turning now in detail to the drawings , fig1 shows a hollow needle holder 1 having a long , cylinder - shaped hollow needle container 2 , which has an opening 3 , which can be closed , on the bottom face in the drawing . a hollow needle fixing device 4 , mounted from the inside , is arranged on the opposite , second face of hollow needle container 2 , and a commercially available hollow needle 5 , which projects all the way into hollow needle container 2 through hollow needle fixing device 4 , is screwed into it . in order to take a blood sample , the free end of hollow needle 5 is inserted into the vein of the patient and a blood sample tube , not shown , is set onto the end of hollow needle 5 that is located in hollow needle container 2 , through opening 3 . after the blood sample has been taken , the blood sample tube is pulled off again and hollow needle 5 is withdrawn from the vein of the patient . hollow needle holder 1 , together with hollow needle 5 , must now be disposed of . in order to preclude the possibility of a needle stick injury , hollow needle 5 must therefore first be introduced into hollow needle container 2 . for this purpose , opening 3 is first closed with a cap 6 , which is simply set on ( see fig2 ). afterwards , an unlocking mechanism 7 is activated , which is affixed to the second face of hollow needle container 2 and is configured so that hollow needle 5 drops into hollow needle container 2 after activation of unlocking mechanism 7 . unlocking mechanism 7 has a slide 8 having two arms 9 a , 9 b ( see fig3 ), which is held and guided by an angled projection 10 formed on hollow needle container 2 . projection 10 is formed on two opposite sides of hollow needle container 2 . in their underside facing hollow needle container 2 , arms 9 a , 9 b have grooves 11 a , 11 b that serve as guides . these grooves 11 a , 11 b engage with an anchoring device 12 of hollow needle fixing device 4 , which is formed by two flexible arms 13 a and 13 b , whereby arms 13 a , 13 b are configured on the side of hollow needle fixing device 4 and are each passed through an attachment opening 14 configured in the second face of hollow needle container 2 . wedge - shaped projections 15 a , 15 b that are directed outward , in each instance , are formed on the ends of arms 13 a , 13 b that project out of hollow needle container 2 , which projections engage with a step on the outside of the hollow needle container that is directed laterally to the outside , and narrow in wedge shape towards their end . wedge - shaped projections 15 a , 15 b engage in grooves 11 a , 11 b of slide 8 . in this connection , each groove 11 a , 11 b has a beveled side 16 that corresponds to the wedge shape of projections 15 a , 15 b and rests against projections 15 a , 15 b . grooves 11 a , 11 b start at a constant width at the free end of arms 9 a , 9 b , and narrow towards the segment of slide 8 that connects the two arms 9 a , 9 b , as can be seen in fig3 . if the essentially horseshoe - shaped slide 8 is pressed towards the center from its end that projects over the edge of hollow needle holder 2 , beveled sides 16 of narrowing grooves 11 a , 11 b exert a force on projections 15 a , 15 b , so that flexible arms 13 a , 13 b are pressed together inwards , until the steps of projections 15 a , 15 b lose their hold on the edge of attachment openings 14 and hollow needle fixing device 4 falls into hollow needle container 2 , together with hollow needle 5 . for this purpose , grooves 11 a , 11 b and attachment openings 14 are configured to be broader than projections 15 a , 15 b . in this connection , grooves 11 a , 11 b as well as the width of hollow needle fixing device 4 prevent hollow needle 5 with hollow needle fixing device 4 from falling off hollow needle holder 1 . if slide 8 is pressed further , its segment that connects arms 9 a , 9 b covers attachment opening 14 as well as a central passage opening 17 formed between attachment openings 14 , which can be seen in fig4 , which represents the second face of hollow needle container 2 . in this way , hollow needle holder 1 is reliably closed and any exit of the hollow needle accommodated in hollow needle container 2 is reliably precluded . fig5 shows the hollow needle fixing device 4 with flexible arms 13 a , 13 b in cross - section . in this connection , the central segment of hollow needle fixing device 4 has a passage 18 with an inside thread 19 that is accessible from the outside in the assembled state , into which commercially available hollow needles 5 can be screwed . the central segment of cylinder - shaped hollow needle fixing device 4 is adapted , with its outside diameter , to the inside diameter of passage opening 17 , so that hollow needle fixing device 4 rests against hollow needle container 2 there and is stabilized . as is evident from fig6 , flexible arms 13 a , 13 b are connected with the hollow needle holder by way of bridges . fig7 shows a second embodiment of a hollow needle holder according to the invention . the hollow needle holder 21 is similar to hollow needle holder 1 of the first embodiment described above , in terms of its fundamental structure . in particular , hollow needle fixing device 4 and hollow needle container 2 are configured in comparable manner . therefore no detailed description of these parts will be presented , and for the sake of simplicity , they are provided with the same reference symbols . hollow needle holder 21 has an unlocking mechanism 22 that differs from hollow needle holder 1 , which is equipped with two slides 23 a and 23 b , which are configured with the same construction . as is evident from fig7 , slides 23 a , 23 b are arranged on the second face of hollow needle container 2 . hollow needle fixing device 4 is mounted on the second face from the inside of hollow needle container 2 , as in the first embodiment . in this connection , each slide 23 a , 23 b has a recess 24 at its bottom , into which a projection 15 a , 15 b of flexible arms 13 a , 13 b of the hollow needle fixing device 4 is accommodated , in each instance . in this connection , wedge - shaped projections 15 a , 15 b rest against a beveled side 25 of recess 24 . slide 23 a , 23 b is configured in essentially rectangular manner , whereby one side is adapted to the rounded shape of hollow needle container 2 . in this way , slide 23 a , 23 b can rest completely on the face of hollow needle container 2 , and particularly does not project beyond it . the two slides 23 a , 23 b are held in place by means of a cap 26 having a central passage 32 to pass the hollow needle through . cap 26 is set onto the face of hollow needle holder 21 from the outside and surrounds slides 23 a and 23 b and fixes them in place . for this purpose , hollow needle container 2 is provided , on its top side edge , with a step 27 that faces towards the inside , onto which cap 26 can be set . in order to hold cap 26 in place , an elevation 28 is formed in the region of step 27 on the side edge of the housing , which elevation engages in a correspondingly formed groove 29 in cap 26 . detail views of step 27 and cap 26 are shown in fig9 , and 13 . in the operating position of hollow needle holder 1 , with hollow needle 5 screwed on and ready for use , slide 23 a , 23 b is arranged between hollow needle 5 and the edge of hollow needle container 2 so that the rounded edge of slide 23 a , 23 b aligns in coverage with the edge of hollow needle holder 2 . for activation of slide 23 a , 23 b , a nipple 30 that serves as a guide element is provided on its top ( see fig1 ), which is guided in a correspondingly configured groove 31 of cap 26 . groove 31 in cap 26 is configured in the shape of a double ring , as shown in fig1 , so that nipple 30 of each slide 23 a , 23 b is moved forward when cap 26 is rotated to the left or to the right , and thereby pushes slide 23 a , 23 b forward along with it . in this connection , beveled edge 25 of slide 23 a , 23 b pushes projections 15 a , 15 b of hollow needle fixing device 4 out of the anchoring device , so that hollow needle 5 , with the hollow needle fixing device , falls into hollow needle container 2 ( see fig8 ). after cap 26 is turned further by 90 °, slides 23 a and 23 b that are arranged opposite one another and suitably guided on the face of hollow needle container 2 come together in the middle and close passage opening 17 and attachment openings 14 . fig1 shows unlocking mechanism 22 in a top view . fig1 shows a third embodiment of a hollow needle holder 41 according to the invention , which is similar , in its fundamental structure , to hollow needle holder 1 of the first embodiment described above . hollow needle container 2 , and hollow needle fixing device 4 , in particular , are configured in comparable manner . therefore no detailed description of these parts will be presented , and for the sake of simplicity , they are provided with the same reference symbols . hollow needle holder 41 has an unlocking mechanism 42 that is different from hollow needle holders 1 and 21 , which can be seen in detail in fig1 . unlocking mechanism 42 contains two slides 43 a , 43 b having the same construction , which are arranged on opposite sides of hollow needle fixing device 4 and are held and guided by means of projections 44 molded onto hollow needle container 2 . when hollow needle fixing device 4 is inserted , beveled sides 45 of slides 43 a , 43 b rest against projections 15 a , 15 b that form the anchoring device of hollow needle fixing device 4 . in order to release hollow needle fixing device 4 from hollow needle holder 41 , the two slides 43 a , 43 b are pressed together towards the inside , towards one another . in this way , flexible arms 13 a , 13 b of hollow needle fixing device 4 are also pressed far enough together so that the anchoring of projections 15 a , 15 b is released and hollow needle fixing device 4 , with hollow needle 5 , falls into hollow needle container 2 that is closed by means of a cap 6 . by pressing slides 43 a , 43 b together further , until they come together in the center of hollow needle holder 41 , attachment openings 14 and passage opening 17 in the second face of hollow needle container 2 are furthermore reliably closed ( see fig1 ). in comparison with one slide 8 of hollow needle holder 1 according to the first embodiment , the two slides 43 a , 43 b are fixed in place on the hollow needle holder 41 rotated by 90 °, and project less beyond the edge of the hollow needle container 2 . a directly acting and simple unlocking mechanism 42 is achieved by means of the structure described above . this arrangement facilitates handling in practice . a fourth embodiment of a hollow needle holder 51 according to the invention is shown in fig1 . again , the same parts , relative to the previous embodiments , are provided with identical reference symbols , and will not be described in detail . the essential difference between hollow needle holder 51 and the embodiments described above lies in the arrangement and the structure of hollow needle fixing device 52 . as can be seen in fig1 , hollow needle fixing device 52 and hollow needle 5 accommodated in it are arranged offset from center axis 53 of hollow needle holder 51 in a radial direction . as a result , hollow needle 5 is located closer to one edge of hollow needle holder 51 and can be inserted into the vein of a patient more easily . as is evident from fig2 , passage opening 17 is arranged in the face of hollow needle container 2 offset relative to center axis 53 , for this purpose . attachment openings 14 , on the other hand , are distributed symmetrically about the center axis , in their longitudinal direction . on the basis of this arrangement , hollow needle 5 that projects through passage opening 17 is also offset towards the edge of hollow needle holder 51 . the offset between center axis 53 and the center of passage opening 17 is also clearly evident in fig2 . in accordance with the previous embodiments , an unlocking mechanism 54 having a slide 55 is provided , which engages at projections 15 a , 15 b of the anchoring device of hollow needle fixing device 52 by means of its corresponding shape and presses projections 15 a , 15 b together , together with flexible arms 13 a , 13 b ( see fig2 ), when it is pushed inwards . as a result , hollow needle fixing device 52 is released from hollow needle holder 51 , and hollow needle 5 falls into hollow needle container 2 , together with hollow needle fixing device 52 , as shown in fig1 . by pushing slide 55 further , passage opening 17 and attachment openings 14 are closed . the slide is guided laterally by means of projections 56 on hollow needle container 2 ( see fig2 and 21 ) and held , towards the top , by a cap 57 , which has an opening 58 having an edge reinforcement 59 at the location corresponding to passage opening 17 . cap 57 is fixed in place on hollow needle container 2 by means of setting it on , similar to cap 26 according to the second embodiment . slide 55 shown in detail in fig2 is structured in fork shape and has two recesses 60 that engage at projections 15 a , 15 b of hollow needle fixing device 52 . for this purpose , beveled sides 61 , which press projections 15 a , 15 b together , and beveled surfaces 62 are provided on the recesses , in each instance , which press projections 15 a , 15 b downward in the direction of hollow needle container 2 . as the detail representation of fig2 shows , a holder 63 that serves for the direct accommodation of hollow needle 5 is affixed , offset relative to flexible arms 13 a , 13 b having the projections , i . e . anchoring devices 15 a , 15 b , in order to be arranged in accordance with passage opening 17 in the assembled state . fig2 shows a particular embodiment of a hollow needle fixing device 64 , into which a hollow needle 65 can be engaged by means of a plug - in connector 66 . for this purpose , hollow needle fixing device 64 has projections 67 that engage in a corresponding groove 68 of hollow needle 65 . this arrangement has the advantage that hollow needle 65 can be rotated in hollow needle fixing device 64 . this feature is particularly advantageous in the case of the hollow needle fixing device that is arranged with an offset , according to the fourth embodiment , in order to align the ground point of the hollow needle in optimal manner . hollow needle fixing device 64 can , however , be configured to be compatible with all the hollow needle fixing devices of the embodiments described above . using hollow needle holder 1 , 21 , 41 , and 51 according to the invention , a particularly safe , quick , and simple disposal of the hollow needle 5 , 65 as well as simple handling are guaranteed . since hollow needle 5 , 65 falls into holder 1 , 21 , 41 , 51 , i . e . into its hollow needle container 2 , the risk of injury due to inaccurate ejection is excluded , and handling is therefore decisively improved for the personnel . although several embodiments of the present invention have been shown and described , it is to be understood that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention as defined in the appended claims .
a hollow needle holder includes a hollow needle container , a hollow needle fixing device , and an unlocking mechanism . the hollow needle container has a first face including a closable opening and a second face . the hollow needle fixing device is disposed on the second face for receipt of a hollow needle or an adapter for a hollow needle projecting through the hollow needle fixing device into the hollow needle container . the unlocking mechanism releases the hollow needle or adapter after use so that the hollow needle or adapter falls into the hollow needle container after activation of the unlocking mechanism .