A medical three-dimensional model printer

Abstract

The present invention discloses a medical three-dimensional model printer, including a nozzle shaft and an outer set that are connected by shaft rotation, and a feed port and a plurality of feed channels that are matched with each other are arranged between the nozzle shaft and the outer set. Each feed is realized by supplying wire materials of different colors, and the nozzle shaft is rotated to make the feed port and different feed channels match with each other, so as to realize the color change. At the same time, by setting a negative pressure suction port and a negative pressure channel, when changing the color, the nozzle shaft is first rotated to make the negative pressure suction port and the negative pressure channel communicate with each other, and the previous color material in the discharge channel is sucked out by negative pressure, and the residual material is removed, so that the organ tube tissue printed by the different color materials is clear and identifiable. It is convenient to clarify the internal structure of the organ tube and simulate the drill before the operation, improve the accuracy and quality of the operation, have good use effect, and be more practical, and it is worthy of wide promotion and application.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a medical three-dimensional model printer. Background Art

[0002] In the clinical practice of liver resection, the liver is a three-dimensional organ, and the internal blood vessels and bile ducts have many variations and complex structures. In addition, the liver tissue is fragile and easy to bleed, which brings great difficulty to the clinical operation of liver resection. Liver resection has gone through several development stages, including "blind liver resection", "regular liver lobectomy", "irregular local liver resection", "liver segment resection" and "precision liver resection", and has been constantly pursuing and moving towards precision.

[0003] At present, accurate liver resection is the concept of liver surgery. However, traditional imaging examinations cannot meet the requirements of accurate preoperative evaluation. In recent years, with the development of computer and 3D printing technology, the application of three-dimensional reconstruction and 3D printing technology in the medical field has become more and more extensive. The liver and other organs are rich in blood vessels. Using multiple colors to distinguish blood vessels, bile ducts and lesions will greatly facilitate accurate preoperative evaluation and is of great significance for the implementation of accurate liver resection.

[0004] Traditional 3D printers can usually only print one type of consumables. When printing in multiple colors, there is the inconvenience of changing lines and low efficiency. Some printers print a layer of material and then spray a layer of the corresponding color, printing alternately. The printed model is faded, blurred, and the structure is unclear. Some printers use multiple print heads to print multiple different colors of materials. During use, non-printing nozzles often leak or become clogged.

[0005] Therefore, there is an urgent need for a medical 3D model printer that is stable, reliable, prints clear models and is highly efficient. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a medical three-dimensional model printer that can effectively print out models of tissues, organs, and lesions such as the patient's liver using consumables of a variety of different colors. The organ tissues are clearly distinguished, which facilitates preoperative clarification of the internal structure of the tissues and organs and preoperative simulation drills, thereby improving accuracy, reducing surgical difficulty, and improving surgical quality.

[0007] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a medical three-dimensional model printer, comprising a 3D printing assembly and a printing platform arranged in a box body, the 3D printing assembly comprising a fixed seat, a nozzle shaft and an outer sleeve connected to a three-dimensional moving mechanism, wherein the nozzle shaft is rotationally connected to the outer sleeve shaft, the outer sleeve is fixedly connected to the fixed seat through a connecting piece, the center of the nozzle shaft has an axial discharge channel, the side of the discharge channel and the outer sleeve shaft rotation sleeve portion has a feed port and a negative pressure suction port connected to the discharge channel, the outer sleeve has a feed channel and a negative pressure channel respectively corresponding to the feed port and the negative pressure suction port, and the feed channel is multiple.

[0008] The bottom of the box body has a base, and a Z-direction drive motor, a driving wheel, and a driven wheel are arranged in the base. A plurality of Z-direction drive threaded shafts are arranged in the box body, and the lower ends of the threaded shafts extend into the base and are respectively connected to the driven wheels. The driving wheel is located at the center of the plurality of driven wheels and is meshed with the plurality of driven wheels for transmission.

[0009] The nozzle shaft is rotatably connected to the sealing matching shaft of the outer sleeve, and sealing rings are respectively arranged at the upper and lower parts of the connection part between the nozzle shaft and the outer sleeve.

[0010] The nozzle shaft is provided with pressure rings above and below the outer sleeve respectively, and balls are arranged circumferentially on the contact surface side of the pressure ring with the outer sleeve, and the outer sleeve is provided with an annular groove corresponding to the balls.

[0011] The feed channel is an inclined structure.

[0012] The wire in at least one of the feed channels is made of transparent material.

[0013] The feed channels are all connected to the wire inlet on the box body through wire pipes.

[0014] A wire controller is provided at each of the wire inlets.

[0015] The top end of the nozzle shaft is linked to a control motor arranged on a fixing seat.

[0016] The feed port and the negative pressure suction port have a radial angle of a certain angle and / or an axial height difference of a certain height, so that the feed port and the feed channel, and the negative pressure suction port and the negative pressure channel do not correspond to each other at the same time.

[0017] The outer set is provided with a detachable material collection box, which is communicated with the negative pressure channel and connected with the negative pressure device through a negative pressure pipe.

[0018] The present invention adopts a nozzle shaft and an outer set that are rotatably connected to each other, and provides a feed port and a plurality of feed channels that correspond to each other between the nozzle shaft and the outer set. Each feed is supplied with wire material raw materials of different colors, thereby effectively realizing the rotation of the nozzle shaft so that the feed port corresponds to different feed channels to achieve color change. At the same time, by providing a negative pressure suction port and a negative pressure channel, when changing the color, the nozzle shaft is first rotated to make the negative pressure suction port and the negative pressure channel correspondingly connected, and the previous color raw material in the discharge channel is sucked out by negative pressure, and the residual raw material is removed, so that the tube structure printed by raw materials of different colors is clearly distinguishable.

[0019] Preferably, the feed channel adopts an inclined structure, which can effectively facilitate feeding. By using a transparent wire, the external structure can be printed using the transparent wire when printing the model, which makes it convenient to intuitively see the internal organ tissue or diseased parts printed in other colors, making it easier to clarify the internal structure of the organ and tube and conduct simulation drills before surgery, thereby improving the accuracy and quality of the surgery.

[0020] The present invention can effectively avoid the inconvenience of changing lines, unclear distinction and color dripping or clogging of non-printing nozzles in the prior art 3D printers, has good use effect and stronger practicality, and is worthy of wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 is a schematic diagram of the structure of the print head;

[0024] Figure 3 It is a top view structural diagram of the nozzle shaft and the outer set;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the feed port;

[0026] Figure 5 It is a structural schematic diagram of the top surface of the box;

[0027] Figure 6 It is a printing effect diagram. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with specific implementation methods.

[0029] See also Figure 1-5The medical three-dimensional model printer of the present invention comprises a box body 1 and a 3D printing assembly and a printing platform 2 arranged in the box body 1. The bottom of the box body 1 has a base 3. The 3D printing assembly comprises a three-dimensional moving mechanism and a print head 4 connected and controlled with the three-dimensional moving mechanism. The three-dimensional moving mechanism comprises a Z-direction driving motor 5, a driving wheel 6, and a driven wheel 7 arranged in the base 3. Four Z-direction driving threaded shafts 6 are arranged in the box body 1. The lower ends of the threaded shafts 6 extend into the base 3 and are respectively connected to four driven wheels 7. The driving wheel 6 is located at the center of the four driven wheels 7 and is meshed with the four driven wheels 7 for transmission. In the box body 1, each threaded shaft 6 is threadedly connected with a threaded sleeve 9, and a horizontal frame is connected to the threaded shaft 6 through the threaded sleeve 9. A cross-shaped X-axis slide bar and a Y-axis slide bar are arranged in the horizontal frame. The two ends of the X-axis slide bar and the Y-axis slide bar are respectively controlled by a driving control mechanism to slide along the side of the horizontal frame. A slide seat 10 having sliding holes corresponding to the X-axis slide bar and the Y-axis slide bar is slidably sleeved on the X-axis slide bar and the Y-axis slide bar through the sliding holes. The slide seat 10 is controlled to move in the plane of the frame by the X-axis slide bar and the Y-axis slide bar to realize the X-axis and Y-axis movement control of the print head. The horizontal frame and the print head are controlled to move in the Z direction by four Z-axis driving threaded shafts 6. Each threaded shaft 6 is driven simultaneously by the same driving wheel 6 to realize synchronous movement, which can effectively improve the stability of the horizontal frame.

[0030] The print head 4 includes a fixed seat 41, a nozzle shaft 42 and an outer sleeve 43, wherein the nozzle shaft 42 and the outer sleeve 43 are sealed and axially rotatably connected, and the upper and lower parts of the connecting part of the nozzle shaft 42 and the outer sleeve 43 are respectively provided with graphite shaft sealing rings 413, and the nozzle shaft 42 is provided with pressure rings 414 on the upper and lower parts of the outer sleeve 43 for upper and lower limit. Balls are circumferentially arranged on the contact surface side of the pressure ring 414 with the outer sleeve 43, and the outer sleeve 43 has an annular groove corresponding to the ball, so as to realize the rolling friction of the ball between the upper and lower limit pressure ring 414 and the outer sleeve 43 to reduce the friction resistance.

[0031] The outer sleeve 43 is fixedly connected to the fixed seat 41 through the connecting column 40, the fixed seat 41 is fixedly connected to the slide 10, and the top of the nozzle shaft 42 is linked with the stepping rotation control motor 49 arranged on the fixed seat 41 to drive the nozzle shaft 42 to rotate. The center of the nozzle shaft 42 has an axial discharge channel 44, and the lower end of the discharge channel 44 discharges the material at the nozzle at the lower end of the nozzle shaft 42. The nozzle shaft 42 is an integrated structure, or the nozzle part at its lower end is a split and detachable connection. The nozzle part is arranged outside the temperature control mechanism 412 to achieve the melting of the consumables in the discharge channel 44 and the solidification after spray printing. The side of the axial rotation sleeve joint of the nozzle shaft 42 and the outer sleeve 43 has a feed port 45 and a negative pressure suction port 46 connected to the discharge channel 44. The outer sleeve 43 has a feed channel 48 corresponding to the feed port 45 and a negative pressure channel 47 corresponding to the negative pressure suction port 46. There are multiple feed channels 48, and four are used in this embodiment, corresponding to the feeding of four different colors of wire raw materials. The feed channels 48 are all inclined structures and are respectively connected to the wire inlet 13 on the top surface of the box body 1 through the corresponding wire pipes 11. The wire pipe 14 preferably adopts a threaded pipe. A wire controller 12 is provided at the wire inlet 13, and the wire controller 12 controls the advance, retreat and stop actions of different wire raw materials.

[0032] By rotating the nozzle shaft 42 and the outer sleeve 43 at a relative angle, the wire is cut off. At the same time, the feed port 45 is changed to correspond to different feed channels 48, and wires of different colors are supplied to the discharge channel of the nozzle shaft 42, so that consumables of different colors can be replaced for printing. During the color changing process, the nozzle shaft 42 first rotates to cut off and melt the wire, and then rotates to the negative pressure suction port 46 to correspond to the negative pressure channel 47 to suck out the melted residual wire, so as to avoid mixing of wires of different colors, which will cause the printed model to be messy and blurred.

[0033] Preferably, the feed port 45 and the negative pressure suction port 46 have a radial angle of a certain angle and / or an axial height difference of a certain height, so that the feed port 45 and the feed channel 48, and the negative pressure suction port 46 and the negative pressure channel 47 do not correspond to each other at the same time. The outer end of the feed port 45 has a blade 451, which can be used to cut off the wire and reduce the rotational resistance.

[0034] In another preferred step, a detachable material collecting box 410 is threadedly connected to the outer sleeve 43, and the material collecting box 410 is connected to the negative pressure channel 47, and is connected to the negative pressure interface 14 on the top surface of the box body 1 through a negative pressure pipe 411, and then connected to an external negative pressure device through a control valve, see Figure 2The bottom surface of the outer sleeve 43 has a threaded groove threadedly connected to the collection box 410, the negative pressure tube 411 and the negative pressure channel 47 are respectively connected to the top of the threaded groove, and the collection box 410 is threadedly installed in the threaded groove. When negative pressure suction is realized, the residual raw material enters the negative pressure channel 47 through the negative pressure suction port 46, and then falls into the collection box 410 for recycling and temporary storage.

[0035] The medical three-dimensional model printer of the present invention automatically switches wires of different colors and automatically cleans up residual consumables, so that the organ tube tissues printed by raw materials of different colors are clearly distinguishable. Figure 6 It is convenient for clarifying the internal structure of the tissue organ tube and conducting simulation drills before surgery, improving the accuracy and quality of surgery, has good use effect, and is more practical, and is worthy of wide promotion and application.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. The technical solutions of the present invention are not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A medical three-dimensional model printer, comprising a 3D printing assembly and a printing platform arranged in a box, characterized in that: The 3D printing assembly includes a fixed seat, a nozzle shaft and an outer sleeve connected to a three-dimensional moving mechanism, wherein the nozzle shaft is rotationally connected to the outer sleeve shaft, and the outer sleeve is fixedly connected to the fixed seat through a connecting piece. The center of the nozzle shaft has an axial discharge channel, and the lower end of the discharge channel discharges at the nozzle at the lower end of the nozzle shaft. The side of the rotation sleeve connection between the discharge channel and the outer sleeve shaft has a feed port and a negative pressure suction port connected to the discharge channel. The outer sleeve has a feed channel and a negative pressure channel respectively corresponding to the feed port and the negative pressure suction port. There are multiple feed channels. Through the rotation of the nozzle shaft, its feed port cuts off the wire. The feed port corresponds to different feed channels, and wires of different colors are supplied to the discharge channel of the nozzle shaft to realize the replacement of consumables of different colors for printing. During the color change process, the nozzle shaft first rotates to cut off and melt the wire, and then rotates to the negative pressure suction port corresponding to the negative pressure channel to suck out the molten residual wire.

2. The printer according to claim 1, wherein: The bottom of the box body has a base, and a Z-direction drive motor, a driving wheel, and a driven wheel are arranged in the base. A plurality of Z-direction drive threaded shafts are arranged in the box body, and the lower ends of the threaded shafts extend into the base and are respectively connected to the driven wheels. The driving wheel is located at the center of the plurality of driven wheels and is meshed with the plurality of driven wheels for transmission.

3. The printer according to claim 1, wherein: The nozzle shaft is rotatably connected to the sealing matching shaft of the outer sleeve, and sealing rings are respectively arranged at the upper and lower parts of the connection part between the nozzle shaft and the outer sleeve.

4. The printer according to claim 1, wherein: The nozzle shaft is provided with pressure rings above and below the outer sleeve respectively, and balls are arranged circumferentially on the contact surface side of the pressure ring with the outer sleeve, and the outer sleeve is provided with an annular groove corresponding to the balls.

5. The printer according to claim 1, wherein: The feed channel is an inclined structure.

6. The printer according to claim 1, wherein: The wire in at least one of the feed channels is made of transparent material.

7. The printer according to claim 1, characterized in that: The feed channels are all connected to the wire inlet on the box body through wire pipes.

8. The printer according to claim 1, wherein: A wire controller is provided at the feed inlet.

9. The printer according to claim 1, wherein: The top end of the nozzle shaft is linked to a control motor arranged on a fixing seat.

10. The printer according to claim 1, wherein: The outer set is provided with a detachable material collection box, which is communicated with the negative pressure channel and connected with the negative pressure device through a negative pressure pipe.

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