CN100446666C

CN100446666C - Threading transfer machanism and fishing line wheel seat therewith

Info

Publication number: CN100446666C
Application number: CNB031045014A
Authority: CN
Inventors: 原田孝文
Original assignee: Shimano Inc
Current assignee: Shimano Inc
Priority date: 2002-02-18
Filing date: 2003-02-14
Publication date: 2008-12-31
Anticipated expiration: 2023-02-14
Also published as: KR100947804B1; CN1439258A; TWI260200B; JP2003235411A; JP3948978B2; KR20030069062A; TW200500002A

Abstract

The present invention is to provide s a screw thread mechanism having improved screw forwarding operability compared with conventional mechanisms. The mechanism is provided with a male screw member having a male screw composed of a spiral groove having nearly constant width on the outer circumference and a rotary member fit on the outer circumference of the male screw and rotated relative to the male screw member. The male screw has a varying pitch region to continuously change the pitch between the grooves of at least a part of the male screw. The mechanism is further provided with an engaging means to engage with a part of the length of the groove to meet the change of the pitch between the grooves. The engaging means is rotated together with the rotary member according to the rotation of the rotary member and, at the same time, shifted in longitudinal direction in the groove to shift the rotary member along the axial direction in a state guided with the groove.

Description

Screw thread connecting gear and equip the reel holder of this mechanism

Technical field

The present invention relates to the screw thread connecting gear and equip the reel holder of this mechanism.

Background technology

On the fishing rod that the fishing line reel use is installed, the reel holder of fixing this fishing line reel foot is installed, this reel holder constitutes the installation portion of fishing line reel.This reel holder has a variety of, has a kind of outside that is flush-mounted in fishing rod pole body, the reel holder of the tubulose of the use that is fixed.This reel holder constitute the axis direction that is held on reel holder by foot with fishing line reel, fishing line reel is fixed in fishing rod, the cover of a pair of clamping fishing line reel foot before and after having.One side's cover is irremovable fixed cover vertically, and the opposing party's cover is transportable movable hood vertically.

Be commonly referred to as the reel holder cylindraceous of nut type, it constitutes: move the axial outboard end that rotatably is connected in movable hood with nut (rotary part), by the screw thread connecting gear movable hood is moved vertically.That is, move the external thread part that is combined on the outer peripheral face that is formed on cylindric seat body with nut, should move by rotation and use nut, movable hood is moved vertically by this screw thread transmission.

Specifically, in fixing fishing line reel, an end of fishing line reel foot is inserted in the fixed cover, move it to fastening side with nut by rotating to move, make movable hood near fixed cover, in the other end insertion movable hood with fishing line reel foot, with the foots of two cover clamping fishing line reels.

On the other hand, when taking off fishing line reel, opposite spin is moved with nut and is made it to loosening side shifting, makes to be connected to move with the movable hood on the nut to loosening side promptly axial outer side shifting.Like this, mobile movable hood makes the foot of fishing line reel extract from two covers, and fishing line reel is taken off from reel holder (fishing rod).

Like this, when the loading and unloading fishing line reel, need make movable hood move longer distance vertically, on the other hand, need guarantee the fixedly sufficient fastening force of fishing line reel, also need to prevent to move becoming flexible simultaneously with nut.

For fast moving need become big lead angle, become big helical pitch and pitch, but for the secure fixation fishing line reel, helical pitch, pitch are little favourable.Therefore,, make the pitch assurance fastening force that diminishes, but so, the revolution that rotation is moved with nut becomes many, the improvement of operability in the time of need seeking to load and unload fishing line reel now for the secure fixation fishing line reel.

This problem is especially remarkable at the reel holder place, but also be to use in all common problems of the screw thread connecting gear at following position, that is, the stroke that the screw thread at this position transmits is longer, and the interval of seeking high screw thread transfer rate mixes with the interval of seeking the low thread transfer rate.

Summary of the invention

Therefore, the present invention is in view of above-mentioned existing issue point, with compare now that to improve the operability that screw thread transmits be problem.

The present invention carries out in order to solve above-mentioned problem, screw thread connecting gear of the present invention has externally threaded item and rotary part, wherein, externally threaded item has at outer peripheral face and forms the roughly external thread part of the spiral groove of certain width, rotary part be embedded in outward the outer peripheral face of external thread part and relatively externally threaded item make rotary manipulation; It is characterized by: external thread part has certain and pitch ratio fine pitch interval big coarse pitch interval, pitch continually varying pitch constant interval of pitch between the certain fine pitch interval of pitch, groove; And, the matching mechanism of a part of the length direction of mating groove is set for the variation of pitch between corresponding groove; Along with the rotation of rotary part, matching mechanism and the rotation of rotary part one are moved along length direction in groove simultaneously, and like this, rotary part is that guiding moves vertically with the groove.

In addition, so-called " externally threaded item is made rotary manipulation relatively " not only refers to the fixedly occasion of externally threaded item, rotation rotary part, also comprises conversely the fixedly occasion of rotary part, rotation externally threaded item.

For this formation, if rotary part rotates in external screw thread department relatively, because matching mechanism matches with the part of the length direction of groove, so even the pitch between pitch constant interval groove changes, corresponding, matching mechanism and rotary part become one, and in the axis rotation, can move along length direction in groove.So comprising the pitch constant interval serves as that the guiding rotary part moves vertically with the groove of external thread part, so by setting the pitch constant interval of corresponding use, the speed that screw thread is transmitted changes.Therefore, for example, in the total travel that screw thread transmits, wish to carry out relatively fast the zone that screw thread transmits and wish to carry out zone that screw thread transmits at a slow speed when existing simultaneously relatively, set pitch between external thread part grooves, can carry out the screw thread transmission with the speed that adapt to different intervals by cooperating these speed.

In addition, wish to be provided with continuously the certain and interval big coarse pitch interval of pitch ratio fine pitch of pitch between pitch is certain between groove fine pitch interval and groove at external thread part at pitch constant interval two ends.Be arranged between the whole district external thread part the pitch constant interval also can, but interval and the pitch constant interval is set in the centre by big or small two pitch are set, can be by purposes with the clearly separately use of big or small two pitch intervals.

And then, wish externally threaded item and rotary part radially in the middle of, at a position cooperation ball is set as matching mechanism, but cooperates the constant and rotation of the relative rotary part relative position of ball, the rotation by rotary part cooperates ball to rotate along length direction in groove.By cooperating ball to be arranged on a radially middle position of externally threaded item and rotary part, when the rotation rotary part, cooperate ball and rotary part to become one, and in rotation, in groove, rotate along length direction, though, can under the little state of rotary load, rotate rotary part smoothly so constitute simply.

In addition, as mentioned above, can will cooperate ball to be arranged on wherein as matching mechanism, but also can give prominence to and engagement protrusion is set replaces cooperating ball as matching mechanism at position of rotary part inner peripheral surface, in this case, by outstanding this simple formation of engagement protrusion is set at a position, can corresponding reliably pitch constant interval.

Like this, the occasion of engagement protrusion is being set, it is possible forming by moulding etc., but also can fitting pin be installed at rotary part, and the leading section of fitting pin is outstanding to the inner peripheral surface of rotary part, constitutes above-mentioned engagement protrusion by the leading section of this fitting pin.In the occasion of this formation, because fitting pin is other object, so fitting pin can adopt the big parts of intensity, as metal system.So, the abundant easily intensity that guarantees engagement protrusion.

In addition, hope is radially middle externally threaded item and rotary part, and then auxiliary ball is set is matching mechanism, should rotate along its length direction by being rotated in the groove of rotary part by auxiliary ball, for the variation of pitch between corresponding groove, should assist ball to be set to relative rotary part can only relatively move vertically.As mentioned above, outside the cooperation ball that the rotary part relative position is constant relatively, the auxiliary ball that relative rotary part can only move axially relatively is set again, like this, when suppressing loosening between rotary part and the externally threaded item, can reduce the rotary load of rotary part, improve durability.

And then, wish auxiliary ball to be set in the position relative 180 ° with cooperating ball.Auxiliary ball can be arranged on the optional position by the relative engagement ball, but especially is arranged on 180 ° of positions in opposite directions, can suppress the loosening of rotary part effectively, and rotary part is rotated more smoothly, also is gratifying aspect durability.

In addition, hope will assist ball to be arranged on a plurality of positions, and like this, durability, flatness, loosening inhibition effect are improved.

In addition, reel holder of the present invention, it is the fixing reel holder of fishing line reel foot, has seat body cylindraceous, movable hood and rotary part, wherein, seat body has at outer peripheral face and forms the roughly external thread part of the spiral groove of certain width, movable hood is set at this seat body and can moves vertically, outside the rotary part of the axial outside of this movable hood, be embedded in seat body external thread part outer peripheral face and be rotated operation, it is characterized by: external thread part has the certain fine pitch interval of pitch, certain and the interval big coarse pitch interval of pitch ratio fine pitch of pitch between groove, pitch continually varying pitch constant interval; The pitch towards between the groove of axial inboard of this pitch constant interval diminishes, variation for the pitch between corresponding groove, the matching mechanism of a part of the length direction of mating groove is set, along with the rotation of rotary part, matching mechanism and rotary part one and rotation are moved along its length direction in groove simultaneously, like this, rotary part is that guiding moves vertically with the groove, and in axial moving, movable hood moves vertically by this rotary part.

In addition, the foot's side with fishing line reel among the present invention is axial inboard, with its opposition side be the axial outside.That is, fishing line reel fixation side (fastening side) is axial inboard, and fishing line reel open sides (unclamping side) is the axial outside.

The fixing occasion of fishing line reel on the reel holder of this formation, the rotation rotary part also makes movable hood to axial inboard, the fixation side that is fishing line reel moves, then owing to diminish in pitch constant interval pitch between the side direction groove in axially, fast moving can be carried out in the position of leaving the fishing line reel fixed position that fixedly is at reel holder, can carry out moving at a slow speed near the position of fishing line reel fixed position, and guarantee big fastening force.

At this moment, the pitch constant interval two ends that are preferably in external thread part are provided with the certain and interval big coarse pitch interval of pitch ratio fine pitch of pitch between pitch is certain between groove fine pitch interval and groove continuously, and the fine pitch interval is in axial inboard, and the coarse pitch interval is in the axial outside.Being arranged to the pitch constant interval between the whole district with external thread part also can, but it is interval and the pitch constant interval is set in the centre by big or small two pitch are set, the people of fishing can arrive the existence in two pitch intervals of size and operate rotary part by clear understanding, can be in the coarse pitch interval move fastening securely and fixing fishing line reel like a cork in the fine pitch interval.

Description of drawings

Fig. 1 is the half side cross section of the reel holder of expression an embodiment of the invention.

Fig. 2 is to use in the outside drawing of the external thread part of the seat body of same reel holder.

Fig. 3 is the extension mode figure of the significant points of same reel holder.

Fig. 4 is the ideograph of the external thread part of same reel holder.

Fig. 5 represents the significant points of the reel holder of other embodiment, (A) is cross section, (B) is outside drawing.

Fig. 6 is that the significant points of the reel holder of other embodiment enlarges cross section.

Fig. 7 is the ideograph of significant points of the reel holder of other embodiment of expression.

Fig. 8 represents the significant points of the reel holder of other embodiment, (A) is cross section, (B) is the P-P line cross section of (A).

Embodiment

Below with reference to Fig. 1 to Fig. 3 the embodiment of the reel holder that uses thread transmission of the present invention is described.As shown in Figure 1, the reel holder of present embodiment has: seat body 1 (externally threaded item), fixed cover 2, movable hood 3 and mobile with nut 4 (rotary part), wherein seat body 1 is tubulose (cylindric), and at one end the side outer peripheral face has external thread part 10, fixed cover 2 outer the other end of adorning and being fixed in this seat body 1, movable hood 3 in axial direction is loaded on an end side of seat body 1 movably outward, moves with the axis direction outside of nut 4 in this movable hood 3 to be embedded in external thread part 10 and can be rotated operation.In addition, seat body 1 and fixed cover 2 also can form.

Move chimeric and can be connected to the axial outboard end of movable hood 3 with the relative rotation with nut 4, rotation is moved with nut 4, as described below, employ nut 4 and movable hood 3 becomes one and in axial direction inside and outside move by this screw thread transmission shifter, like this, can regulate two distances of covering between 2,4.Wherein, move and also can be the structure that is not connected with movable hood 3 with nut 4.Even in this case, use nut 4 to axial inboard precession by moving, movable hood 3 can and can be clamped in axis direction with the foot of fishing line reel near fixed cover 2 sides.

In addition, do not represent in the drawings, on the external thread part 10 of seat body 1, form the linearity metallic channel that extends vertically, be matched with this gathering sill by ledge with movable hood 3, with this gathering sill is guiding, and movable hood 3 can move vertically relative to seat body 1, but can not rotate.

In addition, such reel holder is fixed on the pole body 100 of the fishing rod shown in Fig. 1 chain-dotted line by outer dress.Under this situation, movable hood 3 can become pole point side, also can become pole tail side.That is, by the reel holder of above-mentioned tubulose is installed, at the outer peripheral face of fishing rod external thread part 10 is set on the pole body 100 of the fishing rod of present embodiment, fixedly the fishing line reel installation portion of the foot of fishing line reel is made of reel holder.

Get back to Fig. 1, in the present embodiment, the formation of external thread part 10 and mobile usefulness nut 4 is with different in the past.At first, different at the outer peripheral face width of external thread part 10 channel shaped curl unanimous on the whole with pitch between former groove (following claims pitch) certain structure, have pitch continually varying pitch constant interval at axial mid portion.Concrete condition as shown in Figure 2, external screw thread 10 is by in turn three intervals constitute from the axial outside, comprising: coarse pitch interval 11, fine pitch interval 12 and pitch constant interval 13, coarse pitch interval 11 be arranged at an axial end and pitch certain; Fine pitch interval 12 is adjacent to the lift-launch face 5 that carries fishing line reel foot, and pitch ratio coarse pitch interval 11 is little and pitch is certain; Pitch constant interval 13 is arranged between the two

pitch intervals

11,12, and the pitch P 2 of its pitch from the pitch P 1 in coarse pitch interval 11 to fine pitch interval 12 changes continuously.That is, pitch constant interval 13 diminishes towards its pitch of axial inboard.

In addition, be embedded in the outer peripheral face of this external screw thread 10 outward and be rotated operation mobile its integral body is cylindric with nut 4, and inner circumferential surface do not have internal thread, is level and smooth inner peripheral surface, its internal diameter forms that big or small roughly the external diameter with external screw thread 10 is identical.So the outer peripheral face of external screw thread 10 and the inner peripheral surface that moves with nut 4 are the relation of sliding.And, move and match by the part of matching mechanism with the length direction of the groove of external screw thread 10 with nut 4.In the present embodiment, move with nut 4 and external screw thread 10 radially between a cooperation ball 20 as matching mechanism is arranged.Concrete condition moving a position using nut 4, is provided with the ball hole 21 to the inner peripheral surface opening as shown in Figure 3.This ball hole 21 is to the outer peripheral face that moves usefulness nut 4 also opening, and radially perforation between outer peripheral face and inner peripheral surface.Cooperate ball 20 to insert this ball hole 21 and wherein a part of outstanding from inner peripheral surface, ledge is matched with the groove of external thread part 10.Cooperate ball 20 can insert ball hole 21, do not rock, promptly relative position is constant, and can oneself rotate.In addition, ring 22 is embedded in outward to move and is capped with nut 4 and by this outside of encircling 22 ball holes 21, so, cooperate ball 22 certain, and can prevent to cooperate ball 20 to come off from ball hole 21 to the overhang of inner peripheral surface.

Begin to rotate from the state of Fig. 3 and move with nut 4, then move with nut 4 and cooperate ball 20 to become one, and around the axis rotation, cooperate ball 20 to rotate along its length direction in groove, mobile outer peripheral face with nut 4 slides mutually with the outer peripheral face of external screw thread 10.And, though moving with nut 4 is guiding with the groove, move by the screw thread transmission vertically, even but mobile way from coarse pitch interval 11 to fine pitch interval 12 pitch constant interval 13, because only the cooperation ball 20 at a position cooperates, so the variation of the corresponding pitch of energy can be moved to fine pitch interval 12 smoothly.So, leave fishing line reel fixed position R and do not needing the coarse pitch interval 11 of the big power that screws, can realize little rotation number, big amount of movement.That is, can move with nut 4 and movable hood 3 towards axial inboard fast moving.In addition, if near fishing line reel fixed position R, then can move to fine pitch interval 12 by pitch constant interval 13, mobile at a slow speed movable hood 3 can be anchored on the foot of fixed cover 2 and fishing line reel axially simultaneously.At this moment, because little in interval 12 pitch P 2 of fine pitch, promptly lead angle is little, thus can guarantee big fastening force and can be reliably fixing fishing line reel, and, can suppress to move the dropout naturally of using spiral shell 4 because lead angle is little.

In addition, with fishing line reel when reel holder takes off, though anti-the operation owing to can will move with nut 4 to axial outside fast moving, so fishing line reel can be taken off fast at coarse pitch interval 11 under the sort of situation.

Especially, make pitch constant interval 13 between the centre, two

pitch intervals

11,12 are set at two ends, like this, the people of fishing can offer an explanation the difference of pitch easily, and rotary manipulation moves with nut 4 can easily load and unload fishing line reel.

In addition,,, make to cooperate ball 20 in groove, to rotate, use nut so can rotate smoothly to move by cooperating ball 20 because it constitutes as matching mechanism.

In addition, the groove of external thread part 10 also can be a コ shape as shown in Figure 2, and the cooperation that also can form as shown in Figure 4 cooperates the circular-arc of ball 20.

In addition, as shown in Figure 5, as matching mechanism, can so that move with nut 4 and external screw thread 10 radially in the middle of be provided with and assist ball 23.In addition, Fig. 5 (B) is depicted as and unloads the outward appearance that ring 22 back states move down a part of employing nut 4.

For example, 180 ° of relative positions in ball hole 21 form the slotted hole 24 that extends vertically that passes radially, cover this slotted hole 24 by above-mentioned ring 22.Can relatively move vertically at these slotted hole 24 auxiliary 23 in balls, but and the insertion of rotation ground, groove is given prominence to and be matched with to a part wherein from moving with the inner peripheral surface of nut 4, rotates along its length direction.When auxiliary ball 23 rotates in groove, because auxiliary ball 23 is mobile vertically in slotted hole 24, so the variation of the corresponding pitch of energy.In addition, the axial length of slotted hole 24 is bigger than the variable quantity of pitch.Like this, by auxiliary ball 23 is set at the relative position that cooperates ball 20, at external screw thread 10 with move can rotate under the state with the dead in line of nut 4 and move with nut 4, the outer peripheral face of external screw thread 10 and the slippage loss of moving with the inner peripheral surface of nut 4 tail off, and can smoothly rotate the mobile nut 4 of using.In addition, when auxiliary ball 23 is set, especially when relative position is provided with, cooperate the burden of ball 20 to be alleviated, cooperate the durability of ball 20 self also to be enhanced, and, the durability of reel holder can be improved.In addition, auxiliary ball 23 is set also can at a plurality of positions.At this moment, a plurality of auxiliary balls 23 each other can be in circumferential arranged spaced, vertically arranged spaced.

In addition, replace ball, also can engagement protrusion be set moving to give prominence to a position of the inner peripheral surface of nut 4 between wherein formation.For example, can form by the ejection formation of synthetic resin and move with nut 4, and form engagement protrusion, also can be as shown in Figure 6, moving with nut 4 upper edge approximate diameter directions installation fitting pins 30, its leading section 30a is outstanding from moving with the inner peripheral surface of nut 4, and the leading section 30a of this fitting pin 30 constitutes engagement protrusion.Because the leading section 30a of fitting pin 30 matches with groove, so its view profile is preferably circle, in addition, the leading section 30a of fitting pin 30 is preferably dome shape.In addition, if fitting pin 30 is that threaded engagement is in the formation that moves with nut 4, the overhang of then regulating leading section 30a easily.No matter that is a kind of, if engagement protrusion is the formation from fitting pin 30, then because fitting pin 30 is a metal system etc., easy proof strength is so favourable aspect durability.Like this, the constituent ratio that engagement protrusion is set uses the formation that cooperates ball to be easy to assembling.

In addition, the section configuration of the leading section 30a of fitting pin 30 is not limited to above-mentioned circle, for example also can be square.View profile is under the square situation, and as shown in Figure 7, which groove in the size of section configuration coarse pitch interval 11 or fine pitch interval 12 for no matter all can embed.

In addition, as the formation that alleviates the matching mechanism burden, the variation of corresponding lead angle can be provided with and shake component is matching mechanism.For example, as shown in Figure 8, will be arranged at the roughly rectangular component 40 that circumferencial direction extends and be arranged with in the recess 41 that moves with the inner peripheral surface of nut 4.At the outstanding fulcrum 42 that is provided as rotating fulcrum of the substantial middle portion of the length direction of these component 40 outsides, move by this fulcrum and to be turned the earth's axis with nut 4 and prop up.On the other hand, but a plurality of ball 43 along length direction separate decide the inside that at interval rotation ground embeds component 40, the part of this ball 43 is given prominence to and is matched with in the groove of external thread part 10 from moving with the inner peripheral surface of nut 4.And the limit rotation is moved with nut 4 limits it is moved vertically, and component 40 is that fulcrum shakes with fulcrum 42, corresponding to the variation of the lead angle that is caused by the variation of pitch.In addition, for the use level of groove, the ball 43 of central authorities is big, two balls 43 at both ends are little.In addition, the formation that replaces ball 43 to cooperate, the outstanding formation that also can adopt the inside part of component 40 to cooperate with groove with groove.

In addition, though the reel holder that adopts the screw thread connecting gear is illustrated, screw thread connecting gear of the present invention as tail plug or pole closedtop plug etc., can be used for multiple position to removing other position of reel holder.

In addition, can a plurality of thread variations interval be set at external thread part, in addition, also can be with all intervals as the pitch constant interval.

And then though the situation to single thread is illustrated in the above-mentioned embodiment, many screw threads also can.Under the situation of many screw threads, because a plurality of matching mechanisms can be set, so can obtain the stable of rotary part.For example can in every screw thread, dispose one and cooperate ball 20.So, because can press the matching mechanism of cooperation ball 20 grades of the bar number configuration respective numbers of screw thread, so for example, because the matching mechanism that will cooperate ball 20 grades decentralized configuration along the circumferential direction, matching mechanism is difficult for coming off from groove, can obtain stabilizing of rotary part.

As mentioned above, in the screw thread connecting gear of the present invention, have and the corresponding matching mechanism of pitch constant interval, like this, the speed that screw thread transmits can change, so the operability of rotary part or externally threaded item was improved than in the past.

In addition, in the reel holder of the present invention, have pitch constant interval and corresponding with it matching mechanism, the interval that the pitch constant interval diminishes for the pitch towards between axial inboard and groove, like this, the operability of the rotary part that movable hood moves vertically was improved than in the past, can guarantees sufficient fastening force, the loading and unloading of fishing line reel are easier than in the past.

Claims

1. screw thread connecting gear, have externally threaded item and rotary part (4), wherein, externally threaded item has at outer peripheral face and forms the roughly external thread part of the spiral groove of certain width (10), outer outer peripheral face and the relative externally threaded item that is embedded in external thread part (10) of rotary part (4) made rotary manipulation

It is characterized by: external thread part (10) has certain and big coarse pitch interval (11), the pitch continually varying pitch constant interval (13) in pitch ratio fine pitch interval (12) of pitch between the certain fine pitch interval (12) of pitch, groove;

And be the variation of pitch between corresponding groove, the matching mechanism of a part of the length direction of mating groove is set;

Along with the rotation of rotary part (4), the rotation of matching mechanism and rotary part (4) one is moved along length direction in groove simultaneously, and like this, rotary part (4) is that guiding moves vertically with the groove.

2. as the screw thread connecting gear of claim 1 record, it is characterized by: in the radially centre of externally threaded item and rotary part (4), as matching mechanism cooperation ball (20) is set at a position, cooperate ball (20) relatively rotary part (4) but relative position is constant and rotation, the rotation by rotary part (4) cooperates ball (20) to rotate along length direction in groove.

3. as the screw thread connecting gear of claim 1 record, it is characterized by: give prominence to engagement protrusion being set at position of rotary part (4) inner peripheral surface as matching mechanism.

4. as the screw thread connecting gear of claim 3 record, it is characterized by: fitting pin (30) is installed at rotary part (4), the leading section (30a) of fitting pin (30) is outstanding to the inner peripheral surface of rotary part (4), constitutes above-mentioned engagement protrusion by the leading section (30a) of this fitting pin (30).

5. as the screw thread connecting gear of claim 2 record, it is characterized by: in the radially centre of externally threaded item and rotary part (4), and then auxiliary ball (23) is set is matching mechanism, should roll along its length direction by being rotated in the groove of rotary part (4) by auxiliary ball (23), for the variation of pitch between corresponding groove, should assist ball (23) to be set to relative rotary part (4) can only relatively move vertically.

6. as the screw thread connecting gear of claim 5 record, it is characterized by: auxiliary ball (23) is set in the position relative 180 ° with cooperating ball (20).

7. as the screw thread connecting gear of claim 5 or 6 records, it is characterized by: auxiliary ball (23) is set at a plurality of positions.

8. reel holder, it is the fixing reel holder of fishing line reel foot, have seat body cylindraceous (1), movable hood (3) and rotary part (4), wherein, seat body (1) has at outer peripheral face and forms the roughly external thread part of the spiral groove of certain width (10), and movable hood (3) is set at this seat body (1), can move vertically, outside the rotary part of the axial outside of this movable hood (3), be embedded in seat body (1) external thread part (10) outer peripheral face and be rotated operation

It is characterized by: external thread part (10) possesses certain and big coarse pitch interval (11), the pitch continually varying pitch constant interval (13) in pitch ratio fine pitch interval (12) of pitch between the certain fine pitch interval (12) of pitch, groove,

The pitch towards between the groove of axial inboard of this pitch constant interval (13) diminishes, variation for the pitch between corresponding groove, the matching mechanism of a part of the length direction of mating groove is set, along with the rotation of rotary part (4), matching mechanism and rotary part (4) one and rotation are moved along its length direction in groove simultaneously, like this, rotary part (4) is that guiding moves vertically with the groove, and in axial moving, movable hood (3) moves vertically by this rotary part (4).

9. as the reel holder of claim 8 record, it is characterized by: fine pitch interval (12) in axial inboard, coarse pitch interval (11) are in the axial outside.