JP2016171968A - Drawing device and drawing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawing device and a drawing method of the drawing device capable of improving nail area detection accuracy with a simple configuration.SOLUTION: A drawing device for performing drawing on a nail T of a finger U1 includes a nail area detection part for detecting an area of the nail T in the finger as a nail area based on an image acquired by photographing a masking part M which is formed by applying a masking agent to an area adjacent to the nail T of the finger.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a drawing apparatus and a drawing method of the drawing apparatus.

2. Description of the Related Art Conventionally, a drawing apparatus that draws a nail design on a nail is known (for example, see Patent Document 1).
If such an apparatus is used, a nail design can be easily enjoyed without using a nail salon or the like.

By the way, when drawing a nail design with a drawing apparatus, a desired nail design is drawn on a nail by performing a plurality of processes such as application of a base, drawing of a design, and application of a top coat. At this time, it is also assumed that a finger is inserted / removed from / to the drawing apparatus between each process, for example, for drying the drawn ink.
Thus, when repeatedly extracting and inserting a finger from the drawing apparatus between the processes, it is difficult to fix the nail at the same position between the processes.
Therefore, each time a finger is inserted into the device, the nail region is detected, the relative position between the nail and the device is measured, and drawing is performed while correcting the drawing data according to the result. It is necessary to prevent the drawing position from shifting between processes.

In addition, even if a mechanism for drying the ink drawn on the nail is provided in the apparatus so that it is not necessary to insert and remove the finger between steps, the finger moves while the ink is being dried. There is also a risk.
For this reason, even in the case of an apparatus configuration in which nail printing is possible without drawing / inserting a finger from the start to the end of drawing, it is necessary to detect the nail region as appropriate when moving to the next drawing process after the end of drying.

Special table 2003-534083 gazette

However, in the state where the drawing process has progressed and the design is drawn on the nail, the nail region is different from the initial state nail region detected before the start of drawing due to the drawn design etc. In some cases, the detection accuracy of the nail region is lowered, such as being detected.
As described above, when a deviation occurs in the range detected as the nail region, drawing is performed in a region other than the nail in the drawing process after the detection, and the finger may be stained.
In addition, if a range that differs between the respective steps is detected as a nail region, the design to be drawn may deviate from the position to be originally drawn, and a beautiful finish may not be obtained.

  An object of the present invention is to provide a drawing apparatus and a drawing method of the drawing apparatus that can improve the detection accuracy of the nail region with a simple configuration.

In order to solve the above problems, a drawing apparatus of the present invention provides:
In a drawing device for drawing on the fingernail,
A nail region detection unit that detects the nail region of the finger as a nail region based on an image obtained by photographing a masking unit formed by applying a masking agent to a region adjacent to the nail of the finger It is characterized by having.

  According to the present invention, the detection accuracy of the nail region can be improved with a simple configuration in the drawing apparatus.

It is a front view of the drawing apparatus in this embodiment. FIG. 2 is a side sectional view showing an internal configuration with a part of the drawing apparatus shown in FIG. 1 as a section. It is a principal part block diagram which showed the control structure of the drawing apparatus which concerns on this embodiment. (A) is a plan view of a finger showing a state in which a nail region is detected from a print finger, (b) is a plan view of a finger showing a state in which a masking portion is formed around the nail region, and (c) ) Is a plan view of a finger showing a state in which a design image is drawn in the nail region, and (d) is a plan view of the finger showing a state in which the masking portion is peeled off from the printing finger. It is a flowchart which shows the drawing process in this embodiment. It is a flowchart which shows the drawing process in this embodiment. (A) And (b) is a top view which shows an example of the masking part which provided the characteristic part. (A) is a front view of the modification of the drawing apparatus in this embodiment, (b) is a side view which shows the internal structure of the drawing apparatus shown by (a).

Hereinafter, an example of an embodiment of a drawing apparatus and a drawing method of the drawing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.
In the following embodiments, the drawing apparatus will be described assuming that the fingernail of the hand is drawn on the drawing object, but the drawing object of the present invention is not limited to the fingernail of the hand. The fingernail may be drawn.

FIG. 1 is a front view of a drawing apparatus, and FIG. 2 is a side view showing the internal structure of a part of the drawing apparatus shown in FIG.
As shown in FIGS. 1 and 2, the drawing apparatus 1 is a hybrid nail printing apparatus that includes a drawing head 41 and a writing instrument 71 such as a pen, and is housed in the case body 2 and the case body 2. The apparatus main body 10 is provided. 1 and 2, the case main body is indicated by a two-dot chain line.

One end of the front upper portion of the case body 2 is provided with a writing instrument replacement lid 23 configured to be openable and closable so as to replace a writing instrument 71 of the drawing unit 40 described later. The writing instrument replacement lid 23 is rotatable from a closed state to an open state as shown in FIG. 2 via, for example, a hinge.
Further, a drawing medium placed on the writing instrument custom-designing portion 61 at a position corresponding to a writing instrument custom-designating portion 61 described later on one side surface (in this embodiment, the left side surface in FIG. 1) of the case main body 2. A medium insertion / exit 24 that can be replaced (not shown) is formed.

An operation unit 25 (see FIG. 3) is installed on the upper surface (top plate) of the case body 2.
The operation unit 25 is an input unit on which a user performs various inputs.
The operation unit 25 includes, for example, a power switch button for turning on the power of the drawing apparatus 1, a stop switch button for stopping the operation, a design selection button for selecting a design image to be drawn on the nail T, and a drawing start button for instructing to start drawing. For example, operation buttons (not shown) for performing various inputs are arranged.

In addition, a display unit 26 is installed at a substantially central portion of the upper surface (top plate) of the case body 2.
The display unit 26 includes, for example, a liquid crystal display (LCD), an organic electroluminescence display, or other flat displays.
In the present embodiment, the display unit 26 includes, for example, a finger image obtained by photographing the printing finger U1 (an image of the printing finger U1 including an image of the nail T), and an outline of the nail T included in the finger image. An image such as a line, a design selection screen for selecting a design image to be drawn on the nail T, a thumbnail image for design confirmation, an instruction screen for displaying various instructions, and the like are appropriately displayed.
A touch panel may be integrally formed on the surface of the display unit 26. In this case, for example, various selections and instructions can be performed by touching the touch panel surface with a fingertip or the like. Other than the finger, for example, various inputs can be performed by a touch operation of touching the surface of the display unit 26 with a stylus pen or a pointed writing tool.

  The apparatus main body 10 is formed in a substantially box shape, and a lower machine casing 11 installed below the inside of the case main body 2 and an upper machine installed above the lower machine casing 11 and above the inside of the case main body 2. And a frame 12.

First, the lower machine casing 11 will be described.
The lower machine casing 11 includes a back plate 111, a bottom plate 112, a pair of left and right side plates 113 a and 113 b, an X-direction moving stage accommodating portion 114, a Y-direction moving stage accommodating portion 115 and a partition wall 116.
The lower ends of the side plates 113a and 113b are connected to the left and right ends of the bottom plate 112, respectively, and the side plates 113a and 113b are provided in a state where they stand up against the bottom plate 112.
As shown in FIG. 2, the lower portion of the back plate 111 is formed so as to be recessed in two steps toward the front (front side in the finger insertion direction). A lower end portion of the back plate 111 is connected to a front end portion of the bottom plate 112, and the back plate 111 divides a region surrounded by the bottom plate 112 and the side plates 113a and 113b back and forth.
The space formed on the back side of the recessed back plate 111 is an X-direction moving stage accommodating portion 114 and a Y-direction moving stage accommodating portion 115 (see FIG. 2). In the X-direction moving stage accommodating portion 114, the X-direction moving stage 45 of the drawing portion 40 is accommodated when the drawing portion 40 (see FIG. 2) moves forward (front side in the finger insertion direction). A Y-direction moving stage 47 of the drawing unit 40 is disposed in the Y-direction moving stage accommodating unit 115.
Further, the partition wall 116 divides the space on the front side inside the lower machine casing 11 (the space on the front side in the finger insertion direction surrounded by the back plate 111, the bottom plate 112, and the side plates 113a and 113b) vertically. Is provided inside. The partition wall 116 is provided substantially horizontally, the left and right ends of the partition wall 116 are connected to the side plates 113 a and 113 b, respectively, and the rear end portion of the partition wall 116 is connected to the back plate 111.

The lower machine casing 11 is integrally provided with a finger fixing unit 30.
The finger fixing unit 30 will be described with reference to FIG.
FIG. 3 is a cross-sectional view of an essential part schematically showing the configuration of the finger fixing part 30 and its periphery.

The finger fixing unit 30 includes a finger receiving unit 31 that accepts a finger corresponding to the drawing nail T to be drawn (hereinafter referred to as “printing finger U1”), and other than the printing finger U1 that is not the drawing target. And a finger retracting section 32 for retracting the finger (hereinafter referred to as “non-printing finger U2”).
The finger receiving portion 31 is disposed on the upper side of the partition wall 116 and substantially at the center in the width direction of the lower machine casing 11. In addition, a space partitioned by the partition wall 116 on the lower side of the lower machine casing 11 constitutes the finger retracting portion 32.
For example, when drawing on the nail T of the ring finger, as shown in FIG. 2, the ring finger as the printing finger U1 is inserted into the finger receiving unit 31, and the other four fingers (thumb, index finger) as the non-printing finger U2. , Middle finger, little finger) is inserted into the finger retracting portion 32.
The finger receiving portion 31 is open to the front side of the lower machine casing 11 (the front side in the printing finger insertion direction), and the lower side is a finger placement portion 116a constituting a part of the partition wall 116, and both sides and the back side are not shown. It is partitioned by a partition. The finger placement unit 116a has a placement surface (XY plane), and places the finger (printing finger U1) of the nail T on which drawing is performed on the placement surface.
The upper side of the finger receiving portion 31 is a ceiling portion, and an opening for exposing the nail T of the printing finger U1 inserted into the finger receiving portion 31 is formed in the ceiling portion.

On the placement surface of the finger placement unit 116a, a finger holding unit 33 that holds the printing finger U1 inserted into the finger receiving unit 31 from the lower side is disposed. The finger holding unit 33 may be configured to be movable up and down by a mechanism (not shown). In this case, when the printing finger U1 is inserted into the finger receiving unit 31 or taken out from the finger receiving unit 31, the finger holding unit 33 is lowered to a height that does not hinder the insertion and removal of the printing finger U1. When the printing finger U1 is fixed, the finger holding unit 33 is raised so as to push up the printing finger U1 to a position where the upper surface of the printing finger U1 hits the lower surface of the ceiling portion 31d.
In addition, a claw rest 34 that protrudes from the rear partition is provided in the finger receiving portion 31, and the tip portion of the nail T is placed on the nail when the printing finger U 1 is pushed up by the finger holding portion 33. It is designed to ride on the platform 34. Thereby, the position in the height direction of the nail | Tail T is fixed.
Note that the finger holding unit 33 and the nail mount 34 are not essential components of the drawing device, and may be a device that does not include the drawing device.

Further, front walls 31 f (see FIG. 1) that block the front side of the lower machine casing 11 are erected on both sides of the upper surface of the partition wall 116 and on the front side of the lower machine casing 11. Further, a pair of guide walls 31g that narrow toward the finger receiving portion 31 from the end near the center of the front wall 31f and guide the printing finger U1 into the finger receiving portion 31 are formed on the upper surface of the partition wall 116. It is erected.
The user can sandwich the partition wall 116 between the printing finger U1 inserted into the finger receiving unit 31 and the non-printing finger U2 inserted into the finger retracting unit 32. Therefore, the printing finger U1 inserted into the finger receiving part 31 is stably fixed.
In the present embodiment, a protruding portion 116b projecting downward is formed at the front end portion of the partition wall 116. The protruding portion 116b may be a tapered portion that gradually decreases in thickness toward the near side and gradually increases toward the inner side, and the thickness of the protruding portion 116b is formed in a recess on the inner side of the partition wall 116. On the other hand, the whole structure may be thick. Since the protruding portion 116b is formed at the front end portion of the partition wall 116, when the non-printing finger U2 is inserted into the finger retracting portion 32, a space is secured between the drawn fingernail T and the partition wall 116. Further, it is possible to prevent the nail T from coming into contact with the lower surface of the partition wall 116 so that ink adheres to the apparatus side and the picture drawn on the nail T is rubbed and damaged.

An area on the upper surface of the partition wall 116 and next to the finger receiving portion 31 (a position corresponding to the medium insertion / exit 24 of the case main body 2 and on the left side in FIG. 1 in this embodiment) is a drawing head when not drawing. 41 and the writing instrument 71 are the waiting home areas.
This home area is provided with a writing instrument custom writing section 61, a writing instrument cap 62, and a head cap mechanism 43.

The writing instrument customizing section 61 is used for habituation writing of a writing instrument 71 described later, and is arranged within a range where drawing by the writing instrument 71 can be performed.
The writing instrument customary portion 61 is a flat plate portion on which a drawing medium (not shown) inserted from the medium insertion port 24 of the case body 2 is placed.
The drawing medium placed on the writing instrument customizing unit 61 may be any medium that can accustom the pen tip 712, for example, a piece of paper.
Note that the writing instrument customary portion 61 is preferably provided at a height that is substantially the same as the height of the nail T when the printing finger U1 is inserted into the finger receiving portion 31.

  The writing instrument customizing unit 61 is used to prevent the writing tip from being drawn on the nail T before starting drawing with image data in order to prevent the pen tip 712 from being dried or the start of writing from being faint due to poor ink loading. The writing tool 71 is lowered to draw a predetermined figure such as “◯” or “∞” to make a break-in and improve the state of the pen tip 712. There are no particular limitations on the predetermined figure to be drawn when performing break-in writing, but it is preferably a simple figure such as “◯” or “∞” so as not to use ink excessively. In this break-in, it is preferable that the writing position of a predetermined figure such as “◯” or “∞” is gradually shifted within the range of the writing instrument custom-writing part 61 every time break-in is performed. . When writing is performed on almost the entire surface of the drawing medium, a display screen for prompting replacement of the drawing medium such as “Replace paper” is displayed on the display unit 26. In this case, when the user takes out the drawing medium from the medium insertion port 24 and replaces it with a new one, a new writing medium can be written into. If the drawing medium is roll paper, when the drawing space is exhausted, the drawing medium is fed from the roll paper so that break-in can be performed on a new drawing surface.

The writing instrument cap 62 accommodates the writing instrument 71 (particularly, the pen tip 712 of the writing instrument 71) when the writing unit 71 is mounted on the drawing unit 40 and drawing is not being performed (when not drawing). It is made of rubber.
In the present embodiment, the writing instrument cap 62 is installed in front of the writing instrument custom writing unit 61 (on the front side in the finger insertion direction). The number of writing instrument caps 62 corresponding to the number of writing instruments 71 attached to the drawing unit 40 (four in this embodiment) is provided.
At the time of non-drawing, the writing tool 71 is moved directly above the writing tool cap 62, and then the writing tool 71 is lowered by a solenoid 742 described later, and the pen tip 712 is accommodated in the writing tool cap 62. As a result, it is possible to prevent the pen tip 712 from drying when not drawing. The shape or the like of the writing instrument cap 62 is not limited to the illustrated example. For example, the writing instrument cap 62 is a long groove-shaped writing instrument cap that can receive the pen tips 712 of all the writing instruments 71 attached to the drawing unit 40. Also good.
In the present embodiment, since the writing instrument cap 62 is provided near the writing instrument custom-designing part 61 in this way, when starting drawing, the writing instrument 71 is raised and the writing instrument custom-designing part 61 immediately adjacent thereto is used. You can write in and start drawing. For this reason, the time required for the movement of the writing instrument 71 can be minimized, and a rapid drawing operation can be performed.

The head cap mechanism 43 covers the ejection surface of the drawing head 41 when not drawing. The head cap mechanism 43 is disposed on the partition wall 116 at a position corresponding to the position at which the drawing head 41 is disposed when the writing tool 71 is accommodated in the writing tool cap 62.
By providing the head cap mechanism 43 and covering the ejection surface of the drawing head 41 during non-drawing, the drawing head 41 can be prevented from drying during non-drawing.

The drawing unit 40 performs drawing on the nail T based on the image data of the selected design image using a plurality of types of ink. In this embodiment, the writing unit includes a drawing head 41 and a writing tool 71 which are drawing tools. A carriage 42 on which a unit 72 is mounted is provided.
The carriage 42 is attached to the carriage support member 44, whereby the drawing head 41 and the writing instrument unit 72 are supported by the carriage support member 44 via the carriage 42.
The drawing unit 40 includes a carriage 42 and a carriage support member 44 that supports the carriage 42, an X-direction moving stage 45 for moving the carriage 42 in the X direction (X direction in FIG. 1, left and right direction of the drawing apparatus 1), A direction moving motor 46, a Y direction moving stage 47 for moving the carriage 42 in the Y direction (Y direction in FIG. 2, the front and rear direction of the drawing apparatus 1), a Y direction moving motor 48, and the like are provided.

The drawing head 41 is an ink jet drawing tool that sprays and applies ink, which is a liquid material, to the surface of the nail T, which is the drawing target surface, and draws the surface of the nail T. Note that the configuration and method in which the drawing head 41 sprays and applies ink is not particularly limited.
The drawing head 41 of the present embodiment is an integrated cartridge in which an ink tank is integrated, and a plurality of ink chambers (ink storage portions, not shown) that are individually partitioned are provided inside each. The ink chamber is filled with, for example, C, M, and Y inks as liquid materials for drawing the design.
The type and number of inks (liquid materials) are not limited to those exemplified here.

In the present embodiment, any ink chamber of the drawing head 41 is filled with a liquid masking agent for forming the masking portion M around the nail region.
Since the masking agent is applied directly to the skin, a masking agent that has as little influence on the human body as possible is preferable. It has resistance to ink used for drawing on the nail T and can function as a masking agent. is there. Specifically, for example, PVA-based masking sol can be used as a masking agent.
The masking agent may have a color different from the color used in the design drawn by the drawing head 41 or the writing tool 71 as a drawing tool so that the nail information detection unit 812 described later can easily detect the masking agent. preferable.
The masking agent is preferably a color that can be clearly distinguished from the color of the nail T or finger skin. For example, the HSV color space (HSV model, ie, saturation / chroma, brightness) (Color space consisting of three components (Value, Lightness, Brightness)), etc., etc., that have a color (for example, blue, green, etc.) positioned as far as possible from the nail color and skin color Is preferred.
Furthermore, it is preferable that the masking agent is a film after being applied in a liquid state and then dried. By using a masking agent that forms a film when dried, the entire masking portion M is in the form of a film, which can be easily peeled off, and the masking portion M can be removed after the drawing process is completed. Can be easily removed.

On the lower surface of the drawing head 41 (the surface facing the finger placement portion 116a when the drawing head 41 is mounted on the carriage 42), an ejection port for ejecting each color ink filled in the ink chamber is formed. A discharge surface (not shown) is provided.
The drawing head 41 includes an ink discharge portion 411 for discharging ink from the discharge port of the discharge surface. The ink ejection unit 411 is configured by, for example, a piezo element (not shown) as an actuator.
The carriage 42 is provided with a head drive circuit board (not shown) for driving the drawing head 41. When the drawing head 41 is mounted on the carriage 42, a connector (not shown) on the drawing head 41 side is the head. The ink discharge unit 411 is electrically connected to the control device 80 via the head drive circuit board. Accordingly, a drive voltage is applied to the piezo elements constituting the ink discharge section 411 according to the control of the drawing control section 815 (see FIG. 3), which will be described later, and the piezo elements are deformed or vibrated by the application of the voltage, so that it is not shown The ink flow path is compressed so that ink is ejected from the ejection port on the ejection surface.

The writing instrument unit 72 includes at least one writing instrument 71 that is a drawing tool for drawing on the nail T of the printing finger U1. The writing instrument 71 is held by a writing instrument holding unit 73.
In the present embodiment, the writing instrument unit 72 includes four writing instrument holders 73 (described later) each holding one writing instrument 71. In addition, the number, shape, etc. of the writing instrument holding part 73 are not limited to the illustrated example.
The writing instrument 71 can be replaced as appropriate by opening the above-described writing instrument replacement lid 23. The writing instrument 71 may be attached to all the writing instrument holders 73 or may be attached to only a part of the four writing instrument holders 73.

The writing tool 71 which is a drawing tool is for drawing by applying ink, which is a liquid material, to the surface of the nail T.
The writing tool (drawing tool) 71 held in each writing tool holding portion 73 is provided with a pen tip 712 on the tip side of the pen shaft portion 711. The inside of the pen shaft portion 711 is an ink storage portion that stores various inks. The ink accommodated in the pen shaft portion 711 is not particularly limited in terms of viscosity, colorant particle size (particle size), and the like. For example, ink containing gold and silver glitter, white ink, UV curable type Ink, gel nail, undercoat, topcoat, and nail polish can also be used.

The writing tool 71 is, for example, a pen in which the pen tip 712 is a ball-point pen type in which the pen tip 712 is pressed against the surface of the nail T to draw the ink contained in the pen shaft portion 711. Note that the writing instrument 71 is not limited to a ballpoint pen type, for example, a sign pen type that draws ink by soaking a felt-shaped pen tip, or a brush pen type that draws ink by soaking the bundled hair. It may be. Various types of pen nibs 712 can be prepared.
The writing tool 71 held in each writing tool holding unit 73 may be a pen having the same type of nib 712 or a writing tool having a different type of nib 712.

  In the present embodiment, since four writing instrument holding portions 73 for holding the writing instrument 71 are arranged in the width direction of the apparatus (left and right direction, X direction in FIG. 1), the position of the pen tip 712 is the X direction (of the apparatus). Left and right direction), but this deviation is an integral multiple of one step in the drawing operation, and drawing is performed with the number of steps corrected corresponding to the writing tool 71 used for drawing. The four writing instruments 71 can draw at the same position.

Each writing instrument holding portion 73 is provided with a writing instrument holder 731 that is a cylindrical portion that holds the writing instrument 71 substantially vertically. The writing tool holder 731 is configured to move the writing tool 71 up and down by the cooperation of the spring 741 and the solenoid 742 while holding the writing tool 71 substantially vertically. Specifically, when the solenoid 742 is driven, the writing tool 71 descends against the urging force of the spring 741, and the drawing state is brought into contact with the surface of the nail T to be drawn and the drawing medium. . In the state where the solenoid 742 is opened, the writing instrument 71 is raised by the biasing force of the spring 741, and the non-drawing state is brought into contact with the surface of the nail T and the drawing medium.
In this embodiment, the solenoid 742 is used as an actuator for moving the writing tool 71 up and down. However, the actuator for moving the writing tool 71 up and down is not limited to the solenoid 742. Since the writing instrument 71 is lightweight, an actuator for moving the writing instrument 71 up and down can be configured by various small driving devices in addition to the solenoid.

A carriage support member 44 that supports the carriage 42 is fixed to an X-direction moving unit 451 attached to the X-direction moving stage 45. The X-direction moving unit 451 is moved in the X direction along a guide (not shown) on the X-direction moving stage 45 by driving the X-direction moving motor 46, whereby the carriage 42 is moved in the X direction (FIG. 1). In the X direction and the left and right direction of the drawing apparatus 1).
The X direction moving stage 45 is fixed to the Y direction moving portion 471 of the Y direction moving stage 47. The Y-direction moving unit 471 is configured to move in the Y direction along a guide (not shown) on the Y-direction moving stage 47 by driving the Y-direction moving motor 48, whereby the carriage 42 is moved in the Y direction (FIG. 2). In the Y direction, and the front-rear direction of the drawing apparatus 1).
In this embodiment, the X direction moving stage 45 and the Y direction moving stage 47 are configured by combining an X direction moving motor 46 and a Y direction moving motor 48 with a ball screw and a guide (not shown). As the X direction moving motor 46 and the Y direction moving motor 48 of the present embodiment, a step motor that moves by a predetermined amount every time one pulse is sent is applied.
In the present embodiment, a carriage moving unit 49 (see FIG. 3) that drives a carriage 42 provided with a writing tool 71 for drawing on the nail T in the X and Y directions by the X direction moving motor 46, the Y direction moving motor 48, and the like. It is configured.

  The ink ejection unit 411 of the drawing head 41 in the drawing unit 40, the solenoid 742 for moving the writing tool 71 up and down, the X-direction moving motor 46, and the Y-direction moving motor 48 are a drawing control unit 815 (see FIG. 3) of the control device 80 described later. And is controlled by the drawing control unit 815.

As shown in FIGS. 1 and 2, the photographing unit 50 is provided in the upper machine casing 12.
That is, a substrate 13 is installed on the upper machine casing 12, and two cameras 51 as imaging devices are installed on the lower surface of the central portion of the substrate 13, for example. The camera 51 preferably has, for example, about 2 million pixels or more.
The camera 51 captures the nail T of the printing finger U1 inserted in the finger receiving unit 31, and obtains a finger image including a nail image that is an image of the nail T of the printing finger U1.
In the present embodiment, the two cameras 51 are provided substantially side by side in the width direction of the nail T of the printing finger U1 inserted in the finger receiving unit 31. Of the two cameras 51, one camera 51 is provided to face the bottom surface of the finger receiving portion 31 and photographs the nail T from directly above. Further, the other camera 51 is arranged to be slightly inclined with respect to the bottom surface of the finger receiving portion 31 and photographs the nail T from an obliquely upward direction.
An illumination lamp (illumination device) 52 such as a white LED is installed on the substrate 13 so as to surround the camera 51. The illuminating lamp 52 illuminates the nail T of the printing finger U1 when the camera 51 takes a picture. The photographing unit 50 includes the camera 51 and the illumination lamp 52.
The photographing unit 50 is connected to a photographing control unit 811 (see FIG. 3) of the control device 80 described later, and is controlled by the photographing control unit 811.
Image data of an image photographed by the photographing unit 50 is stored in a nail image storage area 821 of the storage unit 82 described later.

In this embodiment, the nail | Tail T can be image | photographed from at least 2 different positions and angles with the two cameras 51 as an imaging device, and at least 2 nail images are acquired.
Then, based on these nail images, the nail information detection unit 812 described later has an inclination angle with respect to the mounting surface of the surface of the nail T in the width direction of the nail T in addition to the contour of the nail T (shape of the nail T) Nail information such as a value corresponding to (hereinafter also referred to as “nail curvature”) and the vertical position of the nail T can be detected. That is, for example, by capturing an image from directly above the nail T and an image from an obliquely upward direction of the nail T, not only the contour of the nail T but also the position, the inclination angle of the surface of the nail T (nail curvature) ) Can be detected accurately.
It should be noted that it is not essential to provide two cameras 51 as an imaging device so that the inclination angle (claw curvature) of the nail T can be detected, but only one camera 51 is provided and the nail T is only in the upward direction. The outline of the nail T (the shape of the nail T) may be detected as nail information.

Further, the control device 80 is installed on, for example, the substrate 13 disposed in the upper machine casing 12.
FIG. 3 is a principal block diagram showing a control configuration in the present embodiment.
As shown in FIG. 3, the control device 80 includes a control unit 81 configured by a CPU (Central Processing Unit) (not shown), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (both not shown). And a storage unit 82 constituted by the computer.

The storage unit 82 stores various programs and various data for operating the drawing apparatus 1.
Specifically, the ROM of the storage unit 82 includes a nail information detection program for detecting nail information such as the shape and position of the nail T and the nail area of the nail T from the finger image, and a drawing for generating drawing data. Various programs such as a data generation program and a drawing program for performing a drawing process are stored. When these programs are executed by the control device 80, each unit of the drawing device 1 is controlled in an integrated manner. Yes.
In the present embodiment, the storage unit 82 includes a nail image storage area 821 for storing an image of the nail T of the user's printing finger U1 (a finger image including an image of the nail T) acquired by the photographing unit 50, and nail information. A nail information storage area 822 for storing nail information detected by the detection unit 812, a design storage area 823 for storing image data of a design image drawn on the nail T, and the like are provided.

Further, in the present embodiment, information about the range where the masking part M is formed, the shape of the masking part M, and the like are also stored in the storage unit 82.
The range and shape for forming the masking portion M are not particularly limited. For example, in order to prevent ink from adhering to the skin even when the ink ejected from the drawing head 41 is scattered in a mist form, the masking agent It is preferable to apply to the right and left of the nail T and the portion adjacent to the base portion on the lower side of the nail T from the finger skin portion outside the nail region to the borderline between the nail T and finger skin. For this reason, for example, masking is performed so that a portion extending from the boundary between the region detected as the nail region of the nail T and the outside of the nail region to the outside of the fingernail region by a predetermined range is the masking portion M. The formation range of the part M is set. Thereby, as shown in FIG. 4B and the like, the masking portion M is formed so as to surround the nail region in a U shape.

  When viewed functionally, the control unit 81 includes an imaging control unit 811, a nail information detection unit 812, a drawing data generation unit 813, a display control unit 814, a drawing control unit 815, and the like. The functions as the imaging control unit 811, the nail information detection unit 812, the drawing data generation unit 813, the display control unit 814, the drawing control unit 815, and the like are stored in the CPU of the control unit 81 and the program stored in the ROM of the storage unit 82. It is realized by the cooperation of.

The photographing control unit 811 controls the camera 51 and the illumination lamp 52 of the photographing unit 50 and causes the camera 51 to photograph an image of the nail T of the printing finger U1 inserted into the finger receiving unit 31.
The photographing control unit 811 controls the camera 51 and the illumination lamp 52 of the photographing unit 50 to photograph the nail T of the printing finger U1, and obtains a finger image including the image of the nail T.
In the present embodiment, when the masking portion M is formed, the masking portion M is also configured to be used for detecting the nail region. For this reason, the imaging control unit 811 controls the camera 51 to perform imaging including the nail T and the masking unit M provided around the nail T.

The nail information detection unit (nail region detection unit) 812 is based on the finger image (that is, the image of the printing finger U1 including the image of the nail T and the masking unit M) taken by the camera 51, and the nail T of the printing finger U1. The nail information including the nail region is detected.
Here, the nail information means the shape and size of the nail T, the horizontal position of the nail T, the height of the nail T (the vertical position of the nail T, hereinafter “vertical position of the nail T” or simply “nail”). Also referred to as “position of T”), the inclination angle (nail curvature) of the nail T, and the nail information detection unit 812 detects the shape of the nail T, the position of the nail T, and the nail curvature of the nail T as nail information. . Here, the entire area defined by the contour of the nail T is defined as a nail area (drawing area).

Specifically, the nail information detection unit 812 detects the position and shape of the contour of the nail T from the finger image of the print finger U1 acquired by the camera 51, and detects the contour in the x and y coordinates. Acquired as information represented by
In the present embodiment, the nail information detection unit 812 performs the first nail region detection after the masking unit M is formed and before the first drawing by the drawing head 41 or the writing tool 71 as a drawing tool. The second nail region detection is performed after the first drawing with the tool and before the second drawing with the drawing tool.

Here, “first drawing” means drawing performed in a state where nothing is drawn on the nail T, and “second drawing” means any drawing on the nail T (application of a base, design image) This is a drawing performed after the image is applied.
The masking portion M is formed in a state where nothing is drawn yet on the nail T and the printing finger U1. That is, before the masking portion M is formed, nothing is drawn yet on the nail T and the printing finger U1, and at this time, the nail information detection unit 812, for example, prints the printing finger U1 acquired by the camera 51. The contour (shape) of the nail T is detected from the finger image including the nail image of the nail T based on the color difference between the nail T and the other finger portions.
Further, when the first nail region detection and the second nail region detection performed after the masking unit M is formed, the nail information detection unit 812, for example, the nail of the nail T of the printing finger U1 acquired by the camera 51. The contour (shape) of the nail T is detected from the finger image including the image based on the color difference between the nail T and the masking part M. As described above, since the masking agent that forms the masking portion M has a color different from the design color applied to the nail T, the nail information detection unit 812 has a base or design image on the nail T. Even after the drawing, the nail region can be accurately detected. The first detection result of the nail region acquired by the first nail region detection and the second detection result of the nail region acquired by the second nail region detection are stored in the nail information storage region 822.
In the second nail region detection, for example, a base is applied to the nail T as “first drawing”, and after the printing finger U1 is once removed from the finger receiving unit 31 to dry the base, etc., When the printing finger U1 is inserted into the finger receiving unit 31 again, or after the design image is drawn and until the finishing top coat is performed, the printing finger U1 is once removed from the finger receiving unit 31, and then the finger receiving unit 31 again. This is performed before performing the next drawing process when the printing finger U1 is inserted / removed between each drawing process, such as when the printing finger U1 is inserted into the printing finger U1.
The information on the nail area stored as the second detection result in the nail information storage area 822 is updated each time a new second nail area detection is performed and a new second detection result is acquired. Updated with information.
In addition, the method for the nail information detection unit 812 to detect the contour (shape) of the nail T in the first nail region detection is not particularly limited, and is not limited to that described here.
The nail information detection unit 812 may also detect the contour of the masking unit M in the first nail region detection and the second nail region detection, and the contour information of the masking unit M may be stored in the storage unit 82.

The nail information detection unit 812 detects the nail height of the nail T based on the image of the nail T taken by the camera 51. Here, the nail height is the position of the nail T in the vertical direction.
Further, the nail information detection unit 812 detects the nail curvature of the nail T based on the image of the nail T taken by the camera 51. The nail curvature is a value corresponding to the inclination angle of the surface of the nail T with respect to the mounting surface in the width direction of the nail T.
For example, by photographing the nail T from two different angles by the camera 51, the nail information detection unit 812 can estimate the nail height and nail curvature of the nail T from the change of the shadow appearing in the nail image.
Note that the method by which the nail information detection unit 812 detects the nail height and nail curvature of the nail T is not particularly limited, and is not limited to those described here.

The drawing data generation unit 813 generates drawing data to be applied to the nail T of the printing finger U1 by the drawing unit 40 based on the nail information detected by the nail information detection unit 812.
Specifically, the drawing data generation unit 813 performs a fitting process (fitting process) by reducing or enlarging the image data of the design image based on the nail information such as the shape of the nail T detected by the nail information detection unit 812. ) To generate drawing data for drawing a design image on the nail T.

In addition, the image data generation unit 813 of the present embodiment includes a drawing data correction unit 813a that corrects drawing data.
The drawing data correction unit 813a corrects drawing data of a design drawn by the drawing head 41 and the writing tool 71 which are drawing tools.
The drawing data correction unit 813a performs the first detection result of the nail region acquired by the first nail region detection by the nail information detection unit 812 and the second detection of the nail region acquired by the second nail region detection. The position movement amount of the nail region is calculated from the result and the drawing data is corrected. For example, the position of the nail region as the second detection result is moved 1 mm to the right of the X direction (the right direction in FIG. 1, that is, the right direction of the drawing apparatus 1) from the position of the nail region as the first detection result. If there is, the drawing data correction unit 813a corrects the drawing data so that the drawing position is shifted by 1 mm to the right.

In the present embodiment, specifically, the drawing data correction unit 813a is the first detection result nail region in the initial state (that is, the state where nothing is drawn on the nail T) and the second detection result. By matching the nail region, the position movement amount of the nail region is calculated.
Note that the most recent drawing is performed by matching the nail region as the second detection result with the nail region in the drawing state as the latest second detection result instead of the nail region in the initial state as the first detection result. The movement amount from the position of the nail region in the process may be calculated.
For example, in the case of drawing one pattern using a plurality of colors, the pattern is dried every time it is drawn with one color, and the next color is applied after drying to gradually complete the pattern. By correcting the positional deviation from the immediately preceding drawing process, a beautiful pattern can be drawn without positional deviation.
Note that the position and range of the masking portion M itself are also detected before each drawing process (that is, for example, the base coating process, the background color drawing process, the pattern drawing process, the top coat coating process, etc.), and the detection results are stored. The position movement amount of the nail region may be calculated by storing in the unit 82 and matching the masking units M to detect the positional deviation.
If inks of various colors are applied to the nail T during the drawing process, an accurate detection result for the nail region cannot be obtained in the second nail region detection, and matching between the nail regions is difficult. There can be.
Even in this case, since the shape of the masking portion M (particularly, the shape of the outer edge portion of the masking portion M that is not easily affected by drawing on the nail T) does not change, the masking portions M can be matched to move the position more precisely. The amount can be calculated.
Then, the drawing data correction unit 813a corrects the drawing data based on the calculated position movement amount. Thereby, even if the position of the nail | Tail T shifts | deviates for every drawing process, it can draw without position shift.

In addition, the drawing data correction unit 813a performs curved surface correction on the drawing data for drawing on the nail T according to the curved shape of the nail T based on the nail curvature of the nail T detected by the nail information detection unit 812.
Note that the nail information detection unit 812 may accurately detect the nail curvature for each nail T, and the drawing data correction unit 813a may accurately calculate the correction value of the curved surface correction accordingly. The curved shape based on the nail curvature is classified into any of a plurality of preset curved patterns, and correction values are prepared in advance for each classification in the drawing data correction unit 813a. The curved surface of the drawing data may be corrected by applying a correction value prepared for the drawing data. In this case, a predetermined correction value corresponding to each curve pattern is stored in the storage unit 82. By classifying the nail T into any one of a plurality of curved patterns and performing curved surface correction with a correction value prepared for each curved pattern, curved surface correction can be performed easily and quickly.

  The display control unit 814 controls the display unit 26 to display various display screens on the display unit 26. In the present embodiment, the display control unit 814 includes, for example, a design image selection screen, a thumbnail image for design confirmation, a finger image obtained by photographing the printing finger U1, a nail image included in the finger image (an image of the nail T), and various types. An instruction screen or the like is displayed on the display unit 26.

The drawing control unit 815 outputs the drawing data of the design image generated after the drawing data generation unit 813 appropriately performs the correction according to the position movement amount of the nail T and the curved surface correction to the drawing unit 40, and The X direction moving motor 46, the Y direction moving motor 48, which is the carriage moving unit 49 of the drawing unit 40, the ink ejection unit 411 of the drawing head 41, and the writing tool 71 are moved up and down so as to perform drawing according to the drawing data. The operation of the solenoid 742 to be controlled is controlled.
In the present embodiment, the drawing control unit 815 applies a masking agent to a predetermined area outside the nail area adjacent to the nail area by using a drawing tool (the drawing head 41 in this embodiment) before drawing the design image on the nail T. Is applied to form a masking portion M around the nail region.
Note that the range in which the masking portion M is formed is set based on information stored in the storage portion 82.
When drawing is performed on a plurality of fingers (for example, all ten fingers from the thumbs of both hands), the masking portions M are sequentially formed for all the ten fingers.

Next, the operation of the drawing apparatus 1 and the drawing method of the drawing apparatus 1 in the present embodiment will be described with reference to FIGS. 4 and 5.
4 (a) to 4 (d) are plan views of the printing finger schematically showing from the detection of the nail region to the drawing of the design image on the nail T, and FIG. 5 is a drawing of the present embodiment. It is a flowchart which shows the flow of a method.

When drawing by the drawing apparatus 1, the user turns on the power switch and activates the control device 80, and then inserts the printing finger U 1 into the finger receiving unit 31 and puts the non-printing finger U 2 into the finger retracting unit 32. After inserting and fixing the print finger U1, the print switch is operated.
When an instruction is input from the print switch, before the printing operation is started, as shown in FIG. 5, first, the imaging control unit 811 controls the imaging unit 50 and illuminates the printing finger U1 with the illumination lamp 52. The printing finger U1 is photographed by the camera 51, and a finger image of the printing finger U1 inserted into the finger receiving unit 31 is acquired (step S1).

Next, the nail information detection unit 812 detects the outline (nail region) of the nail T based on the finger image acquired by the imaging unit 50 (that is, the nail T portion indicated by the oblique lines in FIG. It detects as an area | region, step S2).
In addition, the display control unit 814 causes the display unit 26 to display a design selection screen. The user operates the operation unit 25 to select a desired design image from a plurality of design images displayed on the design selection screen, whereby a selection instruction signal is output from the operation unit 25 and printed on the nail T. A design image to be selected is selected (step S3).

When the nail region of the nail T is detected by the nail information detection unit 812, the drawing control unit 815 acquires information on the range where the masking unit M is formed from the storage unit 82, and based on this information and the information on the nail region The drawing unit 40 is operated to apply a masking agent to a predetermined range outside the nail region to form the masking unit M (see step S4, FIG. 4B).
Specifically, the drawing control unit 815 operates the carriage moving unit 49 to appropriately move the drawing head 41 in the XY directions, and operates the ink discharge unit 411 to discharge the masking agent from the drawing head 41, thereby A masking portion M is formed in a predetermined range outside the region.
When a design image is drawn on a plurality of fingers such as 10 fingers of both hands, all the fingers to be drawn are sequentially inserted into the apparatus, and the steps S1, S2 and S4 are repeated. Thus, the masking portion M is formed on all the fingers to be drawn.

After the masking portion M is formed and before the first drawing, the photographing control unit 811 controls the photographing unit 50 again to acquire the finger image of the printing finger U1 inserted into the finger receiving unit 31 (step S5). .
Next, the nail information detection unit 812 performs first nail region detection on the finger image and obtains a first detection result. Specifically, the nail information detection unit 812 detects the outline (nail region) of the nail T based on the finger image acquired in step S5 (that is, the first detection result of the first nail region detection). Acquisition, step S6). Specifically, the color in the finger image is analyzed, and the nail region is detected from the color difference between the nail T and the masking unit M. At this time, the contour (masking region) of the masking part M itself may be further detected. At this time, the nail information detection unit 812 also acquires nail information other than the nail region such as the position in the height direction of the nail T and the nail curvature.
The acquired nail information such as the nail area is stored in the nail information storage area 822 of the storage unit 82.

Based on the nail information acquired by the nail information detection unit 812, the drawing data generation unit 813 processes the image data of the design image so that the design image is fitted to the nail region, and generates drawing data (step S7). ).
At this time, the drawing data correction unit 813a performs curved surface correction on the drawing data according to the nail curvature included in the nail information.
When the curved surface corrected drawing data is generated, the drawing control unit 815 outputs the drawing data to the drawing unit 40, and the drawing unit 40 performs a drawing process on the nail T according to the drawing data. (Step S8, see FIG. 4C).
Specifically, the drawing control unit 815 operates the carriage moving unit 49 based on the drawing data, appropriately moves the drawing head in the XY directions, and operates the ink discharge unit 411 to apply ink of each color to the drawing head 41. And the nail T is drawn.
When drawing is performed using the writing tool 71, the drawing control unit 815 drives the solenoid 742 to make the writing tool 71 ready for drawing, and operates the carriage moving unit 49 based on the drawing data, thereby writing the writing tool. 71 is appropriately moved in the XY directions to cause the nail T to perform drawing. At this time, the writing instrument 71 is pressed against the surface of the nail T by its own weight, and performs drawing while moving up and down following the surface shape of the nail T.
In addition, for example, when a background is drawn by the writing tool 71 and a fine pattern portion is drawn by the drawing head 41, a part drawn by the drawing head 41 and a part drawn by the writing tool 71 are included in one design image. In some cases, the drawing control unit 815 operates the ink ejection unit 411 of the drawing head 41 and the solenoid 742 of the writing tool 71 as appropriate to perform drawing using both the drawing head 41 and the writing tool 71.

Here, a specific flow of the drawing process (that is, step S8 in FIG. 5) after the formation of the masking portion M (that is, step S6 in FIG. 5) will be described with reference to FIG.
For example, as shown in FIGS. 4C and 4D, when drawing a design image having a base portion Db and pattern portions Dd1 to Dd3, first, after forming the masking portion M, the printing finger U1 When the nail information is detected (that is, step S6 in FIG. 5) and the drawing data is generated based on the nail information (that is, step S7 in FIG. 5), the drawing control unit 815 displays the generated drawing data in the drawing unit. 40, the base portion Db, which is the first drawing, is drawn (step S11).

Next, when drawing the pattern portion Dd1, which is the second drawing, before the drawing of the pattern portion Dd1, the printing finger U1 including the nail T and the masking portion M is photographed to obtain a finger image (step) S12).
The nail information detection unit 812 detects the nail region from the finger image (that is, the acquisition of the second detection result by the second nail region detection, step S13). Specifically, the color in the finger image is analyzed, and the nail region is detected from the color difference between the nail T and the masking unit M.

When the nail area is detected, the drawing data correction unit 813a matches the nail area with the nail area that is the first detection result obtained by the first nail area detection in step S7, thereby obtaining the nail area. Is calculated, and the drawing data is corrected (step S14).
When the drawing data correction unit 813a calculates the position movement amount of the nail region, the masking unit M may be matched together with the matching between the nail regions or instead of the matching between the nail regions. .
Then, the drawing control unit 815 outputs the corrected drawing data to the drawing unit 40 and causes the drawing portion Dd1 that is the second drawing to be drawn (step S15).

  The control unit 81 determines whether or not the drawing process of the design image to be drawn for the nail T has been completed (that is, in the examples of FIGS. 4C and 4D) It is determined whether or not the drawing of the pattern portions Dd1 to Dd3 has been completed (step S16). If all the design image drawing steps have been completed (step S16; YES), the process ends. On the other hand, when it is determined that the drawing has not been completed (step S16; NO), the process returns to step S12 and the subsequent processing is repeated.

When there are a plurality of fingers to be drawn, drawing of the background portion Db as the first drawing processing and drawing of the pattern portions Dd1 to Dd3 as the second drawing processing are sequentially performed for each finger. When all drawing steps for a finger are completed, the same processing may be repeated for the next finger.
In this case, for example, when drawing on the thumb and ring finger, first, the base portion Db is drawn on the thumb and the pattern portions Dd1 to Dd3 are drawn, and then the finger is exchanged to draw the base portion Db on the ring finger. The portions Dd1 to Dd3 are drawn.
For all the fingers, first, the base portion Db is drawn as the first drawing process for each finger while sequentially replacing the fingers, and then the second drawing process is performed for each finger while sequentially switching the fingers. The pattern portions Dd1 to Dd3 may be drawn.
In this case, for example, when drawing on the thumb and ring finger, first, the base portion Db is drawn on the thumb, then the finger is replaced and the base portion Db is drawn on the ring finger, and then the pattern portions Dd1 to Dt1 on the thumb. Dd3 is drawn, and further, the finger is exchanged and the pattern parts Dd1 to Dd3 are drawn on the ring finger. When drawing is performed in such a procedure, even if it is necessary to allow time for drying after drawing the base portion Db and the pattern portions Dd1 to Dd3 for one finger, drawing of the other finger is performed at that time. It is possible to perform drawing processing more quickly by making effective use of time.

When the drawing of the design image for the nail T is completed, the drawing control unit 815 moves the carriage 42 until the drawing head 41 is positioned on the head cap mechanism 43 and the writing tool 71 is positioned on the writing tool cap 62. The ejection surface of the drawing head 41 is covered with a head cap mechanism 43, and a writing instrument cap 62 is attached to the writing instrument 71 to prevent drying.
Then, the user pulls out the printing finger U1 from the apparatus, and removes and removes the masking portion M that is in the form of a film (see FIG. 4D).

As described above, according to the present embodiment, the masking portion M is provided around the nail region before drawing on the nail T, and the first drawing is performed after the masking portion is formed and before the first drawing. The nail region detection is performed, the second nail region detection is performed after the first drawing and before the second drawing, and the detection result by the first nail region detection and the detection result by the second nail region detection are Then, the position movement amount of the nail region is calculated, and the drawing data is corrected.
For this reason, the nail region can be accurately detected by detecting the region surrounded by the masking portion M. As a result, the printing finger U1 is inserted and removed from the apparatus during the drawing process, or the finger moves with the passage of time, so that the position of the nail T starts from the position where the initial drawing starts (ie, FIG. 4A). To the horizontal direction in FIG. 4 (d)) or the extending direction of the finger (ie, the vertical direction in FIG. 4 (a) to FIG. 4 (d)), or diagonally (ie, from FIG. 4 (a)). Even in the case of tilting in a slanting direction (4 (d)), it is possible to perform nail printing with a beautiful finish by correcting the positional deviation of the nail region with high accuracy.
Moreover, since the masking agent of this embodiment has a color different from the color used in the design drawn by the drawing tool, what color is applied to the nail T and what pattern is drawn Even if this occurs, the nail region can be reliably detected.
Further, since the masking agent has a color that can be distinguished from the nail T and the color of the skin, the region of the masking part M to which the masking agent is applied can be used for the matching process, and the amount of movement of the nail region Can be detected more accurately and reliably.
In addition, since the masking portion M is provided around the nail area to the border of the nail area, even if the ink is scattered or drawn out of the nail area, the ink adheres to the finger. In addition, by removing the masking portion M after the drawing process is completed, the dirt attached outside the nail region can be removed.
Further, since the masking agent is formed into a film by drying after application, it is easy for the user to peel off, and the masking portion M can be easily removed after all the drawing steps for the nail T are completed.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

For example, in the above embodiment, as shown in FIGS. 4B and 4C, the outer shape of the masking portion M on the hairline side of the nail T is linear, but the outer shape of the masking portion M is Is not limited to this.
For example, as shown in FIG. 7A, the masking portion M on the hairline side of the nail T is provided with a protruding feature portion Ma having a sharp tip, or as shown in FIG. A rectangular feature Mb may be provided on the masking part M on the hairline side.
Such feature parts Ma and Mb can be used as an index when the drawing data correction unit 813a calculates the position movement amount of the nail region by matching the masking parts M to each other. By detecting the shift amount, the position movement amount of the nail region can be calculated easily and accurately.
Further, when such feature parts Ma and Mb are provided, the masking part M can be easily peeled off by hooking a nail or the like on the feature parts Ma and Mb even when the masking part M is peeled off. it can.
Further, when such characteristic parts Ma and Mb are provided in a portion near the end of the printing finger U1 in the width direction, when the printing finger U1 is largely rotated around the axis in the extending direction of the finger. The feature parts Ma and Mb are not shown in the finger image. For this reason, it becomes possible to easily detect the rotation of the printing finger U1 only by analyzing the finger image.

Further, in this embodiment, the case where the drawing data correction unit 813a corrects the drawing data when the position deviation of the nail area is detected is illustrated. However, this is the case when the position deviation of the nail area is detected. It is not limited to.
For example, when the positional deviation is not less than a predetermined value and exceeds the range that can be dealt with by correction, the fact may be displayed on the display unit 26 or the like to notify the user.
The determination of whether or not the range that can be dealt with by correction may be made may be made by providing a threshold value. For example, as shown in FIGS. 7A and 7B, when the feature points Ma and Mb are provided in the vicinity of the end in the width direction of the finger in the masking portion M, any one of the feature portions Ma, When Mb no longer appears in the finger image, it is determined that there has been a positional deviation that exceeds the range that can be handled by correction, and a notification or warning is issued so that the drawing operation is stopped and the printing finger U1 is reset. May be.

In the present embodiment, the case where the user peels and removes the masking portion M after completion of the drawing process is illustrated. However, for example, a removal mechanism that hooks the masking portion M in the drawing apparatus 1 and automatically peels it off is used. It may be provided.
When such a mechanism is provided, it is possible to save the user from having to peel off the masking portion M.

In the present embodiment, the drawing apparatus 1 is described as an example of a hybrid nail printing apparatus including an ink jet drawing head 41 and a writing tool 71 as drawing tools. However, the drawing apparatus is not limited thereto. The configuration of the present invention can also be used for a plotter-type nail printing apparatus having only the writing instrument 71 or a nail printing apparatus having only an ink-jet drawing head (see FIG. 8).
When the drawing apparatus is a plotter-type nail printing apparatus including only the writing tool 71, the masking agent 71 is also applied by the writing tool 71.

Further, as shown in FIGS. 8A and 8B, a drying mechanism 9 including a heater or the like for drying ink may be provided in the drawing apparatus 1.
When the drying mechanism 9 is provided, it is not necessary to insert and remove the printing finger U1 in order to dry the ink for each drawing process, but the finger may move before all drawing is completed.
Therefore, the first nail region detection is performed after the masking portion M is formed by the method of the present embodiment and before the first drawing (for example, the drawing of the base portion Db in FIG. 4B), and the first The second nail area detection is performed after drawing (for example, drawing of the background portion Db in FIG. 4B) and before the second drawing (for example, drawing of the pattern portions Dd1 to Dd3 in FIG. 4B). The drawing data correction unit 813a applies the nail from the nail region which is the first detection result obtained by the first nail region detection and the nail region which is the second detection result obtained by the second nail region detection. It is preferable to perform the second drawing (for example, drawing of the pattern portions Dd1 to Dd3 in FIG. 4B) after calculating the position movement amount of the region and correcting the drawing data.
In the present embodiment, the drawing apparatus 1 is configured to automatically form the masking portion M by applying a masking agent with the drawing head or the writing tool 71, but the present invention is not limited to this. Alternatively, the user may manually form the masking portion M by applying a masking agent to a region adjacent to the nail T of the printing finger U1. In this case, it is not necessary to prepare a drawing head or writing instrument 71 that can apply a masking agent.

As mentioned above, although several embodiment of this invention was described, the scope of the present invention is not limited to the above-mentioned embodiment, The range of the invention described in the claim is equal to the equivalent range. Including.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
In a drawing device for drawing on the fingernail,
A nail region detection unit that detects the nail region of the finger as a nail region based on an image obtained by photographing a masking unit formed by applying a masking agent to a region adjacent to the nail of the finger A drawing apparatus comprising:
<Claim 2>
A drawing section having a drawing tool for masking to apply the masking agent;
A drawing control unit for forming the masking unit using the masking drawing tool;
With
The nail region detection unit detects the nail region based on an image obtained by photographing the nail when the masking unit is not formed on the finger,
The drawing control unit controls the mask so that the masking agent is applied to a region of the finger adjacent to the nail region detected by the nail region detection unit. The drawing apparatus according to claim 1.
<Claim 3>
The drawing unit further includes at least one drawing tool for design for drawing the selected design on the nail,
A drawing data correction unit for correcting drawing data of the design drawn by the drawing tool for design;
The nail region detection unit acquires a first detection result of the nail region before the first drawing by the design drawing tool, and after the first drawing, by the design drawing tool. Obtaining a second detection result of the nail region before the second drawing,
The drawing data correction unit, when performing the second drawing with the drawing tool for design, the nail region based on a comparison between the first detection result and the second detection result of the nail region The drawing apparatus according to claim 2, wherein a movement amount of the position is calculated, and the drawing data is corrected in accordance with the movement amount.
<Claim 4>
The drawing data correction unit calculates a position movement amount of the nail region by matching the first detection result and the second detection result;
The drawing apparatus according to claim 3, wherein the masking unit is provided with a characteristic unit serving as an index for matching by the drawing data correction unit.
<Claim 5>
The drawing apparatus according to claim 3, wherein the masking agent has a color different from a color used in the design.
<Claim 6>
The drawing apparatus according to any one of claims 1 to 5, wherein the masking agent is a material that forms a film by drying after coating.
<Claim 7>
A drawing method of a drawing apparatus,
An operation of detecting the nail region of the finger as a nail region based on an image obtained by photographing a masking portion formed by applying a masking agent to a region adjacent to the nail of the finger. A drawing method characterized by.
<Claim 8>
The drawing apparatus has a drawing unit having a drawing tool for masking for applying the masking agent;
When the masking part is not formed on the finger, based on an image obtained by photographing the nail, the nail region is detected,
The drawing method according to claim 7, further comprising an operation of applying the masking agent to a region of the finger adjacent to the detected nail region using the masking drawing tool.
<Claim 9>
The drawing unit further includes at least one drawing tool for design for drawing the selected design on the nail,
In the detection of the nail region before the first drawing by the design drawing tool, the first detection result is acquired as the nail region,
In the detection of the nail region after the first drawing and before the second drawing by the design drawing tool, a second detection result is obtained as the nail region,
When performing the second drawing with the design drawing tool, the amount of movement of the position of the nail region is calculated based on a comparison between the first detection result and the second detection result of the nail region The drawing method according to claim 8, wherein the drawing data of the design drawn by the drawing tool for design is corrected in accordance with the movement amount.

DESCRIPTION OF SYMBOLS 1 Drawing apparatus 10 Apparatus main body 40 Drawing part 41 Drawing head 49 Carriage moving part 50 Shooting part 51 Camera 71 Writing instrument 80 Control apparatus 81 Control part 82 Storage part 811 Shooting control part 812 Nail information detection part 813 Drawing data generation part 813a Drawing data correction Part 814 display control part 815 drawing control part T nail

Claims (9)

In a drawing device for drawing on the fingernail,
A nail region detection unit that detects the nail region of the finger as a nail region based on an image obtained by photographing a masking unit formed by applying a masking agent to a region adjacent to the nail of the finger A drawing apparatus comprising: A drawing section having a drawing tool for masking to apply the masking agent;
A drawing control unit for forming the masking unit using the masking drawing tool;
With
The nail region detection unit detects the nail region based on an image obtained by photographing the nail when the masking unit is not formed on the finger,
The drawing control unit controls the mask so that the masking agent is applied to a region of the finger adjacent to the nail region detected by the nail region detection unit. The drawing apparatus according to claim 1. The drawing unit further includes at least one drawing tool for design for drawing the selected design on the nail,
A drawing data correction unit for correcting drawing data of the design drawn by the drawing tool for design;
The nail region detection unit acquires a first detection result of the nail region before the first drawing by the design drawing tool, and after the first drawing, by the design drawing tool. Obtaining a second detection result of the nail region before the second drawing,
The drawing data correction unit, when performing the second drawing with the drawing tool for design, the nail region based on a comparison between the first detection result and the second detection result of the nail region The drawing apparatus according to claim 2, wherein a movement amount of the position is calculated, and the drawing data is corrected in accordance with the movement amount. The drawing data correction unit calculates a position movement amount of the nail region by matching the first detection result and the second detection result;
The drawing apparatus according to claim 3, wherein the masking unit is provided with a characteristic unit serving as an index for matching by the drawing data correction unit.   The drawing apparatus according to claim 3, wherein the masking agent has a color different from a color used in the design.   The drawing apparatus according to any one of claims 1 to 5, wherein the masking agent is a material that forms a film by drying after coating. A drawing method of a drawing apparatus,
An operation of detecting the nail region of the finger as a nail region based on an image obtained by photographing a masking portion formed by applying a masking agent to a region adjacent to the nail of the finger. A drawing method characterized by. The drawing apparatus has a drawing unit having a drawing tool for masking for applying the masking agent;
When the masking part is not formed on the finger, based on an image obtained by photographing the nail, the nail region is detected,
The drawing method according to claim 7, further comprising an operation of applying the masking agent to a region of the finger adjacent to the detected nail region using the masking drawing tool. The drawing unit further includes at least one drawing tool for design for drawing the selected design on the nail,
In the detection of the nail region before the first drawing by the design drawing tool, the first detection result is acquired as the nail region,
In the detection of the nail region after the first drawing and before the second drawing by the design drawing tool, a second detection result is obtained as the nail region,
When performing the second drawing with the design drawing tool, the amount of movement of the position of the nail region is calculated based on a comparison between the first detection result and the second detection result of the nail region The drawing method according to claim 8, wherein the drawing data of the design drawn by the drawing tool for design is corrected in accordance with the movement amount.

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