Mirror unit

Abstract

To provide a good-looking mirror unit.SOLUTION: A mirror unit comprising: a back plate; a first adhesive portion bonded to a surface of the back plate; and a mirror portion facing the back plate and bonded to the first adhesive portion, wherein the mirror unit further comprises a fall prevention portion provided between the back plate and the mirror portion, the fall prevention portion supporting the mirror portion when the mirror portion moves downward with respect to the back plate.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Aspects of the present invention generally relate to mirror units. [Background technology]

[0002] A mirror unit in which a mirror portion is fixed by a frame is known (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-145722 Summary of the Invention [Problem to be solved by the invention]

[0004] In the mirror unit of Patent Document 1, when the mirror portion is viewed from the front, part of the mirror portion is covered by the frame, which may impair the design.

[0005] The present invention has been made based on the recognition of such problems, and has an object to provide a mirror unit that looks good. [Means for solving the problem]

[0006] The first invention is a mirror unit comprising a back plate portion, a first adhesive portion adhered to the surface of the back plate portion, and a mirror portion adhered to the first adhesive portion facing the back plate portion, characterized in that the mirror unit has a fall prevention portion provided between the back plate portion and the mirror portion that supports the mirror portion when the mirror portion moves downward relative to the back plate portion.

[0007] According to this mirror unit, the fall prevention part provided between the back plate and the mirror part prevents the mirror part from falling off the back plate. Therefore, in a mirror unit that does not have a holding part such as a frame that holds the back plate and the mirror part on the outer periphery of the mirror part, it is possible to provide a mirror unit that can prevent the mirror part from falling off and does not spoil the appearance.

[0008] A second invention is a mirror unit according to the first invention, characterized in that a part of the fall prevention portion is adhered to the mirror portion by a second adhesive portion.

[0009] With this mirror unit, by fixing the fall prevention part to the mirror part by adhesive, machining such as drilling holes to attach the fall prevention part to the mirror part is not required, and deterioration of the design of the mirror unit can be prevented.

[0010] The third invention is a mirror unit characterized in that, in the second invention, the fall prevention portion has an engaging portion provided on the back surface of the mirror portion and an engaged portion provided on the surface of the back plate portion that engages with the engaging portion when the mirror portion moves downward relative to the back plate portion.

[0011] With this mirror unit, even if the adhesive between the mirror portion and the back plate portion comes loose, the engaging portion engages with the engaged portion, preventing the mirror portion from moving downward and forward.

[0012] The fourth invention is a mirror unit in which, in the third invention, the surface of the back plate portion has an inner portion and a frame portion that protrudes forward from the inner portion and surrounds the inner portion, and the fall prevention portion is characterized in that when the mirror portion moves downward relative to the back plate portion, the engaging portion engages with the engaged portion inside the frame portion.

[0013] With this mirror unit, the thickness of the engaging portion and the engaged portion can be absorbed inside the frame portion, and when the mirror unit is viewed from the side, the gap that occurs between the mirror portion and the back plate portion can be eliminated.

[0014] A fifth invention is the third invention, wherein the engaging portion has a first portion adhered to the second adhesive portion, a second portion extending from the first portion toward the back plate portion, and a third portion extending downward from the second portion, and in a cross-sectional view, a lower end of the first portion is defined as point A1, an upper end of the first portion is defined as point B1, and a point C1 is located on the second portion or the third portion, is positioned above point A1, has a maximum dimension with respect to point A1, and is closest to the back plate portion, and a line connecting point A1 and point B1 is defined as is the dimension h1 of the line segment connecting point A1 and point C1, L1 is the dimension of the line segment connecting point A1 and point C1, α1 is the angle formed by line segments A1B1 and A1C1, t1 is the thickness dimension of the second adhesive portion, K1 is the tolerance coefficient of the second adhesive portion, D1 is the dimension between the mirror portion and the back plate portion, and d1 is the dimension from the back surface of the mirror portion to the rear end of the engagement portion, when dimension L1 ≧ dimension d1, the following formulas (1) and (2) are satisfied, and when dimension L1 < dimension d1, the following formula (3) is satisfied. d1≦D1≦L1sin(α1+β1)…(1) β1=arcsin(K1×t1 / h1)…(2) D1=d1…(3)

[0015] With this mirror unit, by suppressing the movement of the engaging portion, the force acting in the horizontal direction of the second adhesive portion, which acts in the vertical direction and the horizontal direction, is suppressed, and therefore, by suppressing the resultant force acting in the engaging portion, it is possible to reduce the likelihood of the engaging portion coming off.

[0016] The sixth invention is related to the third invention, wherein the engaged portion has a first portion adhered to the back plate portion by a third adhesive portion, a second portion extending from the first portion toward the mirror portion, and a third portion extending upward from the second portion, and in a cross-sectional view, a lower end of the first portion is designated as point A2, an upper end of the first portion is designated as point B2, and a third portion is located on the second portion or the third portion, and is located above point A2, has a maximum dimension with respect to point A2, and is closest to the mirror portion. This mirror unit is characterized by satisfying the following mathematical expressions (4) and (5), when the closest point is defined as point C2, the dimension h2 of the line segment connecting point A2 and point B2, the dimension L2 of the line segment connecting point A2 and point C2, the angle α2 formed by line segments A2B2 and A2C2, the thickness dimension t2 of the third adhesive portion, the tolerance coefficient K2 of the third adhesive portion, the dimension D2 between the mirror portion and the back plate portion, and the dimension d2 from the back plate portion to the front end of the engaged portion. d2≦D2≦L2sin(α2+β2)…(4) β2=arcsin(K2×t2 / h2)…(5)

[0017] With this mirror unit, by suppressing the movement of the engaged part, the horizontal force acting on the third adhesive part is suppressed, and by suppressing the resultant force acting on the engaged part, it is possible to reduce the likelihood of the engaged part coming off.

[0018] A seventh invention is a mirror unit according to the first invention, characterized in that the fall prevention portion is provided above 50% of the length of the mirror portion in the height direction.

[0019] With this mirror unit, even if the mirror portion peels off from the back plate portion, the engagement point between the engaging portion and the engaged portion can be controlled on the upper side of the mirror portion and the back plate portion, so the amount of displacement in the rotational direction when the mirror portion attempts to rotate forward can be reduced, effectively preventing the mirror portion from falling forward. [Effects of the Invention]

[0020] According to an aspect of the present invention, a mirror unit with good appearance is provided. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a front view showing a cabinet equipped with a mirror unit according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing the cabinet. [Figure 3] FIG. 3 is an enlarged cross-sectional perspective view of part B in FIG. 2. [Figure 4] 2 is a cross-sectional view of the cabinet in FIG. 1 as viewed from the direction of arrow AA. [Figure 5] 10 is a cross-sectional view showing a case where the mirror portion is peeled off from the back plate portion. FIG. [Figure 6] 4 is an explanatory diagram showing the dimensional relationship between the mirror portion, the back plate portion, the second adhesive portion, and the engagement portion. FIG. [Figure 7] 10 is an explanatory diagram illustrating a case where the engaging portion is peeled off from the mirror portion. FIG. [Figure 8] FIG. 10 is an exploded perspective view showing a cabinet equipped with a mirror unit according to a second embodiment. [Figure 9] FIG. 4 is an enlarged cross-sectional view showing a fall prevention portion. [Figure 10] FIG. 11 is an exploded perspective view showing a cabinet equipped with a mirror unit according to a third embodiment. [Figure 11] FIG. 4 is an enlarged cross-sectional view showing a fall prevention portion. [Figure 12] FIG. 10 is a front view showing a cabinet equipped with a mirror unit according to a fourth embodiment. [Figure 13] 13 is a cross-sectional view of the cabinet in FIG. 12 as viewed from the direction of arrow CC. [Figure 14] FIG. 10 is a front view showing a cabinet equipped with a mirror unit according to a fifth embodiment. [Figure 15] 15 is a cross-sectional view of the cabinet in FIG. 14 as viewed from the direction of the arrow DD. [Figure 16] FIG. 13 is an exploded perspective view showing a cabinet equipped with a mirror unit according to a sixth embodiment. [Figure 17]10 is an enlarged cross-sectional view showing the fall prevention portion and the lower end of the cabinet. FIG. [Figure 18] 10 is an explanatory diagram showing the dimensional relationship between the mirror portion, the back plate portion, the third adhesive portion, and the engaged portion. FIG. [Figure 19] 10 is an explanatory diagram illustrating a case where the engaged portion is peeled off from the back plate portion. FIG. [Figure 20] 13 is an explanatory view similar to FIG. 6, showing a fall restraining section according to a seventh embodiment. [Figure 21] 8 is an explanatory view similar to FIG. 7, illustrating a state in which the engaging portion is peeled off from the mirror portion. [Figure 22] 13 is an explanatory view similar to FIG. 6, showing a fall restraining section according to an eighth embodiment. [Figure 23] 8 is an explanatory view similar to FIG. 7, illustrating a state in which the engaging portion is peeled off from the mirror portion. [Figure 24] 13 is an explanatory view similar to FIG. 6, showing a fall restraining section according to a ninth embodiment. [Figure 25] 8 is an explanatory view similar to FIG. 7, illustrating a state in which the engaging portion is peeled off from the mirror portion. [Figure 26] 19 is an explanatory view similar to FIG. 6, showing a fall restraining section according to a tenth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, similar components are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate. For ease of explanation, the scale of each component is changed in each drawing. For example, the thickness dimension t1 of the second adhesive portion 63 and the thickness dimension t2 of the third adhesive portion 73 (described later) are formed thinner than the thicknesses shown in the drawings.

[0023] 1 to 7 show a first embodiment of the present invention. FIG. 1 is a front view showing a cabinet equipped with a mirror unit according to the first embodiment. FIG. 2 is an exploded perspective view showing the cabinet. FIG. 3 is an enlarged perspective cross-sectional view of part B in FIG. FIG. 4 is a cross-sectional view of the cabinet in FIG. 1 as viewed from the direction of arrow AA.

[0024] As shown in FIGS. 1 and 2, the cabinet 10 includes a shelf portion 20 and a mirror unit 30. The cabinet 10 is installed in a washroom space such as a dressing room or a bathroom. The cabinet 10 may also be installed in a kitchen. In the embodiment, the direction in which a user facing the cabinet 10 is positioned is referred to as "front," and the opposite side is referred to as "rear." Furthermore, "up," "down," "left," and "right" are described as directions seen from the user facing the cabinet 10.

[0025] The shelf portion 20 is formed in a box shape with an opening at the front. The shelf portion 20 has an internal storage space S1 in which items such as toiletries and a hairdryer can be stored. The storage space S1 is provided with a plate portion 21 in which items can be stored, for example. As shown in Figures 2 and 4, the shelf portion 20 has multiple hinges 23. One end of the hinges 23 is fixed to the shelf portion 20, and the other end is fixed to a back plate portion 40, which will be described later. The mirror unit 30 can be opened and closed relative to the shelf portion 20 by the hinges 23.

[0026] The mirror unit 30 forms the front portion of the cabinet 10. In this example, the cabinet 10 has one mirror unit 30. The number of mirror units 30 provided in the cabinet 10 is not limited to one, but may be two or more. The mirror unit 30 is a hinged door that can be opened and closed relative to the shelf portion 20. When closed, the mirror unit 30 covers the front of the storage space S1 of the shelf portion 20, and when open, it opens up the storage space S1. The mirror unit 30 has a back panel portion 40, a mirror portion 50, and a fall prevention portion 60.

[0027] The back plate 40 is attached to the shelf 20 via hinges 23. The back plate 40 is formed to correspond to the external shape of the shelf 20 and covers the storage space S1 of the shelf 20. The surface 41 of the back plate 40 has an inner portion 41a and a frame portion 41b that protrudes forward from the inner portion 41a and surrounds the periphery of the inner portion 41a. In other words, the inner portion 41a is recessed rearward from the frame portion 41b. In other words, the surface 41 of the back plate 40 is formed in a stepped shape in the front-to-rear direction by the inner portion 41a and the frame portion 41b. A space S2 is formed between the inner portion 41a and the mirror portion 50. The back surface 42 of the back plate 40 is flat.

[0028] The frame 41b has an upper portion 41b1 located above the inner portion 41a, a lower portion 41b2 located below the inner portion 41a, a left portion 41b3 located to the left of the inner portion 41a, and a right portion 41b4 located to the right of the inner portion 41a. The upper portion 41b1 and the lower portion 41b2 extend in the left-right direction corresponding to the width dimension (left-right dimension) of the shelf 20. The left portion 41b3 and the right portion 41b4 extend in the up-down direction corresponding to the height dimension (up-down dimension) of the shelf 20.

[0029] In addition, the surface 41 of the back plate portion 40 has a first connecting portion 41c connecting the inner portion 41a and the upper portion 41b1, a second connecting portion 41d connecting the inner portion 41a and the lower portion 41b2, a third connecting portion 41e connecting the inner portion 41a and the left portion 41b3, and a fourth connecting portion 41f connecting the inner portion 41a and the right portion 41b4.

[0030] The third connecting portion 41e and the fourth connecting portion 41f each have a hole 43 drilled in the left-right direction (only the hole 43 of the third connecting portion 41e is shown in FIG. 3). This hole 43 is for attaching an engaged portion 65, which will be described later. The hole 43 is provided on the upper end side of the third connecting portion 41e and the fourth connecting portion 41f (above the center of the height of the third connecting portion 41e and the fourth connecting portion 41f). The hole 43 is provided, for example, above a plane heater 52, which will be described later.

[0031] The first adhesive portion 47 is adhered to the surface 41 of the back plate portion 40. Specifically, the first adhesive portion 47 is adhered to the left portion 41b3 and the right portion 41b4 of the frame portion 41b so as to extend in the vertical direction. The first adhesive portion 47 adheres and fixes the mirror portion 50 to the back plate portion 40. The first adhesive portion 47 is, for example, a cushioned double-sided tape. This allows the first adhesive portion 47 to absorb external forces applied to the mirror portion 50. The first adhesive portion 47 may be an adhesive or the like. The first adhesive portion 47 may be provided on the upper portion 41b1 or the lower portion 41b2 of the frame portion 41b.

[0032] A sealant (not shown) may be provided between frame portion 41b and mirror portion 50. This sealant is provided, for example, on the outer side of first adhesive portion 47 and around the entire periphery of frame portion 41b. The sealant prevents water, detergent, soap, dirt, and the like from penetrating between back panel 40 and mirror portion 50. This prevents water, detergent, soap, dirt, and the like from adhering to first adhesive portion 47 and reducing the adhesive strength of first adhesive portion 47.

[0033] The mirror section 50 is bonded to the first adhesive portion 47 facing the back plate section 40. The mirror section 50 is formed, for example, as a thin plate with an outer shape substantially the same as that of the back plate section 40. As shown in FIG. 1 , the mirror unit 30 is designed so that when the mirror section 50 is viewed from the front, no components other than the mirror section 50 are visible. That is, the entire surface 50a of the mirror section 50 is exposed. As a result, the entire surface 50a of the mirror unit 30 is a mirror surface, resulting in a clean design. An engagement portion 61 of the fall prevention section 60, which will be described later, is bonded to the back surface 50b of the mirror section 50 by the second adhesive portion 63. The mirror unit 30 does not have a frame or the like that prevents the fall prevention section 60 from preventing the mirror section 50 from falling off the back plate section 40.

[0034] When a mirror unit is installed near a water-related appliance, such as a bathroom, changing room, washroom, kitchen, or toilet, water droplets and dirt tend to adhere to the mirror. In such cases, when wiping off water droplets or dirt from the mirror, the mirror unit may lose its appearance due to water droplets and dirt seeping in between the mirror and the frame. Furthermore, the gap between the mirror and the frame may easily become dirty, which may impair the cleanliness of the mirror unit.

[0035] In contrast, the mirror unit 30 does not support the mirror part 50 with a frame or the like. The entire surface 50a of the mirror part 50 is a flat mirror surface. Therefore, if water droplets or dirt adhere to the surface 50a of the mirror part 50 of the mirror unit 30, the water droplets or dirt can be easily wiped off. This reduces the amount of water droplets or dirt remaining on the surface 50a of the mirror part 50, so the mirror unit 30 looks good and can be kept clean. Furthermore, because the surface 50a of the mirror part 50 is flat, it can be easily cleaned without getting caught on cleaning tools such as rags.

[0036] As shown in Fig. 2, a plane heater 52 is provided on the back surface 50b of the mirror portion 50. The plane heater 52 is connected to a power source. The plane heater 52 heats the mirror portion 50, thereby preventing the mirror portion 50 from fogging up. The plane heater 52 is provided as needed and is not necessarily required.

[0037] The fall suppression portion 60 is provided between the back plate portion 40 and the mirror portion 50. The fall suppression portion 60 supports the mirror portion 50 when the adhesive strength of the first adhesive portion 47 decreases and the mirror portion 50 moves downward relative to the back plate portion 40. In other words, the fall suppression portion 60 suppresses the mirror portion 50 from falling off the back plate portion 40.

[0038] 1, the fall prevention unit 60 is provided above 50% of the length of the mirror unit 50 in the height direction (vertical direction). In FIG. 1, the center of the height direction of the mirror unit 50 (50% position) is indicated by a dashed dotted line OO. The fall prevention unit 60 has an engaging portion 61 provided on the back surface 50b of the mirror unit 50 and an engaged portion 65 provided on the front surface 41 of the back plate 40.

[0039] The engaging portion 61 is attached to the back surface 50b of the mirror portion 50 by the second adhesive portion 63. That is, a part of the fall suppression portion 60 (the engaging portion 61) is adhered to the mirror portion 50 by the second adhesive portion 63. The second adhesive portion 63 is, for example, double-sided tape or adhesive. This eliminates the need to drill or process holes to attach the engaging portion 61 to the mirror portion 50, allowing the mirror portion 50 to be made as thin as possible. As a result, the weight of the mirror portion 50 can be reduced.

[0040] One engaging portion 61 is provided in the center of the mirror portion 50 in the left-right direction. Note that multiple engaging portions 61 may be provided on the back surface 50b of the mirror portion 50. It is also preferable that the engaging portion 61 is provided on the upper end side of the mirror portion 50. This separates the second adhesive portion 63 from the planar heater 52, thereby preventing a decrease in adhesive strength due to heat generation by the planar heater 52.

[0041] The engagement portion 61 has a first portion 61a adhered to the second adhesive portion 63, a second portion 61b extending from the first portion 61a toward the inner portion 41a (rear) of the back plate 40, and a third portion 61c extending downward from the second portion 61b. The engagement portion 61 is formed into a hook shape that is open downward by the first to third portions 61a to 61c. In this example, the lower end of the third portion 61c is located lower than the lower end of the first portion 61a.

[0042] The engagement portion 61 is located in the space S2 between the inner portion 41a and the mirror portion 50. As a result, the engagement portion 61 is located more inward than the frame portion 41b, and is therefore not visible when the mirror unit 30 is viewed from the side. As a result, the mirror unit 30 has a neat and sleek design.

[0043] The engaged portion 65 is attached to the back plate 40. Specifically, the engaged portion 65 is attached to the holes 43 of the third connecting portion 41e and the fourth connecting portion 41f. The engaged portion 65 is located in front of the inner portion 41a and extends between the third connecting portion 41e and the fourth connecting portion 41f. That is, the engaged portion 65 is located within the space S2. The engaged portion 65 is, for example, a rod-shaped cylindrical body with a filled interior.

[0044] The engaged portion 65 may be, for example, a rectangular column. The engaged portion 65 may also be a hollow cylinder. Furthermore, the engaged portion 65 may be a string or wire stretched between the third connecting portion 41e and the fourth connecting portion 41f. The engaged portion 65 may be of any shape or material as long as it can engage with the engaging portion 61. The engaged portion 65 is not limited to being attached to the third connecting portion 41e and the fourth connecting portion 41f, but may be attached to any position on the back plate 40, such as the first connecting portion 41c, as long as it can engage with the engaging portion 61.

[0045] As shown in Figure 4, when the mirror unit 50 is attached to the back plate 40, the engaged portion 65 is located within the engaging portion 61. That is, the engaged portion 65 is located below the second portion 61b of the engaging portion 61 and in front of the third portion 61c. In this case, the engaging portion 61 and the engaged portion 65 are not in contact with each other. As a result, no force is applied to the engaging portion 61 from the engaged portion 65, which prevents the engaging portion 61 from peeling off from the mirror unit 50.

[0046] FIG. 5 is a cross-sectional view showing a case where the mirror portion is peeled off from the back plate portion. The mirror portion 50 may peel off from the back plate portion 40 in two ways: the mirror portion 50 may peel off from the first adhesive portion 47, or the first adhesive portion 47 may peel off from the back plate portion 40. Figure 5 shows the case where the mirror portion 50 has peeled off from the first adhesive portion 47, as indicated by the arrow.

[0047] When the mirror part 50 moves downward relative to the back plate part 40, the engaging part 61 of the fall prevention part 60 engages with the engaged part 65 inside the frame part 41b (space S2). That is, when the mirror part 50 moves relative to the back plate part 40, the engaging part 61 of the fall prevention part 60 moves together with the mirror part 50 and comes into contact with the engaged part 65. As a result, the engaging part 61 of the mirror part 50 is supported by the engaged part 65, and further movement of the mirror part 50 is restricted. Therefore, the mirror unit 30 prevents the mirror part 50 from falling off the back plate part 40.

[0048] The fall prevention part 60 is provided between the back plate part 40 and the mirror part 50. This allows the mirror unit 30 to have the entire surface 50a of the mirror part 50 as a mirror surface without using a frame or the like to support the mirror part 50. Furthermore, the fall prevention part 60 is not visible from the outside. This results in a mirror unit 30 with excellent design.

[0049] The engaging portion 61 is adhered to the rear surface 50b of the mirror portion 50 by the second adhesive portion 63. The dimensional relationship for preventing the engaging portion 61 from peeling off from the mirror portion 50 will now be described with reference to FIGS. FIG. 6 is an explanatory diagram showing the dimensional relationship between the mirror portion, the back plate portion, the second adhesive portion, and the engagement portion. FIG. 7 is an explanatory diagram showing a case where the engaging portion is separated from the mirror portion.

[0050] 6, in a cross-sectional view, the lower end of the first portion 61a of the engagement portion 61 is designated as point A1, and the upper end of the first portion 61a is designated as point B1. Point C1 is located on the second portion 61b or the third portion 61c, above point A1, has the largest dimension from point A1, and is closest to the back plate portion 40. Note that "above point A1" includes the same position as point A1 in the height direction.

[0051] The dimension of the line segment connecting points A1 and B1 is defined as h1. That is, dimension h1 is the height dimension of the first portion 61a. The dimension of the line segment connecting points A1 and C1 is defined as L1. The angle formed by line segments A1B1 and A1C1 is defined as α1. The thickness dimension of the second adhesive portion 63 is defined as t1. The tolerance coefficient K1 of the second adhesive portion 63 is defined as K1. The tolerance coefficient K1 is a coefficient that determines the degree of peeling that is guaranteed. The tolerance coefficient K1 depends on the material and performance of the members related to the second adhesive portion 63, and is determined by calculation or experimental values, empirical values, etc. The tolerance coefficient K1 can be set to 1 or 2, for example.

[0052] The dimension between the mirror portion 50 and the back plate portion 40 is defined as D1. That is, the dimension D1 is the depth dimension (front-to-rear dimension) of the space S2 between the rear surface 50b of the mirror portion 50 and the inner portion 41a. The depth dimension (front-to-rear dimension) from the rear surface 50b of the mirror portion 50 to the rear end of the engagement portion 61 is defined as d1. That is, the dimension d1 is the dimension obtained by adding the thickness dimension t1 of the second adhesive portion 63 to the front-to-rear dimension of the engagement portion 61.

[0053] In this case, when the dimension L1≧the dimension d1, the following formulas (1) and (2) are satisfied, and when the dimension L1<the dimension d1, the following formula (3) is satisfied. d1≦D1≦L1sin(α1+β1)…(1) β1=arcsin(K1×t1 / h1)…(2) D1=d1…(3)

[0054] In this example, dimension L1≧d1. Therefore, the dimensions of each component satisfy formulas (1) and (2). As a result, as shown in FIG. 7, when the engaging portion 61 begins to peel off from the mirror portion 50, the engaging portion 61 comes into contact with the inner portion 41a of the back plate portion 40, thereby suppressing movement. In this state, of the vertical and horizontal forces acting on the second adhesive portion 63, the horizontal force is suppressed. Therefore, by suppressing the resultant force acting on the engaging portion 61, it is possible to prevent the engaging portion 61 from separating. Note that the case where formula (3) is satisfied when dimension L1<d1 will be described in the tenth embodiment below.

[0055] Next, a second embodiment of the present invention will be described with reference to Figures 8 and 9. In the second embodiment, the engaging portion and the engaged portion of the fall-preventing portion are made of the same member. FIG. 8 is an exploded perspective view showing a cabinet equipped with a mirror unit according to the second embodiment. FIG. 9 is an enlarged cross-sectional view showing the fall prevention portion.

[0056] The fall prevention portion 70 is provided between the back plate portion 40 and the mirror portion 50. The fall prevention portion 70 has an engaging portion 61 and an engaged portion 71. The engaging portion 61 and the engaged portion 71 are made of the same member.

[0057] The engaged portion 71 is attached to the inner portion 41a of the back plate 40 at a position corresponding to the engaging portion 61. The engaged portion 71 is attached to the inner portion 41a by a third adhesive portion 73 with the engaging portion 61 turned upside down. The third adhesive portion 73 is, for example, double-sided tape or adhesive. The engaged portion 71 may also be attached to the inner portion 41a by a screw or the like.

[0058] The engaged portion 71 has a first portion 71a adhered to the third adhesive portion 73, a second portion 71b extending from the first portion 71a toward the mirror portion 50 (front), and a third portion 71c extending upward from the second portion 71b. The engaged portion 71 is formed into a hook shape that is open at the top by the first to third portions 71a to 71c. In this example, the upper end of the third portion 71c is located higher than the upper end of the first portion 71a.

[0059] 9, when the mirror unit 50 is attached to the back plate 40, the third portion 71c of the engaged portion 71 is located within the engaging portion 61. That is, the third portion 71c of the engaged portion 71 is located below the second portion 61b of the engaging portion 61 and in front of the third portion 61c. In this case, the engaging portion 61 and the engaged portion 71 are not in contact with each other. As a result, no force is applied to the engaging portion 61 from the engaged portion 71, which prevents the engaging portion 61 from peeling off from the mirror unit 50.

[0060] When the mirror unit 50 moves downward relative to the back plate 40, the engaging portion 61 engages with the engaged portion 71 inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the engaging portion 61 of the fall prevention unit 70 moves together with the mirror unit 50 and comes into contact with the engaged portion 71. As a result, the engaging portion 61 of the mirror unit 50 is supported by the engaged portion 71, and further movement of the mirror unit 50 is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0061] Next, a third embodiment of the present invention will be described with reference to Figures 10 and 11. In the third embodiment, two fall prevention portions are provided spaced apart in the left-right direction. FIG. 10 is an exploded perspective view showing a cabinet equipped with a mirror unit according to the third embodiment. FIG. 11 is an enlarged cross-sectional view showing the fall prevention portion.

[0062] The fall prevention portion 80 is provided between the back plate portion 40 and the mirror portion 50. The fall prevention portion 80 is provided on each of the left portion 41b3 side and the right portion 41b4 side of the frame portion 41b of the back plate portion 40. The fall prevention portion 80 has an engaging portion 81 attached to the mirror portion 50 and an engaged portion 83 attached to the back plate portion 40.

[0063] The engagement portion 81 has a first portion 81a adhered to the second adhesive portion 63, a second portion 81b extending from the first portion 81a toward the inner portion 41a (rear) of the back plate portion 40, and a third portion 81c extending downward from the second portion 81b. The engagement portion 81 is formed into a hook shape that is open downward by the first to third portions 81a to 81c. In this example, the lower end of the third portion 81c is located higher than the lower end of the first portion 81a. It is preferable that the engagement portion 81 be provided on the upper end side of the mirror portion 50. This separates the second adhesive portion 63 from the planar heater 52, thereby preventing a decrease in adhesive strength due to heat generation from the planar heater 52.

[0064] The engaged portions 83 are provided on the third connecting portion 41e and the fourth connecting portion 41f of the back plate 40 at positions corresponding to the engaging portions 81. The engaged portions 83 have a first portion 83a attached to the third and fourth connecting portions 41e, 41f, and a second portion 83b extending in the left-right direction from the first portion 83a. That is, the engaged portions 83 are formed in an L shape by the first portion 83a and the second portion 83b.

[0065] The second portion 83b is located in the space S2 between the inner portion 41a and the mirror portion 50. The engaged portion 83 is adhered to the third and fourth connecting portions 41e, 41f by, for example, double-sided tape or adhesive. The engaged portion 83 may also be attached to the third and fourth connecting portions 41e, 41f by, for example, screws.

[0066] 11, when the mirror unit 50 is attached to the back plate 40, the second portion 83b of the engaged portion 83 is located within the engaging portion 81. That is, the second portion 83b of the engaged portion 83 is located below the second portion 81b of the engaging portion 81 and in front of the third portion 81c. In this case, the engaging portion 81 and the engaged portion 83 are not in contact with each other. As a result, no force is applied to the engaging portion 81 from the engaged portion 83, which prevents the engaging portion 81 from peeling off from the mirror unit 50.

[0067] When the mirror unit 50 moves downward relative to the back plate 40, the engaging portion 81 engages with the engaged portion 83 inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the engaging portion 81 of the fall suppression portion 80 moves together with the mirror unit 50 and comes into contact with the engaged portion 83. As a result, the engaging portion 81 of the mirror unit 50 is supported by the engaged portion 83, and further movement of the mirror unit 50 is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0068] Next, a fourth embodiment of the present invention will be described with reference to Figures 12 and 13. In the fourth embodiment, two fall prevention portions are provided spaced apart in the left-right direction. FIG. 12 is a front view showing a cabinet equipped with a mirror unit according to the fourth embodiment. FIG. 13 is a cross-sectional view of the cabinet in FIG. 12 as viewed from the direction of arrow CC.

[0069] The fall suppression portion 90 is provided between the back plate 40 and the mirror portion 50. The fall suppression portion 90 is provided on each of the left portion 41b3 and the right portion 41b4 of the frame portion 41b of the back plate 40. Note that the fall suppression portion 90 may be provided, for example, in the center in the left-right direction, or three or more fall suppression portions 90 may be provided spaced apart in the left-right direction. The fall suppression portion 90 has a first attachment portion 91 attached to the mirror portion 50, a second attachment portion 93 attached to the back plate 40, and a string-like member 95 connecting the first attachment portion 91 and the second attachment portion 93.

[0070] The first attachment portion 91 is attached to the back surface 50b of the mirror portion 50. As shown in Fig. 13, the first attachment portion 91 is formed with an L-shaped cross section and is adhered to the back surface 50b of the mirror portion 50 by the second adhesive portion 63. The first attachment portion 91 is preferably provided on the upper end side of the mirror portion 50. This separates the second adhesive portion 63 from the planar heater 52, thereby preventing a decrease in adhesive strength due to heat generation from the planar heater 52.

[0071] The second attachment portion 93 is attached to the first connection portion 41c of the back plate 40. As shown in Fig. 13, the second attachment portion 93 has an L-shaped cross section and is adhered to the first connection portion 41c by a third adhesive portion 73. The second attachment portion 93 may also be attached to the back plate 40 by a screw or the like.

[0072] One end of the string-like member 95 is fixed to the first attachment portion 91, and the other end is fixed to the second attachment portion 93. The string-like member 95 is made of, for example, cloth, leather, synthetic fiber, or wire. As shown in FIG. 13 , when the mirror portion 50 is attached to the back plate portion 40, the string-like member 95 is loose. This prevents force from acting on the first attachment portion 91 from the string-like member 95, thereby preventing the first attachment portion 91 from peeling off from the mirror portion 50. The string-like member 95 may also be attached directly to the back plate portion 40 and the mirror portion 50, instead of to the first and second attachment portions 91 and 93.

[0073] When the mirror unit 50 moves downward relative to the back plate 40, the string-like member 95 is stretched inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the first attachment portion 91 of the fall-prevention unit 90 moves together with the mirror unit 50, pulling the string-like member 95. As a result, the mirror unit 50 is supported by the string-like member 95, and further movement is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0074] Next, a fifth embodiment of the present invention will be described with reference to Figures 14 and 15. In the fifth embodiment, a cloth-like fall prevention part is provided. FIG. 14 is a front view showing a cabinet equipped with a mirror unit according to the fifth embodiment. FIG. 15 is a cross-sectional view of the cabinet in FIG. 14 as viewed from the direction of the arrow DD.

[0075] The fall prevention unit 100 is provided between the back plate unit 40 and the mirror unit 50. The fall prevention unit 100 is a cloth-like member made of, for example, cloth, leather, or synthetic fiber, and one end is fixed to the back plate unit 40 and the other end is fixed to the mirror unit 50. One fall prevention unit 100 is provided in the center in the left-right direction. However, two or more fall prevention units 100 may be provided spaced apart in the left-right direction.

[0076] The fall suppression unit 100 is adhered to the back surface 50b of the mirror unit 50 by the second adhesive portion 63. The other end of the fall suppression unit 100 is preferably provided on the upper end side of the mirror unit 50. This separates the second adhesive portion 63 from the planar heater 52, thereby preventing a decrease in adhesive strength due to heat generation by the planar heater 52. Meanwhile, the fall suppression unit 100 is adhered to the first connecting portion 41c of the back plate 40 by, for example, the third adhesive portion 73. Note that the fall suppression unit 100 is not limited to being adhered to the first connecting portion 41c, and may also be adhered to the inner portion 41a, the frame portion 41b, or the like. The fall suppression unit 100 may also be fixed to the back plate 40 by, for example, screws.

[0077] 15, when the mirror part 50 is attached to the back plate part 40, the fall-prevention part 100 is loosened. This reduces the force acting on the second adhesive part 63 of the fall-prevention part 100, thereby preventing the fall-prevention part 100 from peeling off from the mirror part 50.

[0078] When the mirror part 50 moves downward relative to the back plate part 40, the fall suppression part 100 is stretched inside the frame part 41b (space S2). As a result, the mirror part 50 is supported by the fall suppression part 100, and further movement is restricted. Therefore, the mirror part 50 is prevented from falling from the back plate part 40.

[0079] Next, a sixth embodiment of the present invention will be described with reference to Figures 16 to 19. In the sixth embodiment, a mirror portion is also provided on the rear surface side of the mirror portion 50. FIG. 16 is an exploded perspective view showing a cabinet equipped with a mirror unit according to the sixth embodiment. FIG. 17 is an enlarged cross-sectional view showing the fall restraint section and the lower end of the cabinet. FIG. 18 is an explanatory diagram showing the dimensional relationship between the mirror portion, the back plate portion, the third adhesive portion, and the engaged portion. FIG. 19 is an explanatory diagram showing a case where the engaged portion is peeled off from the back plate portion.

[0080] In addition to the mirror portion 50, part of the back plate portion 40 of the mirror unit 30 is also a mirror portion. The surface of the back plate portion 40 opposite the inner portion 41a is a mirror surface. In other words, both the front and back surfaces of the exposed surface of the mirror unit 30 are mirror surfaces. The user can use the mirror with the mirror unit 30 both in the closed and open positions.

[0081] The back plate 40 has a main body 110 having a frame 41b and first to fourth connection portions 41c to 41f on its surface 41, and another mirror portion 115 having an inner portion 41a on its surface 41. As shown in Fig. 17, an upper frame 120 and a lower frame 125 are provided at the upper and lower ends of the main body 110. The upper frame 120 and the lower frame 125 are fixed to the main body 110 with screws, for example.

[0082] The upper frame 120 and the lower frame 125 are formed in an L-shape and restrict movement of the other mirror portion 115. The upper frame 120 presses the other mirror portion 115 from above. The lower frame 125 supports the other mirror portion 115 from below.

[0083] The upper frame 120 and the lower frame 125 are located on the back side of the mirror unit 50. That is, the upper end of the mirror unit 50 is located higher than the upper frame 120. The lower end of the mirror unit 50 is located lower than the lower frame 125. Therefore, the upper frame 120 and the lower frame 125 are not visible when the mirror unit 50 is viewed from the front.

[0084] The fall prevention portion 130 is provided between the back plate portion 40 and the mirror portion 50. The fall prevention portion 130 has an engaging portion 131 and an engaged portion 135.

[0085] The engaging portion 131 has a first portion 131a adhered to the rear surface 50b of the mirror portion 50 by the second adhesive portion 63, a second portion 131b spaced apart in the left-right direction from the first portion 131a and adhered to the rear surface 50b of the mirror portion 50 by the second adhesive portion 63, and a third portion 131c connecting the first portion 131a and the second portion 131b. A gap is formed between the third portion 131c and the mirror portion 50. The engaging portion 131 is formed into a U-shape by the first to third portions 131a to 131c. It is preferable that the engaging portion 131 be provided on the upper end side of the mirror portion 50. This separates the second adhesive portion 63 from the planar heater 52, thereby preventing a decrease in adhesive strength due to heat generation from the planar heater 52.

[0086] The engaged portion 135 has a shape similar to that of the engaged portion 71 of the second embodiment. Like the engaged portion 71, the engaged portion 135 has a first portion 135a, a second portion 135b, and a third portion 135c. The first portion 135a of the engaged portion 135 is bonded to the inner portion 41a of the back plate 40 by the third adhesive portion 73. This eliminates the need to drill or process holes in the other mirror portion 115 to attach the engaged portion 135, allowing the other mirror portion 115 to be as thin as possible. As a result, the weight of the other mirror portion 115 can be reduced. One engaged portion 135 is provided in the center of the other mirror portion 115 in the left-right direction. Note that multiple engaged portions 135 may be provided between the first portion 131a and the second portion 131b of the engaging portion 131. Also, multiple engaging portions 131 and multiple engaged portions 135 may be provided.

[0087] 17, when the mirror unit 50 is attached to the back plate 40, the third portion 131c of the engaging portion 131 is located within the engaged portion 135. That is, the third portion 131c of the engaging portion 131 is located above the second portion 135b of the engaged portion 135 and behind the third portion 135c. In this case, the engaging portion 131 and the engaged portion 135 are in a non-contact state. As a result, the engaging portion 131 and the engaged portion 135 do not exert force on each other, which prevents the engaging portion 131 from peeling off from the mirror unit 50 and prevents the engaged portion 135 from peeling off from the other mirror units 115.

[0088] When the mirror unit 50 moves downward relative to the back plate 40, the engaging portion 131 engages with the engaged portion 135 inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the engaging portion 131 of the fall suppression unit 130 moves together with the mirror unit 50 and comes into contact with the engaged portion 135. As a result, the engaging portion 131 of the mirror unit 50 is supported by the engaged portion 135, and further movement of the mirror unit 50 is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0089] The engaged portion 135 is adhered to the inner portion 41a by the third adhesive portion 73. The dimensional relationship for preventing the engaged portion 135 from peeling off from the inner portion 41a will now be described with reference to FIGS. 18 and 19.

[0090] 18, in a cross-sectional view, the lower end of the first portion 135a of the engaged portion 135 is designated as point A2, and the upper end of the first portion 135a is designated as point B2. Point C2 is located on the second portion 135b or the third portion 135c, above point A2, has the largest dimension from point A2, and is closest to the mirror portion 50. Note that "above point A2" includes the same position as point A2 in the height direction.

[0091] The dimension of the line segment connecting points A2 and B2 is defined as h2. That is, dimension h2 is the height dimension of the first portion 135a. The dimension of the line segment connecting points A2 and C2 is defined as L2. The angle formed by line segments A2B2 and A2C2 is defined as α2. The thickness dimension of the third adhesive portion 73 is defined as t2. The tolerance coefficient K2 of the third adhesive portion 73 is a coefficient that determines the degree of peeling that is guaranteed. The tolerance coefficient K2 depends on the material and performance of the members related to the third adhesive portion 73, and is determined by calculation or experimental values, empirical values, etc. The tolerance coefficient K2 can be set to 1 or 2, for example.

[0092] The dimension between the mirror portion 50 and the back plate portion 40 is defined as D2. That is, the dimension D2 is the depth dimension (front-rear dimension) of the space S2 between the back surface 50b of the mirror portion 50 and the inner portion 41a. The depth dimension (front-rear dimension) from the inner portion 41a of the back plate portion 40 to the front end of the engaged portion 135 is defined as d2. That is, the dimension d2 is the dimension obtained by adding the thickness dimension t2 of the third adhesive portion 73 to the front-rear dimension of the engaged portion 135.

[0093] In such a case, the following formulas (4) and (5) are satisfied. d2≦D2≦L2sin(α2+β2)…(4) β2=arcsin(K2×t2 / h2)…(5)

[0094] 19, when the engaged portion 135 begins to peel off from the back plate 40, the engaged portion 135 comes into contact with the rear surface 50b of the mirror portion 50, thereby restricting its movement. In this state, of the forces acting vertically and horizontally on the third adhesive portion 73, the horizontal force is restricted. Therefore, by restricting the resultant force acting on the engaged portion 135, it is possible to restrict the engaged portion 135 from coming off.

[0095] Next, a seventh embodiment of the present invention will be described with reference to Figures 20 and 21. In the seventh embodiment, a curved portion is provided in the second region of the engagement portion. FIG. 20 is an explanatory view similar to FIG. 6, showing a fall restraining section according to the seventh embodiment. FIG. 21 is an explanatory view similar to FIG. 7, showing a case where the engaging portion is peeled off from the mirror portion.

[0096] The fall prevention part 150 is provided between the back plate part 40 and the mirror part 50. The fall prevention part 150 has an engaging part 151 and an engaged part 65. Note that the engaged part 65 may have any shape or configuration as long as it can engage with the engaging part 151 when the mirror part 50 moves relative to the back plate part 40.

[0097] The engaging portion 151 is provided in place of the engaging portion 61 of the first embodiment. The engaging portion 151 has a first portion 152 adhered to the second adhesive portion 63, a second portion 153 extending from the first portion 152 toward the back plate portion 40, and a third portion 154 extending downward from the second portion 153.

[0098] The second portion 153 has a horizontal portion 153a extending horizontally from the first portion 152 toward the back plate portion 40, and a curved portion 153b connecting the horizontal portion 153a and the third portion 154. The curved portion 153b is formed in a curved shape that protrudes outward.

[0099] As shown in Figure 20, when mirror unit 50 is attached to back plate 40, engaged portion 65 is located within engaging portion 151. That is, engaged portion 65 is located below second portion 153 of engaging portion 151 and in front of third portion 154. In this case, engaging portion 151 and engaged portion 65 are not in contact with each other. As a result, no force is applied to engaging portion 151 from engaged portion 65, which prevents engaging portion 151 from peeling off from mirror unit 50.

[0100] When the mirror unit 50 moves downward relative to the back plate 40, the engaging portion 151 engages with the engaged portion 65 inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the engaging portion 151 of the fall suppression portion 150 moves together with the mirror unit 50 and comes into contact with the engaged portion 65. As a result, the engaging portion 151 of the mirror unit 50 is supported by the engaged portion 65, and further movement of the mirror unit 50 is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0101] 20, the engaging portion 151 is located on the second portion 153 or the third portion 154, and a point C1, which is located above the point A1, has the largest distance from the point A1, and is closest to the back plate portion 40, is located on the curved portion 153b. In this case, the engaging portion 151 has a dimension L1≧d1. Therefore, each member is set to satisfy the above-mentioned formula (1) and formula (2).

[0102] 21, when the engaging portion 151 begins to peel off from the mirror portion 50, the engaging portion 151 comes into contact with the inner portion 41a of the back plate 40, thereby restricting movement. In this state, of the forces acting vertically and horizontally on the second adhesive portion 63, the force acting horizontally is restricted. Therefore, by restricting the resultant force acting on the engaging portion 151, it is possible to prevent the engaging portion 151 from coming off.

[0103] Next, an eighth embodiment of the present invention will be described with reference to Figures 22 and 23. In the eighth embodiment, the second portion of the engagement portion is formed in a curved shape. FIG. 22 is an explanatory view similar to FIG. 6, showing a fall restraining section according to the eighth embodiment. FIG. 23 is an explanatory view similar to FIG. 7, showing a case where the engaging portion is peeled off from the mirror portion.

[0104] The fall prevention portion 160 is provided between the back plate portion 40 and the mirror portion 50. The fall prevention portion 160 has an engaging portion 161 and an engaged portion 65. Note that the engaged portion 65 may have any shape or configuration as long as it can engage with the engaging portion 161 when the mirror portion 50 moves relative to the back plate portion 40.

[0105] The engaging portion 161 is provided in place of the engaging portion 61 of the first embodiment. The engaging portion 161 has a first portion 162 adhered to the second adhesive portion 63, a second portion 163 extending from the first portion 162 toward the back plate portion 40, and a third portion 164 extending downward from the second portion 163. As shown in FIG. 22 , the second portion 163 is formed in a curved shape that protrudes upward.

[0106] 22, when the mirror unit 50 is attached to the back plate 40, the engaged portion 65 is located within the engaging portion 161. That is, the engaged portion 65 is located below the second portion 163 of the engaging portion 161 and in front of the third portion 164. In this case, the engaging portion 161 and the engaged portion 65 are not in contact with each other. As a result, no force is applied to the engaging portion 161 from the engaged portion 65, which prevents the engaging portion 161 from peeling off from the mirror unit 50.

[0107] When the mirror unit 50 moves downward relative to the back plate 40, the engaging portion 161 engages with the engaged portion 65 inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the engaging portion 161 of the fall suppression portion 160 moves together with the mirror unit 50 and comes into contact with the engaged portion 65. As a result, the engaging portion 161 of the mirror unit 50 is supported by the engaged portion 65, and further movement of the mirror unit 50 is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0108] 22, the engaging portion 161 is located on the second portion 163 or the third portion 164, and a point C1, which is located above the point A1, has the largest distance from the point A1, and is closest to the back plate portion 40, is located on the second portion 163. In this case, the engaging portion 161 has a dimension L1≧d1. Therefore, each member is set to satisfy the above-mentioned formula (1) and formula (2).

[0109] 23, when the engaging portion 161 begins to peel off from the mirror portion 50, the engaging portion 161 comes into contact with the inner portion 41a of the back plate 40, thereby restricting movement. In this state, of the forces acting vertically and horizontally on the second adhesive portion 63, the horizontal force is restricted. Therefore, by restricting the resultant force acting on the engaging portion 161, it is possible to prevent the engaging portion 161 from coming off.

[0110] Next, a ninth embodiment of the present invention will be described with reference to Figures 24 and 25. In the ninth embodiment, the engaging portion is formed in a crank shape. FIG. 24 is an explanatory view similar to FIG. 6, showing a fall restraining section according to the ninth embodiment. FIG. 25 is an explanatory view similar to FIG. 7, showing a case where the engaging portion is peeled off from the mirror portion.

[0111] The fall prevention portion 170 is provided between the back plate portion 40 and the mirror portion 50. The fall prevention portion 170 has an engaging portion 171 and an engaged portion 65. Note that the engaged portion 65 may have any shape or configuration as long as it can engage with the engaging portion 171 when the mirror portion 50 moves relative to the back plate portion 40.

[0112] The engaging portion 171 is provided in place of the engaging portion 61 of the first embodiment. The engaging portion 171 has a first portion 172 adhered to the second adhesive portion 63, a second portion 173 extending from the first portion 172 toward the back plate portion 40, and a third portion 174 extending downward from the second portion 173. As shown in FIG. 24 , the second portion 173 extends horizontally from the lower end of the first portion 172 toward the back plate portion 40. As a result, the engaging portion 171 is formed in a crank shape by the first to third portions 172 to 174.

[0113] 24, when mirror 50 is attached to back plate 40, engaged portion 65 is located within engaging portion 171. That is, engaged portion 65 is located below second portion 173 of engaging portion 171 and in front of third portion 174. In this case, engaging portion 171 and engaged portion 65 are not in contact with each other. As a result, no force is applied to engaging portion 171 from engaged portion 65, which prevents engaging portion 171 from peeling off from mirror 50.

[0114] When the mirror unit 50 moves downward relative to the back plate 40, the engaging portion 171 engages with the engaged portion 65 inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the engaging portion 171 of the fall suppression portion 170 moves together with the mirror unit 50 and comes into contact with the engaged portion 65. As a result, the engaging portion 171 of the mirror unit 50 is supported by the engaged portion 65, and further movement of the mirror unit 50 is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0115] 24, the engaging portion 171 is located on the second portion 173 or the third portion 174, and point C1, which is located above point A1, has the largest dimension from point A1, and is closest to the back plate portion 40, is located on the second portion 173. In this case, the engaging portion 171 has dimension L1≧d1. Therefore, each member is set to satisfy the above-mentioned formula (1) and formula (2).

[0116] 25, when the engaging portion 171 begins to peel off from the mirror portion 50, the engaging portion 171 comes into contact with the inner portion 41a of the back plate 40, thereby restricting movement. In this state, of the forces acting vertically and horizontally on the second adhesive portion 63, the force acting horizontally is restricted. Therefore, by restricting the resultant force acting on the engaging portion 171, it is possible to prevent the engaging portion 171 from coming off.

[0117] Next, a tenth embodiment of the present invention will be described with reference to Fig. 26. In the tenth embodiment, the second portion 173 of the engaging portion 171 of the ninth embodiment has a curved portion. FIG. 26 is an explanatory view similar to FIG. 6, showing a fall restraining section according to the tenth embodiment.

[0118] The fall prevention part 180 is provided between the back plate part 40 and the mirror part 50. The fall prevention part 180 has an engaging part 181 and an engaged part 65. Note that the engaged part 65 may have any shape or configuration as long as it can engage with the engaging part 181 when the mirror part 50 moves relative to the back plate part 40.

[0119] The engaging portion 181 is provided in place of the engaging portion 61 of the first embodiment. The engaging portion 181 has a first portion 182 adhered to the second adhesive portion 63, a second portion 183 extending from the first portion 182 toward the back plate portion 40, and a third portion 184 extending downward from the second portion 183. As shown in FIG. 26 , the second portion 183 has a horizontal portion 183a extending horizontally from the lower end of the first portion 182 toward the back plate portion 40, and a curved portion 183b connecting the horizontal portion 183a and the third portion 184. The curved portion 183b is formed in a curved shape that protrudes outward. As a result, the engaging portion 181 is formed in a crank shape by the first to third portions 182 to 184.

[0120] 26, when mirror unit 50 is attached to back plate 40, engaged portion 65 is located within engaging portion 181. That is, engaged portion 65 is located below second portion 183 of engaging portion 181 and in front of third portion 184. In this case, engaging portion 181 and engaged portion 65 are not in contact with each other. As a result, no force is applied to engaging portion 181 from engaged portion 65, which prevents engaging portion 181 from peeling off from mirror unit 50.

[0121] When the mirror unit 50 moves downward relative to the back plate 40, the engaging portion 181 engages with the engaged portion 65 inside the frame portion 41b (space S2). That is, when the mirror unit 50 moves relative to the back plate 40, the engaging portion 181 of the fall suppression portion 180 moves together with the mirror unit 50 and comes into contact with the engaged portion 65. As a result, the engaging portion 181 of the mirror unit 50 is supported by the engaged portion 65, and further movement of the mirror unit 50 is restricted. Therefore, the mirror unit 50 is prevented from falling off the back plate 40.

[0122] 26, the engaging portion 181 is located on the second portion 183 or the third portion 184, and a point C1, which is located above the point A1, has the largest dimension from the point A1, and is closest to the back plate portion 40, is located on the curved portion 183b. In this case, the engaging portion 181 has a dimension L1<d1. Therefore, each member is set to satisfy the above-mentioned formula (3).

[0123] As shown in FIG. 26, when dimension L1<d1, dimension D1 between mirror portion 50 and back plate 40 is the same as dimension d1, which is the depth dimension (front-rear dimension) from back surface 50b of mirror portion 50 to the rear end of engagement portion 181 (D1=d1). That is, third portion 184 of engagement portion 181 is brought into contact with inner portion 41a of back plate 40. In other words, engagement portion 181 is sandwiched between back plate 40 and mirror portion 50. Note that the force acting from back plate 40 on third portion 184 of engagement portion 181 is set to be as small as possible. That is, back plate 40 is not actively pressing engagement portion 181.

[0124] By bringing the third portion 184 into contact with the inner portion 41a of the back plate 40, a static friction force is generated between the third portion 184 and the inner portion 41a. This static friction force reduces the force that moves the engaging portion 181 downward. Therefore, it is possible to prevent the engaging portion 181 from peeling off from the mirror portion 50.

[0125] In the above-described embodiment, the mirror unit 30 constitutes the front surface of the shelf 20. However, the present invention is not limited to this, and the mirror unit 30 may be attached directly to the wall of a room, for example.

[0126] Embodiments may include the following features.

[0127] (Configuration 1) A back plate portion and a first adhesive portion adhered to a surface of the back plate portion; a mirror portion facing the back plate portion and bonded to the first adhesive portion; In a mirror unit comprising: A mirror unit characterized by having a fall prevention portion provided between the back plate portion and the mirror portion, which supports the mirror portion when the mirror portion moves downward relative to the back plate portion. (Configuration 2) The mirror unit according to configuration 1, wherein a portion of the fall prevention portion is adhered to the mirror portion by a second adhesive portion. (Configuration 3) The fall prevention unit is an engagement portion provided on a rear surface of the mirror portion; an engaged portion provided on a surface of the back plate portion, the engaged portion engaging with the engaging portion when the mirror portion moves downward relative to the back plate portion; 3. The mirror unit according to claim 1 or 2, comprising: (Configuration 4) The surface of the back plate portion is The inner part and a frame portion that protrudes forward from the inner portion and surrounds the periphery of the inner portion; and The mirror unit described in configuration 3 is characterized in that when the mirror portion moves downward relative to the back plate portion, the fall prevention portion engages with the engaged portion inside the frame portion. (Configuration 5) The engagement portion is a first portion adhered to the second adhesive portion; a second portion extending from the first portion toward the back plate portion; a third portion extending downward from the second portion; and In cross section, The lower end of the first portion is at point A1, The upper end of the first portion is at point B1, a point C1 on the second portion or the third portion, located above the point A1, having the largest dimension with respect to the point A1, and closest to the back plate portion; The dimension h1 of the line segment connecting the point A1 and the point B1, The dimension L1 of the line segment connecting the point A1 and the point C1, The angle α1 formed by the line segment A1B1 and the line segment A1C1, a thickness dimension t1 of the second adhesive portion; the tolerance coefficient K1 of the second adhesive portion; The dimension D1 between the mirror portion and the back plate portion, a dimension d1 from the rear surface of the mirror portion to the rear end of the engagement portion; In this case, When the dimension L1 is equal to or greater than the dimension d1, the following formulas (1) and (2) are satisfied: 5. The mirror unit according to configuration 3 or 4, wherein when dimension L1<d1, the following formula (3) is satisfied. d1≦D1≦L1sin(α1+β1)…(1) β1=arcsin(K1×t1 / h1)…(2) D1=d1…(3) (Configuration 6) The engaged portion is a first portion bonded to the back plate portion by a third adhesive portion; a second portion extending from the first portion toward the mirror portion; a third portion extending upward from the second portion; and and In cross section, The lower end of the first portion is at point A2, The upper end of the first portion is at point B2, a point C2 on the second portion or the third portion, located above the point A2, having the largest dimension with respect to the point A2, and being closest to the mirror portion; The dimension h2 of the line segment connecting the point A2 and the point B2, The dimension L2 of the line segment connecting the point A2 and the point C2, The angle α2 formed by the line segments A2B2 and A2C2 is a thickness dimension t2 of the third adhesive portion; the tolerance coefficient K2 of the third adhesive portion; The dimension D2 between the mirror portion and the back plate portion, Dimension d2 from the back plate portion to the front end of the engaged portion; In this case, The mirror unit according to any one of configurations 3 to 5, wherein the following formulas (4) and (5) are satisfied: d2≦D2≦L2sin(α2+β2)…(4) β2=arcsin(K2×t2 / h2)…(5) (Configuration 7) 7. The mirror unit according to any one of configurations 1 to 6, wherein the fall prevention portion is provided above 50% of the length of the mirror portion in the height direction.

[0128] The above describes embodiments of the present invention. However, the present invention is not limited to these descriptions. Design modifications made by a person skilled in the art to the above-described embodiments are also included within the scope of the present invention as long as they incorporate the features of the present invention. For example, the shape, dimensions, materials, and arrangement of each element of the mirror unit are not limited to those exemplified and can be modified as appropriate. Furthermore, the elements of the above-described embodiments can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they incorporate the features of the present invention. [Explanation of symbols]

[0129] 10 Cabinet 20 Shelf 21 Board part 23 Hinge 30 Mirror unit 40 Back plate 41 Surface 41a Inside part 41b Frame 41b1 Upper part 41b2 Lower part 41b3 Left 41b4 Right side 41c First connection part 41d Second connection part 41e Third connection part 41f 4th connection 42 Back side 43 Hole 47 1st adhesive part 50 Mirror section 50a surface 50b back side 52-sided heater 60 Fall suppression part 61 Engagement part 61a Part 1 61b Part 2 61c 3rd part 63 2nd adhesive part 65 Engaged part 70 Fall suppression part 71 Engaged part 71a Part 1 71b Part 2 71c Part 3 73 3rd adhesive part 80 Fall suppression part 81 Engagement part 81a 1st section 81b Part 2 81c Part 3 83 Engaged part 83a Part 1 83b Part 2 90 Fall suppression part 91 First mounting part 93 Second mounting part 95 String-like member 100 Fall suppression part 110 Main body 115 Other mirror parts 120 Upper Frame 125 Lower Frame 130 Fall suppression part 131 Engagement part 131a Part 1 131b Part 2 131c Part 3 135 Engaged part 135a Part 1 135b Part 2 135c Part 3 150 Fall suppression part 151 Engagement part 152 Part 1 153 Part 2 153a Horizontal part 153b Curved section 154 Part 3 160 Fall suppression part 161 Engagement part 162 Part 1 163 Part 2 164 Part 3 170 Fall suppression part 171 Engagement part 172 Part 1 173 Part 2 174 Part 3 180 Fall suppression part 181 Engagement part 182 Part 1 183 Part 2 183a Horizontal part 183b Curved section 184 Part 3 S1 Storage Space S2 space

Claims

1. A back plate portion and a first adhesive portion adhered to a surface of the back plate portion; a mirror portion facing the back plate portion and bonded to the first adhesive portion; In a mirror unit comprising: A mirror unit characterized by having a fall prevention portion provided between the back plate portion and the mirror portion, which supports the mirror portion when the mirror portion moves downward relative to the back plate portion.

2. The mirror unit according to claim 1 , wherein a part of the fall prevention portion is adhered to the mirror portion by a second adhesive portion.

3. The fall prevention unit is an engagement portion provided on a rear surface of the mirror portion; an engaged portion provided on a surface of the back plate portion, the engaged portion engaging with the engaging portion when the mirror portion moves downward relative to the back plate portion; 3. The mirror unit according to claim 2, further comprising:

4. The surface of the back plate portion is The inner part and a frame portion that protrudes forward from the inner portion and surrounds the periphery of the inner portion; and The mirror unit according to claim 3 , wherein the fall prevention portion is configured so that the engaging portion engages with the engaged portion on the inside of the frame portion when the mirror portion moves downward relative to the back plate portion.

5. The engagement portion is a first portion adhered to the second adhesive portion; a second portion extending from the first portion toward the back plate portion; a third portion extending downward from the second portion; and In cross section, The lower end of the first portion is at point A1, The upper end of the first portion is at point B1, a point C1 on the second portion or the third portion, located above the point A1, having the largest dimension with respect to the point A1, and being closest to the back plate portion; The dimension h1 of the line segment connecting the point A1 and the point B1, The dimension L1 of the line segment connecting the point A1 and the point C1, The angle α1 formed by the line segment A1B1 and the line segment A1C1, a thickness dimension t1 of the second adhesive portion; the tolerance factor K1 of the second adhesive portion; The dimension D1 between the mirror portion and the back plate portion, A dimension d1 from the rear surface of the mirror portion to the rear end of the engagement portion; In this case, When the dimension L1 is equal to or greater than the dimension d1, the following formulas (1) and (2) are satisfied:

4. The mirror unit according to claim 3, wherein when dimension L1<d1, the following formula (3) is satisfied: d1≦D1≦L1sin(α1+β1)…(1) β1=arcsin(K1×t1 / h1)…(2) D1 = d1 ... (3)

6. The engaged portion is a first portion adhered to the back plate portion by a third adhesive portion; a second portion extending from the first portion toward the mirror portion; a third portion extending upward from the second portion; and In cross section, The lower end of the first portion is at point A2, The upper end of the first portion is at point B2, a point C2 on the second portion or the third portion, located above the point A2, having the largest dimension with respect to the point A2, and being closest to the mirror portion; The dimension h2 of the line segment connecting the point A2 and the point B2, The dimension L2 of the line segment connecting the point A2 and the point C2, The angle α2 formed by the line segment A2B2 and the line segment A2C2, a thickness dimension t2 of the third adhesive portion; the tolerance coefficient K2 of the third adhesive portion; The dimension D2 between the mirror portion and the back plate portion, A dimension d2 from the back plate portion to the front end of the engaged portion; In this case, 4. The mirror unit according to claim 3, wherein the following formulas (4) and (5) are satisfied. d2≦D2≦L2sin(α2+β2)…(4) β2=arcsin(K2×t2 / h2)…(5)

7. The mirror unit according to claim 1 , wherein the fall prevention portion is provided above 50% of the length of the mirror portion in the height direction.

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