Sampling head
By designing support arms, connecting blocks and card blocks in the sampling head, fixing the plug and capillary tube, the problem of the plug swing when the reagent is eroded and the sample flushing efficiency is improved.
Patent Information
- Application Number
- CN202420195180.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-01-26
AI Technical Summary
The plug of the existing sampling head will swing when the reagent is washed, making the samples in the capillary less likely to be washed out.
A sampling head is designed, adopting a structure such as support arms, connecting blocks and clamps. Through the cooperation of the wedge block and wedge groove, the plug is clamped on the connecting block by the elasticity of the clamp, thereby fixing the capillary and plugs to prevent swinging. .
It effectively prevents the plug and capillary swing when the reagent is washed, making the samples in the capillary more easily washed off.
Smart Images
Figure CN222461062U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of testing instruments, in particular to a sampling head. Background Art
[0002] The current sampler draws the sample through a capillary tube, which is fixed on a plug, and the plug is inserted into a support arm. For easy assembly, the plug and the corresponding sockets on the support arm are clearance-matched, and the plug is clamped on the support arm through a clamp block on the top of the plug.
[0003] After taking a sample with this sampler, insert the end of the sampler with the capillary into the reagent cup, and then swing the reagent cup to flush the capillary with the reagent in the reagent cup, so that the sample adsorbed in the capillary is flushed out and then mixed in the reagent. Since the plug and the support arm are clearance-matched, the plug and the capillary will swing with the flushing of the reagent in the reagent cup, so that the sample adsorbed in the capillary is not easily flushed out by the reagent. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a sampling head, which is used to solve the problem that the plug on the current sampling head will swing with the flushing of the reagent, resulting in the sample in the capillary not being easily flushed out by the reagent.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] A sampling head comprises a supporting arm, a connecting block fixedly arranged at one end of the supporting arm, and a sampling unit arranged on the connecting block, wherein the sampling unit comprises a plug with one end inserted through the connecting block and a capillary fixedly arranged at the other end of the plug, a clamping block is fixedly arranged at the end of the plug away from the capillary, a wedge block is arranged on one side of the plug, the small end of the wedge block faces the clamping block, a wedge groove for cooperating with the wedge block is arranged on the connecting block, the clamping block clamps the wedge block in the clamping groove by virtue of its elasticity, and the plug is clamped on the connecting block by virtue of the clamping block and the wedge block.
[0007] Furthermore, a socket is provided through the connecting block, the wedge-shaped groove is provided on the inner wall of the socket, the plug is inserted into the socket, the part of the plug inserted into the block is the first section, and the remaining part is the second section, the capillary is provided at the outer end of the second section, the width of the second section is greater than the width of the first section, the width of the block is greater than the width of the first section, both sides of the block are provided with elastic teeth, and the distance between the outer ends of the two teeth is greater than the width of the first section of the plug.
[0008] Furthermore, there are two wedge-shaped blocks, which are respectively arranged on two opposite side surfaces of the first section of the plug, and there are two wedge-shaped grooves correspondingly arranged in the jack.
[0009] Furthermore, the connection block is provided with a spacing groove at a position away from the capillary, and the spacing groove is communicated with the corresponding wedge-shaped groove.
[0010] Furthermore, a window is formed on the second section of the plug, and one end of the capillary tube close to the first section of the card block is connected to the window.
[0011] Furthermore, a portion of the block is located in the window, the portion of the block is located on a side of the window away from the capillary, and the portion of the block is in a wedge shape with the tip facing the capillary.
[0012] Furthermore, the inner hole of the capillary is a circular hole with a constant diameter, and the wall thickness of the capillary gradually increases from the outer end to the inner end along the axial direction thereof.
[0013] The positive effects of the utility model are:
[0014] The utility model is provided with a support arm and a plug, wherein a connection block is connected to the support arm, a capillary tube and a clamping block are connected to the plug, and a wedge block is provided on the side of the plug. When assembling, the plug is inserted into the jack on the connection block, and the wedge block enters into the wedge groove and is supported in the wedge groove. After the clamping block passes through the jack, it is clamped on the upper edge of the connection block by two clamping teeth thereon. Under the interaction between the wedge block and the wedge groove, a downward pulling force is applied to the plug by relying on the elasticity of the connection block material itself, so that the plug is clamped in the connection block, making the connection between the connection block and the plug more secure. When the reagent flushes the plug and the capillary tube, the capillary tube and the plug will not swing with the shaking of the reagent, so that the sample in the capillary tube is more easily flushed down. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional diagram of the utility model;
[0016] Figure 2 It is a side view of the utility model;
[0017] Figure 3 yes Figure 2 Cross-sectional view of the middle AA part;
[0018] Figure 4 yes Figure 1 Exploded diagram of
[0019] Figure 5 Schematic diagram of the appearance of the support arm and the connecting block;
[0020] Figure 6 yes Figure 5 Schematic diagram at the bottom;
[0021] Figure 7 yes Figure 5 Side view of
[0022] Figure 8 yes Figure 7 Cross-sectional view of the middle BB area;
[0023] Fig. 9 yes Figure 7 Cross-sectional view of the middle CC area;
[0024] Fig.10 yes Figure 7 It is a cross-sectional view of the DD part;
[0025] In the figure:
[0026] 1. Support arm; 2. Connecting block; 3. Plug; 4. Capillary; 5. Window; 6. Wedge block; 7. Wedge groove; 8. Card block; 9. Slot; 10. Jack; 11. Spacer groove; 12. Card teeth. DETAILED DESCRIPTION
[0027] Example 1
[0028] like Figures 1 to 10 As shown, a sampling head comprises a support arm 1, a connection block 2 fixedly arranged at the lower end of the support arm 1, and a sampling unit arranged on the connection block 2. The sampling unit comprises a plug 3 with an upper end inserted through the connection block 2 and a capillary 4 fixedly arranged at the lower end of the plug 3, a clamping block 8 is fixedly arranged at the upper end of the plug 3, wedge blocks 6 are fixedly arranged on both sides of the plug 3, and the small ends of the wedge blocks 6 are both facing upwards.
[0029] A rectangular jack 10 is vertically provided on the connection block 2, and the upper part of the plug 3 is inserted into the jack 10. The upper part of the plug 3 is the first section, and the lower part is the second section. The cross section of the first end is a rectangle corresponding to the jack 10. The capillary 4 is fixedly provided at the lower end of the second section, and the width of the second section is greater than the width of the first section. The width of the clamping block 8 is greater than the width of the first section. Both sides of the clamping block 8 are elastic clamping teeth 12, and the distance between the outer ends of the two clamping teeth 12 is greater than the width of the first section of the plug 3.
[0030] The connection block 2 is provided with wedge-shaped grooves 7 on two opposite inner walls in the jack 10, and the two wedge-shaped blocks 7 are respectively located in the corresponding wedge-shaped grooves 7. The clamping block 8 clamps the wedge-shaped block 6 in the wedge-shaped groove 7 by virtue of its elasticity, and the plug 3 is clamped on the connection block 2 by virtue of the clamping block 8 and the wedge-shaped block 6.
[0031] During production, the connection block 2 and the support arm 1 are integrally formed of medical polymer materials, and the capillary 4, the plug 3, the clamping block 8 and the wedge block 6 are integrally formed of medical polymer materials. During assembly, the plug 3 is inserted upward into the jack 10, and the two wedge blocks 6 enter the corresponding wedge grooves 7 and are supported in the wedge grooves 7. After the clamping block 8 passes through the jack 10, the two clamping teeth 12 are clamped on the upper edge of the connection block 2. Under the interaction between the wedge block 6 and the wedge groove 7, the elasticity of the material of the connection block 2 itself is relied on to apply a downward pulling force to the plug 3, so that the plug 3 is clamped in the connection block 2, making the connection between the connection block 2 and the plug 3 more secure.
[0032] When the reagent flushes the plug 2 and the capillary 4, the capillary 4 and the plug 2 will not swing with the shaking of the reagent, so that the sample in the capillary 4 is more easily flushed out.
[0033] The connection block 2 is provided with a spacing groove 11 at a position corresponding to the inner wedge-shaped groove 7 . The spacing groove 11 is located at the upper part of the connection block 2 , and the lower part of the spacing groove 11 is connected to the top of the inner wedge-shaped groove 7 .
[0034] Example 2
[0035] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that:
[0036] A window 5 is formed on the second section of the plug 3, and the top end of the capillary tube 4 is connected to the bottom of the window 5. The block 8 at the top of the window 5 is in the shape of a wedge with the tip pointing downward.
[0037] When the reagent is swung, the reagent collides with the top of the window 5, and the flow direction of the reagent is changed. After part of the reagent enters the capillary 4 downward, it flushes the inside of the capillary 4, thereby making it easier to flush out the sample inside the capillary 4.
[0038] The inner hole of the capillary tube 4 is a circular hole with a constant diameter, and the wall thickness of the capillary tube 4 gradually increases from the lower end to the upper end along the axial direction thereof.
[0039] The wall of the lower end of the capillary tube 4 is thin, so it is easier to align the lower end of the capillary tube 4 with the sample to be sampled, and it is also easier to make the lower end of the capillary tube 4 contact the sample, which is convenient for sampling.
[0040] The above-mentioned embodiments are described in detail and specifically, and express the preferred embodiments of the utility model. They are only used to illustrate the technical ideas and features of the utility model. The purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly, but they are not limited to the utility model. The patent scope of the utility model cannot be limited only by this embodiment. That is, all equivalent changes or modifications made to the spirit disclosed by the utility model, for researchers or technicians in this field, within the structure of the utility model, the local improvements within the system and the changes and transformations between subsystems are still within the patent scope of the utility model. At present, the technical solution of this application has been pilot-tested, that is, a small-scale experiment of the product before large-scale mass production; after the pilot test, a user survey was conducted in a small range, and the survey results showed that the user satisfaction was high; now we are preparing for the formal production of the product for industrialization, including intellectual property risk warning surveys.
Claims
1. A sampling head, characterized in that: The invention comprises a support arm (1), a connection block (2) fixedly arranged at one end of the support arm (1), and a sampling unit arranged on the connection block (2); the sampling unit comprises a plug (3) with one end inserted through the connection block (2) and a capillary (4) fixedly arranged at the other end of the plug (3); a clamping block (8) is fixedly arranged at the end of the plug (3) away from the capillary (4); a wedge block (6) is arranged on one side of the plug (3); the small end of the wedge block (6) faces the clamping block (8); a wedge groove (7) for cooperating with the wedge block (6) is arranged on the connection block (2); the clamping block (8) clamps the wedge block (6) in the clamping groove by virtue of its elasticity; and the plug (3) is clamped on the connection block (2) by virtue of the clamping block (8) and the wedge block (6).
2. A sampling head according to claim 1, characterized in that: The connection block (2) is provided with a plug hole (10) extending therethrough, the wedge-shaped groove (7) is provided on the inner wall of the plug hole (10), the plug (3) is inserted into the plug hole (10), the portion of the plug (3) inserted into the clamping block (8) is the first section, and the remaining portion is the second section, the capillary (4) is provided at the outer end of the second section, the width of the second section is greater than the width of the first section, the width of the clamping block (8) is greater than the width of the first section, both sides of the clamping block (8) are provided with elastic clamping teeth (12), and the distance between the outer ends of the two clamping teeth (12) is greater than the width of the first section of the plug (3).
3. A sampling head according to claim 2, characterized in that: There are two wedge blocks (6), which are respectively arranged on two opposite side surfaces of the first section of the plug (3), and there are two wedge grooves (7) correspondingly arranged in the plug hole (10).
4. A sampling head according to claim 3, characterized in that: The connection block (2) is provided with a spacing groove (11) at a position away from the capillary tube (4), and the spacing groove (11) is communicated with the corresponding wedge-shaped groove (7).
5. A sampling head according to claim 2, characterized in that: A window (5) is formed on the second section of the plug (3), and one end of the capillary tube (4) close to the first section of the block (8) is connected to the window (5).
6. A sampling head according to claim 5, characterized in that: A portion of the block (8) is located in the window (5), and the portion of the block (8) is located on a side of the window (5) away from the capillary (4). The portion of the block (8) is in the shape of a wedge with the tip facing the capillary (4).
7. A sampling head according to claim 1, characterized in that: The inner hole of the capillary tube (4) is a circular hole with a constant diameter, and the wall thickness of the capillary tube (4) gradually increases from the outer end to the inner end along its axial direction.