JP2008168458A - Compressed wood product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressed wood product which reduces the member of parts and the number of work processes even in a case wherein a part having lens action with respect to light is provided to a part of the product and is easy to manufacture. <P>SOLUTION: The compressed wood product is composed of a part of wood compression molded into a predetermined three-dimensional shape and has an optical element part having lens action with respect to light. The wall thickness of the optical element part is less than that of the other part of wood. Further, one side of the optical element part is smoothly connected to the peripheral surface of the optical element part to be preferably formed into one flat or curved surface. The optical element part is formed by compressing wood so that the compression ratio in its thickness direction becomes 0.75 or above, preferably 0.80 or above. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a compressed wooden product formed using wood that has been compression-molded into a predetermined three-dimensional shape.

  In recent years, natural wood has attracted attention. Since wood has various grain patterns, individual differences occur depending on the location of the raw wood, and the individual differences are the individuality of each product. In addition, scratches and changes in color caused by long-term use may also have a unique texture and may be familiar to the user. For these reasons, wood is attracting attention as a material that can produce unique and tasty products that are not found in products using synthetic resins and light metals, and its processing technology is also making dramatic progress.

  Conventionally, as a processing technique of such wood, after compressing a piece of water softened and softened, and slicing the wood substantially parallel to the compression direction to obtain a plate-like primary fixed product, this primary fixed product is heated and absorbed by water. There is known a technique of forming a predetermined three-dimensional shape while performing the process (for example, see Patent Document 1). There is also known a technique in which a piece of wood compressed in a softened state is temporarily fixed, and this wood is put into a mold and recovered to mold (for example, see Patent Document 2). In these techniques, the thickness and compression rate of wood are determined in consideration of various points including individual differences and types of wood, strength of wood after processing, and its use.

Japanese Patent No. 3078462 JP-A-11-77619

  By the way, when providing a part having a lens action for light on a part of the wood formed as described above, the corresponding part is cut to form an opening, and another member such as a lens is attached to the formed opening. It is common to install. When attaching such a separate member, the attachment must be done so that the wood is not damaged or the adhesive is exposed to the surface and the aesthetics of the entire product containing wood are not impaired. It was. For this reason, there is a problem that the number of parts is large and the number of work steps is large, which takes time.

  The present invention has been made in view of the above, and even when a part having a lens action with respect to light is provided in a part of a product, the number of parts and the number of work steps are small, and the manufacturing is easy. The purpose is to provide compressed wood products.

  In order to solve the above-described problems and achieve the object, one aspect of the present invention is a compressed wooden product formed using wood that has been compression-molded into a predetermined three-dimensional shape, from a portion of the wood. And an optical element portion having a lens action with respect to light.

  Moreover, in the said invention, the said optical element is good also as thickness being smaller than the other part of the said compression wooden product.

  Moreover, in the said invention, one surface of the said optical element part is good also as a flat surface or a curved surface connected smoothly with the surrounding surface.

  In the above invention, the optical element portion may be formed by compressing so that the compressibility in the thickness direction is 0.75 or more.

  In the above invention, the optical element portion may be formed by compressing so that the compressibility in the thickness direction is 0.80 or more.

  According to the compressed wood product according to the present invention, a part of the wood that is compression-molded into a predetermined three-dimensional shape is provided with an optical element portion that has a lens function with respect to the light, so that a part of the product is exposed to the light. Even when a portion having a lens action is provided, it is not necessary to use a separate member for the portion. Therefore, the number of parts and the number of work steps can be reduced, and manufacturing is easy.

  The best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described below with reference to the accompanying drawings. Note that the drawings referred to in the following description are merely schematic, and when the same object is shown in different drawings, dimensions, scales, and the like may be different.

(Embodiment 1)
FIG. 1 is a diagram showing an application example of a compressed wood product according to Embodiment 1 of the present invention. Specifically, the digital display is covered with a cover member formed from the compressed wood product according to Embodiment 1. FIG. It is a perspective view which shows the external appearance structure of a camera. A digital camera 100 shown in the figure includes an image pickup unit 101 including an image pickup lens, a flash 102, and a shutter button 103, and is covered with two cover members 1 and 2. Inside the digital camera 100, there are a control circuit that performs drive control relating to imaging processing, a solid-state imaging device such as a CCD or CMOS, a microphone or speaker that inputs and outputs audio, and each functional member under the control of the control circuit. A driving circuit or the like for driving is provided.

  FIG. 2 is a perspective view showing a schematic configuration of the cover member 1 that covers the front side of the digital camera 100 (the subject side during shooting). 3 is a cross-sectional view taken along line AA in FIG. The cover member 1 as a compressed wood product shown in these figures is a flat main plate portion 1a having a substantially rectangular surface, and extends along the longitudinal direction of the main plate portion 1a and at a predetermined angle with respect to the main plate portion 1a. Two side plate portions 1b to be taken out, and two side plate portions 1c extending along the short direction of the main plate portion 1a and extending at a predetermined angle with respect to the main plate portion 1a are formed in a substantially bowl shape as a whole. .

  The main plate portion 1a has a smaller thickness than the other portions, and has an optical element portion 11 having a lens effect on light, a cylindrical opening portion 12 that exposes the imaging portion 101, and a rectangular parallelepiped that exposes the flash 102. A shaped opening 13 is formed. The side plate portion 1b is provided with a semicylindrical cutout 14. Here, “having a lens action with respect to light” means having a property of realizing diffusion and convergence of light by refracting light.

  The optical element portion 11 has a convex spherical or aspherical surface shape with the inner side surface (the side surface positioned upward in FIG. 3), and the outer side surface is smoothly connected to the outer side surface of the main plate 1a without a step. In this sense, the optical element portion 11 forms a single curved surface (the outer surface of the cover member 1) smoothly connected to the surrounding surface. Further, an inclined surface 15 having a side shape of a truncated cone is interposed between the inner side surface of the optical element portion 11 and the inner side surface of the main plate portion 1a. The slope 15 has a circular cross section perpendicular to the thickness direction of the main plate portion 1a. The diameter of the circular cross section gradually decreases from the inner surface of the main plate portion 1a toward the optical element portion 11. . The optical element portion 11 is compressed to such an extent that the properties as wood are lost, and unlike other portions of the cover member 1, has a property of transmitting light. Furthermore, since the optical element portion 11 has a convex spherical or aspherical shape on one surface (inner surface in the first embodiment), the optical element portion 11 exhibits an action similar to that of a convex lens.

  A self-timer LED (Light Emitting Diode; not shown) is arranged inside the optical element unit 11, and the blinking of the LED is transmitted to the outside of the digital camera 100 through the optical element unit 11. It has become so.

  The cover member 2 that covers the back side of the digital camera 100 (photographer side at the time of shooting) has substantially the same shape as the cover member 1. The cover member 2 is also appropriately formed with an opening and a notch for exposing necessary members from the inside of the digital camera 100. For example, when the digital camera 100 is assembled, a cutout having the same semi-cylindrical shape as the cutout 14 is provided at a position facing the cutout 14 of the cover member 1. An opening for exposing the shutter button 103 is formed in combination with the notch 14.

  In addition to the openings and notches described above, the cover member 1 or 2 may be provided with an opening for attaching a finder and an opening for displaying an input key for receiving an operation instruction signal. In addition, an opening or a notch that exposes an interface for connection with an external device (including a DC input terminal, a USB connection terminal, and the like) may be provided. Further, the cover member 1 or 2 may be provided with a sound output hole for outputting sound generated by a speaker inside the digital camera 100.

  Next, a method for manufacturing the cover member 1 will be described. First, the wood used as the raw material of the cover member 1 is formed from the uncompressed solid material that is the raw wood (the shaping process). At this time, the volume of the timber to be shaped is set to a volume obtained by adding in advance a volume reduced by a compression process described later. As the solid wood, an optimum material may be selected from cypress, hiba, paulownia, cedar, pine, cherry blossom, cocoon, ebony, rosewood, bamboo, teak, mahogany, rosewood and the like. In the first embodiment, it is assumed that the wood is shaped so as to have a substantially bowl shape close to the shape of the cover member 1, but the cover member 1 is manufactured using the wood shaped in a flat plate shape. It is also possible.

  In addition, as the wood to be formed from the solid material, it is possible to select and use an optimal material from among a wood material, a plate material, a memorial material, a mouthpiece material, and the like. In view of this point, when describing wood in the accompanying drawings, the description is omitted.

  Thereafter, the shaped wood is allowed to stand in a steam atmosphere at a higher temperature and pressure than the atmosphere for a predetermined time, and the wood is sufficiently softened by absorbing moisture excessively (softening step). The high temperature and high pressure here means a temperature of 100 to 230 ° C., more preferably 180 to 230 ° C., still more preferably about 180 to 200 ° C., and a pressure of 0.1 to 3.0 MPa (megapascal), more preferably. Indicates a state of about 0.45 to 2.5 MPa, more preferably about 1.0 to 1.6 MPa. Instead of leaving the wood softened in the steam atmosphere described above, the wood may be softened by heating with high-frequency electromagnetic waves such as microwaves.

  Subsequently, the wood sufficiently softened by the softening process is compressed in the same water vapor atmosphere as the softening process (compression process). FIG. 4 is a diagram showing an outline of this compression process. In the same figure, the timber 10 (having the main plate portion 10a and the two side plate portions 10b and 10c, respectively) shaped so as to have a substantially bowl shape close to the cover member 1 and softened as described above is a pair of It is clamped by the molds 81 and 91 and a compressive force is applied. Hereafter, each structure of the metal mold | die 81 and 91 is demonstrated.

  First, in FIG. 4, a mold 81 for applying a compressive force from above the wood 10 has a convex portion 82 having a shape that fits the curved curved inner surface from the main plate portion 10 a to the side plate portions 10 b and 10 c of the wood 10. Have. FIG. 5 is a perspective view showing the configuration of the convex portion 82, and is a view in which the left and right direction (y-axis direction) of the mold 81 shown in FIG. . For this reason, the BB line in FIG. 5 (passing the protrusion 83 in parallel with the x-axis direction) is the same as the BB line in FIG. As shown in FIG. 5, a frustoconical protrusion 83 is provided on the bottom surface of the protrusion 82. A recess 83 a corresponding to the shape of the optical element portion 11 is formed at the tip of the projection 83. Further, the shape of the side surface of the protrusion 83 corresponds to the shape of the slope 15.

  6 is a cross-sectional view taken along line BB in FIG. When the radius of curvature of the inner surface of the curved surface 10ac curved from the main plate portion 10a to the side plate portion 10c among the inner surfaces of the wood 10 is RI, and the radius of curvature of the curved surface that contacts the curved surface 10ac of the convex portion 82 is RA. There is a relationship of RI> RA between the two radii of curvature.

  Next, the structure of the metal mold | die 91 which applies a compressive force from the downward direction of the timber 10 is demonstrated in FIG. The mold 91 has a concave portion 92 into which curved outer surfaces are respectively curved from the main plate portion 10a of the wood 10 to the side plate portions 10b and 10c. Of the outer surfaces of the wood 10, the radius of curvature of the outer surface of the curved surface 10ac is RO, and the radius of curvature of the curved surface that contacts the outer surface of the curved surface 10ac of the concave portion 92 is RB. , RO> RB.

  When the wood 10 is sandwiched and compressed by the pair of molds 81 and 91 having the above-described configuration, the mold 81 and / or 91 is electrically moved by using an appropriate driving means, and compression applied to the wood 10 Adjust the force. Note that the mold 81 and the mold 91 may be coupled with a screw, and the mold 81 may be moved up and down with respect to the mold 91 by manually or automatically tightening the screw.

  FIG. 7 is a view showing a state in which the wood 10 is sandwiched and compressed by the molds 81 and 91 and is a longitudinal sectional view showing a state in which the deformation of the wood 10 is almost completed. As shown in FIG. 7, the wood 10 is deformed into a three-dimensional shape corresponding to the gap between the mold 81 and the mold 91 by compression. At this time, the portion of the main plate portion 10a with which the protruding portion 83 is in contact is compressed at a higher compression rate than the other portions. In the first embodiment, the compression ratio of the portion compressed by the protrusion 83, that is, the portion that becomes the optical element portion 11 (the value ΔR / of the ratio between the thickness reduction ΔR due to compression and the thickness R before compression) R) is 0.75 or more, more preferably 0.80 or more. As a result, the specific gravity of the portion after compression is about 1.4, and takes a value close to 1.5, which is the specific gravity of a general wood cell wall substantial part.

  When wood is compressed in a high-temperature and high-pressure steam atmosphere as described above until the specific gravity is close to 1.5, the quality of the wood is lost and the properties of the wood are lost. (For example, Kitazawa, Kitamura, Shibuya, Kojima, “Permanent fixing phenomenon of compressed cedar compacted wood close to the compaction limit”, Abstracts of the 21st Annual Meeting of the Japan Wood Processing Technology Association (See 2003)). The wood that has undergone such alteration becomes substantially a resin, and has a property of transmitting light while having a shade like tortoise by compression. Therefore, the part which can permeate | transmit light can be formed in integral wood, without using the separate member which has transparency like the past.

  After leaving for a predetermined time (1 to several tens of minutes, more preferably about 5 to 10 minutes) in the state shown in FIG. 7, the water vapor atmosphere is released to dry the wood 10, and the mold 81 and the mold 91 are separated from each other. To release the compression. As a result, the shape of the wood 10 is fixed, and the prototype of the cover member 1 is completed. By the compression process, the thickness of the main plate portion 10a becomes substantially uniform except for the optical element portion 11 and the inclined surface 15. The compression ratio in the thickness direction of the main plate portion 10a excluding the optical element portion 11 and the inclined surface 15 is about 0.40 to 0.70, more preferably about 0.50 to 0.70.

  Here, a specific numerical example is given. When the thickness of the main plate portion 10a before compression is 3.2 mm and the thickness of the main plate portion 1a after compression is 1.6 mm, the compression ratio of the main plate portion excluding the optical element portion 11 and the slope 15 is 0.50. It becomes. On the other hand, when the maximum thickness of the optical element portion 11 is 0.80 mm, the compression ratio of the optical element portion 11 is 0.75 or more. The compression rate of the slope 15 is at least equal to or greater than the compression rate of the main plate portion 1a, and gradually increases from the inner surface of the main plate portion 1a toward the optical element portion 11, and the value is about 0.50 to 0.75. Vary between. In the shaping step, the thickness of the portion of the wood that becomes the optical element portion 11 is shaped smaller than the thickness of the other portions, and the compression ratio is more than or equal to 0.75, more preferably You may make it compress so that it may become 0.80 or more.

  After the compression step described above, the wood 10 is shaped into a predetermined three-dimensional shape by performing processing such as cutting, polishing, and polishing on the wood 10 (shaping step). Thereby, the cover member 1 as a compressed wood product is completed.

  According to the compressed wood product according to the first embodiment of the present invention described above, the optical element unit is formed of a part of wood that is compression-molded into a predetermined three-dimensional shape and has a lens function with respect to light. Even when a part having a lens action for light is provided in a part of the product, it is not necessary to use a separate member for the part. Therefore, even when a part having a lens action with respect to light is provided in a part of the product, the number of parts and the number of work steps can be reduced, and manufacturing is easy.

  Further, according to the first embodiment, since one surface of the optical element portion is smoothly connected to the surrounding surface to form a single curved surface, the user can perform the operation unless the LED inside the optical element portion emits light. It is not necessary to worry about the presence of the optical element part. Further, unlike the case where the optical element portion is manufactured with a separate member, moisture, dust, or the like does not enter the gap between the members.

  The compressed wood product according to the first embodiment can be applied as an exterior body of a portable small electronic device other than a digital camera. Specifically, it can also be used as a mobile phone, a portable communication terminal such as PHS or PDA, a portable audio device, an IC recorder, a portable TV, a portable radio, a remote control for various home appliances, and an exterior body for digital video, etc. It is. When applied to these electronic devices, the thickness of the compressed wood product is preferably about 1.6 to 2.0 mm.

(Modification of Embodiment 1)
FIG. 8 is a cross-sectional view illustrating a schematic configuration of a cover member for a digital camera that is a compressed wood product according to a first modification of the first embodiment, and corresponds to FIG. 3. The cover member 3 shown in FIG. 8 has a substantially bowl shape like the cover member 1, and has a main plate portion 3a and two side plate portions 3b and 3c (the side plate portion 3b is not shown).

  Further, the cover member 3 is formed with an opening and a notch in the same manner as the cover member 1. Of these, FIG. 8 shows an opening 33 that has the same shape as the opening 13 of the cover member 1 and exposes the flash.

  The main plate portion 3a is provided with an optical element portion 31 having a property of having a lens action with respect to light, which is smaller than the thickness of other portions. The optical element portion 31 has an inner side surface (a side surface located upward in FIG. 8) forming a flat surface, and an outer side surface protruding into a spherical or aspherical shape that is more convex than the surrounding main plate portion 1a. The optical element portion 31 is compressed to such an extent that the properties as wood are lost, and has a property of transmitting light. Furthermore, since the optical element portion 31 has a convex spherical or aspherical shape on one surface (in this modification, the outer surface), the optical element portion 31 exhibits the same action as a convex lens.

  Between the inner side surface of the optical element portion 31 and the inner side surface of the main plate portion 3a, an inclined surface 35 having a side shape of a truncated cone is interposed. The slope 35 has a circular cross section perpendicular to the thickness direction of the main plate portion 3a, as in the case of the slope 15 of the first embodiment. The diameter of the circular cross section is the optical element portion 31 from the inner side surface of the main plate portion 3a. It gets smaller gradually as you get closer to.

  FIG. 9 is a cross-sectional view showing a schematic configuration of a cover member for a digital camera that is a compressed wood product according to the second modification of the first embodiment. The cover member 4 shown in the figure is substantially bowl-shaped like the cover member 1 and has a main plate portion 4a and two side plate portions 4b and 4c (the side plate portion 4b is not shown). Moreover, the opening part and the notch are also formed in the same manner as the cover member 1 (in FIG. 9, the opening part 43 that has the same shape as the opening part 13 of the cover member 1 and exposes the flash is shown).

  The main plate portion 4a is provided with an optical element portion 41 having a thickness smaller than that of other portions and having a lens function with respect to light. The optical element portion 41 has a shape in which the inner side surface (the side surface positioned upward in FIG. 9) is a flat surface, while the outer side surface is recessed into a concave spherical or aspherical shape. The optical element portion 41 is compressed to such an extent that the properties as wood are lost, and has a property of transmitting light. Further, since the optical element portion 41 has a concave spherical surface or an aspherical surface on one surface (in this modification, the outer surface), the optical element portion 41 exhibits an action similar to that of a concave lens.

  The manufacturing method of the cover members 3 and 4 is the same as the manufacturing method of the cover member 1 except for the difference in the mold shape to be used.

  According to the compressed wood product according to the modified example of the first embodiment described above, the optical element portion is formed of a part of wood that has been compression-molded into a predetermined three-dimensional shape and has a lens action on light. Thus, as in the first embodiment described above, even when a part having a lens action with respect to light is provided in a part of the product, the number of parts and the number of work steps are small, and the manufacturing is easy.

(Embodiment 2)
FIG. 10 is a diagram showing a configuration of an instrument panel of an automobile which is a compressed wood product according to Embodiment 2 of the present invention. The instrument panel 200 shown in the figure is provided so as to surround the periphery of the meter panel 300, and has a wood panel portion 5 made of compression-molded wood on the lower surface side of the meter panel 300. Near the central portion of the wood panel portion 5, optical element portions 51 having a property of having a lens effect on light are formed (three in FIG. 10). On the back side of the optical element unit 51, an LED that is lit when notifying the driver of predetermined information is installed.

  The optical element portion 51 is formed by compressing so that the compressibility in the thickness direction is 0.75 or more, more preferably 0.80 or more. The cross-sectional shape of the optical element portion 51 is the same as the cross-sectional shape of the optical element portion 11 described in the first embodiment, and the surface shown in FIG. 10 is smoothly connected to the surface around the wood panel portion 5 without a step. A single plane or curved surface. Further, on the back side of the wood panel portion 5, a slope (not shown) is interposed between the optical element portion 51 and the surface on the back side of the wood panel portion 5. In addition, the compression ratio of the thickness direction of parts other than the optical element part 51 of the wood panel part 5 is about 0.40-0.70, More preferably, it is about 0.50-0.70.

  When the wood panel unit 5 having the above configuration is applied, the driver can perform a driving operation without worrying about the presence of the optical element unit 51 during normal driving. For this reason, when the LED installed in the optical element unit 51 is turned on, the driver's special attention can be drawn. In view of these points, in the second embodiment, the LED installed on the back side of the optical element unit 51 is notified of information that hardly illuminates during normal driving, such as a sudden stop or some warning. It is preferable to apply for this purpose.

  The compressed wood product according to the second embodiment can be compression-molded by using a mold corresponding to the final shape after processing in a high-temperature and high-pressure steam atmosphere as in the first embodiment. The same can be said for the third and fourth embodiments described later.

  According to the compressed wood product according to the second embodiment of the present invention described above, the optical element unit is formed of a part of wood that is compression-molded into a predetermined three-dimensional shape and has a lens function with respect to light. Even when a part having a lens action with respect to light is provided in a part of the product, it is not necessary to use a separate member for the part. Therefore, similarly to the first embodiment, even when a part having a lens action with respect to light is provided in a part of the product, the number of parts and the number of work steps can be reduced, and the manufacturing becomes easy.

  In addition, according to the second embodiment, one surface of the optical element portion is smoothly connected to the surrounding surface to form a single curved surface, so that the beauty of the wood grain can be utilized, In addition, excellent compressed wood products can be provided. Further, the user does not have to worry about the presence of the optical element part unless the LED inside the optical element part emits light.

  In the second embodiment, it is also possible to apply an optical element portion having a cross-sectional shape similar to that of the optical element portion 31 or 41 described in the modification of the first embodiment.

(Embodiment 3)
FIG. 11 is a diagram showing the configuration of the handle of an automobile that is a compressed wood product according to Embodiment 3 of the present invention. A handle 400 shown in the figure is provided with a wood grip portion 6 made of compression-molded wood near the top of the grip. In the central part of the wood grip part 6, optical element parts 61 having a property of having a lens effect on light are formed (eight in FIG. 11). On the back side of the optical element portion 61, an LED that is lit when notifying the driver of predetermined information is installed.

  The optical element section 61 has a curved surface that is smoothly connected to the surrounding surface. In addition, the back side of the optical element portion 61 is projected into a convex spherical or aspherical shape. Such an optical element part 61 is formed by compressing so that the compressibility in the thickness direction is 0.75 or more, more preferably 0.80 or more. The compression ratio in the thickness direction of the portion other than the optical element portion 61 of the wood grip portion 6 is about 0.40 to 0.70, more preferably about 0.50 to 0.70.

  When the wood grip portion 6 having the above configuration is applied, when the handle 400 is operated, the LED installed on the back side of the optical element portion 61 is frequently lit. You may not be able to concentrate on. In view of this point, in the third embodiment, the LED installed on the back side of the optical element unit 61 is notified of information that hardly illuminates during normal operation, such as a sudden stop or some warning. Therefore, it is preferable to apply.

  According to the compressed wood product according to Embodiment 3 of the present invention described above, it is made of a part of wood that has been compression-molded into a predetermined three-dimensional shape, and by forming an optical element portion that has a lens effect on light, Similar to the first and second embodiments, even when a part having a lens action with respect to light is provided in a part of the product, the number of parts and the number of work steps are reduced, and the manufacturing becomes easy.

  Further, according to the third embodiment, the surface of the optical element portion is smoothly connected to the surrounding surface to form a single curved surface, so that the driver does not feel uncomfortable when operating the driver. In addition, the beauty of the wood grain can be utilized, and a compressed wood product that is excellent in design can be provided.

(Embodiment 4)
FIG. 12 is a diagram showing a configuration of a door knob that is a compressed wood product according to Embodiment 4 of the present invention. The doorknob 7 shown in the figure is made of compression-molded wood, has a hollow cylindrical shape with one end being an open end, and has an optical property having a lens effect on light on a circular bottom surface having a closed end. An element part 71 is provided.

  The surface of the optical element portion 71 is smoothly connected to the surrounding surface (bottom surface portion) to form a single plane. Further, the back side of the optical element portion 71 is projected into a convex spherical or aspherical shape. Such an optical element portion 71 is formed by compressing so that the compressibility in the thickness direction is 0.75 or more, more preferably 0.80 or more. The compressibility in the thickness direction of the door knob 7 other than the optical element portion 71 is about 0.40 to 0.70, more preferably about 0.50 to 0.70.

  Inside the door knob 7, a light bulb such as an LED is provided. By turning on this light bulb, the position of the door knob 7 can be clearly shown in the surroundings when the surroundings are dark at night or the like.

  According to the fourth embodiment of the present invention described above, as in the first to third embodiments described above, even when a part having a lens action with respect to light is provided on a part of the product, the number of parts and the work are reduced. It is possible to provide a compressed wood product that requires less man-hours and is easy to manufacture.

  In the fourth embodiment, it is also possible to apply an optical element portion having a cross-sectional shape similar to that of the optical element portion 31 or 41 described in the modification of the first embodiment.

(Other embodiments)
Up to this point, the best mode for carrying out the present invention has been described in detail as the first to fourth embodiments, but the present invention should not be limited only by these four embodiments. For example, the optical element may be compression molded so as to have a lens shape other than those described above. Specifically, the surface of the optical element may have a surface shape similar to a cylindrical lens, a Fresnel lens, an aspheric lens, or the like.

  Thus, the present invention can include various embodiments and the like not described herein, and various design changes and the like can be made without departing from the technical idea specified by the claims. It is possible to apply.

It is a perspective view which shows the external appearance structure of the digital camera which applied the compressed wood product which concerns on Embodiment 1 of this invention as an exterior body. It is a perspective view which shows the structure of the cover member which is the compression wood product which concerns on Embodiment 1 of this invention. It is the sectional view on the AA line of FIG. It is explanatory drawing which shows the outline | summary of the compression process in the manufacturing method of the cover member which is the compression wooden product which concerns on Embodiment 1 of this invention. It is a perspective view which shows the structure of the metal mold | die which applies a compressive force from the upper direction of wood. It is the BB sectional view taken on the line of FIG. It is a figure which shows the state which the deformation | transformation of the timber was completed substantially in the compression process. It is sectional drawing which shows the structure of the cover member which is a compression wooden product which concerns on the 1st modification of Embodiment 1 of this invention. It is sectional drawing which shows the structure of the cover member which is the compression wooden product which concerns on the 2nd modification of Embodiment 1 of this invention. It is a figure which shows the structure of the principal part of the instrument panel which is a compression wood product which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the handle | steering-wheel which is the compression wooden product which concerns on Embodiment 3 of this invention. It is a figure which shows the structure of the doorknob which is the compression wood product which concerns on Embodiment 4 of this invention.

Explanation of symbols

1, 2, 3, 4 Cover members (compressed wood products)
1a, 3a, 4a, 10a Main plate portion 1b, 1c, 3b, 3c, 4b, 4c, 10b, 10c Side plate portion 5 Wood panel portion 6 Wood grip portion 7 Door knob (compressed wood product)
DESCRIPTION OF SYMBOLS 10 Wood 10ac Curved surface 11, 31, 41, 51, 61, 71 Optical element part 12, 13, 33, 43 Opening part 14 Notch 15, 35 Slope 81,91 Mold 82 Convex part 83 Protrusion part 83a Depression 92 Concave part 100 Digital camera 101 Imaging unit 102 Flash 103 Shutter button 200 Instrument panel (compressed wood product)
300 Meter panel 400 Handle (compressed wood product)

Claims (5)

A compressed wood product formed using wood compressed and molded into a predetermined three-dimensional shape,
A compressed wood product comprising an optical element portion made of a part of the wood and having a lens effect on light.   The compressed wood product according to claim 1, wherein the thickness of the optical element portion is smaller than the thickness of the other part of the wood.   3. The compressed wood product according to claim 1, wherein one surface of the optical element portion is smoothly connected to a surrounding surface to form one plane or a curved surface.   The said optical element part was formed by compressing so that the compression rate of a thickness direction might be 0.75 or more, The compression wooden product as described in any one of Claims 1-3 characterized by the above-mentioned.   5. The compressed wood product according to claim 4, wherein the optical element portion is formed by compressing so that a compressibility in a thickness direction is 0.80 or more.

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