JP2821854B2 - Reclining mechanism for infant chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining mechanism for changing a tilt angle of a backrest of a baby chair.

[0002]

2. Description of the Related Art Conventionally, Japanese Unexamined Utility Model Publication No. 4-55467 discloses that "the lower end of a backrest is pivotally attached to the rear end of a seat so as to be able to move up and down. The supporting rod is formed in a U-shape, and both ends of the supporting rod abut on a rear end side surface of the seat part so as to be able to move up and down, and are mounted on the supporting rod so as to be able to move up and down. There is known a stroller reclining mechanism configured so that a locking rod of a stopper can be selectively fitted into fitting grooves formed in several steps in the vertical direction on the back surface of a backrest.

However, in the reclining mechanism of the above-mentioned known example, when an object accidentally hits the finger-holding plate portion of the stopper, the stopper is unexpectedly moved and the locking rod comes off the fitting groove. As a result, there is a possibility that the backrest may suddenly fall backward and an infant may be thrown backward.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a safe reclining mechanism for an infant chair in which a backrest does not fall unless it is manually operated.

[0005]

In order to achieve the above object, a reclining mechanism for a high chair according to the present invention is provided with a seat 1.
Locking holes 3 are provided at a plurality of vertical positions on the back surface of the backrest 2 which is pivotally connected to the lower end portion at the rear end portion so as to be tiltable rearward, and is rotatable in the front-rear direction behind the backrest 2. A backrest support 4 is provided, the upper end of which is slidable up and down along the back of the backrest 2, and is slidable vertically along the back of the backrest 2 together with the backrest support 4. A housing 5 is rotatably attached to the upper end of the backrest support 4, and the front end of the housing 5 is urged forward by a spring 6 inside the housing 5 so that the front end of the housing 5 is provided in a locking hole 3 provided on the back surface of the backrest 2. The housing 5 includes a locking member 7 to be selectively fitted.
Is positioned behind the locking body 7 so that the head protrudes on one of the upper, lower, left and right wall surfaces, and usually prevents the locking body 7 from retreating. A lock button 8 is provided to open the rear of the lock member 7 to enable the lock member 7 to retreat, and the lock member 8 is pressed against a spring 6 at a position opposite to the lock button 8 in the housing 5 by a pressing operation. 7
Is provided with an operation button 10 having a cam portion 9 for retreating from the locking hole 3.

When the backrest 2 is depressed, the head protection body 23 is pivotally mounted above the backrest 2 in order to reliably prevent the infant from falling backward and to ensure safety measures. The upper end is rotatably connected to a rib 24 projecting from the back of the head protector 23, and is attached to the upper end of the back of the backrest 2 so as to be slidable in the vertical direction of the backrest 2. Is further provided with a movable plate 25 for rotating the head protection body 23 forward through the ribs 24 by pushing the lower end portion by the upper surface of the housing 5 and sliding the head protection body 23 upward through the rib 24 when the housing 5 is moved a required distance upward. It is desirable.

[0007]

The reclining mechanism of the infant chair according to the present invention adjusts the inclination angle of the backrest 2 by sliding the backrest support 4 vertically on the back of the backrest 2 to change the position. Then, the posture is fixed by fitting the locking body 7 into an arbitrary locking hole 3. When the locking body 7 is fitted in the locking hole 3, the locking button 8 prevents the locking body 7 from retreating and maintains the locked state. In order to retract the locking body 7 and escape from the locking hole 3, the lock button 8 must be pressed to open the rear of the locking hole 3 and the operation button 10 must be pressed. Therefore, even if something accidentally hits the operation button 10, the locking body 7 does not escape from the locking hole 3. In addition, since the lock button 8 and the operation button 10 are provided at positions opposite to each other on the housing 5, it is unlikely that the lock button 8 and the operation button 10 simultaneously hit something. Therefore, it is necessary to manually press the lock button 8 and the operation button 10 at the same time, and it is unlikely that the backrest 2 will accidentally fall down.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIG. 1, a reclining mechanism for a movable baby chair having a caster 11, that is, a so-called stroller is shown. As shown in FIG. 1, the lower end of the backrest 2 is pivotally attached to the rear end of the seat 1 so that the backrest 2 can be tilted rearward. Seat 1
Has a foldable leg, and a caster 11 is attached to the lower end of the leg.

Next, FIG. 2 shows the back of the backrest 2. A substrate 12 is mounted on the back of the backrest 2, and a back support 4 which has a substantially inverted U-shape behind the backrest 2 and is rotatable in the front-rear direction with both ends and a lower end pivotally provided. The upper end horizontal rod portion 13 of the back support 4;
A housing 5 rotatably mounted at the same location is assembled to the substrate 12 to constitute a reclining mechanism.

FIG. 3 is an enlarged view of the substrate 12, the housing 5, and the horizontal rod 13 of the backrest support 4. As shown in FIG. Substrate 12 has vertical ribs 1 on both left and right ends.
4 are provided, and the locking holes 3 are provided at a plurality of positions in the vertical direction at the inner position. As shown in FIG. 4, the horizontal rod portion 13 of the backrest support member 4 is inserted through a vertically long horizontal guide hole 15 provided in a rib 14, and is slidable vertically with respect to the guide hole 15. It has become. The housing 5 rotatably attached to the horizontal rod portion 13 of the back support 4 is located between the ribs 14 on both sides, and the leg portions 22 provided on the side surfaces on both sides are fitted into the guide holes 15 so as to be horizontal. It is slidable in the vertical direction together with the rod 13. At the center of the upper surface of the housing 5, the head of a lock button 8 that can be displaced in the vertical direction inside the housing 5 protrudes, and at the center of the lower surface of the housing 5, An operation button 10 that can be displaced in the direction protrudes.

Next, FIGS. 5 to 7 show the internal structure of the housing 5. FIG. First, as shown in FIG. 5, a locking member 7 is provided inside the housing 5 so as to be movable in the front-rear direction.
The locking body 7 has locking projections 16 at both left and right ends so as to face the locking holes 3 of the substrate 12, respectively. The locking projection 16 is fitted into the locking hole 3, and the locking projection 16 can escape from the locking hole 3 by retreating.
The forward position of the locking body 7 is regulated by a vertical wall portion 17 provided at the upper center portion of the operation button 10. The lock button 8 is disposed behind the locking member 7.
Is urged upward by a spring 18 as shown in FIG. 6 and normally rises. The lock button 8 has a convex portion 19 at the lower end of the inner surface, and has a concave portion 20 at an upper position thereof,
In the raised state, the projection 19 prevents the locking body 7 from retreating. Press the head of the lock button 8 downward and press the spring 1
When it is lowered against 8, the recess 20 is located just behind the locking body 7, the rear of the locking body 7 is opened, and the locking body 7 can be retracted. The operation button 10 is disposed below the locking member 7. As shown in FIG. 7, the operation button 10 is provided with a cam portion 9 which is a slightly inclined rear surface at a position slightly outside the center. The locking body 7 also has a rib 28 having a slope 21 at a position where the locking body 7 comes into contact with the cam portion 9. 7 shows a state in which the lock button 8 is pressed downward and the operation button 10 is pressed upward. When the operation button 10 is raised in this manner, the slope 21 is Since the locking body 7 is pushed, the locking body 7 retreats and enters the recess 20 of the lock button 8, and the locking projection 16 at the front end of the locking body 7 escapes from the locking hole 3. That is, by simultaneously pressing the lock button 8 and the operation button 10, the housing 5 and the backrest support 4 can slide with respect to the substrate 12, and the inclination angle of the backrest 2 can be changed. Since the lock button 8 and the operation button 10 are provided at opposite positions, the lock button 8 is grasped by the thumb, and the operation button 10 is grasped by other fingers, that is, the upper and lower surfaces of the housing 5 are grasped by hand. By such an operation, the lock button 8 and the operation button 10 can be easily and simultaneously pressed.

FIG. 8 shows the relationship between the positions of the housing 5 and the backrest support 4 and the angle of inclination of the substrate 12 of the backrest 2. When the housing 5 and the backrest support 4 are moved above the substrate 12, the backrest 2 and the substrate 12 of the backrest 2 are tilted rearward together with the backrest support 4, and the step is performed at a position where the locking member 7 fits into the locking hole 3. Can be fixed. Therefore, the inclination angle of the backrest 2 can be adjusted by arbitrarily selecting the locking hole 3.

As shown in FIGS. 2 and 8, the lower end of the head protector 23 is pivotally connected to the upper end of the substrate 12 of the backrest 2. The head protector 23 has a top end of a movable plate 25 rotatably connected to a tip of a rib 24 protruding from the rear surface. The movable plate 25 has an elongated hole 26 in the vertical direction, and a support pin 27 provided at the upper end of the rear surface of the substrate 12 is slidably inserted into the elongated hole 26. The lower end of the movable plate 25 is free, and when the casing 5 slides above the substrate 12, the casing 5 can be abutted. The movable plate 25 is pushed by the upper surface of the housing 5 and slides upward, whereby the rib 24 rotates forward with respect to the movable plate 25, so that the head protector 23 also rotates forward with respect to the substrate 12.
That is, when the substrate 12 of the backrest 2 is tilted backward by a required angle, the head protection body 23 automatically rises.
The head protector 23 prevents the infant from moving rearward and falling when the backrest 2 is tilted rearward. Conventionally, a stroller provided with a head protector is known, for example, from the above-mentioned known example (Japanese Utility Model Laid-Open No. 4-55467), but these head protectors have a four-bar linkage. The head protector begins to cover the top of the infant's head as soon as the backrest begins to tilt. Therefore, there is a problem that the infant feels uncomfortable because the feeling of release above the head is immediately lost. On the other hand, the head protector 23 in the present invention starts to rise after the backrest 2 inclines by a certain angle, so that the feeling of oppression is small and the comfort is good. Further, when the four-bar link mechanism is adopted, it is difficult to appropriately set the length of each link when there is a space restriction. On the other hand, in the present invention, since the movable plate 25 is vertically slid at the back position of the backrest 2, there is an advantage that the design is easy without taking up space.

[0014]

The present invention is as described above, and the backrest 2 is provided.
It is necessary to press the lock button 8 and the operation button 10 at the same time when tilting the back, so that the backrest 2 does not fall down unless it is artificially operated. It is possible to prevent an accident in which the child falls down and the infant is thrown rearward, thereby improving safety. In addition, the head protection body 23 according to claim 2.
Is provided, it is possible to reliably prevent the infant from dropping backward when the backrest 2 is tilted, thereby further improving safety.

[Brief description of the drawings]

FIG. 1 is a side view of a stroller.

FIG. 2 is a rear view of a backrest.

FIG. 3 is a front view of a reclining mechanism provided on a back surface of a backrest.

FIG. 4 is a side view of the reclining mechanism.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a sectional view taken along line BB of FIG. 3;

FIG. 7 is a cross-sectional view taken along the line CC of FIG. 5 in a state where the lock button and the operation button are simultaneously pressed.

FIG. 8 is a cross-sectional view of the reclining mechanism showing a state in which the substrate of the backrest tilts backward.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Backrest 3 Locking hole 4 Backrest support 5 Housing 6 Spring 7 Locking body 8 Lock button 9 Cam part 10 Operation button 11 Caster 12 Substrate 13 Horizontal rod part 14 Rib 15 Guide hole 16 Locking projection 17 Vertical Wall 18 Spring 19 Convex 20 Concave 21 Slope 22 Leg 23 Head protector 24 Rib 25 Movable plate 26 Slot 27 Support pin 28 Rib

Claims (2)

(57) [Claims] An engaging hole is provided at a plurality of vertical positions on a back surface of a backrest capable of pivoting its lower end portion to a rear end portion of a seat so as to be tiltable rearward. A backrest support 4 which is rotatable in the direction and whose upper end is slidable in the vertical direction along the back of the backrest 2 is provided, and the backrest support 4 and the back support 4 are vertically moved along the back of the backrest 2. Back support 4 so that it can slide freely
A housing 5 is rotatably mounted on the upper end of the backrest 2 and is urged forward by a spring 6 inside the housing 5 to selectively fit a front end thereof into a locking hole 3 provided on the back surface of the backrest 2. A locking body 7 is provided at the rear of the locking body 7 so that the head protrudes from one of the upper and lower or left and right wall surfaces of the housing 5 and normally prevents the locking body 7 from retreating. However, a lock button 8 is provided to open the rear of the locking body 7 by pressing the head and allow the locking body 7 to retreat, and at a position opposite to the locking button 8 in the housing 5. A reclining mechanism for an infant chair provided with an operation button 10 having a cam portion 9 for retracting the locking body 7 against the spring 6 by pressing operation to escape from the locking hole 3. 2. A head protector 23 is pivotally mounted above the backrest 2, and an upper end thereof is rotatably connected to a rib 24 projecting from the back of the head protector 23, and an upper end of the back of the backrest 2. When the housing 5 is moved above the backrest 2 by a predetermined distance, the lower end is pushed by the upper surface of the housing 5 and slid upward. The reclining mechanism for a baby chair according to claim 1, further comprising a movable plate (25) for rotating the head protector (23) forward through a rib (24).