JPH0429733Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backlash prevention device for a double bearing type reel, which prevents backlash by applying a load to the spool by magnetic induction.

This type of backlash prevention device is disclosed in Japanese Utility Model Application No. 57-31175. That is, as shown in FIG. 2, a conductive ring body 103 made of a non-magnetic material such as aluminum or copper is attached to the side plate of the spool 102 supported between the side plates 101 of the bearing type reel on the side that does not have the drive gear mechanism. A holding plate frame 104 that is integrally protruded and fitted and fixed to the inner surface of the side plate 101 has an annular magnet 105 having an arbitrary number of poles and a ring-shaped magnet 105 having an arbitrary number of poles fitted on the inner peripheral surface of the holding tray frame 104 so as to be located inside the conductive ring body 103. An inner magnetic pole ring 117 is attached to the holding tray frame 104, and an annular yoke 106 made of a magnetic material such as iron is attached to the inner magnetic pole ring 117.
03, an outer magnetic pole ring body 111 is fixed, which is composed of an annular magnet 109 of arbitrary polarity and an annular yoke 110 fitted on the outer peripheral surface of the annular magnet 109 and made of a magnetic material such as iron. .

In addition, a knob 115 is provided on the inner magnetic pole ring 117.
is connected via the operation stick 113, and this knob 1
15 along the arcuate hole 116, the inner magnetic pole ring 117 is moved relative to the outer magnetic pole ring 111, thereby adjusting the braking force.

Therefore, the inner and outer magnetic pole rings 117 and 111 located on the inner and outer sides of the conductive ring body 103, which rotates together with the spool 102, must be attached while maintaining a certain clearance, respectively.

The side plate 101 is an inner plate 1 provided on the spool side.
01a and a frame-shaped outer plate 101b, and the outer edge 111a of the outer magnetic pole ring 117 is engaged with a recessed portion of the slightly thin holding tray frame 104. As described above, the engagement of the magnetic pole ring 117 in the shallow recess is unstable, and its positioning is complicated. Further, a ring-shaped cover member 120 that covers the end of the spool 102 is separately attached to the inner plate 101a, and the cover member 120 is attached to the inner plate 101a.
After positioning with respect to the circular opening 101b of 1a, the end 102a of the spool 102 is housed in the cover member 120, and the clearance between the inner hole of the cover member 120 and the spool end 102a becomes large. The thread tends to get stuck in this clearance, and the cover member 1
There is a space 12 between the inner periphery of 20 and the annular yoke 111.
1 is formed, and this space 121 causes biting of the thread.

In view of these points, the present invention allows the inner and outer magnets to be reliably set with a predetermined clearance with respect to the conductive ring fixed to the spool, thereby making it possible to reliably adjust the braking force. It is an object of the present invention to provide a backlash prevention device for a double-bearing type reel, which prevents thread bite between parts.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The reel body 1 has relatively thin left and right side plates 2,
2' at a predetermined interval with the horizontal rod 3..., and the side plates 2,
A frame is formed by fixing outer plates 4, 4' to 2' with screws.

A circular window hole 2a into which the end of the spool 5 is rotatably fitted is opened in the side plates 2 and 2' on both sides, and the circular window hole 2a is connected to a flange 2b projecting inside the reel body 1. The end of the spool 5 is tightly housed within this flange 2b. On the other hand, the outer plates 4, 4' have thin wall portions 4
a, and a thick part 4b, and inside the thick part 4b, there is a mounting recess 7 for a bearing member 6 concentrically with the circular window hole 2a, and an outer magnet ring and an inner magnet ring to be described later. A magnet ring mounting recess 8 is provided. That is, each magnet ring 12,1
The inner peripheral wall 7a of the mounting recess 7 of No. 3 and the outer and inner inner peripheral walls 8a, 8b of the ring mounting recess 8 are formed concentrically, and a bearing member 6 such as a bearing is fitted into the mounting recess 7, and the retaining ring At 9, the spool 5 and the conductive ring 1 are attached to prevent the detachment.
A spool 5 is disposed between both side plates 2 and 2' by rotatably supporting a spool shaft 11 having a fixed spool shaft 11. An annular fitting groove 4c having a fitting part is formed on the inner periphery of the thick portion 4b, and the base of the flange 2b that defines the circular window hole 2a of the side plates 2, 2' is fitted into this annular groove 4c. It matches. Therefore, the thread passes between both ends of the spool 5 and the inner surface of the flange 2b, and further passes between the side plates 2, 2' and the outer plate 4,
4', a so-called thread-eating condition can be effectively avoided. Furthermore, the annular groove 4c also has the mounting recesses 7 and 8.
The circular window hole 2a can be formed concentrically with the end of the spool 5, and the circular window hole 2a can be accurately positioned with respect to the end of the spool 5.

On the other hand, annular yokes 14 and 15 are disposed on an outer inner circumferential wall 8a that is annularly formed on the radially outer side of the mounting recess 8 and an inner inner circumferential wall 8b that restricts the concentricity of the inner magnet ring 13, and at least On the other hand, in the illustrated example, an inner magnet 13 is rotatably disposed, and both magnets 12 and 13 are maintained at predetermined clearances from the inner and outer surfaces of the peripheral wall portion 10a of the conductive ring body 10, respectively.

Here, since the outer magnet ring 12 only needs to be fixed, it is fitted into the mounting recess 8, but since the inner magnet ring 13 is rotatable, a retaining ring 16 is fitted around the opening of the mounting recess 8. It is preferable to prevent the inner magnet ring 13 from detaching.

Further, the inner magnet ring 13 is integrated with an attachment 17, and the protrusion 17a provided on the attachment 17 is inserted into the window hole 4a of the outer plate 4.
The adjustment lever 18 is inserted into the adjustment lever 18 and protrudes outward, and is rotatably guided in a cam groove 18a formed linearly in the radial direction on the back surface of the adjustment lever 18, which is rotatably fitted into a recess 4b formed on the outside of the outer plate 4. be engaged so that it is fixed. By rotating the adjustment lever 18, the cam groove 18
The inner magnet ring 13 is rotated together with the attachment 17 by a, and the magnetic field is controlled by opposing or displacing the magnetic poles of both magnets, so that the braking force of the spool 5 can be adjusted.

In the figure, reference numeral 19 denotes a handle supported on the other outer plate 4', and this handle shaft and the spool shaft 11 are interlocked and connected via a gear transmission mechanism (not shown).

As explained above, in the backlash prevention device for a double-bearing reel according to the present invention, in order to apply a load to the spool 5 by magnetic induction, conductive rings 10 are arranged on the inner and outer sides of the conductive ring 10 fixed to the spool shaft 11. The inner circumferential wall 7a of the bearing member attachment recess 7 of the spool shaft 11 to be installed, and the outer inner circumferential wall 8a and inner circumferential wall 8b of the attachment recess 8 are integrally provided concentrically on the outer plate of the reel body 1, The outer magnet ring 12 is attached along the outer inner circumferential wall 8a, and the outer magnet ring 12 is attached along the outer inner circumferential wall 8a.
b, and the bearing member 6 is fitted along the inner circumferential wall 7a of the bearing member mounting recess 7.

Also, regarding after-sales service,
Anyone can disassemble the outer plate 4 and side plate 2 and assemble the bearing member 6.
Even if parts are replaced, the inner magnet ring 13, and the outer magnet ring 12, concentricity can be automatically ensured and it is easy to do, and spool replacement at the fishing spot is definitely easy to assemble for the same reason. It is. Both the mounting recesses 7 and 8 can be simply and easily formed into concentric circles, and by fitting the bearing member 6 and both the magnet rings 12 and 13 therein, the bearing member 6 is attached to the spool shaft 11. By simply supporting the spool shaft 11, both the outer and inner magnet rings 12 and 13 are attached concentrically to the spool shaft 11. Therefore, the clearance between the conductive ring 10 fixed to the spool shaft 11 and the magnet rings 12 and 13 can be kept constant, making assembly of the device simple and easy, and achieving a highly accurate backlash prevention device. Since the mechanism can be simplified, productivity is improved and the product can be provided at low cost.

Moreover, the conductive ring body 10 and the outer and inner magnet rings 1
Each clearance between 2 and 13 can be maintained at a constant value, and a magnetic field can be generated uniformly. Furthermore, both magnet rings can be installed closer together, which allows for even smaller clearances, which makes it possible to strengthen the magnets and finely adjust the braking force of the spool over a wide range. Fine adjustment of the braking force of the spool by displacing the magnetic pole can be ensured.

In addition, since the bases of the flanges 2b of the side plates 2, 2' are in direct contact with the thick wall portions 4b, the circular window holes 2a of the side plates are accurately positioned with respect to the spool ends, and thread bite can be effectively avoided.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of a double-bearing type reel equipped with a backlash prevention device according to the present invention, and FIG. 2 is a partial cross-sectional view of a double-bearing type reel equipped with a conventional backlash prevention device. It is a diagram. 1... Reel body, 2b... Flange, 4...
Outer plate, 5... Spool, 6... Bearing member, 7,
8...Mounting recess, 10...Conductive ring, 11...Spool shaft, 12...Outer magnet ring, 13...Inner magnet ring.

Claims (1)

[Scope of utility model registration request] This backlash prevention device for a double-bearing reel is configured to prevent backlash by applying a load to the spool 5 by magnetic induction. It has outer plates 4, 4' provided on the outside of the side plates 2, 2', in which the end of the spool 5 is rotatably housed, and a flange 2b defining a circular window hole 2a. The outer plates 4, 4' have a thick wall portion, and the bearing member 6 for supporting the spool shaft 11 is fitted into the bearing mounting recess 7 formed in the thick wall portion, and is fixed to the spool shaft. The outer magnet ring 12 and the inner magnet ring 13, which are arranged on the outside and inside of the conductive ring 10 to generate a magnetic field, are fitted into the magnet ring mounting recess 8 formed on the outside of the bearing mounting recess in the thick part. The bearing part mounting recess 7 and the magnet ring mounting recess 8 are provided concentrically, and the flange bases of the side plates 2 and 2' are radially outward of the magnet ring mounting recess 8 on the inner surface of the thick part. A backlash prevention device for a double-bearing reel, characterized in that a fitting portion 4c for fitting is formed.