JP2009050392A - Rod-like device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent a backlash of the outer shaft and the inner shaft, secure a detent, improve the assemblage and downsize the device in a rod-like device. <P>SOLUTION: The rod-like device 100 is formed by inserting the inner shaft 20 in a hollow part of the outer shaft 10 and axially extendably connecting them, a V-shaped rib 11 extended in the axial direction in the inner face of the outer shaft 10 and a V-shaped groove 21 extended in the axial direction of the inner shaft 20 are slidably engaged each other, the outer shaft 10 has an anti-vibration member 30 sandwiching the V-shaped rib 11 and the center shaft of the same and protruding inward from the opposite side hollow portion wall face, and a V-shaped convex portion 32 is slidably engaged while pushing and pressing the V-shaped convex portion 32 of the anti-vibration member 30 to a V-shaped concave portion 22 extended in the axial direction of the inner shaft 20 by the elastic force of an elastic member 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rod-shaped tool such as a cleaning tool.

As a cleaning tool rod-shaped tool, as described in Patent Document 1, there is one in which an inner shaft is inserted into a hollow portion of an outer shaft and is connected to be extendable in the axial direction. This rod-shaped tool incorporates an inner shaft from the base end portion of the outer shaft and is connected to be able to expand and contract in the axial direction, and the locking projection of the elastic arm provided on the base end portion of the inner shaft is connected to the distal end side and the base end of the outer shaft. By engaging and disengaging with the through holes provided on the respective sides, the most extended state and the most contracted state are set. Then, a flange portion provided on the base end side of the outer surface of the inner shaft is brought into contact with a stepped stopper portion provided on the distal end side of the inner surface of the outer shaft to prevent the outer shaft and the inner shaft from coming off. The outer shaft and the inner shaft are prevented from rotating by engaging the protrusions provided on the flange portion of the inner shaft with the non-rotating sliding recess extending in the axial direction of the inner surface, and the end cap is provided at the base end of the outer shaft. It is configured by fitting.
JP2004-49628

The rod-shaped tool described in Patent Document 1 has the following problems.
(1) With the rod-like tool in the most extended state and the most contracted state, the locking projection of the elastic arm provided at the proximal end portion of the inner shaft fits into the through holes provided at the distal end side and the proximal end side of the outer shaft. The movement of the outer shaft and the inner shaft in the axial direction is restricted, but the locking projection and the through hole are in a locked state due to a slight gap (play) for smoothly inserting the locking projection. Axial play remains. In addition, since a gap for smooth expansion and contraction is required between the inner shaft and the outer shaft, radial backlash remains in the locked state (there is no backlash between the outer shaft and the inner shaft because there is no structure for suppressing backlash). Tsuku).

  (2) The outer shaft and the inner shaft are prevented from rotating by simply engaging the protruding portion of the flange portion of the inner shaft with the non-rotating sliding recess of the outer shaft, and the gap between the recessed portion and the protruding portion. The backlash remains for the minute. Therefore, in the shaft connecting portion, if the shaft is left in three directions, the axial direction, the radial direction, and the circumferential direction, and the shafts are connected in multiple stages, the backlash of each connecting portion is added and a large backlash is generated between the hand and the tip. For this reason, it not only lacks a reliable detent, but also lowers the texture of the product.

  (3) A stopper provided on the front end side of the inner surface of the outer shaft is engaged with a flange portion provided on the base end side of the outer surface of the inner shaft to prevent the inner shaft from coming off. It is necessary to incorporate from the proximal end of. That is, in a multistage telescopic rod-like tool in which an inner shaft is inserted into an outer shaft and a small-diameter inner shaft is inserted by the inner shaft (becomes an intermediate outer shaft), the small-diameter inner shaft is moved from the tip of the outer-diameter outer shaft. I can't put it in. In addition, the elastic arm locking projection provided on the base end of the inner shaft is locked in the through hole provided on the outer shaft so that the extended state of both can be locked. When the locking projection of the elastic arm is provided at the base end, the inner shaft with a smaller diameter must already be inserted into the intermediate outer shaft, and the inner shaft with the second smallest diameter is the inner shaft with the second smallest diameter. It is necessary to insert all the inner shafts in order so that the second inner diameter shaft is inserted into the second inner diameter shaft. When the assembly of the plurality of shafts of the multistage telescopic rod-like tool cannot be performed in parallel, if the pre-process is delayed, the post-process is played and the assembly work efficiency is poor.

  Further, in this rod-shaped tool, it is necessary to incorporate the small-diameter inner shaft from the base end portion of the large-diameter outer shaft, and a member larger than the inner diameter of the large-diameter outer shaft cannot be provided at the distal end portion of the small-diameter inner shaft. Therefore, in order to connect the support body (head portion) to the tip of the minimum diameter inner shaft, it is necessary to provide a special-shaped connecting means (support handle 7) at the tip of the minimum diameter inner shaft, and the number of parts cannot be reduced. In addition, the tip of the minimum diameter inner shaft needs to be provided with a notch for providing the connecting means, and may be damaged.

  Moreover, in this rod-shaped tool, since the latching protrusion of the elastic arm is provided at the base end portion of the inner shaft, the length of the handle is increased by this amount. Further, since it is necessary to insert the inner shaft from the base end portion of the outer shaft, it is necessary to fit the cap to the base end portion of the outer shaft, and the length of the handle becomes longer by the fitting length of this cap. . As a result, the length of the handle becomes uselessly long.

  (4) The flange portion provided on the base end side of the outer surface of the inner shaft is engaged with the stepped stopper portion provided on the distal end side of the inner surface of the outer shaft to prevent the outer shaft from being removed. Over the entire length overlapping with the inner shaft, the diameter becomes larger by the amount of the stepped portion of the stepped stopper portion. In other words, the difference between the diameters of the outer shaft and the inner shaft is (thickness required for structural strength + stopper step) × 2 + gap, and this difference becomes a large barrier in the case of multi-stages. Therefore, it is difficult to design a compact multistage stretchable pattern.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rod-shaped tool that can reliably prevent backlash between the outer shaft and the inner shaft, reliably prevent rotation, improve assemblability, and achieve compactness.

  The invention according to claim 1 is a rod-shaped tool in which an inner shaft is inserted into a hollow portion of the outer shaft and connected to be extendable in the axial direction, and the V-shaped rib extends in the axial direction of the inner surface of the outer shaft; A V-shaped groove extending in the axial direction of the inner shaft is slidably engaged with each other, and the outer shaft projects inward from the opposite hollow wall surface with the V-shaped rib and its central axis in between. The V-shaped protrusion of this bracing member is slidably engaged while being pressed against the V-shaped recess extending in the axial direction of the inner shaft by the elastic force of the elastic member, A fitting concave portion is formed in a part of the V-shaped concave portion of the inner shaft with which the portion engages, and is formed deeper than the concave portion, and the V-shaped protruding portion of the bracing member is urged by the elastic force of the elastic member. The V-shaped protrusion and the fitting recess of the anti-vibration member have substantially the same curved surfaces that are fitted to each other in the axial direction and the circumferential direction of the outer shaft and the inner shaft. Those were.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first fitting recess and the second fitting concave portion are provided on each of the leading end side and the opposite leading end side in the pulling direction with respect to the outer shaft of the inner shaft. The joint recess is provided with an inclined surface on the wall surface connected to the V-shaped recess extending to the intermediate side of the inner shaft, and provided with a vertical surface on the wall surface facing this, and the second fitting recess is formed on the inner shaft. An inclined surface is provided on the wall surface on the side connected to the V-shaped concave portion extending to the middle side, and a vertical surface is provided on the opposite wall surface.

  Invention of Claim 3 is the cleaning tool using the rod-shaped tool of Claim 1 or 2.

(Claim 1)
(a) The V-shaped protrusion of the bracing member provided on the outer shaft is pressed against the V-shaped concave portion of the inner shaft by the pressing force caused by the biasing force of the elastic member, and against the V-shaped concave portion of the inner shaft. The opposite V-shaped groove sandwiching the central axis is pressed against the opposite-side V-shaped rib sandwiching the central axis with respect to the outer shaft bracing member. Therefore, the inner shaft is prevented from rotating with respect to the outer shaft in the radial direction and circumferential direction in the cross section, and is prevented from rotating. In addition, since the V-shaped protrusion of the anti-vibration member of the outer shaft is in pressure contact with the V-shaped recess of the inner shaft, the inner shaft slides with respect to the outer shaft in the axial direction by frictional force.

  (b) A part of the V-shaped concave portion of the inner shaft with which the V-shaped projection of the bracing member engages is formed deeper than the concave portion, and the V-shaped projection of the bracing member is biased by the elastic force of the elastic member. Thus, the fitting concave portion to be fitted is provided, and the V-shaped protrusion and the fitting concave portion of the anti-vibration member make their curved surfaces fitting with each other in the axial direction and the circumferential direction of the outer shaft and the inner shaft substantially the same. Accordingly, the V-shaped protrusion of the outer shaft anti-vibration member is fitted into the inner shaft fitting recess to stop the movement of the outer shaft and the inner shaft in the axial direction. Since the curved surfaces of the V-shaped protrusions and the fitting recesses are substantially the same in the direction, there is no backlash in the axial direction, the radial direction, and the circumferential direction in the movement stop state.

(Claim 2)
(c) When the movement is stopped in the most contracted state where the first fitting recess of the inner shaft is fitted to the V-shaped protrusion of the anti-vibration member of the outer shaft, the inner shaft is the vertical surface of the first fitting recess. Is prevented from being pushed further by abutting against the V-shaped protrusion of the bracing member. The inner shaft can be freely moved in the pull-out direction by the slope of the first fitting recess smoothly pushing up the V-shaped protrusion of the anti-vibration member.

  (d) When the movement is stopped in the most extended state in which the second fitting recess of the inner shaft is fitted to the V-shaped protrusion of the anti-vibration member of the outer shaft, the inner shaft is a vertical surface of the second fitting recess. Is prevented from being pulled out (prevented from coming off) by abutting against the V-shaped protrusion of the anti-vibration member. The inner shaft can be freely moved in the push-in direction when the slope of the second fitting recess smoothly pushes up the V-shaped protrusion of the anti-vibration member.

  (e) The inner shaft is prevented from coming off by a collision between the second fitting recess provided on the inner shaft and the V-shaped protrusion of the outer shaft's anti-vibration member. There is no need to provide a stepped stopper portion (small diameter portion) on the inner surface of the portion. Therefore, the inner shaft can be inserted from the tip of the outer shaft.

  At this time, since the bracing member is urged by the elastic member and provided on the outer shaft, the assembly is completed simply by inserting the inner shaft with the bracing member set on the outer shaft.

  Similarly, when assembling a multi-stage telescopic shaft, after setting the anti-vibration member on each outer shaft (axis other than the smallest diameter shaft), in any order (from the smallest diameter axis or the largest diameter axis, from the middle But it's okay so just plug in the inner shaft.

  Further, since the proximal end portion of the inner shaft is inserted from the distal end portion of the outer shaft, assembly is possible even when a cleaning head or the like is integrally provided at the distal end of the inner shaft.

  In addition, since it is not necessary to provide a stepped stopper on the inner surface of the outer shaft tip, the difference in diameter between the inner shaft and the outer shaft can be reduced. That is, the difference in diameter is the thickness necessary for the structural strength × 2 + gap. The number of stages can be increased, and the length at the time of reduction can be made compact while maintaining the length at the time of extension.

  Further, since the base end portion of the inner shaft is not provided with a conventional elastic arm locking projection, the wasteful length due to this can be eliminated from the total length of the rod-shaped tool. Further, since the inner shaft can be inserted from the distal end portion of the outer shaft, it is not necessary to fit a cap to the base end portion of the outer shaft, and the waste length due to this can be eliminated from the entire length of the rod-shaped tool. Accordingly, the length of the rod-shaped tool is not wasted, and if the length of the rod-shaped tool at the time of contraction is the same as the conventional length, the length at the time of expansion becomes longer by the amount excluding the waste length.

(Claim 3)
(f) In the cleaning bar, the above-described (a) to (e) can be realized.

  FIG. 1 is a perspective view showing the most extended state of the cleaning tool and its rod-like tool, FIG. 2 is a perspective view showing the most contracted state of the cleaning tool and its stick-like tool, and FIG. 3 shows a state where a cleaning sheet is attached to the cleaning tool. FIG. 4 is a perspective view showing an exploded state of the rod-shaped tool, FIG. 5 is a perspective view showing a broken main portion of the rod-shaped tool in the most contracted state, and FIG. 6 is a key diagram of the rod-shaped tool in the most contracted state. FIG. 7 is a perspective view showing an intermediate extension state of the rod-like tool, FIG. 8 is a cross-sectional view showing a cross-section of the rod-like tool in the intermediate extension state, and FIG. 9 shows main parts of the rod-like tool. It is a perspective view disassembled and shown.

  As shown in FIGS. 1 to 3, the cleaning tool 1 has a proximal end portion of the angle adjustment arm 200 connected to the most distal end portion of the rod-shaped tool 100, and a cleaning head via a head joint 300 at the distal end portion of the angle adjustment arm 200. 400 is connected, and the cleaning sheet 500 is attached to and detached from the mounting plate 401 of the cleaning head 400 for use. Hereinafter, the rod-shaped tool 100 will be described.

  As shown in FIGS. 1 to 4, the rod-shaped tool 100 has a second shaft (pipe) 102 in the hollow portion of the hollow first shaft (pipe) 101 and a hollow portion in the hollow portion of the second shaft 102 that is hollow. A third shaft (pipe) 103 is connected to a hollow portion of the third shaft 103 in such a manner that a fourth shaft (solid rod) 104 is inserted in that order so as to be expandable and contractable in the axial direction. Thereby, the cleaning head 400 connected to the rod-shaped tool 100 can be positioned and used from the user's hand to the remote. FIG. 1 shows the most expanded state, and FIG. 2 shows the most contracted state.

  In the rod-like tool 100, the first shaft 101 and the second shaft 102 constitute a pair of the outer shaft 10 and the inner shaft 20 of the present invention that are connected to each other, and the second shaft 102 and the third shaft 103 are connected to each other. The outer shaft 10 and the inner shaft 20 of the invention are configured, and the third shaft 103 and the fourth shaft 104 constitute the outer shaft 10 and the inner shaft 20 of the present invention which are connected to each other. Hereinafter, the description will be made assuming that the outer shaft forming one set of the present invention is 10 and the inner shaft is 20 (FIGS. 5 to 9).

  As described above, the rod-like tool 100 is configured such that the inner shaft 20 is inserted into the hollow portion of the outer shaft 10 and is extendably connected in the axial direction.

  As shown in FIGS. 5 to 8, the rod-shaped tool 100 includes a V-shaped rib 11 that extends in the axial direction of the inner surface of the outer shaft 10 and a V-shaped groove 21 that extends in the axial direction of the outer surface of the inner shaft 20. Are slidably engaged with each other.

  As shown in FIGS. 5 to 8, the outer shaft 10 includes a V-shaped rib 11 and a bracing member 30 that protrudes inwardly from the hollow wall surface on the opposite side in the diametrical direction across the central axis. The curved surface-like V-shaped protrusion 32 provided on the inner surface side of the main body 31 of the anti-vibration member 30 is slidably engaged while being pressed against the V-shaped recess 22 extending in the axial direction of the inner shaft 20 by elastic force. (Press contact).

  In the present embodiment, the anti-vibration member 30 is the upper surface (in the outer shaft 10) of the distal end side thick portion 12 of the outer shaft 10 (the side closer to the cleaning head 400 in the axial direction of the outer shaft 10 is the distal end side of the outer shaft 10). A window hole 13 is opened in the surface of the mounting plate 401 facing the surface opposite to the surface to be cleaned (floor surface or the like) as the upper surface of the outer shaft 10), and the main body 31 of the anti-vibration member 30 is connected to the window hole 13. To load. As shown in FIG. 9, the anti-vibration member 30 includes a depression-preventing flange portion 31 </ b> A provided on the outer surface side of the main body 31 on the upper surface of the thick portion 12 of the outer shaft 10 and around the opening of the window hole 13. Unrestricted depression into the window hole 13 is prevented by colliding with the abutting portion 13A. An elastic member 40 made of a C-shaped ring spring is attached to ring attachment grooves 12A and 31B provided on the outer periphery of the thick portion 12 of the outer shaft 10 and the outer surface of the main body 31 of the anti-vibration member 30, respectively. The V-shaped protrusion 32 of the anti-vibration member 30 urged toward the inside of the window hole 13 by the elastic force of the elastic member 40 is pressed against the V-shaped recess 22 of the inner shaft 20 and the V-shaped groove of the inner shaft 20. 21 is pressed against the V-shaped rib 11 of the outer shaft 10.

  The inner surface of the main body 31 of the anti-vibration member 30 forms an overhang portion 33 that protrudes from both sides of the V-shaped protrusion 32 along the circumferential direction of the outer periphery of the inner shaft 20, and the overhang portion 33 is formed on the inner shaft 20. There is a slight gap between the outer periphery of

  As shown in FIG. 4, the rod-shaped tool 100 includes first and first bracing members 30 on the outer shaft 10 side that are fitted on the leading end side and the opposite tip side of the inner shaft 20 with respect to the outer shaft 10. Two curved surface fitting recesses 23 and 24 are provided.

  The first fitting recess 23 of the inner shaft 20 is connected to the V-shaped recess 22 extending to the intermediate side of the inner shaft 20, and the V-shaped recess 22 with which the V-shaped protrusion 32 of the anti-vibration member 30 engages. It is formed deeper. When the outer shaft 10 and the inner shaft 20 are set to the most contracted state (FIGS. 5 and 6), the anti-vibration member 30 is urged by the elastic force of the elastic member 40 and is fitted into the first fitting recess 23. Then, the outer shaft 10 and the inner shaft 20 are brought into a movement stopped state. At this time, as shown in FIG. 6, the first fitting recess 23 and the bracing member 30 have their curved surfaces that are fitted and pressed against each other in the axial direction and the circumferential direction of the outer shaft 10 and the inner shaft 20. It is almost the same. In addition, as shown in FIGS. 4 and 6, the first fitting recess 23 of the inner shaft 20 is provided with a slope 23A on the wall surface on the side connected to the V-shaped recess 22 of the inner shaft 20, and is perpendicular to the opposite wall surface. A surface 23B is provided.

  The second fitting recess 24 of the inner shaft 20 is connected to the V-shaped recess 22 extending to the intermediate side of the inner shaft 20, and the V-shaped recess 22 with which the V-shaped protrusion 32 of the anti-vibration member 30 engages. It is formed deeper. When the outer shaft 10 and the inner shaft 20 are set to the most extended state, the anti-vibration member 30 is urged by the urging force of the elastic member 40 and is fitted into the second fitting recess 24. At this time, the second fitting recess 24 and the anti-vibration member 30 have substantially the same curved surfaces that are fitted and pressed against each other in the axial direction and the circumferential direction of the outer shaft 10 and the inner shaft 20. Further, as shown in FIG. 4, the second fitting recess 24 of the inner shaft 20 is provided with a slope 24A on the wall surface on the side connected to the V-shaped recess 22 of the inner shaft 20, and a vertical surface 24B on the wall surface facing this. Provide.

  In the present embodiment, the cross-sectional shapes of the outer shaft 10 and the inner shaft 20 are oval with non-circular cross sections that are substantially similar to each other, as shown in FIG. When 500 is placed on a surface to be cleaned such as a floor surface, the long axis of the ellipse in the cross section of the first shaft 101 which is the outermost outer shaft 10 is positioned on the vertical line, and the first shaft 101 is gripped by the user. Easy grip.

According to the present embodiment, the following operational effects can be obtained.
(a) The V-shaped protrusion 32 of the anti-vibration member 30 provided on the outer shaft 10 is pressed against the V-shaped recess 22 of the inner shaft 20 by the pressing force caused by the urging force of the elastic member 40, and the inner shaft 20 The opposite V-shaped groove 21 sandwiching the central axis with respect to the V-shaped recess 22 is pressed against the opposite V-shaped rib 11 sandwiching the central axis with respect to the retaining member 30 of the outer shaft 10. Therefore, the inner shaft 20 is prevented from rotating with respect to the outer shaft 10 in the radial direction and the circumferential direction in the transverse section and is stopped. Further, since the V-shaped protrusion 32 of the anti-vibration member 30 of the outer shaft 10 is in pressure contact with the V-shaped recess 22 of the inner shaft 20, the inner shaft 20 slides relative to the outer shaft 10 in the axial direction due to frictional force. To do.

  (b) A part of the V-shaped recess 22 of the inner shaft 20 with which the V-shaped protrusion 32 of the anti-vibration member 30 engages is formed deeper than the recess so that the V-shaped protrusion 32 of the anti-vibration member 30 is an elastic member. The fitting recesses 23 and 24 that are urged and fitted by the elastic force of 40 are provided, and the V-shaped protrusion 32 and the fitting recesses 23 and 24 of the anti-vibration member 30 are in the axial direction of the outer shaft 10 and the inner shaft 20. The curved surfaces that fit together in the circumferential direction are generally the same. Accordingly, the V-shaped protrusion 32 of the anti-vibration member 30 of the outer shaft 10 is fitted into the fitting recesses 23 and 24 of the inner shaft 20 to stop the movement of the outer shaft 10 and the inner shaft 20 in the axial direction. Since the curved surfaces of the V-shaped protrusion 32 and the fitting recesses 23 and 24 in the axial direction and the circumferential direction of the shaft 10 and the inner shaft 20 are substantially the same, the axial direction and the radial direction in the movement stop state thereof. No play in the circumferential direction.

  (c) When the movement of the inner shaft 20 is stopped in the most contracted state where the first fitting recess 23 of the inner shaft 20 is fitted to the V-shaped protrusion 32 of the bracing member 30 of the outer shaft 10, the inner shaft 20 The vertical surface 23B of the fitting recess 23 abuts on the V-shaped protrusion 32 of the anti-vibration member 30 to prevent further pressing. The inner shaft 20 can freely move in the pull-out direction when the slope 23A of the first fitting recess 23 smoothly pushes up the V-shaped protrusion 32 of the anti-vibration member 30.

  (d) When the movement of the inner shaft 20 in the fully extended state where the second fitting recess 24 of the inner shaft 20 is fitted to the V-shaped protrusion 32 of the anti-vibration member 30 of the outer shaft 10 is stopped, When the vertical surface 24B of the fitting recess 24 abuts on the V-shaped protrusion 32 of the anti-vibration member 30, further pulling is prevented (prevented from coming off). The inner shaft 20 can be freely moved in the pushing direction by the slope 24A of the second fitting recess 24 smoothly pushing up the V-shaped protrusion 32 of the anti-vibration member 30.

  (e) Since the inner shaft 20 is prevented from coming off by the abutment of the second fitting recess 24 provided on the inner shaft 20 and the V-shaped protrusion 32 of the anti-vibration member 30 of the outer shaft 10, the above-described conventional example is provided. Thus, there is no need to provide a stepped stopper portion (small diameter portion) on the inner surface of the outer shaft 10 tip. Therefore, the inner shaft 20 can be inserted from the tip of the outer shaft 10.

  At this time, since the anti-vibration member 30 is urged by the elastic member 40 and is provided on the outer shaft 10, the assembly can be performed simply by inserting the inner shaft 20 with the anti-vibration member 30 set on the outer shaft 10. Complete.

  Similarly, when assembling a multistage telescopic shaft, after setting the anti-vibration member 30 on each outer shaft 10 (axis other than the shaft with the smallest diameter), in any order (from the smallest diameter shaft or the largest diameter shaft, You can insert the inner shaft 20 (even from the middle).

  Further, since the proximal end portion of the inner shaft 20 is inserted from the distal end portion of the outer shaft 10, assembly can be performed even when a cleaning head or the like is provided integrally at the distal end of the inner shaft 20.

  Further, since it is not necessary to provide a stepped stopper portion on the inner surface of the tip of the outer shaft 10, the difference in diameter between the inner shaft 20 and the outer shaft 10 can be reduced. That is, the difference in diameter is the thickness necessary for the structural strength × 2 + gap. The number of stages can be increased, and the length at the time of reduction can be made compact while maintaining the length at the time of extension.

  Further, since the base end portion of the inner shaft 20 is not provided with a conventional elastic arm locking projection, a wasteful length due to this can be eliminated from the overall length of the rod-shaped tool 100. Further, since the inner shaft 20 can be inserted from the distal end portion of the outer shaft 10, it is not necessary to fit a cap to the proximal end portion of the outer shaft 10, and the waste length due to this can be eliminated from the entire length of the rod-shaped tool 100. As a result, the length of the rod-shaped tool 100 is not wasted, and if the length of the rod-shaped tool 100 at the time of contraction is the same as the conventional length, the length at the time of extension becomes longer by eliminating the above-mentioned waste length.

  (f) In the cleaning rod 100, the above (a) to (e) can be realized.

FIG. 1 is a perspective view showing a cleaning tool and its rod-like tool in the most extended state. FIG. 2 is a perspective view showing the most contracted state of the cleaning tool and its rod-shaped tool. FIG. 3 is a perspective view showing a state in which the cleaning sheet is attached to the cleaning tool. FIG. 4 is a perspective view showing an exploded state of the rod-shaped tool. FIG. 5 is a perspective view of the main part of the rod-shaped tool in the most contracted state, broken away. FIG. 6 is a side view of the main part of the rod-shaped tool in the most contracted state, broken away. FIG. 7 is a perspective view showing an intermediate extension state of the rod-shaped tool. FIG. 8 is a cross-sectional view showing a cross section of the rod-shaped tool in the intermediately extended state. FIG. 9 is an exploded perspective view showing the main parts of the rod-shaped tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cleaning tool 10 Outer shaft 11 V-shaped rib 20 Inner shaft 21 V-shaped groove 22 V-shaped recessed part 23 1st fitting recessed part 23A Slope 23B Vertical surface 24 2nd fitting recessed part 24A Slope 24B Vertical surface 30 Damping member 32 V-shaped protrusion 40 Elastic member 100 Bar-shaped tool

Claims (3)

A rod-shaped tool that is inserted in the hollow portion of the outer shaft and connected in an axially expandable manner,
The V-shaped rib extending in the axial direction of the inner surface of the outer shaft and the V-shaped groove extending in the axial direction of the inner shaft are slidably engaged with each other,
The outer shaft includes a V-shaped rib and a bracing member that projects inwardly from the wall surface of the hollow portion on the opposite side across the central axis, and the V-shaped projection of the bracing member is connected to the inner shaft by the elastic force of the elastic member. While slidably engaging with the V-shaped recess extending in the axial direction,
A part of the V-shaped concave portion of the inner shaft with which the V-shaped protrusion of the bracing member engages is formed deeper than the concave portion, and the V-shaped protrusion of the bracing member is urged by the elastic force of the elastic member. The fitting is provided with a fitting recess, and the V-shaped protrusion and the fitting recess of the anti-vibration member are rod-like tools having substantially the same curved surfaces that are fitted to each other in the axial direction and the circumferential direction of the outer shaft and the inner shaft. First and second fitting recesses are provided on each of the leading end side and the non-tip end side in the pulling direction with respect to the outer shaft of the inner shaft,
The first fitting recess is provided with a slope on the wall surface on the side connected to the V-shaped recess extending to the intermediate side of the inner shaft, and provided with a vertical surface on the opposite wall surface,
2. The rod-shaped tool according to claim 1, wherein the second fitting recess is provided with a slope on the wall surface on the side connected to the V-shaped recess extending to the intermediate side of the inner shaft, and a vertical surface is provided on the wall surface facing the slope. .   A cleaning tool using the rod-shaped tool according to claim 1.

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