JP2008300226A - Method of manufacturing light guide body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a light guide body capable of reducing the manufacturing cost of the light guide body. <P>SOLUTION: In the manufacturing method of the light guide body, a molding die 2 is fabricated by holding a plurality of processing pins 11 by a processing pin embedding jig 12 with the tip of the pins 11 arranged in a row on the same plane, and a light guide body material 101A is fixed by a light guide fixing jig 3 with the light guide body material 101A in bent state. Thereafter, the tips of the processing pins 11 heated are pressed on the light guide body material 101A, and the recesses 104<SB>n</SB>having reflecting surfaces 105<SB>n</SB>are molded and a linear light guide body 101 is manufactured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a light guide having a plurality of recesses having a reflective surface.

  Conventionally, light guide illumination used for a liquid crystal backlight or the like is known. Such light guide illumination includes a light guide and a light source provided on at least one end face of the light guide. The light guide is formed with a reflection portion for reflecting light from the light source to the other surface facing the light guide. In the light guide illumination described above, light from a light source provided on the end face of the light guide is reflected by the reflecting portion while being guided through the light guide, and is irradiated from the other surface of the light guide. As a method for forming the reflection portion of the light guide used for such light guide illumination, there are methods such as white printing, surface roughening by etching, etc., laser, cutting, mold formation, etc. Can be mentioned. Among these, it is known that a method of forming a V-groove-shaped recess by molding is the most reflective method, and is used for the liquid crystal backlight of a mobile phone as described above.

  However, in such a light guide illumination, since the amount of light reaching the reflection portion far from the light source is less than the amount of light reaching the near reflection portion, the luminance varies depending on the distance from the light source when the same reflection portion is formed periodically. There was a problem. Therefore, techniques for solving this problem have been proposed.

  In Patent Document 1, the side surface of the rod-shaped light guide is inclined with respect to the central axis so that the light guide is thinned from one end surface to the other end surface, and a reflective portion is provided on the side surface. Light guide illumination in which transverse grooves (concave portions) are formed is disclosed. In this light guide illumination, a light source is provided on the end face on the thick side of the light guide. Thereby, since the transverse groove closer to the light source is farther from the central axis, light blocked by the transverse groove closer to the light source can be suppressed. Thereby, the distribution of the reflected light quantity in the length direction of the light guide can be made uniform to some extent. However, since the light guide has a tapered shape, the cross-sectional area of the light guide decreases as the distance from the light source increases. That is, since the area where light can be guided decreases as the distance from the light source decreases, there is a problem that it is difficult to further uniform the amount of light emitted from the light guide.

Therefore, as another method for uniformizing the amount of light, the concave portion having the reflecting portion of the light guide according to the distance from the light source while having substantially the same cross-sectional area of the light guide regardless of the distance from the light source. It is conceivable to change the depth or the pitch between the recesses. For example, the depth of the concave portion can be changed by molding the light guide material with a molding die in which the height of the convex portion for molding each concave portion is changed. The pitch of the concave portions can be changed by molding the light guide material with a molding die in which the pitch between the convex portions is changed.
JP 2002-352603 A

  However, as described above, the technology for producing the light guide by changing the height and pitch of the convex part of the molding die for molding the concave part produces a molding die with slightly different convex part shape and arrangement. However, it takes time to manufacture such dies in a batch by machining, and if the size of the light guide changes, it is necessary to manufacture a completely new dies. There is a problem that the manufacturing cost of the metal mold increases, and as a result, the manufacturing cost of the light guide increases.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method of manufacturing a light guide that can reduce the manufacturing cost of the light guide.

  The invention according to claim 1 is a method of manufacturing a light guide having a plurality of concave portions each having a reflection surface that reflects light from a light source provided on an end surface. Forming a mold for molding by holding it on the processing pin holder, bending the light guide material and fixing the light guide material, and processing the light guide material And a molding step of molding the recess by pushing the tip of a pin.

  The invention according to claim 2 is the method of manufacturing the light guide according to claim 1, wherein the molding step is performed by connecting the plurality of processing pin holders.

  According to a third aspect of the present invention, in the light guide material fixing step, the light guide material is bent and fixed by a holding jig extending in a length direction. It is a manufacturing method of the light guide described.

  The invention according to claim 4 is characterized in that, in the molding step, the light guide material or the processed pin is heated to a temperature equal to or higher than a softening point temperature of the light guide material. The method of manufacturing a light guide according to any one of the above.

  The invention according to claim 5 is characterized in that, in the molding die manufacturing step, a plurality of processing pins having the same shape are arranged at the same interval. It is a manufacturing method of a light body.

  According to the present invention, in a state where the light guide material is bent, a plurality of concave portions with different depths having reflection areas of different areas can be formed by pushing processing pins having tips aligned on the same plane. It is molded into. Thereby, the area of a reflective surface and the depth of a recessed part can be changed with the same shaping | molding type | mold by the bending method of light guide material. For this reason, a light guide that controls the area of the reflecting surface and the depth of the concave portion by manufacturing the mold in a lump by machining, and by manufacturing a completely new mold when the size of the light guide changes. Compared with this manufacturing method, the mold for molding can be easily manufactured and the manufacturing cost can be reduced. Thereby, the manufacturing cost of a light guide can be reduced.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  First, a linear illumination device using a linear light guide manufactured by the manufacturing method of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of a linear illumination device including a linear light guide. 2 is a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 1 and 2, the linear illumination device 100 includes a linear light guide 101, a light source 102, and a control unit 103.

The linear light guide 101 is made of a colorless and transparent acrylic resin that can transmit light while guiding light. For example, the linear light guide 101 is formed in a quadrangular prism shape having a width WL of about 5 mm and a height HL of about 5 mm. On the molding surface 101b of the linear light guide 101, a plurality of dot-shaped and V-groove-shaped concave portions 104 _n (n = 1, 2,...) Are formed. Here, the depth of the recess 104 _n is configured to be deeper as the recess 104 _{n is} further away from the light source 102.

One surface of the recess 104 _n is formed with a reflective surface 105 _{n that} is rectangular and planar in plan view. The reflection surface 105 _n is for reflecting the light L from the light source 102 to the irradiation surface 101 a of the linear light guide 101. All the reflection surfaces 105 _n are configured to be inclined at substantially the same inclination angle α with respect to the molding surface 101 b of the linear light guide 101. Here, the inclination angle α of the reflection surface 105 _n with respect to the molding surface 101 b of the linear light guide 101 is, for example, 45 ° to 60 °, preferably 50 so that a large amount of light can be reflected toward the irradiation surface 101 a. It is formed at a degree of 55 °. The surface of the reflective surface 105 _n, in order to align the direction of light reflected by the reflecting surface 105 _n, smooth plane is desirable. Here, the area of the reflecting surface 105 _n, the more reflective surfaces 105 _n away from the light source 102 is configured to be larger.

  The light source 102 is provided on one end surface 101c of the linear light guide 101 and includes a light emitting diode (not shown). The color of light emitted from the light emitting diode is not particularly limited, and blue, green, red, or a plurality of colors may be combined. The control unit 103 is electrically connected to the light source 102 and controls a light emitting diode provided in the light source 102.

In the linear illumination device 100, the light L emitted from the light source 102 guides the inside of the linear light guide 101, and the light L reaching the reflection surface 105 _n of the recess 104 _n is converted into the linear light guide. 101 is reflected to the irradiation surface 101a. Thereby, a bright spot of the light L is formed at a position where the concave portion 104 _n is formed, and functions as illumination by the plurality of bright spots. Here, the linear illumination device 100 is configured such that the depth of the recess 104 _n increases as the distance from the light source 102 increases, and the area of the reflective surface 105 _n increases as the distance from the light source 102 increases. The amount of light blocked by the recess 104 _n close to 102 can be reduced, and light can be sufficiently delivered to a region far from the light source 102. Thus, it is possible to substantially equalize the amount of light reflected by the reflecting surfaces 105 _n, across the length direction of the linear illumination device 100, it is possible to substantially equalize the amount of light irradiated.

  Next, the manufacturing apparatus of the light guide used for the manufacturing method of the linear light guide by 1st Embodiment of this invention is demonstrated. FIG. 3 is a cross-sectional view of the light guide manufacturing apparatus according to the first embodiment. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a perspective view of a molding die. FIG. 6 is a perspective view of the processing pin and the processing pin embedding jig. FIG. 7 is a schematic view of a processing pin. FIG. 8 is a cross-sectional view of the processing pin height adjusting jig. In addition, let the up-and-down direction shown by the arrow of FIG.

  As shown in FIGS. 3 to 8, the light guide manufacturing apparatus 1 includes a molding die 2, a light guide fixing jig 3, and a processing pin height adjusting jig 4.

  As shown in FIGS. 3 to 6, the molding die 2 includes a processing pin 11 and a processing pin embedding jig (corresponding to a processing pin holder described in claims) 12.

The processing pin 11 is for molding the recess 104 _n of the linear light guide 101. All the processing pins 11 are formed in the same shape. The processing pin 11 is formed in a quadrangular prism shape. A triangular prism portion 11 a corresponding to the recess 104 _n is formed at the tip of the processing pin 11. The triangular prism portion 11a, and a planar inclined surface 11b at an oblique rectangular shape is formed to mold the reflecting surface 105 _n with respect to the central axis of the quadrangular prism portion. The surface of the processing pin 11, particularly the inclined surface 11b, is preferably a mirror surface. The shape of the processing pin 11 is not particularly limited. For example, as shown in FIG. 7, the length La is 23.6 mm, the width W is 2 mm, the thickness D is 1 mm, and the apex angle β is 40 °. It is possible to do.

  The processing pin embedding jig 12 is configured to be able to hold a plurality of processing pins 11 perpendicular to the upper surface. The processing pin embedding jig 12 is formed with a plurality of square columnar pin holes 12a in which the processing pins 11 are embedded. The plurality of pin holes 12a are arranged at the same interval. Thereby, the processing pin 11 is hold | maintained in the state arrange | positioned by the processing pin embedding jig | tool 12 at the same space | interval. Although the material which comprises the processing pin embedding jig | tool 12 is not specifically limited, Stainless steel with high heat resistance is used so that the position adjustment of the processing pin 11 can be easily performed and the heat at the time of molding can be endured. Etc. are preferred. A plurality of processing pin embedding jigs 12 are connected and used in accordance with the length of the linear light guide 101 to be molded. The processing pin 11 is fixed to the processing pin embedding jig 12 by aligning the height of the tip, mechanically such as screwing, or by adhesion or welding.

  As shown in FIGS. 3 and 4, the light guide fixing jig 3 includes a lower light guide pressing jig 15, upper light guide pressing jigs 16 and 17, and fixing jigs 18 and 19. ing.

Lower light guide holding jig 15, at the time of molding the recess 104 _n, is for fixing by pressing the linear light conductor 101 or the light guide material 101A from the irradiation surface 101a side. The upper surface 15a of the lower light guide pressing jig 15 is configured to have the same curved surface shape as the curved surfaces of the lower surfaces 16a and 17a of the upper light guide pressing jigs 16 and 17.

A pair of upper light guide holding jig 16 and 17, when molding the recess 104 _n, is for fixing by pressing the linear light conductor 101 or the light guide material 101A from the molding surface 101b. The pair of upper light guide pressing jigs 16 and 17 are arranged on the molding surface 101 b of the light guide material 101 </ b> A with an interval equal to or larger than the width of the processing pin 11. The upper surfaces of the upper light guide pressing jigs 16 and 17 are flat. Therefore, the curved surface shape of the lower surfaces 16a and 17a of the upper light guide pressing jigs 16 and 17 corresponds to the change in the distance (= thickness) between the upper surface and the lower surfaces 16a and 17a of the upper light guide pressing jigs 16 and 17. , determines the pushing amount of the working pin 11 when the working pin 11 is pushed in (the depth of the recess 104 _n). By appropriately designing the shape of the upper light guide holding jig 16, 17 can be substantially uniform the amount of light reflected by the reflecting surfaces 105 _n. Further, since the linear light guide 101 processed by bending is straightened after processing, the inclination angle α of each reflecting surface 105 _n is strictly different depending on the angle when bent. . However, the change amount of the inclination angle α is usually small, and the influence on the overall optical performance is negligible.

  The pair of fixing jigs 18 and 19 are for fixing the lower light guide pressing jig 15 and the upper light guide pressing jigs 16 and 17 together with the linear light guide 101 or the light guide material 101A. Is. The pair of fixing jigs 18, 19 fix the holding jigs 15, 16, 17 in a state where the upper portions are arranged with an interval larger than the width of the processing pin 11. Thereby, the light guide material 101 </ b> A is fixed by the light guide fixing jig 3 with the molding surface 101 b exposed beyond the width of the processing pin 11.

  As shown in FIG. 8, the processing pin height adjustment jig 4 adjusts the height of the processing pin 11 embedded in the pin hole 12 a of the processing pin embedding jig 12, and positions the tip of the processing pin 11. It is for aligning. The processing pin height adjustment jig 4 includes a placement portion 4a and an adjustment surface 4b. Thereby, when the processing pin embedding jig 12 in which the processing pin 11 is embedded is placed on the mounting portion 4a of the processing pin height adjustment jig 4, the height of the processing pin 11 is adjusted by the adjustment surface 4b. The tips of the processing pins 11 are aligned on the same plane.

  Next, the manufacturing method of the linear light guide 101 by the light guide manufacturing apparatus 1 described above will be described with reference to the drawings. 9 to 11 are schematic cross-sectional views in each manufacturing process. 10 is a cross-sectional view taken along the line CC in FIG.

  First, as shown in FIG. 8, a plurality of processing pins 11 having the same shape are embedded in a pin hole 12a of a processing pin embedding jig 12 formed at the same interval. Then, after aligning the tips of the processing pins 11 with the processing pin height adjustment jig 4, the processing pins 11 are fixed to the processing pin embedding jig 12. Thereafter, as shown in FIG. 3, a plurality of processing pin embedding jigs 12 are connected in accordance with the length of the linear light guide 101.

  Next, as shown in FIGS. 3 and 4, the rectangular columnar light guide material 101 </ b> A made of acrylic resin is fixed by the light guide fixing jig 3. Here, since the upper surface 15a of the lower light guide pressing jig 15 and the lower surfaces 16a and 17a of the upper light guide pressing jigs 16 and 17 are formed in curved surfaces, the light guide material 101A is bent. It is fixed in the state.

Next, as shown in FIGS. 9 and 10, the light guide body in which the processed pin 11 heated to the softening point temperature or higher (for example, about 200 ° C.) of the light guide material 101A is fixed in a bent state. Press against material 101A. Here, the processing pin 11 is moved directly below, that is, in the extending direction of the processing pin 11. Thus, the light guide material 101A by working pin 11 which is heated is softened, a portion of the tip of the triangular prism portion 11a of the working pin 11 is pushed, the recess 104 _n is molded. Here, since the light guide material 101A is fixed in a bent state, the length of the processing pin 11 pushed into the light guide material 101A becomes longer in the direction of arrow E.

  Next, as shown in FIG. 11, after the processing pin 11 is removed from the light guide material 101A, it is cooled until the light guide material 101A is cured. Thereafter, the linear light guide 101 is completed by removing the light guide material 101A from the light guide fixture 3.

As described above, in the method of manufacturing the light guide according to the first embodiment, the reflecting surface 105 having a different area is obtained by pushing the processing pin 11 whose tip is aligned on a plane in a state where the light guide material 101A is bent. _A plurality of recesses 104 _n having different depths having _n are formed. Thus, even with the same mold 2 can control the depth of the area and the recess 104 _n of the reflecting surface 105 _n by flexing of the light guide material 101A. For this reason, a light guide that controls the area of the reflecting surface and the depth of the concave portion by manufacturing the mold in a lump by machining, and by manufacturing a completely new mold when the size of the light guide changes. Compared with this manufacturing method, the molding die 2 can be easily manufactured and the manufacturing cost can be reduced. Thereby, the manufacturing cost of the linear light guide 101 can be reduced.

  In addition, by forming the molding die 2 by arranging a plurality of processing pin embedding jigs 12, it is possible to easily cope with a change in the length of the linear light guide 101.

    Further, even if the linear light guides 101 have different sizes, only the light guide fixing jig 3 or only the light guide fixing jig 3 and the processing pin embedding jig 12 may be changed. Therefore, the manufacturing cost of the linear light guide 101 can be suppressed.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and description is abbreviate | omitted.

  First, the linear illuminating device using the linear light guide manufactured by the manufacturing method of this embodiment is demonstrated with reference to FIG. FIG. 12 is a perspective view of a linear illumination device including a linear light guide according to the second embodiment.

  As illustrated in FIG. 12, the linear illumination device 100 </ b> A includes a linear light guide 111, a light source 102, and a control unit 103.

The linear light conductor 111, a plurality of recesses 114 _n are formed. A reflective surface 115 _n is formed in the recess 114 _n . Here, the inclination angle α of the reflecting surface 115 _n with respect to the molding surface 111 b of the linear light guide 111 is, for example, 45 ° to 60 °, preferably 50 so that a large amount of light can be reflected toward the irradiation surface 111 a side. It is formed at a degree of 55 °. Here, in the second embodiment, the surface facing the reflective surface 115 _n is inclined with respect to the molding surface 111 b of the linear light guide 111.

  Next, a light guide manufacturing apparatus used in the method of manufacturing a linear light guide according to the second embodiment, which is a part of the first embodiment, will be described. FIG. 13 is a cross-sectional view of the light guide manufacturing apparatus according to the second embodiment. FIG. 14 is a perspective view of a molding die. FIG. 15 is a perspective view of a processing pin and a processing pin embedding jig. FIG. 16 is a schematic view of a processing pin.

  As shown in FIGS. 13 to 15, the light guide manufacturing apparatus 1 </ b> A includes a molding die 2 </ b> A, a light guide fixing jig 3, and a processing pin height adjusting jig (not shown). .

  As shown in FIGS. 13 to 16, the molding die 2 </ b> A includes a processing pin 11 </ b> A and a processing pin embedding jig 12 </ b> A.

Working pin 11A is for molding the recesses 114 _n of the linear light conductor 111. The processing pin 11 is formed in a quadrangular prism shape. The distal end of the working pin 11A, are formed triangular prism portion 11Aa corresponding to the recess 114 _n of an isosceles triangle when viewed from the side. On the upper surface of the triangular prism portion 11Aa (the surface opposite to the working pin embedded jig 12A side), the inclined surface 11Ab for molding the reflecting surface 115 _n are formed. The shape of the processing pin 11 is not particularly limited. For example, as shown in FIG. 16, the length La is 23.6 mm, the width W is 0.71 mm, and the length Lb of the triangular prism portion 11Aa is 1. It is conceivable to set the apex angle β to 32 mm and 30 °.

  The processing pin embedding jig 12 </ b> A is configured to be able to hold a plurality of processing pins 11 while being inclined at a predetermined angle.

When the linear light guide 111 is manufactured by the light guide manufacturing apparatus 1A according to the second embodiment, the molding die 2A is moved in a direction in which the processing pin 11A extends, that is, in a direction slightly inclined from the vertical direction. Thus, pushing the triangular prism portion 11Aa of the heated working pin 11A to the light guide material 101A, to produce a linear light conductor 111 by molding recess 114 _n.

(Third embodiment)
Next, modified examples of the processing pins will be described with reference to the drawings. 17 and 18 are perspective views of modified examples of the processing pins.

  You may form in a column shape like the processing pin 11B shown in FIG. An inclined portion 11Ba having an inclined surface 11Bb inclined with respect to the central axis of the cylinder is formed at the upper end portion of the processing pin 11B. A concave portion of the linear light guide is formed by the inclined portion 11Ba. Moreover, you may form in a cone shape like the processing pin 11C shown in FIG. An inclined portion 11Ca having an inclined surface 11Cb inclined with respect to the central axis of the cone is formed at the upper end portion of the processing pin 11C. A concave portion of the linear light guide is formed by the inclined portion 11Ca.

  In addition, the shape of the processing pin mentioned above is an example, and you may form in prismatic shape other than a square prism, or a pyramid shape.

(Fourth embodiment)
Next, a modified example of the lower light guide pressing jig will be described with reference to the drawings. FIG. 19 is a cross-sectional view of the light guide manufacturing apparatus according to the fourth embodiment.

  As shown in FIG. 19, the lower light guide pressing jig 35 may be composed of a plurality of rod-shaped members having different lengths. In this case, the light guide material 101 </ b> A is pressed from the lower surface to the upper light guide pressing jigs 16 and 17 by the plurality of lower light guide pressing jigs 35. By configuring the lower light guide pressing jig 35 in this manner, even if the size (length) of the light guide material 101A is changed, the same light guide pressing jig 35 can be used. Moreover, you may press a lower light guide material not with a rod-shaped member but with several springs. Furthermore, any shape and state may be used as long as the light guide material does not move when the processing pin is pushed in.

  As mentioned above, although this invention was demonstrated in detail using embodiment, this invention is not limited to embodiment described in this specification. The scope of the present invention is determined by the description of the claims and the scope equivalent to the description of the claims. Hereinafter, modified embodiments in which the above-described embodiment is partially modified will be described.

  For example, although the linear light guide has been described in the above-described embodiment, a light guide having another shape such as a planar shape may be manufactured by the above-described method for manufacturing a light guide.

  Moreover, the material which comprises a light guide is not limited to an acrylic resin, It can change suitably to synthetic resins, such as a polycarbonate resin, a silicone resin, a cyclopolyolefin resin, a glass plate.

  Further, the number of processing pins and processing pin embedding jigs can be changed as appropriate according to the desired shape of the light guide. Similarly, the method of bending the light guide material by the light guide fixing jig can be appropriately changed according to the desired shape of the light guide. Furthermore, the material constituting the machining pin and the machining pin embedding jig can be changed as appropriate.

  Moreover, the shape of the front-end | tip part of a process pin is not limited to a triangular prism shape, It can change suitably according to the shape of the reflective surface of a light guide. Note that the shape of the reflecting surface is not limited to a planar shape, and may be formed to have a curved surface.

  Moreover, in the above-mentioned embodiment, although the processing pin was heated, you may push a processing pin into a light guide material in the state which heated and softened the light guide material. In this case, after the processing pin is pushed into the light guide material, the processing pin is pulled out, the light guide material is removed from the holding jig, and then the light guide material is cooled.

It is a perspective view of the linear illuminating device containing the linear light guide by 1st Embodiment. It is sectional drawing along the AA line in FIG. It is sectional drawing of the manufacturing apparatus of the light guide by 1st Embodiment. It is sectional drawing along the BB line in FIG. It is a perspective view of the type | mold for shaping | molding. It is a perspective view of a processing pin and a processing pin embedding jig. It is the schematic of a process pin. It is sectional drawing of a process pin height adjustment jig. It is a schematic sectional drawing in each manufacturing process. It is a schematic sectional drawing in each manufacturing process. It is a schematic sectional drawing in each manufacturing process. It is a perspective view of the linear illuminating device containing the linear light guide by 2nd Embodiment. It is sectional drawing of the manufacturing apparatus of the light guide by 2nd Embodiment. It is a perspective view of the type | mold for shaping | molding. It is a perspective view of a processing pin and a processing pin embedding jig. It is the schematic of a process pin. It is a perspective view of the modification of a processing pin. It is a perspective view of the modification of a processing pin. It is sectional drawing of the manufacturing apparatus of the light guide by 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Light-guide manufacturing apparatus 2, 2A Mold 3 Light-guide fixing jig 4 Processing pin height adjustment jig 4a Mounting part 4b Adjustment surface 11, 11A, 11B, 11C Processing pin 11a, 11Aa, 11Ba, 11Ca Triangular prism portion 11b, 11Ab, 11Bc, 11Cc Inclined surface 12, 12A Processing pin embedding jig 15 Lower light guide pressing jig 15a Upper surface 16, 17 Upper light guide pressing jig 16a, 17a Lower surface 18, 19 Fixed jig 100,100A linear illumination device 101, 111 linear light guide 101a, 111a irradiated surface 101b, 111b molding surface 101c end surface 101A light guide material 102 light source 103 controller ₁₀₄ n, 114 _n recesses ₁₀₅ n, 115 _n reflective surface

Claims (5)

In the method of manufacturing a light guide having a plurality of recesses having a reflection surface that reflects light from a light source provided on an end surface,
A molding mold manufacturing process for manufacturing a molding mold by aligning the tips of a plurality of processing pins on the same plane and holding them on a processing pin holder,
A light guide material fixing step of bending and fixing the light guide material;
A method of manufacturing a light guide, comprising: a molding step of molding the recess by pushing the tip of the processing pin into the light guide material.   The method for manufacturing a light guide according to claim 1, wherein the molding step is performed by connecting the plurality of processing pin holders.   3. The method of manufacturing a light guide according to claim 1, wherein in the light guide material fixing step, the light guide material is bent and fixed by a pressing jig extending in a length direction.   The guide according to any one of claims 1 to 3, wherein in the molding step, the light guide material or the processing pin is heated to a temperature equal to or higher than a softening point temperature of the light guide material. Manufacturing method of light body.   5. The method of manufacturing a light guide according to claim 1, wherein in the molding die manufacturing step, a plurality of processing pins having the same shape are arranged at the same interval.

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