Single-channel opening and closing cover module

Abstract

The utility model discloses a single pass opening and closing cover module, including casing, opening and closing cover motor, batch head connecting sleeve rod, batch head and needle withdrawing rod, the first motor pivot is axially reciprocatingly covered in the first motor pivot of needle withdrawing rod top end can along opening and closing cover motor, and the first motor pivot is circumferentially located to needle withdrawing rod, the casing is axially located to needle withdrawing rod, needle withdrawing rod part is arranged in batch head connecting sleeve rod and is circumferentially located with batch head connecting sleeve rod, opening and closing cover motor is fixed in casing, opening and closing cover motor is driven connection through batch head connecting sleeve rod with batch head connecting sleeve rod, batch head connecting sleeve rod from casing bottom end stretches out casing outside, batch head is connected to the bottom of batch head connecting sleeve rod, needle withdrawing rod bottom end stretches out from batch head bottom, opening and closing cover motor is connected with an internal circuit, a single pass opening and closing cover module of the utility model can realize the opening and closing cover of single pass cryopreserved tube.

Description

Technical Field

[0001] This utility model belongs to the technical field of opening and closing cover equipment, and in particular relates to a single-channel opening and closing cover module. Background Technology

[0002] Existing fully automatic cryovial opening and closing machines all have a multi-channel structure for simultaneous opening and closing of cryovials. During operation, a whole box of cryovials conforming to SBS specifications is placed in the box for opening and closing. More advanced machines, in order to adapt to various specifications of cryovials, detect the height of cryovials, and monitor whether cryovials have been opened and closed normally, are generally larger and heavier than those on the market.

[0003] Some users can only choose to manually open and close the tubes when they only need to open and close a small number of consumables, or purchase a complete machine that is compatible with 96 consumables. However, existing fully automatic cryopreservation tube opening and closing machines generally have a large footprint, high cost, complex structure, high maintenance costs, and currently do not offer more flexible options for low throughput. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a single-channel opening and closing cap module, which can realize the opening and closing of the cap of a single-channel cryopreservation tube.

[0005] To achieve the above objectives, this utility model provides a single-channel opening and closing cover module, including a housing, an opening and closing cover motor, a bit connecting sleeve, a bit, and a needle retraction rod; the top end of the needle retraction rod is reciprocally mounted on the first motor shaft of the opening and closing cover motor; the first motor shaft circumferentially limits the needle retraction rod; the housing axially limits the needle retraction rod; a portion of the needle retraction rod passes through the bit connecting sleeve and is circumferentially limited by the bit connecting sleeve; the opening and closing cover motor is fixed inside the housing; the opening and closing cover motor is drivenly connected to the bit connecting sleeve through the needle retraction rod; the bit connecting sleeve extends out of the housing from the bottom end; the bit is connected to the bottom end of the bit connecting sleeve; the bottom end of the needle retraction rod extends out from the bottom end of the bit; the opening and closing cover motor is connected to an internal circuit.

[0006] As one embodiment, it also includes a needle withdrawal mechanism; the needle withdrawal mechanism includes a needle withdrawal motor, the needle withdrawal rod, and a needle withdrawal rod transmission mechanism; the needle withdrawal motor is fixed inside the housing and is connected to the needle withdrawal rod via the needle withdrawal rod transmission mechanism.

[0007] In one embodiment, the upper part of the needle ejector bar extends outward to form a boss, and the housing limits the boss.

[0008] In one embodiment, the needle retraction lever transmission mechanism includes a pressing lever; the middle part of the pressing lever is pivotally connected to the housing; the first end of the pressing lever is drivenly connected to the needle retraction motor; the second end of the pressing lever forms a pressing part, which is disposed above the boss; when the needle is retracted, the needle retraction motor drives the pressing part to press the boss down to a needle retraction position.

[0009] In one embodiment, the needle retraction lever transmission mechanism further includes a lifting block; the second motor shaft of the needle retraction motor is a lead screw, and the lifting block is screwed to the outside of the second motor shaft; the lifting block is connected to the first end of the pressing rod.

[0010] In one embodiment, the first end of the pressing rod is recessed in the middle and forms a first mounting groove through it in the vertical direction; a sliding groove is formed on each of the two side walls of the first end of the pressing rod; the lifting block is disposed in the first mounting groove and a sliding rod is connected to each of its two sides, the sliding rods are respectively inserted into the corresponding sliding grooves, and a limiting part is formed or connected to the end of the sliding rod.

[0011] In one embodiment, the second end of the pressing rod is recessed in the middle and extends vertically to form a second mounting groove; the needle retraction rod passes through the second mounting groove; the two side walls of the first end of the pressing rod form the pressing part.

[0012] As one implementation, a consumable height detection mechanism is also included; the consumable height detection mechanism includes a magnet and a Hall sensor; the magnet is provided on the needle retraction rod and / or the lifting block; the Hall sensor is installed in the housing next to the magnet and connected to the internal circuit.

[0013] In one embodiment, when two magnets are included, one magnet is fixed to the boss and the other magnet is fixed to the outer end of the lifting block.

[0014] As one implementation, it also includes an anti-slip detection mechanism; the anti-slip detection mechanism includes a plurality of infrared sensors, the infrared sensors are fixed to the housing and positioned facing downwards from the bit, and the infrared sensors are connected to the internal circuit.

[0015] In one embodiment, several detachable connection structures are formed on one side of the housing.

[0016] In one embodiment, the detachable connection structure includes a plurality of positioning holes, and a locking hole is provided on at least one side of the positioning holes, the locking hole communicating with the interior of the positioning holes.

[0017] In one embodiment, at least one electrical connector is also connected to the housing on one side of the detachable connection structure; the electrical connector is connected to the internal circuit.

[0018] In one embodiment, a quick-release structure is formed between the bit connecting sleeve and the bit, the quick-release structure including at least one positioning shaft, at least one positioning groove, and an elastic limiting mechanism; the positioning shaft is vertically connected to the lower outer wall of the bit connecting sleeve and is arranged circumferentially along the bit connecting sleeve, the bit forming the positioning groove circumferentially to cooperate with the positioning shaft; one end of the positioning groove extends to the top of the bit and is open; or the positioning shaft is vertically connected to the upper inner wall of the bit and is arranged circumferentially along the bit. The bit connecting sleeve is arranged such that a positioning groove is formed circumferentially at the lower part of the bit connecting sleeve, which mates with the positioning shaft. One end of the positioning groove extends to the bottom end of the bit connecting sleeve and is open. The positioning shafts are respectively inserted into the corresponding positioning grooves. The bit connecting sleeve limits the bit circumferentially through the positioning shafts and the positioning grooves. The elastic limiting mechanism is connected to the bit connecting sleeve and presses the bit away from the bit connecting sleeve. The elastic limiting mechanism, in conjunction with the positioning shafts, limits the bit axially.

[0019] In one embodiment, the elastic limiting mechanism includes a clamping sleeve and an elastic element; the clamping sleeve is sleeved outside the bit connecting sleeve and disposed between the positioning shaft and the top end of the bit connecting sleeve; the elastic element is pressed between the end of the clamping sleeve away from the positioning shaft and the bit connecting sleeve.

[0020] The beneficial technical effects of this utility model due to the adoption of the above technical solution include:

[0021] The cap-opening / closing motor, bit connecting sleeve, and bit work together to enable single-channel cap opening and closing when the single-channel cap-opening / closing module is installed on the transmission arm of an existing multi-directional pipetting device. The needle retraction mechanism separates the cap or consumable from the bit. The lifting block engages with the lead screw of the second motor shaft, enabling the needle retraction motor to vertically lift the lifting block, which in turn drives the pressing rod. When needle retraction is needed, the pressing part pushes the protrusion to the retraction position, causing the retraction rod to extend from the bottom of the bit and separate the cap or consumable from the bit. The first mounting slot accommodates the lifting block. The sliding groove ensures circumferential transmission of the pressing rod while providing leeway for the movement of the first end of the pressing rod. The second mounting slot accommodates the retraction rod. The consumable height detection mechanism detects the height specifications of the cap-opening / closing consumable. The combination of a magnet and a Hall effect sensor allows for detection of the cap-opening / closing consumable height based on the position of the retraction rod or lifting block. The anti-lift detection mechanism is used to detect whether consumables are being lifted. When the bit is detachably connected to the bottom end of the bit connecting sleeve, it allows for convenient bit replacement, thus adapting to various test tube consumables on the market. Several detachable connection structures are formed on one side of the housing, allowing the single-channel opening and closing cap module to be easily connected to existing pipetting equipment. The use of an electrical connector allows for convenient and detachable electrical connection between the internal circuitry and the pipetting equipment circuitry. The use of a quick-release structure allows for convenient bit replacement, thus adapting to various test tube consumables on the market. The cooperation between the positioning shaft and the positioning slot achieves circumferential limiting of the bit and the bit connecting sleeve; the cooperation between the positioning shaft and the elastic limiting mechanism achieves axial limiting of the bit. One end of the positioning slot is open, allowing the positioning shaft to slide into the positioning slot from the opening at the top of the bit during bit installation, and to slide out through the opening during bit removal. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an external view of the single-channel opening and closing cover module in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the internal structure of the single-channel opening and closing cover module in an embodiment of this application;

[0025] Figure 3 This is a partially enlarged view of the internal structure of the single-channel opening and closing cover module in the embodiments of this application.

[0026] Figure 4This is a perspective view of the internal structure of the single-channel opening and closing cover module in the embodiments of this application;

[0027] Figure 5 This is a partial cross-sectional view of the single-channel opening and closing cover module in an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the connection structure between the bit connecting sleeve and the bit in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the connection structure between the bit connecting sleeve and the clamping sleeve in an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the bit structure in an embodiment of this application.

[0031] Explanation of icon numbers:

[0032] 1-Shell;

[0033] 2-Opening and closing cover motor;

[0034] 3-Bit connecting sleeve;

[0035] 4-Bits;

[0036] 5-Needle removal mechanism;

[0037] 51-Needle retraction motor; 52-Needle retraction lever; 53-Press lever; 54-Lifting block;

[0038] 521 - Boss; 531 - Pressing part; 532 - First mounting groove; 533 - Slide groove; 534 - Second mounting groove; 541 - Limiting part;

[0039] 6-Magnet;

[0040] 7-Hall sensor;

[0041] 8-Infrared sensor;

[0042] 9-Positioning hole;

[0043] 10 - Electrical connector;

[0044] 11- Quick loading and unloading structure;

[0045] 111-Positioning shaft; 112-Positioning slot; 113-Pressure sleeve; 114-Elastic element. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0047] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "linking," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] Example 1

[0050] Please see Figures 1 to 8 According to Embodiment 1 of this utility model, a single-channel opening and closing cover module includes a housing 1, an opening and closing cover motor 2, a bit connecting sleeve 3, a bit 4, and a needle retraction rod 52. The top end of the needle retraction rod 52 is reciprocally mounted on the first motor shaft of the opening and closing cover motor 2, and the first motor shaft circumferentially limits the needle retraction rod 52. The housing 1 axially limits the needle retraction rod 52. The needle retraction rod 52 is partially inserted into the bit connecting sleeve 3 and circumferentially limited by the bit connecting sleeve 3. The opening and closing cover motor 2 is fixed inside the housing 1. The opening and closing cover motor 2 is connected to the bit connecting sleeve 3 via the needle retraction rod 52. The bit connecting sleeve 3 extends out of the housing 1 from the bottom end. The bit 4 is connected to the bottom end of the bit connecting sleeve 3. The bottom end of the needle retraction rod 52 extends out from the bottom end of the bit 4. The opening and closing cover motor 2 is connected to an internal circuit.

[0051] In this embodiment, the bit 4 is connected to the bottom end of the bit connecting sleeve 3 in a non-detachable conventional manner. In other embodiments, the bit 4 may also be detachably connected to the bottom end of the bit connecting sleeve 3; detachable connection of the bit 4 to the bottom end of the bit connecting sleeve 3 allows for convenient replacement of the bit 4, thereby adapting to various test tube consumables on the market.

[0052] The cap opening / closing motor 2, the needle retraction rod 52, the bit connecting sleeve 3, and the bit 4 work together to enable the opening and closing of single-channel cryopreservation tubes when the single-channel cap opening / closing module is installed on the transmission arm of an existing multi-directional transmission device. Furthermore, when the needle retraction rod 52 is driven axially by external force or an external drive device, it can be driven downwards when needle retraction is required, causing it to extend further from the bottom of the bit and detach the cap or consumable attached to the bit 4.

[0053] A single-channel opening and closing cap module according to an embodiment of this utility model is mainly used for single-channel opening and closing caps of cryopreservation tubes.

[0054] Example 2

[0055] The single-channel opening and closing cover module of Embodiment 2 of this utility model has a structure that is basically the same as that of Embodiment 1. The difference is that it also includes a needle retraction mechanism 5. The needle retraction mechanism 5 includes a needle retraction motor 51, a needle retraction rod 52 and a needle retraction rod transmission mechanism. The needle retraction motor 51 is fixed in the housing 1 and is connected to the needle retraction rod 52 through the needle retraction rod transmission mechanism.

[0056] The needle removal mechanism 5 is used to separate and detach the cap or consumable from the bit 4.

[0057] In this embodiment, the upper part of the needle ejection rod 52 extends outward to form a boss 521, and the housing 1 limits the boss 521. In other embodiments, the boss 521 may not be provided, and other existing axial limiting structures may be adopted.

[0058] In this embodiment, the needle retraction lever transmission mechanism includes a pressing lever 53; the middle part of the pressing lever 53 is pivotally connected to the housing 1; the first end of the pressing lever 53 is connected to the needle retraction motor 51; the second end of the pressing lever 53 forms a pressing part 531, which is disposed above the boss 521; when retracting the needle, the needle retraction motor 51 drives the pressing part 531 to press the boss 521 down to a needle retraction position.

[0059] The first end of the pressing rod 53 is connected to the needle retraction motor 51 for transmission, so that the needle retraction motor 51 can drive the pressing rod 53. When needle retraction is required, the transmission pressing part 531 presses down the boss 521 to the needle retraction position, so that the needle retraction rod 52 extends from the bottom end of the bit 4 and separates the cap or consumable attached to the bit 4 from the bit 4.

[0060] Example 3

[0061] The single-channel opening and closing cover module of Embodiment 3 of this utility model has a structure that is basically the same as that of Embodiment 2. The difference is that the needle retraction rod transmission mechanism further includes a lifting block 54; the second motor shaft of the needle retraction motor 51 is a lead screw, and the lifting block 54 is screwed to the outside of the second motor shaft; the lifting block 54 is connected to the first end of the pressing rod 53.

[0062] The lifting block 54 cooperates with the lead screw of the second motor shaft to realize the vertical lifting transmission of the lifting block 54 by the needle retraction motor 51, which in turn transmits the pressing rod 53. When needle retraction is required, the pressing part 531 presses down the boss 521 to the needle retraction position, so that the needle retraction rod 52 extends from the bottom end of the bit 4 and separates the cap or consumable attached to the bit 4 from the bit 4.

[0063] The first end of the pressing rod 53 is recessed in the middle and extends vertically to form a first mounting groove 532; a sliding groove 533 is formed on each of the two side walls of the first end of the pressing rod 53; the lifting block 54 is disposed in the first mounting groove 532 and a sliding rod is connected to each of its two sides, the sliding rods are respectively inserted into the corresponding sliding grooves 533, and a limiting part 541 is formed or connected to the end of the sliding rod.

[0064] The first mounting groove 532 is used to accommodate the lifting block 54. The slide groove 533 provides a margin for the movement trajectory of the first end of the pressing rod 53 while ensuring the circumferential transmission of the pressing rod 53.

[0065] The second end of the pressing rod 53 is recessed in the middle and extends vertically to form a second mounting groove 534; the needle retraction rod 52 passes through the second mounting groove 534; the two side walls of the first end of the pressing rod 53 form the pressing part 531. The second mounting groove 534 is used to accommodate the needle retraction rod 52.

[0066] Example 4

[0067] The single-channel opening and closing cover module of Embodiment 4 of this utility model has a structure that is basically the same as that of Embodiment 3, except that it also includes a consumable height detection mechanism; the consumable height detection mechanism includes a magnet 6 and a Hall sensor 7; the magnet 6 is provided on the needle retraction rod 52 and / or the lifting block 54; the Hall sensor 7 is installed in the housing 1 next to the magnet 6 and connected to the internal circuit.

[0068] In this embodiment, two magnets 6 are included. One magnet 6 is fixed to the boss 521, and the other magnet 6 is fixed to the outer end of the lifting block 54. In other embodiments, the number and position of other magnets 6 can also be set according to actual needs.

[0069] The consumable height detection mechanism is used to detect the height specifications of consumables with open and closed caps. The cooperation between magnet 6 and Hall effect sensor 7 enables the detection of the height of consumables with open and closed caps based on the position of needle retraction rod 52 or lifting block 54.

[0070] Example 5

[0071] The single-channel opening and closing cover module of Embodiment 5 of this utility model has a structure that is basically the same as that of Embodiment 4. The difference is that it also includes an anti-slip detection mechanism. The anti-slip detection mechanism includes several infrared sensors 8. The infrared sensors 8 are fixed to the housing 1 and are arranged facing the lower part of the bit 4. The infrared sensors 8 are connected to the internal circuit.

[0072] The anti-lift detection agency is used to detect whether consumables are being lifted.

[0073] Example 6

[0074] The single-channel opening and closing cover module of Embodiment Six of this utility model has a structure that is basically the same as that of Embodiment Five. The difference is that several detachable connection structures are formed on one side of the housing 1.

[0075] Several detachable connection structures are formed on one side of the housing 1, which allows the single-channel opening and closing cap module to be easily connected to existing pipetting equipment.

[0076] In this embodiment, the detachable connection structure includes a plurality of positioning holes 9, and locking holes are respectively provided on both sides of the positioning holes 9, the locking holes communicating with the interior of the positioning holes 9. In other embodiments, other existing detachable connection structures may also be used.

[0077] In this embodiment, the use of positioning hole 9 and locking hole allows the single-channel opening and closing cap module to be used as a functional module in conjunction with an existing connecting module. The single-channel opening and closing cap module can be quickly installed and removed from the connecting module via positioning hole 9 and locking hole, and can be connected to an existing pipetting device rack via the connecting module. In other embodiments, other existing detachable connection structures can also be used for convenient connection to an existing pipetting device rack.

[0078] Example 7

[0079] The single-channel opening and closing cover module of Embodiment 7 of this utility model has a structure that is basically the same as that of Embodiment 6. The difference is that at least one electrical connector 10 is also connected to the housing 1 on one side of the detachable connection structure; the electrical connector 10 is connected to the internal circuit.

[0080] In this embodiment, the electrical connector 10 uses a pogopin assembly. In other embodiments, other existing electrical connectors 10 may also be used.

[0081] The use of electrical connector 10 enables a convenient and detachable electrical connection between the internal circuitry and the pipetting equipment circuitry.

[0082] Example 8

[0083] The single-channel opening and closing cover module of Embodiment 8 of this utility model has a structure that is basically the same as that of Embodiment 6. The difference is that a quick-release structure 11 is formed between the bit connecting sleeve 3 and the bit 4. The quick-release structure 11 includes at least one positioning shaft 111, at least one positioning groove 112, and an elastic limiting mechanism. The positioning shaft 111 is vertically connected to the lower outer wall of the bit connecting sleeve 3 and is arranged circumferentially along the bit connecting sleeve 3. The bit 4 forms the positioning groove 112 circumferentially to cooperate with the positioning shaft 111. One end of the positioning groove 112 extends to the top of the bit 4 and is open; or the positioning shaft 111 is vertically connected to the bit. The upper inner wall of the bit 4 is arranged along the circumference of the bit 4. The lower part of the bit connecting sleeve 3 forms a positioning groove 112 that cooperates with the positioning shaft 111 along the circumference. One end of the positioning groove 112 extends to the bottom end of the bit connecting sleeve 3 and is open. The positioning shaft 111 is respectively inserted into the corresponding positioning groove 112. The bit connecting sleeve 3 limits the bit 4 circumferentially through the positioning shaft 111 and the positioning groove 112. The elastic limiting mechanism is connected to the bit connecting sleeve 3 and presses the bit 4 away from the bit connecting sleeve 3. The elastic limiting mechanism cooperates with the positioning shaft 111 to limit the bit 4 axially.

[0084] In this embodiment, the elastic limiting mechanism includes a clamping sleeve 113 and an elastic element 114; the clamping sleeve 113 is sleeved on the outside of the bit connecting sleeve 3 and is disposed between the positioning shaft 111 and the top end of the bit connecting sleeve 3; the elastic element 114 is pressed between the end of the clamping sleeve 113 away from the positioning shaft 111 and the bit connecting sleeve 3.

[0085] In this embodiment, the elastic element 114 is a spring. In other embodiments, the elastic element 114 may also be other existing elastic elements.

[0086] The quick-release structure 11 enables convenient replacement of the bit 4, thus adapting it to various test tube consumables on the market. The cooperation between the positioning shaft 111 and the positioning slot 112 achieves circumferential limiting of the bit 4 and the bit connecting sleeve 3; the cooperation between the positioning shaft 111 and the elastic limiting mechanism achieves axial limiting of the bit 4. The positioning slot 112 is open at one end, allowing the positioning shaft 111 to slide into the positioning slot 112 from the opening at the top of the bit 4 when installing the bit 4, and the positioning shaft 111 to slide out through the opening when removing the bit 4.

[0087] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A single-channel opening and closing cover module, characterized in that, The device includes a housing (1), a cover-opening / closing motor (2), a batch head connecting sleeve (3), a batch head (4), and a needle retraction rod (52). The top end of the needle retraction rod (52) is axially reciprocating along the first motor shaft of the cover-opening / closing motor (2), and the first motor shaft circumferentially limits the needle retraction rod (52). The housing (1) axially limits the needle retraction rod (52). The needle retraction rod (52) is partially inserted into the batch head connecting sleeve (3) and connected to the batch head (4). The head connecting sleeve (3) is circumferentially limited; the opening and closing cover motor (2) is fixed inside the housing (1); the opening and closing cover motor (2) is connected to the bit connecting sleeve (3) through the needle retraction rod (52); the bit connecting sleeve (3) extends out of the housing (1) from the bottom end; the bit (4) is connected to the bottom end of the bit connecting sleeve (3); the bottom end of the needle retraction rod (52) extends out from the bottom end of the bit (4); the opening and closing cover motor (2) is connected to an internal circuit.

2. The single-channel opening and closing cover module according to claim 1, characterized in that, It also includes a needle removal mechanism (5); the needle removal mechanism (5) includes a needle removal motor (51), the needle removal rod (52) and a needle removal rod transmission mechanism; the needle removal motor (51) is fixed inside the housing (1) and is connected to the needle removal rod (52) through the needle removal rod transmission mechanism.

3. The single-channel opening and closing cover module according to claim 2, characterized in that, The upper part of the needle ejector bar (52) extends outward to form a boss (521), and the housing (1) limits the boss (521).

4. The single-channel opening and closing cover module according to claim 3, characterized in that, The needle retraction lever transmission mechanism includes a pressing lever (53); the middle part of the pressing lever (53) is pivotally connected to the housing (1); the first end of the pressing lever (53) is connected to the needle retraction motor (51); the second end of the pressing lever (53) forms a pressing part (531), which is disposed above the boss (521); when the needle is retracted, the needle retraction motor (51) drives the pressing part (531) to press the boss (521) down to a needle retraction position.

5. The single-channel opening and closing cover module according to claim 4, characterized in that, The needle ejection rod transmission mechanism also includes a lifting block (54); the second motor shaft of the needle ejection motor (51) is a lead screw, and the lifting block (54) is screwed to the outside of the second motor shaft; the lifting block (54) is connected to the first end of the pressing rod (53).

6. The single-channel opening and closing cover module according to claim 5, characterized in that, The first end of the pressing rod (53) is recessed in the middle and extends vertically to form a first mounting groove (532); a sliding groove (533) is formed on each of the two side walls of the first end of the pressing rod (53); the lifting block (54) is disposed in the first mounting groove (532) and a sliding rod is connected to each of its two sides, the sliding rods are respectively inserted into the corresponding sliding grooves (533), and a limiting part (541) is formed or connected to the end of the sliding rod.

7. The single-channel opening and closing cover module according to claim 4, characterized in that, The second end of the pressing rod (53) is recessed in the middle and extends vertically to form a second mounting groove (534); the needle retraction rod (52) passes through the second mounting groove (534); the two side walls of the first end of the pressing rod (53) form the pressing part (531).

8. The single-channel opening and closing cover module according to claim 5, characterized in that, It also includes a consumable height detection mechanism; the consumable height detection mechanism includes a magnet (6) and a Hall sensor (7); the magnet (6) is provided on the needle retraction rod (52) and / or the lifting block (54); the Hall sensor (7) is installed in the housing (1) next to the magnet (6) and connected to the internal circuit.

9. The single-channel opening and closing cover module according to claim 8, characterized in that, When two magnets (6) are included, one magnet (6) is fixed to the boss (521), and the other magnet (6) is fixed to the outer end of the lifting block (54).

10. The single-channel opening and closing cover module according to claim 1, characterized in that, It also includes a sling-off detection mechanism; the sling-off detection mechanism includes several infrared sensors (8), the infrared sensors (8) are fixed to the housing (1) and are positioned below the bit (4), and the infrared sensors (8) are connected to the internal circuit.

11. The single-channel opening and closing cover module according to any one of claims 1 to 10, characterized in that, Several detachable connection structures are formed on one side of the housing (1).

12. The single-channel opening and closing cover module according to claim 11, characterized in that, The detachable connection structure includes a plurality of positioning holes (9), and a locking hole is provided on at least one side of the positioning hole (9), and the locking hole communicates with the interior of the positioning hole (9).

13. The single-channel opening and closing cover module according to claim 11, characterized in that, At least one electrical connector (10) is also connected to the housing (1) on one side of the detachable connection structure; the electrical connector (10) is connected to the internal circuit.

14. The single-channel opening and closing cover module according to any one of claims 1 to 10, characterized in that, A quick-release structure (11) is formed between the bit connecting sleeve (3) and the bit (4). The quick-release structure (11) includes at least one positioning shaft (111), at least one positioning slot (112), and an elastic limiting mechanism. The positioning shaft (111) is vertically connected to the lower outer wall of the bit connecting sleeve (3) and is arranged circumferentially along the bit connecting sleeve (3). The bit (4) forms the positioning slot (112) circumferentially to cooperate with the positioning shaft (111). One end of the positioning slot (112) extends to the top of the bit (4) and is open. Alternatively, the positioning shaft (111) is vertically connected to the upper inner wall of the bit (4) and is arranged circumferentially along the bit (4). The lower part of the bit connecting sleeve (3) forms a positioning groove (112) that cooperates with the positioning shaft (111) along the circumferential direction. One end of the positioning groove (112) extends to the bottom end of the bit connecting sleeve (3) and is open. The positioning shaft (111) is respectively inserted into the corresponding positioning groove (112). The bit connecting sleeve (3) limits the bit (4) circumferentially through the positioning shaft (111) and the positioning groove (112). The elastic limiting mechanism is connected to the bit connecting sleeve (3) and presses the bit (4) away from the bit connecting sleeve (3). The elastic limiting mechanism cooperates with the positioning shaft (111) to limit the bit (4) axially.

15. The single-channel opening and closing cover module according to claim 14, characterized in that, The elastic limiting mechanism includes a clamping sleeve (113) and an elastic element (114); the clamping sleeve (113) is sleeved on the outside of the bit connecting sleeve (3) and is located between the positioning shaft (111) and the top end of the bit connecting sleeve (3); the elastic element (114) is pressed between the end of the clamping sleeve (113) away from the positioning shaft (111) and the bit connecting sleeve (3).

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