Printing device and method for measuring ribbon remaining amount

Abstract

The application discloses a printing device and a method for measuring a carbon tape surplus. The printing device is provided with a carbon tape on a first feeding wheel of a carbon tape feeding mechanism, and a second feeding wheel is used to drive the carbon tape to move. A detection mechanism is used to obtain a detection signal of the first feeding wheel. A processor is used to acquire the detection signal, so as to obtain a first angular velocity of the first feeding wheel based on the detection signal. The processor is also used to acquire carbon tape specification parameters of the first feeding wheel and the second feeding wheel, so as to calculate the carbon tape surplus of the first feeding wheel based on the carbon tape specification parameters and the first angular velocity. The processor of the printing device calculates the carbon tape surplus of the first feeding wheel based on the detection signal of the first feeding wheel and the carbon tape specification parameters, so as to realize automatic detection of the carbon tape surplus under different printing speeds and different carbon tape specifications, improve the accuracy of the carbon tape surplus, facilitate subsequent arrangement of a printing process according to the carbon tape surplus, and further improve the reliability of the printing device.

Description

Technical Field

[0001] This application relates to the field of sample testing technology, and in particular to printing devices and methods for measuring ribbon balance. Background Technology

[0002] Existing sample testing equipment typically requires samples to be collected via a carrier and then sent to the testing equipment for testing. To facilitate the management of sample information, the sample information can be printed onto the sample slide using the thermal transfer principle of a printing device, thus ensuring that the results of the testing equipment correspond to the sample information.

[0003] Existing printing devices have problems such as unclear ribbon allowance when printing sample slides. Current solutions usually set up a table to compare the printing speed with the ribbon allowance to determine the ribbon allowance. However, the table method is only applicable to one ribbon specification. If the ribbon specification of the printing device changes, it cannot correspond to the data in the table, resulting in inaccurate ribbon allowance of the printing device. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a printing apparatus and a method for measuring the remaining amount of the ribbon.

[0005] To address the aforementioned problems, this application provides a first technical solution: a printing device for carbon ribbon allowance, comprising a carbon ribbon supply mechanism, a detection mechanism, and a processor; the carbon ribbon supply mechanism includes a first feed wheel and a second feed wheel, the first feed wheel having a carbon ribbon mounted on it, and the second feed wheel driving the carbon ribbon to move so that the carbon ribbon on the first feed wheel is wound onto the second feed wheel; the detection mechanism is disposed on the first feed wheel and is used to detect the rotation parameters of the first feed wheel to obtain a detection signal; the processor is connected to the detection mechanism and is used to acquire the detection signal to obtain a first angular velocity of the first feed wheel based on the detection signal; the processor is also used to acquire the carbon ribbon specification parameters of the first feed wheel and the second feed wheel to calculate the carbon ribbon allowance of the first feed wheel based on the carbon ribbon specification parameters and the first angular velocity.

[0006] Optionally, the processor is configured to calculate a first constraint equation between the first radius of the first feed wheel and the second radius of the second feed wheel based on the first angular velocity of the first feed wheel; the processor is further configured to calculate a second constraint equation between the first radius and the second radius based on the carbon ribbon specification parameters, so as to calculate the first radius as the carbon ribbon allowance based on the simultaneous calculation of the first constraint equation and the second constraint equation.

[0007] Optionally, the processor is used to calculate a first formula for the length of the carbon belt of the second feed wheel expressed in terms of the first radius based on the carbon belt specification parameters, and to calculate a second formula for the length of the carbon belt of the second feed wheel expressed in terms of the second radius; the processor is also used to calculate the second constraint equation based on the simultaneous calculation of the first formula and the second formula.

[0008] Optionally, the carbon ribbon specifications include the full roll radius of the carbon ribbon loaded on the first feed wheel and the working length of the carbon ribbon. The processor is used to calculate the carbon ribbon length of the first feed wheel based on the full roll radius and the first radius. The processor is used to calculate the first formula based on the carbon ribbon length of the first feed wheel and the working length.

[0009] Optionally, the aforementioned carbon ribbon specifications include the initial radius of the second feed wheel when it is not wound with the carbon ribbon. The processor is used to calculate the number of carbon ribbon layers wound on the second feed wheel based on the initial radius and the second radius. The processor is also used to calculate the second formula based on the number of carbon ribbon layers and the initial radius.

[0010] Optionally, the detection signal is used to represent the detection time of the first feed wheel rotating a preset angle, the processor is used to calculate the first angular velocity based on the detection time, and the processor is also used to obtain the second angular velocity of the second feed wheel, so as to determine the first constraint equation based on the second angular velocity and the first angular velocity, the first constraint equation indicating that the ratio of the first radius to the second radius is equal to the ratio of the second angular velocity to the first angular velocity.

[0011] Optionally, the ribbon supply mechanism further includes a first fastener disposed on the first feed wheel and used to fix the ribbon to the first feed wheel; and / or, the ribbon supply mechanism further includes a second fastener disposed on the second feed wheel and used to fix the wound ribbon to the second feed wheel.

[0012] Optionally, the printing device further includes a printing component disposed on one side of the ribbon supply mechanism. The printing component is used to press the ribbon and print the sample slide under the ribbon. The printing component is used to print the sample slide in a first direction of the printing area. The sample slide includes a first side and a second side that are vertically arranged. The first side is larger than the second side. When the sample slide is placed in the printing area, the second side is parallel to the first direction.

[0013] Optionally, the printing device further includes a display screen connected to the processor. The display screen has a visual interface. The processor is used to obtain the user-set ribbon specifications and printing speed through the visual interface. The processor is also used to determine the second angular velocity of the second feed wheel based on the printing speed, and to calculate the ribbon allowance of the first feed wheel based on the ribbon specifications, the first angular velocity, and the second angular velocity, so as to display the ribbon allowance.

[0014] To address the aforementioned problems, this application provides a second technical solution: a method for measuring ribbon allowance, applied to the printing apparatus described above. The method includes: detecting the rotation parameters of the first feed wheel of the printing apparatus to obtain a detection signal; obtaining a first angular velocity of the first feed wheel based on the detection signal; acquiring the ribbon specification parameters of the first feed wheel and the second feed wheel of the printing apparatus, and calculating the ribbon allowance of the first feed wheel based on the ribbon specification parameters and the first angular velocity.

[0015] This application provides a printing apparatus, a method for measuring ribbon balance, and a ribbon supply mechanism. The ribbon supply mechanism of the printing apparatus includes a first feed wheel and a second feed wheel. A ribbon is mounted on the first feed wheel, and the second feed wheel drives the ribbon to move, causing the ribbon on the first feed wheel to wind onto the second feed wheel. A detection mechanism is disposed on the first feed wheel and is used to detect the rotation parameters of the first feed wheel to obtain a detection signal. A processor is connected to the detection mechanism and is used to acquire the detection signal to obtain a first angular velocity of the first feed wheel based on the detection signal. The processor is also used to acquire the ribbon specification parameters of the first and second feed wheels to calculate the ribbon balance of the first feed wheel based on the ribbon specification parameters and the first angular velocity. The printing apparatus of this application calculates the ribbon balance of the first feed wheel based on the detection signal and ribbon specification parameters, enabling automatic detection of ribbon balance at different printing speeds and with different ribbon specifications. This improves the accuracy of the ribbon balance measurement, facilitates subsequent printing process scheduling based on the ribbon balance, and ultimately enhances the reliability of the printing apparatus. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the printing device provided in this application;

[0018] Figure 2 This is a schematic diagram of the structure of the second embodiment of the printing device provided in this application;

[0019] Figure 3 This is a schematic diagram of the structure of one embodiment of the first fastener and / or the second fastener provided in this application;

[0020] Figure 4 This is a schematic diagram of the third embodiment of the printing apparatus provided in this application;

[0021] Figure 5 yes Figure 4 A schematic diagram of the structure when a medium-sized sample slide is placed in the printing area;

[0022] Figure 6 This is a flowchart illustrating an embodiment of the measurement method provided in this application.

[0023] Among them, 10 is the printing device; 11 is the ribbon supply mechanism; 111 is the first feed wheel; 112 is the second feed wheel; 113 is the first fastener; 114 is the second fastener; 115 is the ribbon; 12 is the detection mechanism; 121 is the code disk; 122 is the detection optocoupler; 13 is the processor; 20 is the base; 30 is the printing assembly; 31 is the sample slide; 31a is the first side; 31b is the second side; 31c is the third side; 31d is the fourth side; 32 is the printing area; and 40 is the ribbon tensioning assembly. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] Please participate Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the printing device provided in this application. Figure 2 This is a schematic diagram of the structure of a second embodiment of the printing apparatus provided in this application. Figure 1 and Figure 2 As shown, the printing apparatus 10 of this embodiment includes a ribbon supply mechanism 11, a detection mechanism 12, and a processor 13.

[0028] The ribbon supply mechanism 11 includes a first feed wheel 111 and a second feed wheel 112. A ribbon 115 is mounted on the first feed wheel 111, and the second feed wheel 112 is used to drive the ribbon 115 to move so that the ribbon 115 on the first feed wheel 111 is wound onto the second feed wheel 112. A detection mechanism 12 is disposed on the first feed wheel 111 and is used to detect the rotation parameters of the first feed wheel 111 to obtain a detection signal. A processor 13 is connected to the detection mechanism 12 and is used to acquire the detection signal to obtain a first angular velocity of the first feed wheel 111 based on the detection signal. The processor 13 is also used to acquire the ribbon specification parameters of the first feed wheel 111 and the second feed wheel 112 to calculate the ribbon allowance of the first feed wheel 111 based on the ribbon specification parameters and the first angular velocity.

[0029] Specifically, the first feed wheel 111 is used to mount the carbon ribbon 115, and the second feed wheel 112 can be connected to the carbon ribbon drive mechanism. The second feed wheel 112 rotates under the driving force of the carbon ribbon drive mechanism and drives the carbon ribbon 115 to move. During the movement of the carbon ribbon 115, the first feed wheel 111 rotates under the action of the carbon ribbon 115 and winds along the moving path to the second feed wheel 112, thereby reducing the amount of carbon ribbon 115 on the first feed wheel 111 and increasing the amount of carbon ribbon 115 on the second feed wheel 112, thus realizing the use and recycling of the carbon ribbon 115. It can be understood that the first feed wheel 111 is the driven wheel, and the second feed wheel 112 is the driving wheel.

[0030] A detection mechanism 12 is mounted on the first feed wheel 111. The detection mechanism 12 is used to detect the rotation parameters of the first feed wheel 111 to obtain a detection signal. In a possible embodiment, the detection mechanism 12 can measure the rotation parameters of the first feed wheel 111 via a code disk 121 or an encoder. These rotation parameters include, but are not limited to, the rotation angle and displacement of the first feed wheel 111, to obtain a detection signal. After obtaining the detection signal from the first feed wheel 111, the detection mechanism 12 transmits the detection signal to a processor 13. The processor 13 is used to obtain the first angular velocity of the first feed wheel 111 based on the detection signal. The processor 13 is also used to obtain the carbon ribbon specification parameters of the first feed wheel 111 and the second feed wheel 112, and to calculate the carbon ribbon allowance of the first feed wheel 111 based on the carbon ribbon specification parameters and the first angular velocity. The carbon ribbon specification parameters include, but are not limited to, the winding radius of the first feed wheel 111 and the second feed wheel 112, the original radius of the carbon ribbon 115 winding, and the radius of a brand-new carbon ribbon 115 when installed on the first feed wheel 111. The carbon belt allowance can be reflected by the actual radius of the first feed wheel 111, or by the calculated carbon belt length, etc., without making specific limitations here.

[0031] In a possible implementation, the detection mechanism 12 may include a code disk 121 and a detection optocoupler 122. The code disk 121 is disposed on the rotating shaft of the first feed wheel 111. The detection optocoupler 122 is connected to the code disk 121 and the processor 13 respectively. The detection optocoupler 122 is used to detect the detection time of the code disk 121 rotating at a preset angle, so that the processor 13 can obtain the corresponding detection signal through the detection optocoupler 122.

[0032] In this embodiment, the printing device 10 includes a ribbon supply mechanism 11 comprising a first feed wheel 111 and a second feed wheel 112. A ribbon 115 is mounted on the first feed wheel 111, and the second feed wheel 112 is used to drive the ribbon 115 to move so that the ribbon 115 on the first feed wheel 111 is wound onto the second feed wheel 112. A detection mechanism 12 is disposed on the first feed wheel 111 and is used to detect the rotation parameters of the first feed wheel 111 to obtain a detection signal. A processor 13 is connected to the detection mechanism 12 and is used to acquire the detection signal to obtain a first angular velocity of the first feed wheel 111 based on the detection signal. The processor 13 is also used to acquire the ribbon specification parameters of the first feed wheel 111 and the second feed wheel 112 to calculate the ribbon allowance of the first feed wheel 111 based on the ribbon specification parameters and the first angular velocity. The printing device 10 calculates the ribbon allowance of the first feed wheel 111 based on the detection signal of the first feed wheel 111 and the ribbon specification parameters through the processor 13. This enables the printing device 10 of this embodiment to automatically detect the ribbon allowance under different printing speeds and different ribbon specifications, improve the accuracy of the ribbon allowance, facilitate the subsequent arrangement of the printing process according to the ribbon allowance, and thus improve the reliability of the printing device.

[0033] In one embodiment, the processor 13 is used to calculate a first constraint equation between the first radius of the first feed wheel 111 and the second radius of the second feed wheel 112 based on the first angular velocity of the first feed wheel 111; the processor 13 is also used to calculate a second constraint equation between the first radius and the second radius based on the carbon ribbon specification parameters, so as to calculate the first radius as the carbon ribbon margin based on the simultaneous calculation of the first constraint equation and the second constraint equation.

[0034] Specifically, the detection signal can be represented by the detection time of the first feed wheel 111 rotating a preset angle. After acquiring the detection signal, the processor 13 calculates the first angular velocity of the first feed wheel 111 based on the following formula:

[0035]

[0036] Where ω1 is the first angular velocity, X1 is the detection time determined based on the detection signal, and Y is the detection accuracy of the detection mechanism 12.

[0037] Since the second feed wheel 112 is the driving wheel and the first feed wheel 111 is the driven wheel, the second angular velocity of the second feed wheel 112 can be obtained by the driving speed of the carbon belt drive mechanism. Furthermore, the linear velocities of the first feed wheel 111 and the second feed wheel 112 are equal during the printing process. Therefore, after obtaining the first angular velocity, the processor 13 can calculate the first constraint equation between the first radius of the first feed wheel 111 and the second radius of the second feed wheel 112 based on the first angular velocity. The first constraint equation can obtain the constraint relationship between the first radius and the second radius.

[0038] The processor 13 is also used to determine the constraint relationship between the first feed wheel 111 and the second feed wheel 112, which are limited by the ribbon 115 during the printing process, based on the ribbon specification parameters, so as to calculate the second constraint equation between the first radius and the second radius, and calculate the first radius of the first feed wheel 111 in the current state as the ribbon allowance based on the simultaneous equation of the first constraint and the second constraint.

[0039] Therefore, the printing device 10 of this application embodiment can calculate the corresponding first constraint equation based on the first angular velocity at different printing speeds, and can also calculate the second constraint equation based on the carbon ribbon specification parameters under different carbon ribbon specifications, which can further improve the accuracy of the carbon ribbon balance, facilitate the subsequent arrangement of the printing process according to the carbon ribbon balance, and thus improve the reliability of the printing device.

[0040] Optionally, the processor 13 is used to calculate a first formula for the length of the carbon belt of the second feed wheel 112 expressed in terms of a first radius based on the carbon belt specification parameters, and a second formula for the length of the carbon belt of the second feed wheel 112 expressed in terms of a second radius; the processor 13 is also used to calculate a second constraint equation based on the simultaneous calculation of the first formula and the second formula.

[0041] Specifically, when not printing, the new ribbon 115 is mounted on the first feed roller 111 and rolled empty on the second feed roller 112; however, during printing, the ribbon 115 on the first feed roller 111 winds onto the second feed roller 112, resulting in a decrease in the ribbon length on the first feed roller 111 and an increase in the ribbon length on the second feed roller 112. Therefore, the processor 13 can be used to calculate a first formula for the ribbon length of the second feed roller 112 expressed in terms of a first radius based on the ribbon specification parameters of the first feed roller 111; the processor 13 can also be used to calculate a first formula for the ribbon length of the second feed roller 112 expressed in terms of a second radius based on the ribbon specification parameters of the second feed roller 112. By combining the first and second formulas, a second constraint equation between the first and second radii can be obtained.

[0042] Therefore, by means of the above method, under different ribbon specifications, the processor 13 can calculate the first formula and the second formula based on the ribbon specification parameters, and determine the second constraint equation based on the simultaneous equation of the first formula and the second formula, thereby further improving the accuracy of the ribbon balance, making it easier for the printing device to arrange the printing process according to the ribbon balance, and thus improving the reliability of the printing device.

[0043] Furthermore, the carbon ribbon specifications include the full roll radius of the carbon ribbon 115 loaded on the first feed wheel 111 and the working length of the carbon ribbon 115. The processor 13 is used to calculate the first carbon ribbon length of the first feed wheel 111 based on the full roll radius and the first radius. The processor 13 is used to calculate the first formula based on the first carbon ribbon length and the working length of the first feed wheel 111.

[0044] Specifically, the full-wind radius of the first feed wheel 111 loaded with carbon ribbon 115 is the radius when the first feed wheel 111 is loaded with brand new carbon ribbon 115. The full-wind radius can include the initial radius of the first feed wheel 111 before the carbon ribbon 115 is wound and the radius of the carbon ribbon. Understandably, after obtaining the full-wind radius, the thickness of a single layer of carbon ribbon 115 can be defined as d to determine the number of first carbon ribbon layers on the first feed wheel 111 at a certain moment and the number of second carbon ribbon layers on the first feed wheel 111 when fully wound. The expressions for the number of first carbon ribbon layers and the number of second carbon ribbon layers are as follows:

[0045]

[0046] Where n1 is the number of the first carbon ribbon layers, r1 is the first radius of the first feed wheel 111 at a certain moment, r0 is the initial radius of the first feed wheel 111, n2 is the number of the second carbon ribbon layers, and r1′ is the full roll radius.

[0047] The length of the carbon ribbon on the first feed roller 111 mentioned above may include a first carbon ribbon length and a second carbon ribbon length. After obtaining the number of first carbon ribbon layers and the number of second carbon ribbon layers, the processor 13 calculates the length of the first carbon ribbon wound on the first feed roller 111 at a certain moment based on the number of first carbon ribbon layers, and calculates the length of the second carbon ribbon when the first feed roller 111 is fully wound based on the number of second carbon ribbon layers. The second carbon ribbon length can be understood as the total length of the carbon ribbon 115. The expressions for the first carbon ribbon length and the second carbon ribbon length are as follows:

[0048]

[0049]

[0050] The working length is the length of the ribbon that is not wound around the first feed roller 111 and the second feed roller 112 during the printing process. Understandably, since the printing area 21 of the printing device is typically between the ribbon 115 of the first feed roller 111 and the second feed roller 112, the length of the ribbon 115 located between the first feed roller 111 and the second feed roller 112 can be defined as the working length. After obtaining the first ribbon length, the second ribbon length, and the working length, the processor 13 can calculate a first formula for the length of the ribbon wound around the second feed roller 112, expressed in terms of a first radius, by subtracting the first ribbon length from the second ribbon length and the working length. That is, the expression for the first formula is as follows:

[0051]

[0052] Where S is the length of the carbon belt on the second feed wheel 112 at a certain moment, L2 is the length of the second carbon belt, L2 is the length of the first carbon belt, and L is the working length.

[0053] Therefore, through the above method, the processor 13 of this embodiment can calculate the first carbon belt length of the first feed wheel 111 and the total length of the carbon belt 115 (second carbon belt length) at a certain moment by using the carbon belt specification parameters and the first radius of the first feed wheel 111, so as to calculate the first formula for the carbon belt length of the second feed wheel 112 expressed in terms of the first radius, which facilitates the subsequent determination of the second constraint equation based on the first formula, and further improves the accuracy of the carbon belt allowance.

[0054] Furthermore, the carbon ribbon specifications include the initial radius of the second feed wheel 112 when the carbon ribbon 115 is not wound around it. The processor 13 is used to calculate the number of carbon ribbon layers wound on the second feed wheel 112 based on the initial radius and the second radius. The processor 13 is also used to calculate a second formula based on the number of carbon ribbon layers and the initial radius.

[0055] Specifically, when the radius of the second feed wheel 112 at a certain moment is defined as the second radius r2 and the thickness of the single-layer carbon ribbon 115 is d, the number of third carbon ribbon layers on the second feed wheel 112 at a certain moment can be calculated based on the initial radius of the second feed wheel 112 before the carbon ribbon 115 is wound. The expression for the number of third carbon ribbon layers is as follows:

[0056]

[0057] Where m is the number of the third carbon belt layer, r2 is the second radius, and r′2 is the initial radius of the second feed wheel 112.

[0058] After obtaining the third carbon belt layer number, the processor 13 calculates the length of the carbon belt wound on the second feed wheel 112 at a certain moment, expressed in terms of the second radius, based on the third carbon belt layer number, that is, calculates the second formula, the expression of the second formula is as follows:

[0059]

[0060] Substituting equation (7) into equation (8), we can expand the expression of the second equation as shown in equation (9).

[0061] After determining equations (6) and (9) above, the processor 13 in this embodiment combines equations (6) and (9) to obtain the second constraint equation as shown below:

[0062]

[0063] Therefore, through the above method, the processor 13 of this embodiment can directly calculate the second formula for the carbon belt length of the second feed wheel 112 expressed in terms of the second radius by using the carbon belt specification parameters and the second radius of the second feed wheel 112. This facilitates the subsequent determination of the second constraint equation based on the first and second formulas, thereby further improving the accuracy of the carbon belt allowance.

[0064] Optionally, the detection signal is used to represent the detection time of the first feed wheel 111 rotating at a preset angle, the processor 13 is used to calculate the first angular velocity based on the detection time, and the processor 13 is also used to obtain the second angular velocity of the second feed wheel 112, so as to determine the first constraint equation based on the second angular velocity and the first angular velocity. The first constraint equation indicates that the ratio of the first radius and the second radius is equal to the ratio of the second angular velocity and the first angular velocity.

[0065] Specifically, since the linear velocities of the first feed wheel 111 and the second feed wheel 112 are equal during the printing process, the first constraint equation can be determined as follows:

[0066] ω1r1=ω2r2;(11)

[0067] Wherein, ω1 is the first angular velocity of the first feed wheel 111. The processor 13 is used to calculate the first angular velocity by the above formula (1) after obtaining the detection time of the first feed wheel 111 rotating at a preset angle. The processor 13 is also used to obtain the second angular velocity ω2 by obtaining the driving speed of the carbon belt drive mechanism.

[0068] Furthermore, after determining the first constraint equation (as in Equation 11) and the second constraint equation (as in Equation 10), the first radius margin calculation expression can be obtained by simultaneously solving the first constraint equation and the second constraint equation, so that the processor 13 can determine the carbon belt margin of the first feed wheel 111 based on the margin calculation expression.

[0069] Specifically, by expanding and combining like terms, Equation 10 is simplified to the following formula:

[0070] -πr22 +πr′ 2 +πr²d-πr′²d=πr¹ 2 -πr1′ 2 +π(r1-r1′)d-ld; (12)

[0071] From equation 11, it can be seen that... Substituting into equation (12) above, we can further obtain the following formula:

[0072]

[0073] Let A = πr′2 2 -πr′2d, Substituting into equation (12) and rearranging the terms, we obtain the following equation:

[0074] (B+π)r2 2 -πr²d+(CA)=0; (13)

[0075] Therefore, a quadratic equation in terms of the second radius r² can be obtained. This can be solved by applying the quadratic equation and based on... The expression for calculating the margin of the first radius can be obtained as follows:

[0076]

[0077] Therefore, the processor 13 in this embodiment can determine the first angular velocity and the second angular velocity of the first feed wheel 111 at different printing speeds, so as to determine the first constraint equation between the first radius and the second radius based on the first angular velocity and the second angular velocity, which facilitates the subsequent calculation of the first radius of the first feed wheel 111 based on the first constraint equation and the second constraint equation, and further improves the accuracy of the carbon ribbon allowance.

[0078] Optionally, please see Figure 3 , Figure 3 This is a structural schematic diagram of an embodiment of the first fastener and / or the second fastener provided in this application. Figure 3 As shown, the carbon ribbon supply mechanism 11 also includes a first fastener 113, which is disposed on the first feed wheel 111 and is used to fix the carbon ribbon 115 to the first feed wheel 111.

[0079] Specifically, when the carbon ribbon 115 is installed on the first feed wheel 111, the carbon ribbon 115 is wound onto the first spool and installed on the first feed wheel 111 through the first spool. The first spool of the carbon ribbon 115 may be provided with a first mating part, and the winding post of the first feed wheel 111 is provided with a first fastener 113. The first fastener 113 engages with the first mating part, so that the first spool of the carbon ribbon 115 can be fixed to the first feed wheel 111. In a possible embodiment, the first fastener 113 may be a spring clip, and the first fastener 113 and the first mating part are relatively fixed through elastic snap-fit.

[0080] Optionally, the carbon ribbon supply mechanism 11 further includes a second fastener 114, which is disposed on the second feed wheel 112 and is used to fix the wound carbon ribbon 115 to the second feed wheel 112.

[0081] Specifically, when the used carbon ribbon 115 is rewound and wound onto the second feed wheel 112, the carbon ribbon 115 is also wound onto the second spool and fixed to the second feed wheel 112 via the second spool. The second spool may be provided with a second mating part, and the winding post of the second feed wheel 112 is provided with a second fastener 114. The second fastener 114 engages with the second mating part, allowing the second spool of carbon ribbon 115 to be fixed onto the second feed wheel 112. In a possible embodiment, the second fastener 114 may be a spring clip, and the second fastener 114 and the second mating part are relatively fixed through an elastic snap-fit.

[0082] By using the above method, the movement stability of the ribbon 115 between the first feed wheel 111 and the second feed wheel 112 can be guaranteed, reducing or avoiding problems such as ribbon 115 loosening, ribbon 115 breaking, and poor printing effect caused by the position movement of the ribbon 115 on the feed wheel, and further improving the stability of the printing process.

[0083] Please participate Figure 4 , Figure 4 This is a schematic diagram of the third embodiment of the printing apparatus provided in this application. Figure 4 As shown, this application embodiment also proposes a printing device 10, which further includes a printing component 30 disposed on one side of a ribbon supply mechanism 11. The ribbon supply mechanism 11 is used to provide a ribbon to a glass slide 31 on a printing area 32. The printing component 30 is used to press the ribbon and print on the glass slide 31 under the ribbon, so that the transfer material of the ribbon 115 can be transferred onto the glass slide 31, thereby printing the sample information onto the glass slide 31.

[0084] Specifically, the printing device 10 may further include a base 20, on which a printing area 32 is provided. The printing area 32 is disposed on the path of the ribbon 115 of the first feed wheel 111 and the second feed wheel 112. The printing area 32 is used to place the glass slide 31 to be printed. The printing area 32 can support the glass slide 31 by a support platform or transport the glass slide 31 to the printing area 32 by a transport platform, so that the printing assembly 30 can print on the glass slide 31. The printing assembly 30 may include a print head and a print head drive mechanism. The print head drive mechanism is used to drive the print head to move so that the print head is aligned with the glass slide 31 in the printing area 32 and presses the ribbon 115 onto the glass slide 31.

[0085] In one embodiment, please participate Figure 5 , Figure 5 yes Figure 4 A schematic diagram of the structure when the middle glass slide is placed in the printing area. (See diagram below.) Figure 5 As shown, the printing assembly 30 is used to print a glass slide 31 in a first direction of the printing area 32. The glass slide 31 includes a first side 31a and a second side 31b that are vertically arranged. The first side 31a is larger than the second side 31b. When the glass slide 31 is placed in the printing area 32, the second side 31b is parallel to the first direction.

[0086] Specifically, the printing device 10 also includes a ribbon driving mechanism, which drives the second feed wheel 112 to rotate, causing the ribbon 115 to move along the first direction. Simultaneously, a printhead driving mechanism drives the printhead to move along the first direction, so that the ribbon 115 and the printhead move synchronously. During the printing process on the glass slide 31, the printhead and the ribbon 115 remain relatively stationary to ensure close contact between the printhead and the glass slide 31 via the ribbon 115. During printing, the glass slide 31 includes a vertically arranged first side 31a and a second side 31b, where the first side 31a is larger than the second side 31b. When the glass slide 31 is placed in the printing area 32, the second side 31b is parallel to the first direction.

[0087] The glass slide 31 may also include a third side 31c and a fourth side 31d, with the third side 31c opposite to the second side 31b and the fourth side 31d opposite to the first side 31a. Since existing glass slides 31 are typically elongated strips, and the printing length of the print head is usually less than or equal to the lengths of the third side 31c and the fourth side 31d, when the existing printing device 10 feeds the glass slide 31 longitudinally, the print head will simultaneously contact the third side 31c and the second side 31b of the glass slide 31, causing both sides to wear down the print head, resulting in severe print head wear. In this embodiment, by aligning the second side 31b of the glass slide 31 parallel to the first direction when placed on the printing area 32, the print head in this embodiment will only contact either the second side 31b or the third side 31c of the glass slide 31 during the printing process, significantly reducing print head wear and protecting the print head.

[0088] Therefore, the printing apparatus 10 of this embodiment adjusts the feeding direction of the glass slide 31 so that the shorter second side 31b of the glass slide 31 is parallel to the printing direction of the print head, so that during the printing process, the print head only contacts one side edge of the glass slide 31 at most, which can reduce the wear of the edge of the glass slide 31 on the print head and improve the service life of the print head.

[0089] In one embodiment, the printing device 10 further includes a display screen (not shown), which is connected to the processor 13. The display screen has a visual interface, and the processor 13 is used to obtain the user-set ribbon specifications and printing speed through the visual interface. The processor 13 is also used to determine the second angular velocity of the second feed wheel 112 based on the printing speed, and to calculate the ribbon allowance of the first feed wheel 111 based on the ribbon specifications, the first angular velocity, and the second angular velocity.

[0090] Specifically, users can set the ribbon specifications and printing speed of the printing device 10 through a visual interface on the display screen. The printing device 10 controls the printing speed of the slide information by controlling the second angular velocity of the second feed wheel 1120. Based on the user-set printing speed, the printing device 10 can determine the corresponding second angular velocity, allowing the processor 13 to calculate the corresponding second constraint equation based on the set ribbon specifications and the corresponding first constraint equation based on the set second angular velocity. The processor 13 can then calculate the corresponding ribbon allowance based on the first and second constraint equations. Optionally, in some embodiments, the display screen can also directly provide a second angular velocity setting function, calculating the corresponding ribbon allowance based on the user-set second angular velocity. The processor 13 can display the calculated ribbon allowance on the visual interface, or generate a warning message displayed on the visual interface when the ribbon allowance is below a preset threshold; no specific limitations are specified here.

[0091] Therefore, the printing device 10 of this embodiment can update the calculation formula of the ribbon balance based on the ribbon specification parameters and printing speed set by the user, so as to realize the automatic detection of the ribbon balance under different printing speeds and different ribbon specifications, improve the accuracy of the ribbon balance, facilitate the printing device 10 to arrange the printing process according to the ribbon balance, and thus improve the reliability of the printing device 10.

[0092] In one embodiment, the printing device 10 further includes a ribbon tensioning assembly 40 disposed on the base 20. The ribbon tensioning assembly 40 is used to provide tension to the ribbon 115 on the ribbon supply mechanism 11 to prevent the ribbon 115 from breaking.

[0093] Optionally, such as Figure 4 As shown, the first feed wheel 111 and the printing assembly 30 are respectively arranged along the gravity direction of the base 20, and the ribbon tensioning assembly 40 is located on one side of the printing assembly 30. The second feed wheel 112 and the ribbon tensioning assembly 40 are respectively arranged along the gravity direction of the base 20. The second feed wheel 112 and the first feed wheel 111 are arranged sequentially along the first direction, and the ribbon tensioning assembly 40 and the printing assembly 30 are arranged sequentially along the first direction.

[0094] Please participate Figure 6 , Figure 6 This is a flowchart illustrating an embodiment of the measurement method provided in this application. Figure 6 As shown in the embodiments of this application, a method for measuring the ribbon allowance is also proposed. This method can be applied to the printing apparatus 10 of any of the above embodiments. The measurement method includes:

[0095] Step S10: Detect the rotation parameters of the first feed wheel 111 of the printing device 10 to obtain a detection signal.

[0096] Specifically, the rotation parameters of the first feed wheel 111 of the printing device 10 are detected to obtain the detection signal of the first feed wheel 111. The detection signal is used to indicate the detection time of the first feed wheel 111 rotating at a preset angle.

[0097] Step S20: Obtain the first angular velocity of the first feed wheel 111 based on the detection signal.

[0098] After obtaining the detection signal, the first angular velocity of the first feed wheel 111 can be calculated based on the detection signal, so as to measure the printing speed through the first angular velocity.

[0099] Step S30: Obtain the ribbon specification parameters of the first feed wheel 111 and the second feed wheel 112 of the printing device 10, and calculate the ribbon allowance of the first feed wheel 111 based on the ribbon specification parameters and the first angular velocity.

[0100] Further, the carbon belt specification parameters of the first feed roller 111 and the second feed roller 112 are obtained. Based on the carbon belt specification parameters and the first angular velocity, the carbon belt allowance of the first feed roller 111 is calculated. The carbon belt specification parameters include, but are not limited to, the winding radius of the first feed roller 111 and the second feed roller 112, the original radius of the carbon belt 115 winding, and the radius of the brand-new carbon belt 115 when installed on the first feed roller 111. The carbon belt allowance can be reflected by the actual radius of the first feed roller 111 or by the calculated carbon belt length, etc., and is not specifically limited here.

[0101] Therefore, the measurement method of this embodiment detects the rotation parameters of the first feed wheel 111 of the printing device 10 to obtain a detection signal, obtains the first angular velocity of the first feed wheel 111 based on the detection signal, obtains the ribbon specification parameters of the first feed wheel 111 and the second feed wheel 112 of the printing device 10, and calculates the ribbon allowance of the first feed wheel 111 based on the ribbon specification parameters and the first angular velocity. This allows the measurement method of this embodiment to automatically detect the ribbon allowance under different printing speeds and different ribbon specifications, improves the accuracy of the ribbon allowance, facilitates the subsequent printing process arrangement of the printing device 10 according to the ribbon allowance, and thus improves the reliability of the printing device 10.

[0102] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A printing device, characterized in that, include: A ribbon feeding mechanism includes a first feed wheel and a second feed wheel. A ribbon is mounted on the first feed wheel, and the second feed wheel is used to drive the ribbon to move so that the ribbon on the first feed wheel is wound onto the second feed wheel. A detection mechanism is disposed on the first feed wheel, and the detection mechanism is used to detect the rotation parameters of the first feed wheel to obtain a detection signal; A processor, connected to the detection mechanism, is configured to acquire the detection signal to obtain a first angular velocity of the first feed wheel based on the detection signal; the processor is also configured to acquire the carbon ribbon specification parameters of the first feed wheel and the second feed wheel to calculate the carbon ribbon allowance of the first feed wheel based on the carbon ribbon specification parameters and the first angular velocity.

2. The printing apparatus according to claim 1, characterized in that, The processor is configured to calculate a first constraint equation between the first radius of the first feed wheel and the second radius of the second feed wheel based on the first angular velocity of the first feed wheel; the processor is also configured to calculate a second constraint equation between the first radius and the second radius based on the carbon ribbon specification parameters, so as to calculate the first radius as the carbon ribbon margin based on the simultaneous calculation of the first constraint equation and the second constraint equation.

3. The printing apparatus according to claim 2, characterized in that, The processor is used to calculate a first formula for the length of the carbon belt of the second feed wheel expressed in terms of the first radius based on the carbon belt specification parameters, and to calculate a second formula for the length of the carbon belt of the second feed wheel expressed in terms of the second radius; the processor is also used to calculate the second constraint equation based on the simultaneous calculation of the first formula and the second formula.

4. The printing apparatus according to claim 3, characterized in that, The carbon ribbon specifications include the full roll radius of the carbon ribbon loaded on the first feed wheel and the working length of the carbon ribbon. The processor is used to calculate the carbon ribbon length of the first feed wheel based on the full roll radius and the first radius. The processor is used to calculate the first formula based on the carbon ribbon length of the first feed wheel and the working length.

5. The printing apparatus according to claim 3, characterized in that, The carbon ribbon specifications include the initial radius of the second feed wheel when it is not wound with the carbon ribbon. The processor is used to calculate the number of carbon ribbon layers wound on the second feed wheel based on the initial radius and the second radius. The processor is also used to calculate the second formula based on the number of carbon ribbon layers and the initial radius.

6. The printing apparatus according to claim 2, characterized in that, The detection signal is used to represent the detection time of the first feed wheel rotating a preset angle. The processor is used to calculate the first angular velocity based on the detection time. The processor is also used to obtain the second angular velocity of the second feed wheel, so as to determine the first constraint equation based on the second angular velocity and the first angular velocity. The first constraint equation indicates that the ratio of the first radius to the second radius is equal to the ratio of the second angular velocity to the first angular velocity.

7. The printing apparatus according to claim 2, characterized in that, The ribbon supply mechanism further includes a first fastener disposed on the first feed wheel, the first fastener being used to fix the ribbon to the first feed wheel; and / or The carbon ribbon supply mechanism further includes a second fastener, which is disposed on the second feed wheel and is used to fix the wound carbon ribbon on the second feed wheel.

8. The printing apparatus according to claim 1, characterized in that, The printing device further includes a printing assembly disposed on one side of the ribbon supply mechanism. The ribbon supply mechanism is used to provide ribbon to the glass slide in the printing area, and the printing assembly is used to press the ribbon and print the glass slide under the ribbon. The printing component is used to print the glass slide in a first direction in the printing area. The glass slide includes a first side and a second side that are vertically arranged. The first side is larger than the second side. When the glass slide is placed in the printing area, the second side is parallel to the first direction.

9. The printing apparatus according to claim 1, characterized in that, The printing device further includes a display screen connected to the processor. The display screen has a visual interface. The processor is used to obtain the ribbon specification parameters and printing speed set by the user through the visual interface. The processor is also used to determine the second angular velocity of the second feed wheel based on the printing speed, and to calculate the ribbon allowance of the first feed wheel based on the ribbon specification parameters, the first angular velocity, and the second angular velocity.

10. A method for measuring the carbon ribbon allowance, characterized in that, Applied to a printing apparatus as described in any one of claims 1-9, the measurement method comprises: The rotation parameters of the first feed wheel of the printing device are detected to obtain a detection signal; The first angular velocity of the first feed wheel is obtained based on the detection signal; Obtain the ribbon specification parameters of the first feed wheel and the second feed wheel of the printing device, and calculate the ribbon allowance of the first feed wheel based on the ribbon specification parameters and the first angular velocity.

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