JP6429571B2 - Telescopic swing bar - Google Patents

Description

  The present invention is switchable between an extended state in which a small-diameter housing is pulled out with respect to a large-diameter housing and a storage state in which the small-diameter housing is stored in the large-diameter housing, and between the extended state and the contracted state. The present invention relates to a telescopic swing rod provided with a holding mechanism capable of holding in any state.

As the above-described holding mechanism, the elastic holding body 3 as a cylindrical holding body that fits and holds the upper end of the heel end in the housed state is provided at the heel side end of the heel. The elastic holder 3 forms an outward cylindrical surface 3A that fits inside the flange-side inner peripheral surface of the base rod 1, and forms a flange portion 3a at a position corresponding to the base end of the outward cylindrical surface 3A. The insertion hole 3B is formed along the axial direction so as to fit the heel-side outer fitting part 2B of the upper part 2 and the fitting protrusion 3b as a rib part is further inwardly formed in the circumferential direction 6 from the insertion hole 3B. It is provided at each location.
An inclined surface 3c having a smaller diameter toward the inner space side and connected to the insertion hole 3B is provided at the front end located on the front end side of the elastic holding body 3 so that the flange-side outer fitting portion 2B of the upper portion 2 is caused by the misalignment. Even if it inserts in the state which contact | abuts on the inclined surface 3c, the structure which guide | induces smoothly to the insertion hole 3B can be taken. A female screw 3d is provided on the flange side of the insertion hole 3B of the insertion hole 3B in the elastic holder 3 so that the bottom plug 5 is screwed (for example, Patent Document 1). .

JP 2008-131884 A (paragraph numbers [0014] to [0015], FIGS. 1 to 3)

In the said structure, the whole cylindrical holding body was formed with resin, and in the fitting protrusion as a rib part, the reaming process was performed and the fitting dimension was adjusted.
However, as will be described later, in this type of telescopic swing rod, as the number of repetitions of the so-called zooming operation for switching the original or the like to the retracted state and the extended state with respect to the main rod increases, Since the wear becomes remarkable and the fitting force is reduced, it is necessary to replace the cylindrical holder.

  A test was performed on a sample having the same structure as the cylindrical holder described in this conventional example. The result is the following table.

（１）テストに使用する筒状保持体を従来品１、２、３として３つのものを作成した。これらは、形状、リブ部４Ａの構造等同じ規格で作成している。多少、保持力にはバラツキが見られるが測定誤差の範囲である。
（２）保持力はニユートンＮ単位であり、ｋｇ表示より９，８倍程数値が高く表示される。
（３）表２におけるズーム耐久５００とあるのは、手動で前記した伸長状態と収縮状態を繰り返した回数を示す。
テスト結果を検討すると下記のようになる。
（４）テスト前には、３個平均で２２．８Ｎであるものが、海水に浸してムレ状態を確認し、その後乾燥して、保持力を測定すると、８６．１Ｎに上昇している。
（５）その後、ズーム耐久テストを５００回から２０００回までの４段階に亘って測定した。２０００回のズーム耐久テストを経ると、ムレテスト後８６．１Ｎあったものが７．７Ｎに低下し８．９％の残存率しか示せず、かつ、テスト前の２２．８Ｎに対しても３３．８％の残存率であり、耐久性が低いことが分かった。

(1) Three cylindrical holders were prepared as conventional products 1, 2, and 3 for use in the test. These are created according to the same standard such as shape and structure of the rib portion 4A. Although there is some variation in holding force, it is within the measurement error range.
(2) The holding force is in units of Newton N, and the numerical value is displayed about 9 to 8 times higher than the kg display.
(3) The zoom endurance 500 in Table 2 indicates the number of times of manually repeating the above-described extended state and contracted state.
The examination results are as follows.
(4) Before the test, the average of the 3 pieces was 22.8N. When the damp state was confirmed by immersing in seawater, and then dried, the holding power was measured and increased to 86.1N.
(5) Thereafter, the zoom endurance test was measured in four stages from 500 times to 2000 times. After 2000 zoom endurance tests, 86.1N after the murky test dropped to 7.7N, showing only a residual rate of 8.9%, and 32.8% compared to 22.8N before the test. It was found that the remaining rate was 8% and the durability was low.

  An object of the present invention is to provide a bottom structure for a telescopic swing rod having excellent durability by adding improvements to a cylindrical holding body made of a single member such as a resin.

〔Constitution〕
The characteristic configuration of the invention according to claim 1 is switchable between an extended state in which a small-diameter housing is pulled out of a large-diameter housing and a storage state in which the small-diameter housing is stored in the large-diameter housing, and the extension. In a telescopic swing rod having a holding mechanism that can be held in either the state or the contracted state,
A flexible cylindrical holder having a rib portion that press-contacts the outer peripheral surface of the butt end portion of the small-diameter casing, the storage-holding mechanism that holds the small-diameter casing in the storage state in the holding mechanism; It is composed of a buttocks ring body installed inside the buttocks end portion of the large-diameter housing with the cylindrical holder attached thereto,
Forming a mounting surface portion to be mounted on the inner peripheral surface of the buttocks end of the large-diameter housing on the buttocks ring body;
In the state where the cylindrical holder is mounted on the buttocks ring body, the cylindrical holder is arranged such that the outer peripheral surface of the cylindrical holder is positioned closer to the axial center side than the outer peripheral surface of the mounting surface portion of the buttocks ring body. The outer peripheral surface diameter of the body is formed to be smaller than the outer peripheral surface diameter of the mounting surface portion , and the effects thereof are as follows.

[Action]
That is, if the wear of the rib portion of the cylindrical holder becomes severe due to long-term use, only the cylindrical holder needs to be replaced. Since there is no need to replace the buttocks ring body, it is possible to make a firm structure using a hard material compared to the soft cylindrical holder.
Further, if the outer diameter of the butt end of the small-diameter frame is different, only the cylindrical holding body may be changed to one having a different specification, and there is no need to change the butt ring body.

〔effect〕
As described above, it has been necessary to replace the entire structure including the rib portion in the related art by making the bottom ring body and the cylindrical holding body separate components that can be assembled separately. By specializing in the body holding function and specializing in the function of attaching the butt ring body to the large-diameter frame, it was possible to provide a telescopic swing rod that can cope with wear countermeasures or change of the species .
(This is the function and effect described in claim 4 before correction)
On the other hand, in the present invention, as described above, in the state where the cylindrical holder is mounted on the bottom ring body, the outer peripheral surface of the cylindrical holder is the outer periphery of the mounting surface portion of the bottom ring body. The outer peripheral surface diameter of the cylindrical holder is formed to be smaller than the outer peripheral surface diameter of the mounting surface portion so as to be positioned closer to the shaft core side than the surface. As shown in FIG. 1 (c), this is because the cylindrical holder 4 is mounted on the bottom ring body 5 and the bottom ring body 5 is attached to the inner peripheral surface 1A of the large-diameter housing. A gap dt is formed between the outer peripheral surface 4B of the cylindrical holding body 4 and the inner peripheral surface 1A of the large diameter casing.
Therefore, even when the small diameter casing 2 is held by the cylindrical holding body 4, the outer peripheral surface 4B of the cylindrical holding body 4 bulges in the gap dt portion, and the optimum contact pressure is obtained.
Therefore, there is little change in the holding force of the cylindrical holder 4 and it can withstand long-term use.
Conventionally, since the holding force is greatly reduced due to wear of the rib portion, the initial holding force is increased. However, the initial holding force can be slightly reduced to set an appropriate holding force even in the initial state.

〔Constitution〕
According to a second aspect of the present invention, there is provided a mounting surface portion that is mounted on the inner peripheral surface of the butt end portion of the large-diameter housing and a mounting seat surface portion that is externally fitted to the cylindrical holding body. And a plurality of holes projecting inwardly of the cylindrical holder in a state where the cylindrical holder is mounted on the buttocks ring body. The rib portions are respectively provided so as to protrude from the plurality of through holes toward the internal space, and the effects thereof are as follows.

[Function and effect]
In order to attach the cylindrical holding body to the buttocks ring body, an attachment seat surface portion is formed on the buttocks ring body to position the cylindrical holding body and the buttocks ring body. As a result, the rib portion projecting toward the shaft core side from the hole in the mounting seat surface portion is positioned at the set position. Then, the tip of the rib portion is positioned on a predetermined arc shape, and can be abutted and supported as expected without being eccentric with respect to the outer peripheral surface of the butt end portion of the small-diameter frame, The fitting force can be applied appropriately.

〔Constitution〕
The characteristic configuration of the invention according to claim 3 is that the mounting surface portion of the buttocks ring body includes a heel side mounting surface portion positioned on the heel side across the mounting seat surface portion and a heel side mounting positioned on the heel side. The function and effect are as follows.

[Function and effect]
That is, since the heel side mounting surface part and the heel side mounting surface part mounted on the inner peripheral surface of the large-diameter frame with the mounting seat surface part interposed therebetween are arranged on the heel side and the heel side, A state where the holding body is attached to the buttocks ring body can be made stable.
At the same time, with the cylindrical holder attached to the butt ring body, the cylindrical holder can be protected by the heel side mounting surface portion and the heel side mounting surface portion of the butt ring body. Even when the body is made of a soft material having a strength lower than that of the buttocks ring body, damage or the like can be avoided.

〔Constitution〕
According to a fourth aspect of the present invention, the flexible cylindrical holder includes a cylindrical main body that is externally fitted to the mounting seat surface portion, and an axial core that extends from the inner peripheral surface of the cylindrical main body through the punch hole. The effect is as follows.

[Function and effect]
When the outer peripheral surface of the base end of the small-diameter casing is pressed by the plurality of rib portions projecting inwardly of the cylindrical holder and the small-diameter casing is held in the stored state, the cylindrical holder is The surface diameter is expanded to slightly increase the diameter.
In such a case, according to the conventional configuration, the portion corresponding to the cylindrical holding body and the portion corresponding to the buttocks ring body are integrally formed of resin, and the portion corresponding to the buttocks ring body The outer peripheral surface is in contact with the inner peripheral surface of the large-diameter housing. Thus, as described above, when the small diameter casing is held by the portion corresponding to the cylindrical holding body in the stored state, the outer peripheral surface of the portion corresponding to the buttocks ring body bulges. If it does so, it will be in the press-contact state pressed strongly to the internal peripheral surface of the large diameter housing which is contact | abutting, Therefore The rib part of the part corresponded to a cylindrical holding body is pressed strongly on the outer peripheral surface of a small diameter housing. This leads to wear and abrasion of the rib portion.

On the other hand, in the present invention, as described above, in the state where the cylindrical holder is mounted on the bottom ring body, the outer peripheral surface of the cylindrical holder is the outer periphery of the mounting surface portion of the bottom ring body. The outer peripheral surface diameter of the cylindrical holder is formed to be smaller than the outer peripheral surface diameter of the mounting surface portion so as to be positioned closer to the shaft core side than the surface. As shown in FIG. 1 (c), this is because the cylindrical holder 4 is mounted on the bottom ring body 5 and the bottom ring body 5 is attached to the inner peripheral surface 1A of the large-diameter housing. A gap dt is formed between the outer peripheral surface 4B of the cylindrical holding body 4 and the inner peripheral surface 1A of the large diameter casing.
Therefore, even when the small diameter casing 2 is held by the cylindrical holding body 4, the outer peripheral surface 4B of the cylindrical holding body 4 bulges in the gap dt portion, and the optimum contact pressure is obtained.
Therefore, there is little change in the holding force of the cylindrical holder 4 and it can withstand long-term use.
Conventionally, since the holding force is greatly reduced due to wear of the rib portion, the initial holding force is increased. However, the initial holding force can be slightly reduced to set an appropriate holding force even in the initial state.

〔Constitution〕
The characteristic configuration of the invention according to claim 5 resides in that the rib portion of the soft cylindrical holder is formed of soft rubber, and the function and effect thereof are as follows.

[Function and effect]
A plurality of ribs that are pressed against the outer peripheral surface of the butt end of the small-diameter frame are formed of soft rubber, particularly durable silicon rubber, so that wear of the ribs is suppressed and stable over a long period of time. Can be used.

FIG. 1A is a longitudinal side view showing a state in which the original is held in a stored state, FIG. 1B is a vertical side view showing a state in which the original is held in an expanded state, and FIG. With the attached buttocks ring attached to the base rod, there is a gap between the outer peripheral surface of the cylindrical holder and the outer peripheral surface (or inner peripheral surface of the base rod) of the tip side mounting surface portion of the hip ring body. It is a vertical side view which shows the state formed. FIG. 2 (a) is a partially longitudinal side view before assembly of a marshall, a buttocks ring body, a cylindrical holder, a makeup ring, a buttocks plug, and a cover ring body, and (b) in the buttocks ring body of FIG. 2 (a). AA line sectional view, (c) A BB line sectional view of the bottom ring body of FIG. 2A. FIG. 3 is a longitudinal side view showing a state in which the buttocks ring body, the cylindrical holding body, the decorative ring, the buttocks plug, the cover ring body is assembled and attached to the marshall. FIG. 4A is an exploded perspective view showing a state before the cylindrical holder is attached to the buttocks ring body, and FIG. 4B is a state before the hip ring body to which the cylindrical holder is attached is attached to the base rod. It is a disassembled perspective view shown. Fig.5 (a) is a side view of a cylindrical holding body, (b) is a front view, (c) is a vertical side view. FIG. 6 is a side view showing another implementation structure of the cylindrical holder.

The structure of the fishing rod A used for a rod etc. is demonstrated. As shown in FIG. 1, the fishing rod A includes a main rod 1 as a large-diameter rod, an upper portion 2 as a small-diameter rod, an upper portion 3 on the tip side of the upper portion 2, and an unillustrated Hochi rod. It is configured with a hot tip.
As shown in FIG. 1 (b), the fishing rod A stores the upper 2 in the main rod 1 as shown in FIG. The telescopic swing rod has a holding mechanism B that can be switched to a stored state and can be held in either the extended state or the contracted state.

Here, a brief description will be given of the manufacturing method of the mortar 1 and the former 2. Although not shown, a prepreg sheet is wound around a mandrel to form a bag material. Carbon fiber and other reinforcing fibers are aligned in the circumferential direction, and a prepreg sheet is formed by impregnating the aligned reinforcing fibers with a thermosetting resin such as an epoxy resin as a matrix resin, and the prepreg sheet is cut into a predetermined shape. The main pattern is then wound around a mandrel.
A plurality of prepreg sheets are wound to form a plurality of layers of cocoon material.
As the reinforcing fibers c, glass fibers and boron fibers can be used in addition to carbon fibers, and epoxy resins, phenol resins, and the like can be used as thermosetting resins. As the resin to be impregnated, a thermoplastic resin can also be used. Moreover, as a reinforced fiber of these prepregs, a carbon fiber having a tensile modulus of 20 to 60 ton / mm ² is used for the main pattern.

  The holding mechanism B includes a storage holding mechanism Ba that holds the upper 2 in the storage state, and a drawer holding mechanism Bb that pulls the upper 2 from the main rod 1 and holds the state. The storage and holding mechanism Ba has a flexible cylindrical holding body 4 formed with a rib portion 4A that is in pressure contact with the outer peripheral surface of the upper end of the upper buttocks 2 of the base 2 and the base holding 1 with the cylindrical holding body 4 attached thereto. It is comprised with the buttocks ring body 5 installed in the buttocks end part.

The storage and holding mechanism Ba will be described. The storage and holding mechanism Ba is composed of one formed on the upper part 2 and one formed on the cylindrical holding body 4 and the buttocks ring body 5 stored in the main rod 1.
As shown in FIG. 1, on the outer peripheral surface of the upper 2, the heel-side bulging portion 2 </ b> A formed bulging at the heel-side end of the upper 2 and the heel-side end gradually A heel-side bulging portion 2B having a tapered shape on the side (about 1 to 3 mm / 1000 mm) is formed. The maximum diameter of the heel-side bulging portion 2A and the intermediate diameter of the tapered intermediate position of the heel-side bulging portion 2B are set to the same diameter.

  On the other hand, the base 1 is formed with an inner peripheral surface that is increased in diameter toward the base and formed in a taper shape of about 1 to 3 mm / 1000 mm. What is necessary is just to set the internal diameter of the collar front-end | tip in the inner peripheral surface to the same internal diameter as the outer diameter of the intermediate | middle position of the said 2 tip side bulging part 2A.

  As described above, the cylindrical holding body 4 and the buttocks ring body 5 are attached to the inside of the base side end portion of the base rod 1. Although these will be described later, the storage and holding mechanism Ba is configured so that the heel-side bulging portion 2A of the top 2 is fitted to the inner periphery of the heel-side end of the base 1 and the base of the base 2 By fitting the side bulging portion 2B and the cylindrical holder 4 attached to the main rod 1, the upper portion 2 is held in the stored state as shown in FIG.

The cylindrical holder 4 will be described. As shown in FIGS. 2 to 5, the cylindrical holding body 4 includes a cylindrical main body 4 </ b> B having a cylindrical shape, and rib portions protruding from the four inner peripheral surfaces of the cylindrical main body 4 </ b> B toward the shaft core. 4A. A constant inclination guide surface 4a is formed at the front end portion of the rib portion 4A, and serves to guide the heel-side bulged portion 2B of the upper portion 2 in the axial direction. The base end of the rib portion 4A is formed on a straight surface 4b orthogonal to the axis.
The cylindrical holder 4 is made of soft rubber. Made of silicon rubber, nitrile rubber, and chloroprene rubber, which are particularly durable.

The bottom ring body 5 will be described.
As shown in FIGS. 2A, 3, and 4, the mounting surface portion 5 </ b> A and the cylindrical holding body that are attached to the inner peripheral surface of the butt end portion of the base rod 1 via the adhesive on the butt ring body 5. 4 is formed with a mounting seat surface portion 5B to which 4 is externally fitted, and through holes 5C are formed at a plurality of locations in the circumferential direction of the mounting seat surface portion 5B. The mounting surface portion 5A includes a heel side mounting surface portion 5Aa located on the heel side and a heel side mounting surface portion 5Ab located on the heel side with the mounting seat surface portion 5B interposed therebetween.

  The heel side mounting surface portion 5Aa is a predetermined thick ring body, a guide inclined surface a is formed at the opening edge of the heel side end, and the heel side bulging portion 2B of the upper 2 is formed in the axial direction. It works to guide you. The axial center length of the guide inclined surface a is half of the axial center length of the heel side mounting surface portion 5Aa. An inner peripheral surface b along the axis is formed on the base side of the guide inclined surface a.

  The heel side mounting surface portion 5Ab is a predetermined thick ring body, and forms an outer peripheral surface c having substantially the same diameter as the outer peripheral surface of the heel side mounting surface portion 5Aa from the heel side, and sequentially toward the heel side. The tip end side flange portion d having a larger diameter than the outer peripheral surface c, the connecting outer peripheral surface e having a smaller diameter than the outer peripheral surface c, and the outer peripheral surface connecting to the base end side of the connecting outer peripheral surface e with a smaller diameter than the tip side flange portion d. A heel side flange portion f having a diameter larger than that of e is formed.

  A screw shaft surface g is formed on the inner peripheral surface of the outer peripheral surface c, the heel-side flange portion d, the connecting outer peripheral surface e, and the heel-side flange portion f, so that the bottom plug 6 can be screwed. It is configured. A collar portion 5Ac projects from the collar tip end side of the screw shaft surface g, and has a configuration for receiving the collar-side end face of the upper part 2.

  As shown in FIGS. 2 to 5, a mounting seat surface portion 5 </ b> B is formed between the heel side mounting surface portion 5 </ b> Aa and the heel side mounting surface portion 5 </ b> Ab. The mounting seat surface portion 5B is formed by four connecting bodies 5Ba that are bridged between the heel side end surface of the heel side mounting surface portion 5Aa and the heel side end surface of the heel side mounting surface portion 5Ab.

  The connecting body 5Ba has a constant cross-sectional shape having an arc shape on both the outer peripheral surface and the inner peripheral surface, and corresponds to the distance between the heel side end surface of the heel side mounting surface portion 5Aa and the heel side end surface of the heel side mounting surface portion 5Ab. Have a length to Moreover, the connection state with respect to the heel side end surface of the heel side mounting surface portion 5Aa is a state that does not protrude from the outer peripheral surface and the inner peripheral surface b of the heel side mounting surface portion 5Aa. The connection state of the heel side mounting surface portion 5Ab to the heel side end surface is a state where it does not protrude from the outer peripheral surface c and the screw shaft surface g of the heel side mounting surface portion 5Ab.

With the above configuration, as shown in FIG. 4, between the heel-side end surface of the heel-side mounting surface portion 5Aa and the heel-side end surface of the heel-side mounting surface portion 5Ab, there are further four connections. Between the bodies 5Ba, there are formed openings penetrating inward and outward, and these four openings are holes 5C for fitting and positioning the four rib portions 4A of the cylindrical holding body 4 described above.
Further, the outer peripheral surface of the connecting body 5Ba forms a mounting seat surface portion 5B that receives the inner peripheral surface formed between the rib portions 4A of the cylindrical holder 4.

As for the butt ring body 5, the heel side mounting surface portion 5Aa, the connecting body 5Ba, and the heel side mounting surface portion 5Ab are integrally formed of resin. As a resin to be used, a thermoplastic resin called engineering resin, for example, nylon resin, PE, PPE, PET, PBT, ABS resin, Duracon, etc. can be used. If circumstances permit, a thermosetting resin such as a phenol resin may be used.
You may form the said shape with lightweight metals, such as titanium and aluminum.

In order to attach the cylindrical holder 4 to the butt ring body 5, as shown in FIG. 4, using the softness of the cylindrical holder 4, the inner diameter of the cylindrical holder 4 is once expanded, The heel ring body 5 is covered with the heel side mounting surface portion 5Aa and pushed toward the heel side mounting surface portion 5Ab.
Then, the four rib portions 4A respectively enter the four punched holes 5C, and the rib portions 4A protrude inward in the axial direction.

With the cylindrical holding body 4 attached to the buttocks ring body 5, as shown in FIG. 1 (c), the outer circumferential surface 4B of the cylindrical holding body 4 is the outer circumferential surface of the tip side mounting surface portion 5Aa in the buttocks ring body 5. And it is in the state which fell a little to the axial center side from the outer peripheral surface b of 5 Ab of base side mounting surface parts.
The value dt at which the outer peripheral surface 4B of the cylindrical holder 4 falls from the outer peripheral surface of the tip side mounting surface portion 5Aa of the buttocks ring body 5 is 0.1 to 0.5 mm, more preferably 0.25 mm.
From this, it can be said that the effect described in claim 4 is described.

  The storage and holding mechanism Ba has been described above. Therefore, when the base 2 is stored in the base 1, the heel-side bulging portion 2 </ b> A of the base 2 is in pressure contact with the inner peripheral surface of the end of the base of the base 1, and the base of the base 2 The side bulging portion 2B is in pressure contact with the inner peripheral surface of the rib portion 4A of the cylindrical holder 4 on the heel side, and the stored state is maintained.

  The pull-out holding mechanism Bb includes a heel-side bulging portion 2b of the upper portion 2 and an inner peripheral surface of the heel-side end portion of the heel portion 1 where the heel-side bulging portion 2b of the upper portion 2 is pressed from the inside. It is formed. Accordingly, the heel-side bulged portion 2b of the base 2 is pulled out from the retracted state of the base 2 shown in FIG. In the state where it is in pressure contact with the inner peripheral surface, the original 2 drawn state appears.

As shown in FIG. 2A and FIG. 3, a metal decorative ring 6 is attached to the bottom ring body 5. The decorative ring 6 is a ring with an L-shaped cross section having a certain axial length, and an L-shaped corner portion 6A is placed on the heel side heel part d from the heel side to provide a heel side mounting surface part. It is fitted on the outer peripheral surface c of 5Ab.
The outer peripheral surface of the corner portion 6A is exposed to exhibit decorativeness.

  As shown in FIG. 3, a butt plug 7 is screwed to the rear end of the butt ring body 5. As shown in FIGS. 1 to 4, the bottom plug 7 is made of a synthetic resin, and a male screw portion 7 a is formed on the outer peripheral surface of the body portion on the heel side. A space is formed inside, and a large-diameter knob portion 7A is formed on the butt end side of the male screw portion 7a. A slot-like insertion hole 7b into which an appropriate operation tool such as a coin is inserted is formed on the end face on the buttock side of the large-diameter knob 7A. The insertion hole portion 7b is a bag-like hole portion formed by bulging the end surface on the heel side toward the heel side, and is used for drainage on the back side wall portion 7d located on the heel side of the bag-like hole portion. A hole 7c is provided. An O-ring 8 is attached to the end of the external thread side of the male screw portion 7a.

A cover ring body 9 is provided outside the bottom plug 7. The cover ring body 9 is made of soft synthetic rubber as an elastic body, and is a cylindrical member made of soft synthetic rubber. On the inner surface side, a flat portion 9B is formed within a certain range from the front end side of the flange, and a recessed annular groove 9A is formed closer to the flange side than the flat portion 9B. On the outer peripheral surface side, protruding portions 9C are formed at a plurality of locations in the circumferential direction, and are formed on the finger-hanging portions.
When attaching the cover ring body 9 to the buttocks ring body 5, when the flat portion 9B is elastically deformed to get over the heel side heel part f of the butt ring body 5, the finger-hook part is strongly on the heel side. It can be applied forcibly by pushing it in.

The recessed annular groove 9A is placed on the heel side flange portion f of the bottom ring body 5, and the flat surface portion 9B on the heel side of the recessed annular groove 9A is distal to the heel side flange portion f of the bottom ring body 5. The cover ring body 9 is attached to the buttocks ring body 5 in contact with the flat portion e on the side.
As a result, the bottom plug 7 is covered, and the bottom plug 7 is less likely to loosen around.

  In order to attach the above components to the base rod 1, the makeup ring 6 is attached to the buttocks ring body 5, and is brought into contact with and fixed to the buttocks side collar portion d of the buttocks ring body 5. Next, the cylindrical holding body 4 is mounted on the mounting seat surface portion 5B while covering the opening from the heel end side of the buttocks ring body 5 while expanding the opening. In this case, the four rib portions 4A protrude from the hole 5C of the mounting seat surface portion 5B to the axial center side.

  In this manner, the bottom ring body 5 on which the decorative ring 6 and the cylindrical holding body 4 are mounted is inserted into the inner peripheral surface 1 </ b> A of the main rod 1 and bonded and fixed. That is, the heel side mounting surface portion 5Aa of the butt ring body 5 is inserted from the heel end opening of the heel 1 and pushed in until the decorative ring 6 contacts the heel end edge of the heel 1. An adhesive is applied to the outer peripheral surfaces of the heel side mounting surface portion 5Aa and the heel side mounting surface portion 5Ab, and the bottom ring body 5 is bonded and fixed in a state where it is pushed to a predetermined position.

  When the base 2 is stored in the base 1 equipped with the holding mechanism B, the base 2 bulged portion 2B of the base 2 is pressed against and held by the rib 4A of the cylindrical holder 4, and the base 2 is stored. State is maintained. When the base 2 is pulled out from this stored state, the heel-side bulged portion 2B of the base 2 comes into pressure contact with the inner peripheral surface of the heel end of the base 1 and the extended state is maintained.

  As described above, the test was conducted to determine how much the holding force of the cylindrical holding body 4 fluctuates repeatedly between the extended state and the contracted state. The results are shown in Table 2.

（１）テストに使用する筒状保持体４を発明品１、２、３として３つのものを作成した。これらは、形状、リブ部４Ａの構造等同じ規格で作成したが、表２をみられると分かるように、保持力にはバラツキが見られる。
（２）保持力はニユートンＮ単位であり、ｋｇ表示より９，８倍程数値が高く表示される。
（３）表２におけるズーム耐久５００とあるのは、手動で前記した伸長状態と収縮状態を繰り返した回数を示す。
テスト結果を検討すると下記のようになる。
（４）テスト前の３個平均で５９．５Ｎであるものが、７０℃×２４時間の耐候テストを経た後も５９．１Ｎを維持している。
（５）更に、―２０℃×２４時間の耐候テストを経た後も５７．２Ｎを維持している。このような耐候テストを経た後も、保持力の残存率としては、９６．２％を維持している。
（６）次の資料は、別の耐候テストを行った後に、更に、ズーム耐久テストを繰り返しおこなって、保持力の変化を確認した。耐候テストとしては、海水に浸してムレ状態を確認し、その後乾燥して、保持力を測定した。
（７）海水ムレテスト後乾燥した場合の保持力は５２，９Ｎである。その後、ズーム耐久テストを５００回から３５００回までの７段階に亘って測定した。３５００回のズーム耐久テストを経ても８５．８％の残存率を示し、更には、テスト前の５２，９Ｎに対しても７６％の残存率を示し、耐久性が高いことを証明した。

(1) Three cylindrical holders 4 were prepared as inventions 1, 2, and 3 for use in the test. These were created in accordance with the same standards such as the shape and the structure of the rib portion 4A, but as can be seen from Table 2, the holding force varies.
(2) The holding force is in units of Newton N, and the numerical value is displayed about 9 to 8 times higher than the kg display.
(3) The zoom endurance 500 in Table 2 indicates the number of times of manually repeating the above-described extended state and contracted state.
The examination results are as follows.
(4) The average of 39.5N before the test is maintained at 59.1N even after a weather resistance test of 70 ° C. × 24 hours.
(5) Furthermore, 57.2 N is maintained even after passing through a weather resistance test of −20 ° C. × 24 hours. Even after undergoing such a weather resistance test, the retention rate of 96.2% is maintained.
(6) In the following materials, after another weather resistance test, the zoom durability test was further repeated to confirm the change in holding force. As a weather resistance test, a damp state was confirmed by immersing in seawater, then dried, and the holding power was measured.
(7) The holding power when dried after seawater testing is 52,9N. Thereafter, the zoom endurance test was measured in seven stages from 500 times to 3500 times. Even after 3500 zoom endurance tests, it showed a residual rate of 85.8%, and further showed a residual rate of 76% with respect to 52,9N before the test, demonstrating high durability.

[Another embodiment]
(1) Another embodiment structure of the bottom ring body 5 will be described. As shown in FIG. 6, the tip side mounting surface portion 5Aa and the mounting seat surface portion 5B have the same configuration. However, the heel side mounting surface 5Ab is slightly different. That is, the shaft center length of the heel side mounting surface portion 5Ab is made longer than that described above. Moreover, the outer diameter of the mounting surface increases in a stepped manner as it is located closer to the base side.

In this case, if the same outer diameter as the outer diameter D of the tip side mounting surface portion 5Aa is the outer diameter of the mounting surface located on the tip side among the stepped mounting surfaces, the inner peripheral surface 1A of the base rod 1 When attached, the buttocks ring body 5 is tightly fitted. As shown in FIG. 6, when the same outer diameter as the outer diameter D of the heel side mounting surface portion 5Aa is the outer diameter of the mounting surface located on the heel side of the stepped mounting surface, When attached to the surface 1A, the buttocks ring body 5 is fitted relatively loosely.
Thus, the fitting state can be set differently.

  Since it can be taken longer than the axial center length of the heel side mounting surface portion 5Aa, it is possible to apply the adhesive only to the heel side mounting surface portion 5Ab. If it does so, there also exists an effect that it can avoid beforehand that the adhesive agent applied to tip side mounting surface part 5Aa moves to cylindrical holder 4 side.

  The invention of the present application is not limited to a telescopic ridge such as a heel, but can be applied to the bottom structure of an external guide ridge, a guide-less heel, or a through-through heel.

DESCRIPTION OF SYMBOLS 1 Genroku 1A Inner peripheral surface 2 Original top 4 Cylindrical holder 5 Butt ring

Claims (5)

It is possible to switch between an extended state in which the small-diameter housing is pulled out with respect to the large-diameter housing and a storage state in which the small-diameter housing is housed in the large-diameter housing, and in either the extended state or the contracted state In a telescopic swing rod with a holding mechanism that can also hold
A flexible cylindrical holder having a rib portion that press-contacts the outer peripheral surface of the butt end portion of the small-diameter casing, the storage-holding mechanism that holds the small-diameter casing in the storage state in the holding mechanism; It is composed of a buttocks ring body installed inside the buttocks end portion of the large-diameter housing with the cylindrical holder attached thereto,
Forming a mounting surface portion to be mounted on the inner peripheral surface of the buttocks end of the large-diameter housing on the buttocks ring body;
In the state where the cylindrical holder is mounted on the buttocks ring body, the cylindrical holder is arranged such that the outer peripheral surface of the cylindrical holder is positioned closer to the axial center side than the outer peripheral surface of the mounting surface portion of the buttocks ring body. A telescopic swing rod having an outer peripheral surface diameter smaller than the outer peripheral surface diameter of the mounting surface portion .   The bottom ring body is formed with a mounting surface portion to be mounted on the inner peripheral surface of the buttocks end portion of the large-diameter housing and a mounting seat surface portion to which the cylindrical holding body is externally mounted, and the periphery of the mounting seat surface portion A plurality of rib portions projecting inward of the cylindrical holding body in a state in which punch holes are formed at a plurality of locations in the direction and the cylindrical holding body is mounted on the buttocks ring body, respectively, 2. The telescopic swing rod according to claim 1, wherein the telescopic swing rod is protruded from the punched hole toward the internal space. The expansion / contraction of Claim 2 which comprises the said mounting surface part of the said butt ring body by the heel side mounting surface part located in the heel side, and the heel side mounting surface part located in the heel side across the said mounting seat surface part. Formula swinging trap. The flexible cylindrical holder includes a cylindrical main body that is externally fitted to the mounting seat surface portion, and a rib portion that protrudes from the inner peripheral surface of the cylindrical main body toward the shaft core through the punch hole. The telescopic swing rod according to claim 2 or 3 , comprising:   The telescopic swing rod according to any one of claims 1 to 4, wherein a rib portion of the soft cylindrical holder is formed of a soft rubber.

Images