JP7190169B2 - lamp shade - Google Patents

Description

The technique disclosed by this specification relates to a lampshade used for a lighting fixture.

As an example of conventional lampshades, a lampshade described in Patent Document 1 below is known. The lampshade includes a mounting member having an axial hole for mounting a light source in the center, a plurality of fixing projections at equal intervals on the outer peripheral portion, and a plurality of sheet materials having locking holes for the fixing projections. , is equipped with

The sheet material has insertion protrusions arranged on two diagonally opposite tops, and two slits arranged inside the two tops. Between a pair of adjacent sheet materials, the insertion protrusion of one sheet material is inserted into the slit of the other sheet material, thereby connecting the pair of adjacent sheet materials. By continuously performing this work, the plurality of sheet members are connected in a ring shape. A mounting member is arranged in the center of the plurality of sheet members connected in a ring shape. A plurality of sheets are fixed to the mounting member by inserting the fixing protrusions provided on the mounting member into locking holes provided in the sheet members.

Japanese Patent No. 5873050

For example, when forming a polyhedral lampshade with one triangular surface using a plurality of sheet materials, three sheet materials are combined to form one combined part with a triangular opening inside. It is formed. By connecting these combined parts together, a polyhedral lampshade with one triangular face is formed. However, if the slits are formed in an arrangement orthogonal to the connecting direction of a plurality of combined parts, the shape of the lampshade may collapse due to, for example, the protrusion coming out of the slit due to impact or the like.

In the lampshade disclosed in this specification, a plurality of sheet members are arranged and combined in the circumferential direction to form an annular sheet member aggregate, and the plurality of sheet member aggregates are arranged radially. A lamp shade having a spherical shape as a whole and containing a light source therein, wherein the sheet member comprises a folding line directed toward the light source and a pair of parts arranged on both sides of the folding line. wherein the pair of parts in the unfolded state are arranged point-symmetrically with respect to the midpoint of the folding line, and in the sheet member assembly, the part adjacent to the left side in the circumferential direction of the part is defined as the left part, A part adjacent to the right side in the circumferential direction of the part is defined as a right side part, and the part is provided on a pair of apexes arranged in a direction intersecting the radiation direction of the light source and on a line connecting the pair of apexes. and has an opening extending in a direction perpendicular to the line, the apex of the left part is inserted, and the inserted apex abuts against the edge of the opening to prevent the apex from coming off. and an orthogonal slit portion held by and provided on the opposite side of the folding line with respect to the line, and are opened at an angle to both the line and the orthogonal slit portion, and the vertex portion of the right part is inserted. , and an oblique slit portion that retains the apex portion in a slip-off state by abutting the apex portion that has been passed through the opening edge.

With the above configuration, different sheet member aggregates are connected by a pair of parts. (For example, when connecting by inserting a connecting protrusion provided on one sheet member assembly into a connecting slit provided on the other sheet member assembly), the shape of the lampshade collapses. can be made difficult.

Moreover, the folding line may be configured to be inclined with respect to the line.

Since the folding line is inclined with respect to the line, when the sheet member assembly is combined to form a spherical shape, the sheet member can be formed into a spherical shape without being greatly curved at the position of the folding line.

Further, the length of the folding line may be a length of a ratio of 15% or more and 25% or less of the length between the pair of vertex portions.

The larger the ratio of the length of the folding line to the length between the pair of vertices (for example, when the ratio is 30% or more), the more difficult it is to bend the pair of parts with each other, resulting in lower assembling workability. On the other hand, the smaller the ratio of the length of the folding line to the length between the pair of vertices (for example, when the ratio is 10% or less), the easier it is to bend the pair of parts with each other, but the elasticity of the sheet member increases. becomes weaker, and the power to keep the shape of the lampshade as a whole becomes weaker. Therefore, it is appropriate that the ratio of the length of the folding line to the length between the pair of vertex portions is 15% or more and 25% or less.

According to the lampshade disclosed in this specification, it is possible to prevent the shape of the lampshade from collapsing.

General view of the lampshade in the embodiment Perspective view of sheet member assembly Plan view of sheet member assembly The perspective view which shows the state which combined two sheet|seat member aggregates. A plan view showing a state in which two sheet member aggregates are combined. Illustration of the sheet members in an unfolded state Enlarged view of the vertex and the vicinity of the orthogonal slit in FIG. Diagram showing the process of creating a sheet member assembly Diagram showing the process of creating a sheet member assembly Diagram showing the process of creating a sheet member assembly

<Embodiment>
This embodiment will be described with reference to FIGS. 1 to 10. FIG. As shown in FIG. 1, the lampshade 10 of this embodiment moderates light from a light source 12 (for example, an incandescent lamp), and is composed of a plurality of sheet member aggregates 14. As shown in FIG. A plurality of sheet member aggregates 14 are radially arranged, and the lampshade 10 as a whole forms a spherical floral pattern. The light source 12 is housed inside the lampshade 10 .

As shown in FIGS. 2 and 3, the sheet member aggregate 14 is formed by bending three sheet members 16 and combining them into an annular shape. Each sheet member 16 is folded at a folding line 18 directed toward the light source 12 . A sheet having translucency and elasticity is used for the sheet member 16, and for example, a PP sheet (polypropylene sheet) having a thickness of about 0.38 mm can be used. As shown in FIG. 1, the lampshade 10 is constructed by combining sheet members 16 of two colors (milky white and pink).

The sheet member 16 is composed of a pair of parts 20 as shown in FIG. The pair of parts 20 are located on both sides of the folding line 18 and arranged point-symmetrically with respect to the midpoint 18A of the folding line 18 . The folding line 18 is inclined with respect to the horizontal line HL in the unfolded state, and the inclination angle of the folding line 18 with respect to the horizontal line HL is A1.

As shown in FIG. 6, the part 20 includes a rhombus-shaped part body 22 and a pair of vertex portions 24 provided at the vertexes of the part body 22 in the horizontal direction. A rhombus does not mean a rhombus in a geometrically strict sense, but has a width within a range in which the lampshade 10 can be assembled. As shown in FIG. 3, the pair of vertex portions 24 are arranged in a direction intersecting with the radiation direction D1 of the light source 12 (the direction from the back side to the front side of the paper surface in FIG. 3). The part main body 22 is provided with an orthogonal slit portion 26 and an oblique slit portion 28, respectively.

As shown in FIG. 6, the length L1 of the orthogonal slit portion 26 is the same as the length L2 of the oblique slit portion 28. As shown in FIG. The orthogonal slit portion 26 is provided on the horizontal line HL connecting the pair of vertex portions 24 and extends in a direction orthogonal to the horizontal line HL. On the other hand, the oblique slit portion 28 is inclined with respect to both the horizontal line HL and the orthogonal slit portion 26, and the inclination angle of the oblique slit portion 28 with respect to the horizontal line HL is A2.

The vertex 24 is heart-shaped as shown in FIG. In the description below, as shown in FIG. The maximum length in the linear direction will be described as L5.

The length L1 of the orthogonal slit portion 26 and the length L2 of the oblique slit portion 28 are the same length as the length L3 at the vertex portion 24 and longer than the length L5 at the vertex portion 24. is shorter than the length L4 in . The same length does not mean the same length in the strict sense, but means having a width within a range where the lampshade 10 can be assembled, and the same applies hereinafter.

As shown in FIGS. 2 and 3, each part 20 of the three sheet members 16 constituting the sheet member aggregate 14 has a pair of vertex portions 24 formed by an orthogonal slit portion 26 and an oblique slit portion of the parts 20 adjacent to each other. 28 and are connected to each other. Here, when one vertex portion 24 is inserted through the orthogonal slit portion 26, the length L1 of the orthogonal slit portion 26 and the length L2 of the oblique slit portion 28 are the same as the length L5 of the vertex portion 24. Therefore, the part 20 is bent and inserted so that the side edge of the vertex 24 is parallel to the orthogonal slit 26 . When the vertex portion 24 of the part 20 is inserted through the orthogonal slit portion 26, the curved part 20 tries to restore itself. Here, since the length L4 of the apex 24 is longer than the length L1 of the orthogonal slit 26, the apex 24 of the part 20 abuts the opening edge of the orthogonal slit 26 of the adjacent part 20. As a result, the part 20 is retained by the adjacent part 20 in a state of being retained. The other vertex portion 24 is similarly inserted through the oblique slit portion 28 of the adjacent part 20 .

As shown in FIG. 6, the oblique slit portion 28 is provided on the opposite side of the folding line 18 with respect to the horizontal line HL connecting the pair of vertex portions 24 . As a result, as shown in FIG. 3, each part 20 of the three sheet members 16 constituting the sheet member assembly 14 is tilted with respect to the central axis extending in the radiation direction D1 of the light source 12, and the sheet member assembly The appearance of 14 has a shape that opens toward the radiation direction D1 of the light source 12, forming one small flower in the entire lampshade 10. As shown in FIG.

The angle A2 of the oblique slit portion 28 is set to an angle of less than 75±5 degrees. By setting the angle A2 in this way, the apex 24 inserted through the oblique slit 28 in the sheet member assembly 14 reliably hits the opening edge of the oblique slit 28, and the apex 24 reaches the oblique slit. 28 can be suppressed. When the angle A2 of the oblique slit portion 28 is greater than 80 degrees (for example, when the angle A2 of the oblique slit portion 28 is 90 degrees, which is the same as that of the orthogonal slit portion 26), the vertex portion 24 is inclined with respect to the oblique slit portion 28. As a result, the vertex portion 24 can be easily pulled out of the oblique slit portion 28 . On the other hand, if the angle A2 of the oblique slit portion 28 is less than 70, the apex portion 24 cannot be inserted through the oblique slit portion 28 unless the part 20 is largely curved, resulting in poor assembly workability. The appropriate size of the angle A2 varies depending on the number of sheet members 16 forming the sheet member assembly 14. FIG.

An example of the procedure for combining the sheet members 16 in the process of forming the sheet member aggregate 14 is performed as follows. Here, regarding the three sheet members 16 constituting the sheet member assembly 14, as shown in FIGS. 2 and 3, one sheet member 16 of the three sheet members 16 is defined as a central sheet member 16A, The sheet member 16 adjacent to the left side in the circumferential direction of the central sheet member 16A is defined as the left side sheet member 16B, and the sheet member 16 adjacent to the right side in the circumferential direction to the central sheet member 16 is defined as the right side sheet member 16C. Similarly, the parts 20 of the seat members 16A are the center part 20A, the parts 20 of the left seat member 16B are the left parts 20B, and the parts 20 of the right seat member 16C are the right parts. 20C. Further, regarding the surface of the part body 22 of each sheet member 16, the surface located outside the three annularly combined part members 20 (the central part member 20A, the left part member 20B, and the right part member 20C) is called an outer surface 22A. defined, and the surface located inside is defined as an inner surface 22B. Regarding the pair of vertex portions 24, the left vertex portion 24 is defined as a left vertex portion 24A, and the right vertex portion 24 is defined as a right vertex portion 24B.

First, as shown in FIG. 8, the right vertex portion 24B of the central part 20A is inserted through the orthogonal slit portion 26 of the right part 20C from the inner surface 22B side of the right part 20C while bending the central part 20A. Similarly, the right vertex portion 24B of the right part 20C is inserted through the orthogonal slit portion 26 of the left part 20B from the inner surface 22B side of the left part 20B while bending the right part 20B. Similarly, as shown in FIGS. 8 and 9, the right vertex portion 24B of the left part 20B is inserted into the orthogonal slit portion 26 of the central part 20A from the inner surface 22B side of the central part 20A while bending the left part 20B. be done.

Next, as shown in FIGS. 9 and 10, the left vertex portion 24A of the right part 20C is inserted into the oblique slit portion 28 of the central part 20A from the outer surface 22A side of the central part 20A while bending the right part 20C. be done. Similarly, the left vertex portion 24A of the left part 20B is inserted through the oblique slit portion 28 of the right part 20C from the outer surface 22A side of the right part 20C while bending the left part 20B. Similarly, the left vertex portion 24A of the central part 20A is inserted through the oblique slit portion 28 of the right part 20C from the outer surface 22A side of the right part 20C while bending the central part 20C. Thereby, the sheet member assembly 14 shown in FIG. 2 is formed. The procedure for combining the sheet members 16 in the process of forming the sheet member assembly 14 is not limited to the above procedure, and may be a procedure different from the above procedure.

4 and 5, of the pair of left parts 20B of the left sheet member 16B, the left part 20B that is not used in the sheet member assembly 14 is also combined with the sheet members 16D and 16E. As a result, the sheet member assembly 140 is formed. As a result, the sheet member assembly 14 and the sheet member assembly 140 are connected to each other. By connecting a plurality of sheet member aggregates 14 and 140 to each other in this manner, the spherical lampshade 10 shown in FIG. 1 is formed.

As shown in FIG. 6, the folding line 18 is inclined at an angle A1 with respect to the horizontal line HL. can be formed into a spherical shape without being greatly curved. At this time, the angle A1 is set within a range of 8 degrees or more and 13 degrees or less. Moreover, the length L6 of the folding line 18 is set at a ratio of 15% or more and 25% or less to the length L7 between the pair of vertex portions 24 . In general, the larger the ratio of the length L6 of the folding line 18 to the length L7 between the pair of vertex portions 24 (for example, when the ratio is 30% or more), the more difficult it becomes to bend the pair of parts 20 to each other. , the assembly workability is lowered. On the other hand, the smaller the ratio of the length L6 of the folding line 18 to the length L7 between the pair of vertex portions 24 (for example, when the ratio is 10% or less), the easier it is to bend the pair of parts 20 with each other. , the elasticity of the sheet member 16 is weakened, and the force for maintaining the shape of the lamp shade 10 as a whole is weakened. Therefore, it is appropriate that the ratio of the length L6 of the folding line 18 to the length L7 between the pair of vertex portions 24 is 15% or more and 25% or less.

As described above, according to the present embodiment, the different sheet member aggregates 14 are connected by the pair of parts 20. Therefore, as in the conventional art, the sheet member aggregates are individually provided. Compared to the case of connecting by a connecting portion (for example, connecting by inserting a connecting projection provided in one sheet member assembly into a connecting slit provided in the other sheet member assembly), The shape of the lamp shade 10 can be made difficult to collapse.

Also, the folding line 18 may be inclined with respect to the horizontal line (line) HL.

Since the folding line 18 is inclined with respect to the horizontal line (line) HL, when the sheet member assembly 14 is combined to form a spherical shape, the sheet member 16 is not greatly curved at the folding line 18 position. It can be formed spherically.

Further, the length of the folding line may be a length of a ratio of 15% or more and 25% or less of the length between the pair of vertex portions.

The larger the ratio of the length L6 of the folding line 18 to the length L7 between the pair of vertex portions 24 (for example, when the ratio is 30% or more), the more difficult it becomes to bend the pair of parts 20 to each other, resulting in improved assembly workability. decreases. On the other hand, the smaller the ratio of the length L6 of the folding line 18 to the length L7 between the pair of vertex portions 24 (for example, when the ratio is 10% or less), the easier it is to bend the pair of parts 20 with each other. , the elasticity of the sheet member 16 is weakened, and the force for maintaining the shape of the lamp shade 10 as a whole is weakened. Therefore, it is appropriate that the ratio of the length L6 of the folding line 18 to the length L7 between the pair of vertex portions 24 is 15% or more and 25% or less.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiments described by the above description and drawings, and includes, for example, the following various aspects.
(1) In the above embodiment, the sheet member assembly 14 is composed of three sheet members 16, but may be composed of, for example, four sheet members or five sheet members. can be A lampshade is formed by combining a sheet member assembly composed of three sheet members, a sheet member assembly composed of four sheet members, and a sheet member assembly composed of five sheet members. Also good. Further, the angle A2 of the oblique slit portion may be appropriately changed according to the number of sheet members forming the sheet member assembly.
(2) In the above embodiment, the light source 12 is an incandescent lamp, but it can also be applied to LED lamps, halogen lamps, and fluorescent lamps.
(3) The sheet member 16 has two colors, milky white and pink. sheet member may be added to the configuration.

10: Lampshade 12: Light source 14, 140: Sheet member assembly 16, 16D, 16E: Sheet member 18: Folding line 18A: Middle point 20: Part 20B: Left part 20C: Right part 24: Vertex 26: Orthogonal slit Part 28: Diagonal slit part D1: Radial direction HL: Horizontal line (line)
L6: length

Claims (3)

A plurality of sheet members are arranged and combined in a circumferential direction to form an annular sheet member assembly, and the plurality of sheet member assemblies are radially arranged to form a spherical shape as a whole, and a light source is provided inside. A lampshade to be housed,
The sheet member includes a fold line directed toward the light source and a pair of parts arranged on both sides of the fold line, and the pair of parts in the unfolded state are symmetrical with respect to the midpoint of the fold line. is located in
In the sheet member assembly, a part adjacent to the left side in the circumferential direction of the part is defined as a left side part, and a part adjacent to the right side in the circumferential direction of the part is defined as a right side part,
The parts are
a pair of vertex portions arranged in a direction intersecting with the radiation direction of the light source;
It is provided on a line connecting the pair of apexes and has an opening extending in a direction perpendicular to the line, the apex of the left part is inserted through, and the inserted apex is an opening edge. An orthogonal slit portion that holds the vertex portion in a retaining state by abutting on,
It is provided on the opposite side of the folding line with respect to the line, and is inclined with respect to both the line and the orthogonal slit portion, and the vertex portion of the right side part is inserted, and the inserted vertex portion is and an oblique slit portion that holds the vertex portion in a retaining state by coming into contact with the edge of the opening. 2. The lampshade according to claim 1, wherein said folding line is slanted with respect to said line. 3. The lampshade according to claim 1, wherein the length of said folding line is a length of a ratio of 15% or more and 25% or less of the length between said pair of vertex portions.

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