Photographic paper output mechanism and thermal sublimation printer

Abstract

A photographic paper output mechanism is characterized in that the photographic paper output mechanism comprises a base frame, a paper feeding rubber roller, a paper feeding motor, a paper feeding swing rod, a transmission mechanism and a sliding block, the paper feeding rubber roller is rotatably arranged on the base frame, one end of the paper feeding rubber roller is provided with a paper feeding gear, and the section of the paper feeding rubber roller is in a fan shape; the paper feeding swing rod is arranged on the base frame in a swinging manner, a clutch gear is arranged on the paper feeding swing rod, and the clutch gear is connected with the paper feeding gear in a clutch manner; when the paper feeding swing rod is in contact fit with the first guide part, the clutch gear is in meshing transmission with the paper feeding gear; the paper feeding swing rod is in contact fit with the second guide part; and the clutch gear is separated from the paper feeding gear. The invention further discloses the thermal dye sublimation printer. The paper feeding swing rod achieves separation and reunion, the fan-shaped paper feeding roller facilitates smooth photographic paper output, retreating of the sliding block is not affected, and the design is exquisite and simple.

Description

TECHNICAL FIELD

[0001] The present application relates to a printing output device, in particular to a photo paper output mechanism of a thermal dye sublimation printing device, and also relates to the thermal dye sublimation printing device. BACKGROUND

[0002] The thermal dye sublimation printer is increasingly applied in photo printing. The general working principle is that the dry solid ink on the ribbon, i.e. the toner mixed with a polymer, is thinly coated on the ribbon in three blocks of yellow, cyan and magenta, which is slightly larger than the size of the printed photo paper. When printing, the photo paper and the ribbon pass through a printing roller at the same time, and are heated under the printing head. The dry solid ink on the ribbon is melted by the single-crystal silicon heating point array of the printing head. During the heating process, the heat separates the polymer molecules. When the printing head passes, the temperature drops, and the ink changes from gas to solid, and the ink is embedded in the polymer. The polymer molecules are polymerized together. After printing one color, the photo paper is automatically moved to the beginning to print the next color, so that millions of color mixtures are generated on the photo paper by the ribbon, and a high-quality picture effect is obtained.

[0003] There are three modes that need to be switched during printing: taking paper, advancing and retreating paper, and winding ribbon. Only one color is transferred to the photo paper at a time during printing, and a protective layer is generally added after the three colors are transferred to the paper. Therefore, the advancing and retreating paper mode and the winding ribbon mode need to be repeated four times.

[0004] The existing thermal dye sublimation printer basically includes a photo paper output mechanism, a printing head assembly and a ribbon driving mechanism. When printing, the ribbon cartridge with the ribbon and the photo paper needs to be installed on the thermal dye sublimation printer. The photo paper output mechanism can output the photo paper in the ribbon cartridge one by one. The printing head assembly can print the ribbon on the photo paper. The ribbon driving mechanism can drive the ribbon to wind.

[0005] Referring to the Chinese invention patent No. ZL201811219755.5, “Rack device of portable thermal dye sublimation printer” (authorized publication number CN111070912B), the photo paper output mechanism in the patent includes a wedge-shaped part 115, a dynamic pickup roller 105, a rack 106, a mode motor 101, etc. When the mode motor 101 rotates forward, it drives the wedge-shaped part 115 to retreat, and at the same time drives the pickup roller 105 to lower and rotate, and then the photo paper is taken out by the pickup roller 105. When the mode motor 101 reverses, it drives the wedge-shaped part 115 to advance, and drives the pickup roller 105 to lift, avoiding the photo paper from being blocked when it retreats. The above structure has the following disadvantages: once the front photo paper is not completely taken out, when the wedge-shaped part 115 advances, the pickup roller 105 reverses, and the photo paper is taken back into the photo paper slot, so that the photo paper output is incorrect, and serious paper jam may occur, thereby affecting normal printing. SUMMARY

[0006] The first technical problem to be solved by the present application is to provide a photographic paper output mechanism with smooth photographic paper strip-out.

[0007] The second technical problem to be solved by the present application is to provide a thermal sublimation printer with smooth photographic paper strip-out.

[0008] The technical solution adopted by the present application to solve the first technical problem is a photographic paper output mechanism, characterized by comprising

[0009] a base frame;

[0010] a paper feeding rubber roller rotatably arranged on the base frame and having a paper feeding gear at one end, the cross section of the paper feeding rubber roller being in the shape of a sector;

[0011] a paper feeding motor arranged on the base frame and having a power output end;

[0012] a paper feeding swing lever swingably arranged on the base frame, the paper feeding swing lever being provided with a clutch gear, the clutch gear being in clutch connection with the paper feeding gear;

[0013] a transmission mechanism arranged on the base frame, the power input end of the transmission mechanism being connected with the power output end of the paper feeding motor, the power output end of the transmission mechanism having an output gear, the output gear being in meshing connection with the clutch gear; and

[0014] a slide block horizontally movably arranged on the base frame and having a rack part in meshing connection with the output gear and a guide part matched with the paper feeding swing lever at one side; the rack part is in meshing connection with the output gear, and the guide part includes a first guide part in a low position, a second guide part in a high position and a transition part in an inclined shape in the length direction of the guide part, the transition part connecting the first guide part and the second guide part;

[0015] in the state that the paper feeding swing lever is in contact with the first guide part, the clutch gear is in meshing transmission with the paper feeding gear; in the state that the paper feeding swing lever is in contact with the second guide part, the paper feeding swing lever is flipped and drives the clutch gear to disengage from the paper feeding gear.

[0016] Preferably, the central angle of the sector is obtuse.

[0017] Preferably, the power output end of the paper feeding motor has a driving gear, and the transmission mechanism is a gear set, the input gear of the gear set being in meshing connection with the driving gear.

[0018] Further, a damping spring is arranged between the clutch gear and the paper feeding swing lever, in the state that the slide block is in a retracted state, the clutch gear can flip the paper feeding swing lever through the damping spring.

[0019] Further, the base frame is provided with a limiting mechanism, when the clutch gear is in a disengaged state from the paper feed gear, the paper feed rubber roller is limited to rotate continuously by the limiting mechanism; when the clutch gear is in an engaged state with the paper feed gear, the paper feed rubber roller can rotate by overcoming the limiting mechanism. The limiting mechanism can ensure the positioning of the paper feed rubber roller and prevent the paper from being interfered.

[0020] Preferably, the paper feed rubber roller is rotatably arranged on the base frame through a rubber roller shaft, one side of the rubber roller shaft is provided with a positioning pin, and the limiting mechanism comprises an elastic member and a positioning block, two ends of the elastic member are respectively abutted with the positioning block and the base frame, and the positioning block is provided with a limiting groove matched with the positioning pin.

[0021] Further, the limiting groove is in a flared shape, and both sides of the limiting groove are formed with inclined surfaces for the positioning pin to slide out or slide in.

[0022] The paper feed gear is axially extended with a sleeve, the sleeve is assembled on the rubber roller shaft, and the positioning pin is formed on one side of the sleeve. The sleeve, the paper feed gear and the positioning pin are an integral piece, which is beneficial to production and manufacturing.

[0023] The technical scheme adopted by the present application to solve the second technical problem is: a thermal dye sublimation printer, characterized in that the printer comprises a photographic paper output mechanism, a print head assembly and a ribbon drive mechanism, and the print head assembly and the ribbon drive mechanism are arranged on a base frame.

[0024] Compared with the prior art, the present application has the advantages that: the forward rotation of the paper feed motor drives the paper feed rubber roller to rotate and the slider to advance, and the reverse rotation only drives the slider to move back to the original position. The position of the slider can be controlled by controlling the number of steps, and the position can be controlled accurately without using an optical coupler to determine the position, thereby reducing the manufacturing cost. In addition, since the cross section of the paper feed rubber roller is fan-shaped, the transmission force of the paper feed rubber roller is interrupted during the backward movement of the slider, and the output photographic paper does not come into contact with the photographic paper slot of the ribbon, so that the photographic paper is not brought back to the photographic paper slot of the ribbon. Compared with the lifting arrangement of the paper feed rubber roller in the prior art, the design is more flexible and simple, and the risk of the photographic paper being stuck is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment.

[0026] Figure 2 It is a structural schematic diagram of another view of an embodiment.

[0027] Figure 3 It is an enlarged view of the photographic paper output mechanism. Figure 1

[0028] Figure 4 It is an enlarged view of the photographic paper output mechanism.

[0029] ​Figure 5 is an exploded view of the Figure 4

[0030] Figure 6 is an enlarged view of another perspective of the paper feed swing lever in Figure 5

[0031] Figure 7 is an enlarged view of the combination of the rubber roller shaft and the limiting mechanism.

[0032] Figure 8 is an exploded view of the Figure 7

[0033] Figure 9 is a position diagram of the sliding block. DETAILED DESCRIPTION

[0034] The application will be further described in detail below with reference to the accompanying drawings.

[0035] As shown in Figure 1 , Figure 2 and Figure 3 , the thermal dye sublimation printer in the embodiment comprises a photo paper output mechanism, a rubber roller assembly 5a, a ribbon drive head 8a, a print head assembly 4a and a ribbon drive mechanism, and the rubber roller assembly 5a, the ribbon drive head 8a, the print head assembly 4a and the ribbon drive mechanism are all arranged on a base frame 1. The ribbon drive mechanism in the embodiment comprises an upper roller assembly 3a, a lower roller assembly 6a, a ribbon gear set 2a and a ribbon motor 1a. The ribbon motor 1a can simultaneously drive the upper roller assembly 3a, the lower roller assembly 6a and the ribbon drive head 8a to rotate through the ribbon gear set 2a, thereby being able to simultaneously drive the photo paper to advance and the ribbon to output. The front end bottom of the base frame 1 is also elastically provided with a paper supporting plate 7a, which is used to press the photo paper in a ribbon cartridge, so as to facilitate the paper feeding rubber roller to take out.

[0036] As shown in Figure 4 and Figure 5 , the photo paper output mechanism in the embodiment comprises a base frame 1, a paper feeding rubber roller 2, a paper feeding motor 4, a paper feeding swing lever 5, a transmission mechanism 6 and a sliding block 3,

[0037] The paper feeding rubber roller 2 is rotatably arranged on the base frame 1 and has a paper feeding gear 22 at one end, and the cross section of the paper feeding rubber roller 2 is in the shape of a sector; the central angle of the sector is an obtuse angle.

[0038] The paper feeding motor 4 is arranged on the base frame 1 and has a power output end; the power output end of the paper feeding motor 4 has a driving gear 41. The paper feeding swing lever 5 is swingably arranged on the base frame 1 through a support shaft part 52, and the bottom of the paper feeding swing lever has a flat matching part 51; the paper feeding swing lever 5 is provided with a clutch gear 7, which is in clutch connection with the paper feeding gear 22;

[0039] ​​​The transmission mechanism 6 is mounted on the base frame 1. The power input end of the transmission mechanism 6 is connected to the power output end of the paper feed motor 4. The power output end of the transmission mechanism 6 has an output gear 61, which meshes with the clutch gear 7. In this embodiment, the transmission mechanism 6 is a gear set, and the input gear of the gear set meshes with the driving gear 41.

[0040] The slider 3 is horizontally movable on the base frame 1 and has a rack portion 31 that meshes with the output gear 61 and a guide portion 32 that cooperates with the paper feed lever 5 on one side. The rack portion 31 meshes with the output gear 61, and the guide portion 32 includes a first guide portion 321 at a low position, a second guide portion 322 at a high position, and an inclined transition portion 323 in the length direction. The transition portion connects the first guide portion 321 and the second guide portion 322.

[0041] When the mating part 51 of the paper feed lever 5 is in contact with the first guide part 321, the clutch gear 7 meshes with the paper feed gear 22 for transmission; when the mating part 51 of the paper feed lever 5 is in contact with the second guide part 322, the paper feed lever 5 flips, causing the clutch gear 7 to disengage from the paper feed gear 22.

[0042] Combination Figure 5 As shown, a damping spring 71 is provided between the clutch gear 7 and the paper feed lever 5. When the slider 3 is in the retracted state, the clutch gear 7 can drive the paper feed lever 5 to rotate through the damping spring 71. Without the damping spring, when the output gear rotates, it will only drive the clutch gear to rotate, and cannot drive the lever to move at the same time, so the clutch cannot be engaged or disengaged.

[0043] The base frame 1 is equipped with a limiting mechanism. When the clutch gear 7 and the paper feed gear 22 are in a disengaged state, the paper feed roller 2 is restricted from continuing to rotate within the limiting mechanism. When the clutch gear 7 and the paper feed gear 22 are in a meshed state, the paper feed roller 2 can overcome the limiting mechanism and rotate.

[0044] Combination Figure 7 and Figure 8 As shown, the paper feed roller 2 is rotatably mounted on the base frame 1 via a roller shaft 21. A positioning pin 26 is provided on one side of the roller shaft 21. The limiting mechanism includes an elastic element 24 and a positioning block 25. The two ends of the elastic element 24 abut against the positioning block 25 and the base frame 1, respectively. The positioning block 25 has a limiting groove 251 that cooperates with the positioning pin 26. The port of the limiting groove 251 is flared, and the two sides form inclined surfaces for the positioning pin 26 to slide out or slide in. In this embodiment, the paper feed gear 22 extends axially with a sleeve 23, which is assembled on the roller shaft 21. The positioning pin 26 is formed on one side of the sleeve 23. The limiting mechanism can ensure the positioning of the paper feed roller without deviation, so as to avoid interference with the photographic paper. The sleeve, the paper feed gear, and the positioning pin are integrated into one piece, which is beneficial for manufacturing.

[0045] likeFigure 9 As shown, slider 3 moves through four positions: C, O, A, and B. Between positions O and C, a damping spring engages the clutch; when moving forward, the clutch gear meshes with the paper feed gear, and when moving backward, the clutch gear disengages from the paper feed gear. During the movement from position O to position B, whether moving forward or backward, the slider is forced through the paper feed lever, and the clutch gear engages with the paper feed gear.

[0046] The forward rotation of the paper feed motor drives the paper feed roller to rotate and the slider to move forward. The reverse rotation only drives the slider to move back to its original position. The position of the slider can be controlled by controlling the number of steps, without the need for an optical coupler to determine the position. This reduces manufacturing costs and ensures precise position control. At the same time, since the paper feed roller has a fan-shaped cross-section, the transmission power of the paper feed roller is interrupted during the slider's retraction, and it does not come into contact with the output photographic paper. Therefore, the photographic paper will not be carried back to the photographic paper slot of the ribbon. Compared with the existing lifting and lowering settings of the paper feed roller, the design is more flexible and simple, further reducing the risk of photographic paper getting stuck.

Claims

1. A photographic paper output mechanism, characterized in that... include Base frame (1); The paper feed roller (2) is rotatably mounted on the aforementioned base frame (1) and has a paper feed gear (22) at one end. The cross-section of the paper feed roller (2) is fan-shaped. The paper feed motor (4) is mounted on the aforementioned base frame (1) and has a power output end; The paper feed lever (5) is oscillatingly mounted on the aforementioned base frame (1). The paper feed lever (5) is equipped with a clutch gear (7), which can engage and disengage with the paper feed gear (22). A transmission mechanism (6) is mounted on the aforementioned base frame (1). The power input end of the transmission mechanism (6) is connected to the power output end of the aforementioned paper feed motor (4). The power output end of the transmission mechanism (6) has an output gear (61), which meshes with the aforementioned clutch gear (7). The slider (3) is horizontally movable on the aforementioned base frame (1) and has a rack portion (31) meshing with an output gear (61) on one side and a guide portion (32) cooperating with the paper feed lever (5); the aforementioned rack portion (31) meshes with the output gear (61), and the aforementioned guide portion (32) includes a first guide portion (321) at a low position, a second guide portion (322) at a high position and an inclined transition portion (323) in the length direction, and the transition portion (323) connects the aforementioned first guide portion (321) and second guide portion (322); When the aforementioned paper feed lever (5) is in contact with the first guide (321), the aforementioned clutch gear (7) meshes with the paper feed gear (22); when the aforementioned paper feed lever (5) is in contact with the second guide (322), the paper feed lever (5) flips and causes the clutch gear (7) to disengage from the paper feed gear (22).

2. The photographic paper output mechanism according to claim 1, characterized in that... The central angle of the sector is an obtuse angle.

3. The photographic paper output mechanism according to claim 1, characterized in that... The power output end of the paper feed motor (4) has a drive gear (41), and the transmission mechanism (6) is a gear set, the input gear of which meshes with the aforementioned drive gear (41).

4. The photographic paper output mechanism according to claim 1, characterized in that... A damping spring (71) is provided between the clutch gear (7) and the paper feed lever (5). When the slider (3) is in the retracted state, the clutch gear (7) can drive the paper feed lever (5) to flip through the damping spring (71).

5. The photographic paper output mechanism according to claim 1, characterized in that... The base frame (1) is provided with a limiting mechanism. When the clutch gear (7) and the paper feed gear (22) are in a separated state, the paper feed roller (2) is restricted from continuing to rotate within the aforementioned limiting mechanism. When the clutch gear (7) and the paper feed gear (22) are in a meshing state, the paper feed roller (2) can overcome the aforementioned limiting mechanism and rotate.

6. The photographic paper output mechanism according to claim 5, characterized in that... The paper feed roller (2) is rotatably mounted on the base frame (1) via the roller shaft (21). A positioning pin (26) is provided on one side of the roller shaft (21). The limiting mechanism includes an elastic element (24) and a positioning block (25). The two ends of the elastic element (24) abut against the positioning block (25) and the base frame (1) respectively. The positioning block (25) has a limiting groove (251) that cooperates with the positioning pin (26).

7. The photographic paper output mechanism according to claim 6, characterized in that... The port of the limiting groove (251) is flared and the two sides form inclined surfaces for the positioning pin (26) to slide out or slide in.

8. The photographic paper output mechanism according to claim 6, characterized in that... The paper feed gear (22) extends axially with a sleeve (23), which is mounted on the rubber roller shaft (21), and the positioning pin (26) is formed on one side of the sleeve (23).

9. The photographic paper output mechanism according to claim 8, characterized in that... The sleeve (23), paper feed gear (22) and positioning pin (26) are an integral piece.

10. A thermal sublimation printer having any one of the photo paper output mechanisms according to claims 1 to 9, characterized in that... It includes a photo paper output mechanism, a print head assembly (4a) and a ribbon drive mechanism, both of which are mounted on the base frame (1).

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