Sheath flow impedance counting device

Abstract

The sheath flow impedance counting device comprises a main body, a sample needle assembly, a capture tube assembly and a counting assembly, a through groove is formed in the main body, the sample needle assembly is arranged on one side of the through groove, and the capture tube assembly is arranged on the other side of the through groove; a channel is arranged in the main body, the sample needle assembly comprises a first connecting piece and a sample needle connected with the first connecting piece, the first connecting piece is clamped with one end of the main body, and the sample needle is communicated with the channel; the capturing pipe assembly comprises a second connecting piece and a capturing pipe connected with the second connecting piece, the second connecting piece is clamped with the other end of the main body, and the capturing pipe is communicated with the channel; the counting assembly comprises a mounting part and a counting part connected with the mounting part, the mounting part is inserted into the through groove, so that the counting part is arranged in the channel, the sample needle is used for sucking to-be-detected particles into the channel, the counting part can allow the to-be-detected particles to pass through and count the to-be-detected particles, and the capturing pipe can allow the to-be-detected particles flowing through the counting part to be discharged.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a sheath flow impedance counting device. Background Art

[0002] The working principle of the sheath current impedance counting device is to arrange the particles to be measured suspended in the electrolyte through a small hole (gem hole) at a time, and install an electrode (one positive and one negative) on both sides of the small hole. The positive and negative electrodes are connected through the electrolyte before and after the small hole to form a constant current source. When the particles to be measured pass through the small hole, the overall conductivity of the electrolyte will change, thereby causing the resistance to change and generate a corresponding voltage pulse signal.

[0003] The components of the existing sheath flow impedance counting device are usually fixedly connected together by bonding and cannot be disassembled after being connected. Utility Model Content

[0004] Based on this, it is necessary to provide a sheath flow impedance counting device that is easy to disassemble.

[0005] In order to solve the above problems, the utility model provides a sheath flow impedance counting device, comprising a main body, a sample needle assembly, a capture tube assembly and a counting assembly, wherein the main body is provided with a through slot, the sample needle assembly is arranged on one side of the through slot, and the capture tube assembly is arranged on the other side of the through slot;

[0006] A channel is provided in the main body, the sample needle assembly comprises a first connecting member and a sample needle connected to the first connecting member, the first connecting member is clamped with one end of the main body, and the sample needle is communicated with the channel;

[0007] The capture tube assembly includes a second connector and a capture tube connected to the second connector, the second connector is clamped with the other end of the main body, and the capture tube is communicated with the channel;

[0008] The counting component includes a mounting part and a counting part connected to the mounting part. The mounting part is plugged into the through slot so that the counting part is arranged in the channel. The sample needle is used to suck the particles to be measured into the channel. The counting part can allow the particles to be measured to pass through and count the particles to be measured. The capture tube can allow the particles to be measured that flow through the counting part to be discharged.

[0009] In one embodiment, a first clamping member and a second clamping member are spaced apart at one end of the main body, the first connecting member comprises a first body and a first matching member and a second matching member spaced apart on the first body, the first clamping member matches with the first matching member, and the second clamping member matches with the second matching member, so that the first connecting member is clamped at one end of the main body;

[0010] A third clamping member and a fourth clamping member are spaced apart at the other end of the main body, and the second connecting member includes a second body and a third matching member and a fourth matching member spaced apart on the second body, the third clamping member matches the third matching member, and the fourth clamping member matches the fourth matching member, so that the second connecting member is clamped at the other end of the main body.

[0011] In one embodiment, the first clamping member and the second clamping member are spaced apart and arranged at one end of the main body;

[0012] The third clamping member and the fourth clamping member are arranged at an interval at the other end of the main body.

[0013] In one embodiment, the first clamping member includes an extension portion and a clamping portion, wherein the clamping portion is connected to an end of the extension portion away from the main body, wherein a groove is provided on a side of the clamping portion close to the main body;

[0014] The first matching piece includes an opening and a protrusion, the opening passes through the first body, and the opening corresponds to the extension portion, so that the extension portion passes through the opening, and the clamping portion is arranged on a side of the first body away from the main body;

[0015] The protrusion is arranged on at least one side of the first body that contacts the clamping portion, and the protrusion matches the groove, so that the clamping portion is clamped with the first connecting member.

[0016] In one embodiment, the extending portion is arranged perpendicular to the clamping portion.

[0017] In one embodiment, the sample needle is disposed in the middle region of the first body, and the capture tube is disposed in the middle region of the second body;

[0018] The opening is an arc-shaped opening, the arc-shaped opening has the center of the sample needle as its center, and the width of the opening is greater than the width of the first clamping member, and the length of the opening is greater than the length of the first clamping member.

[0019] In one embodiment, the counting assembly further comprises a card block;

[0020] The mounting member includes a mounting portion, a slot portion arranged at one end of the mounting portion, and a block portion arranged at the other end of the mounting portion, the mounting portion matches the through slot, the slot portion matches the block, and when the mounting member is inserted into the through slot, one end of the mounting portion passes through the through slot and is connected to the block, and the block portion abuts against the outside of the through slot.

[0021] In one embodiment, the card block includes an inserting portion and a blocking portion, and the inserting portion is vertically connected to the blocking portion;

[0022] The plug-in portion matches the card slot portion, and the plug-in portion is inserted into the card slot so that the card block fixes one end of the mounting portion outside the through slot.

[0023] In one embodiment, the sheath flow impedance counting device further comprises a cleaning component, wherein the cleaning component comprises a first cleaning member and a second cleaning member;

[0024] The first cleaning member and the second cleaning member are both communicated with the passage, the first cleaning member is arranged close to one end of the main body, and the second cleaning member is arranged close to the other end of the main body.

[0025] In one embodiment, the cleaning assembly further includes a third cleaning member, which is disposed close to one end of the main body and is communicated with the channel.

[0026] In the implementation of the utility model, the sheath flow impedance counting device is obtained by detachably connecting the main body, the sample needle assembly, the capture tube assembly and the counting assembly. The counting member is installed by the mounting member, and the mounting member is plugged into the through slot, which can facilitate the installation and removal of the counting assembly and the main body. The sample needle is installed by the first connecting member, and the capture tube is installed by the second connecting member. The first connecting member and the second connecting member are connected to the main body, which can facilitate the installation and removal of the sample needle assembly and the capture tube assembly.

[0027] The sample needle draws the particles to be measured into the channel, and the particles to be measured flow through the counting element and are discharged from the capture tube. The counting element can count the particles to be measured that flow through the counting element, thereby achieving the measurement effect of the sheath flow impedance counting device;

[0028] Therefore, the connection and disassembly between the various components of the sheath flow impedance technology device and the main body are convenient, which is convenient for the storage, arrangement and transportation of the sheath flow impedance counting device. The disassembled sheath flow impedance technology device has fewer dead corners when cleaning, which facilitates the cleaning of the sheath flow impedance technology device, making the cleaning of the various components of the sheath flow impedance counting device cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] in:

[0031] Figure 1 Schematic diagram of the structure of a sheath flow impedance counting device according to one embodiment.

[0032] Figure 2 For Figure 1 Exploded view of the sheath flow impedance counting device shown.

[0033] Figure 3 For Figure 1 A front view of the sheath flow impedance counting device shown.

[0034] Figure 4 For Figure 1 Rear view of the sheath flow impedance counting device shown.

[0035] Figure 5 For Figure 1 A cross-sectional view of the sheath flow impedance counting device shown.

[0036] Reference numerals:

[0037] 10-main body, 11-through groove, 12-first clamping piece, 122-extension portion, 124-clamping portion, 1242-groove, 13-second clamping piece, 14-third clamping piece, 15-fourth clamping piece;

[0038] 20 - sample needle assembly, 22 - sample needle, 24 - first connecting piece, 241 - first body, 242 - first matching piece, 2422 - protrusion, 2424 - opening, 244 - second matching piece;

[0039] 30 - capture tube assembly, 32 - capture tube, 34 - second connecting piece, 341 - second body, 342 - third matching piece, 344 - fourth matching piece;

[0040] 40-counting assembly, 41-mounting member, 411-mounting portion, 413-slot portion, 415-block portion, 42-counting member, 44-block, 442-plug-in portion, 444-blocking portion;

[0041] 50 - cleaning component, 52 - first cleaning part, 54 - second cleaning part, 56 - third cleaning part. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various parts under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] Combination Figure 1-Figure 5 The utility model discloses a sheath flow impedance counting device of one embodiment, including a main body 10, a sample needle assembly 20, a capture tube assembly 30 and a counting assembly 40. The main body 10 is provided with a through slot 11, the sample needle assembly 20 is arranged on one side of the through slot 11, and the capture tube assembly 30 is arranged on the other side of the through slot 11.

[0046] A channel is provided in the main body 10 , and the sample needle assembly 20 includes a first connecting member 24 and a sample needle 22 connected to the first connecting member 24 . The first connecting member 24 is clamped with one end of the main body 10 , and the sample needle 22 is connected to the channel.

[0047] The capture tube assembly 30 includes a second connection member 34 and a capture tube 32 connected to the second connection member 34 . The second connection member 34 is clamped with the other end of the main body 10 , and the capture tube 32 is communicated with the channel.

[0048] The counting component 40 includes a mounting member 41 and a counting member 42 connected to the mounting member 41. The mounting member 41 is plugged into the through slot 11, so that the counting member 42 is arranged in the channel. The sample needle 22 is used to suck the particles to be measured into the channel. The counting member 42 can allow the particles to be measured to pass through and count the particles to be measured. The capture tube 32 can allow the particles to be measured that flow through the counting member 42 to be discharged.

[0049] Specifically, the sample needle assembly 20 is clamped at the left end of the main body 10 through the first connecting piece 24. At this time, the sample needle 22 is inserted into the channel, and the left end of the sample needle 22 is exposed outside the main body 10. The right end of the sample needle 22 is inserted into the channel and is located on the left side of the through groove 11.

[0050] The capture tube assembly 30 is clamped on the right end of the main body 10 through the second connecting piece 34. At this time, the capture tube 32 is inserted into the channel, and the right end of the capture tube 32 is exposed outside the main body 10. The left end of the capture tube 32 is inserted into the channel and is located on the right side of the through groove 11.

[0051] The counting component 40 is inserted into the through groove 11 through the mounting piece 41, so that the counting piece 42 arranged in the central area of ​​the mounting piece 41 is located in the channel, so that the particles to be tested sucked from the left end of the sample needle 22 can be discharged from the right end of the sample needle 22, and enter from the left end of the capture tube 32 after flowing through the counting piece 42, and be discharged from the right end of the capture tube 32.

[0052] In implementing the embodiment of the utility model, the sheath flow impedance counting device is obtained by detachably connecting the main body 10, the sample needle assembly 20, the capture tube assembly 30 and the counting assembly 40. The counting member 42 is installed by the mounting member 41, and the mounting member 41 is plugged into the through groove 11, which can facilitate the installation and disassembly of the counting assembly 40 and the main body 10; the sample needle 22 is installed by the first connecting member 24, and the capture tube 32 is installed by the second connecting member 34, and the first connecting member 24 and the second connecting member 34 are clamped with the main body 10, which can facilitate the installation and disassembly of the sample needle assembly 20 and the capture tube assembly 30.

[0053] The sample needle 22 draws the particles to be measured into the channel, and the particles to be measured flow through the counting element 42 and are discharged from the capture tube 32. The counting element 42 can count the particles to be measured flowing through the counting element 42, thereby achieving the measurement effect of the sheath flow impedance counting device.

[0054] Therefore, the connection and disassembly between the various components of the sheath flow impedance technology device and the main body 10 are convenient, which is convenient for the storage, arrangement and transportation of the sheath flow impedance counting device. The disassembled sheath flow impedance technology device has fewer dead corners when being cleaned, which facilitates the cleaning of the sheath flow impedance technology device, making the cleaning of the various components of the sheath flow impedance counting device cleaner.

[0055] Preferably, a first clip 12 and a second clip 13 are spaced apart at one end of the main body 10, and the first connecting member 24 includes a first main body 241 and a first mating member 242 and a second mating member 244 spaced apart on the first main body 241, the first clip 12 matches the first mating member 242, and the second clip 13 matches the second mating member 244, so that the first connecting member 24 is snapped onto one end of the main body 10.

[0056] A third clamping member 14 and a fourth clamping member 15 are spaced apart at the other end of the main body 10. The second connecting member 34 includes a second main body 341 and a third matching member 342 and a fourth matching member 344 spaced apart on the second main body 341. The third clamping member 14 matches the third matching member 342, and the fourth clamping member 15 matches the fourth matching member 344, so that the second connecting member 34 is clamped at the other end of the main body 10.

[0057] Specifically, the first clip 12 and the second clip 13 are fixedly connected at one end of the main body 10 at a front-to-back interval. The first clip 12 is located on the front side of the left end of the main body 10, and the second clip 13 is located on the rear side of the left end of the main body 10. The first connecting member 24 is connected to the left end of the main body 10 by connecting the first clip 12 with the first matching member 242 and the second matching member 244 with the first body 241.

[0058] The third clip 14 and the fourth clip 15 are fixedly connected at the other end of the main body 10 at a front-to-back interval. The third clip 14 is located on the front side of the right end of the main body 10, and the fourth clip 15 is located on the rear side of the right end of the main body 10. The second connecting member 34 is connected to the right end of the main body 10 by connecting the third clip 14 and the third matching member 342 and the fourth clip 15 and the fourth matching member 344 through the third matching member 342 and the fourth matching member 344 arranged on the second body 341.

[0059] Preferably, the first clamping member 12 and the second clamping member 13 are arranged at one end of the main body 10 at intervals; the third clamping member 14 and the fourth clamping member 15 are arranged at the other end of the main body 10 at intervals.

[0060] Furthermore, the first clamping member 12 and the second clamping member 13 are not located on the same horizontal line.

[0061] Furthermore, the first clamping member 12 and the third clamping member 14 are diagonally arranged along one side of the main body 10 ; the second clamping member 13 and the fourth clamping member 15 are diagonally arranged along the other side of the main body 10 .

[0062] Specifically, the first clip 12 and the second clip 13 are arranged on the left end surface of the main body 10, and the first clip 12 and the second clip 13 are arranged diagonally, that is, the first clip 12 is arranged on the upper left of the main body 10, the second clip 13 is arranged on the lower left of the main body 10, the third clip 14 is arranged on the lower right of the main body 10, and the fourth clip 15 is arranged on the upper right of the main body 10.

[0063] This arrangement enables the first connector 24 to be firmly connected to the left end of the main body 10 , and the second connector 34 to be firmly connected to the right end of the main body 10 , so that both the sample needle assembly 20 and the capture tube assembly 30 can be firmly connected to the main body 10 .

[0064] Furthermore, the first clamping member 12 and the third clamping member 14 are arranged diagonally so that the overall structure of the main body 10 is more balanced and stable.

[0065] Combination Figure 2 and Figure 3 The first clamping member 12 includes an extension portion 122 and a clamping portion 124 . The clamping portion 124 is connected to an end of the extension portion 122 away from the main body 10 . A groove 1242 is provided on a side of the clamping portion 124 close to the main body 10 .

[0066] The first matching piece 242 includes an opening 2424 and a protrusion 2422 . The opening 2424 penetrates the first body 241 and corresponds to the extension portion 122 , so that the extension portion 122 penetrates the opening 2424 . The clamping portion 124 is disposed on a side of the first body 241 away from the main body 10 .

[0067] The protrusion 2422 is disposed on at least one side of the first body 241 that contacts the clamping portion 124 , and the protrusion 2422 matches the groove 1242 , so that the clamping portion 124 is clamped with the first connector 24 .

[0068] Specifically, the extension portion 122 is fixedly connected to the clamping portion 124, and a groove 1242 is provided on the right side of the clamping portion 124; when the sample needle assembly 20 is installed, the right end of the extension portion 122 is located on the right side of the first body 241, and the extension portion 122 passes through the opening 2424, so that the clamping portion 124 extends to the left side of the first body 241, and the protrusion 2422 provided on the left side of the first body 241 is clamped with the groove 1242 on the right side of the clamping portion 124. At this time, the first clamping component 12 is clamped with the first matching component 242.

[0069] There is at least one protrusion 2422 , and the groove 1242 is connected to the protrusion 2422 correspondingly.

[0070] The first clamping member 12, the second clamping member 13, the third clamping member 14 and the fourth clamping member 15 are all of the same structure; the first fitting member 242, the second fitting member 244, the third fitting member 342 and the fourth fitting member 344 are all of the same structure. Thus, the first clamping member 12 is clamped with the first fitting member 242, the second clamping member 13 is clamped with the second fitting member 244, the sample needle assembly 20 is clamped on the main body 10 through the first connecting member 24; the third clamping member 14 is clamped with the third fitting member 342, the fourth clamping member 15 is clamped with the fourth fitting member 344, and the capture tube assembly 30 is clamped on the main body 10 through the second connecting member 34.

[0071] Furthermore, the extending portion 122 and the clamping portion 124 are arranged perpendicularly.

[0072] Specifically, the extension directions of the clamping portions 124 of the first clamping member 12 and the second clamping member 13 are opposite. The clamping portion 124 of the first clamping member 12 extends upward from one end of the extension portion 122, and the clamping portion 124 of the second clamping member 13 extends downward from one end of the extension portion 122; the clamping portion 124 of the third clamping member 14 extends downward from one end of the extension portion 122, and the clamping portion 124 of the fourth clamping member 15 extends upward from one end of the extension portion 122.

[0073] Such an arrangement can make the connection between the first connecting member 24 and the first clamping member 12 and the second clamping member 13 more stable, and will not fall off naturally, and can only be disassembled under external force.

[0074] Preferably, the sample needle 22 is disposed in the middle area of ​​the first body 241 , and the capture tube 32 is disposed in the middle area of ​​the second body 341 .

[0075] Specifically, the right end of the sample needle 22 passes through the middle area of ​​the first body 241 and enters the channel, and the left end of the capture tube 32 passes through the middle area of ​​the second body 341 and enters the channel, so that the first connecting member 24 and the second connecting member 34 can be installed in the central area of ​​the main body 10.

[0076] Furthermore, the opening 2424 is an arc-shaped opening 2424 with the center of the sample needle 22 as the center, and the width of the opening 2424 is greater than the width of the first clamping component 12 , and the length of the opening 2424 is greater than the length of the first clamping component 12 .

[0077] Specifically, the front inner wall and the rear inner wall of the opening 2424 are both curved surfaces. On the first body 241, the centers of the opening 2424 corresponding to the first clamping component 12 and the opening 2424 corresponding to the second clamping component 13 coincide with each other. The protrusion 2422 corresponding to the first clamping component and the protrusion 2422 corresponding to the second clamping component 13 are both arranged with the center of the sample needle 22 as the center, and the radii of the two protrusions 2422 are the same.

[0078] Such an opening 2424 can be removed from the main body 10 by rotating the first connecting member 24 so that the groove 1242 slides out of the protrusion 2422; when installing, it is only necessary to align the sample needle 22 with the channel, make the first clamping member 12 and the second clamping member 13 pass through the corresponding openings 2424 respectively, and then rotate the first connecting member 24, so that the groove 1242 can be clamped with the corresponding protrusion 2422, and the first connecting member 24 can be clamped with the main body 10.

[0079] When the number of the protrusions 2422 is more than one, the multiple protrusions 2422 form an arc, and the center of the arc coincides with the center of the arc-shaped opening 2424 .

[0080] Likewise, the second connecting member 34 can be detached from the main body 10 by rotating the second connecting member 34 .

[0081] The sample needle assembly 20 and the capture tube assembly 30 are connected and disassembled by rotating the snap connection and canceling the rotating snap connection. The installation and disassembly are convenient and quick, and the sample needle assembly 20 and the capture tube assembly 30 after disassembly are easy to clean, as well as the interior of the main body 10. The cleaning is thorough and there are no dead corners.

[0082] Preferably, in the length direction of the opening 2424 , the width of the opening 2424 at one end close to the first clamping member 12 is smaller than the width of the opening 2424 at one end away from the first clamping member 12 .

[0083] This makes it easy for the first clamping member 12 to pass through the opening 2424 , thereby removing the sample needle assembly 20 .

[0084] Combination Figure 2 The counting component 40 also includes a block 44; the mounting member 41 includes a mounting portion 411, a slot portion 413 arranged at one end of the mounting portion 411, and a block portion 415 arranged at the other end of the mounting portion 411. The mounting portion 411 matches the through slot 11, and the slot portion 413 matches the block 44. When the mounting member 41 is inserted into the through slot 11, one end of the mounting portion 411 passes through the through slot 11 and is connected to the block 44, and the block portion 415 abuts against the outside of the through slot 11.

[0085] Furthermore, the through slot 11 is a rectangular through slot 11 .

[0086] Specifically, the slot portion 413, the mounting portion 411 and the block portion 415 are fixedly connected in sequence, the mounting member 41 is inserted into the through slot 11, the mounting portion 411 is located in the through slot 11, the slot portion 413 is located at one end of the through slot 11, and the slot portion 413 is located at the other end of the through slot 11, that is, the size of the block portion 415 is larger than the through slot 11, the block portion 415 abuts against the front side of the main body 10, the block 44 is plugged into the slot portion 413, so that the block 44 abuts against the rear side of the main body 10, and the mounting portion 411 is stably arranged in the through slot 11.

[0087] During disassembly, the stopper is pulled out from the slot portion 413, and the mounting member 41 is pulled out from the stopper portion 415, so that the sample needle assembly 20 can be disassembled from the main body 10. This facilitates the cleaning and replacement of the counting assembly 40.

[0088] Combination Figure 2 The card block 44 includes a plug-in portion 442 and a blocking portion 444, the plug-in portion 442 is vertically connected to the blocking portion 444; the plug-in portion 442 matches the card slot portion 413, and the plug-in portion 442 is inserted into the card slot so that the card block 44 fixes one end of the mounting portion 411 outside the through slot 11.

[0089] Specifically, the card slot portion 413 is a slot, and the plug-in portion 442 is inserted into the slot. When the plug-in portion 442 is inserted into the card slot portion 413 and is in place, the blocking portion 444 abuts against the outside of the slot, which facilitates the connection between the card block 44 and the card slot portion 413; by holding the blocking portion 444, the plug-in portion 442 can be pulled out of the slot, which facilitates the cancellation of the connection between the card block 44 and the card slot portion 413.

[0090] Preferably, the sheath flow impedance counting device also includes a cleaning component 50, which includes a first cleaning component 52 and a second cleaning component 54; the first cleaning component 52 and the second cleaning component 54 are both connected to the channel, the first cleaning component 52 is arranged close to one end of the main body 10, and the second cleaning component 54 is arranged close to the other end of the main body 10.

[0091] Preferably, the cleaning assembly 50 further includes a third cleaning member 56 , which is disposed close to one end of the main body 10 and is connected to the channel.

[0092] Specifically, the first cleaning member 52 and the second cleaning member 54 are both cleaning channels. The channels in the main body 10 can be cleaned by inserting the cleaning pipes into the cleaning channels and connecting them to a water source.

[0093] The first cleaning part 52 is located at the upper left of the main body 10, the second cleaning part 54 is located at the lower right of the main body 10, and the third cleaning part 56 is located at the lower left of the main body 10. Water is introduced into the main body 10 through the first cleaning part 52 and / or the third cleaning part 56 and flows out through the second cleaning part 54, so that the channel in the main body 10 can be cleaned.

[0094] When using the sheath flow impedance counting device of the present embodiment, the sample needle assembly 20, the capture tube assembly 30 and the counting assembly 40 can be detached from the main body 10, which can facilitate the cleaning and replacement of the sample needle assembly 20, the capture tube assembly 30 and the counting assembly 40, and facilitate the thorough cleaning of the channel inside the main body 10.

[0095] After replacement or cleaning, the sample needle assembly 20, the capture tube assembly 30 and the counting assembly 40 are connected quickly and conveniently, and the plug-in and rotational card connection methods will not affect the coaxiality of the sample needle assembly 20, the capture tube assembly 30 and the counting assembly 40, and will not affect the use of the sheath flow impedance counting device.

[0096] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A sheath flow impedance counting device, It is characterized in that It comprises a main body, a sample needle assembly, a capture tube assembly and a counting assembly, wherein the main body is provided with a through slot, the sample needle assembly is arranged on one side of the through slot, and the capture tube assembly is arranged on the other side of the through slot; A channel is provided in the main body, the sample needle assembly comprises a first connecting member and a sample needle connected to the first connecting member, the first connecting member is clamped with one end of the main body, and the sample needle is communicated with the channel; The capture tube assembly includes a second connector and a capture tube connected to the second connector, the second connector is clamped with the other end of the main body, and the capture tube is communicated with the channel; The counting component includes a mounting part and a counting part connected to the mounting part. The mounting part is plugged into the through slot so that the counting part is arranged in the channel. The sample needle is used to suck the particles to be measured into the channel. The counting part can allow the particles to be measured to pass through and count the particles to be measured. The capture tube can allow the particles to be measured that flow through the counting part to be discharged.

2. The sheath flow impedance counting device according to claim 1, It is characterized in that A first clamping member and a second clamping member are provided at one end of the main body, the first connecting member comprises a first body and a first matching member and a second matching member provided at intervals on the first body, the first clamping member matches with the first matching member, and the second clamping member matches with the second matching member, so that the first connecting member is clamped at one end of the main body; A third clamping member and a fourth clamping member are spaced apart at the other end of the main body, and the second connecting member includes a second body and a third matching member and a fourth matching member spaced apart on the second body, the third clamping member matches the third matching member, and the fourth clamping member matches the fourth matching member, so that the second connecting member is clamped at the other end of the main body.

3. The sheath flow impedance counting device according to claim 2, It is characterized in that The first clamping member and the second clamping member are spaced apart and arranged at one end of the main body; The third clamping member and the fourth clamping member are arranged at an interval at the other end of the main body.

4. The sheath flow impedance counting device according to claim 3, It is characterized in that The first clamping member includes an extension portion and a clamping portion, wherein the clamping portion is connected to an end of the extension portion away from the main body, wherein a groove is provided on a side of the clamping portion close to the main body; The first matching piece includes an opening and a protrusion, the opening passes through the first body, and the opening corresponds to the extension portion, so that the extension portion passes through the opening, and the clamping portion is arranged on a side of the first body away from the main body; The protrusion is arranged on at least one side of the first body that contacts the clamping portion, and the protrusion matches the groove, so that the clamping portion is clamped with the first connecting member.

5. The sheath flow impedance counting device according to claim 4, It is characterized in that The extending portion is arranged perpendicularly to the clamping portion.

6. The sheath flow impedance counting device according to claim 5, It is characterized in that The sample needle is arranged in the middle area of ​​the first body, and the capture tube is arranged in the middle area of ​​the second body; The opening is an arc-shaped opening, the arc-shaped opening has the center of the sample needle as its center, and the width of the opening is greater than the width of the first clamping member, and the length of the opening is greater than the length of the first clamping member.

7. The sheath flow impedance counting device according to any one of claims 1 to 6, It is characterized in that The counting component also includes a card block; The mounting member includes a mounting portion, a slot portion arranged at one end of the mounting portion, and a block portion arranged at the other end of the mounting portion, the mounting portion matches the through slot, the slot portion matches the block, and when the mounting member is inserted into the through slot, one end of the mounting portion passes through the through slot and is connected to the block, and the block portion abuts against the outside of the through slot.

8. The sheath flow impedance counting device according to claim 7, It is characterized in that The card block includes an inserting portion and a blocking portion, and the inserting portion is vertically connected to the blocking portion; The plug-in portion matches the card slot portion, and the plug-in portion is inserted into the card slot so that the card block fixes one end of the mounting portion outside the through slot.

9. The sheath flow impedance counting device according to claim 7, It is characterized in that The sheath flow impedance counting device further comprises a cleaning component, wherein the cleaning component comprises a first cleaning member and a second cleaning member; The first cleaning member and the second cleaning member are both communicated with the passage, the first cleaning member is arranged close to one end of the main body, and the second cleaning member is arranged close to the other end of the main body.

10. The sheath flow impedance counting device according to claim 9, It is characterized in that The cleaning component further includes a third cleaning member, which is disposed close to one end of the main body and is communicated with the channel.

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