TWM522613U - Hair dyeing tool - Google Patents

Description

Hair dyeing equipment

This creation is about a hair dyeing appliance.

As a hair dyeing device for applying a hair dye to hair such as hair, it is known that one end of the elongated plate-shaped grip portion has a comb portion and a brush portion (brush) and the other end has a grip portion. A hair dyeing device having a structure in which a rod-like tail portion extending in the extending direction of the grip portion is fine (for example, Patent Document 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-178716

The present invention provides a hair dyeing device comprising: a plate-shaped body portion including a first edge and a second edge extending in a direction intersecting the first edge; and a brush disposed along the first edge; And the comb or the second brush is disposed along the second edge; and the angle formed by the first edge and the second edge is 30 degrees or more and 120 degrees or less, and the first edge and the first portion are formed on the main body portion 2 The portion sandwiched by the edge constitutes a grip portion for the user to grip.

10‧‧‧ Body Department

11‧‧‧1st edge

12‧‧‧2nd edge

13‧‧‧3rd edge

15‧‧‧ gripping department

16‧‧‧ wall

16a‧‧‧Part 1

16b‧‧‧Part 2

16c‧‧‧Part 3

16d‧‧‧Part 4

17‧‧‧ recess

18a‧‧‧1st protrusion

18b‧‧‧2nd protrusion

19‧‧‧ recess

20‧‧‧ brushes

21‧‧‧Flocking Department

30‧‧‧ comb

31‧‧‧ comb teeth

41‧‧‧1st cylinder

42‧‧‧2nd tubular

50‧‧‧ hands

60‧‧‧ holes

61‧‧‧1st hole

62‧‧‧2nd hole

63‧‧‧3rd hole

71‧‧‧1st link

72‧‧‧2nd link

80‧‧‧Cavity Department

100‧‧‧ Hair dyeing appliances

111‧‧‧1st side

121‧‧‧2nd side

131‧‧‧3rd side

A‧‧‧ arrow

C‧‧‧ arrow

D‧‧‧ arrow

D1, D2, D3‧‧‧ thickness

L1‧‧‧ length

L2‧‧‧ length

L3‧‧‧ length

L4‧‧‧ length

L5‧‧‧ length

L6‧‧‧ length

X‧‧‧ line

‧‧‧‧ angle

Fig. 1 (a) and (b) are views showing the hair dyeing implement of the first embodiment.

2(a) to 2(c) are views showing the hair dyeing implement of the first embodiment.

Fig. 3 (a) and (b) are views showing the hair dyeing implement of the first embodiment.

Fig. 4 is a view showing the hair dyeing implement of the first embodiment.

Fig. 5 (a) to (c) are views showing an example of a method of gripping the hair dyeing implement of the first embodiment.

Fig. 6 (a) and (b) are views showing an example of a method of gripping the hair dyeing implement of the first embodiment.

Fig. 7 (a) and (b) are views showing the hair dyeing implement of the second embodiment.

Fig. 8 (a) and (b) are views showing the hair dyeing implement of the third embodiment.

Fig. 9 (a) and (b) are views showing the hair dyeing implement of the fourth embodiment.

Hereinafter, an embodiment of the present creation will be described using a drawing. In the drawings, the same components are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[First Embodiment]

Fig. 1 to Fig. 4 are views showing the hair dyeing appliance 100 of the first embodiment.

1(a) is a plan view.

Fig. 1(b) is a cross-sectional view taken along line B-B of Fig. 1(a).

Fig. 2(a) is a front view of the hair dyeing appliance 100 as seen from the direction of the arrow A of Fig. 1(a).

Fig. 2(b) is a side view of the hair dyeing appliance 100 as seen from the direction of the arrow C in Fig. 1(a).

Fig. 2(c) is a side view of the hair dyeing appliance 100 as seen from the direction of the arrow D in Fig. 1(a).

3(a) and 3(b) are perspective views of the hair dyeing device 100 as viewed from the front side.

Figure 4 is a rear view of the hair dye appliance 100.

5(a), 5(b), 5(c), 6(a), and 6(b) are diagrams showing the first embodiment. A schematic diagram of an example of a method of grasping the hair dyeing appliance 100.

The creators believe that there is a need for a hair dyeing appliance that can perform a hair dyeing operation with a feeling of being close to the feeling of applying a hair dye by hand. Therefore, the present embodiment relates to a hair dyeing appliance which is capable of performing a hair dyeing operation with a feeling close to the feeling of applying a hair dye by hand.

As shown in FIGS. 1 to 4, the hair dyeing appliance 100 of the present embodiment includes a plate-like main body portion 10 including a first edge 11 and a second edge 12 extending in a direction intersecting the first edge 11, and The brush 20 provided on the first edge 11 and the comb 30 (or the second brush) provided along the second edge 12 are provided. The angle formed by the first edge 11 and the second edge 12 (angle α in Fig. 4) is 30 degrees or more and 120 degrees or less. The portion of the main body portion 10 that is sandwiched by the first edge 11 and the second edge 12 constitutes a grip portion 15 that is gripped by a user.

According to the present embodiment, the hair dyeing operation can be performed with good operability close to the feeling of applying the hair dye by hand.

The details will be described below.

The hair dyeing appliance 100 is a device for applying a hair dye to hair such as hair, and has a plate-like main body portion 10.

As shown in Fig. 1(a), in the case of the present embodiment, the planar shape of the main body portion 10 has a fan shape.

The main body portion 10 includes, for example, a first edge 11 extending linearly, a second edge 12 extending linearly in a direction intersecting the first edge 11 , and one end connecting the first edge 11 and the second portion in plan view. An arcuate third edge 13 at one end of the rim 12.

A concave portion 17 is formed on at least one surface of the main body portion 10, and a peripheral portion of the main body portion 10 constitutes a wall portion 16 surrounding the concave portion 17. In other words, the main body portion 10 has a thick portion (wall portion 16) formed along the periphery of the main body portion 10, and a thin portion (a portion where the concave portion 17 is formed) which is surrounded by the thick portion and has a thinner thickness than the thick portion.

In the case of the present embodiment, as shown in FIGS. 1(a), (b) and 4, the body portion 10 is The front and back sides respectively have a wall portion 16 and a recess portion 17.

More specifically, for example, the body portion 10 is formed in a shape of a front-back symmetry (refer to FIG. 1(b)).

More specifically, the wall portion 16 is formed in a shape of a fan shape that is shaped outside the body portion 10, and the recess portion 17 is formed in a shape of a fan shape substantially similar to the body portion 10.

The wall portion 16 is formed continuously, for example, and surrounds the entire concave portion 17 without interruption. Furthermore, the wall portion 16 can also be formed intermittently (or partially intermittently).

The portion in which the concave portion 17 is formed in the main body portion 10 is formed, for example, in a flat shape (see FIG. 1(b)). In other words, the bottom surfaces of the recesses 17 of the front sides are formed flat and parallel to each other, respectively.

The wall portion 16 has a first portion 16a along the first edge 11 and a second portion 16b along the second edge. That is, the wall portion 16 has a first portion 16a extending linearly along the first edge 11 and a second portion 16b extending linearly along the second edge 12.

Further, at least one of the first portion 16a and the second portion 16b has an arched height increase from the both end portions toward the intermediate portion between the both end portions. More specifically, for example, both of the first portion 16a and the second portion 16b are arched in height from the both end portions toward the intermediate portion between the both end portions.

That is, as shown in FIG. 2(c), the first portion 16a gradually increases in height from both end portions toward the intermediate portion. In addition, the intermediate portion referred to herein does not necessarily mean a position in which the first portion 16a is divided into two in the extending direction (the center point in the extending direction of the first portion 16a), but refers to the first portion. The extending direction of 16a is located anywhere between the ends.

Similarly, as shown in Fig. 2(b), the second portion 16b gradually increases in height from the both end portions toward the intermediate portion. The intermediate portion referred to herein does not necessarily mean a position where the second portion 16b is divided into two portions in the extending direction thereof (the center point in the extending direction of the second portion 16b), and refers to the extension of the second portion 16b. Any position between the two ends in the direction.

Further, in other words, the wall thicknesses of the first portion 16a and the second portion 16b gradually increase from the both end portions toward the intermediate portion.

The wall portion 16 further has a third portion 16c extending in an arc along the third edge 13.

One end of the first portion 16a and one end of the third portion 16c are connected to each other, and the other end of the third portion 16c is connected to one end of the second portion 16b, and the other end of the second portion 16b is connected to the first portion 16a. The other ends are connected to each other.

As an example, the height of the third portion 16c is fixed between the ends of the third portion 16c (see FIG. 1(b)). In other words, the thickness of the third portion 16c is fixed over the entire third portion 16c.

Further, as an example, the height of the portion where the height of the first portion 16a is the lowest (the one end portion of the first portion 16a) is the same as the height of the third portion 16c (see FIG. 2(c)). Similarly, the height of the portion where the height of the second portion 16b is the lowest (the one end portion of the second portion 16b) is the same as the height of the third portion 16c (see Fig. 2(c)).

Further, as an example, the height of the other end portion of the first portion 16a is higher than the one end portion of the first portion 16a (see FIG. 2(c)). Similarly, the height of the other end portion of the second portion 16b is higher than the one end portion of the second portion 16b (see FIG. 2(b)). Further, the other end portion of the first portion 16a and the other end portion of the second portion 16b have the same height (see FIG. 2(a)).

As described above, the portion of the main body portion 10 that is sandwiched by the first edge 11 and the second edge 12 constitutes the grip portion 15 for the user to grip.

Further, in the case of the present embodiment, since not only the portion where the concave portion 17 is formed in the main body portion 10 but also the wall portion 16 can be gripped, the entire body portion 10 constitutes the grip portion 15.

In the case of the present embodiment, a plurality of protrusions are formed on the surface of the grip portion 15. More specifically, for example, a plurality of protrusions are formed on the bottom surface of the concave portion 17 of the front and back, respectively.

The plurality of protrusions formed in one of the concave portions 17 include, for example, one first protrusion 18a and a plurality of second protrusions 18b smaller than the first protrusion 18a.

Similarly, the plurality of protrusions formed on the other surface of the concave portion 17 include, for example, one first protrusion 18a and a plurality of second protrusions 18b smaller than the first protrusion 18a.

As an example, the heights of the first projections 18a and the second projections 18b are equal to each other, and the area of the first projections 18a is larger than the area of the second projections 18b.

The plurality of projections including the first projections 18a and the second projections 18b are uniformly dispersed on the bottom surface of the recessed portion 17, for example.

As shown in Fig. 1 (a) and Fig. 4, the first projection 18a is disposed, for example, at an angle bisector along the angle formed by the first edge 11 and the second edge 12 (corresponding to the BB line in Fig. 1(a), The position of line X) in Figure 4.

In other words, at least one of the plurality of protrusions (the first protrusions 18a) is disposed at a position along a bisector of the angle formed by the first edge 11 and the second edge 12, and the at least one protrusion (the first protrusion 18a) ) is larger than the other protrusions (second protrusions 18b).

In other words, the protrusion (the first protrusion 18a) located at the center of the body portion 10 is larger than the other protrusions (the second protrusion 18b).

Furthermore, in the present specification, the term "central protrusion" means that the plane shape of the protrusion located at the center is larger than the other protrusions, or the diameter is larger when the plane shape of the protrusion is circular, or is flat. When the shape is a polygon and other shapes, the maximum width is large.

The planar shape of the first projections 18a and the second projections 18b is not particularly limited. However, the planar shape of the first projection 18a and the second projection 18b is preferably circular so as to obtain the same grip when the portion of the main body portion 10 on which the recess 17 is formed is grasped from either direction.

As described above, the angle α between the first edge 11 and the second edge 12 is 30 degrees or more and 120 degrees or less in plan view. By setting this angle range, it is possible to sufficiently ensure the range in which the finger can be grasped, and the operation of the hair dyeing appliance 100 can be facilitated without contacting the brush 20 or the comb 30.

Especially when the angle α is an acute angle (less than 90 degrees), hold the hair dye with one hand. It is easy to handle the hair dyeing appliance 100 which is rotated in the state of 100. The angle α is further preferably 60 degrees or more and 80 degrees or less. In the case of the example shown in Fig. 1 (a) and Fig. 4, the angle α is 70 degrees.

Further, as an example, the planar shape of the main body portion 10 is an axisymmetric line in which the bisector of the angle formed by the first edge 11 and the second edge 12 is an axis of symmetry (see FIGS. 1(a) and 4).

Further, the side peripheral surface of the main body portion 10 includes a first side surface 111 along the first edge 11 (see FIG. 2( c )), a second side surface 121 along the second edge 12 (see FIG. 2( b )), and The third side surface 131 along the third edge 13 (see FIG. 5( a )).

The first side surface 111 and the second side surface 121 are each formed in a planar shape, for example, and are orthogonal to the plate surface of the portion of the main body portion 10 where the concave portion 17 is formed.

Further, the third side surface 131 is an arc-shaped surface along the third edge 13, and is vertically raised with respect to a plate surface of a portion where the concave portion 17 is formed in the main body portion 10.

The brush 20 is composed of a plurality of hairs that are planted on the body portion 10 along the first edge 11. More specifically, the brush 20 is configured by planting the plurality of root hairs on the main body portion 10 so as to protrude from the first side surface 111. For example, the plurality of root hairs protrude in a direction orthogonal to the first side face 111 and extend in parallel with respect to the plate surface of the body portion 10.

The brush 20 has a hair-planting portion 21 composed of a bundle of hairs of a plurality of hairs, for example, at a plurality of locations. More specifically, the hair-planting portion 21 is arranged in a specific number of rows of one or more rows. As an example, as shown in FIG. 2(c), FIG. 3(a) and the like, the brush 20 is composed of two rows of hair-planting portions 21.

Further, the comb 30 is composed of a plurality of comb teeth 31 provided at a portion of the main body portion 10 along the second edge 12. More specifically, the comb 30 is configured by being provided on the main body portion 10 such that the plurality of comb teeth 31 protrude from the second side surface 121. For example, the plurality of comb teeth 31 protrude in a direction orthogonal to the second side surface 121 and extend in parallel with respect to the plate surface of the body portion 10.

The comb teeth 31 are arranged in a specific number of rows or more. As an example, as shown in FIG. 2(b), FIG. 3(b) and the like, the comb 30 is constituted by one row of comb teeth 31.

Further, the material of the main body portion 10 is not particularly limited, and for example, it can be a synthetic resin. As an example, the entire body portion 10 is integrally molded of a synthetic resin.

The material constituting the hair of the brush 20 is not particularly limited, and for example, it can be used as a synthetic resin. For example, one end of the hair bundle constituting the hair of the hair-planting portion 21 is inserted into a hole formed in the body portion 10 and followed by an adhesive to constitute the hair-planting portion 21.

Further, the material of the comb teeth 31 constituting the comb 30 is not particularly limited, and for example, it can be a synthetic resin. As an example, the main body portion 10 and the comb teeth 31 constituting the comb 30 are integrally molded of synthetic resin.

The hair dyeing appliance 100 has a small structure which is provided in a general hair dyeing appliance and has no tail portion. Further, the hair dyeing appliance 100 is configured to have a palm size that is substantially closed to the palm of one hand. Further, the entire body portion 10, the brush 20, and the comb 30 of the hair dyeing appliance 100 are formed into a flat shape.

The hair dyeing appliance 100 is configured as described above.

Next, an example of a method of using the hair dye appliance 100 will be described.

When the hair dye is applied to the hair using the hair dyeing device 100, first, after the hair is combed by the comb 30 in advance and the hair is appropriately separated, the hair dye is taken up by the brush 20 and applied to the hair.

At this time, since the portion grasped by the hand is close to the brush 20, the force can be transmitted to the brush 20 more directly. That is, the hair dyeing operation can be performed in a manner close to the feeling of applying the hair dye by hand. Therefore, the hair dye can be easily pushed to the root of the hair only by pushing with a light force, so that the hair dye can be more evenly distributed from the root to the tip.

Further, since the portion grasped by the hand is close to the brush 20, not only the force is easily transmitted, but also the brush 20 can be easily moved to the target position. In particular, when the hair dye is applied to the head or the side of the head as in the case of the head or the side of the head, the workability in the case where the hair of the portion is not confirmed in the usual direction is improved.

Moreover, since the hair dyeing device 100 can be pushed with a light force, the dyeing episode can be performed. Therefore, it is easy to take a sufficient hair dye to the brush 20 at a time and apply it, and therefore, it is also expected that the working time can be shortened.

Here, the hair dyeing appliance 100 is grasped by the finger of the hand 50, for example, by the grasping method as shown in FIGS. 5(a) and 5(b) or the grasping method shown in FIG. 5(c). The portion of the main body portion 10 where the concave portion 17 is formed is formed so that gripping can be performed. Since the recessed portion 17 is surrounded by the wall portion 16, it is possible to suppress the finger from slipping off from the recessed portion 17 and to stably hold the hair dyeing appliance 100 when performing any of the gripping methods.

Even if it is assumed that the finger slides with respect to the bottom surface of the concave portion 17, the sliding of the finger can be blocked by the wall portion 16, so that the body portion 10 is not grasped with excessive grip force in such a manner that the finger does not slide with respect to the concave portion 17, and Even with a lighter force, it can be grasped stably and stably.

Moreover, since the hair dyeing appliance 100 is a palm size, it is easy to hold, and it is not easy to be fatigued in the case of performing a long-term hair dyeing operation.

Further, since the hair dyeing appliance 100 has a palm size and is easy to hold, and the entire hair dyeing device 100 is formed into a flat shape, the orientation of the hair dyeing appliance 100 can be easily switched with one hand. Therefore, switching suitable for the gripping method using the comb 30 and the gripping method suitable for using the brush 20 can be smoothly performed.

Moreover, even when the brush 20 is used, it is possible to easily switch to various orientations (for example, the gripping methods shown in FIGS. 5(a) and 5(b) and FIG. 5(c). The switching method of the gripping method).

Similarly, even when the comb 30 is used, switching to various orientations can be easily performed.

Since the hair dyeing appliance 100 is formed into a flat shape as a whole, even in a state of being held by one hand, even by rotating the hair dyeing appliance 100 in a plane parallel to the plate surface of the main body portion 10, The switching of the orientation of the hair dyeing appliance 100 is easily performed.

Further, a plurality of protrusions (first protrusions 18a and plural numbers) are formed on the bottom surface of the concave portion 17 Since the second projections 18b) are formed, it is possible to suppress the slip of the finger with respect to the bottom surface of the recessed portion 17.

Further, at least one of the plurality of protrusions (the first protrusions 18a) is disposed at a position along a bisector of the angle formed by the first edge 11 and the second edge 12, and the first protrusion 18a is larger than the other protrusions (the first protrusion 18a) 2 protrusions 18b). Therefore, since it is easy to recognize the position of the first projection 18a as the home position of the finger, when the hair dyeing appliance 100 is grasped in various directions, the well-balanced position can be smoothly grasped (along the angle bisector) position).

Further, for example, as shown in FIG. 6(a), it is also possible to grasp by grasping the wall portion 16 having a thickness larger than a portion where the concave portion 17 is formed. Therefore, by constantly changing the thickness of the portion to be grasped, the tension of the hand 50 of the hair dyeing appliance 100 can be alleviated, so that it is less likely to be fatigued even when the hair dyeing operation is performed for a long period of time.

Further, since the first portion 16a of the wall portion 16 has an arched height from the both end portions toward the intermediate portion, when the gripping method shown in Fig. 6(a) is performed, the hook portion is formed with respect to the finger. shape. In other words, it is possible to prevent the first portion 16a from slipping from the finger and slipping to the left of FIG. 6(a).

Further, since the both end portions of the first portion 16a are lower than the intermediate portion, when the orientation of the hair dyeing device 100 is changed by the above-described rotation operation, the end portion of the first portion 16a is less likely to catch the hand, and the operation can be smoothly performed. Perform a rotation operation.

Further, since the main body portion 10 is formed in a shape including a fan shape of the arcuate third edge, when the third edge 13 is moved toward the palm side as shown in FIG. 6(a), the main body portion is formed in the main body portion. Since the portion along the third edge 13 is attached to the palm, the grip of the hair dyeing appliance 100 can be obtained, and the feeling of the third edge 13 can be made comfortable.

Further, by moving the finger (thumb or the like) along the third edge 13 (e.g., the arc-shaped third portion 16c along the wall portion 16) as indicated by the arrow in Fig. 6(b), it is possible to easily achieve a high degree of freedom. Change the position of the finger to a position that is easy for the user to grasp. Alternatively, the same grip can be obtained when the finger is placed at any position along the third edge 13.

Furthermore, the shape of the third edge 13 is not limited to a smooth arc shape, and may be It has an arc-shaped shape with irregularities.

Here, an example of the size of each part of the hair dyeing appliance 100 will be described.

The length L1 (FIG. 4) of the first edge 11 can be, for example, 20 mm or more and 100 mm or less.

The length L2 (FIG. 4) of the second edge 12 can be, for example, 20 mm or more and 100 mm or less.

The length L3 (FIG. 4) of the range in which the brush 20 is formed can be, for example, 18 mm or more and 98 mm or less.

The length L4 (FIG. 4) of the range in which the comb 30 is formed can be, for example, 18 mm or more and 98 mm or less.

The length L5 (the length of the portion protruding from the main body portion 10) (FIG. 4) constituting the hair of the brush 20 can be, for example, 5 mm or more and 50 mm or less.

The length L6 (FIG. 4) of the comb teeth 31 constituting the comb 30 can be, for example, 5 mm or more and 50 mm or less.

By setting each part of the hair dyeing appliance 100 to such a size, the hair dyeing appliance 100 can be set to a palm size, and handling of the hair dyeing appliance 100 can be facilitated.

Further, by setting the lengths L3 and L5 to the above range, a sufficient amount of the hair dye can be placed on the brush 20 at one time and applied to the hair.

The thickness of the portion in which the concave portion 17 is formed in the main body portion 10 (thickness other than the first projection 18a and the second projection 18b) can be, for example, 1 mm or more and 5 mm or less.

Thereby, it is possible to manufacture a hair dyeing tool having a good grip with a portion where the concave portion 17 is formed in the main body portion 10.

The thickness of the portion in which the wall portion 16 is formed in the main body portion 10 (thickness D1, D2, D3, and the like shown in Fig. 1(b)) can be, for example, 3 mm or more and 20 mm or less.

Thereby, it is possible to manufacture a hair dyeing tool having a good grip property in a portion where the wall portion 16 is formed in the main body portion 10.

Further, it is possible to establish the grip strength when gripping the portion where the concave portion 17 is formed in the main body portion 10 and the portion where the wall portion 16 is formed by the main body portion 100. Specifically, because It is possible to partially differ from the muscle of the hand 50 used when gripping the portion of the body portion 10 in which the concave portion 17 is formed, and the portion of the body portion 10 that is formed with the wall portion 16, so that it is often changed by grasping By the thickness of the part, the muscles of the hand 50 can be used in a well-balanced manner, and the hair dyeing operation can be continued, and the fatigue of the hand caused by the hair dyeing operation can be suppressed.

The height of the wall portion 16 (the height from the bottom surface of the concave portion 17) can be, for example, 1 mm or more and 10 mm or less.

Thereby, since the wall portion 16 functions as a blocking portion as appropriate, it is possible to prevent the finger gripped on the portion where the concave portion 17 is formed in the main body portion 10 from slipping and falling off from the concave portion 17.

More specifically, the height of the first portion 16a of the wall portion 16 (the maximum height from the bottom surface of the concave portion 17) can be, for example, 1 mm or more and 10 mm or less.

The height of the second portion 16b of the wall portion 16 (the maximum height from the bottom surface of the concave portion 17) can be, for example, 1 mm or more and 10 mm or less.

The height of the third portion 16c of the wall portion 16 (the height from the bottom surface of the concave portion 17) can be, for example, 1 mm or more and 5 mm or less.

The height ratio of the portion (the middle portion) where the height of the first portion 16a is the largest and the portion (the one end portion) having the smallest height can be set, for example, in the range of 1:1 to 1:3.

Thereby, it is possible to improve the gripability when the gripping method of FIG. 6(a) is performed, and it is possible to suppress the positional deviation or the peeling of the main body portion 10 from slipping on the hand.

Similarly, the height ratio of the portion (the intermediate portion) having the highest height of the second portion 16b to the portion having the smallest height (the one end portion) can be, for example, in the range of 1:1 to 1:3.

The radius of curvature of the third edge 13 when the main body portion 10 is viewed in plan may be, for example, 20 mm or more and 60 mm or less. Thereby, the third side surface 131 can be favorably applied to the palm.

Here, the length dimension of the portion having the longest length in the plan view of the main body portion 10 (hereinafter referred to as the maximum length of the main body portion 10) is preferably 1.5 times the length of the shorter one of the first edge 11 and the second edge 12. the following.

In the case of the present embodiment, for example, the length of the first edge 11 and the length of the second edge 12 are equal to each other. Therefore, the maximum length of the main body portion 10 is 1.5 times or less the length of the first edge 11 or the second edge 12.

In the case where the first edge 11 and the second edge 12 cross each other as in the case of the present embodiment, for example, the intersection of the first edge 11 and the second edge 12 is used as a reference point, and the body portion 10 can be used from the reference. The distance from the farthest portion is taken as the maximum length of the body portion 10. For example, in FIG. 1(a), the length dimension of the portion of the body portion 10 substantially along the BB line corresponds to the maximum length of the body portion 10, and in FIG. 4, the length of the portion of the body portion 10 substantially along the line X. The size corresponds to the maximum length of the body portion 10.

Further, although not shown in the drawings, there is a possibility that the first edge 11 and the second edge 12 do not cross each other and a fourth edge exists between the first edge 11 and the second edge 12 (the grip portion 15 is sandwiched) In the case of the edge on the opposite side of the third edge 13 therebetween. In this case, when the fourth edge is linear, for example, the intersection of the fourth edge and the first edge 11 or the intersection of the fourth edge and the second edge is used as a reference point, and the main body 10 can be used from the reference. The distance from the farthest portion is taken as the maximum length of the body portion 10.

However, in the main body portion 10, which portion having the largest length changes depending on the shape of the main body portion 10.

In this way, the configuration in which the maximum length of the main body portion 10 is 1.5 times or less the length of the shorter one of the first edge 11 and the second edge 12 is not equivalent to the above-mentioned Patent Document 1 (Japanese Patent Laid-Open No. 2008-178716) The structure of the structure of the tail portion (the strip-shaped portion of the strip) in the general hair dyeing device.

In other words, the absence of the tail portion means that the amount of protrusion of the main body portion 10 on the side of the third edge 13 is small in the present embodiment. Therefore, the maximum length of the main body portion 10 is not extremely higher than that of the first edge 11 and the second edge 12. The land becomes longer.

By adopting the configuration of the main body portion 10, it is possible to change the orientation of the main body portion 10 while holding the main body portion 10 with one hand, or to switch the use of the brush 20 with the comb 30. In use, the interference between the body portion 10 and the hand is suppressed. Therefore, good operability of the body portion 10 (good operability at the time of a rotation operation, etc.) can be obtained. Further, when the third edge portion 13 is gripped on the body portion 10 toward the palm side, interference between the third edge portion 13 and the palm can be suppressed. In other words, it is easy to grasp while the third edge 13 hits the palm, or to grip the third edge 13 from the palm.

Further, the length dimension of the portion having the longest length in the plan view of the main body portion 10 (the maximum length of the main body portion 10) is preferably 100 mm or less.

Since the main body portion 10 has such a configuration, the main body portion 10 has a palm size. Therefore, the orientation of the main body portion 10 can be changed while holding the main body portion 10 with one hand, or the use of the switching brush 20 can be switched. When the comb 30 is used, the interference between the body portion 10 and the hand is suppressed. Therefore, good operability of the body portion 10 (good operability at the time of a rotation operation, etc.) can be obtained.

Further, when the main body portion 10 is gripped while the third edge 13 side faces the palm side, interference between the main body portion 10 and the palm can be suppressed. In other words, it is easy to grasp while the third edge 13 hits the palm, or to grip the third edge 13 from the palm.

According to the first embodiment described above, the hair dyeing appliance 100 includes the plate-shaped main body portion 10 including the first edge 11 and the second edge 12 extending in the direction intersecting the first edge 11, and the first edge along the first edge 11 provided with a brush 20 and a comb 30 disposed along the second edge 12. Further, the angle formed by the first edge 11 and the second edge 12 is 30 degrees or more and 120 degrees or less, and the portion of the main body portion 10 sandwiched by the first edge 11 and the second edge 12 constitutes a grip for the user. Grip portion 15.

Therefore, since the distance between the portion grasped by the hand and the brush 20 is close to each other, the hair dyeing operation can be performed with good operability close to the feeling of applying the hair dye by hand.

The angular range (30 degrees or more and 120 degrees or less) formed by the first edge 11 and the second edge 12 is an angle range which is not too narrow but not too wide in consideration of the operability of the hair dyeing appliance 100. This angle is a sufficiently wide angle to which the body portion 10 can be stably gripped, and For example, it is possible to obtain a moderately narrow angle of good operability when the orientation of the main body portion 10 is changed in a state in which the main body portion 10 is gripped with one hand.

In addition, the hair dyeing appliance 100 does not have a tail portion which is generally used for hair dyeing appliances, but the hair dyeing appliance 100 can be said to have a structure in which the hair dyeing operation can be performed more satisfactorily without the tail portion.

Moreover, the length dimension of the portion having the longest length in the plan view of the main body portion 10 (referred to as the maximum length of the main body portion 10) is set to be 1.5 times or less the length of the shorter one of the first edge 11 and the second edge 12. Therefore, the orientation of the main body portion 10 can be changed in a state where the main body portion 10 is held by one hand, or the interference between the main body portion 10 and the hand can be suppressed when the use of the switching brush 20 and the use of the comb 30 are switched. Therefore, good operability of the body portion 10 can be obtained. Further, when the main edge portion 10 is gripped by the third edge portion 13 toward the palm side, interference between the third edge portion 13 and the palm can be suppressed. In other words, it is easy to grasp while the third edge 13 hits the palm, or to grip the third edge 13 from the palm.

Moreover, since the length dimension of the portion having the longest length in the plan view of the main body portion 10 (referred to as the maximum length of the main body portion 10) is 100 mm or less, the main body portion 10 becomes the palm size, so that it can be held by one hand. The orientation of the body portion 10 is changed in the state of the body portion 10, or the interference between the body portion 10 and the hand is suppressed when the use of the brush 20 is switched and the use of the comb 30 is used. Therefore, good operability of the body portion 10 can be obtained. Further, when the main body portion 10 is gripped while the third edge 13 side faces the palm side, interference between the main body portion 10 and the palm can be suppressed. In other words, it is easy to grasp while the third edge 13 hits the palm, or to grip the third edge 13 from the palm.

Further, a concave portion 17 is formed on at least one surface of the main body portion 10, and a peripheral portion of the main body portion 10 constitutes a wall portion 16 surrounding the concave portion 17. Therefore, the gripping property of the portion where the concave portion 17 is formed in the main body portion 10 can be improved, and the positional deviation of the finger can be suppressed by the wall portion 16.

Further, the wall portion 16 has a first portion 16a along the first edge 11 and a second portion 16b along the second edge 12, and at least one of the first portion 16a and the second portion 16b faces from both ends thereof. The middle portion between the end portions is arched to increase the height.

Therefore, at least one of the first portion 16a and the second portion 16b is low in both ends, so that it is possible to suppress the occurrence of the rotation operation and to grasp at least the first portion 16a and the second portion 16b. In one case, the fingers are easily caught, so that good grip can be obtained.

Further, the main body portion 10 is formed in a shape including a fan shape that connects the arcuate third edge 13 which is one end of the first edge 11 and one end of the second edge 12 in plan view.

Therefore, when the grasping method of the third edge 13 toward the palm side is performed, since the portion of the main body portion 10 along the third edge 13 is attached to the palm, the gripping property of the hair dyeing appliance 100 is further improved.

Further, when the hair dyeing appliance 100 is rotated in the plane of the plate surface of the main body portion 10 and the hair dyeing device 100 is replaced, the interference between the main body portion 10 and the palm can be suppressed.

Further, when the angle ? formed by the first edge 11 and the second edge 12 is an acute angle, it is possible to obtain more excellent grip and operability of the main body portion 10 (operability during rotation operation, etc.).

Further, by forming a plurality of protrusions (for example, the first protrusions 18a and the plurality of second protrusions 18b) on the surface of the grip portion 15, the grip of the grip portion 15 is improved, and the finger can be suppressed from being gripped. The portion 15 slips.

Further, at least one of the plurality of protrusions (the first protrusions 18a) is disposed at a position along a bisector of an angle formed by the first edge 11 and the second edge, and the at least one protrusion is larger than the other protrusions.

Therefore, it is easy to recognize the position of at least one protrusion (first protrusion 18a) larger than the other protrusions as the rest position of the finger, so that when the hair dyeing appliance 100 is grasped in various directions, the balance can be smoothly grasped smoothly. Position (position along the bisector of the corner).

Further, it is possible to improve the gripability of the portion (the portion along the bisector of the angle) which is highly likely to be grasped by the fingers.

Further, since the planar shape of the main body portion 10 is an axis symmetry in which the angle bisector of the angle formed by the first edge 11 and the second edge 12 is an axis of symmetry, when the brush 20 provided along the first edge 11 is used, Both of the hairbrushes 30 provided along the second edge 12 can grip the hair dyeing appliance 100 with the same gripping ability, and can operate with equivalent operability.

[Second Embodiment]

Fig. 7 is a view showing the hair dyeing appliance 100 according to the second embodiment, wherein (a) is a plan view and (b) is a cross-sectional view taken along line B-B of (a).

The hair dyeing appliance 100 of the present embodiment is different from the hair dyeing appliance 100 of the above-described first embodiment in the other aspects described below, and is configured in the same manner as the hair dyeing appliance 100 of the first embodiment described above.

In the case of the present embodiment, the main body portion 10 is formed with a first hole 61 that penetrates the front surface of the main body portion 10. The planar shape of the first hole 61 is not particularly limited. However, in the example of FIG. 7, the chord has a semicircular shape along the first edge 11.

Further, in the main body portion 10, the first projections 18a and the second projections 18b may be formed, and the first projections 18a and the second projections 18b may be formed.

The main body portion 10 includes a cylindrical first tubular portion 41 that is provided inside the first hole 61. The first tubular portion 41 is connected to the first portion 16a, for example, at the first connecting portion 71. The axial direction of the first tubular portion 41 is orthogonal to the plate surface of the body portion 10.

The main body portion 10 includes a second cylindrical portion 42 that is disposed coaxially with the first tubular portion 41 in the first tubular portion 41 . The second tubular portion 42 is coupled to the first tubular portion 41 by, for example, the pair of second connecting portions 72 .

The space between the inner circumferential surface of the first tubular portion 41 and the outer circumferential surface of the second tubular portion 42 constitutes a second hole 62 that is continuous in the cross section of the main body 10 and has a cross section.

The space inside the inner circumferential surface of the second tubular portion 42 constitutes a third hole 63 that is formed in a circular shape passing through the front surface of the main body portion 10.

As shown in FIG. 7( b ), for example, the length of the second tubular portion 42 in the axial direction is shorter than the first tubular portion 41 . The axial length of the first tubular portion 41 protrudes in a direction orthogonal to the plate surface of the main body portion 10 from both axial ends of the second tubular portion 42.

Therefore, the stability of the finger when the finger is placed against the second hole 62 is good, and the rotational operability when the finger is placed against the second hole 62 and the hair dyeing device 100 is rotated is also improved.

In the case of the present embodiment, the concave portion 17 has a strip shape curved along the third edge 13, and the wall portion 16 includes a fourth portion 16d in which the concave portion 17 is interposed therebetween and is curved toward the third portion 16c. The concave portion 17 is surrounded by the first portion 16a, the second portion 16b, the third portion 16c, and the fourth portion 16d.

The fourth portion 16d constitutes a part of the edge of the first hole 61.

According to the second embodiment described above, the same effects as those of the first embodiment described above can be obtained by the configuration similar to that of the first embodiment described above, and the following effects can be obtained.

In the case of the present embodiment, since the first hole 61, the second hole 62, and the third hole 63 penetrating the front surface of the main body portion 10 are formed, when the hair dyeing device 100 is washed and reused, the hair dye is used. Further, since the cleaning liquid (water or the like) can be easily removed, the cleaning performance of the hair dyeing appliance 100 can be expected to be improved.

Further, in the main body portion 10, the circular third hole 63, the annular second hole 62, and the semicircular first hole 61 are formed, so that the hair dyeing tool 100 can be smoothly rotated when the hair dyeing device 100 is rotated.

[Third embodiment]

Fig. 8 is a view showing a hair dyeing appliance 100 according to a third embodiment, wherein (a) is a plan view and (b) is a cross-sectional view taken along line B-B of (a).

The hair dyeing appliance 100 of the present embodiment is different from the hair dyeing appliance 100 of the above-described first embodiment in the other aspects described below, and is configured in the same manner as the hair dyeing appliance 100 of the first embodiment described above.

In the case of the present embodiment, the wall portion 16 is formed only at a portion along the third edge 13. That is, the wall portion 16 is constituted by the arcuate third portion 16c along the third edge 13.

Further, no protrusion is formed on the front surface of the grip portion 15, and instead, a plurality of recesses 19 for respectively positioning the fingertips are formed.

The concave portion 19 has a plurality of (for example, three) portions arranged along the BB line as shown in FIG. 8(a), and a plurality of (for example, three: but one of them are arranged along the first edge 11). Along the BB line, a plurality of (for example, three: but one of them are arranged along the BB line and arranged along the first edge 11) are arranged along the second edge 12, and a total of seven are arranged.

However, the number and arrangement of the recesses 19 are not limited to this example.

The main body portion 10 is formed to have substantially the same thickness except for the portion where the wall portion 16 is formed, and the same gripping property can be obtained for any portion of the main body portion 10.

Further, the main body portion 10 has a hollow structure having a cavity portion 80 as shown in, for example, FIG. 8(b).

According to the third embodiment as described above, the same effects as those of the first embodiment described above can be obtained by the configuration similar to that of the first embodiment described above.

Further, since the concave portion 19 is formed on the surface of the grip portion 15, it is easy to position the finger with respect to the concave portion 19.

[Fourth embodiment]

Fig. 9 is a view showing a hair dyeing appliance 100 according to a fourth embodiment, wherein (a) is a plan view and (b) is a cross-sectional view taken along line B-B of (a).

The hair dyeing appliance 100 of the present embodiment is different from the hair dyeing appliance 100 of the above-described first embodiment in the other aspects described below, and is configured in the same manner as the hair dyeing appliance 100 of the first embodiment described above.

In the case of the present embodiment, the planar shape of the main body portion 10 has a substantially triangular shape (for example, a rounded triangle). Therefore, the third edge 13 and the third portion 16c are in a straight line Extend the shape.

In the case of the present embodiment, the main body portion 10 is formed with a hole 60 penetrating the front surface of the main body portion 10. The planar shape of the hole 60 is not particularly limited, but is formed to be substantially similar to the outer shape of the body portion 10 in the example of Fig. 9(a). That is, the hole 60 has, for example, a substantially triangular shape (for example, a rounded triangle). The hole 60 is disposed, for example, at a central portion of the body portion 10.

According to the fourth embodiment described above, the same effects as those of the first embodiment described above can be obtained by the configuration similar to that of the first embodiment described above, and the following effects can be obtained.

In the case of the present embodiment, since the main body portion 10 is formed with the hole 60 penetrating the front side thereof, the hair dye or the washing liquid (water or the like) can be easily removed when the hair dyeing device 100 is washed and reused. The cleaning performance of the hair dyeing appliance 100 can be expected to be improved.

Moreover, since the hair dyeing tool 100 can be easily rotated by using the hole 60 as a rotating shaft, it can rotate smoothly when the hair dyeing implement 100 is rotated.

Further, in each of the above embodiments, the first edge 11 is extended in a straight line, but the first edge 11 may be extended in a planar shape such as an arc shape, a wavy line shape, a zigzag shape, or a crank shape. In this case, the direction in which the first edge 11 extends in the entirety can be regarded as the direction in which the straight line connecting the both ends of the first edge 11 extends.

Similarly, the second edge 12 can also extend in a planar shape such as an arc, a wavy line, a zigzag shape, or a crank shape. In these cases, the overall extending direction of the second edge 12 can be regarded as connecting the second edge 12 . The direction in which the straight lines at both ends extend.

Further, the extension of the second edge 12 in the direction intersecting the first edge 11 means that the extending direction of the straight line connecting the both ends of the first edge 11 and the extending direction of the straight line connecting the both ends of the second edge 12 intersect each other.

Further, in each of the above embodiments, the other end portion of the first edge 11 and the other end portion of the second edge 12 are connected to each other. However, the first edge 11 and the second edge 12 may be separated from each other. from. That is, another edge (fourth edge) connecting the first edge 11 and the second edge 12 may be interposed between the first edge 11 and the second edge 12.

In this case, at the fourth edge, the hair constituting the brush 20 (the hair-planting portion 21 or the like) may be absent, and the hair constituting a part of the brush 20 (the hair-planting portion 21 or the like) may be present.

Similarly, at the fourth edge, the comb teeth 31 constituting the comb 30 may not exist, and the comb teeth 31 constituting one of the combs 30 may be present.

Further, similarly, between the first edge 11 and the third edge, and between the second edge 12 and the third edge 13, other edges (the fifth edge and the sixth edge) may be interposed. At the edge, there may be a hair (a tufting portion 21 or the like) constituting a part of the brush 20 or a comb tooth 31 constituting a part of the comb 30.

Moreover, in each of the above-described embodiments, the planar shape of the main body portion 10 is a fan shape or a triangular shape. However, the planar shape of the main body portion 10 is not limited to these examples.

For example, the planar shape of the body portion 10 may be a heart shape or the like. In this case, the third edge 13 includes two convex curved portions that are convex toward the outer side of the body portion 10 in plan view.

In this manner, the main body portion 10 includes a third edge 13 that connects one end of the first edge 11 and the second edge 12 to each other at the farthest end from each other in plan view, and the third edge 13 can be oriented in a plan view. The shape of the convex curve portion (one or a plurality of convex curved portions) convex on the outer side of the body portion 10.

In the case of such a shape, the feeling of the third edge 13 is made comfortable, and a good feeling of fit with respect to the third edge 13 of the palm can also be obtained.

Further, in each of the above embodiments, the example in which the comb 30 is provided along the second edge 12 has been described, but the second brush may be provided along the second edge 12. In this case, the hair constituting the brush 20 and the hair constituting the second brush can be different in at least one of hardness (bending rigidity), length, and planting density. Thereby, it is possible to obtain a different feeling of use (operation feeling) in the brush 20 and the second brush, and therefore it is possible to separate according to the location of the hair dyeing agent or the user's preference. Use the brush 20 and the second brush.

Further, each of the above aspects can be combined within a range in which the contents are not opposite.

For example, a plurality of protrusions (the first protrusions 18a and the second protrusions 18b, etc.) may be formed in the grip portion 15 of the hair dyeing appliance 100 in the form shown in FIGS. 7 to 9.

Alternatively, the hairpin 100 other than the embodiment shown in FIG. 7 may be provided with the first hole 61, the second hole 62, the third hole 63, the first tubular portion 41, the second tubular portion 42, and the first connection. At least one of the portion 71 and the second connecting portion 72 is configured.

Alternatively, the hair piece 100 may be formed in the hair dyeing appliance 100 other than the form shown in FIG.

Alternatively, the hair 60 may be formed in the hair dyeing appliance 100 in a form other than that shown in FIG.

Some or all of the above various aspects can be specified as described below. However, each of the above aspects is not limited to the following description.

<1>

A hair dyeing device comprising: a plate-shaped body portion including a first edge and a second edge extending in a direction intersecting the first edge; a brush disposed along the first edge; and a comb or a second brush disposed along the second edge; and an angle formed by the first edge and the second edge is 30 degrees or more and 120 degrees or less, and the first edge and the second portion are formed in the main body portion The portion sandwiched by the edge constitutes a grip for the user to grip.

<2>

The hair dyeing device according to <1>, wherein a length dimension of a portion of the main body portion that has the longest length in a plan view is 1.5 of a length of a shorter one of the first edge and the second edge. Less than the following.

<3>

The hair dyeing appliance according to <1> or <2>, wherein a length of the longest portion of the main body portion in a plan view is 100 mm or less.

<4>

The hair dyeing appliance according to any one of the items 1 to 3, wherein a concave portion is formed on at least one surface of the main body portion, and a peripheral portion of the main body portion constitutes a wall portion surrounding the concave portion.

<5>

A hair dyeing appliance according to <4>, wherein the wall portion is continuously formed.

<6>

The hair dyeing device according to <4>, wherein the wall portion has a first portion along the first edge and a second portion along the second edge, and at least the first portion and the second portion One has an arched height from the opposite end portions toward the intermediate portion between the both end portions.

<7>

The hair dyeing appliance according to <6>, wherein both the first portion and the second portion are increased in arch shape from the both end portions toward the intermediate portion between the both end portions.

<8>

The hair dyeing appliance according to any one of the aspects of the present invention, wherein, in a plan view, the main body portion includes a first end that connects one of the ends of the first edge and the second edge to each other The edge of the third surface includes a convex curved portion that is convex toward the outer side of the main body portion in plan view.

<9>

A hair dyeing appliance according to any one of <1> to <7>, wherein The body portion is formed in a shape including a fan shape connecting a third edge of one end of the first edge and one end of the second edge.

<10>

The hair dyeing appliance according to any one of <1>, wherein the main body portion is formed to include a triangle connecting a third edge of one end of the first edge and one end of the second edge in a plan view. The shape of the shape.

<11>

The hair dyeing appliance according to any one of <1> to <10> wherein the angle formed by the first edge and the second edge is an acute angle.

<12>

The hair dyeing appliance according to any one of <1> to <11, wherein a plurality of protrusions are formed on a surface of the grip portion.

<13>

[12] The hair dyeing device according to <12, wherein at least one of the plurality of protrusions is disposed at a position along a bisector of an angle formed by the first edge and the second edge, and the at least one protrusion is larger than the other Protrusion.

<14>

The hair dyeing tool according to any one of the aspects of the invention, wherein the planar shape of the main body portion is an axisymmetric shape in which an angle bisector of an angle formed by the first edge and the second edge is an axis of symmetry.

<15>

The hair dyeing appliance according to any one of <1> to <14> wherein a plurality of concave portions are formed on a surface of the grip portion.

<16>

The hair dyeing appliance according to any one of <1> to <15, wherein the main body portion is formed with a hole penetrating the front surface of the main body portion.

10‧‧‧ Body Department

11‧‧‧1st edge

12‧‧‧2nd edge

13‧‧‧3rd edge

15‧‧‧ gripping department

16‧‧‧ wall

16a‧‧‧Part 1

16b‧‧‧Part 2

16c‧‧‧Part 3

17‧‧‧ recess

18a‧‧‧1st protrusion

18b‧‧‧2nd protrusion

20‧‧‧ brushes

21‧‧‧Flocking Department

30‧‧‧ comb

31‧‧‧ comb teeth

100‧‧‧ Hair dyeing appliances

131‧‧‧3rd side

A‧‧‧ arrow

C‧‧‧ arrow

D‧‧‧ arrow

D1, D2, D3‧‧‧ thickness

Claims (11)

A hair dyeing device comprising: a plate-shaped body portion including a first edge and a second edge extending in a direction intersecting the first edge; a brush disposed along the first edge; and a comb or a second brush disposed along the second edge; and an angle formed by the first edge and the second edge is 30 degrees or more and 120 degrees or less, and the first edge and the second portion are formed in the main body portion The portion sandwiched by the edge constitutes a grip for the user to grip. The hair dyeing device according to claim 1, wherein the length of the longest portion of the main body portion in the plan view is 1.5 times or less the length of the shorter one of the first edge and the second edge. The hair dyeing device according to claim 1, wherein a length of the longest portion of the main body portion in a plan view is 100 mm or less. A hair dyeing device according to claim 1, wherein a concave portion is formed on at least one surface of the main body portion, and a peripheral portion of the main body portion constitutes a wall portion surrounding the concave portion. The hair dyeing device according to claim 4, wherein the wall portion has a first portion along the first edge and a second portion along the second edge, and at least one of the first portion and the second portion The both end portions are increased in height in a bow shape toward the intermediate portion between the both end portions. The hair dyeing appliance according to any one of claims 1 to 5, wherein, in a plan view, the main body portion includes a third edge that connects one of the ends of the first edge and the second edge to each other at a farthest distance from each other , The third edge includes a convex curved portion that is convex toward the outer side of the main body portion in plan view. The hair dyeing appliance according to any one of claims 1 to 5, wherein, in a plan view, the main body portion is formed to include a fan shape connecting an arcuate third edge of one end of the first edge and one end of the second edge shape. The hair dyeing device of claim 1, wherein an angle formed by the first edge and the second edge is an acute angle. The hair dyeing device of claim 1, wherein a plurality of protrusions are formed on a surface of the grip portion. The hair dyeing device of claim 9, wherein at least one of the plurality of protrusions is disposed at a position along a bisector of an angle formed by the first edge and the second edge, the at least one protrusion being larger than the other Protrusion. The hair dyeing device according to claim 1, wherein the planar shape of the main body portion is an axisymmetric shape in which an angle bisector of the angle formed by the first edge and the second edge is an axis of symmetry.