KR100214575B1 - Ink film tension device of cartridge for color video printer - Google Patents

Abstract

The present invention relates to an ink film tension device of a color video printer (CVP) cartridge. In the related art, a separate motor 29 is used to maintain the Tenshan of the ink film 13 of the cartridge 10, such that the structure is very complicated, thereby increasing the manufacturing cost of the product and lowering the productivity.

The present invention provides a cam gear 41 for driving a holder 5 having a thermal print head 3, a cam lever 42 for connecting the holder 5 and the cam gear 41, and a shaft 43. *) Pivotally coupled to the thermal print head sub-arm 43 and the platen roller 9, which are rotatably coupled to the holder 5 and the cam lever 42, and interlocked with each other. Bracket 45 is rotatably coupled to the center, the elastic body 46 for elastically supporting the bracket 45, and the rotation lever 47 is coaxially coupled to the bracket (45) And a two-stage gear 50 rotatably coupled to the fixed shaft 49 fixed to the reel bracket 48, and wherein the standby gear 50a is engaged with the supply reel 11 of the cartridge 10. It is fixed to the cam lever 42 by the shaft 51 and is composed of a latch 52 having a predetermined length engaged with the small gear 50b of the two-stage gear 49, so that an ink film without using a separate motor ( 13) keep the tension Reduce the production cost of the product to simplify the configuration by making and will have to improve productivity.

Description

Ink Film Tensioner for Color Video Printer Cartridge

1 is a block diagram showing a state in which a cartridge is mounted in a typical color video printer.

2a and b show cartridges of a typical color video printer.

2a is a bottom view.

2b is a front view.

3 is a front view showing an example of an ink film tensioning device of a color video printer cartridge according to the prior art.

Fig. 4 is a half sectional view showing the construction of an ink film tensioning device of a color video printer cartridge according to the prior art.

5 and 6 show the configuration and operation of the ink film tensioning apparatus of the color video printer cartridge according to the present invention.

5 is a side view of the holder in a raised state.

6 is a side view of the holder in a lowered state.

7A and 7B show the main components of the ink film tensioning apparatus of the color video printer cartridge according to the present invention.

7a is a plan view.

7b is a side view.

8a and b show the main components of the ink film tensioning apparatus of the color video printer cartridge according to the present invention.

8A is a plan view.

8b is a side view.

9 and 10 are side views showing an enlarged main constitution and action of the ink film tensioning apparatus of the color video printer cartridge according to the present invention.

* Explanation of symbols for main parts of the drawings

3: thermal print head 5: holder

41: cam gear 42: cam lever

43 ', 44, 49, 51: Axis 43: Thermal print head sub arm

45: brakit 46: elastic body

47: rotation lever 48: reel brakit

50: second gear 50a: standby gear

50b: Small gear 52: Latch

The present invention relates to an ink film tension device of a color video printer (CVP) cartridge, and in particular, to exclude the use of a separate motor for maintaining the tension of the ink film. The present invention relates to an ink film tensioning device of a color video printer cartridge, which makes it possible to further reduce the manufacturing cost and improve the productivity by simplifying the configuration.

Generally used color video printers, as shown in Figure 1, the cartridge storage guide (2) is formed in a predetermined internal portion of the main body 1, the thermal print head (TPH: Thermal Print Head) on one side (3) and the holder (5) to which the thermal print head sensor (4) is attached are rotatably installed around the hinge shaft (6), and the pinch roller (7) and the lower side of the cartridge storage guide (2). The grip roller 8 is in contact with a predetermined pressure, and a platen roller 9 is provided on the rear side thereof.

As shown in FIGS. 2A and 2B, the cartridge 10 accommodated in the cartridge accommodating guide 2 has a supply reel 11 and a winding reel 12 rotatably installed at both sides thereof. The ink film 13 is wound around the reel 11 and the winding reel 12, and the square hole 14 is formed in the bottom surface.

The ink film 13 is formed of three colors of yellow, magenta, and cyan, and initially the transparent portion 17 between the yellow portion 15 and the cyan portion 16. Is formed.

In the general color video printer as described above, the cartridge 10 is mounted on the cartridge storage guide 2 of the main body 1, and the photo paper 18 is supplied between the pinch roller 7 and the grip roller 8. In the state, as shown in FIG. 1, when the holder 5 is rotated counterclockwise about the hinge axis 6, the thermal print head sensor 4 causes the recreation film 13 of the cartridge 10 to be rotated. The transparent part 17 formed between the yellow part 15 and the cyan part 16 is detected among the three color parts of the yellow part 15, the magenta part, and the cyan part 16 formed on the yellow part. The stand by position is set so that 15 can be started.

At this time, as shown in FIG. 1, the ink film 13 is held by the holder 5 in the state of A, then descends to the state of A *, and is driven by the rotation of the pinch roller 7 ( 18).

After the completion of this printing operation, when the holder 5 is rotated clockwise about the hinge axis 6 to return to its original position, the ink film 13 in the state of A * is in the state of A Since the ink film 13 is caught by the cartridge storage guide 2 and is torn or damaged, it is impossible to obtain a good quality image.

In order to prevent such a phenomenon, when the holder 5 is returned, the ink film tension of the color video printer cartridge which imparts tension to the ink film 13 by rotating the supply reel 12 of the cartridge 10 back to a predetermined angle. As the device is known, an example of the typical ink film tension device will be described with reference to the accompanying drawings.

As shown in FIG. 3 and FIG. 4, the fixed shaft 22 is fixed to a fixed portion of the reel bracket 21, the elastic body 23 is fixed to the fixed shaft 22, and the gear portion (on the outer circumferential surface). The reel hub 25, the felt 26, and the reel body 27 having the 24 formed thereon are sequentially inserted, and the worm gear 28 meshes with the gear 24 of the reel hub 25, and the worm gear The worm 30 of the motor 29 meshes with the 28.

In the ink film tensioning device of the color video printer cartridge according to the related art, when the holder 5 is returned to its original position, the power of the motor 29 immediately becomes the worm 30 → the worm gear 28 → the reel hub ( 25 is transferred to the gear portion 24 → the felt 26 → the reel body 27 to rotate the hub 31 of the cartridge 10 at a predetermined angle to transfer the ink film 13 in the reverse direction. The ink film 13 maintains a predetermined tension.

However, the ink film tensioning device of the color video printer cartridge according to the prior art as described above is very complicated in structure, such as the use of a motor 29, which not only increases the manufacturing cost of the product but also decreases the productivity. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink film tensioning apparatus of a color video printer cartridge, which can simplify the configuration, reduce the manufacturing cost of the product, and improve the productivity by simplifying the configuration.

In order to achieve the object of the present invention as described above, a cam gear for driving a holder having a thermal frit head, a cam lever connecting the holder and the cam gear, rotatably coupled around the shaft, the holder And a thermal print head sub-arm linked to the cam lever, a bracket supporting the platen roller and rotatably coupled about an axis, an elastic body elastically supporting the bracket, and the bracket. A two-stage gear that is rotatably coupled to the shaft, a two-stage gear rotatably coupled to a fixed shaft fixed to the reel bracket, and the standby gear meshes with the supply reel of the cartridge; An ink film tensioning device of a color video printer cartridge, characterized in that it consists of a latch of a certain length engaged with a gear.

Hereinafter, an ink film tensioning apparatus of a color video printer cartridge according to the present invention will be described according to the embodiment shown in the accompanying drawings.

As shown in FIGS. 5 to 8, the holder 5 having the thermal print head 3 and the thermal print head sensor 4 attached to a predetermined portion of the main body rotates about the hinge axis 6. In the conventional color video printer which is installed as possible, the pinch roller 7 and the grip roller 8 are contacted with a predetermined pressure on one side thereof, and the platen roller 9 is provided on the rear side thereof. The ink film tensioning device of the color video printer cartridge is provided with a cam gear 41 for driving the holder 5, a cam lever 42 for connecting the holder 5 and the cam gear 41, and a shaft ( 43 *) is rotatably coupled to the thermal print head sub arm 43 and the platen roller 9 interlocked with the holder 5 and the cam lever 42. In addition to supporting the brackets 45 rotatably coupled around the shaft 44, the brackets 45 are burnt. Rotating to an elastic body 46, such as a tension coil spring to be supported independently, a pivoting lever 47 coaxially coupled to the bracket 45, and a fixed shaft 49 fixed to the reel bracket 48 The two-stage gear 50, which is coupled to the air gear 50a and is engaged with the cartridge 10 supply reel 11, is fixed to the cam lever 42 by the shaft 51 and the two-stage gear 49 It is comprised by the latch which is the gear part 52 of fixed length meshing with the small gear 50b of ().

The cam gear 41 of the cam gear 41 is formed with a cam 53, the guide pin 54 formed at one end of the cam lever 42 is guided.

The thermal print head sub-arm 43 has locking pins 55 and 56 formed on both sides thereof, respectively, and is inserted into guide holes 57 and 58 formed in the holder 6 and the cam lever 42, respectively. .

A support piece 59 is formed in the cam lever 42 so as to restrict the rotation of the rotation lever 47.

The latch 52, which is the gear portion, is preferably formed in a direction opposite to that of the small gear 50b of the second gear 50.

In the drawings, the same reference numerals are given to the same parts as the prior art configurations.

The effect of the ink film tensioning device of the color video printer cartridge according to the present invention configured as described above is as follows.

5 is a view in which the holder 5 is raised. When the cam gear 41 rotates clockwise in this state, the guide pin 54 of the cam lever 42 has a cam 53 having a small radius. Since the rotating lever 47 is rotated counterclockwise around the shaft 44 by the elastic restoring force of the elastic body 46, the cam lever 42 is moved to the left in the drawing.

At this time, the thermal print head sub-arm 43 is rotated clockwise about the axis 43 * by the movement of the cam lever 42, and the holder 5 is clockwise around the hinge axis 6. The ink film 13 of the cartridge 10 is rotated, and the printing operation as shown in FIG. 6 is performed by pressing the thermal print head 3 and the platen roller 9. .

Thereafter, after the printing operation is completed or when the holder 5 is returned to its original position to raise the thermal print head 3 to go to the stand-by mode, the supply reel 11 of the cartridge 10 By rotating the retracted ink film 13, the operation is as follows.

As shown in FIG. 7 and FIG. 9, when the cam lever 42 moves to the left side in the drawing by the above-described operation, the reel bracket 48 is moved by the left direction movement of the cam lever 42. The latch 52 fixed to the shaft 51 prevents the reverse rotation of the second gear 50 because its teeth are formed in opposite directions to the small gear 50b of the second gear 50. At the same time, the supply reel 11 pushes the ink ribbon 13 down while the thermal print head 3 descends, so that the supply reel 11 rotates slightly in the advancing direction of the latch 52.

On the other hand, when the print operation is completed or when returning to standby, when the cam gear 41 is rotated to move the cam lever 42 to the right side, the thermal print head sub arm 43 is centered on the shaft 43 *. At the same time, the holder 5 is rotated counterclockwise about the hinge axis 6.

In this case, as shown in FIGS. 8 and 10, the latch 52 also moves together with the cam lever 42, thereby rotating the second gear 50 clockwise. The air gear 50a of the 50 rotates the supply reel 11 of the cartridge 10 counterclockwise to rewind the ink ribbon 13 to maintain the tension of the ink film 13.

As described above, the ink film tensioning apparatus of the color video printer cartridge according to the present invention can keep the tension of the ink film constant at all times without using a separate driving motor, thereby reducing the manufacturing cost of the product by simplifying the configuration. In addition to this, there is an effect such as improving the productivity.

Claims (3)

Horizontally moved by a gear, the cab lever 42 for driving the print head, the gear portion 52 formed on one side of the cam lever, and a reel 11 rotatably installed on the reel bracket and mounted with the ink cartridge 11 And a two-stage gear (49) installed to be engaged with the gear unit (52) and the reel (11). The chem gear 41 driving the holder 5 having the thermal print head 3, the cam lever 42 connecting the holder 5 and the cam gear 41, and the shaft 43 ' It is rotatably coupled to the center, and supports the thermal print head sub-arm 43 and the platen roller 9, which are interlocked with the holder 5 and the cam lever 42, and is centered about the shaft 44. Bracket 45 that is rotatably coupled, an elastic body 46 that elastically supports the bracket 45, a rotation lever 47 that is coaxially coupled to the bracket 45, and a reel; A two-stage gear (50) rotatably coupled to the fixed shaft (49) fixed to the bracket (48), and the standby gear (50a) engaged with the supply reel (11) of the cartridge (10), and the cam lever ( 42 is fixed to the shaft 51 and the ink film tensioning device of the color video printer cartridge, characterized in that the gear portion 52 of a predetermined length that is engaged with the small gear (50b) of the second gear (49). . According to claim 2, The thermal print head sub-arm (43) is formed with engaging pins 55 and 56 on both sides, respectively, guide holes 57 and 58 formed in the holder 6 and the cam lever 42 Ink film tensioning device of a color video printer cartridge, characterized in that inserted into each).