Particle collection device with clamping means for external flanges at transitions of pipe sections of a suction air stream

Abstract

Particle collection device for collecting particles from surfaces for particle analysis as part of a technical cleanliness test of test specimens, wherein the particle collection device comprises suction air guide means (01) to guide a suction air flow and to separate particles from the suction air flow via at least one particle collection unit (30), wherein the suction air guide means (01) comprise at least two adjacent line sections (02, 03, 06) which form the line of the suction air line via at least one transition (09), wherein at least one first line section (02) has an outer flange (08), and wherein a clamping means (04) is provided associated with the transition (09), which comprises a movable clamping fork (07) which can be moved into a locking state and a release state by a clamping movement, wherein in the release state the line sections (02,03) are unconnected and separable and wherein, in the secured state, the clamping fork (07) exerts force on the outer flange (08) of the first conductor section (02) and thus presses the first conductor section (02) against the second conductor section (03), wherein on an underside (10) of the clamping fork (07) facing the outer flange (08), an elongated, elastically deformable spring element (15) is arranged in end regions (13) of two fork tines (14) of the clamping fork (07).

Description

[0001] The present invention relates to a particle collection device according to the preamble of claim 1.

[0002] Particle collection devices for collecting particles from surfaces for particle analysis as part of testing the technical cleanliness of test specimens, in particular electrical assemblies and machines, are already known in the prior art. For example, such devices are known from DE 10 2017 124 265 A1, DE 10 2018 110 320 A1 and DE 10 2023 103 625 A1 of the applicant.

[0003] Unlike household vacuum cleaners or other particle collection devices, a special requirement for particle collection devices of this type is the quantitative and qualitative evaluability of the object tested and / or cleaned with the aid of a suction air stream.Unlike simple cleaning devices, which essentially aim to remove particles from a surface, with the fate of the particles after removal being secondary or irrelevant, particle collection devices of this type have the special task of not only removing and transporting the particles from the respective surfaces, but also conveying or guiding the transported particles for qualitative and quantitative analysis, ideally without any losses during transport, in suction air conveying media, up to at least one particle collection unit in which the particles are captured, separated, or otherwise separated from the suction air stream, in order to subsequently be counted and / or measured, for example, in an integrated or external analysis device.In addition to the requirement for loss-free removal and separation of particles from the component being tested / cleaned, preventing the introduction of foreign particles into the suction airflow, for example via extraneous airflows at unintentional leaks in the suction air conduit, is a particular challenge for devices of this type, because particles that do not originate from the extracted component but are nevertheless captured in the separation devices or analysis points distort the qualitative and quantitative results of the evaluation just as much as particles that do originate from the component but do not reach the separation or analysis.

[0004] Quantitative and qualitative analysis serves, among other things, to validate production processes and to implement quality assurance measures for manufacturing processes.

[0005] In the prior art, in particular in DE 10 2023 103 625 A1, a possibility is already described to reduce an unwanted loss or an unwanted discharge of particles from the suction air stream, for example through deposition in the suction air guides, especially at corresponding transitions at a transition between two pipe sections of suction air guides for guiding or directing a suction air stream.

[0006] The solution is effective and also offers relatively reliable protection against the ingress of foreign particles or air currents that do not originate from the suction air ducts of the component being tested or cleaned. However, the solution is not ideal for transitions between sections of the air ducts that need to be regularly disconnected and reconnected, for example, after inspection and / or suction from a single test specimen or component, such as to change an analysis filter. For such transitions, solutions are more advantageous that can, for example, via a push-fit connection, open or securely close the entire cross-section of the duct sections. This allows for easy access to the interior of the duct sections and, in particular, to the filters or filter media located there, with the simplest possible movement of the duct sections relative to each other.

[0007] For such transitions between cable sections, clamping or hold-down mechanisms have proven advantageous, wherein the clamping means can be switched between a locking and a release state, and in the locking state press a first cable section against the second cable section via an external flange on the cable section using a clamping fork of the clamping means. These clamping means allow simple, effective, and tamper-proof access to the interior of the cable sections, preferably to the filter or filter element arranged at the transition.

[0008] However, it has been shown that, due to manufacturing tolerances that are unavoidable, the clamping devices do not always achieve a sufficiently tight seal, particularly when transverse forces act on pipe sections that are essentially perpendicular to a longitudinal center axis of the pipe sections. Such transverse forces are regularly generated by the movement of a suction hose, especially when the suction hose is directly attached to or mounted on the pipe section secured by the clamping device. However, these transverse forces cannot be effectively limited because they are essentially caused by the use of the device and the associated movement of the suction hose.

[0009] If the lateral forces become too great, the adjacent pipe sections secured with the clamping device may tilt against each other, potentially creating a gap at the transition between the pipe sections through which an external airflow and thus foreign particles can be drawn in or sucked in.

[0010] Against this background, the object of the present invention is to overcome the problems of the prior art, in particular to propose a particle collection device in which the unwanted introduction of foreign particles and / or foreign air currents can be reliably and permanently prevented at transitions between sections of suction air ducts that can be secured and released by clamping means. This object is achieved with a particle collection device having the features of claim 1.

[0011] Advantageous embodiments of the invention are the subject of the following description, the figure description, the figures, and the dependent claims. In principle, and also to avoid unnecessary repetition, all features disclosed below in relation to the apparatus shall also be deemed disclosed and claimable in relation to the process, and vice versa.

[0012] The particle collection device according to the invention for collecting particles from surfaces for particle analysis within the framework of testing the technical cleanliness of test specimens, in particular electronic assemblies and machines, comprises suction air guides to guide a suction air stream and to separate particles from the suction air stream via at least one particle collection unit, wherein the suction air guides comprise at least two adjacent conduit sections which form the conduit of the suction air line via at least one transition.Furthermore, a first line section of the particle collection device is provided with an outer flange, and a clamping means is provided at the transition between the first and the second line section, which comprises a movable clamping fork that can be moved into a locking state and a release state by a clamping movement, wherein in the release state the first and the second line section are unconnected and separable, and wherein in the locking state the clamping fork exerts force on the outer flange of the first line section and thus presses the first line section against the second line section.

[0013] According to the invention, it is provided that on an underside of the clamping fork facing the outer flange, an elongated, preferably kidney-shaped, elastically deformable spring element is arranged in the end regions of two fork tines of the clamping fork.

[0014] By providing the spring element on the underside of the clamping fork in the end regions of the fork tines, and in particular by the elongated, preferably kidney-shaped, design of the spring element, the clamping of the clamping means, in particular the pressing of the clamping fork onto the outer flange of the first pipe section, can be realized in such a way that, even with unavoidable manufacturing tolerances of the components involved, transverse forces on the first pipe section, for example via an intake hose attached directly to the first pipe section, can be effectively and reliably prevented in the secured state of the clamping means, thus preventing tilting of the first pipe section relative to the second pipe section and thereby the possibility of the ingress of extraneous air currents and / or foreign particles, in particular largely independent of the direction of action of the transverse forces.

[0015] It has proven particularly advantageous if the spring elements in the end regions of the fork tines are not point-shaped, round, or square, but instead have an elongated extension, preferably a kidney-shaped extension. An elongated spring element within the meaning of the present invention is understood to be a spring element that has a principal longitudinal extension direction and a principal lateral extension direction, wherein the principal longitudinal extension direction is larger, preferably at least one and a half times larger, than the principal lateral extension direction.

[0016] For the present invention, the main lateral extension direction can advantageously be limited by the width of the clamping fork, in particular by the width of the clamping fork tines. Thus, in an elongated spring element according to the invention, the main longitudinal extension direction is advantageously greater than the maximum width of a tine of the clamping fork.

[0017] The elongated spring element ensures, in a particularly desirable way, that sufficient preload can be achieved in the clamping state over a wide, if not the entire, angular range of transverse forces, which is also large enough when transverse forces occur to prevent the first line section from tilting relative to the second line section and thus ensure that only the suction airflow and the particles contained therein pass through the transition between the first and second line sections.

[0018] In the particularly preferred kidney-shaped design of the elongated spring element, a relatively large contact surface of the spring element on a correspondingly ring-shaped outer flange can be achieved particularly advantageously, while at the same time a correspondingly large area on the underside of the clamping fork can be used, which also preferably has curved fork tines.

[0019] In a particularly preferred embodiment, a further elongated, preferably kidney-shaped, spring element can be arranged on the underside of the clamping fork facing the outer flange, in a branching area of ​​the fork tines. By additionally arranging a spring element in the branching area of ​​the clamping fork tines, the absorption and dissipation of lateral forces can be further improved, and in particular the angular range in which lateral forces can be reliably absorbed can be increased. Advantageously, the extension of the further spring element in the main longitudinal direction can be less than the extension in the main longitudinal direction of the spring elements in the region of the tine ends.

[0020] It can be particularly advantageous to design the additional spring element in the branching area, especially in its undeformed state, so that it protrudes less from the underside than the spring elements arranged in the end regions. This advantageously ensures that during the clamping movement, i.e., when the clamping fork is moved into the locked position or when it is pressed down, particularly when this is effected by a rotational or pivoting movement of the clamping fork, all spring elements contact the outer flange as simultaneously as possible, are pressed down, and thereby deform. This advantageously provides protection against tilting of the outer flange and thus of the pipe section.

[0021] In a further, particularly advantageous embodiment of the particle collection device, it can be provided that one of the spring elements comprises at least rubber, latex, and / or foam. The aforementioned materials are particularly well suited to achieving a preload of the first conduit section – via the outer flange – against the second conduit section when the clamping means are engaged, and thus to achieve the particularly advantageous protection of the transition against the ingress of external air currents and / or foreign particles.

[0022] In a further, particularly advantageous embodiment of the particle collection device, the spring element can be partially received in a recess in the underside of the clamping fork. The recess can, for example, be designed as an elongated, preferably kidney-shaped, blind hole. Partially receiving the spring element or elements in one or more recesses advantageously simplifies the assembly of the clamping device, since the spring elements can then be inserted precisely into the recess and, if necessary, held there solely by self-locking or an interference fit.Furthermore, the partial insertion of the spring elements into the recess allows for elastic deformation in the clamping direction over the entire height of the elongated spring element, thus creating an elastic restoring force on the outer flange, while at the same time the recess in the clamping fork has a stabilizing effect on the received part of the spring element, especially perpendicular to the thickness direction or clamping direction, and thus avoids or minimizes unwanted elastic effects perpendicular to the clamping direction.

[0023] In a further, particularly desirable embodiment of the particle collection device, the clamping fork may include an additional horn, which is positioned above a plane of the clamping fork's tines and which, when the clamping means, particularly the clamping fork, is locked, rests against an outer surface of the first pipe section. The horn, positioned higher than the tines, provides particularly desirable additional support for the first pipe section. This support, both due to its higher position relative to the tines and its contact with the outer surface of the first pipe section, effectively prevents the first pipe section from tilting relative to the second pipe section, caused by lateral forces, such as those exerted by a suction hose.

[0024] A particular advantage is that the additional horn absorbs or dissipates lateral forces in an angular range that, due to the one-sided opening of the clamping fork, can only be absorbed with difficulty or to a limited extent by the spring elements according to the invention. The additional horn can advantageously be formed as a single piece or monolithically as part of the clamping fork.

[0025] A lever mechanism for the clamping means is particularly preferred, especially a lever mechanism cooperating with the clamping fork, designed such that when the clamping means are moved into the release state, the horn of the clamping fork is also moved away from the first conductor section in order to enable simple and safe removal of the first conductor section without obstruction by the horn.

[0026] In a further, particularly preferred embodiment of the particle collection device, the clamping fork can be configured to interact with a clamping lever via a lever mechanism, preferably a toggle lever mechanism, whereby the locking or release state of the clamping means can be established depending on the position of the clamping lever. Particularly preferably, the clamping lever, clamping fork, and lever mechanism that connects the clamping lever and the clamping fork are part of the clamping means, which in turn press the first line section against the second line section when the clamping means are in the locked state.The advantageous lever mechanism ensures that, with relatively small forces, especially when a suitably dimensioned clamping lever is used, the clamping fork together with the spring elements is pressed against the outer flange of the first pipe section, thereby generating sufficient preload or clamping effect, so that tilting can be effectively prevented even under relatively large transverse forces acting on the first pipe section.

[0027] In a further, particularly desirable embodiment, a first clamping means and a second clamping means may be provided, wherein a first and a second conductor section can be secured with the first clamping means, and a second and a third conductor section can be secured with the second clamping means. This advantageously allows a total of two conductor sections, namely the first and the second conductor section, to be quickly and easily removed and reconnected, particularly by a plugging motion, so that easy access to the interior of the conductor sections or the connection to the conductor section is possible at two, preferably adjacent, transitions. The clamping means may preferably be arranged one above the other – along the vertical axis. Even more preferably, the clamping means may be fixed with a common holder.This ensures a fixed and defined relative arrangement of the clamping devices to each other and to the cable sections.

[0028] Preferably, the first and second clamping means are designed or configured such that the first cable section can also be secured to the third cable section via the second clamping means, while the second cable section is omitted. It is particularly advantageous to provide that the two outer flanges of the first and second cable sections, as well as the optionally interlocking contours or end profiles of the cable sections, are compatible with each other. This allows, in a particularly simple and advantageous way, for cable sections such as the first cable section to be used while the second cable section is not, while at least one of the two clamping means still achieves a sufficiently secure fixation of the cable sections against each other and against each other, protected against the influence of transverse forces.

[0029] This can be particularly advantageous if a filter can be arranged or positioned between the first and second pipe sections and / or between the second and third pipe sections to separate or filter particles from the suction airflow at the pipe section transitions. This allows for flexible operation with a single filter between the first and second pipe sections, between the second and third pipe sections, or between the first and third pipe sections, or alternatively with two filters, one between the first and second pipe sections and the other between the second and third pipe sections. Similarly, the particle collection device can then be easily and quickly reconfigured to change or adapt the operation or operating mode.

[0030] In this context, it can be particularly advantageous to provide a first, preferably upper, clamping element with a clamping fork that has an additional horn, while a second, preferably lower, clamping element has a clamping fork without an additional horn. It has been found that the additional horn described above is particularly advantageous the higher the section of cable to be secured is positioned relative to a fixed or non-tilting cable section. Therefore, it can be particularly useful and advantageous to provide only a first, upper clamping element with an additional horn on the side of the clamping fork.

[0031] In a further, particularly advantageous embodiment, a removable filter can be arranged between the first and second cable sections. This allows for particularly simple and reliable access to the filter by opening the clamping means and removing, for example, the first cable section, so that it can be easily removed and replaced.

[0032] In a further, particularly advantageous embodiment, a removable second filter, preferably with a smaller mesh size than the first filter, can be arranged between the second and third pipe sections. This allows for cascaded filtration of two different particle size ranges, with the preferably second clamping means providing particularly easy access to both filters. Furthermore, when the clamping means are locked, the ingress of extraneous air currents and / or foreign particles can be effectively prevented by tilting the respective pipe sections.

[0033] The present invention is explained below with reference to exemplary, purely schematic drawings of embodiments.

[0034] It shows: Fig. 1: a representation of a generic particle device; Fig. 2: a perspective view of a first embodiment of a clamping fork according to the invention; Fig. 3: a perspective view of a second embodiment of a clamping fork according to the invention; Fig. 4: a section of a particle collection device according to the invention, including two clamping means according to the invention; Fig. 5: a representation of the section of the particle collection device according to Fig. 4 with the first and second line sections hidden; Fig. 6: a sectional view through an assembly of a particle collection device according to the invention with two clamping means; Fig. 7: an exploded view of parts of two clamping devices according to the invention.

[0035] The Fig. Figure 1 shows a generic particle collection device 26 not included in the invention, but which illustrates its components and operation. Starting from a vacuum source (not shown), a suction airflow can be generated, which is guided via suction air guide 01 from a handpiece 27, through a suction hose 28, a cyclone unit 11, a connecting hose 29 to a particle collection unit 30, and from the particle collection unit 30 to an outlet 31. The transitions between the aforementioned parts of the suction air guide 01 can, for example, be secured by means of safety devices 12, which are disclosed and described in DE 10 2023 103 625 A1.

[0036] In the area of ​​the particle collection unit 30, two clamping means 04 are provided, which are mounted on a lateral support 05, and which secure a first line section 02 to a second line section 03 and the second line section 03 to a third line section 06, in which the clamping forks 07 encompassed by the clamping means 04 press onto an outer flange 08 of the first line section 02 and the second line section 03.

[0037] In the presentation of the state of the art according to the Fig. Transverse forces Q, perpendicular to a longitudinal center axis L, are only to be expected to a very small extent on the first line section 02 and / or the second line section 03, since the connecting hose 29 is static and therefore no significant transverse forces Q are generated via the connecting hose 29. Therefore, the clamping means 04 are sufficient to secure the line sections 02, 03, 06 in almost all situations. However, it is also possible not to connect the cyclone unit 11 first with the suction hose 28, but rather to connect the end of the suction hose 28 used by the handpiece 27 directly – and thus instead of the connecting hose 29 – to the particle collection unit 30 and the first line section 02. This is also made possible by the standardized securing means 12.

[0038] If the suction hose 28, in particular via the handpiece 27, is then moved over a test specimen or a component, corresponding lateral forces Q can occur in the area of ​​the first line section 02 and the second line section 03. The forces Q in the Fig. The clamping device 04 shown in Figure 1, with the clamping fork 07, is only able to keep the transitions 09 between the first and second pipe sections, as well as between the second pipe section 03 and the third pipe section 06, closed within a limited range of transverse forces. Therefore, above a certain transverse force Q, it must be expected that the transitions 09 will become leaky, and thus there is a possibility that particles will escape from the suction airflow or that foreign particles will be drawn in or sucked in via external airflows. This applies particularly when considering the unavoidable tolerances of the components, such as the clamping fork 07 and pipe sections 02, 03, and 06.

[0039] To prevent tilting of the first conductor section 02 and / or the second conductor section 03 induced by the transverse force, the present invention proposes clamping means, which are described in more detail below: A first clamping fork 07 for use in a particle collection device 01 according to the invention is shown in the Fig. Figure 2 shows that on the underside 10 of the clamping fork 07 facing the outer flange 08, an elongated, preferably kidney-shaped, elastically deformable spring element 15 is arranged in the end regions 13 of the fork tines 14. The elongated, particularly preferably kidney-shaped, design of the spring element 15 effectively prevents or counteracts tilting of the clamped or secured section of the line.

[0040] It can also be particularly advantageous to provide a further, also elongated, and preferably kidney-shaped, spring element 17 in a branching area 16 of the fork tines 14 or the clamping fork 07. The additional spring element 17 allows the angular range in which lateral forces Q can be particularly advantageously dissipated and the tilting of the secured section of the line to be extended particularly effectively.

[0041] The clamping fork 07 also shows connecting means 18 for attaching a lever mechanism (not shown) which connects the clamping fork 07 to a [unclear] in the Fig. 2 clamping levers, which are also not shown.

[0042] In an alternative embodiment of the clamping fork 07 according to the Fig. Figure 3 shows the further spring element 17, as well as one of the spring elements 15, removed or not shown for better illustration, so that in the Fig. As can be seen in Figure 3, the further spring element 17, as well as the spring elements 15, are partially received in corresponding recesses 19 on the underside 10 of the clamping fork 07. Preferably, the recesses 19 may have the elongated, particularly preferably kidney-shaped, contour of the spring elements 15, 17.

[0043] It is also evident that the spring element 17 in the branching area 16 protrudes slightly less beyond the underside 10 in the undeformed or relaxed state than the spring elements 15 in the end area 13. As can be seen from the lever mechanism of the Fig. As can be seen in Figure 6, this different elevation or extension over the underside 10 ensures that during the securing movement - and the associated rotation or pivoting of the clamping fork 07 - as many spring elements 15, 17 as possible come into contact with the outer flange together or simultaneously, so that additional or earlier tilt protection is guaranteed.

[0044] Furthermore, in the Fig. Figure 3 shows an embodiment of the clamping fork 07 in which an additional horn 20 is provided integrally with the clamping fork 07, in particular monolithically with the clamping fork 07, which is arranged above a plane of the fork tines 14 of the clamping fork 07 and which bears against an outer surface of the first conductor section in the secured state of the clamping means 04. The corresponding effects of the clamping fork 07 of the Fig. 2 and Fig. The following three examples are given, but are by no means limited, based on the Fig. 4 to 7 explained.

[0045] The Fig. Figure 4 shows a section of a particle collection device 01 according to the invention, in which it can be seen that two clamping means 04 are provided. The section of the Fig. Figure 4 shows a part of the particle collection device 01 in a preparation state, in which the upper end of the first line section 02 is closed with a safety plug 21 to prevent the unintentional ingress of particles. Before operation, the safety plug 21 is removed and a suction hose 28 or a connecting hose 29 is connected instead via a locking device 12.

[0046] The securing device 04, which presses the first line section 02, has the design according to Fig. 3. The corresponding horn 20 is clearly visible and accordingly rests on the outer surface 22 of the first line section 02. Through the horn 20, as well as the representation of the Fig. 4 elastic spring elements 15 and 17, which are only partially recognizable, provide effective protection against tilting of the first line section relative to the second line section 03 under transverse forces Q.

[0047] Likewise, the clamping device 04 secures the second conductor section 03 against the third conductor section 06, again by means of the only vaguely discernible elastic spring elements 15, 17. Both clamping devices 04 are shown in the illustration of the Fig. 4 shown in the secured state.

[0048] The locking state can be released via the clamping levers 23, which are operatively connected to the clamping forks 07 via a lever mechanism not shown.

[0049] The one in Fig. The four not particularly easily recognizable spring elements 15, 17 are shown in the illustration of the Fig. 5 again clearly shown, in contrast to the presentation of the Fig. 4 essentially the safety plug 21, the first line section 02 and the second line section 03 are hidden or not shown.

[0050] In the Fig. Figure 6 shows how the lever mechanism 24 connects the clamping fork 07 to the clamping lever 23 for the two clamping elements 04, enabling the locking and unlocking of the clamping state. Also shown is a side plate 25 of the lateral support 05, which serves to mount the clamping elements, in particular the lever mechanism 24, the clamping lever 23, and the clamping forks 07. The common support 05 of the two clamping elements 04 ensures that they form a fixed and precisely defined relative arrangement, which can be used to flexibly connect the first conductor section 02 and / or the second conductor section 03 with the third conductor section 06.

[0051] In the Fig.Figure 7 shows another part of the clamping means 04 in an exploded view. In particular, the exploded view shows the spring elements 15, 17, the clamping forks 07 and the clamping levers 23. Reference symbol list 01 Suction air lubricant 02 first line section 03 second line section 04 Clamping devices 05 Bracket 06 third line section 07 Clamping fork 08 Outer flange 09 Transition 10 Subpage 11 cyclone units 12 safety devices 13 End area 14 fork tines 15 spring element 16 Branching area 17 Spring element 18 Fasteners 19 exceptions 20 Horn 21 safety plugs 22 Exterior surface 23 clamping levers 24 lever mechanism 25 Side cheek 26 Particle collection device 27 Handpiece 28 Suction hose 29 Connecting hose 30 particle collection unit Q Shear forces L Longitudinal axis QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2017 124 265 A1

[0002] DE 10 2018 110 320 A1

[0002] DE 10 2023 103 625 A1 [0002, 0005, 0035]

Claims

[1] Particle collection device for collecting particles from surfaces for particle analysis as part of a test of the technical cleanliness of test specimens, in particular electronic assemblies and machines, wherein the particle collection device comprises suction air guide means (01) for guiding a suction air flow and separating particles from the suction air flow via at least one particle collection unit (30), wherein the suction air guide means (01) comprise at least two adjacent line sections (02, 03, 06) which form the suction air line via at least one transition (09), wherein at least one first line section (02) has an outer flange (08), and wherein a clamping means (04) is provided associated with the transition (09), which comprises a movable clamping fork (07) which can be moved into a locking state and a release state by a clamping movement, wherein in the release state the line sections (02,03) are unconnected and separable and wherein, in the secured state, the clamping fork (07) exerts force on the outer flange (08) of the first conductor section (02) and thus presses the first conductor section (02) against the second conductor section (03), characterized by , that on an underside (10) of the clamping fork (07) facing the outer flange (08) an elongated, preferably kidney-shaped, elastically deformable spring element (15) is arranged in end regions (13) of two fork tines (14) of the clamping fork (07). [2] Particle collection device according to claim 1, characterized by , that on an underside (10) of the clamping fork (07) facing the outer flange (08) a further, elongated, preferably kidney-shaped, spring element (17) is arranged in a branching area (16) of the fork tines (14). [3] Particle collection device according to claim 1 or 2, characterized by, that the further spring element (17) in the branching area (16), especially in an undeformed state, protrudes less over the underside (10) than the spring elements (15) arranged in the end areas (13). [4] Particle collection device according to any one of claims 1 to 3, characterized by , that a material of the spring elements (15, 17) has at least rubber, rubber and / or foam. [5] Particle collection device according to one of the preceding claims, characterized by , that the spring element (15, 17) is partially received in a recess (19) of the underside of the clamping fork (07). [6] Particle collection device according to one of the preceding claims, characterized by , that the clamping fork (07) includes an additional horn (20) which is arranged above a plane of fork tines (14) of the clamping fork (07) and which, in the secured state, rests against an outer surface (22) of the first conductor section (02). [7] Particle collection device according to one of the preceding claims, characterized by , that the clamping fork (07) is designed to interact with a clamping lever (23) via a lever mechanism (24), preferably a toggle lever mechanism, wherein the locking state or the release state can be established depending on the position of the clamping lever (23). [8] Particle collection device according to one of the preceding claims, characterized by a first clamping device (04) and a second clamping device (04), wherein a first conductor section (02) and a second conductor section (03) can be secured with the first clamping device (04) and the second conductor section (03) and a third conductor section (06) can be secured with the second clamping device (04). [9] Particle collection device according to any one of the preceding claims, characterized by , a removable filter is arranged between the first line section (02) and the second line section (03). [10] Particle collection device according to claim 8 or 9, wherein a removable second filter, preferably with a smaller mesh size than the first filter, is arranged between the second line section (03) and the third line section (06).

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