CN105519501B

CN105519501B - Electric winder

Info

Publication number: CN105519501B
Application number: CN201510683549.XA
Authority: CN
Inventors: 林健太郎; 森本伸一
Original assignee: Shimano Inc
Current assignee: Shimano Inc
Priority date: 2014-10-20
Filing date: 2015-10-20
Publication date: 2020-06-12
Anticipated expiration: 2035-10-20
Also published as: JP2016077244A; KR20160046287A; KR102454301B1; JP6411167B2; TWI673000B; TW201615093A; CN105519501A

Abstract

The invention provides an electric reel, which maintains stable waterproof performance without reducing the sealing function of a magnetic sealing mechanism. The electric reel is provided with: a reel body (1); a spool (2) rotatably supported by the reel body (1) and winding a fishing line; a motor (3) that rotates the spool (2); bearings (34, 25, 26) for rotatably supporting the output shaft (32) as a rotating body rotated by the motor (3) and the spool (2) with a bearing support part; magnetic sealing mechanisms (41, 42, 43) arranged to seal the bearings (34, 25, 26), respectively; and magnetic shielding means (51, 52, 53) for shielding the magnetic sealing means (41, 42, 43) from the magnetic interference of the motor (3).

Description

Electric winder

Technical Field

The present invention relates to an electric reel including an electric motor that drives a spool rotatably supported by a reel body and on which a fishing line is wound.

Background

In a conventional electric reel for fishing, a seal member is disposed between a frame near a bearing and a rotating shaft of a motor or the like, thereby achieving waterproofing of the bearing. In a sealing mechanism for preventing water by bringing a sealing member of an elastic body into contact with a rotating shaft, there are the following problems: the sealing member is in contact with the rotating shaft to generate rotation resistance, so that the output of the motor is reduced and the rotation performance is poor.

Further, since the output shaft of the motor rotates at a very high speed, the sealing member is easily worn and cannot maintain stable waterproof performance for a long period of time. In particular, the following situations exist in the electric reel for fishing: since the output shaft is rotationally driven at an ultra high speed, micro-vibration is generated between the contact surfaces of the seal member and the output shaft. Also, there are the following situations: the influence of the micro-vibration causes a phenomenon (entrainment state) in which water (seawater) permeates the interior, and the water (seawater) interacts with the abrasion of the sealing member, so that stable waterproof performance cannot be maintained.

In order to solve this problem, for example,

patent documents

1 and 2 disclose the use of a magnetic seal mechanism. In the electric reel for fishing of patent document 1, a bearing is provided between a motor housing and a spool, and a magnetic seal mechanism is provided on a side of the bearing in contact with outside air. The electric reel for fishing of patent document 2 includes: a spool rotatably supported between the left and right side plates of the reel body; a drive motor provided in the reel body to rotate the drive spool; a bearing for rotatably supporting an output shaft of the drive motor with respect to the bearing support portion; and a magnetic sealing mechanism arranged to seal the bearing. The magnetic seal mechanism is disposed so as to face the output shaft, and includes a holding member that holds a magnet and a magnetic fluid held by a magnetic circuit formed between the magnetic seal mechanism and the output shaft.

Patent document

[ patent document 1] Japanese patent application laid-open No. 11-276042

[ patent document 2] Japanese patent application laid-open No. 2014-161300

Disclosure of Invention

The magnetic sealing mechanism used in the electric reel has the following situations: the magnetic force (magnetism) generated from the drive motor affects the magnetic seal, causing the magnetic fluid to be unstable and deviate from the range it should be. In this case, a sufficient sealing function cannot be exhibited, and a problem of a phenomenon (entrainment state) in which water (seawater) permeates the inside cannot be solved.

The present invention has been made to solve these problems, and an object thereof is to: in an electric reel, a stable waterproof performance is maintained without degrading the sealing function of a magnetic sealing mechanism.

To achieve the object, an electric reel according to an aspect of the present invention includes: a reel body; a spool rotatably supported by the reel body and winding a fishing line; a motor to rotate the spool; a bearing that rotatably supports the rotating body rotated by the motor between the rotating body and the bearing support portion; a magnetic sealing mechanism arranged to seal the bearing; and a magnetic shield mechanism shielding the magnetic seal mechanism from magnetic interference of the motor.

Preferably, the magnetic shield mechanism includes a magnetic shield member on the motor side of the magnetic seal mechanism.

Preferably, the magnetic shielding mechanism covers at least a motor-side surface of the magnetic sealing mechanism with a magnetic shielding member.

Preferably, the magnetic shielding means covers a surface of the bearing support portion on the magnetic sealing means side, which supports the bearing adjacent to the magnetic sealing means, with a magnetic shielding member.

Preferably, the magnetic shield member has a relative magnetic permeability of 1000 or more.

Preferably, the magnetic shielding member comprises a magnetic sheet.

Preferably, the magnetic shield member includes a magnetic elastic body formed of an elastic material.

The rotating body may be an output shaft of the motor. In this case, the magnetic seal mechanism is disposed so as to seal a bearing that rotatably supports the output shaft of the motor with the bearing support portion.

The invention has the following effects: according to the present invention, since the magnetic shield mechanism for shielding the magnetic seal mechanism from the magnetic interference of the motor is provided, the magnetic fluid in the magnetic seal mechanism can be stably maintained, and stable waterproof performance can be maintained.

Drawings

Fig. 1 is a sectional view of an electric reel according to embodiment 1 of the present invention.

Fig. 2 is a partial sectional view of the electric reel of embodiment 1.

Fig. 3 is a sectional view of a motor bearing portion of embodiment 1.

Fig. 4 is a sectional view of the bearing portion of the bobbin on the speed reducer side of embodiment 1.

Fig. 5 is a sectional view of the motor-side bobbin bearing portion of embodiment 1.

Fig. 6 is a sectional view of the electric reel according to embodiment 2 of the present invention.

Fig. 7 is a sectional view of a bearing portion of the bobbin of embodiment 2.

Detailed Description

[ embodiment 1]

Fig. 1 is a sectional view of an electric reel according to embodiment 1 of the present invention. The electric reel 10 includes: a spool 2 rotatably supported by the reel body 1 and winding a fishing line; and a motor 3 driving the bobbin 2. The electric reel 10 includes a handle 4 for manually rotating the spool 2, a counter 5 for displaying a water depth, and the like.

The bobbin 2 includes a cylindrical portion 21 and

flange portions

22 and 23 at both ends of the cylindrical portion 21. The motor 3 is accommodated in the cylindrical portion 21 of the bobbin 2. The housing 31 of the motor 3 is fixed so as not to move relative to the reel body 1. The output shaft 32 of the motor 3 is rotatably supported with respect to the housing 31 by two

bearings

33 and 34. Both

bearings

33 and 34 have an outer ring fitted and fixed to the housing 31 of the motor 3, and an inner ring fitted and rotated with the output shaft 32 together with the output shaft 32. An output shaft 32 of the motor 3 is attached to an input side of the reduction gear 6 including a planetary gear. The output side of the speed reducer 6 is engaged with a gear 24 fixed to the spool 2.

The bobbin 2 is supported by a bearing 25 on the motor 3 side so as to be rotatable with respect to a housing 31 of the motor 3. The gear 24 fixed to the spool 2 is supported by a bearing 26 on the speed reducer 6 side so as to be rotatable with respect to the reel body 1. Therefore, the spool 2 is rotatably supported by the two

bearings

25, 26. The bearing 25 on the motor 3 side is fixed by fitting the inner ring to the housing 31 (bearing support portion) of the motor 3, and the outer ring is rotated together with the spool 2 by fitting to the spool 2. The bearing 26 on the speed reducer 6 side is fixed by fitting the outer ring to the fixed plate 11 (bearing support portion) of the reel body 1, and the inner ring is rotated together with the spool 2 by fitting to the gear 24.

Fig. 2 is a partial sectional view of the electric reel of embodiment 1. Fig. 2 shows a cross section of the spool 2, the motor 3, and the speed reducer 6 of the electric reel 10. In embodiment 1,

magnetic seal mechanisms

41, 42, and 43 for sealing the bearing 34 of the motor 3 and the

bearings

25 and 26 of the bobbin, and

magnetic shield mechanisms

51, 52, and 53 for magnetically shielding the

magnetic seal mechanisms

41, 42, and 43 are used. The bearing 33 of the motor 3 is sealed by the cover 35, so the bearing 33 does not employ a magnetic sealing mechanism.

The housing 31 of the electric motor 3 includes a cylindrical portion 31a, a bottom portion 31b, and a motor holder 31 c. The motor holder 31c is screwed to the outside of one end of the tube 31a, and seals the one end of the tube 31 a. The bottom portion 31b is screwed to the inside of the other end of the tube portion 31a, and seals the other end of the tube portion 31 a. A one-way clutch 36 and a bearing 33 are held at the center of the motor holder 31 c. A cover 35 is fitted to the outside of the center of the motor holder 31c to seal the one-way clutch 36 and the bearing 33. A bearing 34 is held inside the motor 3 at the center of the bottom portion 31 b. A magnetic seal mechanism 41 and a magnetic shield member 51a which is a part of the magnetic shield mechanism 51 are held on the outer side of the motor 3 at the center of the bottom portion 31 b. The bearing 34 is sealed by a magnetic sealing mechanism 41. The magnetic shield mechanism 51 shields the magnetic seal mechanism 41 from the magnetism of the motor 3.

The magnetic seal mechanism 41 also functions as a heat radiation path of the hot bobbin 2 of the housing 31 that is heated by heat generated by the motor 3.

The bearing 25 on the electric motor 3 side of the spool 2 is located between the inner periphery of the cylindrical portion 27 protruding from the flange portion 22 on the motor holder 31c side of the spool 2 toward the motor holder 31c side and the outer periphery of the cylindrical portion 31a of the electric motor 3. Between the bearing 25 and the motor holder 31c, the magnetic seal mechanism 42 and a magnetic shield member 52a which is a part of the magnetic shield mechanism 52 are held. The bobbin 2 rotates relative to the motor holder 31c, so a gap exists between the bobbin 2 and the motor holder 31 c. Since water penetrates through the gap, the motor holder 31c side of the bearing 25 is sealed by the magnetic seal mechanism 42. The magnetic shield mechanism 52 shields the magnetic seal mechanism 42 from the magnetism of the motor 3.

The bearing 26 on the speed reducer 6 side of the spool 2 is located between the outer periphery of a cylindrical portion 24b protruding from the gear 24 fixed to the spool 2 and the inner periphery of a cylindrical boss portion 11b formed on the fixed plate 11 of the reel body 1. The magnetic seal mechanism 43 and the magnetic shield member 53a of the magnetic shield mechanism 53 are held between the cylindrical portion 24b and the boss portion 11b and between the bearing 26 and the gear 24. Since the bobbin 2 rotates relative to the fixed plate 11, a gap is formed between the bobbin 2 and the fixed plate 11 (see fig. 1). Since water penetrates through the gap, the spool 2 side (gear 24 side) of the bearing 26 is sealed by the magnetic sealing mechanism 43. The magnetic shield mechanism 53 shields the magnetic seal mechanism 43 from the magnetism of the motor 3.

Fig. 3 is a sectional view of a motor bearing portion of embodiment 1. The bearing 34 is held between the rotor 37 and the bottom 31b of the motor. The inner ring of the bearing 34 is fitted to the output shaft 32 and rotates together with the output shaft 32. The outer race of the bearing 34 is fitted and fixed to the inside of the motor 3 of the bottom portion 31 b. The output shaft 32 is one of the rotating bodies rotated by the motor 3, and the bottom portion 31b is one of the bearing support portions. A magnetic seal mechanism 41 is disposed on the outer side of the motor 3 at the center of the bottom portion 31 b. The magnetic sealing mechanism 41 includes a magnet 41a,

magnetic members

41b and 41c, and a magnetic fluid 41 d. The magnet 41a and the

magnetic members

41b and 41c are annular so as to surround the outer periphery of the output shaft 32 in the rotational radial direction. The magnet 41a is sandwiched between the

magnetic members

41b and 41 c. A gap is formed between the inner peripheries of the magnet 41a and the

magnetic members

41b and 41c and the output shaft 32. In the magnetic seal mechanism 41, it is assumed that the output shaft 32 is formed of a magnetic material.

The magnet 41a, the magnetic member 41b, the output shaft 32, and the magnetic member 41c form a magnetic circuit. The magnetic fluid 41d is a substance in which ferromagnetic fine particles of several nm to ten and several nm are stably dispersed in a solvent such as a hydrocarbon oil or a fluorine oil matrix using a surfactant. Since the output shaft 32 is magnetized in a portion opposed to the magnet 41a and the

magnetic members

41b and 41c, the magnetic fluid 41d is held in a region surrounded by the magnet 41a, the

magnetic members

41b and 41c, and the output shaft 32. The gaps between the magnet 41a and the

magnetic members

41b and 41c and the output shaft 32 are sealed with the magnetic fluid 41d, and foreign matter is prevented from penetrating from the outside of the motor 3 to the bearing 34 side. The magnetic seal mechanism 41 has high sealing performance against gas because the periphery of the output shaft 32 is surrounded by liquid. Moreover, no solid contacts at the sealing portion, so that no dust is generated. Further, since no solid slip occurs in the seal portion, the loss torque is small, and the rotation performance is not easily lowered.

The magnetic shield member 51a is disposed between the magnetic seal mechanism 41 and the bearing 34, that is, on the motor 3 side of the magnetic seal mechanism 41, so as to surround the periphery of the output shaft 32. A magnetic shield member 51b is attached to the outer surface of the bottom portion 31 b. Each of the

magnetic shield members

51a and 51b is an annular member formed of a magnetic body. The

magnetic shield members

51a and 51b constitute a magnetic shield mechanism 51. The magnetic flux leaking from the motor 3 to the outside of the bottom portion 31b is attracted to and passes through the

magnetic shield members

51a and 51b, and hardly leaks from the

magnetic shield members

51a and 51b to the magnetic seal mechanism 41 side. As a result, the magnetic seal mechanism 41 is shielded from the magnetic interference of the motor 3. Since the magnetic seal mechanism 41 is not affected by the magnetism of the motor 3, the magnetic fluid 41d is stably held in the region surrounded by the magnet 41a, the

magnetic members

41b, 41c, and the output shaft 32, and stable waterproof performance can be maintained.

The relative permeability of the

magnetic shield members

51a, 51b is preferably higher than the relative permeability of nickel by 1000 or more. More preferably, the magnetic shield member has a relative permeability of 2000 or more to that of the steel plate. Further preferably, the silicon steel sheet has a relative permeability of 4600 or more, and most preferably, the nickel-iron alloy has a relative permeability of 60000 or more.

The

magnetic shield members

51a and 51b are not limited to metal plates, and may be flexible magnetic sheets. For example, the magnetic shield member 51b may use a magnetic sheet. Some of the magnetic sheets commercially available as magnetic shielding sheets have a relative permeability of 20000 or more. Since the magnetic sheet can be appropriately attached to a necessary portion, the magnetic sheet can be easily processed and assembled, and a more stable magnetic shielding function can be obtained.

Further, a magnetic elastic body formed of an elastic material may be used as the

magnetic shield members

51a and 51 b. The magnetic elastomer is obtained by mixing particles of a magnetic substance with a non-magnetic elastomer such as rubber. For example, if the magnetic shielding member 51a is made of a magnetic elastic material and is disposed so that the inner periphery thereof is in contact with the output shaft 32, not only the magnetic shielding effect but also the sealing effect can be obtained. In this case, the magnetic shielding member 51a slides with respect to the output shaft 32, and obtains more reliable sealing performance in cooperation with the magnetic sealing mechanism 41.

Fig. 4 is a sectional view of the bearing portion of the bobbin on the speed reducer side of embodiment 1. The bearing 26 on the speed reducer 6 side of the spool 2 is located between the outer periphery of a cylindrical portion 24b protruding from the gear 24 fixed to the spool 2 and the inner periphery of a cylindrical boss portion 11b formed on the fixed plate 11 of the reel body 1. The outer ring of the bearing 26 is fitted and fixed to the fixed plate 11 of the reel body 1, and the inner ring is fitted to the gear 24 and rotates together with the gear 24 (spool 2). The gear 24 is one of the rotating bodies rotated by the motor 3 via the speed reducer 6, and the fixed plate 11 of the reel body 1 is one of the bearing supports. The magnetic seal mechanism 43 and the magnetic shield member 53a of the magnetic shield mechanism 53 are held between the bearing 26 and the gear 24.

The magnetic seal mechanism 43 includes a magnet 43a,

magnetic members

43b and 43c, a magnetic ring 43d, and a magnetic fluid 43 e. The magnet 43a and the

magnetic members

43b and 43c are annular. The magnetic ring 43d is a cylindrical member formed of a magnetic material, and is fitted to the outer periphery of the cylindrical portion 24b of the gear 24 so as to face the magnet 43a and the

magnetic members

43b and 43c without a gap. The magnet 43a is sandwiched between the

magnetic members

43b and 43 c. A gap is formed between the inner peripheries of the magnet 43a and the

magnetic members

43b and 43c and the magnetic ring 43 d.

The magnet 43a, the magnetic member 43b, the magnetic ring 43d, and the magnetic member 43c form a magnetic circuit. When the gear 24 is not a magnetic body, the magnetic ring 43d is fitted to form a magnetic circuit. The magnetic fluid 43e is the same as the magnetic fluid 41d of the magnetic seal mechanism 41. Since the portion of the magnetic ring 43d facing the magnet 43a and the

magnetic members

43b and 43c is magnetized, the magnetic fluid 43e is held in the region surrounded by the magnet 43a, the

magnetic members

43b and 43c, and the magnetic ring 43 d. Gaps between the magnet 43a, the

magnetic members

43b and 43c, and the magnetic ring 43d are sealed with the magnetic fluid 43e, and foreign matter is prevented from penetrating into the bearing 26. The magnetic seal mechanism 43 has high sealing performance against gas because the periphery of the magnetic ring 43d in close contact with the gear 24 is surrounded by liquid.

The magnetic shield member 53a is disposed between the magnetic seal mechanism 43 and the gear 24, that is, on the motor 3 side of the magnetic seal mechanism 43, so as to surround the periphery of the cylindrical portion 24b of the gear 24. The magnetic shield member 53a is an annular member formed of a magnetic body. The magnetic shield member 53a constitutes a magnetic shield mechanism 53. A magnetic shield member may be attached to the face of the gear 24 facing the bearing 26. The magnetic flux leaking from the motor 3 through the gear 24 is attracted to and passes through the magnetic shield member 53a, and hardly leaks from the magnetic shield member 53a to the magnetic seal mechanism 43 side. As a result, the magnetic seal mechanism 43 is shielded from the magnetic interference of the motor 3. Since the magnetic seal mechanism 43 is not affected by magnetism of the motor 3, the magnetic fluid 43e is stably held in the region surrounded by the magnet 43a, the

magnetic members

43b and 43c, and the magnetic ring 43d, and stable waterproof performance can be maintained.

The magnetic shield member 53a has the same relative magnetic permeability as the

magnetic shield members

51a, 51b of the magnetic shield mechanism 51. Similarly to the

magnetic shield members

51a and 51b, the magnetic shield member 53a may be formed of a magnetic sheet or a magnetic elastic body.

Fig. 5 is a sectional view of the motor-side bobbin bearing portion of embodiment 1. The bearing 25 on the electric motor 3 side of the spool 2 is located between the inner periphery of the cylindrical portion 27 protruding from the flange portion 22 on the motor holder 31c side of the spool 2 toward the motor holder 31c side and the outer periphery of the cylindrical portion 31a of the electric motor 3. The inner ring of the bearing 25 is fitted and fixed to the cylindrical portion 31a of the motor 3, and the outer ring is fitted to the spool 2 and rotates together with the spool 2. The spool 2 is one of the rotating bodies rotated by the motor 3 via the speed reducer 6, and the cylindrical portion 31a of the motor 3 is one of the bearing support portions. The magnetic seal mechanism 42 and the magnetic shield member 52a of the magnetic shield mechanism 52 are held between the bearing 25 and the motor holder 31 c.

The magnetic seal mechanism 42 includes a magnet 42a,

magnetic members

42b, 42c, a magnetic ring 42d, and a magnetic fluid 42 e. The magnet 42a and the

magnetic members

42b and 42c are annular. The magnetic ring 42d is a cylindrical member formed of a magnetic body, and is fitted into the inner periphery of the cylindrical portion 27 of the bobbin 2 so as to face the magnet 42a and the

magnetic members

42b and 42c without a gap. In the cross-sectional view of fig. 5, only one side of the magnetic seal mechanism 42 and the magnetic shield mechanism 52 with respect to the output shaft 32 of the motor 3 is shown, and the opposite side with respect to the output shaft 32 is omitted. The magnet 42a is sandwiched between the

magnetic members

42b and 42 c. Gaps are formed between the magnet 42a, the

magnetic members

42b and 42c, and the magnetic ring 42 d.

The magnet 42a, the magnetic member 42b, the magnetic ring 42d, and the magnetic member 42c form a magnetic circuit. When the bobbin 2 is not a magnetic body, the magnetic ring 42d is fitted to form a magnetic circuit. The magnetic fluid 42e is the same as the magnetic fluid 41d of the magnetic seal mechanism 41. Since the portion of the magnetic ring 42d facing the magnet 42a and the

magnetic members

42b and 42c is magnetized, the magnetic fluid 42e is held in the region surrounded by the magnet 42a, the

magnetic members

42b and 42c, and the magnetic ring 42 d. Gaps between the magnet 42a, the

magnetic members

42b and 42c, and the magnetic ring 42d are sealed with a magnetic fluid 42e, and foreign matter is prevented from penetrating into the bearing 25. The magnetic seal mechanism 42 has high sealing performance against gas because the inner periphery of the magnetic ring 42d in close contact with the bobbin 2 is filled with liquid without a gap.

The magnetic shield member 52a is disposed between the magnetic seal mechanism 42 and the bearing 25, that is, on the motor 3 side of the magnetic seal mechanism 42, so as to surround the periphery of the cylindrical portion 31a of the motor 3. The magnetic shield member 52a is an annular member formed of a magnetic body. A magnetic shield member 52b is attached to at least the inner periphery of the cylindrical portion 31a of the motor 3 where the magnetic seal mechanism 42 is located. The magnetic shield member 52b is cylindrical along the inner periphery of the cylindrical portion 31 a. Further, a magnetic shield member 52c is attached to a surface of the motor holder 31c which the end of the cylindrical portion 31a abuts. The

magnetic shield members

52a, 52b, 52c constitute a magnetic shield mechanism 52. The magnetic flux leaking from the motor 3 near the bearing 25 portion on the motor 3 side is attracted to and passes through the

magnetic shield members

52a, 52b, and 52c, and hardly leaks from the

magnetic shield members

52a, 52b, and 52c to the magnetic seal mechanism 42 side. As a result, the magnetic seal mechanism 42 is shielded from the magnetism of the motor 3. Since the magnetic seal mechanism 42 is not affected by magnetism of the motor 3, the magnetic fluid 42e is stably held in the region surrounded by the magnet 42a, the

magnetic members

42b and 42c, and the magnetic ring 42d, and stable waterproof performance can be maintained.

As described above, the magnetic fluid 42e is stably held in the region surrounded by the magnet 42a, the

magnetic members

42b and 42c, and the magnetic ring 42 d. Therefore, the magnetic seal mechanism 42 conducts heat of the motor holder 31c heated by the rotational operation of the electric motor 3 to the cylindrical portion 27 via the magnet 42a, the

magnetic members

42b and 42c, the magnetic fluid 42e, and the magnetic ring 42 d. As a result, stable heat radiation performance can be maintained in the bobbin 2.

The

magnetic shield members

52a, 52b, 52c have the same relative magnetic permeability as the

magnetic shield members

51a, 51b of the magnetic shield mechanism 51. Similarly to the

magnetic shield members

51a, 51b, the

magnetic shield members

52a, 52b, 52c may be formed of a magnetic sheet or a magnetic elastic body. Further, a magnetic shield member may be attached to the outer periphery of the cylindrical portion 27 protruding from the flange portion 22 of the bobbin 2 on the motor holder 31c side toward the motor holder 31c side.

In the electric reel 10 according to embodiment 1, since the

magnetic shielding mechanisms

51, 52, and 53 that shield the

magnetic seal mechanisms

41, 42, and 43 from the magnetism of the motor 3 are provided, the

magnetic fluids

41d, 42e, and 43e of the

magnetic seal mechanisms

41, 42, and 43 can be stably maintained, and stable waterproof performance can be maintained. In embodiment 1, the

magnetic shielding mechanisms

51, 52, and 53 have been described, and these

magnetic shielding mechanisms

51, 52, and 53 magnetically shield the

magnetic sealing mechanisms

41, 42, and 43 that magnetically seal the bearing 34 of the motor 3, the bearing 25 of the spool 2, and the bearing 26, respectively, but the magnetic sealing mechanisms and the magnetic shielding mechanisms are not limited to these.

The structure of the electric reel 10 according to embodiment 1 is an example, and the structure of the electric reel according to the present invention is not limited to fig. 1. The structure of the magnetic shielding mechanism is not limited to the

magnetic shielding mechanisms

51, 52, and 53. For example, the magnetic shield member may be disposed so as to surround the entire magnetic seal mechanism. In this way, the magnetic sealing mechanism can be shielded not only from magnetic interference of the motor 3 but also from other magnetic components or magnetic interference outside the electric reel 10.

[ embodiment 2]

Fig. 6 is a sectional view of the electric reel according to embodiment 2 of the present invention. The electric reel 10 according to embodiment 2 has a structure in which the electric motor 3 is disposed outside the spool 7. As shown in fig. 6, the motor 3 is arranged side by side with the spool 7, and the output shaft 32 is arranged parallel to the rotation shaft 74 of the spool 7. In fig. 6, the handle is omitted.

The bobbin 7 includes a cylindrical portion 71 and

flange portions

72 and 73 at both ends of the cylindrical portion 71. The bobbin 7 is fixed to a rotating shaft 74 penetrating the cylindrical portion 71. The rotary shaft 74 is rotatably supported by the

side plates

12 and 13 through

bearings

75 and 76, respectively, outside the

flange portions

72 and 73 on both sides of the spool 7. The

bearings

75 and 76 are fixed by fitting outer rings to the side plates (bearing support portions) 12 and 13, respectively, and the inner rings are rotated together with the spool 7 by fitting outer peripheries of the rotary shaft 74 or a gear 77 fixed to the rotary shaft 74.

The housing 31 of the motor 3 is fixed so as not to move relative to the reel body 1. The output shaft 32 of the motor 3 is supported by two

bearings

33 and 34 so as to be rotatable with respect to the housing 31. Both

bearings

33 and 34 have an outer ring fitted and fixed to the housing 31 of the motor 3, and an inner ring fitted and rotated with the output shaft 32 together with the output shaft 32. An output shaft 32 of the motor 3 is attached to an input side of the reduction gear 8 including a planetary gear. The external gear 81 of the speed reducer 8 meshes with the gear 77 fixed to the rotary shaft 74 of the spool 7 via the transmission gear 82. The external gear 81 of the reduction gear 8 is rotatably supported by a bearing 83 at a boss portion of the side plate 13 on the reduction gear 8 side to which the motor 3 is attached.

The rotary shaft 74 of the bobbin 7 and the gear 77 fixed to the rotary shaft 74 are one of the rotary bodies rotated by the motor 3, and the

side plates

12 and 13 are one of the bearing supports. The bobbin 7 rotates relative to the

side plates

12, 13, so there is a gap between the bobbin 7 and the

side plates

12, 13. Since water penetrates through the gap, the

magnetic sealing mechanisms

44 and 45 seal the

bearings

75 and 76 on the spool 7 side. The

magnetic shield mechanisms

54, 55 shield the

magnetic seal mechanisms

44, 45 from magnetic interference of the motor 3.

Further, candidates for using the magnetic sealing mechanism include the bearing 34 on the reduction gear 8 side of the motor 3 and the bearing 83 of the external gear 81 of the reduction gear 8. The magnetic seal mechanism 41 and the magnetic shield mechanism 51 of the bearing 34 on the reduction gear 8 side of the motor 3 are the same as those of embodiment 1. Since the outer ring rotates and the inner ring is fixed with respect to the bearing 83 of the outer gear 81, the bearing is similar to the bearing 25 on the motor 3 side of the bobbin 2 in embodiment 1. The magnetic seal mechanism and the magnetic shield mechanism used for the bearing 83 can be configured in the same manner as the magnetic seal mechanism 42 and the magnetic shield mechanism 52 of embodiment 1.

Fig. 7 is a sectional view of a bearing portion of the bobbin of embodiment 2. Fig. 7 shows a portion of the upper side of fig. 6 where the rotation shaft 74 of the bobbin 7 does not penetrate the bearing 75 on the side of the side plate 12. Facing fig. 7, the motor 3 is disposed on the right side. The bearing 75 is fixed by fitting an outer ring into a recess of the side plate 12, and the inner ring is rotated together with the rotary shaft 74 (the spool 7) by fitting the rotary shaft 74 into the inner ring. The magnetic seal mechanism 44 is disposed on the spool 7 side of the bearing 75.

The magnetic seal mechanism 44 includes a magnet 44a, magnetic members 44b, 44c, and a magnetic fluid 44 d. The magnet 44a and the magnetic members 44b and 44c are annular and surround the rotating shaft 74. The magnet 44a is sandwiched between the magnetic members 44b and 44 c. A gap is formed between the inner peripheries of the magnet 44a and the magnetic members 44b and 44c and the rotating shaft 74. In the magnetic seal mechanism 44, it is assumed that the rotary shaft 74 is formed of a magnetic material.

The magnet 44a, the magnetic member 44b, the rotary shaft 74, and the magnetic member 44c form a magnetic circuit. The magnetic fluid 44d is a substance in which ferromagnetic fine particles of several nm to ten and several nm are stably dispersed in a solvent such as a hydrocarbon oil or a fluorine oil matrix using a surfactant. Since the portion of the rotating shaft 74 facing the magnet 44a and the magnetic members 44b and 44c is magnetized, the magnetic fluid 44d is held in the region surrounded by the magnet 44a, the magnetic members 44b and 44c, and the rotating shaft 74. The gaps between the magnet 44a, the magnetic members 44b and 44c, and the rotary shaft 74 are sealed with the magnetic fluid 44d, and foreign matter is prevented from penetrating into the bearing 75 side from between the bobbin 7 and the side plate 12. The magnetic seal mechanism 44 surrounds the rotation shaft 74 with liquid, and therefore has high sealing performance against gas. Moreover, no solid contacts at the sealing portion, so that no dust is generated. Further, since no solid slip occurs in the seal portion, the loss torque is small, and the rotation performance is not easily lowered.

The magnetic shield member 54a is disposed on the bobbin 7 side of the magnetic seal mechanism 44, that is, on the motor 3 side of the magnetic seal mechanism 44, so as to surround the rotation shaft 74. Further, a magnetic shield member 54b is attached to the outer periphery of the recess of the side plate 12. Further, the magnetic shield member 54c may be continuously bonded from the magnetic shield member 54b to the surface of the side plate 12 opposite to the bobbin 7 at least at the outer peripheral portion of the recess portion on the side closer to the motor 3. The magnetic shield member 54d may be attached to the outer periphery of the recess at least on the side closer to the motor 3 on the surface of the side plate 12 closer to the bobbin 7.

The magnetic shield members 54a to 54d are formed of a magnetic material. The magnetic shielding mechanism 54 is constituted by at least

magnetic shielding members

54a and 54 b. The magnetic shield mechanism 54 may also include

magnetic shield members

54c and 54 d. The magnetic flux leaking from the motor 3 is attracted to the

magnetic shielding members

54a and 54b and passes through them in the vicinity of the bearing 75, and hardly leaks from the

magnetic shielding members

54a and 54b to the magnetic seal mechanism 44 side. As a result, the magnetic seal mechanism 44 is shielded from the magnetic interference of the motor 3. Since the magnetic seal mechanism 44 is not affected by magnetism of the motor 3, the magnetic fluid 44d is stably held in the region surrounded by the magnet 44a, the magnetic members 44b and 44c, and the rotating shaft 74, and stable waterproof performance can be maintained.

The magnetic sealing mechanism 45 and the magnetic shielding mechanism 55 of the other bearing 76 of the bobbin 7 may be configured symmetrically to those of fig. 7. The magnetic shield members 54a to 54d have the same relative magnetic permeability as the

magnetic shield members

51a and 51b of the magnetic shield mechanism 51 described in embodiment 1. Similarly to the

magnetic shield members

51a, 51b, the magnetic shield members 54a to 54d may be formed of a magnetic sheet or a magnetic elastic body.

The electric reel 10 according to embodiment 2 includes the

magnetic shielding mechanisms

54 and 55 for shielding the

magnetic seal mechanisms

44 and 45 from the magnetic interference of the motor 3, so that the magnetic fluid 44d in the

magnetic seal mechanisms

44 and 45 can be stably maintained, and stable waterproof performance can be maintained. In embodiment 2, the

magnetic shielding mechanisms

51, 54, and 55 have been described, and these

magnetic shielding mechanisms

51, 54, and 55 magnetically shield the

magnetic sealing mechanisms

41, 44, and 45 that magnetically seal the bearing 34 of the motor 3, the bearing 75 of the spool, and the bearing 76, respectively, but the magnetic sealing mechanisms and the magnetic shielding mechanisms are not limited to these.

The structure of the electric reel 10 according to embodiment 2 is an example, and the structure of the electric reel 10 according to the present invention is not limited to fig. 6. The structure of the magnetic shielding mechanism is not limited to the

magnetic shielding mechanisms

51, 54, and 55. For example, the magnetic shield member may be disposed so as to surround the entire magnetic seal mechanism. In this way, the magnetic seal mechanism can be shielded not only from magnetic interference of the motor 3 but also from other magnetic parts or magnetic interference outside the electric reel.

Description of reference numerals:

1 reel body

2 bobbin

3 electric motor

7 bobbin

10 electric winder

11 fixed plate (bearing support)

12. 13 side board (bearing support)

25. 26 bearing

32 output shaft

33. 34 bearing

31a cylinder part (bearing support part)

31b bottom (bearing support)

41. 42, 43, 44, 45 magnetic sealing mechanism

41a, 42a, 43a, 44a magnet

41b, 42b, 43b, 44b magnetic component

41c, 42c, 43c, 44c magnetic member

42d, 43d magnetic ring

41d, 42e, 43e, 44d magnetic fluid

51. 52, 53, 54, 55 magnetic shield mechanism

51a, 52a, 53a, 54a magnetic shield

51b, 52b, 54b magnetic shield member

52c, 54d magnetic shield member

74 rotating shaft

75. 76 bearing

83 bearing

Claims

1. An electric reel is characterized by comprising:

a reel body;

a spool rotatably supported by the reel body and winding a fishing line;

a motor to rotate the spool;

a bearing for rotatably supporting the rotating body rotated by the motor between the rotating body and a bearing support portion;

a magnetic sealing mechanism disposed to seal the bearing; and

a magnetic shielding mechanism shielding the magnetic sealing mechanism from magnetic interference of the motor.

2. The electric cord winder according to claim 1, wherein the magnetic shield mechanism has a magnetic shield member on the motor side of the magnetic seal mechanism.

3. The electric cord winder according to claim 2, wherein said magnetic shield mechanism covers at least a surface of said magnetic seal mechanism on the motor side with said magnetic shield member.

4. The electric reel according to claim 2 or 3, wherein the magnetic shield mechanism covers a surface of the bearing support portion on the magnetic seal mechanism side, which supports the bearing adjacent to the magnetic seal mechanism, with the magnetic shield member.

5. The electric winder according to claim 2 or 3, wherein the magnetic shield member has a relative magnetic permeability of 1000 or more.

6. The electric winder according to claim 2 or 3, wherein the magnetic shield member comprises a magnetic sheet.

7. The electric winder according to claim 2 or 3, wherein the magnetic shield member comprises a magnetic elastic body formed of an elastic material.

8. The electric reel according to any one of claims 1 to 3, wherein the rotating body is an output shaft of the motor, and the magnetic seal mechanism is provided in the form of a sealed bearing that rotatably supports the output shaft of the motor with the bearing support portion.