Printing head mechanism and blood smear preparation instrument

Abstract

The utility model relates to the technical field of medical equipment, and discloses a printing head mechanism and a blood smear preparation instrument. The printing head mechanism comprises a supporting frame, a deflection assembly, a mounting plate, a printing head and two elastic assemblies. The deflection assembly comprises a deflection block, and the deflection block is rotationally connected to the supporting frame along a first rotating axis; the mounting plate is rotationally connected to the deflection block along a second rotating axis, and the first rotating axis is perpendicular to the second rotating axis; the two elastic assemblies are arranged on the two sides of the second rotating axis, each elastic assembly comprises an elastic piece, one end of each elastic piece abuts against the supporting frame, the other end of each elastic piece abuts against the side wall of the mounting plate, and the two elastic assemblies can drive the deflection block to deflect around the first rotating axis; the printing head is connected to the side, away from the elastic assembly, of the mounting plate. The printing head and the mounting plate can rotate around the deflection block along the second rotating axis, so that the forming effect is improved; a certain flexible activity amount exists between the printing head and the printing position of the printing head, and damage caused by hard contact between the printing head and the glass slide is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a print head mechanism and a blood smear preparation instrument. Background Art

[0002] At present, the main process of conventional blood smear preparation on the market is roughly as follows: slide loading, slide printing information code, blood sampling system draws sample blood, drop system drops blood onto the printed slide, slide blood smear (the drop-shaped blood is pushed into a blood film form by a blood pusher for subsequent staining and observation), slide drying, slide blood staining, staining and drying, etc. Among them, the personnel information corresponding to the sample to be tested and the information of the final blood test result need to correspond one by one, which requires the instrument to scan the information code of the sample tube (usually the sample tube is attached with a QR code or a one-dimensional code, and the QR code or the one-dimensional code records the personnel-related information of the sample to be tested), and the scanned relevant data is converted by the instrument into the form of a QR code or a one-dimensional code and then printed on the slide. The subsequent sample test information on the slide is recorded and transmitted through the QR code or the one-dimensional code.

[0003] Due to the characteristics of the glass slide, it is necessary to print a two-dimensional code or a one-dimensional code on it, which requires the use of a corresponding special printing device. The existing technology on the market is usually: printing through a thermal print head, and conventional thermal print heads are divided into right-angle print heads and bevel print heads. The heating point of the right-angle print head is perpendicular to the printing position; the heating point of the bevel print head has a certain swing angle with the printing position. Since the front printing point of the thermal print head is a ceramic heating point, when the glass slide is tilted relative to the printing point of the thermal print head, part of the front printing point is in hard contact with the glass slide, which is easy to be damaged by impact.

[0004] Based on this, there is an urgent need for a print head mechanism and a blood smear preparation instrument to solve the above-mentioned problems. Utility Model Content

[0005] Based on the above, the purpose of the utility model is to provide a print head mechanism and a blood smear preparation instrument, in which the print head and the mounting plate can rotate around the yaw block along the second rotation axis to adapt to the inclination angle of the slide and improve the molding effect; there is a certain amount of flexible activity between the print head and its printing position to prevent damage caused by hard contact between the print head and the slide.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In one aspect, a print head mechanism is provided, comprising:

[0008] Support frame;

[0009] A deflection assembly, comprising a deflection block, wherein the deflection block is rotatably connected to the support frame along a first rotation axis;

[0010] A mounting plate, rotatably connected to the deflection block along a second rotation axis, wherein the first rotation axis is perpendicular to the second rotation axis;

[0011] Two elastic components, the two elastic components are arranged on both sides of the second rotation axis, the elastic components include an elastic member, one end of the elastic member abuts against the support frame, and the other end abuts against the side wall of the mounting plate, and the two elastic components can drive the deflection block to deflect around the first rotation axis;

[0012] The print head is connected to a side of the mounting plate away from the elastic component.

[0013] As a preferred technical solution of the print head mechanism, the elastic component further includes an adjusting member, the first end of the adjusting member is provided with an external thread, the support frame is provided with a first threaded hole, and the first end of the adjusting member is threadedly connected to the first threaded hole;

[0014] The second end of the adjusting member is provided with a first mounting groove, the mounting plate is provided with a second mounting groove on a side facing the elastic component, one end of the elastic member is embedded in the first mounting groove, and the other end is embedded in the second mounting groove.

[0015] As a preferred technical solution of a print head mechanism, the elastic component further comprises a locking nut, and the locking nut is threadedly connected to one end of the adjusting member extending out of the first threaded hole.

[0016] As a preferred technical solution for a print head mechanism, the deflection assembly includes a first rotating shaft, and the deflection block is provided with a first connecting hole on one side along a first direction, the first direction is the extension direction of the second rotating axis, one end of the first rotating shaft is rotatably connected to the deflection block through the first connecting hole, and the other end of the first rotating shaft is connected to the mounting plate.

[0017] As a preferred technical solution for a print head mechanism, the deflection assembly includes a second rotating shaft, and the support frame is provided with second connecting holes on both sides along the second direction, and the second direction is the extension direction of the first rotation axis; the deflection block is provided with a third connecting hole extending along the second direction; the second rotating shaft is rotatably connected to the support frame through the second connecting hole, and the second rotating shaft is rotatably connected to the deflection block through the third connecting hole.

[0018] As a preferred technical solution for a print head mechanism, there are two second rotating shafts, the two second rotating shafts are respectively connected to the two ends of the deflection block through the third connecting holes, and an avoidance portion for avoiding the first rotating shaft is provided between the two second rotating shafts.

[0019] As a preferred technical solution for a print head mechanism, the side wall of the deflection block is provided with a groove, the bottom of the groove is provided with a waist-shaped hole connected to the third connecting hole, the side wall of the second rotating shaft is provided with a second threaded hole, a screw is passed through the waist-shaped hole and is threadedly connected to the second rotating shaft through the second threaded hole.

[0020] As a preferred technical solution for a print head mechanism, the print head mechanism also includes a limit screw, which is threadedly connected to the support frame and has an end abutting against the deflection block. The limit screw and the elastic member are located on both sides of the first rotation axis, and the elastic member can drive the deflection block to rotate around the first rotation axis and abut against the limit screw.

[0021] As a preferred technical solution of a print head mechanism, the print head mechanism also includes a drive shaft and a drive member, the drive shaft is located on a side of the deflection block away from the mounting plate, and the drive member is used to drive the support frame to rotate around the axis of the drive shaft.

[0022] On the other hand, a blood smear preparation instrument is provided, which includes the print head mechanism described in any of the above schemes.

[0023] The beneficial effects of the utility model are:

[0024] The utility model provides a print head mechanism and a blood smear preparation instrument. When the print head presses down a glass slide, if the glass slide is tilted relative to the print head, the print head and the mounting plate can rotate around a deflection block along a second rotation axis to adapt to the tilt angle of the glass slide and improve the molding effect; the print head continues to be pressed down, and the print head, the mounting plate and the deflection block can overcome the elastic force of the elastic member and deflect around the first rotation axis to meet the requirement that the heating point of the angled print head and the printing position have a certain swing angle. At this time, the printing surface of the print head is in a parallel state with the surface of the glass slide, ensuring that the printed ink or material can be evenly distributed on the glass slide, wherein the downward pressure of the print head is the elastic force of the two elastic members, completing the printing on the glass slide, ensuring that there is a certain amount of flexible activity between the print head and its printing position. On the one hand, even if the glass slide is slightly vibrated or uneven, the print head can adaptively adjust its position to maintain stable contact with the glass slide; on the other hand, the flexible activity helps prevent the print head from being damaged by hard contact with the glass slide. Since the contact between the print head and the glass slide is flexible, the risk of wear and damage between the two is reduced, which helps to extend the service life of the print head, reduce maintenance costs, and increase the service life of the print head. The structure is simple and the production cost is reduced. In this embodiment, the print head has the function of automatically adjusting according to the tilt angle of the glass slide through a mechanical structure, without the need for additional sensors or control systems, making the entire printing process simpler and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is one of the structural schematic diagrams of the print head mechanism provided by the specific embodiment of the utility model;

[0027] Figure 2 It is a schematic diagram of the print head provided by the specific embodiment of the utility model rotating around the first rotation axis;

[0028] Figure 3 This is one of the structural exploded diagrams of the print head mechanism provided in the specific implementation mode of the utility model;

[0029] Figure 4 This is the second structural explosion diagram of the print head mechanism provided in the specific implementation manner of the utility model.

[0030] The following are marked in the figure:

[0031] 1. Support frame; 11. Second connecting hole;

[0032] 2. deflection assembly; 21. deflection block; 211. waist-shaped hole; 212. third connecting hole; 213. first connecting hole; 22. first rotating shaft; 23. first bearing; 24. second rotating shaft; 25. second bearing;

[0033] 3. Mounting plate; 31. Second mounting slot;

[0034] 4. elastic component; 41. elastic member; 42. adjusting member; 421. first mounting groove; 43. anti-loosening nut;

[0035] 5. Print head; 6. Limit screw; 7. Drive shaft. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] At present, the main process of conventional blood smear preparation on the market is roughly as follows: slide loading, slide printing information code, blood sampling system draws sample blood, drop system drops blood onto the printed slide, slide blood smear (the drop-shaped blood is pushed into a blood film form by a blood pusher for subsequent staining and observation), slide drying, slide blood staining, staining and drying, etc. Among them, the personnel information corresponding to the sample to be tested and the information of the final blood test result need to correspond one by one, which requires the instrument to scan the information code of the sample tube (usually the sample tube is attached with a QR code or a one-dimensional code, and the QR code or the one-dimensional code records the personnel-related information of the sample to be tested), and the scanned relevant data is converted by the instrument into the form of a QR code or a one-dimensional code and then printed on the slide. The subsequent sample test information on the slide is recorded and transmitted through the QR code or the one-dimensional code.

[0041] Due to the characteristics of the glass slide, it is necessary to print a two-dimensional code or a one-dimensional code on it, which requires the use of a corresponding special printing device. The existing technology on the market is usually: printing through a thermal print head, and conventional thermal print heads are divided into right-angle print heads and bevel print heads. The heating point of the right-angle print head is perpendicular to the printing position; the heating point of the bevel print head has a certain swing angle with the printing position. Since the front printing point of the thermal print head is a ceramic heating point, when the glass slide is tilted relative to the printing point of the thermal print head, part of the front printing point is in hard contact with the glass slide, which is easy to be damaged by impact.

[0042] To solve the above problems, Figure 1-Figure 3 As shown, this embodiment provides a blood smear preparation instrument, including a print head mechanism, which includes a support frame 1, a deflection component 2, a mounting plate 3, a print head 5 and two elastic components 4.

[0043] Specifically, the deflection assembly 2 includes a deflection block 21, which is rotatably connected to the support frame 1 along a first rotation axis; the mounting plate 3 is rotatably connected to the deflection block 21 along a second rotation axis, and the first rotation axis is perpendicular to the second rotation axis; two elastic components 4 are arranged on both sides of the second rotation axis, and the elastic component 4 includes an elastic member 41, one end of the elastic member 41 abuts against the support frame 1, and the other end abuts against the side wall of the mounting plate 3, and the two elastic components 4 can drive the deflection block 21 to deflect around the first rotation axis; the print head 5 is connected to the side of the mounting plate 3 away from the elastic component 4. In this embodiment, the print head 5 can be an angled thermal print head.

[0044] When the print head 5 presses down the glass slide, if the glass slide is tilted relative to the print head 5, the print head 5 and the mounting plate 3 can rotate around the deflection block 21 along the second rotation axis to adapt to the tilt angle of the glass slide and improve the molding effect; continue to press down the print head 5, the print head 5, the mounting plate 3 and the deflection block 21 can overcome the elastic force of the elastic member 41 and deflect around the first rotation axis to meet the requirement that the heating point of the angled print head 5 and the printing position have a certain swing angle. At this time, the printing surface of the print head 5 is parallel to the surface of the glass slide, ensuring that the printed ink or material can be evenly distributed on the glass slide, wherein the downward pressure of the print head 5 is the elastic force of the two elastic members 41, completing the printing on the glass slide, ensuring that there is a certain amount of flexible activity between the print head 5 and its printing position. On the one hand, even if the glass slide is slightly vibrated or uneven, the print head 5 can also adaptively adjust its position to maintain stable contact with the glass slide; on the other hand, the flexible activity helps prevent the print head 5 from being damaged by hard contact with the glass slide. Since the contact between the print head 5 and the glass slide is flexible, the risk of wear and damage between the two is reduced, which helps to extend the service life of the print head 5, reduce maintenance costs, and increase the service life of the print head 5. The structure is simple and the production cost is reduced. In this embodiment, the print head 5 has the function of automatically adjusting according to the tilt angle of the glass slide through a mechanical structure, without the need for additional sensors or control systems, making the entire printing process simpler and more reliable.

[0045] In this embodiment, the elastic member 41 can be a spring, which plays a key role in the process of pressing down the print head 5. It not only provides the necessary downward pressure for the print head 5 to ensure that the ink or material can be fully transferred to the slide, but also provides elastic force when oblique angle printing is required, so that the print head 5 can swing smoothly.

[0046] In this embodiment, the support frame 1 is a sheet metal part with high strength, which can ensure the stability and durability of the support frame 1. Under the same load, the sheet metal part can maintain a small deformation, thereby maintaining the accuracy and reliability of the support frame 1. Furthermore, the processing accuracy of the sheet metal part is higher than that of the traditional mechanical processing technology, and the processed workpiece has high accuracy, stable size, and stable and reliable quality. This high-precision feature enables the support frame 1 to accurately meet the design requirements and improve the accuracy and performance of the overall structure.

[0047] Furthermore, if Figure 1-Figure 4 As shown, the elastic component 4 also includes an adjusting member 42, the first end of the adjusting member 42 is provided with an external thread, the support frame 1 is provided with a first threaded hole, and the first end of the adjusting member 42 is threadedly connected to the first threaded hole; the second end of the adjusting member 42 is provided with a first mounting groove 421, and the mounting plate 3 is provided with a second mounting groove 31 on the side facing the elastic component 4, and one end of the elastic member 41 is embedded in the first mounting groove 421, and the other end is embedded in the second mounting groove 31. When the elastic force of the print head 5 on both sides of the second rotation axis is inconsistent, the downward pressure of the print head 5 on both sides of the second rotation axis on the glass slide is inconsistent, which leads to inconsistent thickness of the printed lines on both sides. At this time, the two adjusting members 42 can be screwed to control the distance between the second end of the adjusting member 42 and the mounting plate 3, and the compression amount of the two elastic members 41 can be controlled, so as to adjust the downward pressure of the print head 5 on both sides of the second rotation axis, and ensure that the force on both sides of the second rotation axis of the print head 5 is relatively uniform and balanced when printing. Furthermore, in this embodiment, one end of the elastic member 41 is embedded in the first mounting groove 421, and the other end is embedded in the second mounting groove 31. On the one hand, the elastic member 41 can be quickly and accurately embedded in the predetermined position, reducing the adjustment time during the installation process and improving work efficiency; on the other hand, the precise size of the first mounting groove 421 and the second mounting groove 31 ensures the accurate matching between the elastic member 41 and the installation position, avoiding the offset or misalignment during the installation process, improving the structural stability, and effectively resisting the displacement or deformation caused by external force or vibration. It should be noted that the size of the first mounting groove 421 and the second mounting groove 31 can be adjusted and optimized according to specific needs to adapt to elastic members 41 of different sizes, shapes and materials.

[0048] After the first end of the adjusting member 42 is threadedly connected to the first threaded hole, in order to facilitate the relative position adjustment of the adjusting member 42 and the first threaded hole, the adjusting member 42 and the first threaded hole are not tightened, so the first end of the adjusting member 42 and the first threaded hole are easily loosened and displaced, and the reliability is poor. To solve the above problem, the elastic component 4 also includes a locking nut 43, which is threadedly connected to one end of the adjusting member 42 extending out of the first threaded hole. When the compression amount of the elastic member 41 needs to be adjusted, the operator first rotates the adjusting member 42 to move it relative to the support frame 1. During this process, the compression amount of the elastic member 41 will change accordingly. After adjusting the compression amount of the elastic member 41, the operator tightens the anti-loosening nut 43 on the end of the adjusting member 42 extending from the first threaded hole, and locks the anti-loosening nut 43. Therefore, the external thread of the adjusting member 42 and the internal thread of the first threaded hole are closely fitted along the extension direction of the first threaded hole to generate friction. The friction prevents the external thread of the adjusting member 42 and the internal thread of the first threaded hole from rotating relative to each other, so the position of the adjusting member 42 can be firmly locked. Conversely, when the compression amount of the elastic member 41 needs to be adjusted again, the anti-loosening nut 43 can be easily operated.

[0049] In this embodiment, the deflection assembly 2 includes a first rotating shaft 22, and a first connecting hole 213 is provided on one side of the deflection block 21 along a first direction, the first direction is the extension direction of the second rotation axis, one end of the first rotating shaft 22 is rotatably connected to the deflection block 21 through the first connecting hole 213, and the other end of the first rotating shaft 22 is connected to the mounting plate 3. Among them, the axis of the first rotating shaft 22 is colinear with the second rotation axis, and the first rotating shaft 22 can be rotatably connected to the first connecting hole 213 through the first bearing 23, which improves the rotation accuracy of the first rotating shaft 22 relative to the deflection block 21, reduces the wear between the first rotating shaft 22 and the deflection block 21, and improves the service life of the print head mechanism. The side of the mounting plate 3 facing the deflection block 21 can be connected to the end of the first rotating shaft 22 through a screw, which is simple to operate. The elastic component 4 is located above the mounting plate 3, and the print head 5 is installed below the mounting plate 3 through a screw, thereby ensuring that the print head 5 and the mounting plate 3 rotate relative to the deflection block 21 along the second rotation axis. Since the print head 5 is restricted by the two elastic components 4, it can be ensured that the print head 5 rotates within a small range around the second rotation axis, and an abnormal situation in which the horizontal left and right deflection differs greatly will not occur.

[0050] Furthermore, the deflection assembly 2 also includes a second rotating shaft 24, and the support frame 1 is provided with second connecting holes 11 on both sides along the second direction, and the second direction is the extension direction of the first rotation axis; the deflection block 21 is provided with a third connecting hole 212 extending along the second direction; the second rotating shaft 24 is rotatably connected to the support frame 1 through the second connecting hole 11, and the second rotating shaft 24 is rotatably connected to the deflection block 21 through the third connecting hole 212. Among them, the second rotating shaft 24 can be rotatably connected to the second connecting hole 11 through the second bearing 25, which improves the rotation accuracy of the second rotating shaft 24 relative to the support frame 1, reduces the wear between the second rotating shaft 24 and the support frame 1, and improves the service life of the print head mechanism, ensuring that the print head 5, the mounting plate 3 and the deflection block 21 rotate relative to the support frame 1 along the first rotation axis. In this embodiment, the first direction is X and the second direction is Y.

[0051] Preferably, there are two second rotating shafts 24, and the two second rotating shafts 24 are connected to the two ends of the deflection block 21 through the third connecting holes 212 respectively, and an escape portion for avoiding the first rotating shaft 22 is provided between the two second rotating shafts 24. The axis of the second rotating shaft 24 is colinear with the first rotation axis, and during assembly, one end of the first rotating shaft 22 extending into the first connecting hole 213 extends into the escape portion, so that the second rotating shaft 24 is prevented from interfering with the first rotating shaft 22, and the size of the deflection block 21 along the first direction is reduced, so that the deflection block 21 is more compact, and the integration and space utilization efficiency of the print head mechanism are improved.

[0052] In order to ensure the dimensional control between the print head mechanism and the second rotating shaft 24 along the second direction. Preferably, the side wall of the deflection block 21 is provided with a sink groove, and the bottom of the sink groove is provided with a waist-shaped hole 211 connected to the third connecting hole 212, and the side wall of the second rotating shaft 24 is provided with a second threaded hole, and the screw is passed through the waist-shaped hole 211 and is threadedly connected to the second rotating shaft 24 through the second threaded hole. During the assembly process, the end of the second rotating shaft 24 is first inserted into the second connecting hole 11 of the support frame 1. Then, the screw is passed through the waist-shaped hole 211 on the deflection block 21 and is threadedly connected with the second threaded hole on the second rotating shaft 24. Due to the presence of the waist-shaped hole 211, even if the second rotating shaft 24 has a slight deviation in position, the position of the screw in the waist-shaped hole 211 can be adjusted to ensure that the screw can be smoothly screwed into the second threaded hole. The design of the waist-shaped hole 211 allows a certain installation error of the second rotating shaft 24 in the second direction, which greatly improves the convenience and flexibility of assembly; by adjusting the position of the screw in the waist-shaped hole 211, it can be ensured that the screw can be smoothly screwed into the second threaded hole, avoiding abnormal situations such as jamming due to installation errors.

[0053] Preferably, if Figure 2 and Figure 3As shown, the print head mechanism also includes a limit screw 6, which is threadedly connected to the support frame 1 and has its end abutted against the deflection block 21. The limit screw 6 and the elastic member 41 are located on both sides of the first rotation axis. The elastic member 41 can drive the deflection block 21 to rotate around the first rotation axis and abut against the limit screw 6. In this embodiment, the deflection block 21 rotates along the first rotation axis relative to the support frame 1. During the printing process, under the interference of the glass slide, when the deflection block 21 and the print head 5 rotate counterclockwise to overcome the elastic force of the elastic member 41, the mounting plate 3 compresses the elastic component 4, and the elastic component 4 can limit the rotation of the mounting plate 3 to prevent the deflection block 21 from rotating too much counterclockwise; after printing is completed, the elastic component 4 drives the mounting plate 3 to reset, and the deflection block 21 rotates around the first rotation axis and abuts against the limit screw 6 to prevent the deflection block 21 from rotating too much clockwise. The limit screw 6 is located above the deflection block 21. By adjusting the screw-in length of the limit screw 6, the final angle of the overall up and down deflection of the print head 5 can be controlled, thereby realizing the angle control of the print head 5. This design makes the print head mechanism highly flexible and adaptable, and can be adjusted and optimized according to different printing requirements. In this embodiment, with the cooperation of the limit screw 6 and the elastic component 4, precise control of the angle of the print head 5 is achieved. During the printing process, the stability of the print head 5 is ensured; after printing is completed, it can be accurately reset to the initial position. In addition, by adjusting the screwing length of the limit screw 6, the deflection angle of the print head 5 can be flexibly adjusted to meet different printing requirements. This not only improves the printing quality, but also extends the service life of the equipment.

[0054] Furthermore, the print head mechanism further includes a drive shaft 7 and a drive member, wherein the drive shaft 7 is located on a side of the deflection block 21 away from the mounting plate 3, and the drive member is used to drive the support frame 1 to rotate around the axis of the drive shaft 7. By providing the drive shaft 7 and the drive member, the print head mechanism has a higher level of automation, reduces the need for manual intervention, and improves the efficiency and stability of printing.

[0055] In this embodiment, the driving member is a motor, and the driving shaft 7 extends along the second direction and is fixedly connected to the support frame 1. The motor drive is connected to the driving shaft 7 to control the rotation angle of the motor, thereby accurately controlling the rotation angle of the support frame 1 relative to the driving shaft 7. During the rotation and printing of the support frame 1, when the print head 5 hits the glass slide to be printed, the elastic component 4 cooperates with the two swingable angles along the first rotation axis and the second rotation axis to avoid the print head 5 from hard contact with the glass slide, thereby ensuring the safe use of the print head 5, and the print head 5 can print according to the preset path and angle, thereby improving the printing accuracy and efficiency.

[0056] In other embodiments, the driving member can also be a cylinder, the driving shaft 7 extends along the second direction and is rotatably connected to the support frame 1, the driving shaft 7 is fixed to the blood smear preparation instrument, the output end of the cylinder is drivably connected to the support frame 1, and the output end of the cylinder is located on the side of the driving shaft 7 away from the deflection block 21. During operation, when the output end of the cylinder is extended, the support frame 1 rotates around the driving shaft 7 so that the print head 5 presses down the glass slide for printing, and when the output end of the cylinder is retracted, the print head 5 moves in a direction away from the glass slide, and the support frame 1 rotates around the driving shaft 7 to reset. Cylinder drive is similar to motor drive, and cylinder drive can also achieve precise rotation of the support frame 1. When the print head 5 contacts the glass slide, the elastic component 4 can also play a role to avoid hard contact and protect the print head 5, and the print head 5 can deflect along the first rotation axis and the second rotation axis to ensure that the print head 5 is adaptively adjusted relative to the glass slide.

[0057] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A print head mechanism, characterized in that: include: Support frame; A deflection assembly, comprising a deflection block, wherein the deflection block is rotatably connected to the support frame along a first rotation axis; A mounting plate, rotatably connected to the deflection block along a second rotation axis, wherein the first rotation axis is perpendicular to the second rotation axis; Two elastic components, the two elastic components are arranged on both sides of the second rotation axis, the elastic components include an elastic member, one end of the elastic member abuts against the support frame, and the other end abuts against the side wall of the mounting plate, and the two elastic components can drive the deflection block to deflect around the first rotation axis; The print head is connected to a side of the mounting plate away from the elastic component.

2. The print head mechanism according to claim 1, characterized in that: The elastic component further comprises an adjusting member, a first end of the adjusting member is provided with an external thread, the support frame is provided with a first threaded hole, and the first end of the adjusting member is threadedly connected to the first threaded hole; The second end of the adjusting member is provided with a first mounting groove, the mounting plate is provided with a second mounting groove on a side facing the elastic component, one end of the elastic member is embedded in the first mounting groove, and the other end is embedded in the second mounting groove.

3. The print head mechanism according to claim 2, characterized in that: The elastic component further comprises a locking nut which is threadedly connected to an end of the adjusting member extending out of the first threaded hole.

4. The print head mechanism according to claim 1, characterized in that: The deflection assembly includes a first rotating shaft, and the deflection block is provided with a first connecting hole on one side along a first direction, the first direction is the extension direction of the second rotation axis, one end of the first rotating shaft is rotatably connected to the deflection block through the first connecting hole, and the other end of the first rotating shaft is connected to the mounting plate.

5. The print head mechanism according to claim 4, characterized in that: The yaw assembly includes a second rotating shaft, and the support frame is provided with second connecting holes on both sides along the second direction, and the second direction is the extension direction of the first rotation axis; the yaw block is provided with a third connecting hole extending along the second direction; the second rotating shaft is rotatably connected to the support frame through the second connecting hole, and the second rotating shaft is rotatably connected to the yaw block through the third connecting hole.

6. The print head mechanism according to claim 5, characterized in that: There are two second rotating shafts, and the two second rotating shafts are connected to two ends of the deflection block through the third connecting holes respectively. An avoidance portion for avoiding the first rotating shaft is provided between the two second rotating shafts.

7. The print head mechanism according to claim 5, characterized in that: The side wall of the deflection block is provided with a groove, the bottom of the groove is provided with a waist-shaped hole connected to the third connecting hole, the side wall of the second rotating shaft is provided with a second threaded hole, a screw is passed through the waist-shaped hole and is threadedly connected to the second rotating shaft through the second threaded hole.

8. The print head mechanism according to any one of claims 1 to 7, characterized in that: The print head mechanism also includes a limit screw, which is threadedly connected to the support frame and has an end abutting against the deflection block. The limit screw and the elastic member are located on both sides of the first rotation axis. The elastic member can drive the deflection block to rotate around the first rotation axis and abut against the limit screw.

9. The print head mechanism according to any one of claims 1 to 7, characterized in that: The print head mechanism further comprises a driving shaft and a driving member, wherein the driving shaft is located at a side of the deflection block away from the mounting plate, and the driving member is used for driving the support frame to rotate around the axis of the driving shaft.

10. A blood smear preparation instrument, characterized in that: The blood smear preparation instrument comprises a print head mechanism as described in any one of claims 1-9.

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