Sample adding device and sample adding instrument

Abstract

The utility model discloses a sample adding device and a sample adding instrument, the sample adding device comprises a batch sample adding assembly and an independent sample adding needle group, the batch sample adding assembly comprises a plurality of fixed sample adding needles which are arranged in parallel, and the independent sample adding needle group comprises at least one telescopic sample adding needle which is telescopically arranged relative to the fixed sample adding needles; when the independent sample adding needle group is in an independent sample adding mode, the telescopic sample adding needle extends out and exceeds all the fixed sample adding needles, so that independent sample adding is realized; when the batch sample adding assembly is in a batch sample adding mode, the telescopic sample adding needle retracts, all the fixed sample adding needles exceed the telescopic sample adding needle, and batch sample adding is achieved. The sample adding processes of the batch sample adding needle group and the independent sample adding needle group are mutually independent and do not interfere with each other, a plurality of sample adding tasks can be realized by virtue of the batch sample adding needle group, a small amount of sample adding and leakage point sample supplementing tasks can be realized by virtue of the independent sample adding needle group, manual participation is not needed in the sample adding process, the automation degree is relatively high, and the sample adding efficiency is high. And the sample adding efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of test instruments, in particular to a sample adding device and a sample adding instrument. Background Art

[0002] The sample dispenser is used to realize the automatic spotting of a large number of samples. Its rapid and automatic spotting greatly improves production efficiency and reduces personnel fatigue.

[0003] To improve sample loading efficiency, most existing samplers use multiple sample loading heads. Within one movement cycle, multiple sample collection and multiple target loading tasks can be completed simultaneously. This design can meet the needs of large-scale sample loading tasks, but it cannot complete tasks such as small amounts of samples or sample refilling. When a small number of samples need to be loaded or missed samples need to be refilled, because the sampler uses multiple sample loading heads, during the sampling and loading process, it is inevitable that non-target sample loading heads will not contact non-target samples and non-target loading positions, resulting in contamination of non-target samples and non-target loading positions. To solve this problem, existing technologies usually use manual removal of sample plates and manual loading, which greatly reduces the degree of automation of the sampler and affects the loading efficiency. Utility Model Content

[0004] The utility model aims to provide a sample adding device and a sample adding instrument, which solves the problem that the existing sample adding instrument cannot complete the task of adding a small amount of samples and filling the missing points, has a high degree of automation and high sample adding efficiency.

[0005] To achieve the above-mentioned object, the present invention provides a sample loading device, comprising a batch loading assembly and a separate loading needle group, wherein the batch loading assembly comprises a plurality of fixed loading needles arranged parallel to each other, and the separate loading needle group comprises at least one telescopic loading needle arranged to be telescopic relative to the fixed loading needle;

[0006] When the individual sample addition needle group is in the individual sample addition mode, the retractable sample addition needle extends out and exceeds all the fixed sample addition needles to achieve individual sample addition;

[0007] When the batch loading component is in the batch loading mode, the telescopic loading needle is retracted and all the fixed loading needles extend beyond the telescopic loading needle, thereby achieving batch loading.

[0008] Preferably, the batch sample loading assembly comprises a sample loading fixed seat having a guide groove, and the retractable sample loading needle is slidably arranged in the guide groove; and further comprises an elastic locking block retractably arranged on the sample loading fixed seat in a direction perpendicular to the guide groove;

[0009] When the individual sample addition needle group is in the sample addition mode, the elastic locking block switches to the locked state, the elastic locking block extends into the guide groove and abuts against the retractable sample addition needle, and the retractable sample addition needle remains in the extended state;

[0010] When the elastic lock block is switched to the unlocking state, the elastic lock block is retracted out of the guide groove, the elastic lock block is separated from the telescopic sample adding needle, and the telescopic sample adding needle is retracted into the sample adding fixing seat.

[0011] Preferably, a reset elastic member is arranged between the telescopic sample adding needle and the guide groove, and the reset elastic member is used to assist the telescopic sample adding needle to retract into the sample adding fixing seat when the elastic lock block is retracted out of the guide groove.

[0012] Preferably, the sample adding fixing seat is provided with a sliding groove, the sliding groove is communicated with the guide groove through a locking hole, the elastic lock block comprises a locking block slidably arranged in the sliding groove and a support plate fixedly arranged on the sample adding fixing seat, the locking block and the support plate are elastically connected, and the locking block is fixedly provided with a locking pin which is slidably arranged in the locking hole.

[0013] Preferably, the locking block comprises a sliding block matched with the sliding groove and a reset block integrally connected with the sliding block, the reset block is arranged on one side of the sample adding fixing seat, and the reset block is used to drive the locking pin to slide along the locking hole in a direction away from the guide groove.

[0014] Preferably, the support plate is fixedly provided with a guide pin, the guide pin is sleeved with a locking elastic member, the locking block is provided with a mounting groove for accommodating the locking elastic member, and the length of the guide pin is less than the depth of the mounting groove.

[0015] Preferably, the single sample adding needle group further comprises a stop needle cylinder arranged at one end of the telescopic sample adding needle, the stop needle cylinder is used to prevent the telescopic sample adding needle from separating from the guide groove, the stop needle cylinder further comprises an upper cap matched with the needle cylinder body, a buffer cavity is formed between the upper cap and the needle cylinder body, the telescopic sample adding needle is sleeved with a buffer elastic member, and the buffer elastic member is located in the buffer cavity; the buffer elastic member is used to provide a buffer for the telescopic sample adding needle when the telescopic sample adding needle is retracted into the buffer cavity.

[0016] Preferably, the telescopic sample adding needle is fixedly sleeved with a buffer stop ring, the buffer stop ring is used to prevent the telescopic sample adding needle from separating from the stop needle cylinder, and the telescopic sample adding needle is further sleeved with an isolation pad which is located between the buffer elastic member and the buffer stop ring.

[0017] Preferably, the utility model further comprises a guide limiting seat fixedly arranged on the sample adding fixing seat, the guide limiting seat is provided with a guide limiting hole, the guide limiting hole is used to guide the telescopic sample adding needle to be pushed out of the sample adding fixing seat by the extension push rod, and the hole of the guide limiting hole is provided with a limiting stop cover, the limiting stop cover is used to limit the telescopic sample adding needle from separating from the guide limiting hole when the telescopic sample adding needle is retracted into the sample adding fixing seat.

[0018] The utility model also provides a sample adding instrument, including above -mentioned sample adding device, still include extension push rod and retracting push rod, extension push rod is used to switch single sample adding needle group to single sample adding mode, retracting push rod is used to switch batch sample adding assembly to batch sample adding mode.

[0019] Relative to the background art, the utility model adds the single sample adding needle group to the sample adding device, and the batch sample adding needle group includes a plurality of mutually parallel fixed sample adding needles, and the single sample adding needle group includes at least one telescopic sample adding needle which is arranged telescopically relative to the fixed sample adding needle.

[0020] When the single sample adding needle group is in the single sample adding mode, the telescopic sample adding needle is extended and exceeds all the fixed sample adding needles, realizing single sample adding, and when the batch sample adding assembly is in the batch sample adding mode, the telescopic sample adding needle is retracted, and all the fixed sample adding needles exceed the telescopic sample adding needle, realizing batch sample adding.

[0021] The utility model batch sample adding needle group and single sample adding needle group two sample adding processes are independent of each other, and do not interfere with each other, can realize multiple sample adding tasks by the batch sample adding needle group, can realize a small amount of sample adding and sample adding task of leakage point by the single sample adding needle group, the sample adding process does not need manual participation, and the automation degree is higher, and the sample adding efficiency is higher.

[0022] The sample adding instrument provided by the utility model has the same beneficial effects as the sample adding device. ACCURACY OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the provided drawings without paying creative labor.

[0024] Figure 1 The isometric view of the sample adding device provided by the embodiments of the utility model;

[0025] Figure 2 The isometric view of the sample adding device provided by the embodiments of the utility model; Figure 1 The isometric view of the sample adding device provided by the embodiments of the utility model;

[0026] Figure 3 The isometric view of the sample adding device provided by the embodiments of the utility model; Figure 1 The isometric view of the sample adding device provided by the embodiments of the utility model;

[0027] Figure 4 The isometric view of the sample adding device provided by the embodiments of the utility model; The isometric view of the sample adding device provided by the embodiments of the utility model;

[0028] The isometric view of the sample adding device provided by the embodiments of the utility model; Figure 5 The isometric view of the sample adding device provided by the embodiments of the utility model; Figure 4 The isometric view of the sample adding device provided by the embodiments of the utility model; The isometric view of the sample adding device provided by the embodiments of the utility model;

[0029] The isometric view of the sample adding device provided by the embodiments of the utility model; Figure 6 The isometric view of the sample adding device provided by the embodiments of the utility model; The isometric view of the sample adding device provided by the embodiments of the utility model;

[0030] The isometric view of the sample adding device provided by the embodiments of the utility model; Figure 7 The isometric view of the sample adding device provided by the embodiments of the utility model;Figure 6 Side view of

[0031] Figure 8 for Figure 7 BB cross-sectional view;

[0032] Figure 9 for Figure 8 A cross-sectional view of the sample loading fixture;

[0033] Figure 10 for Figure 1 The structural diagram of the telescopic pipetting needle;

[0034] Figure 11 for Figure 10 CC sectional view;

[0035] Figure 12 for Figure 11 A partial enlarged view of middle D;

[0036] Figure 13 for Figure 10 Exploded diagram;

[0037] Figure 14 The figure shows the state when the locking pin and the neck of the telescopic sampling needle are in conflict.

[0038] The reference numerals are as follows:

[0039] Batch sample addition component 1, individual sample addition needle group 2, elastic locking block 3, reset elastic member 4, guide limit seat 5, extending push rod 6 and retracting push rod 7;

[0040] Fixed sample injection needle 11 and sample injection fixed seat 12

[0041] Guide groove 121, sliding groove 122 and locking hole 123;

[0042] Retractable sample injection needle 21, stopper syringe 22, buffer elastic member 23, buffer retaining ring 24 and isolation pad 25;

[0043] Syringe body 221, upper cap 222 and buffer chamber 223;

[0044] Abutment groove 2211 and annular baffle 2212;

[0045] Locking block 31, support plate 32, locking pin 33, guide pin 34 and locking elastic member 35;

[0046] Sliding block 311, reset block 312 and mounting slot 313;

[0047] Guide limiting hole 51 and limiting stop cover 52. DETAILED DESCRIPTION

[0048] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, and obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0050] In the text, the four directions of up, down, left and right are all based on the drawings Figure 1 The current view is used as a reference.

[0051] The embodiment of the present application discloses a sample adding device, which comprises a batch sample adding needle group 1 and a single sample adding needle group 2. The batch sample adding needle group 1 comprises a plurality of fixed sample adding needles 11, all the fixed sample adding needles 11 are arranged in parallel with each other, all the fixed sample adding needles 11 are arranged in a matrix and remain stationary during the sample adding process, and are used to complete a plurality of sample adding tasks.

[0052] The single sample adding needle group 2 comprises at least one telescopic sample adding needle 21, the telescopic sample adding needle 21 is parallel to all the fixed sample adding needles 11, and the telescopic sample adding needle 21 is arranged in a telescopic manner relative to the fixed sample adding needle 11. As a preferred embodiment, the single sample adding needle group 2 is provided with only one telescopic sample adding needle 21.

[0053] When the single sample adding needle group 2 is in a single sample adding mode, the telescopic sample adding needle 21 is extended and exceeds all the fixed sample adding needles 11, so as to realize single sample adding; when the batch sample adding assembly 1 is in a batch sample adding mode, the telescopic sample adding needle 21 is retracted, and all the fixed sample adding needles 11 exceed the telescopic sample adding needle 21, so as to realize batch sample adding.

[0054] The sample adding processes of the batch sample adding needle group 1 and the single sample adding needle group 2 are independent of each other and do not interfere with each other, can realize a plurality of sample adding tasks by relying on the batch sample adding needle group 1, can realize a small amount of sample adding and missing point sample supplementing tasks by relying on the single sample adding needle group 2, do not need manual participation in the sample adding process, have high automation degree, and have high sample adding efficiency.

[0055] The batch sample adding needle group 1 comprises a sample adding fixing base 122 with a guide groove 121, and all the sample adding needles 11 are fixed on the bottom of the sample adding fixing base 122 in parallel. The single sample adding needle group 2 is slidably arranged in the guide groove 121. As a preferred embodiment, the telescopic sample adding needle 21 is slidably arranged in the guide groove 121, and the guide groove 121 is slidably matched with the stopper needle cylinder 23 of the telescopic sample adding needle 21, which is used for guiding the telescopic sample adding needle 21 to slide out of the sample adding fixing base 122 along the vertical direction from top to bottom during sample adding, and is also used for guiding the telescopic sample adding needle 21 to slide into the sample adding fixing base 122 along the vertical direction from bottom to top after sample adding is completed.

[0056] The sample adding device further comprises an elastic lock block 3 which is telescopically arranged in the sample adding fixing base 12 in the direction perpendicular to the guide groove 121. The elastic lock block 3 automatically locks the telescopic sample adding needle 21 by using the elastic force, so that the telescopic sample adding needle 21 is stably kept at a specific position during sample adding, and the telescopic sample adding needle 21 is prevented from automatically retracting during sample adding, and the sample adding of the telescopic sample adding needle 21 is more reliable.

[0057] When the single sample adding needle group 2 is in the sample adding mode, the elastic lock block 3 is switched to the locking state, the elastic lock block 3 extends into the guide groove 121 and abuts against the telescopic sample adding needle 21, and the telescopic sample adding needle 21 is kept in the extended state.

[0058] When the elastic lock block 3 is switched to the unlocking state, the elastic lock block 3 retracts out of the guide groove 121, the elastic lock block 3 is separated from the telescopic sample adding needle 21, and the telescopic sample adding needle 21 retracts into the sample adding fixing base 12.

[0059] A reset elastic member 4 is arranged between the telescopic sample adding needle 21 and the guide groove 121, which is used for assisting the telescopic sample adding needle 21 to automatically reset after the elastic lock block 3 releases the lock of the telescopic sample adding needle 21, so that the sample adding of the telescopic sample adding needle 21 is more convenient. The reset elastic member 4 is specifically a cylindrical spring, but is not limited thereto.

[0060] As shown in FIGS. 1 to 3, the telescopic sample adding needle 21 is pushed along the guide groove 121 from top to bottom, the telescopic sample adding needle 21 compresses the reset elastic member 4, the telescopic sample adding needle 21 slides downward along the guide groove 121 relative to the sample adding fixing base 12 against the elastic force of the reset elastic member 4, until the telescopic sample adding needle 21 extends out of the sample adding fixing base 12 by a specific length, at this time, the telescopic sample adding needle 21 is extended in place; when the telescopic sample adding needle 21 extends out of the sample adding fixing base 12, there is a gap between the telescopic sample adding needle 21 and the elastic lock block 3 in the direction perpendicular to the guide groove 121, the elastic lock block 3 extends into the guide groove 121 from right to left by relying on the elastic force of itself and abuts against the telescopic sample adding needle 21, the elastic lock block 3 locks the telescopic sample adding needle 21, limits the movement of the telescopic sample adding needle 21 relative to the sample adding fixing base 12, and the telescopic sample adding needle 21 is kept in the extended state, which can complete the sample adding of a small amount of sample and the sample adding of a leakage point. Figure 4 5 As shown in FIGS. 1 to 3, the telescopic sample adding needle 21 is pushed along the guide groove 121 from top to bottom, the telescopic sample adding needle 21 compresses the reset elastic member 4, the telescopic sample adding needle 21 slides downward along the guide groove 121 relative to the sample adding fixing base 12 against the elastic force of the reset elastic member 4, until the telescopic sample adding needle 21 extends out of the sample adding fixing base 12 by a specific length, at this time, the telescopic sample adding needle 21 is extended in place; when the telescopic sample adding needle 21 extends out of the sample adding fixing base 12, there is a gap between the telescopic sample adding needle 21 and the elastic lock block 3 in the direction perpendicular to the guide groove 121, the elastic lock block 3 extends into the guide groove 121 from right to left by relying on the elastic force of itself and abuts against the telescopic sample adding needle 21, the elastic lock block 3 locks the telescopic sample adding needle 21, limits the movement of the telescopic sample adding needle 21 relative to the sample adding fixing base 12, and the telescopic sample adding needle 21 is kept in the extended state, which can complete the sample adding of a small amount of sample and the sample adding of a leakage point.​

[0061] As attached Figures 6 to 8 As shown, in the direction perpendicular to the guide groove 121, the elastic locking block 3 is pushed from left to right, and the elastic locking block 3 moves in the direction away from the guide groove 121 until the elastic locking block 3 is retracted to the outside of the guide groove 121, and the elastic locking block 3 is retracted away from the telescopic sample loading needle 21. The elastic locking block 3 unlocks the telescopic sample loading needle 21, and the reset elastic member 4 assists the telescopic sample loading needle 21 to retract into the sample loading fixed seat 12 by restoring the elastic deformation. The telescopic sample loading needle 21 is automatically retracted. When completing multiple sample sampling tasks, the telescopic sample loading needle 21 will not cause any impact.

[0062] The telescopic sample addition needle 21 in the present invention can be retracted and can realize self-locking when extended and retracted with the help of the elastic locking block 3. It can complete the sampling task of multiple samples, as well as the sampling of a small amount of samples and the sampling of leaked points without manual participation, with a high degree of automation and high sampling efficiency.

[0063] As attached Figure 2 and 3 As shown, the sample loading fixed seat 12 is provided with a sliding groove 122, the center line of which is perpendicular to the center line of the guide groove 121. The sliding groove 122 and the guide groove 121 are connected by a locking hole 123. The elastic locking block 3 includes a locking block 31 and a support plate 32. The locking block 31 is slidably arranged in the sliding groove 122. The support plate 32 is fixed to the sample loading fixed seat 12. The locking block 31 is elastically connected to the support plate 32. The support plate 32 and the locking block 31 provide support, so that the locking block 31 slides along the sliding groove 122 toward the guide groove 121 by elastic force. The locking block 31 is fixed with a locking pin 33. The locking pin 33 is slidably arranged in the locking hole 123. When the telescopic sample loading needle 21 is extended into place, the locking block 31 drives the locking pin 33 along the locking hole 123 into the guide groove 121 by elastic force to press against the telescopic sample loading needle 21, making the locking more reliable.

[0064] As attached Figure 3 As shown, the locking block 31 includes a sliding block 311 that cooperates with the sliding groove 122 and a reset block 312 that is integrally connected to the sliding block 311. The reset block 312 is used to drive the locking pin 33 to slide along the locking hole 123 in a direction away from the guide groove 121, that is, by pushing the reset block 312, the elastic locking block 3 is unlocked. The sliding groove 122 and the sliding block 311 can both adopt a dovetail structure to prevent the locking block 31 from detaching from the sample loading fixed seat 12. The reset block 312 is wider than the width of the sliding block 311. The reset block 312 is located on one side of the sample loading fixed seat 12, that is, the reset block 312 is located outside the sample loading fixed seat 12. The reset block 312 is triggered to unlock the elastic locking block 3, which facilitates the unlocking of the elastic locking block 3.

[0065] As attached Figure 2 and 3As shown, the support plate 32 is fixed with a guide pin 34, the guide pin 34 is sleeved with a locking elastic member 35, the locking elastic member 35 is installed in the installation slot 313 at the end away from the guide pin 34, the length of the guide pin 34 is less than the depth of the installation slot 313, so that a gap is left between the guide pin 34 and the installation slot 313, so that the locking elastic member 35 is guided to stretch and contract under the guide of the guide pin 34. The locking elastic member 35 is a cylindrical spring. In order to ensure that the locking block 31 is uniformly stressed, two locking pins 33 are fixed in parallel on the side of the support plate 32 facing the locking block 31, and each locking pin 33 is provided with a locking elastic member 35. Of course, the elastic connection between the locking block 31 and the support plate 32 is not limited to this.

[0066] When the telescopic sample adding needle 21 is extended out of the sample adding fixed seat 12, the locking elastic member 35 restores the elastic deformation, the locking elastic member 35 pushes the sliding block 311 of the locking block 31 to slide along the guide slot 121 towards the direction close to the guide slot 121, the sliding block 311 of the locking block 31 drives the locking pin 33 to insert into the guide slot 121 along the locking hole 123 by the elastic force, and the locking pin 33 abuts against the end of the telescopic sample adding needle 21, as shown in FIG. 5. Figure 5 As shown, the telescopic sample adding needle 21 is limited to slide along the guide slot 121, and the elastic locking block 3 is locked. It should be noted that a necked portion can also be provided on the telescopic sample adding needle 21, as shown in FIG. 6. Figure 14 As shown, the locking pin 33 inserted into the necked portion can also achieve the locking purpose.

[0067] When the reset block 312 of the locking block 31 is pushed away from the guide slot 121, the sliding block 311 of the locking block 31 slides away from the guide slot 121 along the sliding slot 122, and the locking elastic member 35 is pressed into the installation slot 313, the locking block 31 drives the locking pin 33 to slide out of the guide slot 121 along the locking hole 123 by overcoming the elastic force of the locking elastic member 35, and the locking is released, as shown in FIG. 7. Figure 8 As shown, the telescopic sample adding needle 21 can automatically slide and reset along the guide slot 121 under the action of the reset elastic member 4, until it is completely retracted into the sample adding fixed seat 12.

[0068] As shown in FIG. 8, the telescopic sample adding needle 21 is retracted into the sample adding fixed seat 12, and the elastic locking block 3 is locked. Figures 10 to 13As shown, the single-sample adding needle set 2 further comprises a stop needle cylinder 22 mounted at one end of the telescopic adding needle 21, which is used to prevent the telescopic adding needle 21 from being separated from the guide groove 121. The bottom of the guide groove 121 is provided with a needle hole for the telescopic adding needle 21 to pass through, and the stop needle cylinder 22 is in the form of a cylinder, with a diameter greater than the diameter of the needle hole. When the telescopic adding needle 21 is extended to the position along the needle hole, the stop needle cylinder 22 abuts against the groove bottom of the guide groove 121, preventing the telescopic adding needle 21 from being separated from the guide groove 121. It is also noted that the annular baffle 2312 is provided with a through hole for the telescopic adding needle 21 to pass through, and the needle hole and the through hole are coaxially through, so that the telescopic adding needle 21 passes through in sequence, forming double-hole positioning, making the telescopic adding needle 21 move more smoothly and stably, and ensuring accurate positioning of the telescopic adding needle 21.

[0069] As shown in the accompanying drawings, Figure 11 The stop needle cylinder 22 comprises a needle cylinder body 221, which is in the form of a cylinder, and an annular baffle 2212 is integrally formed on the inner wall of the needle cylinder body 221. The annular baffle 2212 is formed with an abutting groove 2211 below, and the reset elastic member 4 abuts between the abutting groove 2211 and the guide groove 121, so that the abutting groove 2211 guides the telescopic movement of the reset elastic member 4, avoiding the bending deformation of the reset elastic member 4 during the telescopic movement, which causes the telescopic adding needle 21 to be stuck in the guide groove 121, and ensuring the telescopic adding needle 21 to slide more smoothly.

[0070] The stop needle cylinder 22 further comprises an upper cap 222 matched with the needle cylinder body 221, and a buffer cavity 223 is formed between the upper cap 222 and the needle cylinder body 221. Specifically, one end of the upper cap 222 is closed, and the other end is provided with a connecting sleeve coaxial with the needle cylinder body 221 and fixed to the top of the needle cylinder body 221. An avoiding groove is formed in the connecting sleeve, and a stop groove is formed above the annular baffle 2212 of the needle cylinder body 221. The avoiding groove and the stop groove are opposite in opening and combined to form the buffer cavity 223.

[0071] The telescopic adding needle 21 is sleeved with a buffer elastic member 23, which is located in the buffer cavity 223. When the telescopic adding needle 21 collides with the sample box or the like during the adding process, the stop needle cylinder 22 is fixed by the elastic lock block 3, while the buffer cavity 223 is provided to make the telescopic adding needle 21 more inserted into the buffer cavity 223 at one end of the stop needle cylinder 22. When the telescopic adding needle 21 is retracted into the buffer cavity 223, the buffer elastic member 23 absorbs the impact vibration by compression, providing buffer for the telescopic adding needle 21, and avoiding the telescopic adding needle 21 from being bent.

[0072] As shown in the accompanying drawings, Figure 11 and 12As shown, the telescopic sample adding needle 21 is fixedly sleeved with a buffering stop ring 24, when the telescopic sample adding needle 21 completes buffering, the buffering elastic element 23 restores elastic deformation, the buffering elastic element 23 pushes the telescopic sample adding needle 21 to extend out of the stop needle cylinder 22, until the buffering stop ring 24 abuts against the annular baffle 2212, the buffering stop ring 24 is used for preventing the telescopic sample adding needle 21 from separating from the stop needle cylinder 22. The buffering stop ring 24 can be a circlip, but is not limited to this. The telescopic sample adding needle 21 is further sleeved with an isolation pad 25, the isolation pad 25 is located between the buffering elastic element 23 and the buffering stop ring 24, avoiding that the buffering elastic element 23 is clamped into the buffering stop ring 24 and causing the telescopic sample adding needle 21 to be stuck in the stop needle cylinder 22. The isolation pad 25 can be a ring-shaped gasket.

[0073] The sample adding device further comprises a guide limiting seat 5 fixedly arranged on the sample adding fixed seat 12, as shown in Figure 4 As shown, the guide limiting seat 5 has a guide limiting hole 51, as shown in Figure 5 As shown, the guide limiting hole 51 is coaxially and throughly arranged with the guide groove 121, the guide limiting hole 51 is used for inserting the extending push rod 6 to guide the extending push rod 6 to push the telescopic sample adding needle 21 to extend out of the sample adding fixed seat 12. The hole of the guide limiting hole 51 is provided with a limiting cover 52, when the telescopic sample adding needle 21 is retracted into the sample adding fixed seat 12, the limiting cover 52 is used for limiting the telescopic sample adding needle 21 from separating from the guide limiting hole 51.

[0074] As shown in Figure 5 And 8 As shown, the sample adding fixed seat 12 is fixedly arranged with a plurality of fixed sample adding needles 11, all the fixed sample adding needles 11 are parallel to the telescopic sample adding needle 21, and are used for completing a plurality of sample sampling tasks.

[0075] The working principle of the sample adding device is as follows:

[0076] The extension push rod 6 is inserted into the guide limiting hole 51 of the guide limiting seat 5, and the extension push rod 6 enters the guide groove 121 under the guidance of the guide limiting hole 51, the extension push rod 6 pushes the telescopic sample adding needle 21 along the guide groove 121 from top to bottom, the telescopic sample adding needle 21 compresses the reset elastic element 4, the telescopic sample adding needle 21 slides downwards along the guide groove 121 relative to the sample adding fixed seat 12 by overcoming the elastic force of the reset elastic element 4, and the telescopic sample adding needle 21 extends to a specific length outside the sample adding fixed seat 12, and at this time, the telescopic sample adding needle 21 is extended in place; when the telescopic sample adding needle 21 extends outside the sample adding fixed seat 12, the locking elastic element 35 of the elastic locking block 3 restores the elastic deformation, the locking elastic element 35 pushes the sliding block 311 of the locking block 31 to slide along the guide groove 121 in the direction close to the guide groove 121, the sliding block 311 of the locking block 31 drives the locking pin 33 to insert into the guide groove 121 along the locking hole 123 from right to left by relying on the elastic force, the locking pin 33 abuts against the end of the telescopic sample adding needle 21, the elastic locking block 3 locks the telescopic sample adding needle 21, the movement of the telescopic sample adding needle 21 relative to the sample adding fixed seat 12 is limited, and the telescopic sample adding needle 21 remains in the extended state, as shown in the accompanying drawings. Figure 5 The sample adding device can complete the tasks of adding a small amount of samples and supplementing samples at leakage points.

[0077] In the direction perpendicular to the guide groove 121, the reset block 312 of the locking block 31 is pushed from left to right by the retracting push rod 7, the sliding block 311 of the locking block 31 slides along the sliding groove 122 in the direction away from the guide groove 121, and the locking elastic element 35 is pressed into the mounting groove 313, the locking block 31 drives the locking pin 33 to slide out of the guide groove 121 along the locking hole 123 by overcoming the elastic force of the locking elastic element 35, the locking is released, the telescopic sample adding needle 21 can slide and reset along the guide groove 121 automatically under the action of the reset elastic element 4, until the telescopic sample adding needle 21 is completely retracted into the sample adding fixed seat 12, and the telescopic sample adding needle 21 realizes automatic retraction, as shown in the accompanying drawings. Figure 8 The sample adding device can complete the tasks of adding a small amount of samples and supplementing samples at leakage points.

[0078] The utility model discloses an embodiment further discloses a sample adding instrument, including above -mentioned sample adding device, still include extension push rod 6 and retracting push rod 7, as shown in the accompanying drawings. Figure 4 and 5 As shown in the accompanying drawings, the extension push rod 6 pushes the telescopic sample adding needle 21 to extend along the guide groove 121 to the sample adding fixed seat 12, so that the single sample adding needle group 2 is switched to the single sample adding mode, as shown in the accompanying drawings. Figure 6 As shown in the accompanying drawings, the retracting push rod 7 is used for pushing the elastic locking block 3 away from the telescopic sample adding needle 21, so that the batch sample adding assembly 1 is switched to the batch sample adding mode. The extension push rod 6 and the retracting push rod 7 can be driven by a movement mechanism, and the movement directions of the two are perpendicular. The technical scheme of the sample adding instrument provided by the utility model is same with the sample adding device, and has the same beneficial effects.

[0079] It should be noted that the relative terms, such as first and second, are used herein only to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between such entities.

[0080] The principles and implementation modes of the present application are described herein by using specific examples, and the above example descriptions are only used to help understand the method and core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A sample adding device, characterized in that: The invention comprises a batch sample addition component (1) and a separate sample addition needle group (2), wherein the batch sample addition component (1) comprises a plurality of fixed sample addition needles (11) arranged parallel to each other, and the separate sample addition needle group (2) comprises at least one telescopic sample addition needle (21) arranged telescopically relative to the fixed sample addition needle (11); When the individual sample addition needle group (2) is in the individual sample addition mode, the telescopic sample addition needle (21) extends out and exceeds all the fixed sample addition needles (11), thereby achieving individual sample addition; When the batch loading component (1) is in the batch loading mode, the telescopic loading needle (21) is retracted, and all the fixed loading needles (11) extend beyond the telescopic loading needle (21), thereby achieving batch loading.

2. The sample adding device according to claim 1, characterized in that The batch sample loading assembly (1) comprises a sample loading fixed seat (12) having a guide groove (121), wherein the retractable sample loading needle (21) is slidably arranged in the guide groove (121); and further comprises an elastic locking block (3) which is retractably arranged in a direction perpendicular to the guide groove (121) on the sample loading fixed seat (12); When the separate sample addition needle group (2) is in the sample addition mode, the elastic locking block (3) switches to a locked state, the elastic locking block (3) extends into the guide groove (121) and abuts against the telescopic sample addition needle (21), and the telescopic sample addition needle (21) remains in an extended state; When the elastic locking block (3) is switched to the unlocked state, the elastic locking block (3) is retracted out of the guide groove (121), the elastic locking block (3) is separated from the telescopic sample injection needle (21), and the telescopic sample injection needle (21) is retracted into the sample injection fixing seat (12).

3. The sample adding device according to claim 2, characterized in that A resetting elastic member (4) is provided between the telescopic sample loading needle (21) and the guide groove (121), and the resetting elastic member (4) is used to assist the telescopic sample loading needle (21) to retract into the sample loading fixed seat (12) when the elastic locking block (3) is retracted out of the guide groove (121).

4. The sample adding device according to claim 2, characterized in that The sample loading fixed seat (12) is provided with a sliding groove (122), and the sliding groove (122) is connected to the guide groove (121) through a locking hole (123); the elastic locking block (3) includes a locking block (31) slidably arranged in the sliding groove (122) and a support plate (32) fixed to the sample loading fixed seat (12), and the locking block (31) is elastically connected to the support plate (32); the locking block (31) is fixed with a locking pin (33), and the locking pin (33) is slidably arranged in the locking hole (123).

5. The sample adding device according to claim 4, characterized in that The locking block (31) includes a sliding block (311) that cooperates with the sliding groove (122) and a reset block (312) that is integrally connected to the sliding block (311). The reset block (312) is provided on one side of the sample loading fixed seat (12). The reset block (312) is used to drive the locking pin (33) to slide along the locking hole (123) in a direction away from the guide groove (121).

6. The sample adding device according to claim 5, characterized in that The support plate (32) is fixedly provided with a guide pin (34), the guide pin (34) is sleeved with a locking elastic member (35), the locking block (31) is provided with a mounting groove (313) for accommodating the locking elastic member (35), and the length of the guide pin (34) is less than the depth of the mounting groove (313).

7. The sample adding device according to claim 2, characterized in that The separate sample loading needle assembly (2) further comprises a stopper syringe (22) mounted on one end of the telescopic sample loading needle (21), the stopper syringe (22) being used to prevent the telescopic sample loading needle (21) from escaping from the guide groove (121); the stopper syringe (22) further comprises an upper cap (222) matched with the syringe body (221), a buffer cavity (223) being formed between the upper cap (222) and the syringe body (221), the telescopic sample loading needle (21) being provided with a buffer elastic member (23), the buffer elastic member (23) being located in the buffer cavity (223); the buffer elastic member (23) being used to provide a buffer for the telescopic sample loading needle (21) when the telescopic sample loading needle (21) is retracted into the buffer cavity (223).

8. The sample adding device according to claim 7, characterized in that: The telescopic sample injection needle (21) is fixedly sleeved with a buffer retaining ring (24), and the buffer retaining ring (24) is used to prevent the telescopic sample injection needle (21) from escaping from the stop syringe (22); the telescopic sample injection needle (21) is also sleeved with an isolation pad (25), and the isolation pad (25) is located between the buffer elastic member (23) and the buffer retaining ring (24).

9. The sample adding device according to claim 2, characterized in that: The invention also includes a guide limit seat (5) fixed to the sample loading fixed seat (12), wherein the guide limit seat (5) has a guide limit hole (51), and the guide limit hole (51) is used to guide the extended push rod (6) to push the telescopic sample loading needle (21) to extend out of the sample loading fixed seat (12); a limit stop cover (52) is provided along the hole edge of the guide limit hole (51), and the limit stop cover (52) is used to limit the telescopic sample loading needle (21) from leaving the guide limit hole (51) when the telescopic sample loading needle (21) is retracted into the sample loading fixed seat (12).

10. A sample adding instrument, characterized in that: The sample loading device comprises the sample loading device according to any one of claims 1 to 9, and further comprises an extending push rod (6) and a retracting push rod (7), wherein the extending push rod (6) is used to switch the individual sample loading needle group (2) to the individual sample loading mode, and the retracting push rod (7) is used to switch the batch sample loading component (1) to the batch sample loading mode.

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