TRIGGER MECHANISM FOR A SAMPLE COLLECTION DEVICE AND SAMPLE COLLECTION DEVICE INCLUDING THE SAME

Abstract

The present invention relates to a trigger mechanism for a sample collection device, the trigger mechanism comprising a trigger element and a preloaded plug with a blade, whereas the trigger element is relatively movable to the plug, the trigger mechanism being configured to release the preloaded plug with the blade for perforating a user's skin for blood collection, the trigger element further being arranged to be activated and moved relatively to the plug by an activation force created by a skin part being vacuum-sucked into the sample collection device and pressing directly or indirectly against the trigger element.

Claims

1. A trigger mechanism for a sample collection device, the trigger mechanism comprising a trigger element and a preloaded plug with a blade, whereas the trigger element is relatively movable to the plug, the trigger mechanism being configured to release the preloaded plug with the blade for perforating a user's skin for blood collection, the trigger element further being arranged to be activated and moved relatively to the plug by an activation force created by a skin part being vacuum-sucked into the sample collection device and pressing directly or indirectly against the trigger element.

2. The trigger mechanism according to claim 1, wherein the trigger mechanism comprises at least one deformable and/or partially elastic element, which is configured and arranged to create at least partially a counterforce against the activation force.

3. The trigger mechanism according to claim 2, wherein the deformable and/or partially elastic element is a beam.

4. The trigger mechanism according to claim 3, wherein the beam has a connecting end, which is connected to a main body of the trigger element, and a free end, wherein the free end has a smaller cross-section than the connecting end.

5. The trigger mechanism according to claim 4, wherein the deformable and/or elastic element has a cross section which is set to be minimum in the proximity of the end portion of the deformable and/or partially elastic element, and gradually increases towards the first end.

6. The trigger mechanism according to claim 4, wherein the trigger element has a main body and the beam is formed integrally on the main body.

7. The trigger mechanism according to claim 1, wherein the trigger element is arranged eccentrically and/or is asymmetrically formed.

8. The trigger mechanism according to claim 5, wherein the trigger element has a slot formed between the main body of the trigger element and the beam.

9. The trigger mechanism according to claim 8, wherein the slot has a first end and a second end, wherein a hook-shaped positioning portion is formed in the proximity of the second end of the slot.

10. The trigger mechanism according to claim 5, wherein a pin is formed at an end portion of the deformable and/or elastic element and is configured to be inserted into a counterstructure for positioning and/or force control purpose.

11. The trigger mechanism according to claim 10, wherein the counterstructure is groove, especially groove in a cap.

12. The trigger mechanism according to claim 1, wherein the trigger mechanism has a cap.

13. The trigger mechanism according to claim 12, wherein the cap is arranged between trigger element and plug.

14. The trigger mechanism according to claim 12, wherein between cap and plug a spring is arranged, whereas the spring is configured and arranged to pre-load the plug.

15. The trigger mechanism according to claim 9, wherein an opening is defined between the end portion of the deformable and/or partially elastic element and the hook-shaped positioning portion.

16. The trigger mechanism according to claim 1, wherein the trigger element is configured to be activated with a force between 2N and 5N.

17. The trigger mechanism according to claim 10, wherein the pin is integrally formed with the deformable and/or partially elastic element.

18. The trigger mechanism according to claim 11, wherein the cap and the plug are made of polypropylene and/or the trigger element is made of HDPE and/or polycarbonate.

19. A sample collection device for extracting and collecting a sample of a fluid of a user, the sample collection device comprising: the trigger mechanism according to claim 1; an outer shell; an inner shell having a pierceable membrane, wherein a pre-packaged vacuum is sealed in a first chamber defined between the outer shell and the inner shell, and a partially elastically deformable push button section, including a center portion having a sharp piercing element for piercing the pierceable membrane of the inner shell when a pushing force is applied on the push button section, for allowing releasing of the vacuum in a second chamber, defined by the inner shell, wherein, when the vacuum is released in the second chamber and the user's skin is deformed and at least partially sucked into the sample collection device, the trigger element is configured to be activated to release the preloaded plug for perforating the user's skin for fluid collection.

20. A trigger element for a trigger mechanism according claim 1, comprising the trigger element features.

Description

[0055] The invention will be better understood with the aid of the description of an embodiment given by way of example and illustrated by the figures, in which:

[0056] FIG. 1 shows a cross-section view of the outer part (i.e. outer and inner shell with a piercable membrane) a sample collection device for extracting and collecting a sample of a fluid of a user, according to an embodiment of the invention (here without the trigger mechanism and the sample collection container/sample collection tube);

[0057] FIG. 2 shows a partial cross-section view of a trigger mechanism for a sample collection device, according to an embodiment of the invention;

[0058] FIG. 3 shows a perspective view of a cap of the trigger mechanism according to the embodiment;

[0059] FIG. 4 shows a front view of a trigger element of the trigger mechanism according to the embodiment;

[0060] FIG. 5 shows a perspective view of the trigger element of FIG. 4;

[0061] FIG. 6 shows a perspective view of the detail of an elastic element of the trigger element of FIG. 4;

[0062] FIG. 7a-d several views of a plug of the trigger mechanism according to the embodiment of FIG. 2;

[0063] FIG. 8a-d several views of a further embodiment of a plug suitable to be used for the trigger mechanism according to the embodiment of FIG. 2;

[0064] FIG. 9a-c further cross-sectional views of the embodiment of the plug according to FIG. 8a-d; and

[0065] FIG. 10 a perspective view of a further embodiment of a cap.

[0066] FIG. 1 shows a cross-section view of the outer part a sample collection device 100 for extracting and collecting a sample of a fluid of a user, according to an embodiment of the invention (here without a trigger mechanism).

[0067] FIG. 2 shows a trigger mechanism for the sample collection device 100, according to an embodiment of the present invention.

[0068] The trigger mechanism comprises a trigger element 400 and a preloaded plug with a blade 600. The blade 600 has the function of a knife and is intended to act as a cutting element for cutting through the skin of the patient.

[0069] The trigger element 400 is relatively movable with respect to the plug 500, and is configured to release the preloaded plug 500 with the blade 600 or knife 600 for perforating a user's skin for fluid collection (e.g., blood collection).

[0070] Specifically, the trigger element 400 is configured to be activated and moved relatively to the plug 500 by an activation force created by a skin part being vacuum-sucked into the sample collection device 100 and pressing, directly or indirectly, against the trigger element 400.

[0071] Advantageously, the trigger element 400 is configured to be activated with a force between 2N and 5N. A well-suited value would be for example 4N.

[0072] Thus, the trigger element 400 may be easily activated by the skin part that is vacuum-sucked and deformed into the sample collection device 100, and which directly or indirectly exerts a pressure against the trigger element 400.

[0073] At the same time, undesired activation of the device before the skin of the user is sufficiently in-sucked and deformed into the device 100 can be prevented.

[0074] In the illustrated embodiment, the trigger mechanism advantageously comprises at least one deformable and/or partially elastic element 402.

[0075] Specifically, the deformable and/or partially elastic element 402 is configured and arranged to create, at least partially, a counterforce against the activation force.

[0076] In the illustrated embodiment, the deformable and/or partially elastic element 402 is a beam 402 (FIGS. 5-6).

[0077] Preferably, the beam 402 has a connecting end, which is connected to a main body 403 of the trigger element 400, and a free end, which is smaller in diameter than the connecting end. This way, the beam 402 has a connecting end, which is connected to a main body 403 of the trigger element 400, and a free end, wherein the free end has a smaller cross-section than the connecting end.

[0078] More preferably, the beam 402 has a cross section which is set to be minimum in the proximity of the end portion 4020 of the beam 402, and gradually increases towards the first end 4011 (FIGS. 4 to 6).

[0079] The provision of a gradually increasing cross section of the beam 402 towards the first end 4011 allows reducing the risk of breaking of the beam 402 when a pushing force is exerted.

[0080] In the illustrated embodiment, the trigger element 400 has a main body 403, and the beam 402 is formed integrally on the main body 403.

[0081] For example, the main body 403 and the beam 402 may be integrally formed through injection molding.

[0082] The trigger element may be arranged eccentrically and/or may be asymmetrically formed.

[0083] In the illustrated embodiment, as shown in FIGS. 4 to 6, the trigger element 400 has a slot 401, formed between the main body 403 of the trigger element 400 and the beam 402.

[0084] Advantageously, the slot 401 has a first end 4011 and a second end 4012, and a hook-shaped positioning portion 4013 is formed in the proximity of the second end 4012 of the slot 401.

[0085] Accordingly, positioning of the trigger element 400 can be facilitated. Moreover, stability during use can be further improved.

[0086] In the illustrated embodiment, a pin 4021 is formed at an end portion 4020 of the deformable and/or elastic element 402 (cf. FIGS. 4-6).

[0087] The pin 4021 is configured to be inserted into a counterstructure for positioning and/or force control purpose.

[0088] Preferably, the counterstructure is a groove. More preferably, the counterstructure is a groove formed in a cap 550.

[0089] In the illustrated embodiment, the trigger mechanism 400 includes a cap 550 (FIG. 3).

[0090] The cap 550 is arranged between trigger element 400 and plug 500.

[0091] A spring may be arranged between cap 550 and plug to pre-load the plug 500.

[0092] In the illustrated embodiment, as shown in FIGS. 4-5, an opening 4014 is defined between the end portion 4020 of the deformable and/or partially elastic element 402 and the hook-shaped positioning portion 4013.

[0093] Advantageously, the pin 4021 may be integrally formed with the deformable and/or partially elastic element 402.

[0094] The cap 550 and the plug can be made of polypropylene.

[0095] The trigger element 400 can be made of polycarbonate. Alternatively, it can be made of HDPE and/or polycarbonate.

[0096] A part of the sample collection device 100 according to an embodiment of the invention is shown in FIG. 1.

[0097] The sample collection device 100 is configured for collecting a sample of a fluid of a user, in particular a bodily fluid, e.g. blood, in particular capillary blood.

[0098] The sample collection device 100 includes the trigger mechanism described above.

[0099] Furthermore, the sample collection device 100 comprises an outer shell 101.

[0100] Still further, the sample collection device 100 comprises an inner shell 102, having a pierceable membrane 1021 (e.g., an Aluminium membrane).

[0101] A pre-packaged vacuum is sealed in a first chamber 1000, defined between the outer shell 101 and the inner shell 102.

[0102] The sample collection device 100 further comprises an elastically deformable push button section 200.

[0103] Specifically, in the illustrated embodiment, the push button section 200 includes a center portion 201 having a sharp piercing element 300 for piercing the pierceable membrane 1021 of the inner shell 102 upon applying a pushing force on the push button section 200, so as to determine releasing of the vacuum in a second chamber 1001, defined by the inner shell 102.

[0104] The release of the vacuum in the second chamber 1001 determines deformation of the user's skin, such that the skin is at least partially sucked into the sample collection device 100 and the trigger element 400 is activated to release the preloaded plug for perforating the user's skin for fluid collection (e.g., blood collection).

[0105] FIG. 7a-d show several views of a plug 500 of the trigger mechanism according to the embodiment of FIG. 2.

[0106] As can be seen FIG. 7a, which is a side view of the plug 500, the plug 500 has a mounting plateau 502 for mounting and holding the blade 600 (not shown in FIG. 7a-d).

[0107] For mounting the blade 600, there are two mounting pins 504, which hold the blade 600. The pins 504 are integrally formed parts of the plug 500. It is formed by means of injection moulding.

[0108] The pins 504 are then connected and fixed to the blade for fixation of the blade to the plug 500 e.g. by means of heat-stacking and/or pressing and/or heating and/or (partially) welding or the like.

[0109] Adjacent to this and connected to the mounting plateau 502, there is chamfer section 506.

[0110] The chamfer section 506 has the following function:

[0111] During the rotation of the plug 500 with the blade 600 the chamfer is not interfering and touching the wound, which is created by the blade 600 and needed for blood collection.

[0112] Further, the plug 500 has a sealing ring 508, which is integrally formed to the other end of the plug 500 being opposite to the mounting plateau 502.

[0113] The sealing ring 508 has a collar-like form. Further, the sealing ring 508 is arranged with some distance and in parallel to the main body 510 of the plug 500. It is used to closed and seal the blood container after sample collection, by e.g. just pressing the plug into the opening of the blood sample container (not shown). The blood sample container can be e.g a cylinder-shaped tubular container (with one opening), being held by the inner shell.

[0114] The sealing is done radially with a sealing lip 512 arranged at the end of the sealing ring 508.

[0115] As can be further seen from FIG. 7d, the plug 500 also comprises loading grooves 514 being formed into the connecting section 516 between the main body 510 and the sealing ring 508.

[0116] The loading grooves 514 extend in width at one end to accommodate easier with a loading tool during manufacturing.

[0117] In the middle of the main body 510 there is a septum 518 made of e.g. an elastomer (or any other suitable material). The septum can be mounted to the plug 500 by means of e.g. overmoulding or press-fit or any other suitable manufacturing method.

[0118] FIG. 8a-d show several views of a further embodiment of a plug 1500 suitable to be used for the trigger mechanism according to the embodiment of FIG. 2.

[0119] The plug 1500 has the identical and/or similar feature in terms of structure and function like the plug 500 shown in FIG. 7a-d. The same elements/features are therefore denotated with the same reference number, but increased in value with thousand (value+1000).

[0120] FIG. 9a-c show further cross-sectional views of the embodiment of the plug according to FIG. 8a-d.

[0121] The following difference exists:

[0122] The chamfer section 1506 is increased and more material is cut away from the main body 1510. By this, the possible interference of the plug 1500 with the wound can be further reduced and the possible blood collection volume during the time frame of blood collection can be increased.

[0123] In the shown embodiment of FIG. 8a-c, the chamfer section 1506 extends from the outer wall of the main body 1510 to almost the middle line of the main body 1510, as can be e.g. seen from FIG. 8d.

[0124] The angle of the chamfer is here chosen in the range 15-40, here approx. 30.

[0125] Also the chamfer section 1506 ends below the mounting plateau 1502 and thus has a chamfer-step form.

[0126] In the angle of the chamfer according to the embodiment shown in FIG. 7a-d is much steeper, and chosen in the range of approx. 65-80, here approx. 75.

[0127] Also, there is no step in the chamfer section 506.

[0128] The chamfer of the chamfer section 506 extends from the outside of the main body 510 to the mounting plateau 502.

[0129] There are on the mounting plateau 502 two shoulders 503.

[0130] The chamfer extends to the shoulders 503, which are arranged half the way to the inside from the outer wall toward the middle line of the main body 510.

[0131] FIG. 10 shows a perspective view of a further embodiment of a cap 1550. The cap 1550 has all the structural and functional features as the cap 550 describe above.

[0132] The following difference exists:

[0133] The cap 1550 comprises a deformable and/or elastic element 1552, which is integrally formed to the cap 1550.

[0134] It has the function of the deformable and/or elastic element 402 as described above. The overall device is then adapted accordingly.

REFERENCE SIGNS USED IN THE FIGURES

[0135] 100 Sample collection device [0136] 101 Outer shell [0137] 102 Inner shell [0138] 200 Push button section [0139] 300 Piercing element [0140] 201 Center portion of the push button section [0141] 400 Trigger element [0142] 401 Slot of the trigger element [0143] 402 Deformable and/or elastic element [0144] 403 Main body of the trigger element [0145] 500 Plug [0146] 502 Mounting plateau [0147] 503 Shoulder [0148] 504 Pin [0149] 506 Chamfer Section [0150] 508 Sealing Ring [0151] 510 Main body [0152] 512 Sealing lip [0153] 514 Loading Groove [0154] 516 Connecting Section [0155] 518 Septum [0156] 550 Cap [0157] 600 Blade/Knife [0158] 1000 First chamber [0159] 1001 Second chamber [0160] 1021 Pierceable membrane of the inner shell [0161] 1500 Plug [0162] 1502 Mounting plateau [0163] 1504 Pin [0164] 1506 Chamfer section [0165] 1508 Sealing ring [0166] 1510 Main body [0167] 1512 Sealing lip [0168] 1514 Loading Groove [0169] 1516 Connecting Section [0170] 1518 Septum [0171] 1550 Cap [0172] 1552 Deformable and/or elastic element [0173] 4011 First end of the slot [0174] 4012 Second end of the slot [0175] 4013 Hook-shaped positioning portion [0176] 4014 Opening [0177] 4020 End portion of the deformable element [0178] 4021 Pin