CN2612423Y

CN2612423Y - Sheet-type dart with reverberatory force

Info

Publication number: CN2612423Y
Application number: CN 03203426
Authority: CN
Inventors: 陈英俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-25
Filing date: 2003-02-25
Publication date: 2004-04-21
Anticipated expiration: 2013-02-25

Abstract

The utility model relates to a sheet gyroscopic force dart, comprising a body of sheet which is provided with a center portion and a plurality of spiral arms. Each spiral arm is provided with a root-arm segment and a wing-arm segment. The root-arm segment extends outward from the peripheral center portion with certain angle. The wing-arm extends outward from the root-arm with a certain angle, and simultaneously a hem is formed along the direction of the end which is away from the center portion. The hem separates the wing-arm segment into a flat area parallel to the flying direction and a slant area which forms an angle and creates flotage. The extending direction of the hem does not pass the barycenter of the center portion, and the flat area is arranged on the same plane with the root-arm segment and the center portion. Thereby, the position, where the biggest flotage is created, is a certain distance apart from the barycenter, and the flying height and the radii of the flying circle can be adjusted.

Description

The thin plate Hili dart

[technical field]

The utility model relates to a kind of thin plate Hili dart.

[background technology]

The offline mode that can turn back after " Hili dart " flies out, make Hili dart become a kind of recreation, sports events that the consumer likes that quite be subjected to, consult Fig. 1, Fig. 2, Fig. 3, with the general double-arm Hili dart 5 and the Hili dart 6 of three arm type is example, consist predominantly of two

arm

51,52 and three arms 61 that circle round that circle round, and the angle of every

adjacent arm

51,52,61 that circles round is spent less than 140, and has the trailing edge 512,522,612 of a thicker leading edge of a thickness 511,521,611 and a thinner thickness.

Although Hili dart different its interest in the design of external form at present on the market, basically, by the cross section of the arm that circles round all just like wing profile.Whereby, could be with the special construction (as wing profile) of the

arm

51,52,61 that circles round, air is flowed through circle round

arm

51,52,61 leading edges 511,521,611 and trailing edge 512,522,621 o'clock, according to bernoulli principle, produce buoyancy upwards, and continue to turn eventually to turning back in the back that flies out.Roughly, the flight phenomenon of Hili dart 5,6 is relevant with physical principles such as moment, angular momentum, revolution inertia and Bai Nuli principles, discusses no longer deeply in this.But above-mentioned Hili dart 5,6 is circling round when flight, still has following disappearance and needs to be resolved hurrily:

Because this arm 51 that circles round, 52,61 must have enough thickness, could produce enough buoyancy with wing profile, therefore, no matter Hili dart 5,6 material is timber or plastics, all has suitable thickness and weight, generally speaking, Hili dart 5,6 flying radius is directly proportional with its revolution inertia, therefore, under the heavier situation of quality, the relative flying radius that also can make becomes big, so, existing Hili dart 5,6 mostly need quite spacious place just can lose throws, and is not suitable for narrow space, and Hili dart 5,6 in order to prevent distortion, the material of selecting for use is harder, the impulsive force that produces is also quite big, if hit human body accidentally, is easy to damage.

Consult Fig. 4, Fig. 5, in order to improve above-mentioned disappearance, other has a kind of Hili dart made from thin plate 7, and only flying radius is too little because of the inertia deficiency for 7 of this Hili darts, and the dull no change of flight path, is difficult to attract consumer's interest.

[utility model content]

The purpose of this utility model is to provide a kind of thin plate Hili dart of regulating flight path height and flight circulation radius size.

Based on above-mentioned purpose, the utility model provides a kind of thin plate Hili dart, it is characterized in that it includes:

One thin plate body, this thin plate body comprises:

One central part, this central part have a center of gravity that is positioned at the center; And

Several spiral arms, each spiral arm has an arm section and a wing arm section, this root arm section is to be radial equal angles consubstantiality by this central part periphery to stretch out, this wing arm section is to be an angle consubstantiality by this root arm section tail end to stretch out, and form one by the flanging that extends along its length direction away from an ora terminalis of this central part, this flanging is separated into this wing arm section one plane area parallel with heading and forms the beveled region that the angle of attack produces buoyancy, and the bearing of trend of this flanging is the center of gravity by this central part, and this plane area and root arm section, central part are in the same plane.Whereby, make the orientation and the center of gravity that produce maximum buoyancy have an amount of bias, and the climbing ability can be with the flight of the size adjustment of amount of bias the time, can design and manufacture various types ofly rise suddenly, slowly rise, flat flying or the thin plate Hili dart of underriding type, and length, width and angle of attack angle that can beveled region be regulated the circulation radius that flies.

Described thin plate Hili dart is characterized in that: this thin plate body preferably has three spiral arms.

Described thin plate Hili dart is characterized in that: each wing arm section can have a leading edge and a trailing edge, and this flanging is near this trailing edge.

Described thin plate Hili dart is characterized in that: this thin plate body central part also can be provided with a perforation.

Described thin plate Hili dart is characterized in that: the perforation of this thin plate body can be circle.

Conclude above-mentionedly, thin plate Hili dart of the present utility model is real to have had following listed advantage and effect:

1. because the utility model is with the flanging 222 bending and moldings generation buoyancy of thin plate body 1 along wing arm section 22, alternative general timber or plastics are complex-curved with wing profile, not only make easily, can significantly reduce manufacturing cost, and in light weight, hit human body and also be unlikely and damage.

And the utility model can be according to the selected suitable amount of bias III of lamella thickness, material proportion, regulate the flying height of thin plate body 1, reach length, width and angle of attack θ 2 angular adjustment flight circulation radius with beveled region 226, design and manufacture various rise suddenly, delay liter, flat flying or the thin plate Hili dart of underriding type, so, be applicable to spacious place, also can fly, and can promote the entertainment effect that uses in narrow space.

3. though once there was the dealer to adopt the method for amount of bias control flying height in the past, but all be to be used in the Hili dart (as Fig. 2) that wing body section is the wing profile shape, only the Hili dart of this wing profile has Heavy Weight, the bigger need of flying radius and disappearance such as ward is arranged as described above, and the utility model with maximum buoyancy orientation biasing with utilize flanging 222 and angle of attack θ 2 to produce buoyancy and be used for the design of one, then unprecedented, not only in light weight, and offline mode has more variability, can meet consumer's all kinds of different demands.

[description of drawings]

Below by most preferred embodiment and accompanying drawing thin plate Hili dart of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is existing general double-arm Hili dart stereogram.

Fig. 2 is the vertical view of existing general three arm type Hili dart.

Fig. 3 is a cutaway view along Fig. 2 straight line 3-3, and the arm section that circles round of this three arm type Hili dart is described.

Fig. 4 is the vertical view of existing another kind of thin plate Hili dart.

Fig. 5 is a cutaway view along Fig. 4 straight line 5-5, and the section of this thin plate Hili dart is described.

Fig. 6 is the vertical view of a preferred embodiment of the utility model thin plate Hili dart.

Fig. 7 is the cutaway view along the straight line 7-7 among Fig. 6.

Fig. 8 is a schematic diagram, produces the situation of amount of bias when this preferred embodiment flight is described.

Fig. 9 is a schematic diagram, illustrates that losing of this preferred embodiment throw situation.

Figure 10 is the vertical view of another preferred embodiment of the utility model.

[specific embodiment]

As Fig. 6, Fig. 7, the preferred embodiment of thin plate Hili dart of the present utility model is to comprise: a thin plate body 1 (right hand is thrown boomerang).

This thin plate body 1 is to make with the thin plate below the 2mm, and has a central part 10 and three spiral arms 20.

This central part 10 has a center of gravity 11 that is positioned at the center.

Each spiral arm 20 has an arm section 21 and a wing arm section 22.This root arm section 21 is to be radial equal angles consubstantiality by these central part 10 peripheries to stretch out.This wing arm section 22 is to be antecurvature angle theta 1 an angle consubstantiality by these root arm section 22 tail ends respectively to stretch out, and have an ora terminalis 221 away from central part 10, and form one by flanging 222, a leading edge 223 and the trailing edge 224 of ora terminalis 221 along its length direction extension.The angle of this angle theta 1 is less than 180 degree.This flanging 222 with this wing arm section 22 be separated into one with the parallel plane area 225 of heading (as the direction of Fig. 7 arrow I), and formation angle of attack θ 2 produces the beveled region 226 of buoyancy, and this flanging 222 is near this trailing edge 224, the bearing of trend that makes flanging 222 is the center of gravity 11 by this central part, and plane area and root arm section 21, central part 10 are in the same plane.

Whereby, consult Fig. 7, Fig. 8, Fig. 9, the user need only grip the plane area 225 of wing arm section 22 with hand, and get rid of forward and throw thin plate body 1, thin plate body 1 is flown out forward by the direction of arrow I, and follow the direction rotation of arrow II, and continue to turn eventually to turning back in the back that flies out.Because the utility model is not to utilize the Bai Nuli principle to produce buoyancy, below promptly at the flight phenomenon and physical principles such as moment, angular momentum, revolution inertia of this case, the more plain mode of usefulness is understood.

At first, when to get rid of near vertical direction (shaft parallel is in ground) when throwing thin plate body 1, the special construction of this wing arm section 22, can be because of the angle of attack θ 2 of beveled region 226, make air-flow form thrust to beveled region 226 1 sides, then be transformed into buoyancy at beveled region 226 opposite sides, buoyancy direction (watching by losing the person of throwing) is from right to left.And because the buoyancy of wing arm section 22 speed above center of gravity 11 higher (preceding fly to add revolution) generation is bigger, the buoyancy that speed lower (preceding fly to subtract revolution) produces below center of gravity 11 is less, this buoyancy difference can form moment loading in thin plate body 1, impels thin plate body 1 toward turning left.Simultaneously, respectively whether this wing arm section 22 also can thanks for your hospitality the factor that miscarriage is given birth to because of at center of gravity 11 the place aheads and center of gravity 11 rears, causes the difference of buoyancy; Generally speaking, buoyancy more greatly in the time of forwardly, buoyancy is less in the wings the time, and the formed moment of the difference of forward and backward side's buoyancy can be impelled thin plate body 1 down tilt of turning right.Therefore, when thin plate body 1 is turned in circling round, also can after rising to peak, waft back, so the flight circulation radius of this thin plate body 1 is directly proportional with its revolution inertia, and is inversely proportional to buoyancy because of the down tilt of turning right gradually climbs with remaining revolution inertia.

According to above-mentioned, because producing the orientation and the center of gravity 11 of maximum buoyancy, the utility model has an amount of bias III (as Fig. 8), this amount of bias III can reduce the moment of thin plate body 1 front and back buoyancy difference, therefore, the flying height that just can regulate thin plate body 1 by the size that changes amount of bias III, reach length, width and angle of attack θ 2 angular adjustment flight loop radius, design and manufacture various rise suddenly, delay liter, flat flying or the thin plate Hili dart of underriding type with beveled region 226.And the utility model is to make with thin plate, revolution inertia is less, only need less buoyancy that thin plate body 1 is turned, and the structural strengthening effect that flanging 222 produces also helps to reduce lamella thickness, even the flexible thin plate of tool also can adopt slightly, integrate above-mentioned factor, make the utility model lighter safer.

Consult Figure 10, the center of this thin plate body 1 central part 10 also can dispose the perforation 12 of a circle.Whereby, except reducing the weight, also can make Mass Distribution in perforation 12 outsides, the stability when improving revolution, and perforation is not limited to circle also can have style such as square, triangle to change.

In addition, this thin plate body 1 also can dispose four spiral arms, whereby, can regulate flight path height, flight circulation radius size equally, and have advantages such as in light weight, safer.

Claims

1, a kind of thin plate Hili dart is characterized in that it includes:

One thin plate body, this thin plate body comprises:

Several spiral arms, each spiral arm has an arm section and a wing arm section, this root arm section is to be radial equal angles consubstantiality by this central part periphery to stretch out, this wing arm section is to be an angle consubstantiality by this root arm section tail end to stretch out, and form one by the flanging that extends along its length direction away from an ora terminalis of this central part, this flanging is separated into a plane area parallel with heading with this wing arm section and forms the beveled region of the angle of attack, and the bearing of trend of this flanging is the center of gravity by this central part, and this plane area and root arm section, central part are in the same plane.

2, thin plate Hili dart as claimed in claim 1 is characterized in that: this thin plate body has three spiral arms.

3, thin plate Hili dart as claimed in claim 1 is characterized in that: each wing arm section has a leading edge and a trailing edge, and this flanging is near this trailing edge.

4, thin plate Hili dart as claimed in claim 1 is characterized in that: this thin plate body central part is provided with a perforation.

5, thin plate Hili dart as claimed in claim 4 is characterized in that: the perforation of this thin plate body is for circular.