A pipette for medical testing

Abstract

This utility model discloses a pipette for medical testing, belonging to the field of medical testing technology. It includes a pipette body and a disassembly assembly. The pipette body includes a connecting tube for connecting a pipette tip. The disassembly assembly includes a movable push tube and a rotating abutment unit. The rotating abutment unit includes a drive head, an elastic connector, and an abutment unit arranged sequentially. The push tube and the abutment unit are both sleeved on the connecting tube. The drive head is integrally connected to the end of the push tube. The drive head can drive the abutment unit to move axially and rotate circumferentially relative to the pipette tip, thus disassembling the pipette tip. The two ends of the elastic connector are respectively connected to the drive head and the abutment unit to separate the drive head and the abutment unit when external force is released. This utility model enables the pipette tip to rotate and disengage, reducing the frictional resistance of the pipette tip and facilitating its removal.

Description

Technical Field

[0001] This utility model belongs to the field of medical testing technology, and in particular relates to a pipette for medical testing. Background Technology

[0002] Pipettes are commonly used instruments in biological and chemical laboratories for transferring small amounts of liquid. When used with disposable pipette tips, they enable precise, quantitative, and micro-volume pipetting.

[0003] Existing pipettes allow the pipette tip to be removed by pressing a tip release button and using a push tube located outside the connecting tube. However, to maintain a tight seal between the pipette tip and the pipette, the pipette tip is clamped tightly to the pipette, making it difficult to remove the pipette tip using the push tube. Summary of the Invention

[0004] In view of this, it is necessary to provide a pipette for medical testing to solve the problem that existing pipette tips are difficult to remove.

[0005] This utility model provides a pipette for medical testing, comprising:

[0006] The gun body includes a connecting tube for connecting a pipette tip;

[0007] The disassembly assembly includes a movable push tube and a rotating abutment unit. The rotating abutment unit includes a drive head, an elastic connector, and an abutment unit arranged sequentially. The push tube and the abutment unit are both sleeved on the connecting tube. The drive head is integrally connected to the end of the push tube. The drive head can drive the abutment unit to move axially and rotate circumferentially relative to the pipette tip to disassemble the pipette tip. The two ends of the elastic connector are respectively connected to the drive head and the abutment unit so as to separate the drive head and the abutment unit when the external force is released.

[0008] Furthermore, the end of the drive head is provided with at least one drive portion, and the abutment is provided with at least one inclined portion relative to one end of the drive head. The drive portion can abut against the inclined portion, driving the abutment to move axially and rotate circumferentially relative to the pipette tip.

[0009] Furthermore, the inclined portion has an inclined surface that is positioned relative to the driving portion; the driving portion and the inclined portion are arranged in a one-to-one correspondence, and a plurality of the driving portions are arranged at equal intervals relative to the axis of the connecting pipe.

[0010] Furthermore, the end of the contact joint opposite the pipette tip is provided with a friction layer, which can enhance the circumferential friction between the contact joint and the pipette tip.

[0011] Furthermore, the friction layer includes a plurality of friction teeth arranged circumferentially.

[0012] Furthermore, the end of the driving head away from the abutment is provided with a first flange, and the end of the abutment away from the driving head is provided with a second flange. The two ends of the elastic connector are respectively sleeved on the driving head and the abutment. The two ends of the elastic connector are respectively fixedly connected to the first flange and the second flange. The elastic connector can drive the abutment to rotate and reset.

[0013] Furthermore, the elastic connector is a compression spring.

[0014] Furthermore, the release assembly also includes a release button, which is disposed on the gun body and connected to the push tube to drive the push tube to move.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The medical testing pipette of this invention is equipped with a release assembly, which includes a movable push tube and a rotating abutment unit. The rotating abutment unit includes a drive head, an elastic connector, and an abutment unit arranged in sequence. Both the push tube and the abutment unit are sleeved on the connecting tube. The drive head is integrally connected to the end of the push tube. The push tube can drive the drive head to move together. The drive head can drive the abutment unit to move axially and rotate circumferentially relative to the pipette tip. The combined rotation and axial motion weakens friction and clamping force, reduces pull-out resistance, and forms a "torsion" effect, making it easier for the pipette tip to detach from the connecting tube under the combined action of rotation and pull-out. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the unloading component in this utility model. Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the unloading component in this utility model. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the unloading component in this utility model. Figure 3 ;

[0022] Figure 5 This is a schematic diagram of the abutment joint in this utility model.

[0023] In the diagram, 100 represents the gun body; 110 represents the connecting pipe.

[0024] Release assembly; 210, push tube; 220, rotating abutment unit; 221, drive head; 221a, drive part; 221b, first flange; 222, elastic connector; 223, abutment joint; 223a, inclined part; 223b, friction layer; 223c, second flange; 230, release button;

[0025] 300. Pipettes. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0027] This utility model provides a pipette for medical testing, relating to the field of medical testing technology. By setting a release component 200 at the connection position between the pipette and the pipette tip 300, the release component 200 can drive the pipette tip 300 to rotate relative to it while axially impacting the pipette tip 300, thereby causing the pipette tip 300 to rotate out, reducing the frictional resistance of the pipette tip 300 and facilitating the removal of the pipette tip 300.

[0028] Please see Figures 1 to 5 As shown, a medical testing pipette in this embodiment includes a pipette body 100 and a removal assembly 200. The pipette body 100 is provided with a connecting tube 110 for connecting to a pipette tip 300. The connecting tube 110 can be connected to different disposable pipette tips 300 as needed. The removal assembly 200 can screw on and remove the pipette tip 300, facilitating the removal of the pipette tip 300.

[0029] Please see Figures 1 to 5 As shown, the unloading assembly 200 includes a movable push tube 210 and a rotating abutment unit 220. The rotating abutment unit 220 includes a drive head 221, an elastic connector 222, and an abutment 223 arranged sequentially. The push tube 210 and the abutment 223 are both sleeved on the connecting tube 110. The drive head 221 is integrally connected to the end of the push tube 210. The push tube 210 can drive the drive head 221 to move together. The drive head 221 can drive the abutment 223 to move axially and rotate circumferentially relative to the pipette tip 300. The combined rotation and axial motion weakens friction and clamping force, reduces pull-out resistance, and forms a "torsion" effect, making it easier for the pipette tip to detach from the connecting tube 110 under the combined action of rotation and pull-out.

[0030] The two ends of the elastic connector 222 are connected to the drive head 221 and the abutment 223 respectively. When the external force is released, the elastic connector 222 can separate the drive head 221 and the abutment 223 for secondary operation.

[0031] In some embodiments, please refer to Figures 2 to 5 As shown, the end of the drive head 221 is provided with at least one drive portion 221a, and the end of the abutment relative to the drive head 221 is provided with at least one inclined portion 223a. The drive portion 221a can abut against the inclined portion 223a under the action of external force. The abutment action can generate additional pushing force and rotational force, enabling the abutment 223 to not only move axially (to disassemble the pipette tip), but also to apply a circumferential rotational force, generating a compound motion. The compound motion allows the pipette tip 300 to detach axially during disassembly, and further reduces the possibility of friction and jamming through rotation, thereby enhancing the efficiency of removing the pipette tip.

[0032] The contact angle and surface structure of the inclined part 223a and the driving part 221a optimize the transmission of driving force, so that the force generated during the operation of the push tube 210 is effectively transmitted to the suction head, and friction and jamming are reduced.

[0033] As a further embodiment, the inclined part 223a has an inclined surface that is disposed relative to the driving part 221a. When the driving part 221a contacts the inclined surface, it can generate a precise pushing angle, thereby effectively driving the abutment 223 to move axially while applying a certain circumferential rotational force, making disassembly smoother. Especially when the connection between the suction head and the gun body 100 is tight, it reduces the resistance to disassembly.

[0034] Multiple drive units 221a are equidistantly arranged, corresponding one-to-one with the tilting units 223a, which enables a more uniform distribution of force. When the user operates the push tube 210, the multiple drive units 221a simultaneously contact the corresponding tilting surfaces and apply force, forming a unified pushing effect. This uniformly distributed force prevents the pipette tip 300 from getting stuck on one side or experiencing uneven force during disassembly, avoiding jamming or difficulty in disassembly caused by excessive force at a single point.

[0035] Because the multiple drive units 221a are equidistantly arranged, the force distribution is more balanced, avoiding excessive friction or wear caused by eccentric force, thereby improving the stability and durability of the pipette.

[0036] In another embodiment, the outer wall of the drive head 221 is provided with a spiral groove, the drive head 221 is sleeved on the abutment 223, the abutment 223 is provided with a protrusion protruding from the push tube 210, the protrusion is engaged in the spiral groove, and the two ends of the elastic connector 222 are respectively connected to the drive head 221 and the abutment 223.

[0037] The spiral groove on the outer wall of the drive head 221 and the protrusion on the abutment 223 engage to form a spiral drive structure. When the drive head 221 moves relative to the abutment 223, the engagement between the spiral groove and the protrusion generates a continuous rotational driving force, allowing the rotation of the drive head 221 to be directly converted into an axial thrust force on the abutment 223, while simultaneously applying a circumferential rotational force. The spiral groove ensures that the suction head not only moves axially during disassembly but also applies a precise rotational force, making disassembly smoother, especially when the suction head is tightly connected to the gun body 100, reducing jamming.

[0038] Meanwhile, the locking mechanism of the spiral groove and the protrusion makes the connection between the drive head 221 and the abutment 223 more stable and firm, avoiding loosening or slippage during operation and improving the stability of the operation process.

[0039] In some embodiments, please refer to Figure 4 As shown, the end of the abutment 223 opposite to the pipette tip 300 is provided with a friction layer 223b, which can effectively enhance the contact friction between the abutment 223 and the pipette tip 300. During disassembly, when the drive head 221 rotates and pushes the abutment 223, the friction layer 223b can increase the friction between it and the pipette tip 300, so that the pipette tip 300 can be more firmly connected to the abutment 223, thereby effectively improving the force transmission efficiency during disassembly.

[0040] The increased friction provides better traction when the pipette tip is tight or difficult to remove, thus preventing the pipette tip 300 from slipping or being incompletely removed.

[0041] The friction layer 223b includes multiple circumferentially arranged friction teeth. These teeth significantly enhance circumferential friction by increasing the frictional effect of the contact surface. When the drive head 221 rotates and pushes the abutment 223, the contact area between the friction teeth and the pipette tip 300 increases, resulting in stronger friction. The friction teeth help increase the traction force during disassembly, making tip disassembly easier and more effective. Especially when the tip is tightly clamped, the friction teeth effectively enhance the gripping force between the tip and the pipette body 100, preventing the tip from loosening or slipping during disassembly.

[0042] The friction teeth provide more uniform frictional contact, allowing all contact points to apply balanced force simultaneously during disassembly. This prevents uneven disassembly of the pipette tip 300 due to excessive localized force. In this way, the disassembly process is more stable, and the force distribution is more even. Users can more precisely control the disassembly process, avoiding tip deformation or damage.

[0043] In some embodiments, please refer to Figure 4As shown, the end of the drive head 221 away from the abutment 223 has a first flange 221b, and the end of the abutment 223 away from the drive head 221 has a second flange 223c. The flanges protrude radially from the drive head 221 and the abutment 223. The two ends of the elastic connector 222 are respectively sleeved on the drive head 221 and the abutment 223, and the two ends of the elastic connector 222 are fixedly connected to the first flange 221b and the second flange 223c, respectively.

[0044] The first flange 221b and the second flange 223c ensure that the elastic connector 222 is securely fitted between the drive head 221 and the abutment 223. The flanges create a strong fixing point for the elastic connector 222 at the connection, effectively preventing it from slipping or loosening during use. This stable fixing method allows the elastic connector 222 to transmit rotational and resetting power between the drive head 221 and the abutment 223, while ensuring the overall stability of the structure.

[0045] The elastic connector 222, through its function of driving the abutment 223 to rotate and reset, enables the abutment 223 to remain in a standard or original position after disassembly. When the drive head 221 is released or operation stops, the elastic properties of the elastic connector 222 automatically drive the abutment 223 back to its initial position, preventing the abutment 223 from shifting or jamming due to long-term use or improper operation, thus ensuring the accuracy and consistency of each operation.

[0046] The elastic connector 222 is a compression spring, which provides a stable and adjustable restoring force. When the drive head 221 and the abutment 223 are displaced during operation, the compression spring, based on its elastic properties, generates a reverse restoring force after an external force is applied, restoring the abutment 223 to the predetermined position. This ensures consistent restoring performance after each disassembly or tip replacement, guaranteeing the pipette's operational accuracy and reliability.

[0047] Compression springs provide continuous elastic restoring force under prolonged and frequent operation. Their materials and design ensure that they can withstand multiple compression and release actions without easily losing elasticity or breaking.

[0048] In some embodiments, please refer to Figure 1 The removal assembly 200 also includes a removal button 230, which is located on the pipette body 100 and connected to the push tube 210. The user can drive the push tube 210 by pressing the removal button 230, which makes the disassembly process of the pipette tip 300 easier and more convenient.

[0049] Workflow: First, gently install the selected pipette tip 300 onto the end of the pipette's connecting tube 110. Typically, the pipette tip 300 needs to be fully inserted into the tip interface to ensure a good seal.

[0050] Next, press the piston button on the pipette until you feel the first "resistance," meaning the piston is pressed to the bottom (usually two different levels of resistance). Then, immerse the pipette tip in the liquid, release the piston, and the tip will begin to draw the liquid. When drawing liquid, avoid touching the bottom of the container or the surface of the liquid to prevent introducing air bubbles or contamination.

[0051] Next, transfer the aspirated liquid to the target container or test tube, and press the piston button on the pipette to release the liquid into the target container. The release is typically achieved in two stages by pressing the button to ensure accuracy.

[0052] Finally, gently press the release button 230 on the pipette. The drive head 221 can drive the contact point 223 to move axially and rotate circumferentially relative to the pipette tip 300, thereby pushing the pipette tip 300 to rotate and fall off.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A pipette for medical testing, characterized in that, include: The gun body includes a connecting tube for connecting a pipette tip; The disassembly assembly includes a movable push tube and a rotating abutment unit. The rotating abutment unit includes a drive head, an elastic connector, and an abutment unit arranged sequentially. The push tube and the abutment unit are both sleeved on the connecting tube. The drive head is integrally connected to the end of the push tube. The drive head can drive the abutment unit to move axially and rotate circumferentially relative to the pipette tip to disassemble the pipette tip. The two ends of the elastic connector are respectively connected to the drive head and the abutment unit so as to separate the drive head and the abutment unit when the external force is released.

2. The pipette for medical testing according to claim 1, characterized in that: The end of the drive head is provided with at least one drive part, and the abutment is provided with at least one inclined part opposite to one end of the drive head. The drive part can abut against the inclined part and drive the abutment to move axially and rotate circumferentially relative to the pipette tip.

3. A pipette for medical testing according to claim 2, characterized in that: The inclined portion has an inclined surface that is positioned relative to the driving portion; the driving portion and the inclined portion are arranged in a one-to-one correspondence, and a plurality of the driving portions are arranged at equal intervals relative to the axis of the connecting pipe.

4. A pipette for medical testing according to claim 1, characterized in that: The end of the connector opposite the pipette tip is provided with a friction layer, which can enhance the circumferential friction between the connector and the pipette tip.

5. A pipette for medical testing according to claim 4, characterized in that: The friction layer includes a plurality of friction teeth arranged circumferentially.

6. A pipette for medical testing according to claim 1, characterized in that: The drive head has a first flange at the end away from the abutment, and the abutment has a second flange at the end away from the drive head. The two ends of the elastic connector are respectively sleeved on the drive head and the abutment, and the two ends of the elastic connector are respectively fixedly connected to the first flange and the second flange. The elastic connector can drive the abutment to rotate and reset.

7. A pipette for medical testing according to claim 6, characterized in that: The elastic connector is a compression spring.

8. A pipette for medical testing according to claim 1, characterized in that: The release assembly also includes a release button, which is disposed on the gun body and connected to the push tube to drive the push tube to move.

Images