Small mirror

Abstract

To provide a small mirror which is usable easily in a facing posture and in a look-in posture without largely changing a seat position or a seating posture.SOLUTION: A small mirror has: a support cylinder 1 which has a steep inclined plane Fα and a gradual inclined plane Fβ and is configured to be mountable on a table; and a mirror body 2 rotatably held with respect to the support cylinder 1 with an apex line of the steep inclined plane Fα and the gradual inclined plane Fβ as a center. The center of rotation is set to a position deviated from a radial line in a horizontal direction of a mirror surface of the mirror body 2. The mirror body 2 is configured to be usable in a first posture along the steep inclined plane Fα and in a second posture along the gradual inclined plane Fβ by rotating the support cylinder 1 at 180 degrees.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to a small mirror used by placing it on a desk or the like, which can be used without difficulty in both a facing posture and a peeping posture without significantly changing the sitting position or sitting posture.

Background Art

[0002] Various objects have been proposed as desktop mirrors for checking the face when necessary, and a configuration has also been proposed in which a rotation axis is provided and the mirror surface is rotatably supported.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

[0004] However, a configuration that can hold a first mirror surface posture that can be used by the user in a facing posture and a second mirror surface posture that can be used in a peeping posture by turning it over and using it is not known.

[0005] That is, in a normal configuration, when the mirror surface used by the user in a facing state is rotated in a distant direction with the rotation axis as a fulcrum, the user's face cannot be appropriately displayed on the mirror surface unless the user significantly changes the posture and peeks deeply.

Problems to be Solved by the Invention

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a small mirror that can be used comfortably in a facing-forward position or a peeping position without significantly changing the seating position or posture.

Means for Solving the Problems

[0007] To achieve the above object, a small mirror according to the present invention includes a support (1) configured to be placed on a tabletop and having a steep slope (Fα) inclined at a first acute angle (α) with respect to the vertical line during use and a gentle slope (Fβ) inclined at a second acute angle (β) with respect to the vertical line, and a mirror body (2) rotatably held with respect to the support (1) about a horizontal line forming the apex of the steep slope (Fα) and the gentle slope (Fβ). The rotation center is set at a position offset from the horizontal radius line of the mirror surface of the mirror body (2), and by rotating the support (1) 180 degrees in the horizontal plane, the mirror body (2) can be used in a first posture along the steep slope (Fα) and a second posture along the gentle slope (Fβ). At the same time, regardless of the 180-degree rotation, when the positional relationship between the support (1) and the user is commonly arranged on a tabletop, the horizontal separation distance between the intersection point of the first normal line from the center of the mirror of the mirror body (2) in the first posture to the user and the second normal line from the center of the mirror in the second posture to the user, and the support (1) is 50 to 300 mm It is characterized by that.

[0008] Hereinafter, the principle of the present invention will be described. FIG. 1 shows a state in which a small mirror divided into a support (support cylinder) 1 and a mirror body 2 is placed on a tabletop. Here, it shows the case where the user takes a facing-forward position (a) with respect to the tabletop mirror in the first posture with a mirror surface elevation angle of 90° - α, and the case where the user takes a forward-leaning peeping position (b) with respect to the tabletop mirror in the second posture with a mirror surface elevation angle of 90° - β.

[0009] As shown in the figure, in this tabletop mirror, the mirror body 2 is configured to be rotatable about the apex line of the support 1 having a height H. In the first posture of the mirror body shown in FIG. 1(a), the inclination angle of the normal line from the mirror center is α, and in the second posture, the inclination angle of the normal line from the mirror center is β.

[0010] FIG. 1(c) shows the relationship between the viewpoint position when the user with a seat height T' takes a facing-forward position (FIG. 1(a)), the viewpoint position when taking a peeping position with an inclination angle θ (FIG. 1(b)), and the mirror surface center.

[0011] Here, assuming the height difference from the chair to the viewpoint position is T (see Fig. 1(a)), when the user leans forward at an inclination angle θ, the user approaches the mirror horizontally by T*SIN(θ) and descends vertically by T - T*COSN(θ). Specifically, the numerical values for the cases of T = 700 mm and T = 800 mm are as follows.

[0012]

Table 1

[0013] On the other hand, when the desktop mirror is rotated from the state of Fig. 1(a) to Fig. 1(b), as will be described later with respect to Fig. 5, the position of the mirror center moves downward by ΔL*(COS(α)+COS(β)) ··· (Equation 1) and moves leftward by 3 / 5*L - ΔL*(SIN(α)+SIN(β)) ··· (Equation 2).

[0014] Here, ΔL is the distance between the rotation center (hinge position) of the mirror body and the mirror center, and L is the diameter of the support 1 (in the case of a support cylinder). In the following description, it is assumed that the horizontal width of the portion forming the steep inclined surface Fα in the support 1 is, for example, 1 / 5*L, and the horizontal width of the portion forming the gentle inclined surface Fβ is 4 / 5*L (see Fig. 2).

[0015] Under the above conditions, in order to be able to view the mirror center smoothly when a user at a distance W from the mirror center changes from the front-facing posture in Fig. 1(a) to the peeping posture in Fig. 1(b), the following relationship is required for the distance W. Equation 1

[0016] TIFF0007709305000002.tif12160 ··· (Equation 3)

[0017] When the steep inclination angle α = 20°, the gentle inclination angle β = 40°, L = 90 mm, and ΔL = 45 mm are substituted into the above-mentioned (Formula 3) as an example, the horizontal distance W between the mirror center and the seating position is calculated as shown in Table 2. And if one sits at the position of the horizontal distance W shown in Table 2, in principle, it becomes possible to view the mirrors with elevation angles of 90° - α and 90° - β without difficulty. Note that the horizontal distance W is different from the X value in the XY coordinate system, and there is a relationship between the horizontal value X in the XY coordinate system and the horizontal distance W as follows: W = X + L / 5 + ΔL * SIN(α) ··· (Formula 11) (see Fig. 2(a)).

[0018]

Table 2

[0019] Specifically checking the content of Table 2, for example, if a user with an eye height of 700 mm sits at a position 478 mm from the mirror center, from the state shown in Fig. 1(a) where the mirror with an elevation angle of 90° - α is seen, if a forward inclination posture of θ = 20° (see Fig. 1(b)) is taken, it becomes possible to view the center of the mirror with an elevation angle of 90° - β without difficulty.

[0020] In the present invention, the reason why the above effects can be achieved is that when the desktop mirror is rotationally moved from the state of Fig. 1(a) to the state of Fig. 1(b), the mirror center descends by ΔL * (COS(α) + COS(β)) ··· (Formula 1) downward and moves away from the left side by 3 / 5 * L - ΔL * (SIN(α) + SIN(β)) ··· (Formula 2).

[0021] Hereinafter, the mathematical formulas specifying the present invention including (Formula 1) to (Formula 3) will be described. Fig. 2 illustrates the state where the mirror surface has an elevation angle of 90° - α (Fig. 2(a)) and the state where the mirror surface has an elevation angle of 90° - β (Fig. 2(b)). Here, at the foremost surface of the support cylinder 1, with the vertex line of the support cylinder 1 as the origin position (0, 0), the normal lines (α line and β line) from the mirror center ● are illustrated with arrows.

[0022] Regarding (Equation 1) and (Equation 2), since they will be explained later based on Figure 5, first, the α-line and β-line shown in Figure 2 will be explained. In the illustrated XY coordinate system, since the Y-intercept of Figure 2(a) is L / 5*TAN(α)+ΔL / COS(α), the linear equation (α-line) for specifying the normal line is Equation 2

[0023] TIFF0007709305000004.tif568 ···(Equation 4).

[0024] On the other hand, since the Y-intercept of Figure 2(b) is L*4 / 5*TAN(β)-ΔL / COS(β), the linear equation (β-line) for specifying the normal line in Figure 2(b) is Equation 3

[0025] TIFF0007709305000005.tif673 ···(Equation 5).

[0026] And the X-coordinate value of the intersection point of the two normal lines is obtained from (Equation 4)=(Equation 5), so Equation 4

[0027] TIFF0007709305000006.tif13102 ···(Equation 6).

[0028] Figure 3(a) shows, with a separation distance ΔL = 45 mm between the rotation center (hinge position) of the mirror body and the mirror center, the normal line (α-line) with an angle α = 20° shown as a solid line and the normal line (β-line) with an angle β = 40° shown as a dashed line.

[0029] As shown in the figure, the two normal lines intersect at around X = 110 mm. Therefore, when the user sits at a position farther than X = 110 mm and in the state of Figure 1(a) where the viewpoint is on the solid line, and then the user takes an appropriate forward-leaning posture, the viewpoint will reach the dashed line, and it will be possible to see the mirror center without moving the seating position (see Figure 1(b)).

[0030] Figs. 3(b) and 3(c) show the intersection positions when the separation distance ΔL between the hinge and the mirror center is changed. It is confirmed that as the separation distance ΔL increases, the intersection position moves away accordingly (see Fig. 3(b)), and as the separation distance ΔL decreases, the intersection position approaches (Fig. 3(c)).

[0031] Here, considering the relationship between the separation distance ΔL between the hinge, which is the rotation center of the mirror body 2, and the mirror center, and the center of gravity of the mirror body, the greater the separation distance ΔL, the higher the center of gravity position of the mirror body 2 becomes above the rotation center (0, 0), and accordingly, the first posture of the mirror body 2 shown in Figs. 1(a) and 2(a) becomes unstable.

[0032] Considering this point, it is preferable to provide a locking mechanism for temporarily holding the mirror posture in Fig. 2(a) at the hinge portion. In addition to this locking mechanism, it is suitable to arrange a weight WT for balancing the upper weight and the lower weight from the rotation center in the mirror body at the lower side of the mirror body (see Fig. 2).

[0033] In any case, the greater the separation distance ΔL, the worse the balance of the mirror body 2 becomes. Therefore, the separation distance ΔL between the hinge and the mirror center should be made as small as possible. However, in the state of Fig. 3(c), since the intersection of the two normal lines approaches about 60 mm, next, the relationship between the intersection position and the tilt angles α, β will be examined.

[0034] As shown in Fig. 4(a), for example, when α = 25° and β = 35°, and the difference in tilt angles β - α = 10° is reduced, the intersection position moves farther away. Also, as shown in Fig. 4(b), even with the same angle difference of 10°, when the tilt angles are decreased to α = 20° and β = 30°, it is confirmed that the intersection position moves even farther away.

[0035] As described above, if the separation distance ΔL is reduced, the intersection position approaches (see Fig. 3(c)). It is confirmed that when the difference between the inclination angles α and β is reduced, the intersection position moves away. Fig. 4(c) takes these into consideration. When α = 15°, β = 30°, and ΔL = 36 mm are set, the intersection position becomes about 130 mm, which is similar to the case of Fig. 3(a). However, compared with Fig. 3(a), since the normal lines are lower by the amount that α and β are smaller, in the state of Fig. 4(c), correspondingly, it is necessary to set the height H of the support 1 higher.

[0036] Table 3 shows the X coordinate values of the intersection points when the steep inclination angle α and the gentle inclination angle β are changed and the value of ΔL is changed from the standard value of 45 mm by 60% to 120%.

[0037]

Table 3

[0038] Taking the above points into comprehensive consideration, it is necessary to determine the specific dimensions including the height H of the support 1. In any case, for the following reasons, the intersection of the two normal lines is preferably 50 to 300 mm.

[0039] First, in order to maintain the sitting position and for the user to shift from the facing-forward posture to the peering-in posture, it is necessary to sit at a position farther than the intersection position. If the intersection position exceeds 300 mm, it is inappropriate because it is too far from the desktop mirror and there is a possibility that the desktop mirror cannot be rotated. On the other hand, when the intersection of the two normal lines is less than 50 mm, it is inappropriate because the user gets too close and there is a risk that the entire face cannot be confirmed in the mirror surface.

[0040] Subsequently, the calculation procedures of (Equation 1) and (Equation 2) will be explained. First, based on Fig. 5, the relationship between the mirror center and the origin (0, 0) of the XY coordinates is examined. As shown in Fig. 5(a), in the mirror with the elevation angle of the mirror surface being 90° - α, the mirror center retreats by L / 5 + ΔL*SIN(α) from the origin (0, 0) and rises by ΔL*COS(α) from the origin (0, 0).

[0041] On the other hand, as shown in Fig. 5(b), for a mirror with a mirror surface elevation angle of 90° - β, the mirror center retreats by 4*L / 5 - ΔL*SIN(β) from the origin (0, 0), and descends by ΔL*COS(β) from the origin (0, 0).

[0042] Therefore, when moving the mirror body 1 from the first posture of the mirror surface with an elevation angle of 90° - α (see Fig. 5(a)) to the second posture of the mirror surface with an elevation angle of 90° - β (see Fig. 5(b)), the mirror center will descend by ΔL*COS(α) + ΔL*COS(β) = ΔL*(COS(α) + COS(β)) ··· (Equation 1), and the validity of the above-mentioned (Equation 1) is confirmed.

[0043] Also, when moving the mirror body 1 from the first posture of the mirror surface with an elevation angle of 90° - α (see Fig. 5(a)) to the second posture of the mirror surface with an elevation angle of 90° - β (see Fig. 5(b)), the mirror center will recede by 4*L / 5 - ΔL*SIN(β) - (L / 5 + ΔL*SIN(α)) = 3 / 5*L - ΔL*(SIN(α) + SIN(β)) ··· (Equation 2), and from this relationship, the validity of the above-mentioned (Equation 2) is confirmed.

[0044] Based on the above, returning to Fig. 1(c) to continue the explanation. First, considering a right triangle with an angle α (the user is in a facing posture), the height difference between the mirror center and the viewpoint is W*TAN(α).

[0045] On the other hand, in a state where a right triangle with an angle β is formed, the horizontal distance between the mirror center and the viewpoint is W - T*SIN(θ) + 3 / 5*L - ΔL*(SIN(α) + SIN(β)) ··· (Equation 7), and the vertical distance between the mirror center and the viewpoint is W*TAN(α) - (T - T*COS(θ)) + ΔL*(COS(α) + COS(β)) ··· (Equation 8).

[0046] And since the relationship of TAN(β) holds between the horizontal distance in (Equation 7) and the vertical distance in (Equation 8), the following (Equation 9) holds. Equation 5

[0047] TIFF0007709305000008.tif12105 ···(Formula 9)

[0048] And, by obtaining the distance W between the mirror center and the user's seating position based on (Formula 9), the above-mentioned (Formula 3) is derived. That is, Formula 6

[0049] TIFF0007709305000009.tif13168 ···(Formula 3) is derived, and the numerical values in Table 2 shown again are calculated.

[0050]

Table 2

[0051] From the above relationships, for example, when the steep inclination angle α = 20°, the gentle inclination angle β = 40°, L = 90 mm, and ΔL = 45 mm, a user (with an eye height of about 700 mm) sitting at a position 250 to 560 mm away from the mirror center and facing the mirror can see the center of the mirror in the state of Fig. 1(b) just by taking a forward inclination posture of about 5° to 30°. Note that the above-mentioned horizontal distance W is different from the X value in the XY coordinate system. There is a relationship of W = X + L / 5 + ΔL * SIN(α)···(Formula 11) as described above.

[0052] However, in the separation distance W calculated as shown in the above figure, the height of the chair on which the user sits is not common.

[0053] First, the height difference between the mirror center in the facing posture and the chair is T - W * TAN(α). On the other hand, since there is a deviation of ΔL * COS(α) from the mirror center to the origin of the XY coordinates (Fig. 5(a)), ultimately, the height difference ΔT between the origin position of the XY coordinates and the chair is ΔT = T - W * TAN(α) - ΔL * COS(α)···(Formula 10). Table 4 below shows the values of the height difference ΔT between the chair and the origin corresponding to the forward inclination angle θ, and it is confirmed that it changes corresponding to the separation distance W.

[0054]

Table 4

[0055] Based on the above points, a more general explanation will be given based on the XY coordinate system shown in FIGS. 2 and 4. For example, assume that a user with an eye height T = 700 mm is sitting on a chair with a height difference ΔT = 450 mm between the hinge position (Y coordinate value = 0) and the top of the chair and looking at a mirror (see FIG. 5(a)).

[0056] In this case, from (Equation 4), 700 - 450 = X * TAN(α) + L / 5 * TAN(α) + ΔL / COS(α) holds, X = (250 - L / 5 * TAN(α) - ΔL / COS(α)) / TAN(α) Thus, the X coordinate of the seating position is specified. Incidentally, in this example, the X coordinate of the seating position is 537.3 mm. When this X coordinate value is converted to the distance W from the center of the mirror, from (Equation 11) shown in FIG. 2, W = 537.3 + L / 5 + ΔL * SIN(α), and W ≒ 570.7 mm.

[0057] Next, when the circular locus associated with the forward leaning posture of the user is specified as an arc centered at (X0, Y0), from (X - X0)^2 + (Y - Y0)^2 = 700^2, Y = SQRT(700^2 - (X - X0)^2) + Y0. Note that Y0 = -ΔT.

[0058] Here, since Xo = 537.3 and Y0 = -450, the Y coordinate value of the arc locus is, Y = SQRT(700^2 - (X - 537.3)^2) - 450.

[0059] FIG. 6 shows an α line specifying the normal line at the elevation angle α, a β line specifying the normal line at the elevation angle β, and the circular locus of a user with an eye height T = 700 mm leaning forward. As shown in the figure, it is confirmed that the arc and the β line intersect at a position where X ≒ 177 mm.

[0060] Note that the intersection point of 177 mm between the arc and the β line means an inclination angle of θ ≒ 31° from SIN(θ) * 700 = 537.3 - 177 = 360.3. As described above, there is a relationship of W = X + L / 5 + ΔL * SIN(α) ··· (Equation 11) between the horizontal distance W and the X value. As described above, X = 537.3 mm means W = 570.7 mm.

[0061] As described above, for the case where a user with an eye height T = 700 mm sits on a chair with a height difference ΔT = 450 mm between the hinge position and the chair apex, the arc trajectory has been specified. Of course, the arc trajectory drawn by the user changes corresponding to the height of the chair and the eye height T. However, by changing the seating position corresponding to the user's eye height and the height of the chair, a similar peeping posture can be taken. Fig. 7 shows the case where a user with an eye height T = 670 mm sits on the same chair. The intersection point of the arc and the β line is about 200 mm.

[0062] As described above, actually, the hip position, which is the rotation center of the peeping angle θ, needs to move up and down appropriately while maintaining the horizontal distance W. Therefore, when the height H (see Fig. 1) to the hinge of the small mirror is fixed, it is necessary to appropriately set the height of the chair corresponding to the seating position of one's preference. However, since humans can stretch their backs or round their backs as needed and can tolerate some deviation in the center of their face reflected in the mirror surface, actually, no special adjustment is required.

Advantages of the Invention

[0063] As described above, according to the present invention, it is possible to realize a small mirror that can be used without difficulty in both the facing posture and the peeping posture.

Brief Description of the Drawings

[0064]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0065] Hereinafter, the present invention will be described in detail based on the embodiments. FIG. 8 is a drawing explaining a small mirror in which the support cylinder 1 and the rotatable mirror body 2 are connected via a hinge 3. FIG. 8(a) shows the small mirror arranged in the first position when the user takes a facing forward posture, and FIG. 8(b) shows the second position where the rotatable mirror body 2 in the first position is flipped up and rotated by 120°.

[0066] Further, FIG. 8(c) shows the state where the rotatable mirror body 2 in the second position is rotated 180° on the horizontal plane as shown in FIG. 8(b). As described above, the vertical line in contact with the foremost surface of the support cylinder 1 is the Y-axis, and the horizontal line extending horizontally from the center of the hinge 3 is the X-axis. And in FIG. 8, the intersection of the X-axis and the Y-axis is shown as the origin (0,0).

[0067] As shown in Fig. 8(d), this small mirror is composed of a hollow cylindrical support cylinder 1 with a diameter L of about 88 mm and a disc-shaped rotating mirror body 2 with a diameter Φ of about 203 mm, which are connected via a torque hinge 3 that holds an arbitrary rotation angle.

[0068] The support cylinder 1 is a plastic molded product, on which a gentle slope surface Fβ with an inclination angle β = 40° and a steep slope surface Fα with an inclination angle α = 20° are formed. As shown in Fig. 8(a) and Fig. 8(c), the cylinder height reaching the gentle slope surface Fβ is set to about 67 mm, the cylinder height reaching the steep slope surface Fα is set to about 98 mm, and the height up to the hinge 3 is set to about 150 mm. Note that the diameter L = 88 mm is internally divided in about a 4:1 ratio, forming the gentle slope surface Fβ and the steep slope surface Fα.

[0069] Also, the positional relationship between the rotating mirror body 2 and the hinge 3 is as shown in Fig. 9(c). The diameter Φ (= 203 mm) is divided by the hinge 3 into a short-distance part L1 = 64 mm and a long-distance part L2 = 139 mm. Therefore, the distance ΔL between the hinge 3 and the mirror center is ΔL = 37.5 mm in this embodiment.

[0070] Based on the above numerical values, the straight lines (α-line and β-line) that specify the normal line from the mirror center in the first posture (Fig. 2(a)) and the second posture (Fig. 2(c)) are specified (see Equation 4 and Equation 5). And the distance from the origin position (0, 0) of the intersection point of the α-line and the β-line is calculated to be 76.17 mm based on (Equation 6).

[0071] Also, assuming a user with a height difference T = 700 mm from the seat to the viewpoint takes a forward-leaning posture (Fig. 1(b)) with a 20° inclination from the facing posture (Fig. 1(a)), the distance W from the mirror center in the first posture to the seating position is 440.6 mm according to (Equation 3).

[0072] Here, since the deviation between the mirror center in the first posture and the origin is L / 5 + ΔL*Sin(α) ··· (Equation 11) (see Fig. 2), the separation distance from the origin position to the seating position is 440.6 - (L / 5 + ΔL*Sin(α)) = 410.2 mm.

[0073] And the height difference ΔT between the origin position and the chair is, from Equation (10), ΔT = T - W * TAN(α) - ΔL * COS(α) = 700 - 440.6 * TAN(α) - 37.5 * COS(α) = 504.4 mm.

[0074] That is, a user with T = 700 mm, after sitting on a chair that realizes a height difference ΔT = 504 mm shown in FIG. 1 at a position 410 mm from the origin position and viewing the mirror surface in the first posture (FIG. 8(a)), if tilted forward by 20°, the mirror surface in the second posture (FIG. 8(c)) can be viewed without difficulty.

[0075] Next, FIG. 9 is a drawing showing the configuration of the rotating mirror body 2. As shown in FIG. 9(a), the rotating mirror body 2 of the embodiment is composed of a disk-shaped base member 20 that receives the hinge 3 and the intermediate member 21, a disk-shaped intermediate member 21, and a mirror body 22 that is a circular rear mirror with a slightly smaller diameter than the base member 20, which are laminated.

[0076] Here, the intermediate member 21 may be an integrally formed plastic disk, or an appropriate weight WT may be disposed in the lower part. That is, in the rotating mirror body 2, in order to make the weights on the upper and lower sides divided by the horizontal line HR passing through the center of the hinge 3 coincide, it is preferable to embed the weight WT in the lower side.

[0077] As shown in FIG. 9(a), in the base member 20, a receiving hole HO for receiving the hinge 3 is formed horizontally with the width of the hinge 3. Further, in the base member 20, a first receiving hole RV1 having the same dimensions as the intermediate member 21 and a second receiving hole RV2 having the same dimensions as the mirror body 22 are formed.

[0078] Based on the above configuration, the intermediate member 21 is fixed to the base member 20 by adhesion or the like, and then the mirror body 22 is fixed to the base member 20 and the intermediate member 21 by adhesion or the like.

[0079] As shown in FIG. 10, the rotating piece 32 on one side of the hinge 3 is received in the receiving hole HO of the base member 20 and fixed by adhesion or the like. Further, the rotating piece 31 on the other side of the hinge 3 is received in the mounting hole IN formed in the upper part of the support cylinder 1 and fixed by adhesion or the like.

[0080] The hinge 3 mounted as described above is a torque hinge that requires an appropriate rotational torque during rotation. Therefore, the rotating mirror body 2 can be stationary not only in the first posture and the second posture but also in an arbitrary rotating state. Accordingly, it can be used at an inclination angle preferred by the user. Note that the intermediate member 21 is not essential, and the base member 20 may be integrally configured including the portion of the intermediate member 21. In this case, the weight WT is insert-molded into the base member 20.

[0081] As described above, the embodiments have been specifically described, but the specific description content does not limit the present invention in any way. For example, the hinge 3 does not necessarily have to be a metal torque hinge, and may be a molded product using a hard plastic with good slidability, such as polyacetal (POM) or polyamide (PA).

[0082] FIG. 11 is a drawing for explaining the plastic hinge 3. This hinge 3 includes a first member HN1 insert-molded during the molding of the support cylinder 1, a second member HN2 insert-molded during the molding of the base member 20, and a pin member PN that integrates the first member HN1 and the second member HN2.

[0083] As shown in FIG. 12(a), the second member HN2 is an integrally molded product having a flat plate PT2 and a cylindrical body RG2 along the plate surface of the flat plate PT2. Two ridges PR are formed to extend in the axial direction on the cylindrical body RG2.

[0084] Then, while the flat plate PT2 is embedded in the base member 20, the base member 20 and the second member HN2 are integrated so that the ridges PR are exposed at the contact portion between the cylindrical body RG2 and the base member 20.

[0085] On the one hand, the first member HN1 is an integrally molded product having a flat plate PT1 and a cylindrical body RG1 continuous with the upper end surface of the flat plate PT1. The support cylinder 1 and the first member HN1 are integrated by embedding the flat plate PT1 in the top of the support cylinder 1.

[0086] Here, although the cylindrical bodies RG1 are separated and aligned in two places (see Fig. 11), the outer diameter and inner diameter of each cylindrical body RG1 are the same as the outer diameter and inner diameter of the cylindrical body RG2. The inner diameter dimensions of the cylindrical bodies RG1 and RG2 are formed to be slightly larger than the outer diameter dimension of the pin member PN. However, it is not particularly limited, and the torque hinge effect can also be exerted by making the inner diameter dimensions of the cylindrical bodies RG1 and RG2 substantially the same as the outer diameter dimension of the pin member PN.

[0087] Next, when checking the relationship between the support cylinder 1 and the first member HN1, as shown in Fig. 12(a), the first member HN1 is insert-molded so that the cylindrical body RG1 is exposed from the support cylinder 1. At the uppermost part of the trapezoidal cross-section of the support cylinder 1, two receiving grooves GV for receiving the ridges PR of the cylindrical body RG2 are formed.

[0088] The rotating mirror body 2 integrated with the second member HN2 and the support cylinder 1 integrated with the first member HN1 are positioned by arranging the cylindrical body RG2 between the two aligned cylindrical bodies RG1. In this positioned state, the pin member PN is driven into the cylindrical bodies RG1 and RG2, so that the rotating mirror body 2 and the support cylinder 1 are integrated.

[0089] In this integrated state, when the rotating mirror body 2 is appropriately rotated, the first posture and the second posture are realized at the rotation limit positions. Fig. 12(c) shows the first posture of the mirror body 22. The right ridge PR is immersed in the right receiving groove GV, so that the ridge PR is in a temporary locked state and the first posture is stabilized.

[0090] On the other hand, Fig. 12(d) shows the second posture of the mirror body 22. When the convex strip PR on the left side is immersed in the receiving groove GV on the left side, the convex strip PR is in a temporary locked state and the second posture is stabilized.

[0091] As described above, the small mirror having the rotating mirror body 2 with a diameter Φ of about 203 mm has been explained. However, it is also preferable to appropriately reduce the overall shape. For example, a small mirror in which the rotating mirror body 2 is significantly reduced in size to about Φ = 93 mm (L1 = 73, L2 = 20), the diameter L of the support cylinder 1 is 48 mm, and the height H to the hinge is about 100 mm is also suitable.

[0092] In this small mirror, since the support cylinder 1 can be gripped when necessary, the size of the rotating mirror body 2 does not pose a problem. That is, when the rotating mirror body 2 is in the first posture, by placing the viewpoint on the α line, it can be used as a tabletop mirror. On the other hand, in the state of holding the support cylinder 1, the rotating mirror body 2 in the first or second posture can be looked into, which is suitable for touch-up makeup and checking key parts of the face.

[0093] In the case of this small mirror, when α = 20°, β = 40°, and ΔL = 26.5 mm, the intersection point of the α line and the β line is X = 71.7 mm from Equation (6). Also, the α line is Y = X * TAN(α) + L / 5 * TAN(α) + 26.5 / COS(α) from Equation (4).

Explanation of symbols

[0094] α First acute angle Fα Steep slope β Second acute angle Fβ Gentle slope 1 Support (support cylinder) 2 Mirror body (rotating mirror body)

Claims

1. A support (1) having a steep slope (Fα) inclined at a first acute angle (α) with respect to the vertical line during use and a gentle slope (Fβ) inclined at a second acute angle (β) with respect to the vertical line, and configured to be placed on a tabletop, A small mirror having a mirror body (2) rotatably held with respect to the support (1) about a horizontal line forming the apex of the steep slope (Fα) and the gentle slope (Fβ), The rotation center is set at a position offset from the horizontal radial line of the mirror surface of the mirror body (2), By rotating the support (1) 180 degrees in a horizontal plane, the mirror body (2) is configured to be usable in a first posture along the steep slope (Fα) and a second posture along the gentle slope (Fβ), Regardless of the 180-degree rotation, when the positional relationship between the support (1) and the user is commonly arranged on the tabletop, The intersection of a first normal line from the center of the mirror of the mirror body (2) toward the user in the first posture and a second normal line from the center of the mirror toward the user in the second posture, A small mirror, characterized in that the horizontal separation distance from the support (1) is 50 to 300 mm.

2. The small mirror according to claim 1, wherein the support (1) and the mirror body (2) are connected via a hinge mechanism that can be stopped at an arbitrary angle.

3. The small mirror according to claim 1, wherein a first member fixed to the support (1) and a second member fixed to the mirror body (2) are rotatably connected by a pin member passing through the first member and the second member.

4. The small mirror according to claim 3, wherein a locking mechanism is provided for holding the mirror body (2) in the first posture and the second posture.

5. In the mirror body (2), on one side with a smaller area partitioned by the horizontal line, A weight corresponding to the weight difference from the other side with a larger area is embedded. The small mirror according to claim 2 or 3.

6. The small mirror according to any one of claims 1 to 5, wherein the support is formed in a cylindrical shape with a diameter of 60 mm or less that can be easily carried.

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