JP2013215494A - Handle shaft folding device for kick scooter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handle shaft folding device for a kick scooter, having a handle shaft to be locked by lowering/raising it through a simple operation.SOLUTION: A handle shaft folding device for a kick scooter includes a tiltable shaft part 34 foldably connected to a base end shaft part 32 of a handle shaft via a pivot 33, and an operating sleeve 37 slidably fitted to the tiltable shaft part 34 and base end shaft part 32 externally. The tiltable shaft part 34 includes a sleeve biasing spring 43 biasing the operating sleeve 37 downward. The outer peripheral surface on both end sides of the pivot 33 are protrusively provided with guide rails 46U, 46D in parallel with the handle shaft center O of the base end shaft part 32 and the tiltable shaft part 34. The inner peripheral surface of the operating sleeve 37 includes a guide groove 47 fitted to the guide rails 46U, 46D externally. The handle shaft folding device is further provided with an upright lock mechanism 38 for automatically locking the operating sleeve 37 when the operating sleeve 37 is lowered to the lower limit, and a bending lock mechanism for automatically locking the tiltable shaft part 34 in a bent state when the operating sleeve 37 is lifted to bend the tiltable shaft part 34.

Description

  The present invention relates to a handle provided on a skater and a handle shaft folding device.

  For example, in Patent Document 1, a support frame is attached to a front portion of a kick skater via a foldable handle support, and a handle shaft is supported on the support frame so as to be rotatable about an axis.

Utility model registration No. 3075243

However, in patent document 1, the operation | movement which folds a handle shaft with a handle support implement | achieves a handle shaft, after releasing a lock lever first, and also tightens a lock lever. In the use operation for raising the handle shaft, first release the lock lever, then stand the handle shaft, and tighten the lock lever. As described above, the folding operation of the handle requires a two-step operation of releasing and tightening the lock lever, which is troublesome.
An object of the present invention is to solve the above-mentioned problems and to provide a handle shaft folding device for a skater capable of improving the operability by allowing the handle shaft to fall and stand up and lock by a simple operation. To do.

The invention described in claim 1
A handle shaft folding device for a skater for folding a handle shaft for operating a running roller provided on a board body,
A base shaft portion of the handle shaft, a tiltable shaft portion that is foldably connected to the base end shaft portion via a support shaft orthogonal to the handle shaft center, and slides on the tilt shaft portion and the base end shaft portion. An operation sleeve that is freely fitted externally,
The retractable shaft is internally provided with a biasing member that biases the operating sleeve downward,
A guide rail parallel to the handle shaft center is provided on one of the outer peripheral surface of at least one base end shaft portion and the tiltable shaft portion on both ends of the support shaft and the inner peripheral surface of the operation sleeve, and the other Forming a guide groove fitted to the guide rail,
An upright lock mechanism that automatically locks and prevents the operation sleeve from being lifted when the operation sleeve is lowered to the lower limit that fits the retractable shaft portion and the base end shaft portion;
A bending lock mechanism is provided that locks the retractable shaft portion in a bending posture when the operation sleeve is pulled up to the retractable shaft portion side and the retractable shaft portion is bent around the support shaft.

The invention according to claim 2 is the configuration according to claim 1,
The bending lock mechanism includes a locking engagement portion formed at a lower end portion of the operation sleeve, and a locking recess portion formed at a proximal end shaft portion and engageable with the locking engagement portion,
The locking engagement portion of the operation sleeve is fitted into the locking recess by the urging force of the urging member.

The invention according to claim 3 is the configuration according to claim 1 or 2,
The upright lock mechanism
A slide hole formed in the operation sleeve along the tangential direction of the sleeve hole, a lock shaft slidably accommodated in the slide hole, a retractable shaft portion and a base corresponding to the lock shaft at the lower limit of the operation sleeve A lock groove continuous with the slide hole on one of the end shaft portions, a coil spring for locking that urges the lock shaft toward the lock groove with the slide receiving hole, and an operating rod for retracting the lock shaft from the lock groove Part.

The invention according to claim 4 is the configuration according to claim 1 or 2,
The upright lock mechanism
A lock pin that protrudes from the outer peripheral surface and is urged in a protruding direction by a locking coil spring in a mounting hole provided in one of the tiltable shaft portion and the base end shaft portion, and the lock pin at the lower limit of the operation sleeve. A pin hole formed through the operation sleeve is provided at a corresponding position, and a counterbore portion is formed on the outer peripheral side of the lock hole so that the lock pin can be manually retracted to the mounting hole side.

The invention according to claim 5 is the configuration according to any one of claims 1 to 4,
In the retractable shaft portion, a housing hole for housing the biasing member is formed along the handle shaft center, and a slide hole communicating with the housing hole and the outer peripheral surface of the tiltable shaft portion is formed,
A connecting member for connecting the biasing member and the operation sleeve is slidably fitted into the slide hole.

  According to the first aspect of the present invention, since the urging member that urges the operation sleeve toward the base end shaft portion is provided in the retractable shaft portion, the clearance between the operation sleeve and the tiltable shaft portion and the base end shaft portion is provided. Can be closely fitted to each other, and rattling of the handle shaft in an upright state can be reduced. In addition, the guide rail and guide groove are formed on both ends of the support shaft at the mating surfaces of the operation sleeve, the tiltable shaft portion, and the base shaft portion, so that the bending strength around the support shaft is improved and the backlash is reduced. it can. Furthermore, the handle shaft can be locked in an upright state by the upright lock mechanism simply by releasing the bending lock mechanism and raising the tiltable shaft portion, and the operability can be improved. Furthermore, by simply releasing the upright lock mechanism and causing the tiltable shaft portion to fall down, the folding lock mechanism can lock the tiltable shaft portion in a fallen state, and operability can be improved.

  According to the second aspect of the present invention, the locking engagement portion is formed on the operation sleeve biased toward the proximal shaft portion by the biasing member, and the locking engagement is performed at the lower limit where the retractable shaft portion is bent. By fitting the mating part into the locking recess of the base end shaft part, it is possible to lock the tilting shaft part simply by lying down, and the locking operation of the lying posture can be easily performed.

  According to the third aspect of the present invention, when the upright lock mechanism is pushed down to the lower limit of the base shaft portion by the urging member, it is fitted into the lock shaft or the lock groove, and the operation sleeve is automatically locked. The standing posture can be easily locked.

  According to the fourth aspect of the present invention, when the upright lock mechanism is pushed down to the lower limit of the base shaft portion by the urging member, the lock pin is fitted into the pin hole, and the operation sleeve is automatically locked. The standing posture can be easily locked.

It is a disassembled perspective view which shows Example 1 of the handle shaft folding apparatus of the kick skater which concerns on this invention. (A)-(c) shows a handle shaft folding device, (a) is a side partial sectional view, (b) is an AA sectional view shown in (a), (c) is a B- shown in (a). It is B sectional drawing. (A), (b) shows operation | movement of a handle shaft folding apparatus, (a) is side sectional drawing of a bending state, (b) is a side view of a bending state. (A), (b) shows Example 1 of an upright lock mechanism, (a) is sectional drawing of planar view of a locked state, (b) is sectional drawing of planar view of a lock release state. It is a whole perspective view of a kick skater. (A), (b) shows a propulsion steering part, (a) is a top view, (b) is a partially cutaway side view. It is sectional drawing of planar view which shows Example 1 of an upright lock mechanism. It is a side view which shows Example 2 of the kick skater provided with the handle shaft folding device.

[Example 1]
A first embodiment of a handle shaft folding device for a kick skater according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 5, the kick skater has a propulsion steering unit 13 having a pair of left and right swing-type front wheels (traveling rollers) 12 at the front of the board body 11, and a cover-type brake 15. A rear wheel (traveling roller) 14 is provided, and a steering shaft 16 having a handle 17 at its upper end is erected on the propulsion steering unit 13. The handle shaft 16 includes a lower fixed shaft portion 16A and an extendable shaft 16B that is telescopically fitted via a fixture 18 at the upper portion of the fixed shaft portion 16A. The handle shaft folding device 31 according to the present invention. Is provided below the fixed shaft portion 16A. This kick skater can be steered by swinging the handle shaft 16 left and right while running while kicking on the road surface, and can be moved forward by obtaining forward thrust.

  That is, as shown in FIG. 6, the propulsion steering portion 13 has a pair of arm portions 22 that are inclined forward and downward to the left and right on the front wheel support portion 21 attached to the front portion of the board body 11. A swing axle 24 is swingably supported at the tip of the arm portion 22 via a forward tilt shaft 23 that is inclined forward and upward. The front wheels 12 are rotatably supported by the rear portions of the left and right swing axles 24 via a horizontal shaft 25, and the left and right swing axles 24 are connected to each other via tie rods 26. It can be swung synchronously. Further, a restoring coil spring 27 is connected between the rear portion of the swing axle 24 and the center member 21a of the front wheel support portion 21, and urges the front wheel 12 to be in a straight traveling posture. Therefore, when a force that turns the front wheels 12 to the left and right acts on the propulsion steering unit 13, the propulsion steering unit 13 is returned to the rectilinear posture by the action of the restoring coil spring 27. Due to the restoring force at this time, a force is generated in which the front wheel 12 with the rocking axle 24 tilted via the forward tilting shaft 23 pushes the ground obliquely rearward and downward. As a reaction of this force, a force that pushes the front wheel 12 with the swing axle 24 obliquely forward and upward is applied to the propulsion steering unit 13 from the ground, thereby generating a force that propels the kick skater forward.

[Handle shaft folding device]
As shown in FIGS. 1 to 3, the fixed shaft portion 16 </ b> A includes a base end shaft portion 32 erected on the front wheel support portion 21, and a support shaft 33 orthogonal to the handle shaft center O on the base end shaft portion 32. And a fixed shaft cylinder portion 36 shown in FIG. 5 connected to the upper end portion of the tiltable shaft portion 34 via a connecting tool 35. The handle shaft folding device 31 includes a proximal end shaft portion 32 and a retractable shaft portion 34, an operation sleeve 37 slidably fitted from the retractable shaft portion 34 to the proximal end shaft portion 32, and the retractable shaft portion 34. A sleeve biasing spring (biasing member) 43 that is internally provided and biases the operating sleeve 37 downward, and an upright that automatically locks when the operating sleeve 37 is lowered to the lower limit to prevent the operating sleeve 37 from being lifted. A lock mechanism 38 and a bending lock mechanism 39 that locks the tiltable shaft portion 34 in a bending posture when the operation sleeve 37 is pulled up and bent toward the tiltable shaft portion 34 side are provided.

  That is, a pair of left and right receiving brackets 34a project from the lower end portion of the tiltable shaft portion 34, and a support bracket 32a fitted between the receiving brackets 34a projects from the upper end portion of the base end shaft portion 32 and meshes with each other. The support shaft 33 is fitted into each shaft hole of the support bracket 32a and the receiving bracket 34a thus formed, and is connected so as to be bent. Moreover, the upper side front part of the left and right support brackets 32a is formed on a locking surface part 32b that prevents the tiltable shaft part 34 from being tilted forward, and further, when the upper side part of the support bracket 32a is bent, the operation sleeve 37 is prevented from descending. A curved guide receiving portion 32c is formed.

  An accommodation hole 41 is formed on the handle shaft center O from the upper end surface of the tiltable shaft portion 34 to the vicinity of the upper portion of the receiving bracket 34a, and the outer circumferential surfaces and the accommodation holes on both the front and rear sides perpendicular to the support shaft 33 at the tiltable shaft portion 34. Left and right slide holes 42 are penetrated between 41 and 41 and formed along the handle shaft center O. A sleeve biasing spring (biasing member) 43 is accommodated in the accommodation hole 41, and a connecting pin (coupling member) 44 that is biased downward by the sleeve biasing spring 43 in the left and right slide holes 42. Is slidably arranged. Both ends of the connecting pin 44 are fitted and fixed in pin holes 37 a formed in the upper part of the operation sleeve 37. A bolt member 45 that presses the sleeve urging spring 43 to prevent it from coming off is mounted in a screw hole 41 a formed at the upper end of the accommodation hole 41. With the above configuration, the operation sleeve 37 can be urged downward by the sleeve urging spring 43 built in the tiltable shaft portion 34.

  In addition, a pair of left and right guide rails 46U and 46D projecting in a rectangular cross section on the outer peripheral surfaces of both ends of the support shaft 33 are provided on the retractable shaft portion 34 and the base end shaft portion 32, and the handle shaft is extended over the sliding range of the operation sleeve 37. Projecting in parallel with the center O. On the other hand, a pair of left and right guide grooves 47 in which a pair of left and right guide rails 46U and 46D are slidably fitted is formed on the inner peripheral surface of the operation sleeve 37. The guide rail 46 may be formed on the inner peripheral surface of the operation sleeve 37, the guide groove 47 may be formed on the outer peripheral surface of the operation sleeve 37, and the guide rails 46U and 46D and the guide groove 47 may be Either one is acceptable.

  Therefore, the operating sleeve 37 is urged downward by the sleeve urging spring 43, and the handle shaft 16 is held linearly at the lower limit position including the connecting portion of the support shaft 33 and extending from the retractable shaft portion 34 to the proximal end shaft portion 32. be able to. At this time, the guide rails 46U and 46D of the retractable shaft portion 34 and the base end shaft portion 32 are respectively fitted in the guide grooves 47 of the operation sleeve 37, thereby effectively preventing the handle shaft 16 from rattling in the front-rear direction. Can be resolved. Then, by pulling up the operation sleeve 37 toward the tiltable shaft portion 34 against the sleeve biasing spring 43, the handle shaft 16 above the tiltable shaft portion 34 around the support shaft 33 is moved backward to the board body 11. Can be folded to a lying posture.

(Upright lock mechanism 1)
A first embodiment of an upright lock mechanism 38 that automatically locks when the operation sleeve 37 is lowered to the lower limit and prevents the operation sleeve 37 from floating will be described with reference to FIG.

  The upright lock mechanism 38 is formed with a slide hole 52 in a tangential direction of the sleeve hole 37 b at the lower front portion of the operation sleeve 37, and the back end 52 a of the slide hole 52 is closed. A lock shaft 51 is slidably fitted in the slide hole 52. The lock shaft 51 includes a main body 51a formed in a columnar shape on the back side and an operation rod 51b protruding from the main body 51a to the opening side. A locking coil spring 53 that urges the lock shaft 51 toward the opening side is interposed between the rear end portion 52 a of the slide hole 52 and the lock shaft 51, and the operation rod portion 51 b is disposed at the opening portion of the slide hole 52. A retaining portion 54 that is inserted and prevents the main body 51a from being detached is provided. On the other hand, a lock groove 55 is formed in a tangential direction at the front portion of the base end shaft portion 32 at a position that matches the slide hole 52 of the lowermost operation sleeve 37. The operating rod 51b protrudes from the slide hole 52 in a locked state in which the main body 51a is fitted in the lock groove 55 and abuts against the retaining member 54. Further, by pushing the operating rod portion 51b into the slide hole 52, the main body portion 51a can be detached from the lock groove 55, and the lock can be released.

  Therefore, when the handle shaft 16 in the lying posture is raised, the operation sleeve 37 is lowered from the retractable shaft portion 34 to the lower limit of the proximal end shaft portion 32 by the sleeve biasing spring 43, and on the axis of the slide hole 52. When it coincides with the lock groove 55, the lock shaft 51 is pushed to the opening side by the action of the lock coil spring 53, the main body 51a is fitted into the lock groove 55, and the operation sleeve 37 is automatically locked. When the handle shaft 16 is folded, the operation rod portion 51b is pushed into the slide hole 52, whereby the main body portion 51a is detached from the lock groove 55 and the lock is released. Further, it is only necessary to push up the operation sleeve 37 and the base end shaft portion 32 to the tiltable shaft portion 34 and bend the tiltable shaft portion 34 backward.

The upright locking mechanism 38 can be disposed at the upper front portion or the rear portion of the operation sleeve 37, and the lock groove 55 can be formed in the tiltable shaft portion 34.
Further, in the vicinity of the upper limit position of the operation sleeve 37, another lock groove can be formed on the upper side corresponding to the lock position of the bending lock mechanism 39. Accordingly, the operation sleeve 37 can be locked in a bent state by a bending lock mechanism 39 described later, and safety can be further improved. In this case, when the operation sleeve 37 is pulled up and down, it is necessary to keep the operation rod portion 51b pushed until it passes through the upper lock groove.

(Upright lock mechanism 2)
A second embodiment of the upright lock mechanism 60 that automatically locks when the operation sleeve 37 is lowered to the lower limit to prevent the operation sleeve 37 from floating will be described with reference to FIG.

  Mounting holes 61 are formed and opened in the base shaft portion 32, the front and rear surfaces, or the left and right side surfaces, and the mounting holes 61 are configured by a small-diameter pin hole portion 61a and a large-diameter accommodation hole portion 61b. The lock pin 62 slidably fitted in these mounting holes 61 has a lock shaft portion 62a that has a hemispherical tip and protrudes outward from the pin hole portion 61a, and the lock shaft portion 62a is connected to the pin hole portion 61a. And a stopper piece 62b for preventing it from coming off. A locking coil spring 63 that biases the lock pin 62 in the protruding direction is interposed between the back end surface of the accommodation hole 61b, the stopper piece 62b, and the set screw 63. On the other hand, a pin hole 65 into which the lock shaft portion 62a of the lock pin 62 is fitted is passed through the operation sleeve 37 pushed down to the lower limit. On the outer surface of the pin hole 65, a counterbore portion 65a that can be unlocked by pushing the lock shaft portion 62a from the outside of the operation sleeve 37 with a finger is formed.

  Therefore, when the handle shaft 16 in the lying posture is raised, the operation sleeve 37 is lowered from the retractable shaft portion 34 to the lower limit of the proximal end shaft portion 32 by the sleeve biasing spring 43, and a pin hole is formed in the lock shaft portion 62a. When 65 is matched, the lock pin 62 is pushed out by the action of the locking coil spring 64 and fitted into the pin hole 65, and the operation sleeve 37 is automatically locked, and the operation sleeve 37 is prevented from being lifted. Further, when the handle shaft 16 is folded, the lock is released by pulling up the operation sleeve 37 while pushing the lock shaft 62a from the counterbore 65a into the pin hole 61a with a finger, and the handle shaft 16 can be released from the base end shaft 32. By pushing up the tilting shaft portion 34, the tiltable shaft portion 34 can be bent backward.

Note that the upright lock mechanism 60 may be provided on the front surface or the back surface of the tiltable shaft portion 34 and the operation sleeve 37.
Also, a lock pin 62 and a pin hole 65 can be provided near the upper limit position of the operation sleeve 37 so that the operation sleeve 37 can be locked at a lock position of a bending lock mechanism 39 described later. Thereby, the operation sleeve 37 in the lock position of the bending lock mechanism 39 can be locked, and safety can be further improved. In this case, when the operation sleeve 37 is pulled up to the upper limit, it is necessary to raise and lower the operation sleeve 37 while pushing the lock shaft portion 62a from the counterbore portion 65a when passing through the upper pin hole.

[Bending lock mechanism]
The bending lock mechanism 39 will be described with reference to FIG.
This folding lock mechanism 39 is an operation sleeve 37 that is biased downward (base end side) by a sleeve biasing spring 43, and a locking engagement portion 71 formed at the lower end of the bending side (back side), The base end shaft portion 32 is formed on a bent side (back side) of the support bracket 32a, and is configured by a lock concave portion 72 with which the lock engagement portion 71 can be engaged.

  Therefore, when the operating sleeve 37 is pulled up to the upper limit position of the tiltable shaft portion 34 against the sleeve biasing spring 43 and the tiltable shaft portion 34 is tilted rearward, the lower end of the front portion of the operating sleeve 37 is attached to the support bracket 32a. The operation sleeve 37 is held at the upper limit position by being brought into contact with the locking surface portion 32b, and the lowering is restricted. When the retractable shaft portion 34 is further lowered to the lower limit, the locking engagement portion 71 of the operation sleeve 37 is opposed to the locking recess 72, and the operation sleeve 37 is pushed out by the sleeve biasing spring 43, thereby engaging the locking. The portion 71 is fitted into the locking recess 72. Thereby, the collapsible shaft part 34 is locked at the fall limit. When releasing the lock, the lock engagement portion 71 may be detached from the lock recess 72 by pulling out the operation sleeve 37 to the upper limit against the sleeve biasing spring 43.

  According to the first embodiment, since the sleeve urging spring 43 that urges the operation sleeve 37 toward the base end shaft portion 32 is housed in the accommodation hole 41 of the tiltable shaft portion 4, The clearance between the tiltable shaft portion 34 and the proximal end shaft portion 32 can be reduced and closely fitted, and rattling of the handle shaft 16 in an upright state can be reduced. In addition, since the guide rails 46U and 46D and the guide groove 47 are formed on both ends of the support shaft 33 on the fitting surfaces of the operation sleeve 37, the tiltable shaft portion 34 and the base end shaft portion 32, the strength around the support shaft 33 is increased. And the backlash in the direction orthogonal to the support shaft 33 can be further reduced.

  Furthermore, the handle shaft 16 can be locked in an upright state by the upright lock mechanism 60 simply by releasing the bending lock mechanism 39 and erecting the tiltable shaft portion 34, thereby improving operability. Furthermore, by simply releasing the upright lock mechanism 60 and causing the tiltable shaft portion 34 to fall down, the folding lock mechanism 39 can lock the tiltable shaft portion 34 in a tilted state, thereby improving operability. .

  In the bending lock mechanism 39, a locking engagement portion 71 is formed on the operation sleeve 37 that is biased toward the proximal end shaft portion 32 by the sleeve biasing spring 43, and the proximal end shaft portion 32 is locked in a lying posture. When the locking recess 72 into which the engaging portion 71 is fitted is formed and the retractable shaft portion 34 is bent down, the locking engagement portion 71 is moved to the proximal end shaft portion 32 by the action of the sleeve biasing spring 43. The retractable shaft portion 34 can be locked in a bending posture by being fitted into the locking recess 72. Therefore, it is possible to automatically lock the tiltable shaft part 34 by simply tilting it down to the limit, and it is possible to easily lock the lying posture.

  Further, according to the upright lock mechanism 38, the lock shaft 51 is fitted into the lock groove 55, and the operation sleeve 37 is automatically locked, so that the tiltable shaft portion 34 can be easily locked in the standing posture. it can.

  Further, according to the upright lock mechanism 60, when the sleeve biasing spring 43 is pushed down to the lower limit of the base shaft portion 32, the lock pin 62 is fitted into the pin hole 65, and the operation sleeve 37 is automatically locked. Is done. Thereby, the locking operation of the standing posture can be easily performed.

[Example 2]
In the first embodiment, the handle shaft folding device 31 of the handle shaft 16 provided upright on the propulsion steering unit 13 has been described. However, as shown in FIG. The same function and effect can be achieved even with the handle shaft folding mechanism 81 that includes the fixed rear wheel 84 that is fixed to the front wheel 83 and that folds the handle shaft 85 attached to the front wheel 83.

11 Board body 12 Front wheel 13 Propulsion steering section 14 Rear wheel 16 Handle shaft 16A Fixed shaft section 16B Telescopic shaft section 17 Handle 21 Front wheel support section 31 Handle shaft folding device 32 Base end shaft section 32a Support bracket 32b Locking surface section 32c Guide receiving section 33 Support shaft 34 Retractable shaft portion 34a Receiving bracket 34b Guide receiving portion 35 Connecting tool 36 Fixed shaft tube portion 37 Operation sleeve 37a Pin hole 37b Sleeve hole 38 Upright lock mechanism 39 Bending lock mechanism 41 Housing hole 42 Slide hole 43 Sleeve biasing Spring 44 Connecting pin 45 Bolt member 46U, 46D Guide rail 47 Guide groove 51 Lock shaft 51a Body 51b Operation rod 52 Slide hole 52a Back end 53 Coil spring 54 Locking member 55 Lock groove 60 Upright lock mechanism 61 Hole 62 Lock pin 63 Set screw 64 Coil spring for locking 65 Pin hole 65a Counterbore portion 71 Locking engagement portion 72 Locking recess portion 81 Handle shaft folding device 82 Board body 83 Front wheel 84 Rear wheel 85 Handle shaft

However, in patent document 1, the operation | movement which folds a handle shaft with a handle support implement | achieves a handle shaft, after releasing a lock lever first, and also tightens a lock lever. In the use operation for raising the handle shaft, first release the lock lever, then stand the handle shaft, and tighten the lock lever. As described above, the folding operation of the handle requires a two-step operation of releasing and tightening the lock lever, which is troublesome.
An object of the present invention is to solve the above-mentioned problems and to provide a handle shaft folding device for a skater that can improve the operability by allowing the handle shaft to fall and stand in a simple operation. .

The invention described in claim 1
A handle shaft folding device for a skater for folding a handle shaft for operating a running roller provided on a board body,
A base shaft portion of the handle shaft, a tiltable shaft portion that is foldably connected to the base end shaft portion via a support shaft orthogonal to the handle shaft center, and slides on the tilt shaft portion and the base end shaft portion. An operation sleeve that is freely fitted externally,
The retractable shaft is internally provided with a biasing member that biases the operating sleeve downward,
When the tiltable shaft portion is bent , the operation sleeve is slid to the proximal shaft portion side by the biasing member, and a folding lock mechanism is provided to lock the tiltable shaft portion in a bending posture.
The urging member lowers the operation sleeve from the tiltable shaft portion to the base end shaft portion when the tiltable shaft portion is erected, and fixes the handle shaft in an upright state. The operation sleeve is slid to the base end shaft portion side when the bending lock mechanism is bent, and the bending lock mechanism is operated .
The invention according to claim 2
A handle shaft folding device for a skater for folding a handle shaft for operating a running roller provided on a board body,
A base shaft portion of the handle shaft, a tiltable shaft portion that is foldably connected to the base end shaft portion via a support shaft orthogonal to the handle shaft center, and slides on the tilt shaft portion and the base end shaft portion. An operation sleeve that is freely fitted externally,
The retractable shaft is internally provided with a biasing member that biases the operating sleeve downward,
When the operation shaft is lowered by the urging member to the lowering limit extending from the retractable shaft side to the base end shaft portion when the tiltable shaft portion is raised, the operation sleeve is automatically locked and the operation sleeve is locked. Upright lock mechanism to prevent the lifting of
When the tiltable shaft portion is bent, when the operating sleeve is slid to the proximal end shaft portion side by the biasing member, a folding lock mechanism is provided for locking the tiltable shaft portion in a bending posture.

The invention according to claim 3 is the configuration according to claim 1 or 2 ,
The bending lock mechanism includes a locking engagement portion formed on the operation sleeve, a locking recess formed on the proximal shaft portion or the tiltable shaft portion and engageable with the locking engagement portion, and the locking A locking coil spring that biases the engaging portion toward the locking recess .

The invention according to claim 4 is the configuration according to claim 2 or 3 ,
The upright lock mechanism
A slide hole formed in the operation sleeve along the tangential direction of the sleeve hole, a lock shaft slidably accommodated in the slide hole, a retractable shaft portion and a base corresponding to the lock shaft at the lower limit of the operation sleeve A lock groove continuous with the slide hole on one of the end shaft portions, a coil spring for locking that urges the lock shaft toward the lock groove with the slide receiving hole, and an operating rod for retracting the lock shaft from the lock groove Part.

The invention according to claim 5 is the configuration according to claim 2 or 3 ,
The upright lock mechanism
A lock pin that protrudes from the outer peripheral surface and is urged in a protruding direction by a locking coil spring in a mounting hole provided in one of the tiltable shaft portion and the base end shaft portion, and the lock pin at the lower limit of the operation sleeve. A pin hole formed through the operation sleeve is provided at a corresponding position, and a counterbore portion is formed on the outer peripheral side of the lock hole so that the lock pin can be manually retracted to the mounting hole side.

The invention according to claim 6 is the configuration according to any one of claims 1 to 5 ,
In the retractable shaft portion, a housing hole for housing the biasing member is formed along the handle shaft center, and a slide hole communicating with the housing hole and the outer peripheral surface of the tiltable shaft portion is formed,
A connecting member for connecting the biasing member and the operation sleeve is slidably fitted into the slide hole.
The invention according to claim 7 is the structure according to any one of claims 1 to 6,
Guide rails parallel to the handle shaft center are continuously projected on the outer peripheral surfaces of the base end shaft portion and the tiltable shaft portion, and a guide groove is formed on the inner peripheral surface of the operation sleeve so that the guide rail is fitted outside. It is a thing.

According to the first aspect of the present invention, since the urging member that urges the operation sleeve toward the base end shaft portion is provided in the retractable shaft portion, the clearance between the operation sleeve and the tiltable shaft portion and the base end shaft portion is provided. Can be closely fitted to each other, and rattling of the handle shaft in an upright state can be reduced. Further, the handle shaft can be fixed in an upright state by causing the operation sleeve to be fitted onto the base end shaft portion by the urging member only by raising the tiltable shaft portion, and the operability can be improved. Furthermore, by simply pulling up the operating sleeve to the tiltable shaft portion and causing the tiltable shaft portion to fall down, the tiltable shaft portion can be locked in a bent posture by the folding lock mechanism, and the operability can be improved.
According to the second aspect of the present invention, since the urging member that urges the operation sleeve toward the proximal end shaft portion is provided in the retractable shaft portion, the operation sleeve, the retractable shaft portion, and the proximal end shaft portion The clearance between the handle shaft and the handle shaft can be tightly fitted to each other, and rattling of the handle shaft in an upright state can be reduced . Moreover, the handle shaft can be locked in an upright state by the upright lock mechanism simply by releasing the bending lock mechanism and raising the tiltable shaft portion, thereby improving operability. Furthermore, by simply releasing the upright locking mechanism and causing the tiltable shaft portion to fall down, the folding lock mechanism can lock the tiltable shaft portion in the lying down state, and operability can be improved.

According to the third aspect of the present invention , the locking engagement portion is formed on the operation sleeve biased toward the proximal shaft portion by the biasing member, and the locking engagement is performed at the lower limit where the retractable shaft portion is bent. By fitting the mating part into the locking recess of the base end shaft part, it is possible to lock the tilting shaft part simply by lying down, and the locking operation of the lying posture can be easily performed.

  According to the fourth aspect of the present invention, when the upright lock mechanism is pushed down to the lower limit of the base shaft portion by the urging member, the lock shaft is fitted into the lock groove, and the operation sleeve is automatically locked. The standing posture can be easily locked.

According to the fifth aspect of the present invention, when the urging member is pushed down to the lower limit of the proximal end shaft portion by the upright lock mechanism, the lock pin is fitted into the pin hole and the operation sleeve is automatically locked. The standing posture can be easily locked.
According to the seventh aspect of the present invention, since the guide rail and the guide groove are formed on the fitting surfaces of the operation sleeve, the tiltable shaft portion, and the base shaft portion, the bending strength can be improved and the backlash can be reduced. .

Claims (5)

A handle shaft folding device for a skater for folding a handle shaft for operating a running roller provided on a board body,
A base shaft portion of the handle shaft, a tiltable shaft portion that is foldably connected to the base end shaft portion via a support shaft orthogonal to the handle shaft center, and slides on the tilt shaft portion and the base end shaft portion. An operation sleeve that is freely fitted externally,
The retractable shaft is internally provided with a biasing member that biases the operating sleeve downward,
A guide rail parallel to the handle shaft center is provided on one of the outer peripheral surface of at least one base end shaft portion and the tiltable shaft portion on both ends of the support shaft and the inner peripheral surface of the operation sleeve, and the other Forming a guide groove fitted to the guide rail,
An upright lock mechanism that automatically locks and prevents the operation sleeve from being lifted when the operation sleeve is lowered to the lower limit that fits the retractable shaft portion and the base end shaft portion;
The handle shaft of the skater is provided with a folding lock mechanism that locks the tiltable shaft part in a bent position when the operation sleeve is pulled up to the side of the tiltable shaft part and the tiltable shaft part is bent around the support shaft. Folding device. The bending lock mechanism includes a locking engagement portion formed at a lower end portion of the operation sleeve, and a locking recess portion formed at a proximal end shaft portion and engageable with the locking engagement portion,
2. The handle shaft folding device for a skater according to claim 1, wherein the locking engaging portion of the operating sleeve is fitted into the locking concave portion by the biasing force of the biasing member. The upright lock mechanism
A slide hole formed in the operation sleeve along the tangential direction of the sleeve hole, a lock shaft slidably accommodated in the slide hole, a retractable shaft portion and a base corresponding to the lock shaft at the lower limit of the operation sleeve A lock groove continuous with the slide hole on one end shaft part, a coil spring for locking that urges the lock shaft toward the lock groove by the slide hole, and an operating rod part for retracting the lock shaft from the lock groove The handle shaft folding device for a skater according to claim 1 or 2, characterized by comprising: The upright lock mechanism
A lock pin that protrudes from the outer peripheral surface and is urged in a protruding direction by a locking coil spring in a mounting hole provided in one of the tiltable shaft portion and the base end shaft portion, and the lock pin at the lower limit of the operation sleeve. A pin hole formed through the operation sleeve is formed at a corresponding position, and a counterbore portion is formed on the outer peripheral side of the lock hole so that the lock pin can be manually retracted to the mounting hole side. The handle shaft folding apparatus of the skater of Claim 1 or 2. In the retractable shaft portion, a housing hole for housing the biasing member is formed along the handle shaft center, and a slide hole communicating with the housing hole and the outer peripheral surface of the tiltable shaft portion is formed,
5. The skater handle shaft folding device according to claim 1, wherein a connecting member that connects the urging member and the operation sleeve is slidably fitted in the slide hole.

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