JP7563733B2 - Child seat mounting device - Google Patents

Description

The present invention relates to a child seat mounting device for mounting a child seat on the handlebars of a bicycle.

A child seat that is attached to the handlebars of a bicycle is equipped with a mounting device. One such device is a bicycle auxiliary seat device disclosed in Japanese Patent Application Laid-Open No. 2003-233666.
This bicycle auxiliary seat device is provided with a pair of left and right hanging means that fit onto the handlebars of the handlebars from above, and a receiving means that fits into the handlebar stem from the rear.The receiving means has a mid plate forming a stem fitting opening into which the handlebar stem fits, and a blocking member that is pivoted to the mid plate and prevents the handlebar stem from moving away from the stem fitting opening.A hook receiving piece is provided on the mid plate and a hook portion is provided on the blocking member.The blocking member is configured so that by rotating it to the blocking position and then moving it laterally (longitudinal direction), the hook portion engages with the hook receiving piece to secure the blocking member in the blocking position.

Patent No. 4133682

The above-mentioned conventional technology allows the hook portion to be engaged and disengaged from the hook receiving piece by moving the blocking member in the longitudinal direction (lateral direction), making it easy to engage and disengage the hook portion from the handle stem. However, both longitudinal ends of the blocking member are exposed, and there is no member to prevent the hook portion from disengaging from the hook receiving piece. Therefore, if an unexpected external force is applied from the lateral direction (the direction opposite to the engagement direction), the hook portion may unintentionally disengage from the hook receiving piece.

SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a child seat mounting device that can solve the problems of the prior art.
The present invention aims to provide a child seat mounting device that can prevent the retainer from unintentionally coming off by providing a release member that disengages the retainer by moving in the same direction as the fitting direction when the retainer is fitted to the handle stem.

The specific means for solving the problem in the present invention is a child seat mounting device provided with a seat support part K supporting a seat part S, a pair of hanging devices T on the left and right sides that are fitted to the handlebar Ha, and a retainer U that fits into a handle stem Hb from the front and prevents it from coming off,
The seat support portion K is formed with a fitting portion Ka that covers the rear portion and the left and right side portions of the handle stem Hb, and a pair of left and right insertion openings 4 are formed on the left and right sides of the fitting portion Ka.
The holder U is provided with a holder body 5 that covers the handle stem Hb from the front side by inserting and engaging left and right body legs 5a into the insertion opening 4, and a release member 6 that is inserted and movably inserted into the left and right body legs 5a of the holder body 5 to release the engagement of the left and right body legs 5a with the insertion opening 4,
The holding body 5 has the left and right body legs 5a formed on both sides of the body intermediate portion 5b, and each body leg 5a is provided with an engagement piece 8 which releasably engages with an engaged portion 7 formed in the insertion opening 4 to prevent the body leg 5a from coming off.
The release member 6 is characterized in that left and right release legs 6a are formed on both sides of the release intermediate portion 6b, which are inserted into the left and right main body legs 5a, and each release leg 6a is formed with an engagement holding portion 6a1 that faces the engagement piece 8 and holds the engagement of the engagement piece 8, and a detachment allowing portion 6a2 that faces the engagement piece 8 by being pushed in and moved, allowing the engagement piece 8 to detach .

According to the present invention, it is possible to prevent the retainer fitted to the handle stem from being unintentionally detached.
That is, in the present invention, the seat support part K can be held relative to the handle stem Hb by inserting and engaging the left and right body legs 5a of the holding body 5 into the left and right insertion openings 4, and the engagement is released by pushing and moving the release member 6 relative to the holding body 5, so that the insertion direction of the body legs 5a and the release movement direction of the release member 6 are opposite to each other, preventing unintended detachment of the holder U. Also, the engagement piece 8 of the holding body 5 engages with the engaged part 7 in the insertion opening 4 to prevent the holding body 5 from coming off, and the engagement holding part 6a1 pushes and moves the engagement piece 8 to make the detachment allowing part 6a2 face the engagement piece 8, allowing the holding body 5 to be detached, and the push-in movement direction of the release member 6 and the release movement direction of the release member 6 are opposite to each other, preventing unintended detachment of the holder U.

FIG. 1 is a cross-sectional side view showing an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1. 4 is a cross-sectional view taken along line YY in FIG. 3. 4 is a cross-sectional view taken along line Z-Z in FIG. FIG. FIG. FIG. FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 3 and 9, a child seat CS mounted on a handlebar H of a bicycle comprises a seat portion S and a seat support portion K that supports the seat portion S. The seat support portion K is provided with a child seat mounting device 1 having a pair of left and right hanging devices T that fit onto the handlebar Ha, and a retainer U that fits onto the handlebar stem Hb from the front to prevent it from coming off.

The seat support part K has a child handle part 21 which a child grasps projecting upward and forward from the upper part, and a bifurcated lower part with step parts 22 on which the child places his/her feet on the left and right outer sides.
In addition, the front part of the seat part S is connected to the mid-rear part of the seat support part K via a hinge shaft 23, so that the position of the seat part S can be changed from the horizontal position shown in Figure 1 to a position in which the upper part covers the child handle part 21.

The upper part of the seat support part K can be arranged to face the handlebar Ha, and a pair of left and right mounting holes 12 are formed in this upper part, and the mounting holes 12 are formed in multiple vertical stages (three stages in Figures 1 and 2), and a pair of left and right hanging devices T are inserted into them.
Each of the left and right hanging devices T has an upper clamping member T1 whose rear portion is inserted into the mounting hole portion 12 and whose front portion rests on the handlebar Ha from above, and a lower clamping member T2 which clamps the handlebar Ha from below. The upper clamping member T1 and the lower clamping member T2 clamp the handlebar Ha and are fastened with screws, thereby attaching the hanging device T to the handlebar Ha in a hanging manner.

The hanging device T can be fixed to the mounting hole 12 by passing a fastener such as a bolt 13a through and screwing into the wall forming each mounting hole 12 and the rear insertion portion of the upper clamping member T1. The bolts 13a pass through multiple positions between the wall and the rear insertion portion of the upper clamping member T1 in the hanging device insertion direction, and the walls and fasteners form a fixing means 13 that attaches the hanging device T to the mounting hole 12 in multiple positions in the hanging device insertion direction.

Between the left and right mounting hole portions 12 of the seat support portion K is an insertion space E that faces the handle stem Hb, and in the middle of the seat support portion K (below the insertion space E) there is formed an engagement portion Ka that can abut against the handle stem Hb.
The fitting portion Ka has a U-shaped inner edge and is shaped to cover the rear and left and right side portions of the handle stem Hb, and a pair of left and right insertion openings 4 are formed on the left and right sides of the fitting portion Ka. The insertion opening 4 is a cavity with a front opening, into which a holder U that covers the handle stem Hb from the front is inserted in a detachable manner, and a valley-shaped engaged portion 7 is formed on the ceiling of the cavity.

1 to 9, the holder U is roughly U-shaped (gate-shaped) when viewed from above, and has a holder main body 5 inserted into the left and right insertion openings 4, a release member 6 inserted into the holder main body 5 and movable in the insertion direction, and a biasing member 10 that biases the release member 6 in the direction of removing it from the holder main body 5.
The holding body 5 has left and right body leg portions 5a which are inserted into the left and right insertion opening portions 4, and a body intermediate portion 5b which connects the left and right body leg portions 5a and can cover the handle stem Hb from the front, and the inside of the body intermediate portion 5b and the body legs 5a on both sides thereof are formed hollow, so that a release member 6 can be inserted into the hollow.

An engagement piece 8 is formed by cutting a slit 25, which is roughly U-shaped in plan view, into the top wall of each of the left and right body legs 5a. This engagement piece 8 has a mountain-shaped (triangular) protrusion formed on the upper surface of the rear end of a flat thin plate, and is formed in a shape that is elastically deformable and elastically restores its shape so that the mountain-shaped protrusion at the rear end moves up and down with the front end as the center.
The rear end angled projection of the engagement piece 8 protrudes above the upper surface of the top wall of the body leg 5a and engages with the engaged portion 7 in the triangular valley of the insertion opening 4 (as shown in FIG. 2). When the body leg 5a is removed from the insertion opening 4, the angled projection comes out of the triangular valley, so that the engagement piece 8 is pushed down.

The release member 6 has left and right release legs 6a which are inserted into the left and right main body legs 5a, and a release intermediate portion 6b which connects the left and right release legs 6a and is inserted into the main body intermediate portion 5b. Each release leg 6a has a detachment allowing portion 6a2 formed by a rectangular opening, and an engagement retaining portion 6a1 is formed on the tip side of the opening.
When the release member 6 is within the holding body 5 and a force is acting in the pushing direction by the biasing member 10, the engagement holding portion 6a1 of the release leg 6a faces the rear end of the engagement piece 8, preventing the engagement piece 8 from escaping (disengaging) from the engaged portion 7 and ensuring the engagement of the engagement piece 8.

When the release member 6 is moved in the pushing direction against the biasing member 10, the open detachment allowing portion 6a2 faces the rear end of the engaging piece 8, allowing the engaging piece 8 to escape (detach) from the engaged portion 7, and allowing the engaging piece 8 to detach. When the detachment allowing portion 6a2 allows the engaging piece 8 to detach from the engaged portion 7, a disengaged state is achieved, and the holding body 5 can be pulled out of the insertion opening 4.

The pushing movement of the release member 6 is performed by pinching the release intermediate portion 6b and the main body intermediate portion 5b with fingers, and this pushing direction is opposite to the release movement direction in which the release member 6 is pulled out of the holding main body 5.
Therefore, even if the handle stem Hb and the seat support part K move relative to each other and the handle stem Hb collides with the main body intermediate part 5b, the release member 6 will not move, and even if an external force is applied to the release member 6, it will not become a force that pulls out the holding main body 5.

The engaged portions 7 on the upper surface of the insertion opening 4 are formed at multiple locations in the insertion direction (three locations in FIG. 2), allowing the position at which the holding body 5 is inserted to be changed. Normally, the holding body 5 is inserted into the insertion opening 4 until it abuts against the handle stem Hb, and together with the inner surface of the fitting portion Ka, it clamps the handle stem Hb, minimizing "play" and "wobble" when attaching the seat support part K to the handle stem Hb.

The biasing member 10 that biases the release member 6 in the pushing direction is disposed between the main body intermediate portion 5b and the release intermediate portion 6b, and although a coil spring is shown as an example, it may be a leaf spring.
A shallow groove 11a is formed on the upper surface of the bottom wall at the tip side of the main body leg 5a, and a protrusion 11b that engages with the shallow groove 11a is formed on the lower surface midway in the longitudinal direction of the release leg 6a, and the protrusion 11b is movable within the shallow groove 11a, but further movement is prevented at the end of the shallow groove 11a.

This prevention of movement is achieved by restricting the pushing out of the release member 6 by the biasing member 10, and the shallow groove 11a and the protrusion 11b form a slip-out prevention means 11 between the main body leg 5a and the release leg 6a of the release member 6, which restricts the release leg 6a from slipping out from within the main body leg 5a.
When mounting and attaching the child seat CS to the bicycle handlebars H, the child seat mounting device 1 places the front parts of the upper clamping members T1 of the left and right hanging devices T on the handlebars Ha from above, aligns the insertion space E of the seat support part K against the handlebar stem Hb, and abuts the fitting part Ka against the handlebar stem Hb.

In this state, the lower clamping member T2 is placed against the handlebar Ha from below and clamps the handlebar Ha together with the upper clamping member T1, and is fixed by screws. The holder U is then inserted into the left and right insertion openings 4 from the front of the fitting portion Ka.
When inserting the holder U into the left and right insertion openings 4, the middle part of the holder U is pinched with the fingers and the release member 6 is pushed in against the biasing member 10 (moving it from the dotted line position to the two-dot chain line position in FIG. 8 ), so that the separation allowing portion 6a2 faces the engagement piece 8 and is in a state that allows the engagement piece 8 to move backward due to elastic deformation. In this state, the engagement piece 8 is in a retractable state, so there is no insertion obstruction, and the left and right body legs 5a can be inserted into the left and right insertion openings 4.

When the retainer U is inserted until the main body intermediate portion 5b abuts against the handlebar Ha, the engaging piece 8 engages with the engaged portion 7 due to its elastic restoring force, and when the grip on the release member 6 is stopped in this state (the pushing is released), the release member 6 is moved in the pushing direction by the biasing force of the biasing member 10, and the part facing the engaging piece 8 changes from the separation allowing portion 6a2 to the engagement retaining portion 6a1, preventing the engaging piece 8 from retracting and ensuring the engagement of the engaging piece 8.

In the above-mentioned embodiment, the child seat mounting device is provided with a pair of left and right hanging devices T that fit onto the handlebar Ha, and a retainer U that fits onto the handle stem Hb from the front, on the seat support part K that supports the seat part S. The seat support part K is formed with a fitting part Ka that covers the rear part and the left and right sides of the handle stem Hb, and a pair of left and right insertion openings 4 are formed on the left and right sides of this fitting part Ka. The retainer U is provided with a retainer body 5 that inserts and engages the left and right body legs 5a into the left and right insertion openings 4 to cover the handle stem Hb from the front, and a release member 6 that can be pushed into the left and right body legs 5a of the retainer body 5 and inserted movably to release the engagement of the left and right body legs 5a with the insertion openings 4.

With this configuration, the left and right body legs 5a of the holding body 5 are inserted into and engaged with the left and right insertion openings 4, thereby holding the seat support part K against the handle stem Hb, and the engagement is released by pushing and moving the release member 6 against the holding body 5, so that the insertion direction of the body legs 5a and the release movement direction of the release member 6 are opposite, preventing the holder U from unintentionally coming off.

In the embodiment, the retaining body 5 has the left and right body legs 5a formed on both sides of the body intermediate portion 5b, and each body leg 5a has an engagement piece 8 that releasably engages with the engaged portion 7 formed in the insertion opening 4 to prevent the body leg 5a from coming off, and the release member 6 has left and right release legs 6a that are inserted into the left and right body legs 5a on both sides of the release intermediate portion 6b, and each release leg 6a has an engagement holding portion 6a1 that faces the engagement piece 8 and holds the engagement of the engagement piece 8, and a detachment allowing portion 6a2 that faces the engagement piece 8 by being pushed in and moves to allow the engagement piece 8 to detach.

With this configuration, the engaging piece 8 of the holding body 5 engages with the engaged portion 7 inside the insertion opening 4 to prevent the holding body 5 from coming off, and the engaging holding portion 6a1 pushes in and moves the engaging piece 8, causing the detachment allowing portion 6a2 to face the engaging piece 8, allowing the holding body 5 to be detached. The direction in which the release member 6 is pushed in and the direction in which the release member 6 is released are reversed, preventing the holder U from unintentionally coming off.

Furthermore, in the above embodiment, a biasing member 10 that biases the release member 6 toward a position where the engagement holding portion 6a1 faces the engagement piece 8 is provided between the main body intermediate portion 5b and the release intermediate portion 6b.
With this configuration, the engagement between the engaging piece 8 and the engaged portion 7 can be ensured unless the releasing member 6 is intentionally moved in the releasing direction against the biasing member 10 .

Furthermore, in the embodiment, a slip-out prevention means 11 is provided between the main body leg 5a of the holding body 5 and the release leg 6a of the release member 6 to prevent the release leg 6a from slipping out from within the main body leg 5a.
This configuration makes it possible to prevent the release member 6 from being unintentionally removed from the holding body 5.
In the embodiment, a plurality of engaged portions 7 are formed in the insertion opening 4 of the fitting portion Ka in the insertion direction of the body leg portion 5a.

With this configuration, even if the handle stem Hb has a different diameter, the holding body 5 can be disposed closer to the handle stem Hb.
Furthermore, in this embodiment, the seat support portion K has multiple upper and lower mounting hole portions 12 into which the left and right hanging devices T are inserted and attached, and fixing means 13 are provided between each mounting hole portion 12 and the hanging device T for attaching the hanging devices at multiple positions in the insertion direction.

With this configuration, even if the handlebars Ha are of different heights, the seat support portion K and the seat portion S can be positioned at an optimal height.
The present invention is not limited to the above-described embodiment, and the shape, configuration, and combination of the members can be changed.
For example, the pair of left and right hanging devices T are separate, but may be integrated by connecting them with a connecting member.

1 Child seat attachment device 4 Insertion opening portion 5 Holding main body 5a Main body leg portion 5b Main body intermediate portion 6 Release member 6a Release leg portion 6a1 Engagement holding portion 6a2 Disengagement permitting portion 6b Release intermediate portion 7 Engaged portion 8 Engagement piece 10 Included Reinforcement member 11 Regulating means 12 Mounting hole 13 Fixing means 23 Hinge shaft 25 Slit E Insertion space Ha Handlebar Hb Handle stem K Seat support Ka Fitting part S Seat part T Hanging tool U Holder

Claims (5)

A child seat mounting device is provided on a seat support part (K) supporting a seat part (S), and is provided with a pair of left and right hanging devices (T) that are fitted to handlebars (Ha), and a retainer (U) that is fitted to a handle stem (Hb) from the front to prevent the seat from coming off,
The seat support portion (K) is formed with a fitting portion (Ka) that covers the rear portion and the left and right side portions of the handle stem (Hb), and a pair of left and right insertion opening portions (4) are formed on the left and right sides of the fitting portion (Ka),
The holder (U) is provided with a holder body (5) that covers the handle stem (Hb) from the front side by inserting and engaging the left and right body legs (5a) into the insertion opening (4), and a release member (6) that is inserted and movably inserted into the left and right body legs (5a) of the holder body (5) to release the engagement of the left and right body legs (5a) with the insertion opening (4),
The holding body (5) has the left and right body legs (5a) formed on both sides of the body middle part (5b), and each body leg part (5a) is provided with an engagement piece (8) which detachably engages with an engaged part (7) formed in the insertion opening part (4) to prevent the body leg part (5a) from coming off,
A child seat mounting device characterized in that the release member (6) has left and right release legs (6a) formed on both sides of the release intermediate portion (6b) to be inserted into the left and right main body legs (5a), and each release leg (6a) is formed with an engagement holding portion (6a1) that faces the engagement piece (8) and holds the engagement of the engagement piece (8), and a disengagement allowing portion (6a2) that faces the engagement piece (8) by being pushed in and moved to allow the engagement piece (8) to be disengaged . The child seat mounting device as described in claim 1, characterized in that a biasing member (10) is provided between the main body intermediate portion (5b) and the release intermediate portion (6b) to bias the release member (6) toward a position where the engagement retaining portion (6a1) faces the engagement piece (8) . A child seat mounting device as described in claim 1 or 2, characterized in that a slip-out prevention means (11) is provided between the main body leg portion (5a) of the retaining body (5) and the release leg portion (6a) of the release member (6) to prevent the release leg portion (6a) from slipping out from within the main body leg portion (5a) . A child seat mounting device as described in any one of claims 1 to 3, characterized in that a plurality of engaged portions (7) are formed within the insertion opening portion (4) of the fitting portion (Ka) in the insertion direction of the main body leg portion (5a) . The child seat mounting device according to any one of claims 1 to 4, characterized in that the seat support portion (K) is formed with multiple upper and lower mounting holes (12) into which left and right hanging devices (T) are inserted and attached, and fixing means (13) are provided between each mounting hole portion (12) and the hanging device (T) for mounting at multiple positions in the hanging device insertion direction .

Images