the housing,
The reuse-
A first reuse preventing hook formed on the pressing portion to prevent the pressing portion from being detached from the housing when the pressing portion is inserted into the housing;
And a second reuse preventing hook formed on the holder portion to prevent the holder portion from being retracted to a position in front of the foot after the holder is fired.
delete delete 5. The method of claim 4,
Wherein the needle portion further comprises a protective cap for protecting the stinging needle.
delete delete 5. The method of claim 4,
Wherein the needle portion is made of a plastic material having an elastic modulus of 1.0 GPa or more.

Images