KR102047525B1 - Photo printer with line type spring - Google Patents

Abstract

The present invention relates to a photo printer, and more particularly, to a photo printer in which printing quality is improved by being able to elastically press the left and right of the head at a uniform pressure.
A photo printer according to the present invention is a photo printer which prints an image or text by applying heat of a predetermined temperature to a paper expressing color in response to a heat, comprising: a frame having both side walls formed thereon; A paper storage unit provided between both side walls of the frame and accommodating the paper; A pickup roller which protrudes from the bottom surface of the paper storage part and forwards the received paper; A platen roller coupled to the frame to discharge paper fed by the pickup roller forward; A swing bracket hinged to both side walls of the frame; A head fixed to the swing bracket and applying heat to the paper at an upper portion of the platen roller; A pressing plate provided at an upper portion of the head and fixed to both side walls of the frame; And a spring provided between the pressing plate and the head.

Description

Photo printer with head press structure using linear spring {PHOTO PRINTER WITH LINE TYPE SPRING}

The present invention relates to a photo printer, and more particularly, to a photo printer in which printing quality is improved by being able to elastically press the left and right of the head at a uniform pressure.

The performance of cameras mounted on smart devices such as smartphones is approaching that of general digital cameras, and the population that captures memories by taking pictures with smart devices that are always easier to carry than digital cameras is increasing. As a result, consumers' desire to take photographs and print them immediately without any conversion is growing.

Reflecting such demands from consumers, photo printer products that can print pictures in a smartphone anytime and anywhere have been disclosed.

Although there are many types of such photo printers, there is disclosed a photo printer in which a printing paper employing a zero ink method is applied, so that no additional ink or a cartridge is required and thus a maintenance cost is low. Here, the zero ink method refers to a method in which a color corresponding to a cartridge is included in the paper to express colors using only heat. In other words, dyes expressing color in response to heat are stacked on paper to print an image (photo) or text by controlling the heating temperature or heating time of the head.

1 to 3 show a conventional photo printer 1. As shown, the conventional photo printer 100 includes a paper storage unit 110, a pickup roller (R1) and platen roller (R2), a head, a swing bracket 150 and a pressing means 160. .

The paper storage unit 110 is formed with a space 111 for stacking a plurality of sheets are accommodated, the frame 115 extending to the front side is coupled to the lower portion of the paper storage unit 110, the number of sheets Forming and combining the payment unit 110 and the frame 115 separately is for ease of manufacture and may be formed integrally.

The pickup roller R1 is a component that protrudes on the bottom surface of the paper storage unit 110 and forwards the paper located at the lowermost portion of the stacked paper.

On the other hand, there is provided a paper pressing member 120 for elastically pressing the paper laminated in the space 111, the paper pressing member 120 is coupled to the upper surface of the side wall of the paper storage unit 110 It is provided to be inclined downward toward the pickup roller to press the paper downward. As such, when the paper is pressed, the friction force between the paper and the pickup roller R1 increases, and when the pickup roller R1 rotates, the paper positioned at the bottom of the paper is smoothly fed forward.

Platen roller (R2) is a component for discharging the paper supplied by the pickup roller (R1) to the front, the rotating shaft is coupled to the frame (115).

The head 140 is provided on the platen roller R2, and the head 140 prints an image or text by expressing a color corresponding to the temperature by applying heat of a predetermined temperature to the paper. A ceramic plate (not shown) is provided on the top of the head 140, and a heat sink 141 made of metal is provided on the ceramic plate.

It also includes a PCB 142 for controlling the heating temperature or heating time of the head 140. That is, the head 140 and the PCB 142 are attached to the lower surface of the heat sink 141.

The paper enters between the head 140 and the platen roller R2. In particular, the head 140 is rotatably mounted instead of being fixed to the paper storage 110. Specifically, the head 140 Is coupled to the mounting portion 151 formed on the front side of the swing bracket 150.

In addition, when the paper enters between the head 140 and the platen roller R2, the rear side of the swing bracket 150 is the number of sheets so that the distance between the head 140 and the platen roller R2 is extended. A hinge hole 152 is formed as a coupling part coupled to the pivot shaft 113 formed on the sidewall of the lead part 110.

In addition, the head 140 is in close contact with the paper transfer heat, in this way is provided with a pressing means 160 for pressing the head 140 downward in order to contact the head 140 to the paper. The pressing means 160 is a pressing portion 161 for pressing the upper portion of the head 140, and the coupling portion for rotating the pressing portion 161 coaxially with the rotation shaft 113 of the swing bracket 150 Hinge hole 162 is formed.

On the other hand, the head 140 is pressed downward by the pressing means 160, but a constant distance must be maintained between the platen roller R2 and the head 140 so that paper can enter. To this end, a stopper 114 protrudes from the top of the frame 115, and correspondingly, the mounting portion 151 of the swing bracket 150 on which the head 140 is mounted is caught by the stopper 114 and lowered further. Locking jaw 153 is formed to prevent it.

As shown in Figure 4 and 5, the swing bracket 150 and the pressing means 160 is provided to swing around the pivot shaft 113 provided on both side walls of the paper storage unit 110.

In addition, the elastic member S is provided to elastically pull the pressing portion 161 formed in the pressing means 160, one side of the elastic member (S) is a connecting portion 163 formed in the pressing portion 161. The other side of the elastic member (S) is connected to and fixed to the connecting portion (115a) formed at the tip of the frame (115).

On the other hand, the pressing projection 164 is formed on the lower surface of the pressing portion 161. As a result, the pressurizing part 161 and the heat dissipation plate 141 are in point contact by the pressurizing protrusion 164, and the pressurizing part 161 presses the heat dissipation plate 141 downward in this state. For reference, the head 140 is coupled to the lower portion of the heat sink 141, and as a result, the head 140 is elastically pressed toward the platen roller R2 by the pressing unit 161.

The conventional photo printer configured as described above is provided with coil springs on both sides as elastic members S for pressing the pressing means 160 downward. However, the elastic modulus of the pair of coil springs may be changed due to some cause during use, and in this case, if the pressing force acting on the left and right sides of the head is different, the print quality is deteriorated, such as color deviation in the left and right sides of the picture. There is.

In addition, mechanically, the coil springs pulling the left and right sides of the head occupy a large area, thereby limiting various designs.

No. 10-2016-116966

The present invention has been made to solve the above-described problems, an object of the present invention to provide a head pressing structure of a photo printer capable of pressing the head downward stably.

Another object of the present invention is to provide a photo printer that is capable of elastically pressing the left and right of the head at a uniform pressure to improve the print quality.

In order to solve the above technical problem, a photo printer according to the present invention includes a photo printer for printing an image or text by applying heat of a predetermined temperature to a paper expressing color in response to heat, the frame having both side walls formed thereon; A paper storage unit provided between both side walls of the frame and accommodating the paper; A pickup roller which protrudes on the bottom surface of the paper storage part and supplies the paper accommodated forward; A platen roller coupled to the frame to discharge paper fed by the pickup roller forward; A swing bracket hinged to both side walls of the frame; A head fixed to the swing bracket and applying heat to the paper at an upper portion of the platen roller; A pressing plate provided at an upper portion of the head and fixed to both side walls of the frame; And a spring provided between the pressing plate and the head.

In addition, the spring is preferably a linear spring bent to form two tangent points in contact with the head, one tangent point in contact with the pressing plate is formed.

In addition, it is preferable that a long groove is formed on the upper surface of the head so that the point of contact of the linear spring is seated.

According to the present invention, there is an effect that can stably press the head downward.

In particular, the left and right of the head can be elastically pressed at a uniform pressure to improve the print quality.

1 to 5 show a conventional photo printer.
6 to 8 show a photo printer according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment according to the present invention.

6 to 8 show an embodiment (1) of a photo printer according to the present invention. As shown in the drawing, the frame 10 includes a paper storage unit 11, a pickup roller, a platen roller, and a drive system.

The paper storage unit 11 is provided between both side walls of the frame 10, and a space for accommodating the paper is formed.

The pickup roller (refer to 'R1' in FIG. 2) is a component that protrudes to the bottom surface of the paper storage unit 11 and feeds the received paper forward.

The platen roller (refer to 'R2' in FIG. 2) is a component coupled to the frame 10 to discharge paper fed by the pickup roller forward.

A drive system for rotating the platen roller and the pickup roller is provided, and the drive system includes a motor for providing a driving force, and a plurality of gears for reducing the rotational force of the motor and transmitting the deceleration force to the platen roller and the pickup roller.

In addition, the upper portion of the platen roller is provided with a swing bracket 30 is rotatably coupled. The swing bracket 30 is hinged to the hinge pin (h) provided on each side wall of the frame 10, the head 40 is to be fixed to the swing bracket (30).

Therefore, the head 40 is also swingably coupled to the platen roller.

On the other hand, one side of the head 40 is screwed to the swing bracket 30, the other side is to be exposed without being covered by the swing bracket (30).

In addition, the head 40 is formed with a long groove 41 in a direction perpendicular to the advancing direction of the paper.

In addition, the front side of the swing bracket 30 is provided with a pressing plate 60 in parallel. The swing bracket 60 is configured to be swingable by a hinge pin h, but the pressing plate 60 is screwed to both side walls of the frame 10 to be fixedly installed.

In particular, a linear spring 50 is provided between the pressing plate 60 and the head 40. In the present embodiment, the linear spring 50 is a bar type having a circular cross section. However, it can be seen that two tangent points 52 and 53 in contact with the head 40 are formed and bent to form one tangent point 51 in contact with the pressure plate 60. However, according to the present invention, the linear spring may be formed in an ellipse or polygon instead of a circle.

In addition, two bullet points 52 and 53 in contact with the head 40 may be positioned by being seated in the long groove 41.

In addition, the point of contact 51 in contact with the pressing plate 60 should be installed so as to be located in the center of the left and right directions of the head 40 can be pressed with a uniform elastic force on the left and right.

Hereinafter, the assembly process of the embodiment (1) according to the present invention.

First, the paper storage unit 11 is coupled to the frame 10. A pickup roller is coupled to the paper storage unit 11 so as to protrude, and a platen roller is axially coupled to the frame 10.

Next, the head 40 is coupled to the swing bracket 30, and the swing bracket 30 is hinged to the frame 10 so as to be swingable.

Next, the pressing plate 60 is fixed to the frame 10 in a state where the linear spring 50 is seated in the long groove 41 of the head 40.

Therefore, the linear spring 50 provided between the pressing plate 60 and the head 40 will always press the head downwardly and evenly.

1: Example
10: frame
11: paper storage
20: drive system
30: Swing Bracket
40: head
41: long groove
50: linear spring
51,52,53: Tanji
60: pressurized plate

Claims (2)

A frame on which both side walls are formed;
A paper storage unit provided between both side walls of the frame and having a pickup roller protruding from a bottom surface thereof;
A platen roller coupled to the frame to discharge paper fed by the pickup roller forward;
Swing brackets hinged at both ends of both sides of the frame;
A head fixed to a bottom surface of the swing bracket on one side of an upper surface and having a long groove formed in a direction orthogonal to a traveling direction of the paper on the other side of the upper surface;
A pressing plate provided at an upper portion of the head and fixed to both side walls of the frame; And
Includes between the pressing plate and the head and the linear spring bent in the center;
Both ends of the linear spring is seated in the long groove and the point contact,
And the bent center of the linear spring is in point contact with the pressure plate.

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