KR200392157Y1 - Ink ribbon cassete in printer - Google Patents

Abstract

Disclosed is a printing ink cartridge cassette which can be used for typewriter check printing and the like and can maintain a tensile force. The printing machine ink ribbon cassette includes a case of a printing machine ribbon cassette, a ribbon core rotatably coupled to the case, a winding core for winding a ribbon released from the ribbon core, a winding core driving unit for rotating the winding core, and tensioning the ribbon. And a tension device and a brake device that unlocks the ribbon core at a load greater than the load applied by the tension spring to the ribbon. Therefore, the tensile force of the ribbon can be kept constant, so that accurate printing is possible.

Description

Printing machine ink ribbon cassette {INK RIBBON CASSETE IN PRINTER}

The present invention relates to a printing machine ink ribbon cassette, and in particular, to a printing machine ink ribbon cassette to maintain the tensile force of the ribbon, despite the use of a simple structure, to enable accurate printing.

Printing machine The ink ribbon cassette is a consumable that is detachably coupled to a typewriter, a check printing machine, and the like, so that a ribbon coated with ink is wound around the printing machine so that printing can be performed continuously.

1 is a perspective view showing the structure of a conventional printing machine ink ribbon cassette, Figure 2 is a plan view of FIG.

As shown in the drawing, a conventional printing machine ink ribbon cassette has a lower case 10, an upper case (not shown) coupled to face the lower case, and an accommodation space formed by combining the upper case and the lower case 10. It is composed of a ribbon core 20, a winding core 50, a winding roller 40 which is installed to be rotatable.

The ribbon is wound around the ribbon core 20, and the ribbon released from the ribbon core 20 is wound around the winding core 50 via the outside. The winding roller 40 is driven around the winding core 50 so that the winding core 50 rotates. On the other hand, in order for the winding roller 40 to rotate the winding core 50, the winding core 50 should be brought into contact with the winding core 40 with a predetermined or more contact pressure. In order to perform this function, a pressure mechanism 60 is provided.

The pressure mechanism 60, the one end is hinged to the lower case 10, the other end of the pressure lever 62 is coupled to the winding core 50, one end is fixed to the lower case 10 and the other end is the pressure lever ( 62 is connected to the winding core 50 is composed of a tension spring 61 to be pressed against the winding roller (40).

And in order to keep a ribbon in tension, the tension spring 30 is provided. The tension spring 30 supports the lower case 10 at one end and the other end of the ribbon while the center is wound on the ribbon core 20.

As described above, the conventional printing machine ink ribbon cassette can be wound around the winding core 50 after printing by unwinding the ribbon wound on the ribbon core 20 while maintaining a proper tension force by the tension spring 30. .

However, in the conventional printing machine ink ribbon cassette, there is a concern that the ribbon core 20 may rotate by a load applied by the tension spring 30 after the winding roller 40 stops driving. When the ribbon core 20 is rotated further, the tension force applied to the ribbon is weakened as a result, and the tensile force of the ribbon exposed to the outside is weakened. Therefore, the correct character may not be printed at the time of printing, and the winding roller 40 may not rotate the correct length, resulting in a problem that some of the letters may not be printed due to duplicate printing on the printed ribbon.

In order to solve this problem, it is necessary to accurately adjust the tension force of the tension spring 30 so that the ribbon core 20 does not rotate when only the load applied by the tension spring 30 is applied. However, such fine adjustment is not only high in fear of defects, but also requires a skilled manual operation, which increases the manufacturing cost.

The present invention has been made to solve the above problems, it is an object of the present invention to provide a printing machine ink ribbon cassette to maintain the tensile force of the ribbon, despite the use of a simple structure, to accurately print.

The present invention, in order to achieve the object described above, the case of the printing ribbon cassette, the ribbon core coupled to the case rotatably, the winding core for winding the ribbon released from the ribbon core, and the winding core is rotated And a winding core drive unit, a tension spring for applying tension to the ribbon, and a brake device for unlocking the ribbon core at a load greater than the load applied by the tension spring to the ribbon. Therefore, the tension of the ribbon is maintained, so that accurate printing can be achieved.

Here, the brake device preferably includes a plurality of engaging projections formed on the inner diameter of the ribbon core and the brake lever coupled to the case so as to be located on the inner diameter of the ribbon core, the brake lever formed to engage the engaging projections. Thus, in spite of applying a simple structure, it is possible to maintain the tension of the ribbon described above.

In addition, it is effective that the take-up core drive unit includes a take-up roller driven externally to the take-up core, and a contact spring for pressing the take-up core to the take-up roller.

In addition, it is effective to further include a ribbon core friction preventing rib formed to protrude from the case facing the ribbon core. Therefore, the frictional force during the rotation of the ribbon core is reduced, so that the ribbon core can be easily driven.

In addition, the ribbon core friction preventing rib is preferably formed in the shape of a semi-circular cross section.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in describing the present invention, a detailed description of a known function or configuration will be omitted so as not to disturb the gist of the present invention.

Figure 3 is a perspective view of an ink ribbon cassette of an embodiment of the present invention, Figure 4 is a plan view of Figure 3, Figure 5 is a perspective view of the lower case of Figure 3.

As shown in these drawings, the ink ribbon cassette of one embodiment of the present invention is coupled to the lower case 110, the lower case 110 and the upper case combined with the lower case 110 to form a receiving space (Not shown), the ribbon core 120 is installed in the receiving space and the ribbon 101 is wound, the winding core 150 winding the ribbon released from the ribbon core 120, and the winding core 150 Winding core drives 140 and 160 for driving, a tension spring 130 for applying a constant tension to the ribbon 101, and brake devices 122 and 170 for preventing the rotation of the ribbon core 120 when the tension is below a certain tension. It is composed.

The lower case 110 includes a bottom plate 111 and a side plate 112 formed outside the bottom plate 111. The overall shape of the lower case 110 is formed so that the portion provided with the outer pulley (115, 116) for supporting the ribbon 101 is exposed to the outside. A plurality of posts protrude from the bottom plate 111. At the position where the ribbon core post 113 protruding at the position where the ribbon core 120 is installed, the winding roller post 118 protruding at the position where the winding roller 140 is installed, and the pressure spring 160 are installed. Protruding contact spring post 119, tension spring post 114, the tension spring 130 is installed, guide posts (117a, 117b) for guiding the ribbon, and for coupling with the upper case (not shown) It is composed of a coupling post 112a. The lower portion of the tension spring post 114 is spaced apart from the tension spring post 114 and the tension spring support wall 114a protrudes.

The side plate 112 is opened in a portion where the outer pulleys 115 and 116 are installed so that the ribbon can enter and exit. The outer pulleys 115 and 116 may include a first outer pulley 115 supporting the ribbon 101 drawn out of the case from the ribbon core 120 and a ribbon drawn toward the winding core 150 from the outside of the case. It consists of a supporting second outer pulley 116.

The ribbon core post 113 has a hollow in which the brake lever member 170 is mounted at the center thereof, and a cutout 113a is formed at one surface thereof such that the lever 172 of the brake lever member 170 can protrude. On the other hand, at the lower end of the ribbon core post 113, the gap holding portion 113b is formed with a diameter larger than that of the ribbon core post 113. The space maintaining part 113b comes into contact with the center of the ribbon core 120 and serves as a guide when the ribbon core 120 is rotated, so that the space between the outer surface of the ribbon core post 113 and the center of the ribbon core 120. Keep the sides evenly spaced.

Guide posts 117a and 117b are formed between the lead-out guide post 117b formed between the ribbon core 120 and the first outer pulley 115, and between the second outer pulley 116 and the winding core 150. It consists of the pull-in side guide post 117a which becomes. The lead-out guide post 117b is formed to intermediately support the ribbon supported by the ribbon core 120 and the first outer pulley 115. The retraction side guide post 117a is formed to intermediately support the ribbon supported by the winding core 150 and the second outer pulley 116.

A plurality of coupling posts 112a are formed along the outer circumference of the bottom plate 111, and a coupling post in which a hollow is formed in the center of the upper case (not shown) may be inserted into the coupling case 112a.

Ribbon core friction preventing ribs 111a are formed on the bottom plate 111 around the ribbon core post 113, and winding core friction preventing ribs 111b are formed on the bottom plate 111 on the movement path of the winding core 150. It protrudes and is formed. The ribbon core friction preventing rib 111a is formed to protrude radially about the ribbon core post 113. The ribbon core anti-friction rib 111a prevents the bottom plate 111 and the ribbon 101 from directly contacting each other when the ribbon core around which the ribbon is wound rotates to increase the friction force. The ribbon core anti-friction rib 111a is preferably formed in a semi-circular arc shape in cross section for smooth contact with the ribbon 101.

Several winding core friction preventing ribs 111b are formed side by side along the trajectory of the winding core 150 by the contact spring 160. That is, the pressure spring post 119 is formed in an arc shape. Winding core friction preventing rib (111b) also has the effect of reducing the friction caused by the contact of the bottom plate 111 and the ribbon 101 when the winding core 150 is moved. The winding core friction preventing rib 111b is preferably formed in a semi-circular arc shape in cross section for smooth contact with the ribbon 101.

The ribbon core 120 is formed in a cylindrical shape, and a plurality of locking protrusions 122 protrude from the inner diameter. The size of the inner diameter of the ribbon core 120 is slightly larger than the size of the gap maintaining portion 113b. Therefore, the ribbon core 120 rotates while the gap maintaining part 113b is inserted into the inner diameter of the ribbon core 120.

6 is a perspective view illustrating the tension spring of FIG. 3.

The tension spring 130 is formed of a torsion spring composed of a spring part 131 formed by winding a spring member at the center, a case support arm 132 and a ribbon support arm 133 formed at both ends of the spring part 131. do. The ribbon contact portion 134 is bent at the end of the ribbon support arm 133. The spring 131 is inserted into and coupled to the tension spring post 114, the case support arm 132 is supported by the tension spring support wall 114a, and the ribbon contact part 134 is not coated with ink on the ribbon. Are coupled to be supported. Accordingly, the ribbon contact portion 134 of the tension spring 130 applies a load to the ribbon so that a constant tension is applied to the ribbon located between the ribbon core 120 and the winding core 150.

Winding core 150 is formed in a wheel shape, the coupling hole 151 for coupling with the contact spring 160 is formed in the center, the outer peripheral surface is formed with irregularities.

The winding core driving units 140 and 160 include a winding roller 140 for driving the winding core 150, and a contact spring 160 for pressing the winding core 150 toward the winding roller 140.

As shown in FIG. 8, the contact spring 160 includes a spring part 161 formed by winding a spring member at a center thereof, a case support arm 162 and a core support arm formed at both ends of the spring part 161. 163 is formed of a torsion spring. The core coupling portion 164 is bent at the end of the core support arm 163. The core coupling part 164 is inserted into and coupled to the coupling hole 151 of the winding core 150, and the case support arm 132 is supported by the side plate 112 to wind the winding core 150 to the winding roller 140. Press it toward.

The winding roller 140 is formed in a cylindrical shape, and gears are formed on the outer circumferential surface of the winding core 150. The gear is formed in a triangular shape with a sharp end and does not slip on a ribbon wound around the winding core 150, and may rotate the winding core 150. The winding roller 140 is coupled to the winding roller post 118.

The brake devices 122 and 170 include a brake lever member 170 inserted into and coupled to a ribbon core post, and a locking protrusion 122 formed on the ribbon core 120 described above.

The brake lever member 170 illustrated in FIG. 7 includes a post coupling portion 171 inserted into the hollow of the ribbon core post 113 and a brake lever 172 protruding from the side of the post coupling portion 171. . The post coupling portion 171 is formed in a cross shape, and the brake lever 172 is formed in a thin plate shape. The brake lever member 170 has a brake lever 172 inserted into the cutout 113a, and a post coupling part 171 is inserted into the hollow of the ribbon core post 113 to be coupled to the ribbon core post. In the coupled state, the end of the brake lever 172 protrudes slightly more than the outer diameter of the gap holding portion 113b, so that the brake lever 172 is formed to be inserted between the engaging protrusions 122 of the ribbon core 120. desirable.

The strength of the brake lever 172 is that the ribbon core 120 does not rotate due to the load applied by the tension spring 130 to the ribbon 101, and when the greater load is applied, the ribbon core 120 rotates. It should be formed so that it can That is, when driving the winding roller 140 to wind the ribbon, the brake lever 172 moves between the engaging protrusions 122, and in the state where the winding roller 140 is not driven and stopped by the tension spring 130. With respect to the load applied, the brake lever 172 is caught by the locking protrusion 122 so that the ribbon core 120 does not rotate.

Hereinafter, the assembly method and operation of an embodiment of the present invention will be described in detail.

As described above, the brake lever member 170 is coupled to the ribbon core post 113, and then the ribbon core 120 is inserted into the ribbon core post 113. Then, the tension spring 130 is inserted into and coupled to the tension spring post 114, and the winding roller 140 is coupled to the winding roller post 118. After the core coupling portion 164 of the contact spring 160 is inserted into the coupling hole 151 of the winding core 150 to be coupled, the contact spring 160 is coupled to the contact spring post 119.

Then, one end of the ribbon 101 in the ribbon core 120 is connected to the ribbon contact portion 134, the lead-out guide post 117b, the first outer pulley 115, the second outer pulley 116, and the lead-in guide side. It attaches to the winding core 150 via 117a. At this time, the surface where the ribbon contact portion 134, the lead-out guide post 117b, the first outer pulley 115, the second outer pulley 116 and the lead-in guide guide 117a is not coated with ink Be sure to

Then, the upper case (not shown) is coupled to the lower case 110 to complete the coupling.

After printing, when the winding roller 140 is driven to move the ribbon, the winding core 150 rotates, and the load applied to the ribbon 101 is greater than the threshold values of the brake devices 122 and 170. The ribbon core 120 rotates and the ribbon is released.

Then, after moving the ribbon by a predetermined value or more, when the driving of the winding roller 140 is stopped, the tension spring 130 applies a load to the ribbon 101 so that the ribbon 101 exposed to the outside has a constant tensile force. This can prevent the ribbon from being wrinkled.

At this time, since the brake devices 122 and 170 prevent the ribbon core 120 from rotating under the load applied by the tension spring 130, the ribbon core 120 is excessively rotated to release the ribbon, thereby exposing the ribbon to the outside ( It is possible to prevent the tension applied to 102 from weakening. Therefore, the state which can print again is completed.

According to the embodiment of the present invention as described above it can be expected a variety of effects, including the following. However, the present invention is not achieved only if all of the following effects.

First, by the brake device and the tension spring according to the present invention, it is possible to maintain the tensile force of the ribbon at the time of printing, accurate printing is possible.

In addition, by implementing the brake device and the tension spring using a simple structure, there is an advantage that the manufacturing is easy, and as a result the manufacturing cost can be reduced.

And, by providing a ribbon core friction preventing rib, it is possible to reduce the friction force generated when the ribbon core is rotated. Accordingly, there is an advantage that can reduce the load of the drive device.

In the above described a preferred embodiment of the present invention by way of example, the scope of the present invention is not limited only to this specific embodiment, it can be changed appropriately within the scope described in the claims.

1 is a perspective view of a conventional printing machine ink ribbon cassette

2 is a plan view of the printing machine ink ribbon cassette of FIG.

Figure 3 is a perspective view of the printing machine ink ribbon cassette of an embodiment of the present invention

4 is a plan view of the printing machine ink ribbon cassette of FIG.

5 is a perspective view of the lower case of FIG.

6 is a perspective view of the tension spring of FIG.

FIG. 7 is a perspective view of the brake lever member of FIG. 3. FIG.

8 is a perspective view of the pressure spring of FIG.

** Description of the symbols for the main parts of the drawings **

101: ribbon 110: lower case

111a: Ribbon core friction preventing rib 111b: Winding core friction preventing rib

113: ribbon core post 113a: incision

120: ribbon core 130: tension spring

131: spring portion 132: case support arm

133: ribbon support arm 134: ribbon contact portion

140: winding roller 150: winding core

160: pressure spring 170: brake lever member

171: post coupling portion 172: brake lever

Claims (15)

A case of printing machine ribbon cassette; A ribbon core rotatably coupled to the case; A winding core winding the ribbon released from the ribbon core; A winding core driver for rotating the winding core; A tension spring for applying tension to the ribbon; And A brake device that unlocks the ribbon core at a load greater than the load applied by the tension spring to the ribbon; Printing machine ink ribbon cassette comprising a. The method of claim 1, The brake device, A plurality of locking protrusions formed on an inner diameter of the ribbon core; And A brake lever coupled to the case so as to be positioned at an inner diameter of the ribbon core and formed to be caught by the locking protrusion; Printing machine ink ribbon cassette comprising a. The method of claim 2, A ribbon core post protruding from the case to be inserted into an inner diameter of the ribbon core; More, And the brake lever is coupled to the ribbon core post. The method of claim 3, wherein The ribbon core post is hollow is formed in the center, the incision is formed so as to penetrate the hollow on one surface facing the inner diameter of the ribbon core, The brake lever is inserted into the incision, A post coupling part integrally formed with the brake lever and inserted into the hollow; Ink ribbon cassette further comprises a. A case of printing machine ribbon cassette; A space maintaining portion protruding in a cylindrical shape from the case; A ribbon core post having a diameter smaller than that of the gap retaining portion, protruding from the gap maintaining portion, and having a hollow formed at a center thereof, and having a cutout portion penetrating the hollow at a side thereof; A ribbon core having an inner diameter larger than an outer diameter of the gap holding part, and having a plurality of locking protrusions formed therein, the ribbon core being inserted into the gap holding part and rotating; A brake lever member including a post coupling part inserted into the hollow of the ribbon core post, and a brake lever integrally formed with the post coupling part and inserted into a cutout of the ribbon core post so that an end thereof is caught by the locking protrusion; A winding core winding the ribbon released from the ribbon core; A winding core driver for rotating the winding core; And A tension spring for applying tension to the ribbon; Printing machine ink ribbon cassette comprising a. The method according to any one of claims 1 to 5, The winding core drive unit, A winding roller which is driven outside the winding core; And A contact spring for pressing the winding core to the winding roller; Printing machine ink ribbon cassette comprising a. The method of claim 6, The winding roller, Printing machine ink ribbon cassette, characterized in that the cog wheel is formed on the surface in contact with the winding core. The method of claim 7, wherein The cogwheel is a printing ink ribbon cassette, characterized in that the teeth are formed in a triangle. The method of claim 6, The pressure spring is, A spring portion wound in a circular shape; A case support arm connected to one end of the spring part and supported by the case; And A core support arm connected to the other end of the spring part and having an end coupled to the winding core; Printing machine ink ribbon cassette comprising a. The method according to any one of claims 1 to 5, The tension spring, A spring portion wound in a circular shape; A case support arm connected to one end of the spring part and supported by the case; And A ribbon support arm connected to the other end of the spring portion and installed at an end thereof to support a ribbon released from the ribbon core; Printing machine ink ribbon cassette comprising a. The method according to any one of claims 1 to 5, A ribbon core friction preventing rib formed to protrude from the case facing the ribbon core; Printing machine ink ribbon cassette further comprises a. The method of claim 11, The ribbon core friction preventing rib is a printing ink ribbon cassette, characterized in that formed radially around the ribbon core. The method of claim 11, The ribbon core friction preventing rib is a printing ink cartridge cassette, characterized in that the cross-sectional shape is formed in a semi-circular arc shape. The method according to any one of claims 1 to 5, Winding core friction preventing ribs protruding from the case on a trajectory on which the winding core moves; Printing machine ink ribbon cassette further comprises a. The method of claim 14, The winding core friction preventing rib is a printing ink ribbon cassette, characterized in that the cross-sectional shape is formed in a semi-circular arc shape.