KR20050093834A - Fishing rod - Google Patents

Abstract

A fishing rod formed of a fiber- reinforced resin material capable of producing the excellent state of the rod in the same manner as in a fishing rod manufactured of a natural material, wherein, in a coordinate having the overall length plotted on one axis thereof and the resonance frequency plotted on the other axis thereof, the resonance frequency comes within the range of 1.5 to 2.2 Hz when the overall length is 2400 mm, 1.4 to 1.8 Hz when the overall length is 2700 mm, 1.1 to 1.6 Hz when the overall length is 3000 mm, 0.9 to 1.6 Hz when the overall length is 3300 mm, 0.9 to 1.5 Hz when the overall length is 3600 mm, and 0.9 to 1.4 Hz when the overall length is 3900 mm.

Description

Fishing rod {FISHING ROD}

The present invention relates to a fishing rod, in particular carbon fiber, wherein the fishing rod consists of a fiber-reinforced resin in which a synthetic resin is impregnated into a reinforcing fiber such as glass fiber.

Many fishing rods of myopia are composed of a fiber reinforced resin material in which synthetic resin is impregnated into a reinforced fiber such as carbon fiber or glass fiber. By using such a material, weight reduction, physical strength improvement, etc. are aimed at. In addition, the fishing rod is considered to be important for flexibility, rigidity, resilience, and the like for operability at the time of feeding the fish and collecting fish. Therefore, by adjusting the thickness and thickness of the fishing rod, the characteristics of the fishing rod (strand bending) are produced. For example, a technique of winding while partially stacking a fiber reinforced resin material for producing a pole (see, for example, Japanese Unexamined Patent Application Publication No. 2002-209477, Fig. 2), Techniques for winding a fiber-reinforced resin material having different elasticities in the axial direction (for example, JP-A-11-289925, see FIG. 2) and the like have been proposed.

Many fishing rods are made of fiber-reinforced resin materials to adjust the rigidity and warpage, but they do not yet fully satisfy the needs of anglers. In particular, the "fish rod" is considered to be the most important element in rice cake fishing rods used for rice cake fishing, and the fishing rod made of natural bamboo is considered to be the most outstanding pole bird. The rice cake fishing rod made of fiber-reinforced resin is evaluated to fall short of the pole's bending to the rice cake fishing rod made of natural bamboo.

However, a fishing rod made of such a natural material is difficult to uniformly mass-produce due to the material, and is expensive and complicated to clean. Moreover, since the fishing rod which consists of this kind of natural material produces | generates the outstanding "long pole bend" by a skilled worker, it is also difficult to industrially mass-produce.

Therefore, in the fishing rod which consists of artificial fiber reinforced resin material, it is continuing to produce | generate the long bending which does not differ from the fishing rod which consists of a natural material.

An object of the present invention is to provide a fishing rod made of a fiber-reinforced resin material capable of producing a good long bending such as a fishing rod made of a natural material.

1 is an overall view of a fishing rod employing one embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the squadron 2 of FIG. 1.

3 is a diagram illustrating a manufacturing process of the pole.

4 is a view showing a measurement state of the resonant frequency of the fishing rod in the present invention.

It is a figure which shows the measuring aspect of the rigidity of a fishing rod in this invention.

6 is a reference diagram in a finite element model.

7 is a reference diagram in a link model.

As a result of repeated researches in view of the above problems, the inventors found that the most important factor that the angler feels as a "pole bend" is in the resonance vibration of the fishing rod. This invention is based on this knowledge.

That is, the relationship between the total length of the fishing rod and the first resonant frequency of the fishing rod is 1.5 to 2.2 Hz when the total length is 2400 mm, 1.4 to 1.8 Hz when the total length is 2700 mm, and 1.1 when the total length is 3000 mm. It is set in the area enclosed by each point which is 0.9 to 1.6Hz when the total length is 3300mm, 0.9 to 1.5Hz when the total length is 3300mm, and 0.9 to 1.4Hz when the total length is 3900mm. . This area is an area shown in Table 1 below.

By setting the primary resonant frequency within a predetermined range for each full length of the fishing rod, it is possible to produce an excellent "pole bend" like a fishing rod composed of natural bamboo.

The "first-order resonant frequency" here is the frequency of the fishing rod measured by the following method. First, the range of 80 mm is pinched and fixed with the clamping body from the rod base end side edge part of a fishing rod, and a fishing rod is hold | maintained in the horizontal direction. Vibration is applied to the fishing rod from the vibrator through this clamping body (frequency of the fishing rod). Acceleration in this exciter is detected by an acceleration sensor, and it is set as input acceleration A. FIG. On the other hand, the acceleration at the position of 180 mm from the rod end end side of a fishing rod is detected with an acceleration sensor, and it is set as the output acceleration B (refer FIG. 4). Then, the ratio of B / A is plotted against the frequency of the fishing rod, and the frequency of the state in which the ratio of this B / A is peaked (resonant vibration state) is sequentially determined from the smaller frequency of the fishing rod. It was set as the 2nd resonance frequency. An example of the graph which plotted this B / A ratio with respect to the frequency of a fishing rod is shown below (In addition, this graph is an example and is not based on the content of this invention directly).

The frequencies when the peaks are sequentially turned from the left side of the graph are the first, second and third resonant frequencies sequentially.

In this region, the rod has a total length of 8 characters (2400 mm) and the rod has a primary resonance frequency of 1.5 to 2.2 Hz, and the rod has a total length of 9 characters (2700 mm) and a rod primary resonance frequency of 1.4 to 2.2 Hz. Fishing rod in the range of 1.8 Hz, the total length of 10 characters (3000 mm), the first resonant frequency of the rod fishing rod in the range of 1.1 to 1.6 Hz, total length 11 characters (3300 mm), the first resonance of the rod Fishing rod with frequency range from 0.9 to 1.6Hz, total length 12 characters (3600mm), fishing rod with primary resonant frequency range from 0.9 to 1.5Hz, total length 13 character (3900mm) and fishing rod Also included are fishing rods each having a primary resonant frequency in the range of 0.9 to 1.4 Hz.

In addition, this "8 character (2400 mm)" is a concept set with a fixed width on manufacture or custom. Therefore, this "8 characters" may actually be about 2370 mm-2490 mm in length. Similarly, the "9 characters" to "13 characters" are set to have a constant width in manufacturing or custom.

Further, in the coordinate axis in which the total length of the fishing rod and the secondary resonance frequency of the fishing rod are defined as the total length of one axis and the resonant frequency of the other axis, when the total length is 2400 mm, 5.2 to 7.3 Hz and the total length are 2700 mm. 4.5 to 6.3 Hz, 4.3 to 5.6 Hz for the total length of 3000 mm, 3.7 to 5.6 Hz for the total length of 3300 mm, 3.5 to 5.3 Hz for the total length of 3600 mm, and 3900 mm for the total length of Set within the area enclosed by each point of 3.5 to 4.9Hz. This area is an area shown in Table 3 below.

By setting the secondary resonant frequency within a predetermined range for each full length of the fishing rod, it is possible to produce an excellent "pole bend" like a fishing rod composed of natural bamboo. In addition, the "secondary resonance frequency" here is a 2nd-order resonance frequency in the frequency obtained by the above-mentioned measuring method.

In this area, the rod has a total length of 8 characters (2400 mm) and the rod has a secondary resonance frequency in the range of 5.2 to 7.3 Hz, the rod has a total length of 9 characters (2700 mm) and the rod has a secondary resonance frequency of 4.5 to Fishing rod in the range of 6.3 Hz, with a total length of 10 characters (3000 mm) and a secondary resonance frequency of the fishing rod. Fishing rod in the range of 4.3 to 5.6 Hz with a total length of 11 characters (3300 mm) and a secondary resonance of the rod. Fishing rods with a frequency range of 3.7 to 5.6 Hz, a total length of 12 characters (3600 mm) and a rod with a secondary resonant frequency of 3.5 to 5.3 Hz, a total length of 13 characters (3900 mm) and a rod The rods in the second resonant frequency range from 3.5 to 4.9 Hz are also included.

Further, in the coordinate axis in which the total length of the fishing rod and the third resonant frequency of the fishing rod are defined as the total length of one axis and the resonance frequency of the other axis, when the total length is 2400 mm, the total length is 11.6 to 15.4 Hz and the total length is 2700 mm. In the case of 10.5 ~ 13.4Hz, 9.4 ~ 12.1Hz when the total length is 3000mm, 8.5 ~ 12.0Hz when the total length is 3300mm, 8.5 ~ 11.2Hz when the total length is 3300mm, 8.5 ~ 11.2Hz and the total length is 3900mm Set within the area enclosed by each point of 8.2 to 10.5Hz. This area is an area shown in Table 4 below.

By setting the third resonant frequency within a predetermined range for each full length of the fishing rod, it is possible to produce an excellent "pole bend" like a fishing rod composed of natural bamboo. In addition, the "third resonant frequency" here is a 3rd resonant frequency in the frequency obtained by the measuring method mentioned above.

In this region, the rod has a total length of 8 characters (2400 mm) and the rod has a third resonant frequency of 11.6 to 15.4 Hz, and the rod has a total length of 9 characters (2700 mm) and a rod has a third resonance frequency of 10.5 to Rod in the range of 13.4 Hz, with a total length of 10 characters (3000 mm) and a third resonant frequency of the rod. Rod with a total length of 11 characters (3300 mm) in a range of 9.4 to 12.1 Hz. Rod with a frequency range of 8.5 to 12.0 Hz, with a total length of 12 characters (3600 mm) and a rod with a third resonant frequency of 8.5 to 11.2 Hz, with a total length of 13 characters (3900 mm), with a rod The rods in the third resonant frequency range from 8.2 to 10.5 Hz are also included.

Hereinafter, a fishing rod employing one embodiment of the present invention will be described.

(Structure of rice cake fishing rod)

This fishing rod is a rice cake fishing rod used for rice cake fishing. As shown in FIG. 1, it consists of three poles, a slit 1, a squadron 2, and a repair stand 3 sequentially from a handle side. These poles are formed by firing a prepreg material in which reinforcing fibers such as carbon fiber or glass fiber are impregnated with a synthetic resin. As will be described later in detail, partially high specific weight prepregs are also laminated. Each of these poles is painted by imitating the appearance of natural bamboo, and for example, may be three-dimensionally coated with a bark of a bamboo, a cadastrum, and the like (see Fig. 2).

Each pole is sequentially connected by what is called a so-called lineage type, for example, the pole base end side part of the pole 2 is partially inserted and connected to the waterline side edge part of the far pole 1. However, the method of connecting the poles is not limited to a military system, but a well-known technique (e.g., pull-out, in-long joint form (extrudes a portion of one end of the joint) It is also possible, of course, to pit a part of the other end. Moreover, the grip 4 formed by winding the string body impregnated with urethane resin etc. is provided in the pole base end side edge part of the base 1, and the fishing line latch 5 is attached to the water line side edge part of the repair pole 3; It is equipped with a tool. In addition, the length of the rice cake fishing rod when these three poles are connected one by one becomes 9 characters (2700 mm).

Next, in FIG. 2, the structure of the pole which comprises this rice cake fishing rod is demonstrated to the middle 2 as an example.

The main body 2 is the main layer 11, the weight layer 12 laminated | stacked in the fixed range of the axial direction as the outer peripheral layer of the main layer 11, these main layers 11, and the weight layer 12. It has a coating layer 13 laminated | stacked on the circumferential surface of the.

The main layer 11 is a layer formed by laminating a prepreg material. The prepreg material may be laminated with the same thing or with different kinds of ones. For example, a prepreg material impregnated with an epoxy resin is oriented in a tape form so that the carbon fibers are oriented in a direction having a predetermined angle from the circumferential direction to the circumferential direction, or the carbon fiber is oriented in the axial direction to impregnate the epoxy resin. The thing which processed the prepreg material made into the sheet form etc. can be illustrated.

The weight layer 12 is composed of a high specific gravity prepreg material having a large specific gravity. The high specific gravity prepreg material is, for example, impregnated with an epoxy resin in a glass scrim and further mixed with a metal powder such as tungsten. And this high specific gravity prepreg is 500 ~ 600g / m ² , thickness of 0.100 ~ 0.150mm. The high specific gravity prepreg material is laminated on the above-described main layer 11 at a predetermined axial position obtained by calculating as described below.

The coating layer 13 is formed by apply | coating synthetic resin ceramic materials, such as an epoxy resin and a urethane resin. The level difference between the main layer 11 and the weight layer 12 is eliminated by the paint layer 13. In addition, as shown in FIG. 2, when forming the bark of a bamboo, etc. so that the squadron 2 may have an external appearance like natural bamboo, the prepreg material may be partially wound, or the epoxy resin may be thickly applied in part. It cuts into a predetermined shape, and forms a node of a bamboo. Incidentally, other poles have different diameters and the like, but the same structure is omitted.

(Manufacturing method of rice cake fishing rod)

Next, the manufacturing method of this rice cake fishing rod is demonstrated. For example, the case where the total length is 2700 mm and the second resonant frequency is set to 5.45 Hz will be described.

First, the weight balance on the pole is calculated so that the second resonant frequency of the rod is 5.45 Hz when the intended rod 1 to the rod 3 are connected and one fishing rod fishing rod is used. That is, the frequency of the fishing rod when it becomes the secondary resonance vibration from the diameter, length, prepreg material, high specific gravity prepreg material, and the like of the planned far table 1 to the repair table 3 (resonant frequency) By simulating the weight distribution at each pole such that) is 5.45 Hz, the axial range in which the above-mentioned high specific gravity prepreg material should be laminated is calculated for each pole. In order to simulate such a weight distribution, methods, such as a finite element method or a link model, can be used.

For example, in the analysis according to the finite element method, as shown in FIG. 6, the cantilever of a fishing rod is composed of N one-dimensional beam elements having two degrees of freedom in the translation direction and the rotation direction at the nodes. Model with elastic beams. Each beam element is assumed to be a single cross section within the element. One end is used as the fixed end, and the other end is calculated under the boundary condition as the free end.

In addition, as an analysis by the link model, since the rod produces a large deformation during use, the fishing rod is modeled according to multibody dynamics corresponding to large deformation (geometric nonlinearity). As shown in FIG. 5, it models here using the multi-body which consists of N rigid links which have a rotating spring in a node. By modeling a fishing rod using a link model, since the posture angle of adjacent rigid links is no longer limited, it is possible to describe in any large deformation. The rod motion equation of the constraint condition can be derived as equation (1).

Next, as shown to Fig.3 (a), the prepreg raw material P1 required for the mandrel 100 installed according to the diameter or taper change of each pole is wound up (as mentioned above, a tape-shaped thing and a sheet | seat). The high specific gravity prepreg raw material P2 is wound in the predetermined axial range calculated above (FIG. 3 (b)). In order to produce a sufficient weight, the high specific gravity prepreg material P2 may be wound several times. In addition, although only one high specific weight prepreg material P2 is wound on the prepreg material P1 in FIG.3 (b), you may wound two or more high specific weight prepreg material P2 at intervals in the axial direction.

Furthermore, an epoxy resin is apply | coated to a circumferential surface, the pole raw material corresponded to the original 1 to the repair 3, respectively, is produced, and these are baked in a furnace. After firing, the circumferential surface is polished, and both ends are cut to a predetermined axial length to produce respective poles.

Here, the case where the total length is 2700 mm and the second resonant frequency is set to 5.45 Hz is illustrated, but the resonant frequency in the preferred vibration mode varies depending on the length of the pole.

For example, in the case of setting the rice cake fishing rod as the first resonant frequency, if the resonant frequency is set for every length of the fishing rod within the area of Table 1 in the coordinate axis in which one axis is the full length and the other axis is the resonant frequency, It's okay.

In the case of setting the rice cake fishing rod as the second resonant frequency, the resonance frequency may be set for every entire length of the fishing rod within the region of Table 3 in the coordinate axis in which one axis is the full length and the other axis is the resonant frequency. .

Further, in the case where the rice cake fishing rod is set as the third resonant frequency, the resonant frequency may be set for every entire length of the fishing rod within the area of Table 4 in the coordinate axis in which one axis is the full length and the other axis is the resonant frequency. .

In addition, this rice cake fishing rod has a high specific gravity prepreg laminated, and the weight distribution is partially produced in the axial direction of the pole, but the weight distribution is produced. For example, a ring-shaped member is arranged on the circumferential surface of the pole. You may employ a technique.

In this embodiment, the description is given in the rice cake fishing rod, but the type of fishing rod is not limited to this. Even for fishing rods other than rice cake fishing rods, other types of fishing rods are generally considered to be important factors in terms of maneuverability, rigidity, and original resilience for maneuverability at the time of feeding and harvesting fish. It is naturally possible to apply the present invention to the. For example, it is extremely effective to apply the present invention to a fishing rod for fly, a fishing rod for luer and the like. In this case, the fishing line guide may be disposed at a predetermined position, and the weight distribution may be produced by partially changing the weight in the pole axial direction.

Specific Example

Next, a specific Example is shown and described about this invention.

<Lower limit value and upper limit value in each resonance vibration>

In a fishing rod, what has various weight and rigidity exists so that a "pole bend" can be produced. However, these weights and stiffness may not be set unlimitedly. Excessively heavy fishing rods are difficult to use, and fishing rods that are too rigid or too rigid can not catch fish. That is, the full weight or rigidity of the fishing rod which can be used in reality as a fishing rod exists, and it is necessary to examine this also in setting the favorable resonant frequency of a fishing rod. Therefore, the weight and the rigidity of the fishing rod which can be manufactured were computed from a well-known fishing rod, and the lower limit and the upper limit corresponding to setting the favorable resonant frequency of a fishing rod were calculated from this.

Regarding the weight of a fishing rod, the weight of the weight which can be added to a rod raw material was calculated and calculated in order to adjust the resonant frequency by adding the raw material, coating, and rod parts which are necessary when manufacturing a fishing rod. Specifically, the weight of the weight that can be added from a plurality of existing rice cake fishing rods was calculated for every length of the rice cake fishing rod. The results are shown in Table 5.

Regarding the rigidity of the fishing rod, there are various measuring methods, but the rigidity can be measured by the following method. That is, a plurality of poles are connected to each other to form a fishing rod, and the pole proximal end is fixed at an angle of 70 degrees in the horizontal direction. A weight of about 300 g is applied to the end of the waterline, and the rank is classified by what percentage of the total length of the fishing rod from the horizontal surface of the tip (see Fig. 5). Rank 0 is defined as the tip position is in the range of 0 to 3% of the total length, rank 1 is the tip position is in the range of 3 to 6% of the total length, and rank 2 is defined as the tip position is in the range of 6 to 9% of the total length. do. Since there are anglers in the rice cake fishing rod that it is preferable that the rigidity is relatively low, the rigidity of the fishing rod for realizing the rank 0 was set.

The range which can be adjusted as the 1st-3rd resonant frequency of rice cake fishing rod was computed by calculating from the weight and rigidity of the addable weight obtained in this way. Specifically, the finite element method described above was used for the simulation. However, it is also possible to use a technique such as a link model. About arrangement | positioning of a weight layer, the weight layer is arrange | positioned 1 place or several places in a pole in the range which does not exceed the addable weight of Table 5 in total. Although the arrangement position may be at any position on the pole, it is effective to control the vibration by arranging it at the position of the belly and node of the vibration when the resonance is vibrating. For this reason, in the simulation, the first to third resonant frequencies in various combinations that can be arranged in a range not exceeding the addable weight shown in Table 5 in total in the positions of the vibration and nodes of the vibration are calculated, Got a range. The lower limit values of the first to third resonant frequencies for each of the fishing rods thus obtained are shown in Table 6 below.

Moreover, generally, the resonance frequency falls with the addition of heavy materials such as paint and parts. Therefore, the raw material which does not add the weight goods, such as a coating and a component, becomes the upper limit of the 1st-3rd resonant frequency for every length of each pole. This is shown in Table 7 below.

Within the range obtained in this way, by setting the resonant frequencies in the first to third orders, respectively, it can be realized even in a fishing rod that industrially produces a "long bend" of a good fishing rod.

<Emotion evaluation>

18 types of samples were prepared for each rice cake fishing rod having a total length of 9 characters (2700 mm) while varying the weight distribution and rigidity, and the first to third resonant frequencies were measured for each rice cake fishing rod (Table 8 Reference).

These 18 samples were provided to seven anglers, and the poles were actually shaken, and a sensitivity evaluation test was performed with a total score of 5 points for the "general shaking feeling". The evaluation of each angler was added together, and this was set as the total score (35 points of perfect scores), and the score of each sample was made. (See Table 9)

The sensory evaluation total score data thus obtained and the first to third resonant frequencies were regressed and plotted.

The results are shown as Tables 10-12.

It can be seen that the overall score of the response evaluation decreases as the first resonant frequency increases. The sensory evaluation overall score was 10.9 points (20.9 points-4.3 points) because the average value was 20.9 points and the standard deviation was 4.3 points. The resonance frequency is calculated to be 1.88 Hz. In general, the present invention matches the upper limit value of the first-order resonant frequency specified when it is 9 characters (2700 mm).

In accordance with the increase in the second resonant frequency, the sensitivity evaluation overall score is lowered as in the first case. As in the first case, when 16.6 points is a boundary point of "bad evaluation" or "evaluation is normal", it is calculated as 5.99 Hz. In general, the present invention matches the upper limit value of the second-order resonant frequency specified when it is 9 characters (2700 mm).

In response to the increase in the third resonant frequency, the sensitivity evaluation overall score is lowered as in the first case. As in the first case, when 16.6 points is a boundary point of "bad evaluation" or "evaluation is normal", the calculation is 13.47 Hz. In general, in the present invention, the upper limit of the third resonant frequency specified when 9 characters (2700 mm) is matched.

As described above, according to the present invention, it is possible to produce a good long bend, such as a fishing rod made of a natural material.

Claims (21)

The relationship between the full length of the rod and the first resonant frequency of the rod, In the coordinate axis in which one axis is the full length and the other axis is the resonance frequency, 1.5 to 2.2 Hz if the total length is 2400 mm, 1.4 to 1.8 Hz for a total length of 2700 mm, 1.1 to 1.6 Hz when the total length is 3000 mm, 0.9 to 1.6 Hz, if the total length is 3300 mm 0.9 to 1.5 Hz, if the total length is 3600 mm Fishing rod in the area enclosed by each point of 0.9 to 1.4 Hz for a total length of 3900 mm. The relationship between the full length of the rod and the secondary resonance frequency of the rod, In the coordinate axis in which one axis is the full length and the other axis is the resonance frequency, 5.2 ~ 7.3Hz, if the total length is 2400mm 4.5 to 6.3 Hz when the total length is 2700 mm, 4.3 to 5.6 Hz, when the total length is 3000 mm, 3.7 to 5.6 Hz when the total length is 3300 mm, 3.5 to 5.3 Hz, if the total length is 3600 mm Fishing rod in the area enclosed by each point, 3.5 to 4.9 Hz, for a total length of 3900 mm. The relationship between the full length of the rod and the third resonant frequency of the rod, In the coordinate axis in which one axis is the full length and the other axis is the resonance frequency, 11.6 ~ 15.4Hz, if the total length is 2400mm, 10.5 to 13.4 Hz when the total length is 2700 mm, 9.4 ~ 12.1Hz, if the total length is 3000mm 8.5 to 12.0 Hz when the total length is 3300 mm, 8.5 to 11.2 Hz when the total length is 3600 mm, Fishing rod in the area enclosed by each point of 8.2 to 10.5 Hz, when the total length is 3900 mm. In the fishing rod used for fishing, A fishing rod with a total length of 8 characters (2400 mm) and having a primary resonant frequency of 1.5 to 2.2 Hz. In the fishing rod used for fishing, A fishing rod with a total length of 9 characters (2700 mm) and having a primary resonant frequency of 1.4 to 1.8 Hz. In the fishing rod used for fishing, A fishing rod with a total length of 10 characters (3000 mm) and having a primary resonant frequency of 1.1 to 1.6 Hz. In the fishing rod used for fishing, A rod whose length is 11 characters (3300 mm) and whose primary resonant frequency is between 0.9 and 1.6 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 12 characters (3600 mm) and having a primary resonant frequency of 0.9 to 1.5 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 13 characters (3900 mm) and having a primary resonant frequency of 0.9 to 1.4 Hz. In the fishing rod used for fishing, A fishing rod with a total length of 8 characters (2400 mm) and having a secondary resonant frequency of 5.2 to 7.3 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 9 characters (2700 mm) and a second resonance frequency of the rod in the range of 4.5 to 6.3 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 10 characters (3000 mm) and a secondary resonance frequency of the rod in the range of 4.3 to 5.6 Hz. In the fishing rod used for fishing, A rod whose length is 11 characters (3300 mm) and whose secondary resonant frequency is in the range of 3.7 to 5.6 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 12 characters (3600 mm) and a secondary resonance frequency of the rod in the range of 3.5 to 5.3 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 13 characters (3900 mm) and a second resonant frequency of 3.5 to 4.9 Hz. In the fishing rod used for fishing, A fishing rod with a total length of 8 characters (2400 mm) and having a third resonant frequency in the range of 11.6 to 15.4 Hz. In the fishing rod used for fishing, A fishing rod with a total length of 9 characters (2700 mm) and having a third resonant frequency in the range of 10.5 to 13.4 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 10 characters (3000 mm) and a rod third resonant frequency in the range of 9.4 to 12.1 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 11 characters (3300 mm) and having a third resonant frequency of 8.5 to 12.0 Hz. In the fishing rod used for fishing, Fishing rod with a total length of 12 characters (3600 mm) and having a third resonant frequency of 8.5 to 11.2 Hz. In the fishing rod used for fishing, A fishing rod with a total length of 13 characters (3900 mm) and having a third resonant frequency of 8.2 to 10.5 Hz.