Sampling and sampling mechanism and blood type analyzer

Abstract

The invention relates to the technical field of medical instruments, and discloses a sample adding and sampling mechanism and a blood type analyzer, and the sample adding and sampling mechanism comprises a base, a driving part, a movable assembly, a sample adding assembly and a sensing assembly. The driving part is mounted on the base; the movable assembly comprises a movable part which is connected to the base in a sliding mode. The sample adding assembly comprises a sample adding needle and a connecting piece, the sample adding needle is installed on the connecting piece, the connecting piece is connected to the movable piece in a sliding mode, and the driving component is connected with the movable piece and can drive the movable piece to move so that the sample adding needle can move to a preset position in the sample adding and taking direction to add and take liquid substances; the sensing assembly comprises a sensing unit and a triggering unit, one of the sensing unit and the triggering unit is connected to the movable piece, and the other one is connected to the connecting piece. According to the sample adding and sampling mechanism, the pressure borne by the sample adding needle can be reduced, the risk that the sample adding needle is bent and damaged is reduced, and the blood type analyzer with the sample adding and sampling mechanism also has the advantages.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and more particularly to a sampling mechanism and a blood typing analyzer. Background Technology

[0002] Currently, clinical diagnostic information is often obtained by analyzing the chemical composition or reactions of samples such as blood, excrement, and secretions collected from the human body. When processing liquid substances (such as samples, reagents, and diluents), a sampling needle is usually required to perform aspiration and dispensing operations. If the sampling mechanism collides with non-standard objects or other unexpected situations occur during operation, there is a risk of damage to the sampling needle, especially when using permanent sampling needles, which significantly increases maintenance costs.

[0003] In related technologies, a collision detection device is added to the sampling mechanism so that the detection device can be triggered when the sampling needle collides, thereby stopping the movement of the sampling needle. However, existing detection devices still require the sampling needle to withstand pressure from multiple components before triggering, and this pressure often gradually increases before the detection device is triggered. Therefore, it is still difficult to effectively avoid the risk of the sampling needle bending or being damaged. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a sampling mechanism that can reduce the pressure on the sampling needle and reduce the risk of the sampling needle bending and being damaged.

[0005] The present invention also proposes a blood typing analyzer having the above-mentioned sampling mechanism.

[0006] According to a first aspect of the present invention, the sampling mechanism includes a base, a driving component, a moving component, a sampling component, and a sensing component.

[0007] A driving component is mounted on the base; a movable component includes a movable part slidably connected to the base; a sample dispensing component includes a sample dispensing needle and a connector, the sample dispensing needle is mounted on the connector, the connector is slidably connected to the movable part, the driving component is connected to the movable part and can drive the movable part to move, so that the sample dispensing needle can move along the sampling direction to a preset position to dispense liquid substances, the sliding direction of the connector and the sliding direction of the movable part are both parallel to the sampling direction; a sensing component includes a sensing unit and a triggering unit, one of the sensing unit and the triggering unit is connected to the movable part, and the other is connected to the connector; The sampling mechanism has a first working state and a second working state. In the first working state, the sensing unit and the triggering unit are spaced apart along the sampling direction, the connecting member and the movable member remain relatively stationary, and can move together along the sampling direction. In the second working state, the movement of the sampling needle along the sampling direction is blocked, the connecting member moves relative to the movable member, causing the triggering unit to trigger the sensing unit, so that the driving component stops driving the sampling assembly to move along the sampling direction.

[0008] The sampling mechanism according to embodiments of the present invention has at least the following beneficial effects: by connecting the connecting member to the movable member, the force from the movable member acting on the connecting member is applied to the sampling assembly. When the movement of the sampling needle is obstructed, the sliding connection between the movable member and the connecting member transforms the contradiction between the driving force of the driving component and the obstruction of the sampling needle into a relative displacement between the connecting member and the movable member. The connecting member drives the sampling needle to move, causing the sensing unit and the triggering unit to move towards each other to stop the operation of the sampling mechanism. This avoids the situation where the pressure is applied to the sampling needle before the sensing unit is triggered, thereby reducing the pressure on the sampling needle and lowering the risk of bending and damage to the sampling needle.

[0009] According to some embodiments of the present invention, the movable component further includes a fixing plate connected to the movable member and capable of moving along the sampling direction with the movable member, the fixing plate having a bottom wall; In the first working state, the bottom of the connector abuts against the bottom wall; in the second working state, the connector moves away from the bottom wall and separates from the bottom wall.

[0010] According to some embodiments of the present invention, the sampling assembly further includes a first elastic member, the first elastic member being connected to the movable member and the connecting member at both ends along the sampling direction, and applying an elastic force to the connecting member to make the connecting member tend to move away from the movable member.

[0011] According to some embodiments of the present invention, the fixed plate defines a movable cavity inside, the cavity wall at the bottom of the movable cavity forms the bottom wall, a portion of the movable member is disposed in the movable cavity, the connecting member includes a sliding part and a connecting part, the sliding part is slidably connected to the movable member and disposed in the movable cavity, and the connecting part is connected to the sample dispensing needle and the sliding part; In the first working state, the bottom of the sliding part abuts against the bottom wall; in the second working state, the sliding part drives the connecting part to slide relative to the movable part.

[0012] According to some embodiments of the present invention, the cavity wall at the top of the active cavity forms a top wall, the sensing unit and the triggering unit have a first distance along the sampling direction, the top end of the sliding part and the top wall have a second distance along the sampling direction, the second distance is not less than the first distance, and in the second working state, when the triggering unit triggers the sensing unit, the top end of the sliding part abuts against the top wall.

[0013] According to some embodiments of the present invention, the sample feeding assembly further includes a first elastic element and a positioning pin. The two ends of the first elastic element along the sampling direction are respectively connected to the fixed plate and the connecting member. The upper end of the first elastic element abuts against the top wall, and the lower end of the first elastic element abuts against the sliding part. The positioning pin is disposed in the movable cavity and connected to the top wall. The positioning pin passes through the interior of the first elastic element.

[0014] According to some embodiments of the present invention, the sampling mechanism further includes a control module and an alarm module, wherein the sensing component, the driving component and the alarm module are all communicatively connected to the control module; In the second working state, the control module, based on the trigger information of the sensing component, causes the driving component to stop operating to pause the sliding of the moving part, and simultaneously controls the alarm module to sound an alarm.

[0015] According to some embodiments of the present invention, the movable component further includes a second elastic member, the upper end of which is connected to the base and the lower end of which is connected to the fixing plate. The second elastic member is used to apply an elastic force to the fixing plate to make the fixing plate tend to move closer to the base.

[0016] According to some embodiments of the present invention, the sampling needle has a first extreme position in the opposite direction of the sampling direction, and the sampling mechanism further includes a shock absorber connected to the base. When the sampling needle moves to the first extreme position, the connecting member abuts against the shock absorber. And / or, along the sampling direction, the sampling needle has a second limit position, and the movable component further includes a first limiting member and a second limiting member, the first limiting member being connected to the movable component, and the second limiting member being connected to the base. When the sampling needle moves to the second limit position, the first limiting member abuts against the second limiting member to restrict the movement of the movable component.

[0017] A blood typing analyzer according to a second aspect of the present invention includes the sampling mechanism described in any of the above embodiments. The sampling needle is used for sampling.

[0018] The blood typing analyzer according to the embodiments of the present invention has at least the following beneficial effects: the operation of the blood typing analyzer can be paused to process the sampling needle when the sampling needle collides with it through the cooperation of the sensing unit and the triggering unit; and the force of the sampling component is distributed on the connecting member, which can reduce the pressure on the sampling needle when the sampling needle collides with an external object and reduce the risk of bending and damage to the sampling needle.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the sampling mechanism in an embodiment of the present invention; Figure 2 This is an exploded view of the sampling mechanism in an embodiment of the present invention; Figure 3 This is an exploded view of the sampling mechanism in an embodiment of the present invention; Figure 4 This is a schematic diagram of the sample addition component in an embodiment of the present invention; Figure 5 This is an exploded view of the sample addition component in an embodiment of the present invention; Figure 6 This is a schematic diagram of the sampling mechanism in its first working state in an embodiment of the present invention; Figure 7 This is a schematic diagram of the sampling mechanism in its second working state in an embodiment of the present invention; Figure 8 This is a schematic diagram of the sampling mechanism changing from the first working state to the second working state in an embodiment of the present invention.

[0021] Figure label: Add sampling unit 100; Base 110; Drive component 120; Movable component 130; movable part 131; fixed plate 132; movable cavity 1321; top wall 1322; bottom wall 1323; fixed groove 1324; second elastic element 133; first limiting element 134; second limiting element 135; Sample dispensing assembly 140; sample dispensing needle 141; connector 142; sliding part 1421; connecting part 1422; slider 1423; abutting part 1424; first elastic element 143; positioning pin 144; Sensing component 150; triggering unit 151; sensing unit 152; Shock absorber 160. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The sampling mechanism of the first aspect embodiment and the blood typing analyzer of the second aspect embodiment of the present invention will now be described with reference to the accompanying drawings.

[0028] A first aspect of the present invention provides a sampling mechanism 100, see reference. Figures 1 to 5As shown, the sampling mechanism 100 includes a base 110, a drive component 120, a movable component 130, a sampling component 140, and a sensing component 150. The base 110 serves as the mounting carrier for the sampling mechanism 100 and is used to assemble and fix other components. The drive component 120 is mounted on the base 110. The movable component 130 includes a movable element 131, which is connected to the drive component 120 and the base 110. The movable element 131 is driven by the drive component 120 to slide reciprocally relative to the base 110 along the sampling direction and in the opposite direction. In this embodiment, the drive component 120 comprises a rotary motor, a gear, and a rack. The output shaft of the rotary motor is connected to the gear, and the gear meshes with the rack. When the rotary motor rotates, it drives the rack to move vertically via the gear. The movable element 131 is connected to the rack, and the rotation of the rotary motor is converted into the sliding of the movable element 131 through the cooperation of the rotary motor, gear, and rack. In other embodiments, the drive component 120 may also be a linear motor, and the sliding of the movable component 131 is achieved through the telescopic movement of the drive component 120.

[0029] The sample application assembly 140 includes a sample application needle 141 and a connector 142. The sample application needle 141 is mounted on the connector 142, and the connector 142 is slidably connected to a movable member 131. When the movable member 131 is driven by the driving component 120 to slide, the movable member 131 will drive the connector 142 and the sample application needle 141 to move along the sampling direction, so that the sample application needle 141 moves to a preset position to apply liquid substances (such as samples, reaction reagents, diluents, etc.). The sliding direction of the connector 142, the sliding direction of the movable member 131, and the sampling direction are parallel to each other.

[0030] The sensing assembly 150 includes a sensing unit 152 and a triggering unit 151. The sensing unit 152 and triggering unit 151 are connected to different components; one is connected to the movable assembly 130, and the other is connected to the connector 142. The sensing unit 152 and triggering unit 151 are spaced apart along the sampling direction. They are used to detect whether the sampling assembly 140 encounters an obstacle to determine whether to pause the operation of the driving component 120. When the sensing unit 152 is triggered by the triggering unit 151, the driving component 120 stops working to pause the sliding of the movable component 131 along the sampling direction, thereby preventing damage to the sampling needle 141. In one embodiment, the sensing unit 152 and the triggering unit 151 are photoelectric components. The sensing unit 152 can be a detection switch with a groove, and the triggering unit 151 can be a photoelectric baffle. When the triggering unit 151 moves to the sensing area of ​​the sensing unit 152, it will trigger the sensing unit 152, thereby feeding back to the control module to shut down the operation of the driving component 120 and stop the continued sliding of the movable part 131.

[0031] Specifically, taking a top-to-bottom sampling direction as an example, in this embodiment, the sensing unit 152 is disposed on the connector 142, and the trigger unit 151 is disposed on the movable component 130. When the sampling mechanism 100 is operating, the trigger unit 151 is located above the sensing unit 152, and the sensing unit 152 generates a detection beam. See also... Figure 6 As shown, in the first working state, the movable part 131 and the connecting part 142 remain relatively stationary, and the trigger unit 151 and the sensing unit 152 also maintain a stable distance. At this time, the sampling needle 141 does not collide with external obstacles. The movable part 131 will drive the connecting part 142 to slide until the sampling needle 141 moves to the preset position to perform normal sampling operations. (See reference...) Figure 7 As shown, in the second working state, the sampling needle 141 collides with an external obstacle, obstructing its movement, and the connector 142 and the sampling needle 141 stop moving. The driving component 120 drives the movable component 131 to continuously slide along the sampling direction, causing relative sliding between the connector 142 and the movable component 131, so that the sensing unit 152 and the triggering unit 151 move closer to each other. When the triggering unit 151 triggers the sensing unit 152, the driving component 120 stops operating to pause the sliding of the movable component 131.

[0032] In another embodiment, the sensing unit 152 and the triggering unit 151 may also be non-contact detection components, without limitation. For example, the sensing unit 152 may be a ranging sensor, including but not limited to laser ranging sensors or infrared ranging sensors; correspondingly, the triggering unit 151 may be a marker or the like disposed on the movable component 130. By detecting the change in distance between the reflective surface of the marker and the sensor in real time, a collision is determined to have occurred when the change exceeds a preset threshold.

[0033] Taking the sampling mechanism applied to a blood typing analyzer as an example, when the sampling needle 141 performs normal sampling operations, it moves along the sampling direction to a preset position to add the aspirated sample or reagent into the detection hole of the blood typing card. If the sampling needle 141 is not aligned with the detection hole at this time, refer to... Figure 7As shown, when the sampling needle 141 collides with an external object, its movement along the sampling direction is obstructed, and it will not continue to slide with the movable part 131. Since the sampling needle 141 is mounted on the connector 142, and the connector 142 and the movable part 131 are slidably connected, the connector 142 and the sampling needle 141 are stationary relative to the collided external object. Therefore, when the movable part 131 continues to be driven by the driving component 120, the movable part 131 will drive the trigger unit 151 to continue moving downward, and the connector 142 and the sampling needle 141 will move upward relative to the movable part 131. The distance between the sensing unit 152 and the trigger unit 151 will gradually decrease. When the trigger unit 151 moves to block the light beam generated by the sensing unit 152, the sensing unit 152 will receive a signal from the trigger unit 151 to stop the movement of the driving component 120 and pause the sliding of the movable part 131, thereby reducing the risk of damage to the sampling needle 141.

[0034] The sample application assembly 140 of this embodiment includes a connector 142 and a sample application needle 141. The connector 142 is connected to the movable member 131, so that the force on the sample application assembly 140 is distributed on the connector 142. That is, when the sample application needle 141 collides, the sample application needle 141 will remain stationary with the collided external object. The driving component 120 continues to control the downward trend, so that the contradiction between the driving component 120 and the movement blockage is immediately transformed into the relative sliding displacement between the connector 142 and the movable member 131. The connector 142 moves upward relative to the movable member 131 to trigger the sensing unit 152. To a certain extent, the pressure on the sample application needle 141 during the process from the collision to the triggering of the sensing detection is reduced, and the risk of bending and damage to the sample application needle 141 is reduced. Furthermore, through the sliding connection between the movable part 131 and the connecting part 142, when the movement of the sampling needle 141 is obstructed, the contradiction between the driving of the driving component 120 and the obstruction of the sampling needle 141 can be transformed into a relative sliding displacement between the connecting part 142 and the movable part 131, so that the sensing unit 152 and the triggering unit 151 move towards each other to stop the operation of the sampling mechanism 100. This improves the response efficiency of the sampling mechanism 100, reduces the pressure time of the sampling needle 141, and further reduces the risk of damage to the sampling needle 141.

[0035] In some embodiments, see Figures 2 to 3As shown, the movable component 130 also includes a fixed plate 132, which is connected to the movable component 131. When the movable component 131 moves along the sampling direction, the fixed plate 132 also moves along with the movable component 131. In this embodiment, the trigger unit 151 is connected to the fixed plate 132, which has a bottom wall 1323. Taking a vertically downward sampling direction as an example, when the sampling mechanism 100 is in the first state, the bottom of the connecting component 142 abuts against the bottom wall 1323. The bottom wall 1323 provides support for the connecting component 142 in the opposite direction to the sampling direction. The supporting force provided by the bottom wall 1323 to the connecting component 142 and the weight of the connecting component 142 work together to keep the connecting component 142 and the fixed plate 132 relatively stationary. When the movable component 131 moves along the sampling direction, the connecting component 142 and the fixed plate 132 can move synchronously. When the sampling mechanism 100 is in the second working state, the sampling needle 141 collides with an external obstacle, thus obstructing the movement of the sampling needle 141, and the connecting member 142 and the sampling needle 141 stop moving. Since the fixed plate 132 is fixed to the movable member 131, the fixed plate 132 continues to move downward under the drive of the movable member 131. The connecting member 142 and the movable member 131 are slidably connected, thus causing relative sliding between the fixed plate 132 and the connecting member 142. The connecting member 142 will move from the bottom wall 1323 in a direction away from the bottom wall 1323 (upward) and separate from the bottom wall 1323, so that the trigger unit 151 triggers the sensing unit 152.

[0036] In some embodiments, see Figure 2 , Figure 3 and Figure 8 As shown, the sample feeding assembly 140 also includes a first elastic member 143, the two ends of which are connected to the movable member 131 and the connecting member 142 along the sampling direction, respectively. In the first working state and the second working state, the first elastic member 143 is pressed by the movable member 131 and the connecting member 142.

[0037] In a specific implementation, the connector 142 includes a sliding portion 1421 and a connecting portion 1422. The fixed plate 132 internally defines a movable cavity 1321, which has a top wall 1322 and a bottom wall 1323 disposed opposite to each other. A first elastic member 143 is disposed between the sliding portion 1421 and the top wall 1322 of the movable cavity 1321. The sliding portion 1421 and the top wall 1322 will compress the first elastic member 143, so that the sliding portion 1421 is subjected to a force applied by the first elastic member 143 along the sampling direction. When the sampling mechanism 100 is in the first working state, when the fixed plate 132 slides along the sampling direction following the movable member 131, the sliding portion 1421 will remain in contact with the bottom wall 1323 of the movable cavity 1321 under the action of the first elastic member 143, thereby achieving relative stillness and joint movement of the sliding portion 1421 and the fixed plate 132, thereby improving the activity efficiency of the sampling needle 141. When the sampling needle 141 collides with an external object, causing the sampling mechanism 100 to be in the second working state, the sliding part 1421 will slide relative to the moving part 131 and the fixed plate 132 to press the first elastic member 143 in a direction opposite to the sampling direction. The first elastic member 143 can provide a buffering effect for the sliding part 1421 to avoid rigid collision between the top of the sliding part 1421 and the fixed plate 132, thereby improving the movement safety of the sliding part 1421 and the sampling needle 141.

[0038] It is understood that, in one embodiment, see [reference] Figure 2 and Figure 3 As shown, the fixed plate 132 internally defines a movable cavity 1321. The cavity wall at the bottom of the movable cavity 1321 forms a bottom wall 1323. A portion of the movable component 131 is disposed in the movable cavity 1321, allowing the fixed plate 132 to be connected and fixed to the movable component 131 so that it can move along the sampling direction with the movable component 131. For specific implementation details, please refer to [reference needed]. Figure 2 and Figure 3As shown, the connector 142 includes a sliding portion 1421 and a connecting portion 1422. The sliding portion 1421 is disposed within the movable cavity 1321 and slidably connected to the movable component 131, specifically, the sliding portion 1421 abuts against the bottom wall 1323 of the movable cavity 1321. The connecting portion 1422 and the sampling needle 141 are disposed on the outside of the movable cavity 1321. The connecting portion 1422 connects the sliding portion 1421 and the sampling needle 141 so that the sampling needle 141 can move under the drive of the sliding portion 1421. When the sliding portion 1421 is assembled into the movable cavity 1321, the connecting portion 1422 covers the side wall of the movable cavity 1321 to close the movable cavity 1321, so that the sliding portion 1421 is accommodated and fixed in the movable cavity 1321. When the sampling mechanism 100 is in the first working state, the bottom of the sliding part 1421 abuts against the bottom wall 1323 of the fixed plate 132, and the bottom wall 1323 provides support for the sliding part 1421. When the sampling mechanism 100 is in the second working state, the sliding part 1421 drives the sampling needle 141 and the connecting part 1422 to slide relative to the moving part 131 and the fixed plate 132 so that they move from the bottom wall 1323 in a direction away from the bottom wall 1323 (upward), causing the trigger unit 151 to trigger the sensing unit 152.

[0039] Furthermore, it can be understood that, in one example, the cavity wall at the top of the movable cavity 1321 forms a top wall 1322, and the top wall 1322 and the bottom wall 1323 are disposed opposite each other along the sampling direction. A first distance exists between the sensing unit 152 and the trigger unit 151 along the sampling direction, and a second distance exists between the top end of the sliding portion 1421 and the top wall 1322 of the movable cavity 1321 along the sampling direction. The second distance is greater than or equal to the first distance. When the sliding portion 1421 slides relative to the movable member 131, the first distance and the second distance decrease synchronously.

[0040] Specifically, in the first working state (i.e., the normal sampling state), the sensing unit 152 and the trigger unit 151 are spaced apart along the sampling direction, and this distance is defined as the first distance. Simultaneously, the top end of the sliding part 1421 and the top wall 1322 are also spaced apart along the sampling direction, and this distance is defined as the second distance. In this embodiment, the first distance and the second distance are exemplarily described as equal. Since the sensing unit 152 is disposed on the fixed plate 132 and the trigger unit 151 is disposed on the connecting member 142; or, the trigger unit 151 is disposed on the fixed plate 132 and the sensing unit 152 is disposed on the connecting member 142, when the sampling needle 141 collides or encounters external resistance, the sliding part 1421 slides relative to the moving member 131 and the fixed plate 132, causing the first distance between the sensing unit 152 and the trigger unit 151 to decrease. At this time, the second distance between the top end of the sliding part 1421 and the top wall 1322 also decreases synchronously, and the first distance and the second distance always remain equal. When the trigger unit 151 triggers the sensing unit 152 (through magnetic induction, optical induction, or mechanical contact), the top end of the sliding part 1421 also comes into contact with the top wall 1322. In this embodiment, the top wall 1322 provides mechanical limiting and buffering for the sliding part 1421, preventing a hard collision between the sliding part 1421 and other components of the base 110 (such as the bottom structure) when the trigger unit 151 triggers the sensing unit 152, thereby preventing damage to the sliding part 1421 and the sampling needle 141. In addition, if there is a delay or failure in the detection relationship between the sensing unit 152 and the trigger unit 151, the top wall 1322 can also limit the upward stroke of the sliding part 1421 relative to the moving part 131 by limiting it, further preventing the sliding part 1421 from colliding with the base 110, and improving the reliability and safety of the sampling mechanism 100.

[0041] See Figure 3 and Figure 8 As shown, one possible implementation is that the sample application assembly 140 further includes a positioning pin 144 and a first elastic member 143. The two ends of the first elastic member 143 are respectively connected to the sliding portion 1421 of the fixed plate 132 and the connecting member 142 along the sampling direction. The positioning pin 144 is connected to the fixed plate 132 and housed in the movable cavity 1321. The positioning pin 144 passes through the interior of the first elastic member 143 from the end opposite to the sliding portion 1421 to limit the circumferential movement of the first elastic member 143, thereby providing guidance for the movement of the first elastic member 143.

[0042] Specifically, in one example, the top wall 1322 of the fixed plate 132 is provided with an opening for mounting the movable part 131. A fixing hole is provided on the side of the opening, which communicates with the movable cavity 1321. When the positioning pin 144 is assembled to the fixed plate 132, one end of the positioning pin 144 is received in the fixing hole, and the other end extends into the movable cavity 1321 along the sampling direction. The first elastic member 143 has a hollow structure inside. One end of the first elastic member 143 is connected to the fixed plate 132, and the other end is connected to the sliding part 1421. The positioning pin 144 passes through the hollow structure of the first elastic member 143. When the sliding part 1421 slides relative to the movable part 131, the sliding part 1421 will compress the first elastic member 143 to cause the first elastic member 143 to contract. By providing a positioning pin 144 inside the first elastic member 143, the positioning pin 144 can provide a guiding function for the first elastic member 143 when it is compressed, thereby preventing the first elastic member 143 from shifting its position during the compression process, thus improving the sliding stability of the sample feeding assembly 140.

[0043] Furthermore, in a further embodiment, see [reference]. Figure 3 As shown, the upper end of the first elastic member 143 abuts against the top wall 1322, and the lower end abuts against the sliding portion 1421. In this embodiment, the sliding portion 1421 includes a slider 1423 and an abutment portion 1424, both of which are housed within the movable cavity 1321. The second distance is the distance between the abutment portion 1424 and the top wall 1322. The slider 1423 is slidably connected to the movable member 131, and the abutment portion 1424 is connected to both sides of the connecting portion 1422. When the connecting portion 1422 and the slider 1423 are connected, the abutment portion 1424 will be positioned between the slider 1423 and the side wall of the fixing plate 132. The first elastic member 143 will abut against the top wall 1322 of the fixing plate 132 and the top of the slider 1423. The top height of the abutment part 1424 will be higher than the top height of the slider 1423. When the sampling mechanism 100 is in the second working state, when the trigger unit 151 triggers the sensing unit 152, the second elastic member 133 will be compressed between the slider 1423 and the top wall 1322, and the abutment part 1424 will abut against the top wall 1322 of the fixing plate 132.

[0044] In one example, the sampling mechanism 100 also includes a control module and an alarm module. The sensing component 150, the driving component 120, and the alarm module are all communicatively connected to the control module. The control module receives trigger information generated by the sensing component 150 and controls the driving component 120 and the alarm module to perform corresponding operations. When the sampling mechanism 100 is in its second operating state, the control module stops the driving component 120 based on the trigger information from the sensing component 150, causing the sampling component 140 to stop moving along the sampling direction, and controls the alarm module to sound an alarm.

[0045] Specifically, when the sampling needle 141 collides with an external object, the connecting member 142 will displace relative to the movable member 131, causing the trigger unit 151 and the sensing unit 152 to move towards each other. When the trigger unit 151 triggers the sensing unit 152, the sensing unit 152 generates trigger information, which is fed back to the control module. The control module will control the drive component 120 to stop working based on the trigger information from the sensing unit 152 and the trigger unit 151. At this time, the relative sliding between the movable member 131 and the connecting member 142 will stop, thereby stopping the movement of the sampling needle 141 and preventing further damage to the sampling needle 141. At the same time, the control module will also trigger the alarm module to alert the operator.

[0046] Furthermore, in some embodiments, see [reference] Figures 1 to 3 As shown, the active component 130 also includes a second elastic member 133. The upper end of the second elastic member 133 along the sampling direction is connected to the base 110, and the lower end is connected to the fixing plate 132. The second elastic member 133 is stretched by the fixing plate 132 and the connector 142 and generates a reverse elastic force to lift the fixing plate 132 and the connector 142, so as to prevent the sampling component 140 from falling off in the event of an unexpected power outage. Specifically, in one example, see [reference needed]. Figure 2 As shown, the fixed plate 132 has a fixing groove 1324 at the end opposite to the base 110. The upper end of the second elastic member 133 is connected to the base 110, and the lower end is connected to the fixing groove 1324. In a static state, the second elastic member 133 is in a stretched state due to the weight of the fixed plate 132 and the connecting member 142. Since the movable member 131 is slidably connected to the base 110 and the connecting member 142 is slidably connected to the fixed plate 132, in a static state, the bottom wall 1323 of the fixed plate 132 abuts against the connecting member 142 to provide support for the connecting member 142, while the second elastic member 133 hooks into the fixing groove 1324 to provide support for the movable member 131 and the fixed plate 132. This prevents the movable component 130 and the sample application component 140 from sliding relative to the base 110 in the sampling direction under their own weight, which could cause the sample application needle 141 to fall and be damaged. In other embodiments, the second elastic element 133 may also be connected to the top or side of the fixing plate 132 to provide support for the fixing plate 132.

[0047] Understandably, in one example, see Figure 1 , Figure 2 and Figure 7As shown, the sampling mechanism 100 also includes a shock absorber 160, which is connected to the side of the base 110 facing the connector 142 along the sampling direction. When the sampling needle 141 moves in the opposite direction to the sampling direction following the movable member 131, the sampling needle 141 has a first limit position. When the sampling needle 141 moves to the first limit position, the connector 142 abuts against the shock absorber 160.

[0048] Specifically, after the sampling needle 141 completes sampling, the sampling needle 141 and the connecting member 142 will move in the opposite direction to the sampling direction under the drive of the movable member 131. In this embodiment, with vertical upward as the direction opposite to the sampling direction, the sampling needle 141 has a maximum upward stroke in the vertical upward direction. After the sampling needle 141 moves upward through the maximum upward stroke distance, the sampling needle 141 will be at the first limit position and will no longer move upward. At this time, the connecting member 142 abuts against the shock absorber 160. In this embodiment, by setting the shock absorber 160, the connecting member 142 can be protected and buffered, and the connecting member 142 is limited to restrict the upward stroke of the connecting member 142 and the sampling needle 141, avoiding the collision between the connecting member 142 and the bottom of the base 110, which would cause damage to the connecting member 142 and the sampling needle 141, and improving the safety of the sampling assembly 140.

[0049] In one embodiment, see Figure 1 and Figure 8 As shown, the movable component 130 includes a first limiting member 134 and a second limiting member 135. The first limiting member 134 is connected to the end of the movable component 131 opposite to the connecting member 142, i.e., the upper end of the movable component 131. The second limiting member 135 is connected to the base 110. The first limiting member 134 and the second limiting member 135 correspond to each other along the sampling direction. When the movable component 131 is driven by the driving component 120 to drive the sampling needle 141 to move along the sampling direction, the sampling needle 141 will have a second limit position. When the sampling needle 141 is in the second limit position, the first limiting member 134 and the second limiting member 135 will abut against each other, and the second limiting member 135 will prevent the movable component 131 from continuing to move along the sampling direction by restricting the movement of the first limiting member 134.

[0050] A second aspect of the present invention provides a blood typing analyzer, which includes the sampling mechanism 100 described in any of the above embodiments.

[0051] Specifically, in one example, the blood typing analyzer also includes a conveying mechanism, a reading mechanism, a centrifuge, etc. The sampling mechanism 100 is installed on the conveying mechanism. The conveying mechanism is not limited to being a robot or a multi-axis module. The conveying mechanism is used to drive the sampling mechanism 100 to change position, so that the sampling mechanism 100 can be transferred between different stations. For example, the sampling mechanism 100 can be moved to the sample loading position and aspirate the sample. Then, the sampling mechanism 100 can be moved to the blood card loading position and the sample can be added into the detection hole of the blood card. The blood card after the sample is added is transferred to the centrifuge for centrifugation. After being read by the reading mechanism, the blood typing analysis of the sample is completed.

[0052] The blood typing analyzer of this embodiment of the invention, through the cooperation of the trigger unit 151 and the sensing unit 152, can pause the operation of the sampling mechanism 100 to process the sampling needle 141 when it collides with an external object. Furthermore, the force on the sampling assembly 140 is distributed on the connector 142, which can reduce the pressure on the sampling needle 141 when it collides with an external object and reduce the risk of bending and damage to the sampling needle 141.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A sampling mechanism, characterized in that, include: Base; The drive component is mounted on the base; An active component includes a movable part that is slidably connected to the base; A sample dispensing assembly includes a sample dispensing needle and a connector. The sample dispensing needle is mounted on the connector, and the connector is slidably connected to a movable component. A driving component is connected to the movable component and can drive the movable component to move so that the sample dispensing needle can move along the sampling direction to a preset position to dispense liquid substances. The sliding direction of the connector and the sliding direction of the movable component are both parallel to the sampling direction. A sensing component includes a sensing unit and a triggering unit, wherein one of the sensing unit and the triggering unit is connected to the movable member, and the other is connected to the connecting member; The sampling mechanism has a first working state and a second working state. In the first working state, the sensing unit and the triggering unit are spaced apart along the sampling direction, the connecting member and the movable member remain relatively stationary, and can move together along the sampling direction. In the second working state, the movement of the sampling needle along the sampling direction is blocked, the connecting member moves relative to the movable member, causing the triggering unit to trigger the sensing unit, so that the driving component stops driving the sampling assembly to move along the sampling direction.

2. The sampling mechanism according to claim 1, characterized in that, The movable component further includes a fixing plate, which is connected to the movable component and can move along the sampling direction with the movable component. The fixing plate has a bottom wall. In the first working state, the bottom of the connector abuts against the bottom wall; in the second working state, the connector moves away from the bottom wall and separates from the bottom wall.

3. The sampling mechanism according to claim 2, characterized in that, The sampling assembly further includes a first elastic element, which is connected to the movable element and the connecting element at both ends along the sampling direction, and applies an elastic force to the connecting element to make the connecting element tend to move away from the movable element.

4. The sampling mechanism according to claim 2, characterized in that, The fixed plate defines a movable cavity inside, and the cavity wall at the bottom of the movable cavity forms the bottom wall. Part of the movable component is disposed in the movable cavity. The connecting component includes a sliding part and a connecting part. The sliding part is slidably connected to the movable component and disposed in the movable cavity. The connecting part is connected to the sample dispensing needle and the sliding part. In the first working state, the bottom of the sliding part abuts against the bottom wall; in the second working state, the sliding part drives the connecting part to slide relative to the movable part.

5. The sampling mechanism according to claim 4, characterized in that, The cavity wall at the top of the active cavity forms a top wall. There is a first distance between the sensing unit and the triggering unit along the sampling direction. There is a second distance between the top of the sliding part and the top wall along the sampling direction. The second distance is not less than the first distance. In the second working state, when the triggering unit triggers the sensing unit, the top of the sliding part abuts against the top wall.

6. The sampling mechanism according to claim 5, characterized in that, The sample feeding assembly further includes a first elastic element and a positioning pin. The two ends of the first elastic element along the sampling direction are respectively connected to the fixed plate and the connecting member. The upper end of the first elastic element abuts against the top wall, and the lower end of the first elastic element abuts against the sliding part. The positioning pin is disposed in the movable cavity and connected to the top wall. The positioning pin passes through the interior of the first elastic element.

7. The sampling mechanism according to any one of claims 1 to 6, characterized in that, The sampling mechanism also includes a control module and an alarm module, and the sensing component, the driving component and the alarm module are all communicatively connected to the control module; In the second working state, the control module, based on the trigger information of the sensing component, causes the driving component to stop operating to pause the sliding of the moving part, and simultaneously controls the alarm module to sound an alarm.

8. The sampling mechanism according to any one of claims 2 to 6, characterized in that, The movable component further includes a second elastic element, the upper end of which is connected to the base and the lower end of which is connected to the fixing plate. The second elastic element is used to apply an elastic force to the fixing plate so that the fixing plate tends to move closer to the base.

9. The sampling mechanism according to claim 1, characterized in that, In the opposite direction of the sampling direction, the sampling needle has a first limit position. The sampling mechanism also includes a shock absorber connected to the base. When the sampling needle moves to the first limit position, the connecting member abuts against the shock absorber. And / or, along the sampling direction, the sampling needle has a second limit position, and the movable component further includes a first limiting member and a second limiting member, the first limiting member being connected to the movable component, and the second limiting member being connected to the base. When the sampling needle moves to the second limit position, the first limiting member abuts against the second limiting member to restrict the movement of the movable component.

10. A blood typing analyzer, characterized in that, include: The sampling mechanism as described in any one of claims 1 to 9, wherein the sampling needle is used for sampling.

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