A collection device for piercing a barrier to collect a liquid

Abstract

The application relates to the field of medical supplies, and provides a collection device for collecting liquid by piercing a barrier, which comprises a shell with a containing space and a puncture assembly, the shell comprises a contact wall and a collection port penetrating through the contact wall; the contact wall comprises a contact surface which is formed with a groove, the groove comprises a bottom wall and a surrounding wall; the bottom wall is provided with a center part protruding towards the barrier direction, and the collection port is arranged around the periphery of the center part; the collection device comprises a vacuum cavity with a pressure lower than the atmospheric pressure. The collection device for collecting liquid by piercing a barrier can be used for collecting blood or collecting other liquid; when blood needs to be collected, the contact wall is directly attached to the skin, the puncture assembly is controlled to penetrate out of the collection port, and the skin is pierced, so that the collection of the peripheral blood can be conveniently realized, and the pain during blood collection is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of medical supplies, and in particular to a collection device for piercing a barrier to collect liquid. Background Technology

[0002] Sampling is the first step in testing human health indicators. Safe and effective sampling methods can not only protect the test subjects from infection and harm during the sampling process, but also improve the accuracy of the test after sampling and detect lesions in the body as early as possible. Sampling of human body fluids (especially blood sampling) accounts for a large number of items in human testing.

[0003] Currently, there are two main methods for sampling human blood: venous blood and finger-prick blood. Venous blood collection needles are typically 2.5-4 cm long and 0.5-1.5 mm in diameter, requiring insertion into a vein. Finger-prick blood collection needles are typically 1.5-2.5 mm long, with an insertion depth of 2-3 mm. Both methods inevitably cause pain during blood collection.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] This invention provides a collection device for piercing a barrier to collect liquid, thereby solving the aforementioned technical problems.

[0006] A first aspect of the present invention provides a collection device for piercing a barrier to collect liquid, the collection device comprising a housing having a receiving space and a piercing component at least partially housed within the receiving space, the housing comprising a contact wall in contact with the barrier and a collection port opened in the contact wall; the piercing component is movable relative to the contact surface and is used to pierce the barrier through the collection port.

[0007] The contact wall includes a contact surface near the barrier, the contact surface being recessed in a direction away from the barrier to form a groove, the groove including a bottom wall opposite to the barrier and a surrounding wall extending from the bottom wall toward the barrier and connecting the contact surface and the bottom wall; the bottom wall has a central portion protruding toward the barrier and spaced apart from the surrounding wall, and the collection port is arranged around the outer periphery of the central portion and located between the surrounding wall and the central portion;

[0008] The collection device includes a vacuum chamber connected to the collection port, the vacuum chamber having a pressure lower than atmospheric pressure, the vacuum chamber being used to draw the barrier into the collection port and puncture it by the puncture component.

[0009] The collecting device for piercing a barrier to collect liquid provided by the application can be used to collect blood or other liquid. When blood needs to be collected, the contact wall is directly attached to the skin, the piercing assembly is controlled to protrude from the collecting port and pierce the skin, thus the peripheral blood collection can be conveniently performed and the pain during blood collection is greatly reduced.

[0010] The contact wall in the scheme comprises a contact surface close to the barrier (or skin), the contact surface is recessed to form a groove in the direction away from the barrier, the groove comprises a bottom wall opposite to the barrier and a surrounding wall extending from the bottom wall to the barrier and connected between the contact surface and the bottom wall; the bottom wall is provided with a center portion spaced from the surrounding wall in the direction of the barrier, the collecting port is arranged around the outer periphery of the center portion and located between the surrounding wall and the center portion; when the contact surface is attached to the barrier (or skin), the barrier (or skin) is sucked into the space between the surrounding wall and the center portion under the negative pressure suction of the vacuum cavity, and the barrier (or skin) area sucked into the collecting port is effectively reduced under the abutting action of the center portion, thus the pain during blood collection is greatly reduced.

[0011] In other preferred schemes, the piercing assembly comprises at least one microneedle, and the bottom wall is provided with a through hole corresponding to the at least one microneedle.

[0012] In other preferred schemes, the bottom wall is provided with a fluid channel communicating with the vacuum cavity, and an end of the fluid channel away from the vacuum cavity extends into the collecting port and communicates with the collecting port.

[0013] In other preferred schemes, the contact wall comprises a first contact wall and a second contact wall stacked in the movement direction of the piercing assembly, the contact surface is located on the side of the first contact wall away from the second contact wall, the surrounding wall is formed through the first contact wall, and the center portion is formed by extending from the second contact wall to the first contact wall.

[0014] In other preferred schemes, the fluid channel is formed in the second contact wall, and an end of the fluid channel away from the center portion penetrates the second contact wall and extends into the shell.

[0015] In other preferred schemes, an end surface of the center portion away from the bottom wall is coplanar with the contact surface.

[0016] In other preferred schemes, the collecting device further comprises a flexible sealing member covering the side of the contact wall away from the contact surface and connected between the piercing assembly and the contact wall.

[0017] The flexible seal includes a center fixed part fixed to the puncture assembly, an edge fixed part surrounding the center fixed part, and a flexible sealing ring connected between the center fixed part and the edge fixed part, the puncture assembly extends through the center fixed part towards the contact wall, and a normal projection of the flexible seal on the contact wall covers the entire collection port.

[0018] In other preferred schemes, the flexible sealing ring and the center fixed part move with the puncture assembly.

[0019] In other preferred schemes, the puncture assembly includes a needle seat, and at least one microneedle connected to the needle seat.

[0020] In other preferred schemes, the collection device further includes a driving component fixed to the needle seat, the driving component is used to drive the needle seat to move and drive the microneedle to pass through the collection port for collection.

[0021] In other preferred schemes, the driving component includes a driving shaft connected to the needle seat, and a driving elastic member connected to the driving shaft, the driving elastic member can push the driving shaft and drive the puncture assembly to move out of the shell to a collection position.

[0022] In other preferred schemes, the shell further includes a coupling part spaced apart from the collection port, the coupling part has a collection channel in communication with the fluid channel; the vacuum cavity is detachably connected with the shell through the coupling part.

[0023] In other preferred schemes, when the vacuum cavity is connected with the coupling part, the extension direction is parallel to the movement direction of the puncture assembly and is non-coaxial.

[0024] The application also provides, in another aspect, a blood collection device for pricking the skin to collect blood, the blood collection device includes a shell, a driving component movable relative to the shell, and a puncture assembly associated with the driving component, the shell is provided with a blood collection port corresponding to the puncture assembly;

[0025] The shell includes a contact wall in contact with the skin, and the blood collection port is provided through the contact wall; the contact wall includes a contact surface close to the skin, the contact surface is recessed to form a groove in a direction away from the skin, the groove includes a bottom wall opposite the skin and a surrounding wall extending from the bottom wall towards the skin and connected between the contact surface and the bottom wall.

[0026] The bottom wall is convexly provided with a center part spaced from the surrounding wall in the direction of the skin, and the collection port is arranged around the outer periphery of the center part and located between the surrounding wall and the center part; the collection device comprises a vacuum cavity in communication with the collection port, the vacuum cavity has a pressure lower than atmospheric pressure, and the vacuum cavity is used for sucking the skin into the collection port and being punctured by the puncture assembly.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] The collection device for puncturing a barrier to collect liquid provided by the present application can be used to collect blood or other liquids. When blood needs to be collected, the contact wall is directly attached to the skin, and then the puncture assembly is controlled to protrude from the collection port and puncture the skin, so that the collection of peripheral blood can be conveniently performed, and the pain during blood collection is greatly reduced.

[0029] The contact wall in the present application includes a contact surface close to the barrier (or skin). When the contact surface is attached to the barrier (or skin), the barrier (or skin) will be sucked into the space between the surrounding wall and the center part under the negative pressure suction of the vacuum cavity, and the barrier (or skin) sucked into the blood collection port can be effectively reduced in area under the resistance of the center part. In addition, the design of the annular blood collection port makes the puncture assembly opposite to the barrier (such as skin) sucked into the blood collection port, so that the wound formed on the barrier by the puncture assembly when collecting liquid is relatively small, thereby greatly reducing the pain during blood collection. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0031] Figure 1 A structural schematic view of a specific collection device provided by the present application;

[0032] Figure 2 A top view of a specific collection device provided by the present application;

[0033] Figure 3 A Figure 2 A-A sectional view;

[0034] Figure 4 A structural schematic view of a specific contact wall provided by the present application;

[0035] Figure 5A specific blood sampling device provided by the present application is not triggered structure diagram;

[0036] Figure 6 A specific blood sampling device provided by the present application is not triggered structure diagram.

[0037] Legend:

[0038] 100, housing; 110, contact wall; 110A, first contact wall; 110B, second contact wall; 111, through hole; 112, contact surface; 113, groove; 1131, bottom wall; 1132, surrounding wall; 1133, blood sampling cavity (collection port); 114, center part; 115, through hole; 116, fluid channel; 117, coupling part; 118, collection channel; 120, flexible sealing element; 121, center fixed part; 122, flexible sealing ring; 123, edge fixed part;

[0039] 200, puncture assembly; 210, microneedle; 220, needle seat;

[0040] 300, drive component; 310, drive shaft; 320, drive elastic element; 330, reset elastic element;

[0041] 400, start-up assembly; 410, vacuum cavity; 420, storage tube;

[0042] 500, barrier. DETAILED DESCRIPTION

[0043] In order to make the above and other features and advantages of the present application clearer, the present application will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation and are only exemplary but not limiting.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second", "third", etc. are used herein only to describe different instances, and do not imply a relative importance or a specific number of the technical features. Thus, the features defined with "first", "second", etc. can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0048] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0049] Please refer to Figures 1-6 The present application provides a collection device for piercing a barrier to collect liquid, such as for piercing the skin to collect blood, and can also be applied to various scientific research, clinical and physical health testing environments requiring peripheral blood collection.

[0050] As Figure 1As shown, the collection device in this application includes a housing 100 with a containment space, and a puncture component 200 at least partially contained within the containment space. The puncture component 200 can extend from the containment space and puncture the barrier 500 when liquid needs to be collected.

[0051] like Figures 3-5 As shown, the housing 100 includes a contact wall 110 that contacts the barrier 500, and a collection port 1133 formed in the contact wall 110; the puncture assembly 200 is movable relative to the contact wall 110 and is used to puncture the barrier 500 through the collection port 1133. In use, the contact wall 110 is first attached to the barrier 500, and then the puncture assembly 200 is controlled to move and pass through the collection port 1133 to puncture the barrier 500. For ease of description of the movement of the puncture assembly 200, the direction of movement of the puncture assembly 200 when it passes through the collection port 1133 is defined as the first direction in this scheme.

[0052] like Figures 3-6 As shown, the contact wall 110 of the collection device includes a contact surface 112 near the barrier 500. The contact surface 112 is recessed in the direction away from the barrier 500 to form a groove 113. The groove 113 includes a bottom wall 1131 opposite to the barrier 500 and a surrounding wall 1132 extending from the bottom wall 1131 toward the barrier 500 and connecting the contact surface 112 and the bottom wall 1131. The bottom wall 1131 is provided with a central portion 114 protruding toward the barrier 500 and spaced apart from the surrounding wall 1132. The collection port 1133 is arranged around the outer periphery of the central portion 114 and located between the surrounding wall 1132 and the central portion 114. The cavity between the surrounding wall 1132 and the central portion 114 is the blood collection chamber 1133.

[0053] like Figures 3-5 As shown, the collection device includes a vacuum chamber 410 connected to the collection port 1133. The vacuum chamber 410 has a pressure lower than atmospheric pressure. The vacuum chamber 410 is used to draw the barrier 500 into the collection port 1133 and puncture it by the puncture component 200. It can be understood that the barrier 500 will be drawn into the blood collection chamber 1133 between the surrounding wall 1132 and the central part 114 under the negative pressure attraction of the vacuum chamber 410, so as to facilitate the puncture component 200 to puncture it. Under the action of the central part 114, the barrier 500 can be avoided from being drawn into the groove 113 over a large area, thereby reducing the pain during blood collection.

[0054] The collection device for collecting liquid by piercing a barrier provided by the application can be used to collect blood or other liquids. When blood collection is required, the contact wall is directly attached to the skin, and then the piercing assembly 200 is controlled to protrude from the collection port 1133 and pierce the skin, thereby facilitating the collection of peripheral blood. After the contact surface 112 is attached to the barrier 500 (or skin), the barrier 500 (or skin) is sucked into the space between the surrounding wall 1132 and the center portion 114 under the negative pressure suction of the vacuum cavity 410, and the barrier 500 (or skin) sucked into the blood collection cavity 1133 is effectively reduced in area under the abutting action of the center portion 114, thereby greatly reducing the pain during blood collection.

[0055] Further, referring to Figure 3 The piercing assembly 200 includes at least one microneedle 210, and the bottom wall 1131 is provided with a through hole 111 corresponding to the at least one microneedle 210. When the contact surface 112 is attached to the barrier 500, the piercing assembly 200 is driven to pierce the shell 100, at which time the microneedle 210 can protrude into the blood collection cavity 1133 through the corresponding through hole 111 and pierce the barrier 500 at the corresponding position in the blood collection cavity 1133.

[0056] Further, referring to Figures 4-6 The bottom wall 1131 is provided with a fluid channel 116 communicating with the vacuum cavity 410, and the fluid channel 116 extends to the collection port 1133 and communicates with the collection port 1133. When the contact surface 112 is attached to the barrier 500, the vacuum cavity 410 communicates with the blood collection cavity 1133 through the fluid channel 116, at which time the barrier 500 is sucked into the blood collection cavity 1133 under the negative pressure suction of the vacuum cavity 410 and abuts against the through hole 111 as much as possible, so that the microneedle 210 protrudes from the through hole 111 to pierce the barrier 500.

[0057] The contact wall includes a first contact wall 110A and a second contact wall 110B stacked in the movement direction of the piercing assembly 200, and the contact surface 112 is located on the side of the first contact wall 110A away from the second contact wall 110B. The first contact wall 110A is formed with a surrounding wall 1132, and the bottom wall 1131 is located on the side of the second contact wall 110B close to the first contact wall 110A, and the center portion 114 extends from the second contact wall 110B to the first contact wall 110A.

[0058] Specifically, referring to Figure 4, the contact wall comprises a first contact wall 110A and a second contact wall 110B arranged in a stack, the first contact wall 110A is attached to the barrier 500, and a through hole 115 is formed in the first contact wall 110A, the inner wall of the through hole 115 is the surrounding wall 1132, one end of the through hole 115 is attached to the barrier 500, and the other end is attached to the second contact wall 110B, the center part 114 extends from the second contact wall 110B towards the through hole 115, and optionally, the outer top surface of the center part 114 is coplanar with the attachment surface of the first contact wall 110A and the barrier 500, so that the barrier 500 is sucked into the blood collection cavity 1133 between the center part 114 and the surrounding wall 1132.

[0059] In a preferred embodiment, referring to Figure 4 , the fluid channel 116 is formed in the second contact wall 110B and extends through the second contact wall 110B away from the one end of the center part 114 and into the housing 100, further in communication with the vacuum cavity 410.

[0060] The end surface of the center part 114 away from the bottom wall 1131 is coplanar with the contact surface 112, which ensures that the contact surface 112 and the end surface of the center part 114 away from the bottom wall 1131 contact the barrier 500 at the same time, so that the barrier 500 can be stably sucked into the blood collection cavity 1133, reducing the pain of blood collection.

[0061] Referring to Figures 5-6 , the collection device further comprises a flexible seal 120 covering the side of the contact wall away from the contact surface 112 and connected between the puncture assembly 200 and the contact wall; the flexible seal 120 comprises a center fixed part 121 fixed to the puncture assembly 200, an edge fixed part 123 surrounding the center fixed part 121, and a flexible sealing ring 122 connected between the center fixed part 121 and the edge fixed part 123, the puncture assembly 200 extends through the center fixed part 121 towards the contact wall, and the orthographic projection of the flexible seal 120 on the contact wall covers all the collection ports 1133.

[0062] In a specific embodiment, referring to Figures 5-6 , during the movement of the puncture assembly 200, the center fixed part 121 moves synchronously with the puncture assembly 200, and the flexible sealing ring 122 is also compressed and deformed, and moves with it, when the liquid in the barrier 500 enters the collection device through the through hole 115, the flexible seal 120 ensures the sealing between the collection port 1133 and the barrier, and the collected liquid enters the collection port 1133 and then flows into the storage device through the fluid channel 116 in time, realizing the collection of the liquid.

[0063] Further, referring to Figure 3 and Figure 5 , the puncture assembly 200 comprises a needle holder 220 and at least one microneedle 210 connected to the needle holder 220.

[0064] Optionally, the stainless steel microneedle 210 is manufactured by punching, etching and electromagnetic rheological technology in the present application, which is small in size, 1000-1500 microns in length, 500 microns in width and 10-50 microns in thickness, can greatly reduce the depth of penetration and the pain of penetration, and greatly simplify the structure of the microneedle device, facilitate its large-scale production and application.

[0065] In a preferred embodiment, referring to Figure 3 , the collection device further comprises a driving component 300 fixed with the needle seat 220, the driving component 300 is used to drive the needle seat 220 to move and drive the microneedle 210 to penetrate the collection port 1133 for collection. The driving component 300 comprises a driving shaft 310 connected with the needle seat 220, and a driving elastic member 320 connected with the driving shaft 310, the driving elastic member 320 can push the driving shaft 310 and drive the puncture assembly 200 to move to the collection position outside the shell 100.

[0066] Optionally, the needle seat 220 is cylindrical, and a plurality of mounting tooth seats are arranged around the needle seat 220, and each mounting tooth seat is correspondingly provided with a microneedle 210, one end of the driving shaft 310 is connected with the needle seat 220, and a limiting portion is further arranged in the blood collection device, the limiting portion can abut against and limit the movement of the needle seat 220 away from the one end of the driving shaft 310, when the limiting portion is disengaged from the needle seat 220, the limiting action on the needle seat 220 is released, at this time, under the action of the driving shaft 310 and the driving elastic member 320, the needle seat 220 will move in the first direction, and then the microneedle 210 will move in the first direction and penetrate the shell 100 through the through hole 115 to pierce the barrier 500.

[0067] Further, as shown in Figure 3 , the shell 100 further comprises a coupling portion 117 arranged in a spaced manner with the collection port 1133, the coupling portion 117 has a collection channel 118 in communication with the fluid channel 116; the vacuum cavity 410 is detachably connected with the shell 100 through the coupling portion 117.

[0068] Optionally, the extension direction of the vacuum cavity 410 when connected with the coupling portion 117 is parallel to and non-coaxial with the movement direction of the puncture assembly 200.

[0069] The vacuum cavity 410 can be arranged as a storage tube which can be inserted into the shell 100, when the storage tube is inserted into the shell 100, on the one hand, it can be in communication with the collection channel 118 arranged on the coupling portion 117, and then in communication with the fluid channel 116, on the other hand, the storage tube can also be arranged to drive the limiting portion to move and disengage from the needle seat 220 to release the limiting action on the needle seat 220 when it is inserted into the shell 100.

[0070] AsFigure 5 and Figure 6 As shown in the drawings, the present application provides a blood sampling device for pricking the skin to collect blood, the blood sampling device comprises a housing 100, a driving component 300 movable relative to the housing 100, and a puncture assembly 200 associated with the driving component 300, the housing 100 is provided with a blood sampling port corresponding to the puncture assembly 200; the housing 100 comprises a contact wall in contact with the skin, and the blood sampling port is provided through the contact wall; the contact wall comprises a contact surface 112 close to a barrier 500, the contact surface 112 is recessed to form a groove 113 in a direction away from the skin, the groove 113 comprises a bottom wall 1131 opposite to the skin and a surrounding wall 1132 extending from the bottom wall 1131 to the barrier 500 and connected between the contact surface 112 and the bottom wall 1131; the bottom wall 1131 is provided with a central portion 114 spaced apart from the surrounding wall 1132 in a direction towards the skin, and a collection port 1133 is provided around the outer periphery of the central portion 114 and located between the surrounding wall 1132 and the central portion 114; the collection device comprises a vacuum cavity 410 in communication with the collection port 1133, the vacuum cavity 410 has a pressure lower than atmospheric pressure, and the vacuum cavity 410 is used to suck the skin into the collection port 1133 and be pricked by the puncture assembly 200.

[0071] In a specific embodiment, as shown in Figure 5 , the blood sampling device is in a ready-to-trigger state. At this time, the contact surface 112 is tightly attached to the skin to form a sealed interface. The needle holder 220 is fixed with 2-30 solid blood sampling needles, the length of the solid blood sampling needle is 10-15 mm, and the diameter is 0.5-2.0 mm. The solid blood sampling needle pierces the central fixed portion 121, and the top of the central fixed portion 121 is tightly attached to the bottom of the needle holder 220. The needle tip of the solid blood sampling needle is located at a position 0-5 mm above the skin, in a ready-to-trigger state. The needle holder 220 is immediately above the driving shaft 310, and the driving elastic member 320 can be a spring / spring piece or other device capable of storing elastic potential energy. The blood sampling device further comprises a starting assembly 400 capable of triggering the movement of the driving shaft 310, and the vacuum cavity 410 is arranged in the starting assembly 400. When the starting assembly 400 is inserted into the housing 100, the driving elastic member 320 can drive the driving shaft 310 to move, so as to drive the needle holder 220 and the solid blood sampling needle to pierce the skin at a speed of 1-20 m / s, and under the driving of the reset elastic member 330, the needle holder 220 and the solid blood sampling needle leave the skin. Complete the incision of the skin wound, the reset elastic member 330 is connected to the driving shaft 310, and after the solid blood sampling needle is inserted into the skin, the reset spring can drive the needle holder 220 to move reversely.

[0072] Figure 6After the microneedle pierces the skin, the vacuum cavity 410 is triggered to output negative pressure to the blood collection cavity 1133 (between the surrounding wall 1132 and the center part 114) through the collection channel 118 and the fluid channel 116. The skin at the blood collection cavity 1133 has been cut by the needle body, and blood seeps from the cut. Under the action of negative pressure, the blood flows from the cut into the blood collection port 111 and flows into the collection channel 118 through the fluid channel 116 due to the pressure difference between the blood collection port and the collection channel 118, and finally enters the blood collection tube.

[0073] The flexible sealing ring is composed of soft sealing materials such as silica gel. During the piercing process of the solid needle body, the speed of the needle body is not hindered. When the subcutaneous blood is sucked by negative pressure, a closed environment is provided to ensure negative pressure and maximize the collection of the collected blood, thereby avoiding waste of blood.

[0074] Optionally, the starting assembly 400 includes a storage tube 420 and a vacuum cavity 410. When the starting assembly 400 is inserted into the shell 100, the liquid in the barrier 500 can be sucked into the blood collection device through the collection port 1133 by the negative pressure suction of the vacuum cavity 410, and then flow into the storage tube 420 through the collection channel 118, thereby realizing the collection of the liquid.

[0075] The collection device for piercing the barrier to collect liquid provided by the application can be used to collect blood or collect other liquids. When blood needs to be collected, the contact wall is directly attached to the skin, and then the piercing assembly 200 is controlled to pierce out of the collection port 1133 and pierce the skin, thereby facilitating the collection of peripheral blood and greatly reducing the pain during blood collection.

[0076] The contact wall in the present solution includes a contact surface 112 close to the barrier 500 (or the skin). When the contact surface 112 is attached to the barrier 500 (or the skin), the barrier 500 (or the skin) will be sucked into the space between the surrounding wall 1132 and the center part 114 under the action of negative pressure suction of the vacuum cavity 410, and the barrier 500 (or the skin) sucked into the blood collection cavity 1133 can be effectively reduced in area under the action of the center part 114, thereby greatly reducing the pain during blood collection.

[0077] Although the embodiments of the application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. A collection device for collecting liquid by piercing a barrier, the collection device comprising a housing having a receiving space, and a piercing assembly at least partially received in the receiving space, the housing comprising a contact wall for contacting the barrier, and a collection port formed in the contact wall; the piercing assembly being movable relative to the contact wall and configured to pierce the barrier through the collection port; characterized in that: the contact wall comprises a contact surface proximate to the barrier, the contact surface being recessed to form a recess in a direction away from the barrier, the recess comprising a bottom wall opposite to the barrier, and a surrounding wall extending from the bottom wall towards the barrier and connecting between the contact surface and the bottom wall; the bottom wall is convexly provided with a central portion spaced apart from the surrounding wall, the collection port is circumferentially provided around the central portion and located between the surrounding wall and the central portion, and an end surface of the central portion away from the bottom wall is coplanar with the contact surface; the collection device comprises a vacuum cavity in communication with the collection port, the vacuum cavity having a pressure lower than atmospheric pressure, and the vacuum cavity is configured to draw the barrier into the collection port and to be pierced by the piercing assembly; the bottom wall is formed with a fluid passage in communication with the vacuum cavity, an end of the fluid passage away from the vacuum cavity extending into the collection port and in communication with the collection port; the piercing assembly comprises at least one microneedle, and the bottom wall is formed with a through hole corresponding to the at least one microneedle; the contact wall comprises a first contact wall and a second contact wall stacked in a movement direction of the piercing assembly, the contact surface is located on a side of the first contact wall away from the second contact wall, the first contact wall is formed with the surrounding wall, the bottom wall is located on a side of the second contact wall proximate to the first contact wall, and the central portion is formed by extending from the second contact wall towards the first contact wall; the fluid passage is formed in the second contact wall and an end of the fluid passage away from the central portion extends through the second contact wall and into the housing; the collection device further comprises a flexible seal member covering a side of the contact wall away from the contact surface and connected between the piercing assembly and the contact wall; the flexible seal member comprises a central fixed portion fixed to the piercing assembly, an edge fixed portion surrounding the central fixed portion, and a flexible sealing ring connected between the central fixed portion and the edge fixed portion, the piercing assembly extends through the central fixed portion towards the contact wall, and a normal projection of the flexible seal member on the contact wall covers the entire collection port; the flexible sealing ring and the central fixed portion move with the piercing assembly; the piercing assembly comprises a needle seat, and at least one microneedle connected to the needle seat; the collection device further comprises a driving member fixed to the needle seat; the driving member comprises a driving shaft connected to the needle seat, and a driving elastic member connected to the driving shaft, the driving elastic member is capable of pushing the driving shaft and driving the piercing assembly to move out of the housing to a collection position. ​ ​ ​ ​ 2. The collection device for collecting liquid by breaking a barrier according to claim 1, characterized by, ​ 3. The collection device for collecting liquid by breaking a barrier of claim 1, wherein, ​ 4. The collection device for collecting liquid by breaking a barrier according to claim 3, characterized by, ​ 5. The collection device for collecting liquid by breaking a barrier of claim 1, wherein, ​ ​ 6. The collection device for collecting liquid by breaking a barrier of claim 5, wherein, ​ 7. The collection device for collecting liquid by breaking a barrier according to claim 6, characterized by, ​ 8. The collection device for collecting liquid by breaking a barrier of claim 7, wherein, ​ 9. The collection device for collecting liquid by breaking a barrier of claim 8, wherein, ​ 10. The collection device for collecting liquid by breaking a barrier of claim 1, wherein, The shell further comprises a coupling part spaced apart from the collection port, the coupling part having a collection channel in communication with the fluid channel; the vacuum cavity is detachably connected with the shell via the coupling part.

11. The collection device for collecting liquid by breaking a barrier of claim 10, wherein, The extension direction of the vacuum cavity when connected with the coupling part is parallel to and non-coaxial with the movement direction of the puncture assembly.

12. The collection device for collecting liquid by breaking a barrier of claim 10, wherein, The barrier is skin.

13. A blood collection device for piercing skin to collect blood, the blood collection device comprising a shell, a drive component movable relative to the shell, and a puncture assembly associated with the drive component, the shell being provided with a blood collection port corresponding to the puncture assembly, characterized in that: The shell comprises a contact wall in contact with the skin, the blood collection port being formed in the contact wall; the contact wall comprises a contact surface close to the skin, the contact surface being recessed to form a recess in a direction away from the skin, the recess comprising a bottom wall opposite the skin and a surrounding wall extending from the bottom wall towards the skin and connected between the contact surface and the bottom wall; The bottom wall is convexly provided with a central part spaced apart from the surrounding wall in the direction towards the skin, the blood collection port being arranged around the outer periphery of the central part and located between the surrounding wall and the central part, and the end surface of the central part away from the bottom wall is coplanar with the contact surface; The blood collection device comprises a vacuum cavity in communication with the blood collection port, the vacuum cavity having a pressure lower than atmospheric pressure, the vacuum cavity being used to suck the skin into the blood collection port and be pierced by the puncture assembly; The bottom wall is provided with a fluid channel in communication with the vacuum cavity, one end of the fluid channel away from the vacuum cavity extending into the blood collection port and being in communication with the blood collection port.

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