Spinning reel body

The spinning reel body integrates inserts with a tapered design to reduce stress and weight, addressing strength and appearance issues in conventional reel bodies by using a positioning mechanism to stabilize the insert placement and prevent sink marks.

JP7735164B2Active Publication Date: 2025-09-08SHIMANO INC
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Patent Information

Application Number
JP2021188765
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-11-19
Publication Date
2025-09-08
Estimated Expiration
2041-11-19

AI Technical Summary

Technical Problem

Conventional spinning reel bodies face issues with stress concentration at the base end of the legs due to sudden cross-sectional area changes, leading to reduced strength and increased weight, along with potential sink marks from prolonged cooling times during injection molding.

Method used

The reel body integrates a fishing rod attachment portion, housing portion, and legs through injection molding, using inserts with a tapered second portion within the legs to reduce thickness and weight, and employs a positioning mechanism to stabilize the insert's placement, preventing sink marks.

Benefits of technology

This configuration achieves a lighter weight and improved appearance by reducing stress concentration and sink marks while maintaining structural integrity.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To provide a reel body 1 of a spinning reel that can realize weight reduction and improvement of appearance at the same time.SOLUTION: A reel body 1 of a spinning reel comprises a fishing rod attachment part 3 to which a fishing rod is attached, a case part 5 comprising a mechanism housing part 13, a leg part 7 extending toward the fishing rod attachment part 3 from the case part 5, and an insert part 9 arranged in the case part 5 and the leg part 7. The fishing rod attachment part 3, the case part 5, and the leg part 7 are integrally formed by injection molding. The insert part 9 comprises a first portion 15, and a second portion 17. The first portion 15 is arranged in the mechanism housing part 13 in such a manner that at least a portion of the first portion 15 is exposed. The second portion 17 is formed integrally with the first portion 15. At least a portion of the second portion 17 is arranged in a base end part 7a of the leg part 7.SELECTED DRAWING: Figure 5
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Description

[Technical Field]

[0001] The present invention relates to a reel body for a spinning reel. [Background technology]

[0002] The reel body of a conventional spinning reel has a fishing rod attachment portion, a housing portion, and legs. A fishing rod is attached to the fishing rod attachment portion. The housing portion has a mechanism housing portion. The legs extend from the housing portion toward the fishing rod attachment portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 56-096644 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, when considering gripping ease, it is desirable for the cross-sectional area of ​​the legs of the reel body to be small, while the cross-sectional area of ​​the casing of the reel body is desirable to be large because a mechanism-accommodating space is provided in the casing.

[0005] When such a leg portion and housing portion are formed as a single unit, if the cross-sectional area suddenly decreases at the base end of the leg, which is the connection point between the leg portion and the housing portion, stress may be concentrated at the base end of the leg, which may reduce the strength of the base end of the leg.

[0006] To avoid this, in the reel body of Patent Document 1, the base ends of the legs are formed so that their cross-sectional area gradually increases as they approach the housing, and a slender reinforcing core is placed inside the legs. In this case, the cross-sectional area (thickness) of the base ends of the legs increases, which could increase the weight of the reel body. Furthermore, if the cross-sectional area (thickness) of the base ends of the legs is increased, the cooling time required when forming the reel body by injection molding increases, which could result in sink marks on the outer surface of the reel body. Furthermore, the reel body of Patent Document 1 does not have a means for positioning the reinforcing core within the reel body, which could make the placement of the reinforcing core unstable and expose the reinforcing core to the surface of the reel body.

[0007] An object of the present invention is to provide a spinning reel body that can achieve an improved appearance or a lighter weight. [Means for solving the problem]

[0008] A reel body of a spinning reel according to one aspect of the present invention includes a fishing rod attachment portion to which a fishing rod is attached, a housing portion having a mechanism housing portion, legs extending from the housing portion toward the fishing rod attachment portion, and inserts disposed within the housing portion and the legs. The fishing rod attachment portion, the housing portion, and the legs are integrally formed by injection molding.

[0009] The insert portion has a first portion and a second portion. The first portion is disposed in the mechanism housing portion so that at least a portion of the first portion is exposed. The second portion is formed integrally with the first portion. At least a portion of the second portion is disposed within the base end of the leg portion.

[0010] In this reel body, by locating at least a part of the second portion of the insert within the base end of the leg, the thickness of the injected resin at the base end of the leg can be reduced, preventing sink marks on the surface and improving the appearance of the reel body.In addition, by using a material that is lighter than the injected resin to form the insert, the weight of the reel body can be reduced.

[0011] Furthermore, since the first portion of the insert portion is positioned in the mechanism storage section so that at least a portion of the first portion is exposed, the exposed portion of the first portion can be used as a positioning means for the insert portion, thereby allowing the insert portion to be suitably positioned relative to the base end of the leg portion.

[0012] In the reel body of the spinning reel according to another aspect of the present invention, the second portion is preferably formed in a tapered shape. This configuration makes it possible to suitably reduce the cross-sectional area (thickness) of the base end of the leg portion.

[0013] In the reel body of a spinning reel according to another aspect of the present invention, the second section preferably has at least one recess. This configuration ensures that the second section and the leg section are integrated together. It also prevents the second section from slipping out of the leg section.

[0014] In the spinning reel body according to another aspect of the present invention, the thickness between the outer surface of the second section and the outer surface of the leg portion is preferably 3.0 mm or less. This configuration makes it possible to effectively prevent the occurrence of sink marks.

[0015] In the spinning reel body according to another aspect of the present invention, the thickness between the outer surface of the second section and the outer surface of the leg portion is preferably 1.5 mm or greater. This configuration allows for favorable flow of the material during injection molding.

[0016] In a spinning reel body according to another aspect of the present invention, the first section preferably has at least one hole. A positioning member fixed to the mold is attached to the at least one hole. This configuration allows the insert to be appropriately positioned relative to the base end of the leg. [Effects of the Invention]

[0017] According to the present invention, it is possible to simultaneously achieve a lighter weight and an improved appearance in the reel body of a spinning reel. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a side view of a reel body of a spinning reel according to an embodiment of the present invention (excluding an insert portion). [Figure 2] FIG. 2 is a partially enlarged perspective view of a portion of the reel body that accommodates the first part of the insert portion. [Figure 3] A side view of the reel body of a spinning reel (including the insert part). [Figure 4] FIG. [Figure 5] FIG. 2 is a partially enlarged side view of the leg portion, the housing portion, and the insert portion. DETAILED DESCRIPTION OF THE INVENTION

[0019] As shown in FIG. 1, the reel body 1 of a spinning reel employing one embodiment of the present invention includes a fishing rod attachment portion 3, a housing portion 5, legs 7, and an insert portion 9. The fishing rod attachment portion 3, housing portion 5, and legs 7 are integrally formed by injection molding. For example, the fishing rod attachment portion 3, housing portion 5, and legs 7 are formed from resin. The fishing rod attachment portion 3, housing portion 5, and legs 7 may also be formed from other materials, such as metal.

[0020] A fishing rod is attached to the fishing rod attachment portion 3. The housing portion 5 has a mechanism housing portion 13. For example, the housing portion 5 has a cylindrical portion 11 and a mechanism housing portion 13. A rotor (not shown) is disposed in the cylindrical portion 11. A spool (not shown) is disposed in front of the rotor.

[0021] Various mechanisms for operating the spinning reel are disposed in the mechanism housing section 13. The various mechanisms include, not shown, a drive gear that rotates in conjunction with the handle, a spool shaft connected to the spool, a pinion gear that meshes with the drive gear and rotates the rotor, and an oscillating mechanism that moves the spool shaft back and forth in conjunction with the rotation of the pinion gear. As shown in FIGS. 1 and 2, the mechanism housing section 13 is provided with a holding section 13a. The holding section 13a covers a held section 15a (described below) of the first section 15 shown in FIG. 4.

[0022] As shown in Fig. 1, the leg portion 7 extends from the housing portion 5 toward the fishing rod attachment portion 3. The leg portion 7 has a base end portion 7a and a tip end portion 7b. The base end portion 7a is provided on the side of the leg portion 7 that faces the mechanism housing portion 13. The base end portion 7a is formed integrally with the mechanism housing portion 13 by injection molding.

[0023] The tip portion 7b is provided on the leg portion 7 on the fishing rod attachment portion 3 side. The tip portion 7b is formed integrally with the base portion 7a and the fishing rod attachment portion 3 by injection molding. In other words, the base portion 7a and the tip portion 7b are formed integrally with the housing portion 5 and the fishing rod attachment portion 3 by injection molding.

[0024] As shown in FIG. 3, the insert portion 9 is disposed within the housing portion 5 and the leg portion 7. For example, the insert portion 9 is formed of resin. The insert portion 9 may also be formed of other materials, such as metal. The material of the insert portion 9 is preferably lighter than the resin of the fishing rod attachment portion 3, the housing portion 5, and the leg portion 7. As shown in FIG. 4, the insert portion 9 has a first portion 15 and a second portion 17.

[0025] 5, the first part 15 is arranged in the mechanism housing section 13 so that at least a part of the first part 15 is exposed. In this embodiment, when the insert part 9 is arranged in the housing part 5 and the leg part 7, the first part 15 is arranged in the mechanism housing section 13 so that a part of the first part 15, for example, the exposed surface 15c, is exposed.

[0026] 4, the first portion 15 has a held portion 15a and at least one hole 15b. The held portion 15a is held by a positioning member H during injection molding. The positioning member H is fixed to a mold (not shown).

[0027] 5, the held portion 15a is held by the holding portion 13a (see FIG. 2) of the mechanism housing portion 13. When the held portion 15a is placed in the holding portion 13a of the mechanism housing portion 13, a portion of the held portion 15a is exposed. For example, the portion of the held portion 15a is an exposed surface 15c that forms one side of the held portion 15a.

[0028] 4, the at least one hole portion 15b includes two hole portions 15b. The two hole portions 15b are formed by being recessed from the exposed surface 15c. Positioning members H are inserted into the two hole portions 15b. This positions the insert portion 9 relative to the mold.

[0029] As shown in FIG. 4, the second portion 17 is formed integrally with the first portion 15. The second portion 17 is formed in a tapered shape. As shown in FIG. 5, at least a portion of the second portion 17 is disposed within the base end portion 7a of the leg portion 7. In this embodiment, the second portion 17 is disposed within the base end portion 7a of the leg portion 7. Note that the second portion 17 may be disposed both within the base end portion 7a and the tip end portion 7b of the leg portion 7.

[0030] 4 and 5, the second portion 17 has at least one recess 17a. The at least one recess 17a includes two recesses 17a1 and 17a2. The two recesses 17a1 and 17a2 are formed in a concave shape on the outer surface of the second portion 17. For example, one recess 17a1 is formed on the front surface of the second portion 17. The other recess 17a2 is formed on the rear surface of the second portion 17.

[0031] The number of recesses 17a (17a1, 17a2) may be 1 or 3 or more. The positions at which the recesses 17a (17a1, 17a2) are formed may be different from the positions described above.

[0032] 5, when the second portion 17 is disposed within the base end portion 7a of the leg portion 7, the thickness T between the outer surface of the second portion 17 and the outer surface of the leg portion 7 is 1.5 mm or more. The thickness T between the outer surface of the second portion 17 and the outer surface of the leg portion 7 is 3.0 mm or less. In other words, the thickness T between the outer surface of the second portion 17 and the outer surface of the leg portion 7 is 1.5 mm or more and 3.0 mm or less.

[0033] Here, the thickness T between the outer surface of the second portion 17 and the outer surface of the leg portion 7 is defined by the outer surface of the second portion 17 excluding the recesses 17a (17a1, 17a2) and the outer surface of the leg portion 7.

[0034] The thickness T between the outer surface of the second portion 17 and the outer surface of the leg 7 may be interpreted as the thickness of the leg 7 (base end 7a) provided around the second portion 17. In this case, the portion of the leg 7 (base end 7a) that is disposed in the recess 17a (17a1, 17a2) is excluded from the measurement of the thickness T.

[0035] The reel body 1 having the above configuration is formed as follows using a mold for forming the fishing rod attachment portion 3, the housing portion 5, and the legs 7. First, the positioning members H fixed to the mold are inserted into the two holes 15b of the insert portion 9 (see FIG. 4). This positions the insert portion 9 within the mold.

[0036] Here, the mold is positioned at a distance from the insert portion 9 so that the thickness T between the outer surface of the second portion 17 and the outer surface of the leg portion 7 is 1.5 mm or more and 3.0 mm or less. The mold comes into contact with the exposed surface 15c of the insert portion 9. In this way, by being fixed to the mold by the two positioning members H and the exposed surface 15c, the insert portion 9 is stably positioned within the reel body without moving when the resin described below is caused to flow.

[0037] Next, the heated resin is poured into the mold. As a result, the heated resin fills the space between the mold and the insert portion 9. In this state, the resin is cooled. The cooling time of the resin is preferably 8 seconds or more and 12 seconds or less.

[0038] Subsequently, after the resin has cooled, the fishing rod attachment part 3, the housing part 5, and the leg part 7 are removed from the mold, whereby the fishing rod attachment part 3, the housing part 5, the leg part 7, and the insert part 9 are integrally formed.

[0039] The reel body 1 of the spinning reel described above has the following features.

[0040] In the present reel body 1, by disposing at least a portion of the second portion 17 of the insert 9 within the base end 7a of the leg 7, the cross-sectional area (thickness) of the base end 7a of the leg 7 is reduced. This reduces the weight of the reel body 1 and improves the appearance of the reel body 1. For example, by forming the insert 9 from a material that is lighter than the materials of the fishing rod attachment portion 3, the housing 5, and the leg 7, the weight of the reel body 1 can be suitably reduced and the appearance of the reel body 1 can be improved.

[0041] In this reel body 1, the first part 15 in the insert portion 9 is arranged in the mechanism storage section 13 so that at least a portion (exposed surface 15c) of the first part 15 is exposed, and therefore the positioning member H can suitably position the insert portion 9 relative to the base end portion 7a of the leg portion 7.

[0042] In the present reel body 1, the second portion 17 is formed in a tapered shape, which allows the cross-sectional area (thickness) of the base end 7a of the leg portion 7 to be suitably small. In the present reel body 1, the second portion 17 has at least one retaining portion 13a, which allows the second portion 17 and the leg portion 7 to be reliably integrated. In addition, the second portion 17 can be prevented from slipping out of the leg portion 7.

[0043] In this reel body 1, the thickness T between the outer surface of the second portion 17 and the outer surface of the leg 7 is 3.0 mm or less, which effectively prevents sink marks.In this reel body 1, the thickness T between the outer surface of the second portion 17 and the outer surface of the leg 7 is 1.5 mm or more, which effectively allows the material to flow during injection molding.

[0044] In this reel body 1, the positioning member H is fixed to the mold. In this state, the positioning member H is inserted into the hole 15b of the first portion 15 of the insert portion 9. This allows the insert portion 9 to be suitably positioned with respect to the base end portion 7a of the leg portion 7. [Industrial Applicability]

[0045] The present invention can be used in the reel body of a spinning reel. [Explanation of symbols]

[0046] 1 reel body 3 Fishing rod attachment part 5 Housing 7 Legs 9 Insert section 13 Mechanism storage section 13a Holding part 15 Part 1 15b Hole 17 Part 2 H Positioning member T Thickness between the outer surface of the second part and the outer surface of the leg

Claims

1. a fishing rod attachment portion to which a fishing rod is attached; a housing having a mechanism housing section; a leg portion extending from the housing portion toward the fishing rod attachment portion; an insert portion disposed within the housing portion and the leg portion; Equipped with the fishing rod attachment portion, the housing portion, and the leg portion are integrally formed by injection molding, The leg portion has a base end portion provided on the mechanism housing portion side and a tip end portion provided on the fishing rod attachment portion side, the insert portion has a first portion that is disposed in the mechanism housing portion so that at least a portion of the first portion is exposed, and a second portion that is formed integrally with the first portion and at least a portion of which is disposed within the base end portion of the leg portion, the first portion has at least two holes; A positioning member fixed to the mold is attached to the hole. The reel body of a spinning reel.

2. The second portion is formed in a tapered shape.

2. The reel body of a spinning reel according to claim 1.

3. the second portion has at least one recess; 3. The reel body of a spinning reel according to claim 1 or 2.

4. The thickness between the outer surface of the second portion and the outer surface of the leg portion is 3.0 mm or less. The reel body of a spinning reel according to any one of claims 1 to 3.

5. The thickness between the outer surface of the second portion and the outer surface of the leg is 1.5 mm or more.

5. The reel body of a spinning reel according to claim 4.

Citation Information

Patent Citations

  • JP1977067895U

  • Production of spinning reel

    JP1981096644A

  • Reel main body for spinning reel

    JP1999346610A