Multi-channel suction head withdrawing mechanism

Abstract

The utility model discloses a multi-channel suction head withdrawing mechanism which comprises a support, a suction head withdrawing plate, a suction head fixing plate and a suction head withdrawing mechanism body. A plurality of suction needles are fixedly installed on the suction head fixing plate, rod inserting pieces in one-to-one correspondence with the suction needles are installed on the suction head withdrawing plate, inserting grooves matched with the rod inserting pieces are formed in the suction head fixing plate, and under the action of the suction head withdrawing mechanism, the rod inserting pieces can be inserted into the inserting grooves and push down suction heads on the suction needles; according to the multi-channel pipetting device, a plurality of suction needles can be installed, the function of multi-channel pipetting is achieved, in addition, the suction heads on the suction needles can be synchronously pushed down, efficiency is improved, the suction heads can be retained by starting the suction head withdrawing mechanism after the push rods corresponding to the suction heads needing to be retained are pressed down according to the requirements of customers, and therefore the diversified requirements of the customers are met.

Description

Technical Field

[0001] The utility model relates to the field of liquid transfer equipment, in particular to a multi-channel suction head ejection mechanism. Background Art

[0002] In hospitals and medical testing institutions, sample extraction and sampling are essential, and the sampling workload is particularly high, requiring high accuracy and repeatability. Most procedures rely on manual labor combined with semi-automatic devices, while tasks such as sample and reagent pretreatment and extraction product separation are all performed manually by the operator. To improve efficiency, pipetting mechanisms typically utilize multiple pipette tips simultaneously. After pipetting, the operator must manually remove the tips one by one, which is quite cumbersome. Therefore, a mechanism capable of simultaneously removing multiple tips is needed. Utility Model Content

[0003] The utility model provides a multi-channel suction head ejection mechanism, which can solve at least one problem pointed out in the background technology.

[0004] A multi-channel tip ejection mechanism, comprising a bracket, a tip ejection plate, a tip fixing plate, and a tip ejection mechanism;

[0005] Among them, a plurality of suction needles are fixedly installed on the suction head fixing plate, and an insertion rod corresponding to the plurality of suction needles is installed on the suction head withdrawal plate. A slot that cooperates with the insertion rod is opened on the suction head fixing plate. Under the action of the suction head withdrawal mechanism, the insertion rod can be inserted into the slot and push the suction head on the suction needle down.

[0006] The suction head ejection mechanism includes a screw and a slider. The slider is installed on the screw, and the screw is rotatably set on the bracket. The slider is connected to the suction head fixing plate through a guide rail. A motor for driving the screw to rotate is also installed on the bracket. When the screw rotates, the suction head fixing plate moves toward or away from the suction head ejection plate.

[0007] The insertion rod member includes an insertion rod and a base. The suction head ejection plate is provided with a groove for accommodating the base. A through groove is provided in the groove for cooperating with the insertion rod. A spring 1 is provided in the groove, and the spring 1 abuts against the lower edge of the base.

[0008] A fixing mechanism for fixing the base is also provided in the suction head ejection plate.

[0009] The fixing mechanism includes a push rod, a first limiting portion, and a first connecting rod connecting the push rod and the first limiting portion. A receiving groove for accommodating the fixing mechanism is provided in the suction head ejection plate, and a second spring connected to the connecting rod is provided in the receiving groove.

[0010] One end of the push rod extends out of the suction head retraction plate, and one end of the limiting part 1 extends into the groove under the action of the spring 2.

[0011] The fixing mechanism further includes a second limiting portion and a second connecting rod. A third spring connected to the second connecting rod is provided in the receiving groove. One end of the second limiting portion can extend into the groove under the action of the third spring.

[0012] Preferably, an inclined sliding block 1 is installed on the connecting rod 2, and the push rod is connected to an inclined sliding block 2 that cooperates with the inclined sliding block 1. Pushing the push rod can retract the limiting part 1 and the limiting part 2 into the accommodating groove.

[0013] Preferably, a guide groove is fixedly mounted on the slider, and a guide rail cooperating with the guide groove is fixedly mounted on the frame.

[0014] Compared with the existing technology, the beneficial effects of the present invention are: the present invention can install multiple suction needles to realize the function of multi-channel pipetting. In addition, the suction heads on multiple suction needles can be pushed down synchronously to improve efficiency. According to customer needs, after pressing the push rod corresponding to the suction head to be retained, the suction head retraction mechanism can be activated to retain the suction head, thereby meeting the diverse needs of customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the fixed block of the utility model;

[0017] Figure 3 This is a schematic structural diagram of the suction head ejection plate of the present invention;

[0018] Figure 4 This is a cross-sectional view of the suction head ejection plate of the present invention;

[0019] Figure 5 It is a structural schematic diagram of the fixing mechanism of the present utility model.

[0020] Description of reference numerals:

[0021] 1-bracket, 2-head withdrawal plate, 3-head fixing plate, 4-suction needle, 5-insertion rod, 6-screw rod, 7-slider, 8-fixed block, 9-insertion rod, 10-base, 11-groove, 12-through groove, 13-spring 1, 14-push rod, 15-limiting part 1, 16-connecting rod 1, 17-spring 2, 18-limiting part 2, 19-connecting rod 2, 20-spring 3, 21-oblique slider 1, 22-oblique slider 2, 23-guide rail, 24-guide groove. DETAILED DESCRIPTION

[0022] A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0023] Example 1

[0024] like Figures 1 to 2 As shown, a multi-channel tip ejection mechanism provided by an embodiment of the present invention includes a bracket 1, a tip ejection plate 2, a tip fixing plate 3 and a tip ejection mechanism;

[0025] Among them, a plurality of suction pins 4 are fixedly mounted on the suction head fixing plate 3, and an insertion rod 5 corresponding to the plurality of suction pins 4 is mounted on the suction head ejection plate 2. A slot for matching the insertion rod 5 is provided on the suction head fixing plate 3. Under the action of the suction head ejection mechanism, the insertion rod 5 can be inserted into the slot and push the suction head on the suction pin 4 down;

[0026] The tip ejection mechanism includes a screw 6 and a slider 7. The slider 7 is mounted on the screw 6, which is rotatably mounted on the bracket 1. The slider 7 is connected to the tip fixing plate 3 via a guide rail 23. The bracket is also equipped with a motor for driving the screw 6 to rotate. When the screw 6 rotates, the tip fixing plate 3 moves toward or away from the tip ejection plate 2.

[0027] In addition, a guide groove 24 is fixedly mounted on the slider 7, and a guide rail 23 that cooperates with the guide groove 24 is fixedly mounted on the frame. The cooperation between the guide rail 23 and the guide groove 24 is used to limit the slider 7 to only be able to move up and down;

[0028] The suction needle 4 is fixed to the suction head fixing plate 3 through a fixing block 8. Specifically, the suction head fixing plate 3 is provided with a fixing groove that cooperates with the fixing block 8. The fixing block 8 is fixed in the fixing groove by screws / bolts. The fixing block 8 and the fixing groove are both provided with a semicircular groove that cooperates with the upper half of the suction needle 4. The lower half of the suction needle 4 is thicker than the upper half. In addition, a slot for the insertion rod 5 to cooperate is provided in the fixing groove and the fixing block 8. Therefore, the insertion rod 5 will contact the suction head after being inserted into the slot;

[0029] Example 2

[0030] like Figures 1 to 5 As shown, the embodiment of the present invention provides a multi-channel tip ejection mechanism. Based on the first embodiment, the insertion rod member 5 includes an insertion rod 9 and a base 10. The tip ejection plate 2 is provided with a groove 11 for accommodating the base 10. The groove 11 is provided with a through slot 12 that cooperates with the insertion rod 9. A spring 13 is provided in the groove 11, and the spring 13 abuts against the lower edge of the base 10.

[0031] A fixing mechanism for fixing the base 10 is also provided in the suction head ejection plate 2;

[0032] The fixing mechanism includes a push rod 14, a limiting portion 15, and a connecting rod 16 connecting the push rod 14 and the limiting portion 15. A receiving groove for accommodating the fixing mechanism is provided in the head ejection plate 2, and a second spring 17 connected to the connecting rod is provided in the receiving groove; one end of the push rod 14 extends outside the head ejection plate 2, and one end of the limiting portion 15 extends into the groove 11 under the action of the second spring 17; the fixing mechanism also includes a second limiting portion 18 and a second connecting rod 19. A third spring 20 connected to the second connecting rod 19 is provided in the receiving groove, and one end of the limiting portion 18 can extend into the groove 11 under the action of the third spring 20;

[0033] An inclined slider 1 21 is installed on the connecting rod 2 19, and the push rod 14 is connected to an inclined slider 2 22 that cooperates with the inclined slider 1 21. Pushing the push rod 14 can make the limiting part 15 and the limiting part 2 18 retract into the accommodating groove, and the inserting rod 5 will bounce upward under the action of the spring 13, so the inserting rod 5 will not be able to push the suction head down. Based on this, only part of the suction head can be pushed down according to the operator's needs, and the required suction heads can be retained, thereby meeting the diverse needs of customers.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0035] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A multi-channel suction head ejection mechanism, characterized in that: It includes a bracket, a suction head ejection plate, a suction head fixing plate and a suction head ejection mechanism; Among them, a plurality of suction needles are fixedly installed on the suction head fixing plate, and an insertion rod corresponding to the plurality of suction needles is installed on the suction head withdrawal plate. A slot that cooperates with the insertion rod is opened on the suction head fixing plate. Under the action of the suction head withdrawal mechanism, the insertion rod can be inserted into the slot and push the suction head on the suction needle down.

2. A multi-channel tip ejection mechanism according to claim 1, characterized in that: The suction head ejection mechanism includes a screw and a slider. The slider is installed on the screw, and the screw is rotatably set on the bracket. The slider is connected to the suction head fixing plate through a guide rail. A motor for driving the screw to rotate is also installed on the bracket. When the screw rotates, the suction head fixing plate moves toward or away from the suction head ejection plate.

3. The multi-channel tip ejection mechanism according to claim 1, wherein: The insertion rod member includes an insertion rod and a base. The suction head ejection plate is provided with a groove for accommodating the base. A through groove is provided in the groove for cooperating with the insertion rod. A spring 1 is provided in the groove, and the spring 1 abuts against the lower edge of the base. A fixing mechanism for fixing the base is also provided in the suction head ejection plate.

4. A multi-channel tip ejection mechanism according to claim 3, characterized in that: The fixing mechanism includes a push rod, a first limiting portion, and a first connecting rod connecting the push rod and the first limiting portion. A receiving groove for accommodating the fixing mechanism is provided in the suction head ejection plate, and a second spring connected to the connecting rod is provided in the receiving groove. One end of the push rod extends out of the suction head retraction plate, and one end of the limiting part 1 extends into the groove under the action of the spring 2.

5. The multi-channel tip ejection mechanism according to claim 4, characterized in that: The fixing mechanism further includes a second limiting portion and a second connecting rod. A third spring connected to the second connecting rod is provided in the receiving groove. One end of the second limiting portion can extend into the groove under the action of the third spring. The connecting rod 2 is provided with an inclined sliding block 1, and the push rod is connected with an inclined sliding block 2 which cooperates with the inclined sliding block 1. Pushing the push rod can retract the limiting part 1 and the limiting part 2 into the accommodating groove.

6. The multi-channel tip ejection mechanism according to claim 2, wherein: A guide groove is fixedly installed on the sliding block, and a guide rail matched with the guide groove is fixedly installed on the frame.

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