JP3160281U - Darts blade structure - Google Patents

Abstract

A dart blade structure that ensures dart straightness and propulsion and prevents dart rotation is provided. A dart blade structure having two blades inserted into a groove at the rear of the shaft, the groove having a throttle X-shaped insertion port, and two sheets from the insertion port. The left side formed by two blades in an acute angle space between the upper blade piece formed by the two blades and the lower blade piece when the blades are cross-mounted. Between the blade pieces located on the right side and between the blade pieces located on the right side form an obtuse angle space. [Selection] Figure 1

Description

  The present invention relates to a dart blade structure configured to prevent dart rotation.

  Conventionally, various structures have been proposed for the blade structure of a dart that can prevent the dart from rotating (the straight movement of the dart).

  An example of this is a structure in which the radially outer end portion of a blade (fin) is bent and a bent end piece is formed in the longitudinal direction (axial direction of the dart), and this bent end piece is used. It is intended to generate rotational force and propulsive force. Regarding this structure, “Throwing and catching toy” of Japanese Utility Model Publication No. 52-39267 (Reference 1), “Hiya” of Japanese Utility Model Publication No. 7-16784 (Reference 2), or “ "Practice kite" (Reference 3).

  As another structure, the blade is twisted in the axial direction, and a rotational force and a propulsive force are generated by using the twist of the blade as a structure in which the base end portion and the open portion of the blade are biased with respect to the shaft core. I intend to. Regarding this structure, there is "Throwing tool" (Reference 4) of JP-A-7-328158.

Japanese Utility Model Publication No. 52-39267 No. 7-16784 Special table 2000-510025 JP-A-7-328158

  Documents 1 to 3 described above have a structure in which a radial end portion of a blade provided in a cross shape is bent on the end surface of the rear portion of the shaft to form a bent end piece. Therefore, it is considered that a rotational force is generated. However, it cannot be considered as a structure that catches the wind at the time of throwing and guarantees throwing along a straight flow. Therefore, it is considered that the darts can not go straight in the flight direction and throw in the direction desired by the competitor.

  In Reference 4, the structure is intended to ensure a flight distance, reduce air resistance, and the like by randomly capturing the wind flow when throwing. However, the screw part of the main body captures and rectifies the flow of the wind in a spiral shape, and throws along a straight flow and straightness in the flight direction of the darts as in References 1 to 3 above. And the throwing in the direction that the athlete wants is not necessarily considered sufficient.

  According to the first aspect of the present invention, there is an acute angle space between the upper blade piece formed by the two blades and the lower blade piece, and the left side formed by the two blades. The blade structure of the dart is configured to form an obtuse angle space between the blade pieces located on the right side and between the blade pieces located on the right side, ensuring dart straightness and propulsive force, By securing the driving force, it is intended that even amateurs can perform throwing happily. Further, the invention of claim 1 uses a structure in which two blades are inserted and supported in a slit having an X-shaped insertion port, and the resistance of the two blades to wind is improved. It is intended to reduce damage.

Claim 1 is a dart blade structure comprising a tip provided at the front portion of the shaft, a groove provided at the rear portion of the shaft, and two blades inserted into the groove,
The kerf has a structure having an X-shaped insertion port formed by narrowing an X-shape on the end face of the rear portion, and the two blades are crossed (a diaphragm X-shaped shape) using the insertion port. When mounted in a cross), the blades have an X-shaped aperture, and when viewed from the rear part of the shaft, the blades are positioned between the blade pieces located on the upper side formed by the two blades and on the lower side. A dart blade with a configuration in which the space between the blade pieces is an acute angle space, and between the blade pieces located on the left side formed by the two blades and between the blade pieces located on the right side forms an obtuse angle space. It is a structure.

  The invention of claim 2 achieves the object of claim 1 and makes it easy to ensure the dart's straightness and propulsive force, so that it can be thrown into the desired target and can be thrown even by amateurs. suggest.

Claim 2 is the dart blade structure according to claim 1,
The two blades are bent in the axial direction to form bent end portions, and the bent end portions located on the left and right sides of the respective blades are parallel and positioned on the upper and lower sides of the blades. This is a dart blade structure in which bent end portions are positioned on the same fold line.

  The invention of claim 3 achieves the object of claim 1, secures the darts' straightness and propulsive force, and prevents the darts from rotating. However, we propose a structure that can be thrown in happily.

Claim 3 is the dart blade structure according to claim 1,
The dart blade structure is configured such that the two blades are provided in an X-shaped aperture using a cut groove having the X-shaped aperture so that the dart can be prevented from rotating.

The invention of claim 1 is a dart blade structure comprising a tip provided at the front portion of the shaft, a groove provided at the rear portion of the shaft, and two blades inserted into the groove,
The kerf is a structure having an X-shaped insertion port formed by drawing an X-shape on the rear end face, and when the two blades are crossed and installed using the insertion port, the blade is When viewed from the rear part of the shaft, it has an acute angle space between the blade pieces located on the upper side and the blade pieces located on the lower side when viewed from the rear part of the shaft. This is a dart blade structure in which an obtuse angle space is formed between a blade piece located on the left side formed by a single blade and between a blade piece located on the right side.

  Accordingly, the first aspect of the present invention provides an acute angle space between the upper blade piece formed by the two blades and the lower blade piece, and the left side formed by the two blades. The blade structure of the dart is configured to form an obtuse angle space between the blade pieces located on the right side and between the blade pieces located on the right side, ensuring dart straightness and propulsive force, By securing the driving force, even amateurs can perform throwing happily. In addition, this claim 1 uses a structure in which two blades are inserted and supported in a kerf having an X-shaped insertion port, thereby improving the resistance of the two blades to wind and preventing damage. There is a profit that can be reduced.

The invention of claim 2 is the dart blade structure according to claim 1,
Two blades are bent in the axial direction to form bent ends, the bent ends located on the left and right sides of each blade are parallel, and the bent ends located on the upper and lower sides of each blade This is a dart blade structure in which parts are located on the same fold line.

  Therefore, claim 2 achieves the object of claim 1 and makes it easy to ensure the straightness and propulsion of the dart so that it can be thrown into the desired target and can be thrown even by an amateur. Can make a suggestion.

The invention of claim 3 is the dart blade structure according to claim 1,
This is a dart blade structure in which two blades are provided in an X-shaped aperture using a cut groove exhibiting an X-shaped aperture, and the dart can be prevented from rotating.

  Therefore, claim 3 achieves the object of claim 1, secures dart straightness and propulsion, and prevents the dart from rotating, so that the target can be thrown into the target. However, it is possible to propose a structure that allows for fun throwing.

Whole perspective view of the dart showing the first embodiment Overall plan view of the dart showing the first embodiment End view of the dart showing the first embodiment Whole perspective view of the dart showing the second embodiment Overall plan view of the dart showing the second embodiment End view of the dart showing the second embodiment Schematic of throwing, showing the dart and target of the present invention

  In the figure, reference numeral 1 denotes a shaft of a dart A. A tip 2 is provided at the tip 1a of the shaft 1, and two blades 3, 3 (blade 3) are provided at the rear portion 1b of the converged shape (tip shape of the writing instrument). The cross-shaped kerfs 5 and 5 (referred to as the kerf 5) are provided in two strips described in detail below.

  As shown in FIG. 3 or FIG. 6, the kerf 5 forms an insertion port 501 of an X-shaped drawing 500 in which an X-shaped drawing is formed on the end surface 100 of the rear portion 1 b of the shaft 1. The tip of the blade 3 is inserted into the insertion port 501 from the insertion port 501, and the tip of the blade 3 is brought to the bottom 502 of the kerf 5. With this insertion operation of the blade 3, as shown in FIGS. 2 and 4, approximately ３ of the axial direction A <b> 1 of the blade 3 is inserted into the kerf 5 and set (fixed). Thereby, it is considered that the front part of the blade 3 is fixed, so that the linearity is supported by receiving the wind in the throwing direction of the shaft 1, and the rear part is given a degree of freedom. At the same time, it is considered that propulsive force is supported by the shaking motion.

  The shape of the blade 3 having the above structure will be described in more detail with reference to FIGS. 1 to 3 showing the first embodiment. The kerf 5 has an insertion port 501 of an X-shaped aperture 500. The blade 3 is attached using this insertion port 501. When the attached blade 3 is viewed from the rear portion 1b of the shaft 1, there is an acute angle space between the blade pieces 300 located on the upper side 3a formed by the blades 3 and between the blade pieces 301 located on the lower side 3b. In addition, the obtuse angle space Z is formed between the blade piece 302 located on the left side 3c formed by two blades and between the blade piece 303 located on the right side 3d. As described above, the features that make up the acute angle space Y and the obtuse angle space Z can ensure the straightness and propulsive force of the darts, and it is fun even for amateurs to secure the straightness and propulsive force. It is possible to perform throwing. Further, the second embodiment will be described in more detail with reference to FIGS. 4 to 6. The structure of the kerf 5 is the same as that of the first embodiment described above, but there is a difference in the structure of the blade 3. Each blade 3 is bent in the axial direction A1 of the dart A to form bent end portions 304 to 307, and the bent end portions 304, 305, or 306 of the upper and lower sides 3a and 3b of each blade 3 are formed. In 307, the bent end portions 304, 305 or 306, 307 on the upper and lower sides 3a, which are adjacent to each other on the left and right sides, become parallel O. Further, at the bent end portions 304, 305, or 306, 307 of the upper and lower sides 3a, 3b (left and right sides 3c, 3d) of each blade 3, the bent end portions 304, 305, or Reference numerals 306 and 307 denote configurations located on the same fold lines P1 and P2. Therefore, in the second embodiment, it is considered that the characteristics of the first embodiment can be surely achieved. In addition, the characteristic of this 2nd Example can be exhibited by making the bending dimension of these bending edge parts 304-307 into about 1/4 of radial direction A2 (radial direction A2 of darts A) of blade 3. .

  In the figure, reference numeral 6 denotes a target, and FIG. 7 shows a state in which the person H throws (game) toward the target 600 segment 600.

1 Shaft
1a ahead
1b rear
100 end face
2 chips
3 feathers
3a upper side
3b lower side
3c left side
3d right side
300 feather pieces
301 blade
302 blade
303 blade
304 Bending edge
305 Bending edge
306 Bending edge
307 bent end
5 kerf
500 Aperture X shape
501 outlet
502 bottom
Six
600 segments
A dart
A1 axial direction
A2 Radiation direction
H people
Y acute angle space
Z obtuse angle space
О Parallel
P1 bending line
P2 bending line

Claims (3)

A dart blade structure comprising a tip provided at the front of the shaft, a kerf provided at the rear of the shaft, and two blades inserted into the kerf,
The cut groove has a structure having an X-shaped insertion port formed by drawing an X-shape on the end face of the rear portion, and when the two blades are mounted by crossing using the insertion port In addition, this blade has an X-shaped aperture, and when viewed from the rear part of the shaft, there is an acute angle between the blade piece located on the upper side formed by the two blades and between the blade piece located on the lower side. A dart blade structure configured such that an obtuse angle space is formed between a blade piece located on the left side formed by the two blades and between a blade piece located on the right side. The dart blade structure according to claim 1,
The two blades are bent in the axial direction to form bent end portions, and the bent end portions located on the left and right sides of the respective blades are parallel and positioned on the upper and lower sides of the blades. A dart blade structure in which folding end portions are positioned on the same folding line. The dart blade structure according to claim 1,
A dart blade structure in which the two blades are provided in an X-shaped aperture using a cut groove having the X-shaped aperture to prevent rotation of the dart.

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