US20210239438A1 - Throwing star target - Google Patents

Throwing star target Download PDF

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Publication number
US20210239438A1
US20210239438A1 US17/054,289 US201917054289A US2021239438A1 US 20210239438 A1 US20210239438 A1 US 20210239438A1 US 201917054289 A US201917054289 A US 201917054289A US 2021239438 A1 US2021239438 A1 US 2021239438A1
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US
United States
Prior art keywords
target
throwing star
throwing
pins
star
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US17/054,289
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English (en)
Inventor
Shinichiro Yamamoto
Hideki Saito
Yuuki Kaneto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sega Corp
Dartslive Co Ltd
Original Assignee
Sega Corp
Dartslive Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sega Corp, Dartslive Co Ltd filed Critical Sega Corp
Assigned to KABUSHIKI KAISHA DARTSLIVE D/B/A DARTSLIVE CO., LTD., SEGA CORPORATION reassignment KABUSHIKI KAISHA DARTSLIVE D/B/A DARTSLIVE CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANETO, Yuuki, SAITO, HIDEKI, YAMAMOTO, SHINICHIRO
Publication of US20210239438A1 publication Critical patent/US20210239438A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J3/00—Targets for arrows or darts, e.g. for sporting or amusement purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J1/00—Targets; Target stands; Target holders
    • F41J1/01—Target discs characterised by their material, structure or surface, e.g. clay pigeon targets characterised by their material

Definitions

  • the present invention relates to a throwing star target.
  • a throwing star throwing experience is popular among inbound tourists to Japan. As a way to promote the nation as a tourism-based country, it is desirable to offer a broader throwing experience of throwing stars.
  • some problems are evident in the throwing experience of throwing stars.
  • a throwing star target produced by attaching a paper target sheet, on which a concentric circle target is printed, to a support member such as a tatami mat, plywood, or formed plastic is used.
  • a throwing star thrown by a beginner does not easily stick in such a target even when the throwing star hits the target.
  • a throwing star made of metal may hurt a finger. When a thrower is afraid of being injured, it is difficult for the thrower to throw the throwing star with all his/her strength.
  • a safe throwing star made of rubber is light, and hence the throwing star is less likely to stick in the target than the throwing star made of metal.
  • the throwing star target in the prior art has a problem with durability in addition to the problem of the throwing star not easily sticking in the target.
  • a large hole is made in the paper target sheet or the support member.
  • the paper target sheet or the support member begins to have many fine splits and the pleasant appearance of the throwing star target is spoiled.
  • the throwing star target is replaced with a new throwing star target frequently to maintain the pleasant appearance of the throwing star target or, the throwing star target is kept used in a state, where the pleasant appearance of the throwing star target is spoiled, to avoid an economic burden.
  • Patent Document 1 a target which can be used repeatedly while the pleasant appearance of the target is maintained.
  • the target stand of a blow dart is covered with oil-based clay, and a paper target sheet is attached to the oil-based clay. Even when the oil-based clay serving as a support member becomes full of holes, it is possible to mend the oil-based clay by flattening the oil-based clay with fingers.
  • Patent Document 1 Patent Publication JP-A-2017-207268
  • the support member is the oil-based clay
  • the throwing star does not easily stick in the target.
  • the safe throwing star made of rubber does not stick deeply in hard clay.
  • the blow dart of which tip is a needle when the throwing star of which tip is a sword is thrown, a larger hole is made in the paper target sheet. According to the invention described in Patent Document 1, it is possible to mend the support member, but the invention cannot solve the problem of the paper target sheet having many fine splits spoiling the pleasant appearance of the target.
  • an object of the present invention is to provide a throwing star target in which a throwing star easily sticks and which has excellent durability.
  • An aspect of the present invention is a throwing star target which holds a thrown throwing star.
  • the throwing star target includes a board, and a plurality of pins arranged on a target surface of the board.
  • Each of the plurality of pins has a polygonal cross section, is formed to be tapered, and has a flat surface which comes into contact with a front side or a back side of the throwing star that is in a state of being held.
  • the front side and the back side of the throwing star are supported by the flat surfaces, and hence the throwing star having hit the target does not easily fall and is easily held in a state in which the throwing star sticks in the target as compared with the case where the front side and the back side of the throwing star are supported by points or lines.
  • the plurality of pins may be arranged at regular intervals on the target surface along a first direction, a second direction, and a third direction each obtained by rotation by 120° about an axis perpendicular to the target surface, each of the plurality of pins may have a first surface which is formed along a fourth direction obtained by rotating the first direction about the axis by 90°, a second surface which is formed along a fifth direction obtained by rotating the second direction about the axis by 90°, and a third surface which is formed along a sixth direction obtained by rotating the third direction about the axis by 90°, in a pair of the pins which are adjacent to each other, the first surface of one of the pins and the first surface of the other of the pins may face each other, with a gap being formed therebetween, and the gap at tip portions of the pins may be greater than a plate thickness of the throwing star and the gap at holding portions of the pins, which are closer to the board than the tip portions are, may be smaller than the plate thickness of the
  • each of the plurality of pins may include a shape of a hexagonal frustum or a hexagonal prism constituted of a pair of the first surfaces, a pair of the second surfaces, and a pair of the third surfaces.
  • the cross section is hexagonal, and hence it is easy to arrange the pins. As compared with the case where the cross section is triangular, a corner is not easily damaged and the pin is not easily broken.
  • each of the plurality of pins may further include a fillet portion which is smoothly contiguous with the target surface, and the fillet portions each may have an outer edge formed into a hexagonal shape and may be arranged without any space therebetween on the target surface.
  • the fillet portion which spreads outward is provided, the outer edge of the fillet portion is hexagonal, and hence it is possible to arrange the pins closely in accordance with the plate thickness of the throwing star.
  • the present invention it is possible to provide the throwing star target in which the throwing star easily sticks and which has excellent durability.
  • FIG. 1 is a perspective view showing a throwing star target according to an embodiment of the present invention.
  • FIG. 2 is a plan view of the throwing star target shown in FIG. 1 .
  • FIG. 3 is a side view when pins arranged in a first direction are viewed from a fourth direction.
  • FIG. 4 is a plan view showing a throwing star target according to a modification of the present invention.
  • a throwing star target 1 (hereinafter simply referred to as a “target 1 ” in some cases) of an embodiment of the present invention is that flat surfaces 20 U, 20 V, and 20 W which come into surface contact with a front side 2 A and a back side 2 B of a plate-like throwing star 2 from both sides are formed on individual pins 20 (see FIG. 1 and FIG. 4 ).
  • the throwing star 2 is held in one of pockets 31 , 32 , and 33 between pins 20 L and 20 R which bend reversibly instead of a paper target sheet or a support member which is destroyed irreversibly (see FIG. 2 ). Even when the throwing star target 1 is repeatedly used, the throwing star target 1 does not have many splits and the pleasant appearance of the throwing star target 1 is not spoiled.
  • the center of gravity is located not in a sword 41 at its tip but in a coupling portion 42 positioned at the center.
  • the throwing star 2 is unstable in a state in which the throwing star 2 sticks in the target 1 correspondingly to a longer distance from a target surface 10 A to the center of gravity.
  • an XY cross section of the pin 20 is not circular but polygonal, and a contact area C with each pf the front side 2 A and the back side 2 B of the throwing star 2 is large (see FIG. 3 ). Consequently, it is easy to hold the throwing star 2 of which the center of gravity is unstable in a state in which the throwing star 2 sticks in the target 1 .
  • each configuration will be described in detail with reference to FIGS. 1 to 4 .
  • FIG. 1 is a perspective view showing the throwing star target 1 according to the embodiment of the present invention, and the throwing star 2 which sticks in the target 1 .
  • the throwing star 2 is formed into the shape of a windmill which has a plurality of swords 41 which extend radially and a coupling portion 42 which connects the plurality of swords 41 .
  • An example shown in FIG. 1 shows the throwing star 2 constituted of a rubber plate which is formed into the shape of a cross.
  • a plate thickness F of the rubber plate is, e.g., about 5 mm.
  • Each sword 41 has a pointed tip.
  • An edge 41 E at the tip is formed to form an acute angle like a blade.
  • the tip thereof is a needle, and hence force is concentrated at one point.
  • force is dispersed over the ridge of the edge 41 E, and hence the throwing star 2 does not easily stick.
  • the throwing star target 1 of the present embodiment is configured so as to hold the above-described throwing star 2 in a state in which the throwing star 2 sticks in the throwing star target 1 without falling when the throwing star 2 hits the throwing star target 1 .
  • the throwing star target 1 includes a board (base) 10 and a plurality of pins (protrusions) 20 .
  • the board 10 and the pins 20 constitute an integral structure formed of resin material such as polyamide resin.
  • the throwing star target 1 may be a translucent target or a lightproof target. In the case where the throwing star target 1 is constituted of resin material having translucency, it is possible to apply light to a back surface 10 B and draw a moving target on the target surface 10 A.
  • the board 10 is formed into a plate-like shape having a certain thickness, and has the flat target surface (board surface) 10 A.
  • the target surface 10 A is formed in parallel to a longitudinal direction X and a lateral direction Y intersecting the longitudinal direction X.
  • a thickness direction Z of the board 10 intersects the longitudinal direction X and the lateral direction Y.
  • the longitudinal direction X and the lateral direction Y of the target surface 10 A and the thickness direction Z of the board 10 are orthogonal to each other.
  • Each pin 20 has a polygonal XY cross section, is formed to be tapered, and has flat surfaces 20 U, 20 V, and 20 W which come into surface contact with the front side 2 A or the back side 2 B of the throwing star 2 which is held by the target 1 .
  • the XY cross section of the pin 20 cut by an XY plane parallel to the target surface 10 A is formed into a hexagonal shape.
  • the pin 20 is short, when the throwing star 2 hits the target 1 , the throwing star 2 easily falls without sticking in the target 1 .
  • the pin 20 is long, when the throwing star 2 hits the target 1 , the pin 20 is easily broken.
  • the height of the pin 20 is, e.g., about 2 cm.
  • FIG. 2 is a plan view of the throwing star target 1 .
  • the plurality of pins 20 are arranged on the target surface 10 A.
  • the plurality of pins 20 are arranged at regular intervals on the target surface 10 A along a first direction R, a second direction S, and a third direction Teach obtained by rotation by 120° about a Z axis perpendicular to the target surface 10 A.
  • the above-described surfaces 20 U, 20 V, and 20 W are formed along fourth to sixth directions U, V, and W obtained by rotating the first to third directions R, S, and T about the Z axis by 90°.
  • the throwing star 2 flying toward the target 1 is rotating, e.g., longitudinally.
  • an example of the fourth direction U is a twelve o'clock direction which connects twelve o'clock and six o'clock
  • an example of the fifth direction V is a four o'clock direction which connects four o'clock and ten o'clock
  • an example of the sixth direction W is an eight o'clock direction which connects eight o'clock and two o'clock.
  • An example of the above-described longitudinal direction X is the twelve o'clock direction, and coincides with the fourth direction U. Note that, there are cases where the throwing star target 1 is tilted and installed, and hence the longitudinal direction X of the target surface 10 A does not necessarily coincide with a vertical direction.
  • the fourth to sixth directions U, V, and W are directions obtained by rotating the first to third directions R, S, and T about the Z axis by 90°. That is, an example of the first direction R is a nine o'clock direction which connects nine o'clock and three o'clock, an example of the second direction S is a one o'clock direction which connects one o'clock and seven o'clock, and an example of the third direction T is a five o'clock direction which connects five o'clock and eleven o'clock.
  • An example of the above-described lateral direction Y is the nine o'clock direction, and coincides with the first direction R.
  • a pocket 31 which extends in the fourth direction U is formed between a pair of pins 20 which are adjacent to each other in the first direction R.
  • a pocket 32 which extends in the fifth direction V is formed between a pair of pins 20 which are adjacent to each other in the second direction S
  • a pocket 33 which extends in the sixth direction W is formed between a pair of pins 20 which are adjacent to each other in the third direction T.
  • each pin 20 has the first surface 20 U which is parallel to the fourth direction U, the second surface 20 V which is parallel to the fifth direction V, and the third surface 20 W which is parallel to the sixth direction W.
  • each pin 20 has a pair of first A surfaces 20 Ua which intersect the thickness direction Z and are parallel to the fourth direction U, and a pair of first B surfaces 20 Ub which are parallel to the thickness direction Z and the fourth direction U.
  • Each of the first A surfaces 20 Ua and the first B surfaces 20 Ub is an example of the first surface 20 U.
  • each pin 20 has a pair of second A surfaces 20 Va which intersect the thickness direction Z and are parallel to the fifth direction V, a pair of second B surfaces 20 Vb which are parallel to the thickness direction Z and the fifth direction V, a pair of third A surfaces 20 Wa which intersect the thickness direction Z and are parallel to the sixth direction W, and a pair of third B surfaces 20 Wb which are parallel to the thickness direction Z and the sixth direction W.
  • Each of the second A surfaces 20 Va and the second B surfaces 20 Vb is an example of the first surface 20 V
  • each of the third A surfaces 20 Wa and the third B surfaces 20 Wb is an example of the third surface 20 W.
  • Each pin 20 includes a first body portion 22 which is formed into the shape of a hexagonal frustum and a second body portion 23 which is formed into the shape of a hexagonal prism.
  • the first body portion 22 is constituted of a pair of the first A surfaces 20 Ua, a pair of the second A surfaces 20 Va, and a pair of the third A surfaces 20 Wa.
  • the second body portion 23 is positioned further to a base end side Zb of the pin 20 than the first body portion 22 is, and is constituted of a pair of the first B surfaces 20 Ub, a pair of the second B surfaces 20 Vb, and a pair of the third B surfaces 20 Wb.
  • Each pin 20 further includes a drawing portion 21 which is positioned further to a tip side Za of the pin 20 than the first body portion 22 is, and a fillet portion 24 which is positioned further to the base end side Zb of the pin 20 than the second body portion 23 is.
  • the drawing portion 21 is formed to be tapered, and the tip of the drawing portion 21 is smoothly rounded.
  • the fillet portion 24 is smoothly extended from the second body portion 23 to the target surface 10 A.
  • the outer edge of the fillet portion 24 is formed into a hexagonal shape, and the fillet portions 24 are arranged on the target surface 10 A without any space.
  • FIG. 3 is a side view when the pins 20 arranged in the first direction R are viewed from the fourth direction U.
  • the above-described pocket 31 is formed between a pair of pins 20 L and 20 R which are adjacent to each other in the first direction R.
  • each of the pockets 32 and 33 has substantially the same shape and function as those of the pocket 31 . Accordingly, the pocket 31 will be described in detail as a representative thereof, and the duplicate description of the pockets 32 and 33 will be omitted.
  • each of the second surface 20 V which defines a gap G of the pocket 32 and the third surface 20 W which defines a gap G of the pocket 33 has substantially the same shape and function as those of the first surface 20 U which defines a gap G of the pocket 31 . Accordingly, the first surface 20 U will be described in detail as a representative thereof, and the duplicate description of the second and third surfaces 20 V and 20 W will be omitted.
  • the first surface 20 U of one pin 20 L and the first surface 20 U of the other pin 20 R face each other with the gap G formed therebetween.
  • the first A surfaces 20 Ua each constituting the hexagonal frustum face each other
  • the first B surfaces 20 Ub each constituting the hexagonal prism face each other.
  • Each pin 20 is formed such that the gap G between the first surfaces 20 U facing each other is substantially equal to the plate thickness F of the throwing star 2 at a predetermined depth D in the thickness direction Z.
  • the tip side Za of the depth D in the pin 20 is assumed to be a tip portion, and the base end side Zb of the depth D in the pin 20 is assumed to be a holding portion.
  • the gap G between the first surfaces 20 U is larger than the plate thickness F of the throwing star 2 .
  • the gap G between the first surfaces 20 U is smaller than the plate thickness F of the throwing star 2 .
  • the depth D is positioned in the first body portion 22 .
  • a portion of the first body portion 22 on the tip side Za of the depth D is assumed to be a first A body portion 22 a
  • a portion of the first body portion 22 on the base end side Zb of the depth D is assumed to be a first B body portion 22 b .
  • Each of the drawing portion 21 and the first A body portion 22 a is an example of the above-described tip portion.
  • Each of the first B body portion 22 b and the second body portion 23 is an example of the above-described holding portion.
  • the edge 41 E of the throwing star 2 formed obliquely relative to the target surface 10 A slides on the surface of the drawing portion 21 or the first body portion 22 which is also formed obliquely relative to the target surface 10 A, and the tip of the sword 41 is guided to the pocket 31 ( 32 , 33 ) between adjacent pins 20 .
  • the thickness of the throwing star 2 gradually increases from the edge 41 E toward the inside, and then becomes constant when it reaches the plate thickness F of the rubber plate.
  • the gap G between the first surfaces 20 U of the pins 20 L and 20 R gradually decreases from the tip side Za of the pin 20 toward the base end side Zb.
  • a difference between the thickness of the throwing star 2 and the gap G between the pins 20 L and 20 R decreases.
  • part of the throwing star 2 e.g., a ridge 41 D of the sword 41
  • the thickness of the throwing star 2 coincides with the gap G between the pins 20 L and 20 R.
  • the target 1 made of resin can deform reversibly.
  • the tip of the sword of the throwing star 2 widens the gap G between the pins 20 , and sticks to reach a position slightly deeper than the depth D.
  • the first A surface 20 Ua of one pin 20 L deforms along the front side 2 A of the throwing star 2 , and comes into surface contact with the front side 2 A.
  • the first A surface 20 Ua of the other pin 20 R deforms along the back side 2 B of the throwing star 2 , and comes into surface contact with the back side 2 B.
  • the flat front side 2 A and the flat back side 2 B of the throwing star 2 are supported by the flat first surfaces 20 U of the pins 20 , and hence a contact area C is large as compared with the case where the throwing star 2 is supported by cylindrical surfaces.
  • the throwing star 2 having hit the target 1 does not fall easily and is easily held in a state in which the throwing star 2 sticks in the target 1 .
  • the present embodiment is particularly suitable for a safe throwing star made of rubber. While the throwing star made of rubber is safe as compared with the throwing star made of metal, the throwing star made of rubber is light, and hence the throwing star made of rubber does not easily stick deeply in a hard support member such as clay. According to the present embodiment, even the light throwing star 2 reliably sticks deeply to reach the predetermined depth D if the throwing star 2 hits the target 1 . Consequently, the throwing star 2 having hit the target 1 does not fall easily and is easily held in the state in which the throwing star 2 sticks in the target 1 .
  • the throwing star 2 is easily held in the state in which the throwing star 2 sticks in the target 1 with the pockets 31 , 32 , and 33 which extend in the fourth to sixth directions U, V, and W not only when the throwing star 2 which rotates longitudinally in the fourth direction U hits the target 1 but also when the throwing star 2 which is shifted in the fifth direction V or the sixth direction W and rotates obliquely hits the target 1 .
  • the throwing star 2 flying toward the target 1 is often rotating longitudinally in the twelve o'clock direction.
  • the tip of the sword of the throwing star 2 is guided to the pocket 31 , the first surfaces 20 U defining the gap G of the pocket 31 come into surface contact with the front side 2 A and the back side 2 B of the throwing star 2 from both sides to hold the throwing star 2 .
  • the tip of the sword of the throwing star 2 is guided to the pocket 32 extending in the fifth direction V (ten o'clock direction), and the second surfaces 20 V of the pocket 32 come into surface contact with the front side 2 A and the back side 2 B of the throwing star 2 from both sides.
  • the third surfaces 20 W of the pocket 33 extending in the sixth direction (two o'clock direction) come into surface contact with the front side 2 A and the back side 2 B of the throwing star 2 from both sides.
  • the throwing star 2 is held by the pin 20 which deforms reversibly, and hence a paper target sheet or a support member of the paper target sheet does not become full of holes.
  • the throwing star target 1 can be repeatedly used while the pleasant appearance of the throwing star target 1 is maintained.
  • Each pin 20 includes the first and second body portions 22 and 23 each having the XY cross section formed into the hexagonal shape. Consequently, it is easy to arrange the pins 20 such that the flat surfaces 20 U, 20 V, and 20 W of the adjacent pins 20 are parallel to each other. As compared with the case where the XY cross section is triangular, a corner is not easily damaged and the pin 20 is not easily broken.
  • the XY cross section of the pin 20 may be triangular.
  • the XY cross section of the pin 20 has the shape of an equilateral triangle, similarly to the embodiment in which the XY cross section of the pin 20 is hexagonal, it is possible to hold the throwing star 2 which rotates in each of the fourth to sixth directions U, V, and W.
  • the XY cross section of the pin 20 may also have the shape of an isosceles right triangle.
  • the XY cross section of the pin 20 may be quadrangular, pentagonal, or octagonal. However, when the XY cross section is quadrangular, the pin 20 can come into surface contact with the throwing star 2 only from two directions including longitudinal and lateral directions. When the YX cross section is pentagonal, it is difficult to arrange the pins without any space. When the XY cross section is octagonal or has a shape having nine or more sides, each surface becomes small and the contact area is reduced. Accordingly, the XY cross section of the pin 20 preferably has the hexagonal shape shown in FIG. 2 .
  • first and second body portions 22 and 23 shown in FIG. 1 may be omitted, or a third body portion and a fourth body portion each having the shape of a hexagonal frustum having an inclination angle different from that of the first body portion may be further provided.
  • the drawing portion 21 serves as the tip portion
  • the second body portion 23 serves as the holding portion.
  • the throwing star 2 may be configured so as to be held by the target 1 at a portion of a blade between the edge 41 E and the ridge 41 D instead of the ridge 41 D of the sword 41 .
  • the gap G between the pins 20 L and 20 R at the predetermined depth D may be appropriately set to be equal to the thickness of the blade of the throwing star 2 which is smaller than the plate thickness F of the throwing star 2 .
  • the board 10 may be three-dimensional. When the roughness of the target surface 10 A relative to the size of the pin 20 is negligibly small, a surface of a life-sized ninja doll or the like may be configured as the target surface 10 A.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US17/054,289 2018-05-11 2019-06-19 Throwing star target Abandoned US20210239438A1 (en)

Applications Claiming Priority (3)

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JP2018-092075 2018-05-11
JP2018092075A JP7057209B2 (ja) 2018-05-11 2018-05-11 手裏剣の的
PCT/IB2019/055138 WO2019215710A1 (ja) 2018-05-11 2019-06-19 手裏剣の的

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JP (1) JP7057209B2 (ja)
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