JP4810301B2 - Height adjustment mechanism and children's chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the height of a guard body by sliding the guard body in the vertical direction in relation to a seat body, and to fix the guard body in a stable state by preventing play of the guard body. <P>SOLUTION: This child seat 10 is provided with the seat body 12 and the guard body 18 constituted of a shoulder guard part 14 and a head guard part 16 in the upper part. The seat 10 is provided with a height adjusting device 30 for sliding the guard body 18 in the vertical direction along a rail part 12A of the seat body 12 to fix the guard body 18 at a prescribed position. The height adjusting device 30 is provided with an adjusting knob 36 on a back face side of the seat body 12 and a pressing member 34 on a front face side of the guard body 18. The pressing member 34 is provided with rigid projecting part 34B and elastic projecting part 34C engaged to an engagement recessed part 32 of the guard body 18. By a rotating operation of the adjusting knob 36, a distance between the adjusting knob 36 and the pressing member 34 is widened and the engagement of the engagement recessed part 32 and the rigid projecting part 34B is released, to slide the guard body 18. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention is used in a motorcycle and the like, and includes a height adjusting mechanism that adjusts the height of a moving member that is slidable in a vertical direction with respect to a fixing member such as a chair body, and a child equipped with the height adjusting mechanism. It is about a chair.

  2. Description of the Related Art Conventionally, there has been proposed a two-wheeled vehicle including a child chair on which a child can be seated in front of or behind a saddle.

  In this children's chair, a headrest that protects the child's head is provided at the top of the backrest, and this headrest can be adjusted in height according to the child's growth and the physique of different heights It has become. As this height adjusting device, a device has been proposed in which a headrest is fastened to a vertical guide member with screws and nuts via clamp members at two locations on the left and right sides (see, for example, Patent Document 1). ).

  However, in the above conventional device, when adjusting the height of the headrest, the screws and nuts at the left and right are separately rotated to release the fastening, and the headrest height is held at the desired height with one hand. Since one screw is tightened with the other hand and then the other screw is tightened, the adjustment operation takes time. Furthermore, there is a problem that the headrest is likely to be rattled by the sliding clearance of the guide portion, and the headrest is often locked in an inclined state.

In addition, a height adjustment device that fixes the stem portion of the headrest to a desired height by tightening the stem portion of the headrest with a single adjustment handle is also adopted for a chair or the like. Is composed of a screw shaft, and this screw shaft is moved in a screw hole provided in the guide groove, and the tip of the screw shaft is pressed against the stem portion of the headrest and stopped by frictional force, so the headrest is stopped at one point. However, there is a problem that locking of the headrest becomes unstable and rattling is likely to occur.
Utility Model Registration No. 3058842

  This invention is made in view of the said problem, and provides the height adjustment mechanism which can fix the height adjustment of moving members, such as a headrest, in a stable state by one touch, and a child chair. Objective.

In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a fixed member main body and a moving member provided to be slidable in the vertical direction with respect to the fixed member main body. A height adjustment mechanism that adjusts a rail portion provided in the fixing member main body and formed in a sliding direction, a sliding portion provided in the moving member and sliding along the rail portion, A plurality of engaging portions formed in the vertical direction on the opposite side of the fixed member main body of the moving member, and an engaged portion that is provided facing the moving member and is engaged with the engaging portion are formed. A pressing member, and an adjustment knob that is provided on the opposite side of the moving member of the fixed member main body and has a rotation shaft connected to the pressing member, and the rotation shaft by rotating the adjustment knob. When rotating in a fixed direction, The distance between the adjustment knob and the pressing member is reduced, the engaged portion is engaged with the engaging portion, and the fixed member main body and the moving member are interposed between the adjustment knob and the pressing member. And when the rotation shaft is rotated in the opening direction, the distance between the adjustment knob and the pressing member is widened, the engagement between the engagement portion and the engaged portion is released, The movable member is slidable with respect to the fixed member main body, the engaging portion is a concave portion, the engaged portion is a convex portion, and the convex portion is an elastic convex portion and a rigid convex portion. When the rotation shaft is rotated in the opening direction, the distance between the adjustment knob and the pressing member is widened, the engagement between the concave portion and the rigid convex portion is completely disengaged, and the elastic convex portion is It is characterized by engaging with the recess .

  According to the first aspect of the present invention, the sliding member provided on the moving member slides along the rail portion of the fixed member main body, so that the moving member slides in the vertical direction with respect to the fixed member main body. The moving member is formed with a plurality of engaging portions in the vertical direction on the side opposite to the fixed member main body, and an engaged portion of a pressing member provided to face the moving member can be engaged. Yes. An adjustment knob is provided on the opposite side of the fixed member main body to the moving member, and the adjustment knob includes a rotating shaft connected to the pressing member. When the rotating shaft is rotated in the fixing direction by rotating the adjusting knob, the distance between the adjusting knob and the pressing member is shortened, the engaged portion is engaged with the engaging portion, and the adjusting knob and the pushing member are pressed. The movable member is fixed by sandwiching the stationary member main body and the movable member between the abutting members. For this reason, by engaging the engaged portion with an arbitrary engaging portion, the moving member is fixed to the fixed member main body at an arbitrary position, and the height of the moving member relative to the fixed member main body can be adjusted. Become. In addition, when the rotation axis is rotated in the opening direction by the rotation operation of the adjustment knob, the distance between the adjustment knob and the pressing member is widened, the engagement between the engaging portion and the engaged portion is released, and the fixing member main body is disengaged. Thus, the moving member can slide. For this reason, the height of the moving member can be adjusted by a simple operation, and the moving member can be stably fixed by sandwiching the moving member and the fixing member main body between the adjustment knob and the pressing member. It is possible to prevent the movement member from rattling and the movement member from becoming unstable.

Further, the engaging portion is a concave portion, and the engaged portion is a convex portion. That is, a plurality of concave portions are formed in the vertical direction of the moving member, the moving member and the fixing member main body are sandwiched between the adjustment knob and the pressing member, and the convex portion of the pressing member is engaged with the concave portion. Thus, the moving member is fixed. For this reason, it becomes possible to adjust the height of the moving member with a simple configuration.

Further, the convex portion includes an elastic convex portion and a rigid convex portion, and when the rotation shaft is rotated in the opening direction, the distance between the adjustment knob and the pressing member is widened, and the concave portion and the rigid convex portion are engaged. Completely off. In this state, the elastic convex portion is engaged with the concave portion, and when the moving member is slid in the vertical direction, the elastic convex portion is elastically deformed and detached from the concave portion. Even when the rotating shaft is rotated in the opening direction, the elastic convex portion is engaged with the concave portion, and therefore, the moving member is suppressed from sliding off by its own weight.

Invention according to claim 2, in height adjustment mechanism of claim 1, wherein the adjustment knob, the rotary shaft is inserted into the opening of the pressing member, the push the distal end of the rotary shaft A retaining member that contacts the front surface of the abutting member, and the retaining member moves to the front surface of the abutting member when the rotation shaft is rotated in a fixed direction so that the distance between the abutting member and the adjustment knob And the locking member that holds the moving member and the fixed member main body, and the retaining member moves when the rotating shaft is rotated in the opening direction, and the distance between the pressing member and the adjustment knob is increased. And an unlocking portion that allows the moving member to slide relative to the fixed member main body.

According to the second aspect of the present invention, the rotating shaft of the adjustment knob is inserted through the opening of the pressing member, and the retaining member provided at the tip of the rotating shaft is in contact with the front surface of the pressing member. The front surface of the pressing member is provided with a lock portion that moves the retaining member when the rotation shaft is rotated in the fixing direction. When the retaining member moves to the locking portion, the distance between the pressing member and the adjustment knob is increased. The moving member is fixed by sandwiching the moving member and the fixed member main body. The front surface of the pressing member is provided with a lock releasing portion that moves the retaining member when the rotating shaft is rotated in the opening direction. When the retaining member moves to the unlocking portion, the pressing member and the adjustment knob are moved. And the moving member can slide with respect to the fixed member main body. For this reason, by rotating the adjustment knob and moving the retaining member, the movable member can be fixed or slid by a simple operation, and the operability is good.

A third aspect of the present invention is the height adjusting mechanism according to the second aspect , wherein the thickness is formed around the opening of the pressing member, and the thickness of the pressing member is increased or decreased. The meat part is the lock part, and the thin part is the lock release part.

In the invention according to claim 3 , since the thick part formed by increasing or decreasing the thickness around the opening of the pressing member is the lock part and the thin part is the unlocking part, the retaining member is thick. By moving to the meat portion, the distance between the pressing member and the adjustment knob is reduced, and by moving the retaining member to the thin portion, the distance between the pressing member and the adjustment knob is increased. For this reason, the distance between the pressing member and the adjustment knob can be changed with a simple configuration.

According to a fourth aspect of the present invention, in the height adjusting mechanism according to the third aspect , the thick portion and the thin portion are connected by an inclined surface.

In the invention according to claim 4 , since the thick part and the thin part are connected by the slope, the movement of the retaining member becomes smooth.

The invention according to claim 5 is characterized in that, in the height adjustment mechanism according to claim 3 or claim 4 , a stopper is provided between the thick part and the thin part.

In the invention according to claim 5 , since the stopper is protruded between the thick part and the thin part, both ends in the rotation range of the adjustment knob are limited to the lock part and the unlock part. The knob can be operated reliably.

The invention described in claim 6 is the height adjustment mechanism according to any one of claims 1 to 5, wherein the recess is substantially V-shaped surface, the inclined surface of the upper side of the V-shaped surface and The angle with the straight line in the direction perpendicular to the surface connecting the valleys of the substantially V-shaped surface is perpendicular to the surface connecting the inclined surface on the lower side of the V-shaped surface and the valleys of the substantially V-shaped surface. It is characterized by being formed smaller than the angle with a straight line.

In the invention according to claim 6 , the angle between the upper inclined surface of the V-shaped surface, that is, the inclined surface in the direction in which the moving member is lowered and the straight line in the direction perpendicular to the surface connecting the valley portions of the substantially V-shaped surface. Is formed small, it is difficult for the convex portion engaged with the concave portion to come off when the moving member is lowered. For this reason, it is suppressed that a moving member slips down with dead weight. Further, the angle between the inclined surface on the lower side of the V-shaped surface, that is, the inclined surface in the direction in which the moving member is raised and the straight line in the direction orthogonal to the surface connecting the valley portions of the substantially V-shaped surface is formed large. When the moving member is raised, the convex portion engaged with the concave portion is easily removed.

A child chair according to a seventh aspect of the present invention includes the height adjustment mechanism according to any one of the first to sixth aspects, wherein the fixing member body is fixedly supported by the two-wheeled vehicle, Is a chair body that can be seated, and the moving member is a head guard portion that protects the head portion or a shoulder guard portion that protects the shoulder portion.

In the invention according to claim 7 , since the moving member is a head guard part that protects the head part or a shoulder guard part that protects the shoulder part, according to the growth and height of the child, It is possible to adjust the height of the head guard portion or the shoulder guard portion. Thereby, a shoulder part and a head can be protected according to a child's physique, and the safety at the time of driving | running | working or falling can be ensured.

  According to the present invention, the height of the moving member can be adjusted by sliding the moving member up and down with respect to the fixed member body by a simple operation, and the moving member is prevented from rattling and the moving member is fixed in a stable state. It can be fixed to the member body.

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

  FIG. 1 shows a child chair 10 having a height adjusting device 30 according to an embodiment of the present invention. The child chair 10 includes a chair main body 12 as a fixing member main body, and the chair main body 12 is fixed and supported on a loading platform 6 provided behind the saddle 4 of the two-wheeled vehicle 2 by a mounting bracket (not shown).

  As shown in FIGS. 2 and 3, the chair body 12 is formed to bend so as to surround the back and both sides of the waist and buttocks, so that a child can sit on the chair body 12. A guard body 18 as a moving member is disposed in an upper part on the front side of the chair body 12 so as to partially overlap the chair body 12. In the guard body 18, a shoulder guard portion 14 that protects the shoulder portion and a head guard portion 16 that protects the head portion above the shoulder guard portion 14 are integrally formed. In addition, a handlebar 20 is provided in front of the chair body 12 so as to guard the front side of the child, and the handlebar 20 can be opened and closed at one end as a fulcrum ( (See FIG. 6). In addition, two step portions 22 on which legs can be placed are provided on the lower side of the chair body 12.

  As shown in FIGS. 4 to 6, the child chair 10 is provided with a height adjusting device 30 that slides the guard body 18 in the vertical direction and fixes the guard body 18 at a predetermined position. As shown in FIG. 4, the height adjusting device 30 includes a concave rail portion 12 </ b> A formed in the vertical direction at the center portion of the chair body 12, and the rail portion 12 </ b> A is provided on the back side of the shoulder guard portion 14. 14A is provided with a convex sliding portion 14A. And the guard main body 18 can be slid to an up-down direction with respect to the chair main body 12 because 14 A of sliding parts move along the rail part 12A.

  As shown in FIG. 2, the height adjusting device 30 includes a plurality of engagement recesses 32 formed in the vertical direction on the side opposite to the chair body 12 of the sliding portion 14 </ b> A of the guard body 18, and the engagement recesses 32. A pressing member 34 is provided at an opposing position (a front side of the guard body 18). Further, an adjustment knob 36 having a rotation shaft 36A is provided on the back side of the chair body 12. The rotation shaft 36A is inserted through the opening 12D of the chair body 12, the elongated hole 14D of the guard body 18, and the opening 34A of the pressing member 34. Two protrusions projecting in the radial direction are formed at the tip of the rotation shaft 36A. The retaining member 38 having the portion 38A is screwed (see FIG. 9).

  As shown in FIG. 7, on the guard body 18 side of the pressing member 34, rigid convex portions 34 </ b> B are rigidly provided on the pressing member 34 on both sides of the opening 34 </ b> A through which the rotation shaft 36 </ b> A is inserted. Yes. Further, on both sides of the rigid convex portion 34B, there are provided elastic convex portions 34C provided at the front ends of the U-shaped support arms 33 so as to be elastically displaceable with respect to the pressing member 34. Since the support arm 33 is formed in a U-shape and is joined to the pressing member 34 at the end opposite to the elastic convex portion 34C, the U-shaped support arm 33 is elastically deformed by the elastic convex portion 34C. You can change its position. Further, as shown in FIG. 7C, the rigid convex portion 34B is formed so that the protruding amount is smaller than the elastic convex portion 34C. As shown in FIG. 8, the rigid convex portion 34 </ b> B and the elastic convex portion 34 </ b> C can be engaged with an engaging concave portion 32 formed in the guard body 18.

  As shown in FIG. 7D, on the front side of the pressing member 34 (on the side opposite to the guard body 18), two inclined surfaces 35 are formed around the opening 34A, and the two inclined surfaces 35 protrude. It is partitioned by a portion 34E. As shown in FIG. 9, the protruding portion 38 </ b> A of the retaining member 38 is rotatable while being in contact with the inclined surface 35. On one end side of the inclined surface 35, a lock portion 35 </ b> A made of a thickened portion with a thickened pressing member 34 is formed, and on the other end side of the inclined surface 35, the thickness of the pressing member 34 is reduced. The unlocking part 35B which consists of the thin part which was made is formed. Then, by the rotation operation of the adjustment knob 36, the protruding portion 38A of the retaining member 38 rotates between the lock portion 35A and the lock release portion 35B. The protrusion 34E is a stopper that stops the movement of the protrusion 38A. By providing the protruding portion 34E, both ends of the adjustment knob 36 in the rotation range are limited to the lock portion 35A and the lock release portion 35B, so that the adjustment knob 36 can be operated reliably.

  As shown in FIG. 8, the engaging recess 32 has a substantially V-shaped surface, and the inclined surfaces 32 </ b> A and 32 </ b> B in the vertical direction have different angles with respect to the surface connecting the valley portions of the substantially V-shaped surface. Here, as shown in FIG. 8B, the angle between the straight line in the direction perpendicular to the surface connecting the valleys of the substantially V-shaped surface of the guard body 18 and the inclined surface 32A on the upper side of the V-shaped surface is θ. (A) The angle between the straight line in the direction orthogonal to the surface connecting the valley portions of the substantially V-shaped surface of the guard body 18 and the inclined surface 32B on the lower side of the V-shaped surface is θ (B). At this time, the inclined surface 32A on the upper side of the V-shaped surface, that is, the inclined surface 32A in the direction for lowering the guard body 18, and the inclined surface 32B on the lower side of the V-shaped surface, that is, the inclined surface 32B in the direction for raising the guard body 18 are The angle θ (A) of the inclined surface 32A is formed to be smaller than the angle θ (B) of the inclined surface 32B.

  As shown in FIG. 4, the shoulder guard portion 14 includes a wing portion 14B that protrudes while curving forward along the back surface of the child, and the chair body covers the back side of the wing portion 14B. Both sides of 12 are extended. As shown in FIGS. 2 and 6, oval slide holes 12B are formed in the sliding direction of the guard body 18 at both ends of the chair body 12 facing the wings 14B (FIGS. 2 and 6). (Only the front side is shown). In the slide hole 12B, a guide pin 14C protruding from the wing portion 14B is locked so as to be slidable in the vertical direction.

  In addition, on both sides of the rail portion 12A of the chair body 12, oval slide holes 12C are formed in the sliding direction of the guard body 18 (only the front side is shown in FIGS. 2 and 6). In the slide hole 12C, a guide pin 14C provided in the sliding portion 14A is locked so as to be slidable in the vertical direction. As a result, the guard body 18 slides in the vertical direction while being guided by the guide pins 14C to the slide holes 12B and 12C at a total of four locations, two locations on the rail portion 12A near the center and two locations on both sides. As shown in FIGS. 5 and 6, the guard body 18 has the uppermost position where the guide pin 14C moves to the upper part of the slide holes 12B and 12C, and the uppermost position where the guide pin 14C moves to the lower part of the slide holes 12B and 12C. It can slide between the lower position.

  As shown in FIG. 10, a cushion 44 </ b> A that is attached to the center portion and a cushion 44 </ b> B that is attached to the wing portions 14 </ b> B on both sides are provided inside the shoulder guard portion 14. These cushions 44A and 44B are shock absorbing members in which an elastic body such as foaming polyurethane is loaded. The cushions 44A and 44B are detachably attached to the inner side surface of the shoulder guard portion 14 with Velcro (not shown). . Further, on the inner side of the head guard portion 16, a cushion 46 </ b> A attached to the central portion and a cushion 46 </ b> B attached to both sides are provided. These cushions 46 </ b> A and 46 </ b> B are detachably attached to the inner side surface of the head guard portion 16 with Velcro (not shown).

  Further, the inner width of the head guard portion 16 is formed to be smaller than the inner width of the shoulder guard portion 14, and has a shape that easily matches the width of the child's head and shoulder portions. This makes it difficult for the head in the head guard 16 to move and the shoulder in the shoulder guard 14 to move, so that the head and shoulder can be properly protected.

  As shown in FIG. 1, when the child is seated on the chair body 12, the top of the head almost fits in the head guard 16 and the upper part of the shoulder fits below the upper end of the shoulder guard 14. By adjusting the height of the guard body 18, the head and shoulders can be protected appropriately.

  Next, the operation of the height adjusting device 30 configured as described above will be described.

  As shown in FIG. 8, when the rotation shaft 36 </ b> A is rotated in the fixing direction by the rotation operation of the adjustment knob 36, the protrusion 38 </ b> A of the retaining member 38 is inclined to the inclined surface of the pressing member 34 as shown in FIG. 9A. 35 is slid to move to the lock part 35A which is a thick part. In this state, as shown in FIG. 11, the distance between the adjustment knob 36 and the pressing member 34 is reduced, and the rigid convex portion 34B and the elastic convex portion 34C are engaged with the engaging concave portion 32, and the adjustment knob 36 and The chair body 12 and the guard body 18 are sandwiched between the pressing member 34. Thereby, the guard body 18 is fixed to the chair body 12.

  On the other hand, when adjusting the height of the guard body 18, the rotation shaft 36 </ b> A is rotated in the opening direction by the rotation operation of the adjustment knob 36. Then, as shown in FIG. 9B, the protrusion 38A of the retaining member 38 slides on the inclined surface 35 of the pressing member 34 and moves to the lock releasing portion 35B which is a thin portion. At that time, the locking portion 35A, which is a thick portion, and the unlocking portion 35B, which is a thin portion, are connected by the inclined surface 35, so that the retaining member 38 moves smoothly.

  In this state, as shown in FIG. 12, the distance between the adjustment knob 36 and the pressing member 34 increases, the engagement between the rigid convex portion 34B and the engaging concave portion 32 is completely disengaged, and the elastic convex portion 34C is engaged. The mating recess 32 is engaged. That is, since the engagement between the elastic convex portion 34C and the engagement concave portion 32 is not released, it is possible to prevent the guard body 18 from sliding off due to its own weight.

  Further, by providing the protruding portion 34E between the lock portion 35A that is a thick portion and the lock release portion 35B that is a thin portion, both ends in the rotation range of the adjustment knob 36 are connected to the lock portion 35A and the lock release portion 35B. Since it is limited, the adjustment knob 36 can be operated reliably.

  When the guard body 18 is slid in the vertical direction along the rail portion 12A of the chair body 12, the engagement with the engagement recess 32 is released due to the elastic deformation of the elastic protrusion 34C, and is engaged with the next engagement recess 32. The guard body 18 slides up and down while repeating this. At this time, since the engaging recess 32 is formed with a small angle θ (A) of the inclined surface 32A in the direction in which the guard body 18 is lowered, the engaging recess 32 is engaged with the engaging recess 32 when the guard body 18 is lowered. The elastic convex portion 34C is difficult to come off. For this reason, it can prevent more reliably that the guard main body 18 slips down with dead weight. Further, since the engaging recess 32 is formed with a large angle θ (B) of the inclined surface 32B in the direction in which the guard body 18 is lifted, the engaging recess 32 is engaged with the engaging recess 32 when the guard body 18 is lifted. The elastic convex portion 34C is easy to come off. For this reason, the guard body 18 can be raised with a light force.

  As shown in FIGS. 5 and 6, when the guard body 18 is slid to a desired position and the rotation shaft 36A is rotated in the fixing direction by the rotation operation of the adjustment knob 36, the rigid convex portion 34B and the elastic convex portion 34C are engaged. While being engaged with the recess 32, the chair body 12 and the guard body 18 are sandwiched between the adjustment knob 36 and the pressing member 34, and the guard body 18 is fixed to the chair body 12. Thereby, the height of the guard body 18 can be adjusted by a simple operation.

  At that time, as shown in FIG. 6, the guard body 18 has a guide pin 14C locked to the slide holes 12B and 12C at a total of four locations, two locations on the rail portion 12A near the center and two locations on both sides. Slide in the state. For this reason, while being able to slide the guard main body 18 smoothly with respect to the chair main body 12, the rattle of the guard main body 18 can be suppressed. Furthermore, it is possible to prevent the guard body 18 from becoming unstable and the guard body 18 from being tilted and locked.

  In this way, by sliding the guard body 18 up and down with respect to the chair body 12, the shoulder guard 14 and the head guard 16 are adjusted to an appropriate height in accordance with the growth of the child and the physique of the child of different heights. Can be adjusted. Thereby, according to the physique of a child, a shoulder part and a head are protected appropriately, a child's upper body becomes difficult to move, and safety can be secured at the time of running or falling.

  In the above embodiment, the rigid projection 34B and the elastic projection 34C are formed on the pressing member 34, and the engagement recess 32 is formed on the shoulder guard portion 14. However, the present invention is not limited to this configuration. For example, an engaging recess may be formed in the pressing member 34 and a rigid convex portion and an elastic convex portion may be formed in the shoulder guard portion 14.

  In the above-described embodiment, the height adjusting device 30 is provided to slide the guard main body 18 integrally configured of the shoulder guard portion 14 and the head guard portion 16 with respect to the chair main body 12 in the vertical direction. The configuration is not limited. For example, the height adjusting device 30 of the present invention can be applied to a mechanism for sliding only the shoulder guard portion 14 with respect to the chair body 12 and a mechanism for sliding only the head guard portion 16 with respect to the chair body 12. Further, the moving member of the present invention is not limited to the shoulder guard portion 14 and the head guard portion 16, and the fixing member main body is not limited to the chair main body 12.

It is a side view which shows the rear part of the two-wheeled vehicle which attached the chair for children which is one Embodiment of this invention to the back of the saddle. It is the perspective view of the child chair which is one Embodiment of this invention, Comprising: It is the perspective view which decomposed | disassembled the height adjustment apparatus. It is a front view of the chair for children which is one embodiment of the present invention. It is sectional drawing in the HH line of the child chair shown in FIG. It is a front view which shows the state which slid the guard main body of the child chair which is one Embodiment of this invention to the up-down direction. It is a side view which shows the state which slid the guard main body of the child chair which is one Embodiment of this invention to the up-down direction. It is a block diagram which shows the pressing member of the height adjustment apparatus shown in FIG. 2, Comprising: (A) is a perspective view of a back side, (B) is a side view, (C) is sectional drawing, (D) is front. It is a perspective view of the side. It is sectional drawing in the GG line of the child chair shown in FIG. It is a perspective view which shows the state which attached the retaining member to the pressing member of the height adjustment apparatus shown in FIG. 2, Comprising: (A) is the state which rotated the projection part to the lock part, (B) is the projection part. It is a figure which shows the state rotated to the lock release part. It is a perspective view which shows the state which mounted | wore the shoulder guard part and head guard part of the chair for children with the cushion. It is a partially expanded sectional view which shows the state by which the rigid convex part and the elastic convex part were engaged with the engagement recessed part, and the guard main body was fixed to the chair main body when the adjustment knob was rotated in the fixing direction. When the adjustment knob is rotated in the opening direction, the rigid convex portion and the engaging concave portion are disengaged and the elastic convex portion presses the engaging concave portion, so that the guard body can slide with respect to the chair main body. It is a partially expanded sectional view shown.

Explanation of symbols

2 Motorcycle 4 Saddle 6 Loading platform 10 Child's chair 12 Chair body (fixing member body)
12A Rail part 12B Slide hole 12C Slide hole 12D Open hole 14 Shoulder guard part (moving member)
14A Sliding part 14B Wing part 14C Guide pin 14D Long hole 16 Head guard part (moving member)
18 Guard body (moving member)
30 Height adjustment device (height adjustment mechanism)
32 Engaging recess (recess)
32A inclined surface (V-shaped surface)
32B inclined surface (V-shaped surface)
34 Pressing member 34A Open hole 34B Rigid convex portion 34C Elastic convex portion 34E Protruding portion (stopper)
35 Inclined surface (slope)
35A Locking part 35B Unlocking part 36 Adjustment knob 36A Rotating shaft 38 Retaining member 38A Protrusion part

Claims (7)

A height adjustment mechanism that includes a fixed member main body and a moving member that is slidable in the vertical direction with respect to the fixed member main body, and adjusts the height of the moving member;
A rail portion provided in the fixing member main body and formed in a sliding direction;
A sliding portion provided on the moving member and sliding along the rail portion;
A plurality of engaging portions formed in the vertical direction on the opposite side of the moving member to the fixed member body;
A pressing member provided facing the moving member and having an engaged portion engaged with the engaging portion;
An adjustment knob provided on the opposite side of the moving member of the fixed member body and having a rotation shaft connected to the pressing member;
When the rotation shaft is rotated in the fixing direction by the rotation operation of the adjustment knob, the distance between the adjustment knob and the pressing member is reduced, the engaged portion is engaged with the engagement portion, and the The fixed member main body and the moving member are sandwiched between the adjustment knob and the pressing member, and when the rotation shaft is rotated in the opening direction, the distance between the adjustment knob and the pressing member increases. The engagement portion and the engaged portion are disengaged, and the movable member is slidable with respect to the fixed member main body .
The engaging part is a concave part, and the engaged part is a convex part,
Furthermore, the convex part comprises an elastic convex part and a rigid convex part,
When the rotation shaft is rotated in the opening direction, the distance between the adjustment knob and the pressing member is widened, the engagement between the concave portion and the rigid convex portion is completely disengaged, and the elastic convex portion is engaged with the concave portion. height adjustment mechanism, characterized in that it is. The adjustment knob includes a retaining member in which the rotating shaft is inserted into an opening of the pressing member, and a front end of the pressing member is brought into contact with a front end portion of the rotating shaft.
When the rotation shaft is rotated in the fixing direction on the front surface of the pressing member, the retaining member moves to reduce the distance between the pressing member and the adjustment knob, and the moving member and the fixing member main body are When the rotating shaft is rotated in the opening direction, the retaining member moves and the distance between the pressing member and the adjustment knob is widened, and the movable member is slid with respect to the fixed member main body. The height adjusting mechanism according to claim 1 , further comprising an unlocking portion that enables the height adjusting mechanism. A thick portion formed around the opening of the pressing member and provided by increasing or decreasing the thickness of the pressing member is the lock portion, and a thin portion is the unlocking portion. The height adjusting mechanism according to claim 2. The height adjusting mechanism according to claim 3 , wherein the thick portion and the thin portion are connected by a slope . The height adjusting mechanism according to claim 3 or 4, wherein a stopper is provided between the thick part and the thin part . The concave portion has a substantially V-shaped surface, and an angle between an inclined surface on the upper side of the V-shaped surface and a straight line in a direction orthogonal to a surface connecting valley portions of the substantially V-shaped surface is an inclined surface on the lower side of the V-shaped surface. from claim 1, characterized in that it is smaller than the angle between the surface and the direction of the straight line perpendicular to the connecting it faces a trough of the substantially V-shaped surface as claimed in any one of up to claim 5 Height adjustment mechanism. A height adjustment mechanism according to any one of claims 1 to 6, comprising:
The fixing member main body is a chair main body that is fixedly supported by the two-wheeled vehicle and that can be seated by a child.
The child chair, wherein the moving member is a head guard portion that protects a head portion or a shoulder guard portion that protects a shoulder portion.

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