Fishing reel with rod-wheel integrated structure

By designing a fishing reel with a detachable connection and a specific outlet duct and wire gauge structure, the problems of limited fishing reel types, uneven fishing line collection and uneven weight distribution in the prior art are solved, and smoother fishing line collection and better weight distribution are achieved.

CN222967745UActive Publication Date: 2025-06-13NINGBO TAKIZAWA FISHING TACKLE CO LTD
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Patent Information

Application Number
CN202421989171.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-16
Publication Date
2025-06-13
Estimated Expiration
2034-08-16

AI Technical Summary

Technical Problem

The middle-to-purpose fishing reels in the prior art have problems such as type limitations, uneven fishing line collection and release, wear and fracture, and uneven weight distribution.

Method used

A fishing reel with an integrated rod and wheel structure is designed, including a detachable connecting rod body and a fishing reel body. The main body of the fishing reel is equipped with a line duct and a wire gauge. The fishing wire enters and exits along the line duct through the wire gauge to achieve a smoother fishing line collection and release function, and improve the overall weight balance by optimizing the distribution of the center of gravity axis.

Benefits of technology

It realizes the integrated structure of rod and wheel, adapts to various types of fishing reels, improves the smoothness of fishing line collection and release, extends the service life, and provides better weight distribution and user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

A fishing reel with a rod and wheel integrated structure comprises a rod body, and the rod body comprises a fishing rod section and a handle section which are independently arranged; the fishing reel main body is provided with a front connecting part and a rear connecting part, the front connecting part is detachably connected with the fishing rod section, and the rear connecting part is detachably connected with the handle section; a wire outlet groove is formed in the fishing reel body, a wire guide gauge is arranged in the fishing reel body, the wire guide gauge and the fishing rod section are arranged in a staggered mode, and the wire guide gauge acts on the fishing wire so that the fishing wire can enter and exit the fishing reel body along the wire outlet groove. According to the fishing reel, the structures of the rod body and the fishing reel main body are optimized and improved, so that the integrated structure of the rod and the reel is successfully realized, the fishing reel is provided with the specific wire outlet groove and the wire guide gauge structure, in-out and paying-off of a fishing wire are restrained, the fishing wire moves outside the rod body, and the function of taking up and paying off the fishing wire more smoothly is further realized.
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Description

Technical Field

[0001] The utility model relates to the technical field of fishing gear, in particular to a fishing reel with a rod-reel integrated structure. Background Art

[0002] Fishing is an outdoor sport. The goal is to catch fish from the water with fishing gear. Fishing is not restricted by gender or age, and both adults and children like it. Fishing allows people to get close to nature and cultivate sentiment, and is warmly pursued by a large number of enthusiasts.

[0003] The through-tube fishing reel is suitable for fishing scenarios with higher requirements for casting distance, line speed control, and tensile strength, especially when long-term fishing operations are required or when facing large fish.

[0004] Example of the prior art 1, referring to the patent document CN106719499A, which relates to a concave fishing reel seat for an in-line fishing rod. It includes a hollow fishing rod, a fishing reel, a fishing reel seat, and a grip. The fishing rod is connected to the front interface part of the seat, and the grip is connected to the rear interface part of the seat. The foot seat of the fishing reel is clamped by the buckle of the seat. After the fishing line is wound around the fishing reel, it extends along the hollow inner tube of the fishing rod and extends out from the front end of the fishing rod. The grip is a structure with an arbitrarily telescopic and positionable length. The beneficial effects of the present invention are: light weight, low cost, high structural strength, and convenient use; the grip with an arbitrarily telescopic and positionable structure allows anglers to set the length of the grip more casually; it is suitable for installing fishing reels of any specification; it can be used by both left-handed and right-handed people; it can extend the service life of the fishing line, fishing rod, grip, and fishing reel.

[0005] Example of the prior art 2, referring to the patent document CN204837615U, which discloses a rod-reel integrated combined in-line fishing rod, including a fishing reel main body. The fishing reel main body has an upward opening, and a connecting pipe is connected to the opening. The front end of the connecting pipe is connected to a fishing rod, and the rear end of the connecting pipe is connected to a grip. The fishing reel main body includes a main body shell. A side cover is fixedly connected to the left side of the main body shell, a front buckle is fixedly connected to the front end of the main body shell, and a rear buckle is fixedly connected to the rear end of the main body shell. The connecting pipe has a downward opening. A front buckle groove is designed at the front end of the opening of the connecting pipe, and a fixing notch is designed at the rear end of the opening of the connecting pipe. The front buckle groove corresponds to the front buckle, and the fixing notch corresponds to the rear buckle. The rear end of the connecting pipe is provided with a threaded connection head, and a snap ring is sleeved on the threaded connection head. A clamping groove is designed on the inner surface of the front part of the snap ring, and a locking nut is threadedly connected to the threaded connection head behind the snap ring.

[0006] Both Technical Example 1 and Technical Example 2 show a through-type fishing reel structure with a rod-reel integrated design. In actual use, there are certain drawbacks. For example: 1. Its type is limited to the through-type fishing reel and does not reveal the usage methods of other types of fishing reels, so it has obvious limitations in terms of type; 2. In a through-type fishing reel, the rod part needs to have a through hole, and the fishing line passes through the hole to achieve line retrieval and release. However, the rod itself will exert a force (resistance) on the fishing line, resulting in unsmooth line retrieval and release and prone to wear and breakage; 3. There is no weight management design, resulting in uneven weight distribution and poor user feel during actual use. Summary of the Invention

[0007] In order to overcome the above-mentioned deficiencies of the prior art, the present utility model provides a fishing reel with a rod-reel integrated structure.

[0008] The technical solution adopted by the present utility model to solve its technical problems is: A fishing reel with a rod-reel integrated structure, comprising:

[0009] A rod body, which includes a fishing rod section and a handle section that are independently arranged;

[0010] A fishing reel main body, which has a front connection part and a rear connection part. The front connection part is detachably connected to the fishing rod section, and the rear connection part is detachably connected to the handle section;

[0011] An outlet groove is provided on the fishing reel main body, and a line guide is provided in the fishing reel main body. The line guide is arranged offset from the fishing rod section, and the line guide acts on the fishing line so that the fishing line enters and exits the fishing reel main body along the outlet groove.

[0012] Preferably, the center of gravity axis of the rod body and the center of gravity axis of the fishing reel main body are arranged along the same straight line.

[0013] Regarding a preferred embodiment of the present utility model, the rear connection part is connected to the handle section through a fastening structure;

[0014] Optionally, the fastening structure is a threaded connection structure or a snap connection structure or a screw connection structure.

[0015] Regarding another preferred embodiment of the present utility model, the front connection part is connected to the fishing rod section through a quick-release structure.

[0016] The quick-release structure includes an expandable inner sleeve and a locking outer sleeve;

[0017] The expandable inner sleeve is provided with a jack, and the fishing rod section can extend into the expandable inner sleeve through the jack;

[0018] The expandable inner sleeve is connected to the front connection part;

[0019] The described locking outer sleeve is sleeved outside the expanding inner sleeve and forms a detachable connection with the expanding inner sleeve.

[0020] Further, the expanding inner sleeve sequentially includes an expanding clamping portion, a first connecting thread portion, a limiting portion, and a second connecting thread portion from front to back;

[0021] A plurality of deformation grooves are provided on the expanding clamping portion. When the fishing rod section extends in, the expanding clamping portion expands outward after being squeezed by the fishing rod section, so that the fishing rod section can be smoothly inserted into the jack;

[0022] The first connecting thread portion forms a threaded connection with the locking outer sleeve;

[0023] The limiting portion abuts against the front connecting portion to form a limiting fit;

[0024] The second connecting thread portion forms a threaded connection with the front connecting portion.

[0025] On the other hand, the locking outer sleeve has a reduced-diameter inner wall that gradually narrows from back to front;

[0026] When the expanding clamping portion expands outward after being squeezed by the fishing rod section, the reduced-diameter inner wall abuts against the expanding clamping portion and applies an inward locking force to the expanding clamping portion, so that the expanding inner sleeve clamps the fishing rod section.

[0027] In some preferred embodiments of the present invention, the fishing rod section has an insertion section and a limiting section. The insertion section is inserted into the jack, and the limiting section can abut against the front end of the expanding inner sleeve and / or the locking outer sleeve to form a limiting fit.

[0028] In some preferred embodiments of the present invention, a finger abutting portion is provided at the lower end of the fishing reel body.

[0029] Further, the side of the finger abutting portion close to the handle section has an arc-shaped contact end face.

[0030] The beneficial effects of the present invention are as follows:

[0031] First, through the structural optimization and improvement of the rod body and the fishing reel body, the rod-reel integrated structure is successfully realized.

[0032] Second, the fishing reel body is respectively detachably connected to the fishing rod section and the handle section, so that they can be arbitrarily combined, and the fishing reel body can be matched with different rod bodies.

[0033] III. It has a specific wire outlet groove and wire gauge structure, which restricts the entry and exit of the fishing line, enabling the fishing line to move outside the rod body, thereby achieving a smoother fishing line retracting and releasing function.

[0034] IV. It has a wide range of applicability. Since the fishing rod section does not need to be used as a channel for the fishing line to enter and exit, it can be made into a closed structure, and the rod body can be adapted to various types of fishing reels, such as a drop shot reel, a drum reel, etc.

[0035] V. The center of gravity axis of the rod body and the center of gravity axis of the fishing reel body are arranged along the same straight line, so that the overall (rod body and fishing reel body) has a more balanced weight distribution, and thus the user has a better experience in controlling the rod, the reel, and the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the present utility model.

[0037] Figure 2 is a distribution diagram of the fishing line direction in the present utility model.

[0038] Figure 3 is Figure 2 an enlarged schematic diagram of part A in

[0039] Figure 4 is a schematic diagram of the separation of the rod body and the fishing reel body.

[0040] Figure 5 is a schematic diagram of the separation of the fishing rod section and the fishing reel body.

[0041] Figure 6 is a schematic diagram of the separation of the handle section and the fishing reel body.

[0042] Figure 7 is a schematic diagram of the bottom structure of the present utility model and an enlarged schematic diagram of the partial structure.

[0043] Figure 8 is a schematic diagram of the structure of the locking outer sleeve tube.

[0044] Figure 9 is a schematic diagram of the structure of the expanding inner sleeve tube.

[0045] Figure 10 is a schematic diagram of the structure of the fishing reel body.

[0046] Figure 11 is a schematic diagram of the present utility model during use.

[0047] In the figure: 1. Rod body; 11. Fishing rod section; 111. Insertion section; 112. Limiting section; 12. Handle section; 1a. Gravity axis of the rod body; 2. Fishing reel main body; 21. Front connection part; 22. Rear connection part; 23. Line outlet groove; 24. Guide; 25. Fishing line; 2a. Gravity axis of the fishing reel main body; 3. Fastening structure; 4. Quick-release structure; 41. Expanding inner sleeve; 411. Insertion hole; 412. Expanding clamping part; 4121. Deformation groove; 413. First connection thread part; 414. Limiting part; 415. Second connection thread part; 42. Locking outer sleeve; 421. Reduced-diameter inner wall; 5. Finger abutting part; 51. Arc contact end face; 6. Finger. Detailed implementation mode

[0048] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific elaborations of the present utility model, and their purpose is to enable those skilled in the art to better understand the technical solutions of the present utility model, and should not be construed as a limitation to the present utility model.

[0049] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0050] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, if terms such as "installation", "connection", "connection" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art of the present utility model, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0051] Embodiment 1

[0052] Refer to Figures 1 to 11A fishing reel with an integrated rod-reel structure comprises: a rod body 1, which comprises a fishing rod section 11 and a handle section 12 which are independently arranged; a fishing reel body 2, which comprises a front connecting portion 21 and a rear connecting portion 22, the front connecting portion 21 is detachably connected to the fishing rod section 11, and the rear connecting portion 22 is detachably connected to the handle section 12; it should be specially noted that a line outlet groove 23 is provided on the fishing reel body 2, and a wire gauge 24 is provided in the fishing reel body 2, the wire gauge 24 and the fishing rod section 11 are staggered with each other, and the wire gauge 24 acts on a fishing line 25 so that the fishing line 25 enters and exits the fishing reel body 2 along the line outlet groove 23.

[0053] The above content is the basic structural scheme of the utility model. First, by optimizing and improving the structure of the rod body 1 and the fishing reel body 2, the rod and reel integrated structure is successfully realized; second, the fishing reel body 2 is detachably connected to the fishing rod section 11 and the handle section 12 respectively, so that they can be combined arbitrarily, so that the fishing reel body 2 can match different rod bodies 1; third, it has a specific wire outlet groove 23 and a wire gauge 24 structure, which constrains the entry and exit of the fishing line 25, allowing the fishing line 25 to move outside the rod body 1, thereby achieving a smoother fishing line 25 retraction and release function.

[0054] It is worth mentioning that the connection between the rod body 1 and the fishing reel body 2 is achieved through the structural arrangement of the front connecting portion 21 and the rear connecting portion 22, so the foot structure used for fixing in the existing conventional fishing reel can be eliminated to reduce the overall weight. Figure 2 Since the fishing rod section 11 in the utility model does not need to be a passage for the fish line 25 to enter and exit, it can be made into a closed structure, and the rod body 1 can be adapted to various forms of fishing reels, such as a water drop reel, a drum reel, etc.

[0055] Preferably, refer to Figure 4 The center of gravity axis of the rod body 1 and the center of gravity axis of the fishing reel body 2 are arranged along the same straight line, so that the whole (rod body 1 and fishing reel body 2) has a more balanced weight distribution, so that the user has a better experience of controlling the rod, reel and line.

[0056] Embodiment 2

[0057] Based on the structure of the first embodiment, this embodiment provides a more optimized solution for the local mechanism, as follows:

[0058] 1. Reference Figure 6 The rear connection portion 22 is connected to the handle section 12 via a fastening structure 3; optionally, the fastening structure 3 is a threaded connection structure, a buckle connection structure, or a twist-on connection structure. The connection structure mentioned above is only a preferred embodiment of the fastening structure 3 in the present invention and is not specifically limited here.

[0059] II. Reference Figure 5 Figure 5 , the front connecting part 21 is connected to the fishing rod section 11 through the quick-release structure 4. The quick-release structure 4 is provided for two purposes. First, it can achieve the quick disassembly and installation operations between the fishing rod section 11 and the fishing reel body 2. Second, it provides a stable supporting effect. Especially when a fish is hooked, the pulling force generated by the fish pulling the fishing line 25 will be transmitted to the fishing rod section 11 and the fishing reel body 2, and sufficient connection stability is required.

[0060] Preferably, with reference to Figures 3 to 4 Figures 3 to 4 , the quick-release structure 4 includes an expanding inner sleeve 41 and a locking outer sleeve 42; the expanding inner sleeve 41 is provided with an insertion hole 411 (which can be a through hole or a blind hole, etc.), and the fishing rod section 11 can extend into the expanding inner sleeve 41 through the insertion hole 411. Generally speaking, the greater the extending distance, the greater the contact amount between the two, so a better leverage ratio and supporting stability can be provided; the expanding inner sleeve 41 is connected to the front connecting part 21; the locking outer sleeve 42 is sleeved outside the expanding inner sleeve 41 and forms a detachable connection with the expanding inner sleeve 41. During assembly, the first step is to connect the expanding inner sleeve 41 to the front connecting part 21; the second step is to sleeve the locking outer sleeve 42 outside the expanding inner sleeve 41, and at this time, it is not necessary to lock the locking outer sleeve and the expanding inner sleeve 41, so that the two remain in a relatively loose state; the third step is to insert the fishing rod section 11 into the insertion hole 411 to achieve the pre-positioning connection effect; the fourth step is to lock the locking outer sleeve and the expanding inner sleeve 41, so as to achieve a stable and reliable connection between the fishing rod section 11 and the fishing reel body 2.

[0061] A more preferred structural solution for the expanding inner sleeve 41 is: with reference to Figure 9 Figure 9 , the expanding inner sleeve 41 sequentially includes an expanding clamping part 412, a first connecting thread part 413, a limiting part 414 and a second connecting thread part 415 from front to back;

[0062] Among them, the expansion clamping part 412 has an effect similar to that of an expansion screw sleeve in this solution. A number of deformation grooves 4121 are provided on the expansion clamping part 412. When the fishing rod section 11 is inserted, the expansion clamping part 412 expands outward after being squeezed by the fishing rod section 11, so that the fishing rod section 11 can be smoothly inserted into the jack 411. The first connecting thread part 413 is threadedly connected with the locking outer sleeve 42, so that a sufficiently stable and reliable connection relationship is formed between the locking outer sleeve 42 and the expansion inner sleeve 41. The limiting part 414 abuts against the front connecting part 21 to form a limiting fit, playing an effective limiting role to prevent the over-connection between the expansion inner sleeve 41 and the locking outer sleeve 42, resulting in damage to the thread and further affecting the thread performance. The second connecting thread part 415 is threadedly connected with the front connecting part 21, so that a sufficiently stable and reliable connection relationship is formed between the locking outer sleeve 42 and the fishing reel main body 2.

[0063] On the other hand, referring to Figure 8 , the locking outer sleeve 42 has a reduced-diameter inner wall 421 that gradually narrows from back to front. When the expansion clamping part 412 expands outward after being squeezed by the fishing rod section 11, the reduced-diameter inner wall 421 abuts against the expansion clamping part 412 and applies an inward locking force to the expansion clamping part 412, so that the expansion inner sleeve 41 clamps the fishing rod section 11. It should be noted that when the relative position between the expansion inner sleeve 41 and the locking outer sleeve 42 is closer, the contact between the reduced-diameter inner wall 421 and the expansion clamping part 412 is more, and the generated locking force is greater. Therefore, the locking effect is more obvious and effective, so that the expansion inner sleeve 41 can firmly clamp the fishing rod section 11.

[0064] In some preferred embodiments of the present invention, referring to Figure 3 , Figure 5 , the fishing rod section 11 has an insertion section 111 and a limiting section 112. The insertion section 111 is inserted into the jack 411 and at least partially clamped by the expansion clamping part 412 on the expansion inner sleeve 41. The limiting section 112 can abut against the front end of the expansion inner sleeve 41 or / and the locking outer sleeve 42 to form a limiting fit, thereby preventing the fishing rod section 11 from being over-inserted into the jack 411, so that the position accuracy between the fishing rod section 11 and the fishing reel main body 2 is higher.

[0065] Embodiment 3

[0066] Since the present invention has a rod-reel integrated structure and is preferably arranged on the center of gravity axis, the overall rod-reel weight is very balanced. One defect caused by this is that when users start using it, it is difficult to find a comfortable gripping position that is easy to start with and easy to form muscle memory, which will affect the control effect of users on the rod-reel.

[0067] To eliminate the above-mentioned defects, in some preferred embodiments of the present utility model, referring to FIG. Figure 11 , a finger abutting portion 5 is provided at the lower end of the fishing reel main body 2. The finger abutting portion 5 is used to abut and limit a part of the finger 6 during holding, providing a good holding effect. It should be noted that when designing, the weight of the finger abutting portion 5 should also be taken into account so that the center of gravity axis of the rod body 1 can still be arranged along the same straight line as the center of gravity axis of the fishing reel main body 2.

[0068] Furthermore, referring to Figure 7 , one side of the finger abutting portion 5 close to the handle section 12 has an arc-shaped contact end face 51, so that when the finger 6 contacts, it is not abrupt, has a better hand feeling, and is more comfortable for long-term use.

[0069] It is worth noting that other technical solutions of the present utility model belong to the prior art, so they will not be elaborated herein.

[0070] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as within the protection scope of the present utility model.

Claims

1. A fishing reel with a rod-reel integrated structure, characterized in that: Included are: A rod body (1) comprising a fishing rod section (11) and a handle section (12) which are independently arranged from each other; A fishing reel body (2) having a front connection portion (21) and a rear connection portion (22), wherein the front connection portion (21) is detachably connected to the fishing rod section (11), and the rear connection portion (22) is detachably connected to the handle section (12); The fishing reel body (2) is provided with a line outlet groove (23), the fishing reel body (2) is provided with a wire gauge (24), the wire gauge (24) and the fishing rod section (11) are arranged in a staggered manner, and the wire gauge (24) acts on the fishing line (25) so that the fishing line (25) enters and exits the fishing reel body (2) along the line outlet groove (23).

2. The fishing reel with rod-reel integrated structure according to claim 1, characterized in that: The center of gravity axis of the rod body (1) and the center of gravity axis of the fishing reel body (2) are arranged along the same straight line.

3. The fishing reel with rod-reel integrated structure according to claim 1, characterized in that: The rear connecting portion (22) is connected to the handle section (12) via a fastening structure (3); The fastening structure (3) is a threaded connection structure, a buckle connection structure, or a twist-on connection structure.

4. The fishing reel with rod-reel integrated structure according to claim 1, characterized in that: The front connecting portion (21) is connected to the fishing rod section (11) via a quick-release structure (4).

5. The fishing reel with rod-reel integrated structure according to claim 4, characterized in that: The quick-release structure (4) comprises an expansion inner sleeve (41) and a locking outer sleeve (42); The expansion inner sleeve (41) is provided with an insertion hole (411), and the fishing rod section (11) can extend into the expansion inner sleeve (41) through the insertion hole (411); The expansion inner sleeve (41) is connected to the front connecting portion (21); The locking outer sleeve (42) is sleeved outside the expansion inner sleeve (41) and forms a detachable connection with the expansion inner sleeve (41).

6. The fishing reel with rod-reel integrated structure according to claim 5, characterized in that: The expansion inner sleeve (41) comprises, from front to back, an expansion clamping portion (412), a first connecting threaded portion (413), a limiting portion (414) and a second connecting threaded portion (415); The expansion clamping part (412) is provided with a plurality of deformation grooves (4121). When the fishing rod section (11) is inserted, the expansion clamping part (412) is squeezed by the fishing rod section (11) and expands outwards, so that the fishing rod section (11) can be smoothly inserted into the insertion hole (411). The first connecting threaded portion (413) is threadedly connected to the locking outer sleeve (42); The limiting portion (414) abuts against the front connecting portion (21) to form a limiting fit; The second connecting threaded portion (415) is threadedly connected to the front connecting portion (21).

7. The fishing reel with rod-reel integrated structure according to claim 6, characterized in that: The locking outer sleeve (42) has a reduced diameter inner wall (421) which gradually decreases from the back to the front; When the expansion clamping portion (412) is squeezed by the fishing rod section (11) and expands outward, the reduced diameter inner wall (421) abuts against the expansion clamping portion (412) and applies an inward locking force to the expansion clamping portion (412), so that the expansion inner sleeve (41) clamps the fishing rod section (11).

8. The fishing reel with rod-reel integrated structure according to claim 5, characterized in that: The fishing rod section (11) is provided with an insertion section (111) and a limiting section (112); the insertion section (111) is inserted into the insertion hole (411); the limiting section (112) can abut against the front end of the expansion inner sleeve (41) and / or the locking outer sleeve (42) to form a limiting fit.

9. The fishing reel with rod-reel integrated structure according to claim 1, characterized in that: A finger abutment portion (5) is provided at the lower end of the fishing reel body (2).

10. The fishing reel with rod-reel integrated structure according to claim 9, characterized in that: The finger contact portion (5) has an arc-shaped contact end surface (51) on one side close to the handle section (12).

Citation Information

Patent Citations

  • Inner outlet combined fishing pole

    CN106719499A

  • Walk cobble pole in integrative combination formula of pole wheel

    CN204837615U