US 9,282,919 B2 · Lancet pricking device

Abstract

A lancet pricking device comprises a lancet, a launching spring, a trigger part and a holder housing the lancet, launching spring and trigger part. The lancet comprises a lancet body, lancet cap and pricking needle. The pricking needle is in both the lancet body and lancet cap. The trigger part has a pair of arms positioned inside the holder. The launching spring is attached to the lancet body. The lancet body is secured to the arms of the trigger part by an abutment of the lancet body on the arms such that the launching spring is compressed before a pricking operation. The trigger part cannot be pushed further into the holder before the lancet cap is removed, but can be pushed further into the holder after the cap is removed. The pair of arms warp when pressed to release the secured lancet body.

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Drawings

Claims9

Dependent claims

A lancet pricking device, comprising:

a lancet;
a launching spring;
a trigger part;
and
a holder for housing therein the lancet, the launching spring and the trigger part,
wherein the lancet comprises a lancet body, a lancet cap and a pricking needle, and the pricking needle is disposed in both the lancet body and the lancet cap;
wherein the lancet body and the pricking needle of the lancet and the launching spring are positioned inside the trigger part such that all of them do not protrude beyond the trigger part;
wherein the trigger part comprises a pair of arms positioned inside the holder;
wherein the launching spring is attached to the lancet body, and the lancet body is secured to the arms of the trigger part by an abutment of the lancet body on the arms such that the launching spring is kept compressed before a pricking operation in a secured position;
wherein the trigger part cannot be pushed further into the holder before the lancet cap is removed from the lancet, and wherein the trigger part can be pushed further into the holder after the lancet cap is removed from the lancet;
wherein the arms of the trigger part are capable of warping upon the trigger part being pushed further into the holder after the lancet cap is removed to cause the lancet body to be released from the secured position;
wherein the trigger part is disposed as a whole inside the holder such that only a pricking opening portion provided at a front end of the trigger part protrudes outwardly from a front opening end of the holder;
wherein a front portion of the lancet cap protrudes outwardly from the front opening end of the holder, and a pair of parts provided at lateral sides of the front portion of the lancet cap is adjacent to the front opening end of the holder such that a backward movement of the lancet with respect to the holder is prevented;
wherein each of the arms of the trigger part has a front side serving as a fixed end and a rear side serving as a free end on which lateral sides of the lancet body is secured by abutting the pair of arms such that the launching spring is kept compressed before the pricking operation;
and
wherein when the trigger part is forced to move backwardly with respect to the holder upon the trigger part being pushed further into the holder after the lancet cap is removed, each arm of the trigger part is expanded outwardly to cause each of the lateral sides of the lancet body, which were secured by abutting the pair of arms, to be released from the pair of arms.

13 more elements

Dependencies are inferred from the claim text.

Description25,690 words

Summary5,344 words

#The present invention relates to a pricking device. More specifically, the present invention relates to a lancet pricking device which is used for taking a sample of body fluid such as blood.

#In order to measure a blood sugar level of a patient with diabetes, it is required to take a sample of the blood from the patient. The small amount of blood to be taken may be enough. Thus, a pricking device capable of taking a small amount of blood is used to measure the blood sugar level. The pricking device is generally composed of a lancet (see, for example, U.S. Pat. No. 5,385,571) and an injector. The lancet has a pricking needle capable of puncturing a predetermined region of the patient's body. The injector has a function of launching the lancet toward the predetermined region. The pricking device is set up for use by loading the lancet into the injector. Then, the lancet is launched toward the predetermined region by means of a plunger of the injector, whereby the predetermined region is pricked.

#The pricking device used for taking blood from the patient with diabetes is required to be suitable in terms of operability and safety. For example, it is desired that the device is easy to operate for pricking and an appropriate safety measurement is provided for the handling of the used lancet. In this regard, as for the used lancet, there may be the patient's blood adhered to the pricking needle due to the pricking. If the body of a person other than the subject of the blood sampling (for example, a nurse or medical practitioner who collects the blood sample) accidentally should touch the tip of the pricking needle, the body of such person may be pricked by the pricking needle. This will result in a wound of the body through which the patient's blood may enter the body (i.e., the body of the nurse or medical practitioner), and thus posing a risk of the infection disease.

Brief description of the drawings71 figures

#FIGS. 1(a) and 1(b) are views of an appearance of a lancet pricking device of Type A.

#FIG. 2 is views of an appearance of a lancet pricking device of Type A.

#FIG. 3 shows an appearance view and an exploded perspective view of a lancet pricking device of Type A.

Detailed description18,133 words

#100 Lancet 130 Lancet body 131 Engagement portion of lancet body (secured portion of lancet body) 133 Rear end of lancet 134 Pricking depth adjustment wing “a” provided in the lancet body 150 Pricking needle 150a Tip of pricking needle 170 Lancet cap 171 Cap arm of lancet cap 171a Tip of cap arm 175 Front portion of lancet cap 175a Pair of parts provided in front portion of lancet cap 175b Cap region (center region) between pair of parts provided in front portion of lancet cap 200 Holder (lancet holder) 203 Opening end of holder (pricking opening portion) 220 Inner wall surface of holder 222 Space generated around tip of arm of trigger part 230 Flange 250 Sloped portion provided at inner wall surface of holder 250a Sloped surface 260 Protrusion “d” provided at inner wall surface of holder 280 Protrusion 280a Front-sided face (sloped surface) of protrusion 280b Rear-sided face (pricking depth adjustment surface) of protrusion 300 Launching spring 400 Trigger part 420 Arm of trigger part (inner arm of trigger part) 420a Tip of arm 420a1 Tip surface of arm 421 Engaged portion provided in arm of trigger part (securing portion of trigger part) 423 Re-use preventing wing “c” provided in trigger part 440 Second arm of trigger part (outer arm of trigger part) 450 Fitting portion of trigger part (launching spring-attachment portion) 450a Protrusion provided in free end of spring-attachment portion 450a1 First protrusion provided in free end of spring-attachment portion 450a2 Second protrusion provided in fixed end of spring-attachment portion 455 Inner wall surface at rear end side of trigger part 460 Falling prevention wing provided in trigger part 500 Lancet pricking device of Type A

#100′ Lancet 108′ Weakened part 130′ Lancet body 131′ Engagement portion of lancet body (secured portion of lancet body) 133′ Rear end of lancet 136′ Front end surface of lancet body 138′ Protrusion 150′ Pricking needle 150a′ Tip of pricking needle 170′ Lancet cap 172′ Rear portion of lancet cap 175′ Front portion of lancet cap 175a′ Pair of parts provided in front portion of lancet cap 175b′ Cap region (center region) between pair of parts provided in front portion of lancet cap 200′ Holder (lancet holder) 202′ Front end of holder 203′ Opening of holder 210′ Rear end of holder 212′ Space 214′ Wall portion of holder 216′ Opening 217′ Front-sided surface (inclined surface) 218′ Protrusion (convex portion) 219′ Rear-sided end surface 250′ Sloped portion 250a′ Sloped surface of sloped portion 300′ Launching spring 302′ Front end portion of spring 304′ Rear end portion of spring 400′ Trigger part 402′ Front end portion of trigger part 404′ Rear portion of trigger part 406′ Space of trigger part 408′ Front end opening of trigger part 416′ Push-back portion 420′ Arm 421′ Engaged portion provided in arm of trigger part (securing portion of trigger part) 422′ Sliding portion 424′ Re-use preventing wing 426′ Falling prevention wing 432′ Wall surface of trigger part 450′ Hook-like spring engagement portion 450a′ Protrusion 450a1′ First protrusion provided in free end of spring-attachment portion 450a2′ Second protrusion provided in fixed end of spring-attachment portion 480′ Rear-most end portion 482′ Stepped portion 500′ Lancet pricking device of Type B 600′ Region of interest to be pricked

#100″ lancet 108″ Weakened part 130″ Lancet body 133″ Rear end of lancet body 136″ Front end surface of lancet body 138″ Protrusion 150″ Pricking needle 150a″ Tip of pricking needle 170″ Lancet cap 172″ Rear portion of lancet cap (i.e., cap body) 172a″ Lateral side of cap body 175″ Front portion of lancet cap 175a″ Pair of parts provided in front portion of lancet cap 175b″ Cap region (center region) between pair of parts provided in front portion of lancet cap 131″ Engagement portion of lancet body (secured portion of lancet body) 133″ Rear end of lancet 200″ Holder (lancet holder) 203″ Front end opening of holder 217″ Inclined surface 218″ Protrusion (convex portion) 219″ Rear-sided end surface of protrusion 250″ Sloped portion of holder 250a″ Sloped surface of sloped portion 270″ Rear end opening of holder 290″ Wall portion of holder 295″ Concave portion provided in holder wall 295a″ Wall surface forming the concave portion 295b″ Front sloped surface of concave portion 300″ Launching spring 400″ Trigger part 406″ Space of trigger part 420″ Arm of trigger part 421″ Engaged portion provided in arm of trigger part (securing portion of trigger part) 422″ Sliding portion 424″ Re-use preventing wing 426″ Falling prevention wing 430″ Lateral face of a main body 450″ Fitting portion of trigger part (hook-like spring engagement portion) 450a″ Protrusion 450a1″ First protrusion provided in free end of spring-attachment portion 450a2″ Second protrusion provided in fixed end of spring-attachment portion 451″ Rear end of trigger part 470″ Pressing portion at rear end of trigger part 490″ Flexible portion or flexible component (tongue-like portion or component) of trigger part 500″ Lancet pricking device of Type C

Facts

Application

14/330,764Filed 14 Jul 2014 · division

Priority

JP 2009-2334287 Oct 2009

Published

US 2015/0112375 A123 Apr 2015

Granted

15 Mar 2016

Term ends

9 May 2032

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification22 codes

A61B 5/1411
Devices for taking blood samples: by percutaneous method, e.g. by lancet
A61B 5/1405
Devices for taking samples of blood ; Measuring characteristics of blood in vivo, e.g. gas concentration within the blood, pH-value of blood:…
A61B 5/150022
Source of blood: for capillary blood or interstitial fluid
A61B 5/15019
Adjustment of penetration depth: depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel…

Family

PCT/JP2010/067529Parent of this division · filed 6 Oct 2010

US 2015/0112375 A1Pre-grant publication · published 23 Apr 2015

Application13/500,127Parent of this division

US 9,044,177 B2Parent of this division

US 2012/0215246 A1Published application

US 9,282,919 B2This patent

From the US filing history. Foreign family members aren’t listed.

Lancet pricking device

Life of this patent

Lancet pricking device

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims9

Description25,690 words

Drawings

Classification22 codes

Life of this patent

Description25,690 words