JPH1059188A - Slide type lock mechanism for folding seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe lock mechanism in which folding cannot be performed unless folding action is continuously performed for a second lock mechanism by adding the second lock mechanism to a lock mechanism which has conventionally been used in a folding baby car. SOLUTION: For folding the whole body of a frame of a folding baby car, a first lock mechanism similar to conventional ones is released by one hand, and a slide type lock mechanism 19 provided as a second lock mechanism is operated by the other hand to release lock. This slide type lock mechanism 19 slides a handle 127 against energization force of a spring 121 to slide a slide member 117 insideone arm rest member 21 for continuously maintaining a condition where a tip of the slide member 117 is not applied to an abutting part 123 of the other forward leg 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding type seating apparatus which is designed so that a frame constituting a seating apparatus such as a stroller, a wheelchair, an infant chair or an elderly car can be expanded and converged by a simple operation. Related to the lock mechanism.

[0002]

2. Description of the Related Art FIG. 7 shows a foldable stroller which is one of the conventional foldable seating devices.

[0003] In the figure, a front leg 81 and a rear leg 82 are connected to a hinge connection 84 supported at their upper ends by an armrest member 83.
A front wheel 85 is provided at a lower end of the front leg 81, and a rear wheel 86 is provided at a lower end of the rear leg 82.

A turning member 87 is rotatably connected to a substantially center of the rear leg 82 in a longitudinal direction by a hinge connection 88. The pivot member 87 is moved from the hinge connection 88 to the rear leg 82.
And a bent shape protruding above the rear portion of the rear leg 82, and a push rod 89 is provided on the protruding portion 87b.
Are rotatably connected by a hinge connection 90.

Since the push rod 89 is rotatably connected to the rear end of the armrest member 83 by a hinge connection 91, the push rod 89 rotates backward when the front leg 81 and the rear leg 82 are opened. Traffic regulations are enforced.

The front end of a connecting member 92 is rotatably connected to the middle of the front leg 81 by a hinge connection 93, and the rear end of the connecting member 92 is rotatably connected by the hinge connection 90 of the rotating member 87. The front legs 81 and the rear legs 82
Is restricted to a certain width.

Further, an opening / closing lock 94 that moves up and down along a push rod 89 is fitted over the projecting portion 87b of the rotating member 87, and the opening / closing lock 94 is formed with a stepped portion 94a formed at the lower end of the opening / closing lock 94. When the stepped portion 87a formed at the upper end of the member 87 engages with each other, the rotating member 87 is locked.

[0008]

The conventional foldable stroller is locked only by an open / close lock 94, and once the lock of the open / close lock 94 is unlocked, the foldable stroller is foldable. The transition to the state is completed, and in the unlikely event that there is a possibility that an unintended folding operation may be started.

[0009] In response to such fears, there has been a demand for a safe lock mechanism which does not perform folding unless the person handling the folding stroller keeps the intention of folding.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a lock mechanism that can be folded only when the user intends to fold and continues a predetermined operation. And

[0011]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of frame members are hinged at a plurality of locations, and a convergence posture and a deployment posture are obtained by rotation of the hinge connection. In the lock mechanism of the folding seating device, a slide lock mechanism is provided at at least one of the hinge connection portions, the slide lock mechanism includes two frame members hinged to each other with their ends facing each other, A handle provided outside one frame member and slidable in the axial direction of the one frame member, a slide member that slides in the axial direction inside the one frame member in conjunction with the handle, and a When the slide member slides and protrudes, the slide member abuts on the tip of the protruded slide member to prevent rotation. A contact portion, a slide locking mechanism of the folding seat device characterized in that it is constituted by a spring for urging the slide member in abutment direction.

Further, according to a second aspect of the present invention, there is further provided a folding seating device which takes a converging posture and an unfolding posture by rotating a hinge connection, comprising: an armrest member; and a front leg hinged at an upper end to the front of the armrest member. A rear leg having an upper end hinged to the center in the front-rear direction of the armrest member, a push rod having an upper center hinged to the rear of the armrest member, and a lower end having the upper end hinged to the lower end of the push rod. A frame having a pivot member hinged to the leg and pivoting; and a communication member substantially at the center of the pivot member at one end hinged at the other end and hinged at the other end to the front leg. A folding seating device in which a member rotates and is positioned below and a seating device takes a converging posture, and a rotating member rotates and is positioned above and a seating device takes an unfolding posture. Equipped with a first locking mechanism to prevent The slide of the folding seating device according to claim 1, wherein the second locking mechanism is provided at a hinged portion where the upper end of the front leg is hingedly connected to the front of the armrest member. It is a type lock mechanism.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS.

(Overall Schematic) The folding seating device according to the first embodiment is a folding stroller.

FIG. 1 is an overall perspective view showing a state in which the foldable stroller of this embodiment is developed. A baby basket 5 having a reclining backrest 1 and a sunshade cover 3 is detachably fixed, and a shopping basket 7 is provided at the lower rear side of the baby basket 5. In FIG.
Although the baby basket 5 faces forward, the direction of the baby basket 5 can be changed, and the baby basket 5 can face the mother who presses the push rod 9.

FIG. 2 shows the stroller in a folded state, that is, a converging posture. In addition to the first frame 11 which is a main body frame for folding the stroller, the baby basket is removably attached, and when folded, moves in the direction of the front legs 13 in conjunction with the folding operation of the first frame 11 to make the whole more compact. And a second frame 15 for carrying out.

The first frame 11, which is the main body frame, has a lock mechanism 17 (first lock mechanism) similar to that of a conventional foldable stroller, in order to prevent the first frame 11 from being unintentionally foldable. In addition to the above, a slide lock mechanism 19 as a second lock mechanism is separately provided as shown in FIGS.

(First Frame) Next, a first frame 11 which is a main body frame of the folding stroller of the first embodiment will be described with reference to FIGS.

The armrest member 21 of this embodiment is greatly inclined forward, and the front leg 1 in the unfolded state (FIGS. 1 and 2).
3 and form a continuous curve. The upper end of the front leg 13 is hinged to the front of the armrest member 21. Further, the upper end of the rear leg 25 is hinged (not shown) to the center of the armrest member 21 in the front-rear direction. At the rear of the armrest member 21, the center in the vertical direction of the push rod 9 is hinged. The upper end of the rotating member is hinged to the lower end of the push rod 9. The lower end of this rotating member is hingedly connected to the rear leg 25. One end of a communication member 35 is hinged to the longitudinal center of the front leg 13, and the other end of the communication member 35 is hinged to substantially the center of the rotating member.

In the folding operation, that is, the convergence operation, the pivoting member pivots around the hinge connection portion with respect to the rear leg 25, and is located below, and pushes down the lower end of the push rod 9 by turning it backward.

At the same time, the connecting member 35 hinged to the substantially center of the rotating member is pushed down so as to rotate backward. The front leg 13 pulled by the connecting member 35 having this rearward movement rotates around the hinge connection in front of the armrest member 21, approaches the rear leg 25, and attempts to line up in a substantially parallel state. Dragged by the movement of the front leg 13, it similarly approaches the rear leg 25 and is arranged in a substantially parallel state. As described above, the front leg 13 and the rotating member approach the rear leg 25 and are arranged in a substantially parallel state. Therefore, the communication member 35 hinged to the front leg 13 and the rotating member also Approaching,
Lined up in a substantially parallel state. In this way, the stroller is folded into a converging position.

In the unfolding operation, the turning member turns in the opposite direction and is located above. As a result, the deployment posture is obtained by a movement reverse to the above-described convergence operation.

Further, in the unfolded position, the portion from the hinge connection at the center of the push rod 9 in the vertical direction to the lower end is the armrest member 21.
The cover 21A provided on the armrest member 21 and having a downward opening is housed through the opening. Further, in the unfolded posture, the rotating member moves the rear leg 25.
Has a dimensional shape that conforms to the above. An upper portion of the pivot member is provided with a cover 21 provided on the armrest member 21.
A is stored. Therefore, compared to the conventional example (FIG. 7), the lower part of the push rod 9 and the upper part of the rear leg 25 have a cleaner shape. That is, the lower part of the push rod 9 and the rear leg 25
It is possible to put a hand from the side near the upper part of, and it is possible to easily put goods in and out of the shopping basket 7.

The connecting member 35 is extended further rearward from a portion hingedly connected to the rotating member, and the left and right portions of the extended portion continue in a substantially U-shape. Then, the shopping basket 7 made of cloth is attached to the U-shaped portion.

Further, by this extension, the rear end of the connecting member 35 comes into contact with the ground in the converging posture shown in FIG. By the contact member 35 being in contact with the ground in this way, the folding stroller of this embodiment can stably stand by the contact member 35 and the wheel 41 of the rear leg 25 (FIG. 2B). ).

(Second Frame) The front leg 13 and the rear leg 25 have a small mutual angle in the convergent posture, and have a large mutual angle in the deployed posture. These front legs 1
The second frame 15 is attached to the rear leg 3 and the rear leg 25. The second frame 15 is fixedly attached to the baby basket 5 and moves in the direction of the front leg 13 in conjunction with the folding operation of the first frame 11 at the time of folding, to make the whole more compact.

The second frame 15 comprises a first member 51 and a second member 53. After the first member 51 is hinged at one end to the rear leg 25 side and curves downward,
It has a form that has been lifted upward. One end of the second member 53 is hinged to the raised end of the first member 51.
After being bent backward and curved, the other end is hingedly connected to the connecting member 35. The other end of the second member 53 becomes a connecting portion 59 extending downward and also serving as a step.

By the action of the first frame 11 and the second frame 15, the second frame 1
5 moves in the direction of the front legs (FIG. 2). Then, the baby basket 5 is removably fixed and attached to the second frame 15.

(Sliding Lock Mechanism) The frame pipe 114 forming the armrest member 21 and the frame pipe 110 forming the front leg 13 are hinged together with their ends facing each other. In the hinge connection 23, the frame pipe 114 of the other armrest member 21 is inserted into a hollow portion 113 formed at one end of the base portion 111 fixed to the front leg side 13, and the hinge connection 23 is performed by a hinge pin 115. The hinge pin 115 is connected to the armrest member 21.
Hole 115 formed on the side surface of the frame pipe 114 of FIG.
Through the elongated hole 119 of the slide member 117 provided inside the frame pipe 114.

The slide member 117 is connected to the frame pipe 1
14 is slidably provided along the longitudinal direction, and is urged in the end direction, that is, in the left direction in the figure by a coiled spring 121 disposed rearward.

The tip of the slide member 117 is
11 into the cavity 113. This hollow portion 113
A contact portion 123 that is in close contact with the leading end of the protruding state of the slide member 117 to prevent rotation, communicates with the contact portion 123, and is rotatable without contact when the slide member 117 is retracted. It comprises an extension unit 125.

A handle 127 slidably provided along the axial direction of the frame pipe 114 is disposed outside the base portion 111. The sliding of the handle 127 is enabled by fitting a slide protrusion 129 having a T-shaped cross section provided on the base portion 111 side into a slide groove 131 having a T-shaped cross section provided on the handle 127 side. I have.

The handle 127 is provided with a cylindrical pressing projection 133, and the tip of the pressing projection 133 passes through a window 135 which is a long hole provided in the base 111.
The slide member 11 protrudes into the inner hollow portion 113,
7 is in contact with the tip.

When performing the folding operation, the handle 12
7 is slid rightward in the drawing, and the pressing protrusion 133 presses the tip of the slide member 117 to retreat rightward in the drawing. If the person handling the stroller does not continue to apply force to the handle 127, the slide member 11
7 moves forward immediately and returns to its original state.

If the handle 127 is lifted while the slide member 117 is kept moving backward, that is, while the handle 127 is kept being slid, the slide member 117 is rotated by the expansion part 125, so that the front leg 13 is moved. Due to the weight of the wheel 43 and its own weight, the hinge pin 115 rotates around the hinge pin 115, and the folding operation is performed.

After the folding operation has proceeded and the convergence state has been reached, if the hand is released from the handle 127, the slide member 117 is again urged by the spring 121 and abuts against the abutting portion 123 of the hollow portion 113. Maintain convergence.

A lower portion of the armrest member 21 is provided with a first lock mechanism 17 as in the prior art. The lever constituting the lock mechanism 17 is grasped and lifted to prevent the rotation member. This first lock comes off.
Therefore, when performing the actual folding operation, the first lock mechanism 17 that prevents the rotation of the rotation member is released with one hand, and the handle 1 of the slide lock mechanism 19 is released with the other hand.
By operating the slide member 117 and operating the slide member 117 to maintain the state where the second lock is released, the user can simultaneously perform the operation of folding the entire frame of the folding seating device with both hands.

In this way, unless the handle 127 is kept slid and the operation for folding is continued, it is impossible to actually perform folding. Therefore, it is not possible to fold just by touching the handle 127 by mistake, and it is possible to realize an extremely safe lock mechanism. Further, since the folding operation cannot be performed unless both the first lock and the second lock are released, more complete safety can be realized.

[0039]

As described above, claim 1 or claim 2
According to the invention, folding can be performed only by guiding the slide member by the handle against the urging force of the spring and maintaining the state in which the slide member does not abut on the abutting portion. It is possible to avoid the disadvantage that the folding operation can be performed.

According to the second aspect of the present invention, further, with one hand,
Release the first lock mechanism that prevents the rotation of the rotating member,
By operating the handle of the slide lock mechanism with the other hand and sliding the slide member to maintain the unlocked state, these two hands simultaneously perform the operation of folding the entire frame of the folding seating device. ,
Eventually, it is possible to provide a safe folding type seating lock mechanism of the folding seating device in which folding can be performed only when the user intends to fold and continues the folding operation.

[Brief description of the drawings]

FIG. 1 is an overall schematic perspective view showing an expanded state of a foldable stroller according to an embodiment of the present invention.

FIG. 2 (A) is a perspective view of the stroller of FIG. 1 in a collapsed state as viewed from the front leg direction. (B) is a diagram of a part of (A) viewed from the B direction (rear leg direction).

FIG. 3 is a perspective view showing a slide lock mechanism provided as a second lock mechanism when the entire frame of FIG. 1 is deployed.

4 is a longitudinal sectional view showing a state before the lock of FIG. 3 is released.

5 is a longitudinal sectional view showing a state where the lock of FIG. 3 is released.

FIG. 6 is a longitudinal sectional view showing a state where the lock of FIG. 3 is released and folding is actually being performed.

FIG. 7 is a side view showing an example of a conventional foldable stroller, where (A) is a view showing an expanded state and (B) is a view showing a converged state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Backrest part 5 Baby basket 7 Shopping basket 9 Push rod 11 Body frame (first frame) 13 Front leg 15 Second frame 21 Armrest member 25 Rear leg 35 Communication member 51 First member 53 Second member

Claims (2)

[Claims] 1. A lock mechanism for a folding seating device, wherein a plurality of frame members are hinged at a plurality of positions, and a convergence posture and an unfolding posture are taken by rotation of the hinge connection, wherein at least one of the hinge connection portions slides. A lock mechanism is provided. The slide lock mechanism is provided with two frame members hinged to each other with their ends abutting each other, and is provided outside one of the frame members and can slide in the axial direction of the one frame member. A handle, a slide member that slides in the axial direction inside the one frame member in conjunction with the handle, and a slide member that is provided on the other frame member and abuts on the tip of the slide member when the slide member slides and protrudes. It is configured to have a contact portion for preventing rotation and a spring for urging the slide member in the contact direction. A sliding lock mechanism for a folding seating device. 2. The folding seating device according to claim 1, wherein said folding seating device takes a convergence posture and an unfolding posture by pivoting of said hinge connection. On the other hand, a rear leg hinged at the upper end, a push bar hinged at the center in the vertical direction with respect to the rear of the armrest member, an upper end hinged to the lower end of the push rod, and a lower end hinged to the rear leg for rotation A frame having a pivoting member, and a communication member having one end hinged at the approximate center of the pivoting member and the other end hinged to the front leg. The seating device takes a converging posture, the pivoting member pivots and is a folding seating device in which the seating device takes an unfolding position by being positioned above, and a first lock mechanism that prevents the pivoting member from rotating. Equipped with a sliding lock mechanism, an armrest member A portion of the hinged upper end of the front leg is hinged relative to the front, the slide locking mechanism according to claim 1 folding seating apparatus wherein a is provided as a second locking mechanism.