DE1938870C3 - Device for drawing blood from the fingertip - Google Patents

Description

(12) and the horizontal branch of the bridge is held by at least one support (13) on which the hammer) (17) rests freely and which can be displaced against the force of at least one spring (14), and with the hold-down device (8) a stop (8 c) is provided. whose path produced when the hold-down device is pivoted intersects the path of the free end (17 a 17 b) of the hammer lever (17) produced when the hammer lever (17) is pivoted.

7. Apparatus according to claim 6, characterized in that the end face (17 a) of the Striker lever (17) has a circular contour, the center of curvature with the The axis (7) of the hold-down device (8) coincides when the hammer (17) is in a central position between riots on the bed

(13) on the one hand and the contact with the horizontal branch of the bridge (12) on the other hand and wherein their radius of curvature is slightly larger than the distance between the Pivot axis (7) of the hold-down device (8) and the part furthest away from this axis of the stop (8 c).

8. Device according to one of claims 1 to 7, characterized in that in the drive (19 , 20 a, M or 43, 44, M) for power supply of the motor (M) at least one through a fixed to the hold-down device (8) connected contact piece (8 d) operable interrupter (10) and at least one interrupter (16) operable by a sensor in the bore (12 c) by means of the test tube (15, 32) is provided.

9. Device according to one of claims 1 to 8, characterized in that a translucent sample tube (15,32) and a photocell (A, C) is provided in the bore (12 c), the photocell via an electronic amplifier (T ₁ bis.T ₄ , R ₂ ) is connected to the electromagnet (23, 24, 31, 31a).

K). Device according to claim 1, characterized in that the fixation (41, 45) enclosing the finger comprises a stationary support (45) and a movable bracket (41), the hold-down being designed as a U-shaped bracket with the support between the legs (45) is arranged, and the bracket is pivotably mounted on an axis (43), the axis (43) being eccentrically connected to a drive motor (M) via a drive axis (44).

The invention relates to a device for taking blood from the fingertip with use

Tnchti

1 S38

a sample tube with a funnel made of elastic Material which has cutting lancets protruding at its base in the direction of its opening

The invention ^lie 8 ^{l for its} object the carrying out of the blood sampling from the Pjneerkuppe on semi-automatic manner, ie without inter vention from the outside, and to allow the following phases: E.nschnitt the epidermis and the skin of Figure 10 the electrical circuit diagram for. Control of the device,

F i g. 11 and 12 two vertical cuts of one Sample tube used when using the device and

13 to 16 detail viewers. the variant in the cut.

The device shown (Fig. 1 to 9 comprises a housing 1, which is on the one hand by a Bo-

f " J ^ 'Π1 * 4- V.« «" i »ji_o tin vj ^ jiciuab λ, cried?» ciuei3i <ii:> uuiui ^ iii ^ ii l> \ j-

the finger provided for taking blood, local io the 2nd, which is formed by a rectangular plate. Massage the finger above this incision, and on the other hand through a lid 3, which is to cause the blood to flow towards this incision, and collecting the blood in
a sample tube.

The collection of blood from the fingertip can be carried out in the following ways: After disinfection of the finger is the skin of the finger with the help of a cutting lance at a depth of about between two and three millimeters punctured whereupon a first drop of blood emerges, the one relative contains a large amount of fluid derived from the subcutaneous cells and which can be, for example removed by absorption using a cotton swab. The pricked finger is then stimulated by periodic massage in the direction of the incision made by the lancet and collects the blood emerging from this incision in a test tube, m a capillary or by acidification in a tube.

is removably attached to the ground, is formed.

The bottom 2 and the cover 3 are preferably made of synthetic resin.

The lid 3 is on its front, on its

Top and cut out on its back: On its front by a circular Window 3 '(Fig. 2). to form a passage for a pusher 4, the purpose of which follows is explained;

On its back by a rectangular cutout 3 r>. which extends from the upper surface of the lid to the lower edge of the rear side and wherein a block 5, which is fastened with its underside on the plate 2, is provided in the free space formed. On its top through two parallel slots 3 c, which begin along the upper edge of the cutout 3 b and extend towards the front of the lid, through a first circular window 3d, which is attached in front of the slots 3 c, through a second rectangular window 3 e, which leaves a passage for a support 6, the purpose of which is explained below, and through two rectangular and parallel slots 3 /. which open in the part of the cover 3 between the window 3 e and its front side and wherein the slots 3 / are contained in two planes, which are directed at the same time perpendicular to the front and to the back of the cover and contain the aforementioned slots 3 c.
On the upper part of the block 5 is on the swivel

The different stages of blood collection are usually carried out by specialized personnel carried out, although different of them in particular the preparation of the finger to be applied, could easily be carried out by the patient himself.

The invention has as its object the various to carry out a blood sample ' to automate the necessary actions from the fingertip so that such a removal is direct by the person from whom the blood is to be drawn, practically without intervention by suitable staff.

For this purpose, the invention has as an object a device of the type mentioned ™ _{"wn.," Itll uca U1UIW, "m ai, Subtitle JUlwwlll} vtiei aei a bore for receiving the Proberoh- 45 axle 7 is a holding-down device 8 angclcnkt which a res in which this is easily displaceable and from the box-shaped middle part "with a U-shaped transverse shaft it protrudes with its lower end, which on a section of its when it is with its funnel at the upper end of the length on its inner surface by a pad"; execution is applied, one is covered on the lower end of the sample synthetic foam. The hold-down device is attached to an impact device that acts on the pro 50 of the pivot axis? by means of two tabs Hb bcfeberonr a sudden movement in the direction is sustained, which is granted in the plane of the two legs of the ner longitudinal axis, a corset-like part S α of the fingers and a fixation that surrounds one another by a rod, which holds a hold-down so- 8c (Fig . 1) are connected. One of the brackets Hb as one engages at least on the second phalanx carries a switching piece HJ, which is intended to include a support, and a drive to actuate the pcriodi- 55 tcrbrcchc ·· K), which on the plate 2, see varying the Contact pressure of the fixation adjacent to the block 5, is attached when the and a lock for the hold-down device is provided.

The drawings illustrate, for example and very schematically, an embodiment and a variant of the device. Ls shows

F i g. 1 is a perspective view showing, partly in phantom, the essentials Parts of the device illustrated

FIGS. 2 to 9 show cross sections of this device, 65 in order from its in FIG. 2 in which in A-elche show the various layers which the FIG. 4 to be brought to the position shown, or parts of the device leading to the blood sample - vice versa,
can take. On the swivel axis? is also a Rik-k-

if

The hold-down device is brought into a certain angular position by pivoting about the pivot axis 7 as explained below.

The distance / wipe DiMi Clear 8 corresponds to the ft of the slots 3c of the housing, ismi their strength is the Hieitc of the slots, so that the tabs can slightly smaller than slightly into the slots 3 c occur when the holding-down device is pivoted beispiels-

Position 11 attached, on which the rod 8 c can attack from the moment when the hold-down device in the in F i g. 3 position shown and was brought beyond this position (F i g. 4 to 6).

At the end opposite the articulation end, the middle part 8 a of the hold-down device 8 has two tabs 8 e, which each lie in the plane of one of the legs of this part and have a slightly curved profile with the center in the pivot axis 7. The distance between the center line of each tab 8 e and this axis is exactly equal to the distance between the pivot axis 7 and the center of each slot 3 /; In addition, these tabs have a distance from one another which corresponds to the distance between the slots 3 /; in addition, their width and their thickness are somewhat smaller with respect to the length and the width of the said slots, so that when the hold-down device 8 is pivoted, for example into the position shown in FIG. 4 to be brought to the position shown, his tabs 8 a freely enter the slots 3 /, if necessary even over their length. The outer edge of the tabs Sc of the hold-down device has a saw-like toothing 8 /.

In front of the block 5, the plate 2 of the device has a bridge 12, each vertical arm of the bridge having a slot 12a, between the edges of which one end of a support 13 is slidably inserted, which is the action of two springs 14 acting on either side the bridge and are attached in their upper part to a corresponding protrusion 12b , is subject.

The horizontal arm of the bridge 12, which extends below the window 3 d of the cover, has four holes as follows:

A first bore 12 c, which connects the upper and lower surfaces of the horizontal branch and opens exactly opposite the window 3d . The bore is intended to receive a test tube 15 for collecting the blood, the details of which are explained in more detail below with reference to FIGS. 11, and the lungs of the bore being smaller than that of the test tube body.

! • -inc second bore 12c /, which partially penetrates the horizontal branch and opens into bore 12c. It is intended to receive a control pin of a breaker 16 attached to the bridge 12, the purpose of which is explained below. F.inc third bore 12 (Fig. 1) and a fourth bore 12 / (Fig. 2), which each penetrate the horizontal branch and at a level which is higher than that of the bore 12 d , into the bore 12r flow out. The holes 12 r and 12 / are coaxial. They are intended to form a holder for a photovoltaic cell Γ on the one hand (12a) (FIGS. 1 and 10) and for an electric lamp A, which is used to illuminate the cell, on the other hand (12 /) (FIG. 10) .

Between the vertical branches of the bridge 12, a hammer 17 is arranged, which by means of a Axis 18, which is attached with its ends in the branches, is articulated and made of a material with a relatively high specific weight, for example brass or copper.

This Schlaghcbc! rests on support 13 and has a cranked nose 17 ″. whose linden tree carries a groove 17 t. The width of the hammer 17 is smaller than the distance between the tabs 86 of the hold-down device 8.

The bridge 12 is arranged on the plate 2 in such a way that the middle plane of the bridge in which the cuts, which objects of FIG. 2 to 9 have been carried out, the center plane of the hold-down device 8 is also at the same time. Moreover, the length of the spring 14, the 18 chosen the striking lever 17 and the location of its ίο axis of rotation so that upon pivoting of the blank holder 8 in the direction F (Fig. 2) on the one hand by its rod 8 c circular path described the hammer 17 , and in particular his nose 17 o (Fig. 2) touches and on the other hand the circular path which describes the end of the nose when the hammer lever is _{pressed by the rod 8c under tension of the springs 14 in the direction F 1} , from that of the Rod removed before the latter touches the block 5. and in particular the bottom of the notch 5 a of the block (Fi g. 3).

It follows from this that when the hold-down device 8 is tilted in the direction F (FIG. 2), the springs 14 tensioned as soon as the rod 8 c of the hold-down device touches the hammer 17 and that this tensioning itself continues until the moment when the circular paths of the rod and the end of the hammer 17 do not meet cut more, d. H. something after the rod 8 c has entered the retaining groove 17 ft of the hammer (Fig. 3).

If one then continues to move the hold-down device 8 further in the direction F , the rod 8c leaves the hammer 17, which, having become free and only subjected to the action of the springs 14 , is pivoted violently in the opposite direction to F ₁ , ie in the direction of the bore 12 c of the bridge 12, while striking the end cap of the trial tube 15 (Fig. 4). The result of such a stroke movement is explained below.

As described, the device shown has a support 6 on its upper side, which protrudes beyond the housing through a window 3 e mounted in it, the upper side of this support having a V-shaped groove 6 a. The support is attached to the end of a lever 19 on an eccentric not shown, soft the secondary shaft 20 α of a reduction gear, of which only the wheel 20 is visible in the drawing and which is controlled by an electric motor M drives.

The lever 19 has a nose 19a which is suitable for engaging the end of a rocker arm 21 which carries the armature 22 of a relay whose coil is denoted by 23 and whose magnetic core is denoted by 24. The rocker 21 is hinged at 21 α to another Hebei 25, which in turn is hinged at 25 a to a block 26 which is attached to a plate 27 which also carries the motor M and on the bottom 2 of the device by means of a base plate 28 rests.

The lever 25 has at its free end a Ouerbolzen 29, which is excluded over its entire length at 29 α. in order to form a step that is sufficiently fine to be able to block the hold-down device in the depressed position by engaging this step in the toothing 8 / tabs 8 ^ (Figs. 4 to 6).

A spring support 30, which is fastened with one end to the support 26 and with the other

Ä.v '■; »-I

7 8

The end rests on the bolt 29, the latter holds in the ver of them: In fact, the attraction releases the locking position. The magnetic core 24 and its rocker 21 due to the field generated by the magnetic core coil 23 are mounted in the opening of a support frame 31, 24 and the coil 23, two lathes 8 on one of its sides caused by the bolt 29 Offer 31 α to fix this frame on the lever 5 ricgclung so that the bracket protrude under the action 25, these tabs lifting the lever on the reset 11, and pinch the switching piece 8 c / both sides. leaves the breaker 10, which opens.

The support 26 has a bore 26a, which can achieve the same result as described

with respect to the pusher 4 is arranged coaxially pressing the pusher 4 can be achieved what the

and opens towards the lever 25, the io representation of a pusher 4 *, the movable

Bore 26 α is intended to be a sliding rod 26 ft, contact of the interrupter 10 * directly touches, cr-

the one with its ends in contact with the lever and clears.

with the pusher 4 is to be recorded. Thanks to this in an analogous manner, the function of the down-arrangement is possible, the lever 25 by a holder 8, as far as this organ determines the closing of the UnDruck in direction F., on the pusher 4 to its 15 breaker 10 , by the arrow 8 * symboli-articulation axis 25 a and against the effect of the siert.
To pivot the spring retainer 30 in the direction F ₂ . As shown in Fig. 10, the electrical

The rocker 21 can have two specific positions in a circuit of the device, which consists of a source

Depending on whether the coil 23 has voltage lcÄ ', it is replaced by a series of batteries that are in

lies or not. 20 a housing attached to the plate of the bottom 2

In the position, which is accommodated, for example, in FIGS. 1 and 2, (FIG. 1), is formed, is visible and the current is supplied in a non-excited state, an amplifier with four Tran coil 23 corresponds, the rocker 21 is under the sistors, two of them, T ₁ and T ₂ , the type npn and effect of their own weight on a pin 21 ft two, T ₃ and T ₄ , the type pnp and a bar, which is attached to the housing of the Motor M is attached. In 25 stood R ₂ , which can not be controlled by the photoelectric ZcIIeT of this position, the nose 19 α of the lever 19 and is intended to come into contact with the swing arm 21, which position of the coil 23 if it the said cell lung also gives a signal to this from the lever 19 during its Ex-.

Zcntcrbcgwegung at a certain point in time. The ZcIIeT and the lighting device

should be taken. 30 (light source) A are intended to represent the moment

When the coil 23 is energized, this pulls to determine in which a sample tube 5 made of transparent

caused by the magnetic core 24 field the like or translucent material, which

Anchor 22, whereby the rocker 21 is around its in the bore 12r of the bridge 12, sufficient

Axis 21a pivots and a raised position contains blood, the cell sending a different signal

occupies (F i g. 6 and 7), in which its end gives itself 35 when it comes from the whole of the lamp A

on the path of the nose 19 a of the lever 19 is located. The amount of light received or only part of it

It follows that when the nose has the wing crowd, especially when the collected blood

21 touches (Fig. 7), it takes it with it, which in the test tube the level of the generated by the lamp.

Pivoting in the direction F ₂ about the axis 25a th light beam is achieved. It should be noted

the entire unit causes the rocker 40 that the supply of the lamp A, which via a

21, the frame 31, which the coil 23 and its resistance R _x takes place only when the

Magnetic core 24 carries, and the lever 25 and the breaker 10 and 16 are closed, ie only

Includes bolt 29. If the hold-down device is in, then if the hold-down device 8 is tilted down

nei "is the depressed position in which it is position (FIG. 4) and when a trial tube is in the

through the engagement of the bolt in the toothing 8/45 bore 12 r of the bridge 12 is inserted. The same thing

its lugs Se is held, the same applies to the motor M, which only receives voltage.

Loosen bolt 29 from this toothing, and that when the breakers are closed.

Hold-down 8 is then only the effect of its So reaching the level of I.ichtstrah-

Provision 11 suspended and directed through les, whichever from the lamped to the photoelectric

Swiveling in the opposite direction F 50 cell T goes through the total in a sample tube

wicder (F i g. 2). the blood had the effect that the breaker 10

An analogous result can be obtained by pressing the will open and the motor M will stop.

Pusher 4 in the direction F, which is the unit that the transistors T ₁ to T ₄

the displacement of the slide bar 26 b, in the drawing and the resistors R _x and A ₂ , is in one

voltage from right to left, and that to 55 housing B, which is attached to the plate 27, un-

Notching of the rod 29 necessary pivoting of the accommodated.

Lever 25 in the direction F ₂ causes. Before explaining how the pre-

The power supply of the motor M, the lamp A direction should be briefly explained the sample tubes,

and the coil 23 is made possible by a circuit which is suitable for taking blood and the

light, which is shown in Fig. 10 and in which 60 collection of the blood (Fig. U) to be used

the breakers 10 and 16, with the reference numerals den.

10 * and 16 *, the photoelectric cell C, the spool Such sample tube comprises a body 32 from 23 and its magnetic core 24 and the pusher 4, the transparent or translucent material, is designated by the Bezngszeichen 4 * z to find. B. made of polyethylene, in the opening is a spout. The representation of parts 4, 10, 23 and 24 ent- 65 33 is inserted, which is the lower part. n \ r Does not correspond to reality what their relative conclusion. a funnel, the cup-shaped position of which in the described device is concerned, the collecting container is denoted by 35 and which is made of, however , precisely from the point of view of function, any plastic and elastic material. This

Funnel rests aiii the round of the opening (mouth) of the body 32. by means of an annular part

35 c /, which is attached to the base of the chalice 35, on. The wall of the cup and that of the spout 33 have a cutout in the form of an L-shaped groove

36, which forms a channel that allows the air contained in the body of the sample tube to escape depending on the extent (depending on) the filling of the same with a liquid wedge, in particular with blood, made possible.

A capillary cannula protrudes from the lower L-.ndc of the nozzle 33 37 out, which extends into the vicinity of the testicle of the body 32, coaxial with this is and lies in its course in the extension of the opening of the spout 33. The spout 33 and the cannula 37 form a one-piece whole made of synthetic resin.

At the bottom of the cup 35, the funnel 34 has an annular groove 35 b in which the edge part of a circular plate 38 made of metal, for example stainless steel, is held, which has two triangular lancets 38 a and 38 /), which are perpendicular to the plate on both sides of a window 39 cut into it.

Over the plate 38 is an annular tampon 40 made of absorbent material, e.g. B. made of absorbent paper, arranged, which is attached to the lancets 38 ″ and 38 by being pushed onto the same. As shown, the opening of the tampon 40 and the window 39 of the plate 38 are opposite one another and arranged in line with the central bore of the grommet.

The part of the lancets 38 ″ and 38 b which protrudes over the tampon 40 has a length of at least two to three millimeters, and their tip extends to a level which is below the level of the upper edge of the cup 35.

The lancets are designed to make the incisions that are essential for taking blood into the skin, as explained below.

The operation of the device will now be described.

When the hold-down device assumes the position shown in FIGS. 1 and 2, a sample tube 15 is inserted through the window 3 d of the housing into the bore 12 r of the bridge 12, the sample tube resting on the bridge with its cup-shaped collecting container while its lower linden tree protrudes into the free space formed between the vertical branches of the bridge, as shown in FIG. This results in the closing of the interrupter 16, while the interrupter 10 remains open.

After the person's finger has been cleaned and disinfected with diluted alcohol before it is made the subject of a blood sample, in particular on the fleshy part of the first phalanx (under the nail), the user places his hand on the upper side of the housing 1 of the device, he places the finger with its disinfected part of the mouth of the cup of the sample tube and, with a part of the first and second phalanx, in the V-shaped groove because of the support. 6

The hold-down device 8 is then pivoted into the

Direction / · 'to move it from the position according to FIG. 2 in the according to F i g. 4 bring.

At the beginning of this pivoting, namely when the tabs He of the hold-down device to both Sci-; ten of the finger , the rod 8 c comes into contact with the upper surface of the nose 17 α of the hammer 17, the lever being _{pushed back in the direction F 1} , which tensions the springs 14. When the rod enters the groove 17 / »the nose 17 a, the occur

ίο Lugs He of the hold-down device through the slots 3 / into the housing 1 without, however, still being in the area of the locking bolt 29. It is precisely in this position of the hold-down device 8 that the stop 8 c begins to be supported on the position 11.

Then comes the moment when the rod Hc exposes the hammer 17 to the action of the springs 14 so that it is moved in the opposite direction and hits the end cap of the sample tube 15 (FIG. 4), which, like described, in the bore 12c of the bridge 12 can slide axially. However, since the sample tube is now being held back by the finger provided for taking the blood, its body 32 is displaced in the direction of the impact of the blow applied to it.

Hung on the finger and causes the elastic bending of the calyx 35, the lancets 38 a and 38 b being pushed into the flesh of the finger at a depth corresponding to the protruding length of the lancets, cutting the epidermis and skin.

Be Ben (Fig. 12).

As soon as the hammer 17 has given up all of its kinetic energy to the sample tube, it exercises no more force on the sample tube and falls back on the support 13, so that after the finger

was cut, the lancets 38a and 386 and the body 32 of the trial tube by the action of the elastic cup 35, which wants to regain the shape it had before its deformation - Kii, back down in the drawing.

be pressed (Fig. 11). This has the consequence that the lancets 38 α and 38 b are pulled out of the finger, but they remain at a small distance from the incisions which they caused.

When striking, the hold-down 8 assumes the position according to FIG. 4, in which it rests with the padding 9 on the upper part of the first and second finger members, and the retaining bolt 29 engages in the toothing 8 / the tabs 8 e of the bracket and the switching element 8 d has caused the interrupter 10 to close: the control circuit of the device (FIG. 10) receives voltage, the motor M rotates, the lamp A and the cell C are supplied with electrical energy.

The finger intended for taking the blood is now held in a real "corset", which is secured on the one hand by the support 6 and on the other hand by the middle part 8 α of the hold-down device 8, which is covered with the synthetic foam padding, and the two flaps 8 c is formed, the contact pressure, in particular in the plane according to Fig. 4, is variable. In fact, the contact pressure depends on the position that the support 6 assumes, which is caused by the motor AI in an eccentric movement in the direction F (Fig. 4 ), and by pulling the end of the finger used to take the blood periodically from back to front and back or upwards

11 12

ascending and descending direction, depending on whether the gaze is raised from where it is at the horizontal branch of the

it approaches the end or moves away from it, butts bridge.

is moved. As can be seen, shows the underside of the nose 17 a

It follows from the fact that the finger periodically of the hammer 17 has a rounded profile, the

a kind of massage from back to front through the center of curvature 5 exactly with the

Sammcndrüekcn his on the support 6 aulliegen- axis 7 of the support 8 coincides as soon as the

the part is subjected, this massage lever in the in F i g. (S position shown was brought

the blood flowing in this part in the direction of and whose radius of curvature is slightly larger than

Presses incisions through which it emerges in order to be in the absland between this axis and that of this

to drop the cup of the trial tube. io opposite surface of the stop 8 c.

The first drops of blood thus collected, it follows that, if the hammer 17 is contained in a large proportion of the physiological position described above. the Niedcrhal-liquid bcnachbar- from the incisions prevents ter8 nothing further to / ■ "entgegengeten subcutaneous cells comes and obviously corresponds continued to be vcrschwenkl direction must be fat in the. For this purpose, the sample - 15 position according to FIG. ¹ ), which corresponds to the starting position shown in tube 15 with an absorbent tampon 40, whereby steadily, which the first impure blood drops on the hose lever 17 at this moment on the takes, as a result of which the suitable blood does not fall back into the body support 13, where, as a result of the movement of the sample tube, before the tampon gc- of the hold-down device 8 the rod 8r has been sufficiently soaked to a level which is higher than that of the Euide, it should be noted that the lancets of the nose 17 'of this lever.

Test tube to a very large extent this. Thus, the device described is easier to drain again, since, although it is at a distance for a new blood sample,
In a variant of the embodiment, which remain newly created incisions in FIG Fingers intended for blood collection touch their tips with blood droplets and hold the end of the sample on the sample tube and are subjected to a massage which determines the incisions over their surface after they are torn off rapidly in the flow of blood in the direction of the finger produced in the direction of the outlet opening of the funnel 34 ßcn. Thus, the lancets of the sample tube the 30 will play, on the one hand, by a clamp-like down role of real collectors and thus prevent holder 41 in the form of an inverted U, which with a useless distribution of blood inside his neck through not shown slots in the calyx of the Container. the interior of the housing 42 of the device

If the mirror is the one collected in the sample tube. where it is attached to an axle 43 and rises high enough in blood to guide the cells, which interrupt the light beam emitted by the output wave 44, a motor M ( not shown) causes an eccentric in the manner described the Errc movement is offset, and on the other hand by a movement of the coil 23, so that the rocker 21 is provided in the support 45, which is drawn on the housing between the upper position (FIG. 6) and the legs of the hold-down device 41 and Hold-down from the caused by the bolt 29 on which the person to whom the blood abnormal engagement comes free and in the in F i g. 7 of the men should be brought to their designated finger drawing position shown. lays, educated. At the bottom of the hold-down is one

It follows from this that the interrupter 10 opens upholstery 46 made of synthetic foam.

and as a result of this, the motor M and the lamp Λ arranged with which the hold-down device is attached to the finger

no longer due to tension: the massage of the 45 applies.

Fingers that had the blood drawn stops, The way like with this hold-down

and the finger is no longer wedged between the massage the finger is performed is in the

the hold-down 8 and the support 6, so that shown in FIGS. 13 to 16, in soft the hold-down

Using his hand to remove the device tcr 41 is shown in four different positions each.

can. 50 with the shaft 44 each time opposite the previous

As shown in Figs. Was the product passing position 3 provides to 7, increases by 90 rotated further, such a position bcrohr into the device. The invention is not based on what is shown and

that it would be particularly difficult to limit it to what has been described: so in particular the

Fingers for example at his funnel to grab device, which only from the point of view a;

ready for use with the collected blood 55 portable, battery-powered apparatus

to remove. In the case of the device described, it was used in the same way as a fixed Appa

However, this removal will be at least partially developed and for this purpose mi

wisely effected in a mechanical way. electrical energy directly from a distribution network;

For this purpose, it is sufficient to continue to raise the hold-down device 8.

ben to put it in the in F i g. 8 position shown in relation to 60. In the case of the device described, one can Pro

bring. Due to this additional displacement of the pipes, which other technical properties are used

Hold-down strikes the rod 8 c from below to have the shafts than those that the sample tube The nose 17a of the hammer lever 17 and lifts it, which is shown in FIG. 11, are inherent. This is in

by a shift in the angle in F _1, this is particularly the case with a large part of the sample

opposite direction (Fig.2), the lever 65 tubes, which in the laid-open specification 1938 871

in turn, the trial tube 15 up to that eye are described.

For this purpose 3 sheets of drawings

Claims (6)

Patent claims: 1. Device for taking blood from the fingertip using a sample tube with a funnel made of elastic material, which has cutting lancets protruding towards its opening at its base, characterized in that a bore (12c) for receiving the sample tube (15, 32), in which this is easily displaceable and from which it protrudes with its lower end when it rests with its funnel (34) at the upper end of the guide, a striking device acting on the lower end of the sample tube (13, 14,17), which the Test tube a sudden movement in the direction of its longitudinal axis, a fixation (6, 8 or 41, 45) enclosing the finger like a corset, a hold-down device (8 or 45) and a support (6 or 41) that engages at least the second finger quality comprises, and a drive (19, 20 a, M or 43, 44, M) for periodically varying the contact pressure :, the fixing and a lock (25, 29, 32) for the hold-down device en is. 2. Device according to claim I, characterized in that the hold-down device (8) is bow-shaped and the support (6) is block-like for attacking the finger at one end and is pivotably mounted on an axis at the other end, the axis eccentrically connected to a drive motor (M) via a drive shaft (20 a) and the support, for massaging the finger in the direction of the fingertip, can be moved, and the eccentric movement of the support through the hold-down device (8) and the bore (12 c) the plane formed to receive the sample tube is provided. 3. Apparatus according to claim 2, characterized in that the hold-down device (8) by a Axis (7) is provided pivotably, with the fingers released in one end position and the Sample tube can be removed from the guide or inserted into it (release position) and in the the other end position of the fingers is fixed and the hold-down device engages the lock (25,29,30) (Locked position), with a reset (11,8c) for pivoting the hold-down device is provided in the release position when releasing the lock. 4. Apparatus according to claim 3, characterized in that the hold-down device (8) has at least one tab (Se), the at least one longitudinal edge of which is provided with a toothing (8 /), and the locking device has a lever (25) which has a bolt (29) for engaging the toothing (8 /) of the tab (8e), an electromagnet (23, 24, 31, 31a) and a pivot axis (21a) in which a rocker (21) is mounted, one end of which (22) is provided as the armature of the electromagnet (23, 24, 31, 3Ia) and the other end of which is intended to attack a cam (19a) of the support (6), and the lever (25) against the force of a spring support (30) is pivotable about an axis (25 a). 5. Apparatus according to claim 4, characterized in that for pivoting the lever (25) around the axis (25 a) by hand a trigger (4,26 b) is provided. 6. Device according to one of claims 1 to 5, characterized in that the bore (12 c) is mounted in the horizontal branch of a bridge (12) between the support (6) and the pivot axis (7) of the hold-down device (8 ) is arranged that the striking device (13, 14,17) comprises a striking lever (17) which passes through the bridge, on the side of the bridge (12) facing away from the pivot axis (7) of the bracket (at 18) is pivotably articulated and with its free end (17 a, 17 b) protrudes over the other side of the bridge, the hammer (17) between the foot of the vertical branches of the bridge