JP3207568U - Speaker box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To break a piece of wood by absorbing the expansion and contraction force of the pieces of wood by arc shape by joining the sides of the pieces of wood in an arc shape when producing a wooden spherical speaker box. Provided is a wooden spherical shell speaker box that does not warp and eliminates waste of materials. A virtual center axis line is drawn, a plurality of wood block blocks having a concave curved surface on an orthogonal line perpendicular to the center axis line and opposed to the center axis line are joined on both sides, and the curved surface of the block wood piece The maximum width is on a central orthogonal line perpendicular to the central point of the central axis, and on the orthogonal lines away from the central point, the width gradually decreases as the distance increases. A space was formed and the outer wall surface was completed by spherical processing. [Selection] Figure 4

Description

  The present invention relates to a speaker device used for music reproduction or the like.

  Conventionally, the speaker device has a shape as described in Patent Document 1 or Patent Document 2 or a spherical shell shape in which wooden pieces are stacked in a stacked shape described in Patent Document 3. Due to the characteristics of wood, it is known that wood warp back is generated in the process of drawing from the log, and when one side of the wood piece is bent, the wood piece is often warped due to the moisture gradient generated inside the wood. It has been.

JP-A-3-40699 Japanese Patent Laid-Open No. 3-101500 Patent No. 2946412

  The present invention provides a wooden spherical shell speaker box that is completed by joining the side surfaces of a piece of wood in an arc shape and absorbs the expansion and contraction force between the pieces of wood by the arc shape, thereby preventing the wood piece from cracking and warping. .

  The present invention draws a virtual center axis, joins a plurality of wood block blocks having a concave curved surface on an orthogonal line perpendicular to the center axis and facing the center axis on both sides, and the curved surface of the block wood piece The maximum width is on a central orthogonal line perpendicular to the central point of the central axis, and on the orthogonal lines away from the central point, the width gradually decreases as the distance increases. And the outer wall surface is spherically processed to form a wooden spherical shell speaker box.

  It is known that wood is always breathing under the influence of ambient temperature and humidity, but the speaker box formed by this device suppresses its movement, so it does not warp for a long time. A box can be provided, and the amount of wood used can be reduced compared to a method of stacking in a plane.

An embodiment of the present invention is shown, (a) is a top view of a triangular prism-shaped piece of wood with an isosceles triangle having a vertex angle of 15 degrees and a cross-section of the wood grain flowing in the height direction, (b) is from the central axis FIG. 3 is a side view of a piece of wood that has been cut in a straight line portion so that a speaker unit is inserted in an upward direction so as to draw an arc and cut in a straight line portion so that a speaker terminal enters; Similarly, (a) is a top view of an aggregate of cylindrical wooden pieces produced by assembling the above wooden pieces in an arc shape and applying an adhesive to the side surface and tying them up with strings, bands, etc., (b) is a side view. is there. Similarly, (a) is a spherical shell-shaped speaker box upper surface produced by cutting the outer surface of the above-mentioned piece of wood into a spherical shape, cutting the upper surface of the speaker unit-attached column and cutting the speaker terminal to the lower surface. It is a figure, (b) is a side view. Similarly, it is a perspective view (photograph) from the front upper right of the completed speaker box. Similarly, it is a perspective view (photograph) from the rear left upper part of the completed speaker box.

  The best mode for carrying out the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 (a) and 1 (b), 24 triangular prism-shaped wooden pieces 3 in which an isosceles triangle having a vertex angle of 15 degrees is a cross-section and the grain of the wood flows in the height direction are manufactured.

  Then, the wooden piece 3 is cut in a straight portion so that the triangular prism-shaped wooden piece is drawn so as to draw an arc from the central axis, and the speaker unit is inserted above, and the linear portion is sized so that the speaker terminals 2 and 2 are inserted below. Cut leaving.

  As shown in FIGS. 2 (a) and 2 (b), the wooden pieces 3 are assembled in an arc shape, an adhesive is applied to the side surface, and tied up with a string, a band or the like to form an aggregate of cylindrical wooden pieces 3.

  As shown in FIGS. 3 (a) and 3 (b), the outer surface of the aggregate of the wood pieces 3 is cut into a spherical shape, the upper surface is cut into a column for mounting the speaker unit to form a speaker unit mounting hole, and the speaker terminal is formed on the lower surface. A spherical shell-shaped speaker box is completed by cutting so that 2 and 2 are attached.

  As shown in FIG. 4, a spherical shell-like space is formed inside, and the outer wall surface is processed into a spherical surface.

  As shown in FIG. 5, the speaker terminal 2 is attached to the completed speaker box.

1 Speaker unit mounting hole 2 Speaker terminal 3 Wood chip

Claims (1)

  A virtual center axis line is drawn, and a plurality of wood block blocks having a concave curved surface on an orthogonal line perpendicular to the center axis line and facing the central axis line are joined on both sides, and the width of the curved surface of the block wood piece is A spherical shell-like space is formed in the interior by forming a maximum width on a central orthogonal line perpendicular to the central point of the central axis, and gradually decreasing on the orthogonal lines away from the central point. A speaker box characterized in that the outer wall surface is spherical.