Pipette assembly and pipette

Abstract

The utility model discloses a pipettor assembly structure and pipettor, pipettor assembly structure includes first casing and second casing, forms the installation mouth, the clamping groove and the deformation part between installation mouth and clamping groove on the first casing, is equipped with the groove structure on the deformation part, and the second casing includes the clamping of clamping groove. In the process of clamping of the clamping part in the clamping groove, the clamping part interferes with the deformation part to make the deformation part produce radial deformation. The utility model can reduce the thickness of the deformation part around the groove structure through the groove structure, reduces the rigidity of the deformation part, makes the deformation part more easily produce radial expansion under the extrusion of the clamping part, reduces the difficulty of the clamping part and enters the clamping groove, improves the assembly efficiency of pipettor.

Description

Technical Field

[0001] This utility model belongs to the field of pipette technology, specifically relating to a pipette assembly structure and a pipette. Background Technology

[0002] Pipettes are primarily used for transferring and dispensing liquids and are among the most commonly used instruments in laboratories. A pipette contains numerous internal components, most of which are connected by a snap-fit ​​structure consisting of slots and locking parts. However, during the process of locking the locking part into the slot, the locking part typically needs to compress the shell wall surrounding the slot, causing deformation of the shell wall to secure the locking part within the slot.

[0003] This connection method requires the assembler to apply a large force to the pipette components in order to deform the shell wall around the slot, making the pipette assembly process very laborious.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a pipette assembly structure that solves the problem of difficult assembly of pipette components.

[0006] To achieve the above objectives, a specific embodiment of this utility model provides a pipette assembly structure, including a first housing and a second housing. The first housing has a mounting port, a slot, and a deformable portion located between the mounting port and the slot. The deformable portion has a groove structure. The second housing includes a snap-fit ​​portion that engages with the slot. During the engagement of the snap-fit ​​portion with the slot, the snap-fit ​​portion interferes with the deformable portion, causing the deformable portion to undergo radial deformation.

[0007] In one or more embodiments of this utility model, one side of the groove structure extends through to the groove wall near the mounting opening of the card slot.

[0008] In one or more embodiments of this utility model, the other side of the groove structure extends through to the end face of the mounting port.

[0009] In one or more embodiments of this utility model, the groove structure penetrates the deformed portion along its concave direction.

[0010] In one or more embodiments of this utility model, the groove structure includes a first groove structure and a second groove structure, which are respectively disposed at both ends of the slot along the circumference of the first housing.

[0011] In one or more embodiments of this utility model, the snap-fit ​​portion includes a first snap-fit ​​end and a second snap-fit ​​end distributed at both ends of its circumference, and the first groove structure and the second groove structure are formed on the inner wall of the deformable portion.

[0012] In one or more embodiments of this utility model, during the process of the snap-fit ​​part being snapped into the slot, the first snap-fit ​​end passes through the first slot structure without interference, and the second snap-fit ​​end passes through the second slot structure without interference.

[0013] In one or more embodiments of this utility model, the mounting opening is formed with a guide surface, and the snap-fit ​​portion is snapped into the slot via the guide surface.

[0014] In one or more embodiments of this utility model, the groove structure includes a first groove structure and a second groove structure, the deformable part includes a thick-walled section located between the first groove structure and the second groove structure, and the arc length of the guide surface is greater than the arc length of the thick-walled section.

[0015] In one or more embodiments of this utility model, the arc length of the guide surface is greater than the arc length of the slot.

[0016] In another aspect, this utility model also provides a pipette, including the above-mentioned pipette assembly structure, and a window is provided on the peripheral wall of the first housing or the second housing.

[0017] In one or more embodiments of this utility model, the window is opened on the first housing and extends through the groove wall on the side of the card slot away from the mounting opening.

[0018] Compared with the prior art, the groove structure on the first shell of this utility model can reduce the thickness of the deformable part around the groove structure and reduce the stiffness of the deformable part, making it easier for the deformable part to expand radially under the pressure of the snap-fit ​​part, reducing the difficulty of the snap-fit ​​part being snapped into the slot and improving the assembly efficiency of the pipette. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the pipette assembly structure in one embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the pipette assembly structure in one embodiment of the present invention;

[0022] Figure 3This is a three-dimensional structural view of the first housing in one embodiment of the present invention from a certain perspective;

[0023] Figure 4 This is a perspective view of the first housing in one embodiment of the present invention from another angle;

[0024] Figure 5 This is a three-dimensional structural diagram of the groove structure located on the inner wall of the deformed part in one embodiment of the present invention;

[0025] Figure 6 This is a perspective view of the second housing in one embodiment of the present invention;

[0026] Figure 7 This is a three-dimensional structural diagram of the groove structure located on the outer wall of the deformed part in one embodiment of the present invention;

[0027] Figure 8 This is a three-dimensional structural diagram of the groove structure located on the inner wall of the deformed part in another embodiment of the present invention;

[0028] Figure 9 This is a three-dimensional structural diagram of the groove structure located on the inner wall of the deformed part in another embodiment of the present invention;

[0029] Figure 10 This is a three-dimensional structural diagram of the groove structure penetrating the deformation part in one embodiment of the present invention.

[0030] Explanation of main reference numerals: 1. First housing; 11. Accommodating cavity; 12. Mounting port; 121. Guide surface; 13. Slot; 131. First slot wall; 132. Second slot wall; 14. Slot structure; 141. First slot structure; 142. Second slot structure; 15. Deformation part; 151. Thick-walled section; 16. Window; 2. Second housing; 21. Insertion end; 22. Snap-fit ​​part; 221. First snap-fit ​​end; 222. Second snap-fit ​​end; 23. Main body part; 24. Boss part; 3. Transparent part; 4. Digital wheel assembly. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "top", "bottom", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In one embodiment, reference is made to Figures 1 to 4 As shown, this application provides a pipette assembly structure, which includes a first housing 1 and a second housing 2 that are interlocked with each other.

[0035] Specifically, the first housing 1 has an internal accommodating cavity 11, which may completely penetrate the first housing 1 or only penetrate a portion of the first housing 1. One end of the first housing 1 has an mounting port 12, which communicates with the accommodating cavity 11. A slot 13 is formed on the circumferential wall of the accommodating cavity 11 (i.e., the circumferential inner wall of the first housing 1). The second housing 2 includes a plug-in end 21 and a locking portion 22 disposed on the plug-in end 21. The plug-in end 21 is inserted into the accommodating cavity 11 via the mounting port 12, and the locking portion 22 is engaged in the slot 13, thereby fixing the first housing 1 and the second housing 2 together.

[0036] Furthermore, the shell wall of the first housing 1 between the slot 13 and the mounting port 12 forms a deformable portion 15. During the process of the insertion end 21 of the second housing 2 being inserted into the receiving cavity 11 through the mounting port 12, the locking portion 22 of the second housing 2 protrudes relatively, causing the size of the insertion end 21 to not be completely matched with the size of the receiving cavity 11. This results in the insertion end 21 being squeezed outwards by the deformable portion 15 (i.e., the deformable portion 15 expands radially). After the deformable portion 15 deforms, it provides sufficient space for the insertion end 21 to reduce the difficulty of the insertion end 21 moving in the receiving cavity 11, and finally allows the locking portion 22 to be successfully locked in the slot 13.

[0037] Furthermore, a groove structure 14 is formed on the deformable part 15. The groove structure 14 is located between the slot 13 and the mounting port 12. The groove structure 14 is used to reduce the thickness of a local area of ​​the deformable part 15, thereby reducing the overall rigidity of the deformable part 15. This makes it easier for the deformable part 15 to expand radially under the pressure of the insertion end 21, reducing the difficulty of the insertion part 22 being inserted into the slot 13 and improving the assembly efficiency of the first housing 1 and the second housing 2.

[0038] In one embodiment, reference is made to Figures 3 to 5 As shown, the slot 13 extends from the inner wall of the first housing 1 to the outer wall of the first housing 1, that is, the slot 13 completely penetrates the circumferential shell wall of the first housing 1. On the one hand, it can provide more accommodating space for the locking part 22, which is conducive to the locking part 22 restoring its original shape. On the other hand, it can also expose the outer edge of the locking part 22 from the accommodating cavity 11, which is convenient for applying force to the locking part 22 from the outside of the first housing 1 during later maintenance, so that the locking part 22 can be disengaged from the slot 13, thereby separating the first housing 1 and the second housing 2.

[0039] Furthermore, the first housing 1 has two slots 13, which are arranged opposite each other along the radial direction of the first housing 1. The second housing 2 also has two corresponding latching parts 22, which are engaged with the two slots 13 in a one-to-one manner.

[0040] It should be understood that the number and position of the card slots 13 and the card contacts 22 described above are merely illustrative examples and do not constitute a limitation on the embodiments of this application. In addition to the above examples, the number of card slots 13 and card contacts 22 may also be set to one, three or more, as long as a relatively stable connection relationship is ensured between the first housing 1 and the second housing 2.

[0041] Similarly, the positions of the card slot 13 and the card connector 22 can be adjusted according to the actual situation.

[0042] In one embodiment, reference is made to Figure 5 As shown, the groove structure 14 is formed on the inner wall of the deformable part 15.

[0043] In another embodiment, reference Figure 7 As shown, the groove structure 14 can also be formed on the outer wall of the deformable part 15. Alternatively, the groove structure 14 can also be formed on both the inner and outer walls of the deformable part 15.

[0044] In one embodiment, reference is made to Figure 4 and Figure 5 As shown, the groove structure 14 does not penetrate the deformable part 15 in the radial direction. The groove structure 14 penetrates from the groove wall of the slot 13 near the mounting port 12 to the end face of the mounting port 12, further reducing the rigidity of the deformable part 15.

[0045] In an alternative embodiment, refer to Figure 8 As shown, the groove structure 14 extends through the groove wall of the card slot 13 near the mounting port 12 on only one side, and does not extend through the end face of the mounting port 12 on the other side.

[0046] In another alternative embodiment, refer to Figure 9 As shown, the groove structure 14 extends to the end face of the mounting port 12 on only one side, while the other side does not extend to the groove wall of the slot 13 near the mounting port 12.

[0047] In yet another alternative embodiment, refer to Figure 10 As shown, the groove structure 14 can also penetrate the deformable portion 15 along its concave direction. In this case, the groove structure 14 cannot simultaneously penetrate to both the groove wall of the slot 13 near the mounting opening 12 and the end face of the mounting opening 12. At most, only one side can penetrate to either the groove wall of the slot 13 near the mounting opening 12 or the end face of the mounting opening 12. It should be understood that the above-described groove structure 14 is merely illustrative and does not constitute a limitation on the embodiments of this application. The groove structure 14 only needs to be formed on the deformable portion 15 and be able to change the stiffness of the deformable portion 15.

[0048] In one embodiment, reference is made to Figure 5 As shown, the groove structure 14 includes a first groove structure 141 and a second groove structure 142, which are respectively disposed at both ends of the slot 13 along the circumference of the first housing 1.

[0049] Specifically, the slot 13 includes a first slot wall 131 and a second slot wall 132 arranged circumferentially opposite to each other along the receiving cavity 11. The first slot structure 141 is arranged close to the first slot wall 131 of the slot 13, and the second slot structure 142 is arranged close to the second slot wall 132 of the slot 13. This is equivalent to the first slot structure 141 and the second slot structure 142 being arranged close to the two ends of the deformable part 15, which is more conducive to the deformable part 15 generating radial expansion after being squeezed by the insertion end 21.

[0050] In one embodiment, reference is made to Figure 5 and Figure 6 As shown, the snap-fit ​​portion 22 includes a first snap-fit ​​end 221 and a second snap-fit ​​end 222 distributed at its two circumferential ends, and a first groove structure 141 and a second groove structure 142 are formed on the inner wall of the deformable portion 15.

[0051] When the insertion end 21 of the second housing 2 is inserted into the receiving cavity 11 via the mounting port 12, the first locking end 221 passes through the first groove structure 141 without interference and is held in the groove 13 near the first groove wall 131. That is, the position of the first groove structure 141 is set so that the first locking end 221 does not contact the inner wall of the deformable part 15. The first groove structure 141 avoids the first locking end 221, thus preventing the first locking end 221 from scraping against the inner wall of the deformable part 15 and causing debris to enter the receiving cavity 11.

[0052] Similarly, the second locking end 222 passes through the second groove structure 142 without interference and is locked in the groove 13 at a position close to the second groove wall 132. That is, the position of the second groove structure 142 is set so that the second locking end 222 does not come into contact with the inner wall of the deformable part 15.

[0053] It should be understood that the number and position of the groove structures 14 described above are merely illustrative examples and do not constitute a limitation on the embodiments of this application. In addition to the above examples, the number of groove structures 14 may also be set to one, three or more, as long as the stiffness of the deformable part 15 is reduced.

[0054] In one embodiment, reference is made to Figure 5 As shown, a guide surface 121 is formed at the mounting port 12, and the guide surface 121 is a beveled surface. After the guide surface 121 is set, the inner diameter of the first housing 1 increases from the inside to the outside near the mounting port 12, which facilitates the snap-fit ​​part 22 to enter the receiving cavity 11 through the guide surface 121, thereby improving the assembly efficiency of the first housing 1 and the second housing 2.

[0055] In one embodiment, reference is made to Figure 5 As shown, the deformable part 15 includes a thick-walled section 151 located between the first groove structure 141 and the second groove structure 142. On a plane perpendicular to the opening direction of the mounting port 12, the two circumferential ends of the vertical projection of the thick-walled section 151 intersect the vertical projection of the guide surface 121. That is, the arc length (circumferential dimension) of the guide surface 121 is greater than the arc length of the thick-walled section 151, ensuring that the guide surface 121 has sufficient length to guide the latching part 22.

[0056] Furthermore, on a plane perpendicular to the opening direction of the mounting port 12, the two circumferential ends of the vertical projection of the slot 13 (i.e., the first slot wall 131 and the second slot wall 132) intersect with the vertical projection of the guide surface 121, which can further increase the arc length of the guide surface 121, making its arc length greater than that of the slot 13, and making it easier for the guide surface 121 to guide the snap-fit ​​part 22.

[0057] In one embodiment, reference is made to Figure 2 and Figure 6As shown, the second housing 2 includes a main body 23 and a boss 24 protruding from one end of the main body 23. The cross-sectional area of ​​the boss 24 is smaller than that of the main body 23. The main body 23 and the boss 24 form a stepped structure at the insertion end 21. When the boss 24 is inserted into the receiving cavity 11, so that the snap-fit ​​part 22 is engaged in the slot 13, the end face of the main body 23 abuts against the end face of the mounting port 12 to prevent the second housing 2 from continuing to move along the axial direction of the receiving cavity 11 under the action of external force.

[0058] In one embodiment, reference is made to Figure 1 and Figure 2 As shown, this application also provides a pipette, which includes the above-described pipette assembly structure, wherein a first housing 1 can be used to accommodate the digital wheel assembly 4, and a second housing 2 can serve as a stroke post. A window 16 is provided on the peripheral wall of the first housing 1, extending through to the groove wall of the slot 13 on the side away from the mounting port 12. A transparent element 3 covers the window 16, allowing the user to observe the numbers on the digital wheel assembly 4 through the transparent element 3. The transparent element 3 is made of a transparent material, including but not limited to glass, transparent plastic, and transparent film.

[0059] It should be understood that the uses of the first housing 1 and the second housing 2 described above are illustrative and do not constitute a limitation on the embodiments of this application. In addition to the above examples, the first housing 1 can also serve as a stroke post, and the second housing 2 can also be used to house the digital wheel assembly 4. Alternatively, the first housing 1 and the second housing 2 can also be used to house other functional components of the pipette. Alternatively, the first housing 1 and the second housing 2 can also be used directly as functional components of the pipette.

[0060] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pipette assembly structure characterized by comprising: include: A first housing (1) is formed on the first housing (1), a mounting port (12), a slot (13) and a deformation part (15) located between the mounting port (12) and the slot (13), and a groove structure (14) is provided on the deformation part (15). The second housing (2) includes a snap-fit ​​portion (22) that engages with the slot (13); During the process of the snap-fit ​​part (22) being snapped into the slot (13), the snap-fit ​​part (22) interferes with the deformable part (15) so that the deformable part (15) undergoes radial deformation.

2. The pipette assembly structure according to claim 1, wherein One side of the groove structure (14) extends through to the groove wall of the slot (13) near the mounting opening (12); and / or, The groove structure (14) extends through to the end face of the mounting port (12) on the other side.

3. The pipette assembly structure according to claim 1, wherein The groove structure (14) penetrates the deformed part (15) along its concave direction.

4. The pipette assembly structure according to claim 1, wherein The groove structure (14) includes a first groove structure (141) and a second groove structure (142), which are respectively disposed at both ends of the slot (13) along the circumference of the first housing (1).

5. The pipette assembly structure according to claim 4, wherein The snap-fit ​​portion (22) includes a first snap-fit ​​end (221) and a second snap-fit ​​end (222) distributed at both ends of its circumference. The first groove structure (141) and the second groove structure (142) are formed on the inner wall of the deformable portion (15). During the process of the latching part (22) being latched in the slot (13), the first latching end (221) passes through the first slot structure (141) without interference, and the second latching end (222) passes through the second slot structure (142) without interference.

6. The pipette assembly structure according to claim 1, wherein The mounting port (12) has a guide surface (121), and the snap-fit ​​part (22) is snapped into the slot (13) via the guide surface (121).

7. The pipette assembly structure according to claim 6, wherein The groove structure (14) includes a first groove structure (141) and a second groove structure (142), and the deformable part (15) includes a thick-walled section (151) located between the first groove structure (141) and the second groove structure (142). The arc length of the guide surface (121) is greater than the arc length of the thick-walled section (151).

8. The pipette assembly structure according to claim 6, wherein The arc length of the guide surface (121) is greater than the arc length of the slot (13).

9. A pipette, characterized in that The pipette assembly structure includes any one of claims 1 to 8, wherein a window (16) is provided on the peripheral wall of the first housing (1) or the second housing (2).

10. The pipette of claim 9, wherein, The window (16) is opened on the first housing (1) and extends through the groove wall of the slot (13) on the side away from the mounting port (12).

Images