JPS6322936Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of the Invention This invention relates to a locking mechanism for a table used in infant equipment such as infant chairs and child care beds.

Background of the invention FIG. 1 is a perspective view showing an infant chair to which this invention is applied, and the background that led to this invention will be explained using this figure.

The illustrated infant chair is used, for example, when feeding an infant, and has long legs. This is to ensure that the height of the infant sitting on the chair shown is approximately the same as the height of the adult sitting on the chair. Referring to the figure, an infant chair 1 includes a seat 2 and a seat 2.
A pair of handrails 3, 3 installed on both sides of the
A table 4 is provided on a pair of handrails 3, 3 so as to be slidable in the front and back direction. When an infant eats, dishes, food, etc. are placed on the table 4. In this type of infant chair 1, the table 4 is usually slidable in the front and rear directions.
This is because it is necessary to slide the table 4 forward as the infant grows. However, during normal use, table 4
It must be fixed so that its sliding is prohibited. To this end, a locking mechanism is provided to inhibit sliding of the table.

In conventional equipment for infants and toddlers such as infant chairs and child care beds, the locking metal fittings and knobs used to operate this locking mechanism are located on the side wall 5 of the table 4.
It stuck out at the top. Therefore, the following deficiencies are pointed out. That is, the infant sitting on the seat 2 can touch the side wall 5 of the table 4 in a natural posture. Therefore, if a locking metal fitting, a knob, or the like is protruding from the side wall 5, the user can naturally touch the locking metal fitting or the like. As a result, it is conceivable that the infant's hand may get caught in the metal fittings, etc., resulting in injury. In this way, it is undesirable for safety to have a protrusion within the reach of an infant sitting on the seat.

Purpose of the invention Therefore, the main purpose of this invention is to provide a locking mechanism for a table that does not expose protrusions within the reach of infants.

Summary of the invention A table locking mechanism according to this invention includes a plurality of engagement recesses formed on the bottom of a handrail so as to be aligned in the length direction thereof, a lock lever, a lock plate, and a spring. ing. The table, which is slidable in the front-rear direction, has a side wall along the side surface of the handrail at its rear portion. The above-mentioned lock lever is rotatably attached to this side wall via a pin. One end of the lock lever constitutes an action part for pressing the lock plate, and the other end protrudes from the bottom surface of the table and constitutes an operating part. In addition, the above-mentioned lock plate is
A long hole formed to extend in the vertical direction through which the lock lever mounting pin is inserted, an engagement protrusion that can engage with an engagement recess formed in the handrail, and a pressure receiving part that can be pressed by the action part of the lock lever. It has The lock plate is vertically slidable within a range in which the elongated hole and the pin can move relative to each other. The spring described above always urges the lock plate to slide upwardly.

Suppose that the table is prohibited from sliding due to the engagement between the engagement protrusion of the lock plate and the engagement recess formed in the handrail. In this state, when the operating section of the lock lever is pulled upward, the operating section of the lock lever presses the pressure receiving section of the lock plate, thereby causing the lock plate to slide downward. As a result, the engaging protrusion of the lock plate disengages from the engaging recess formed in the handrail, thus allowing the table to slide.

Effects of the invention As is clear from the above configuration, according to this invention, the lock lever for unlocking the lock mechanism and the lock plate that slides in conjunction with this lock lever do not protrude from the side wall of the table. Since the lock mechanism does not protrude above the bottom surface of the table, it is a highly desirable locking mechanism for safety reasons. That is, when an infant sitting in a seat is in a natural position, their hands are usually placed on the surface or side wall of the table, and they are never expected to reach the bottom of the table. It is. Therefore, an infant's hand will not get caught on a protrusion and become injured. Furthermore, with conventional locking mechanisms, it is conceivable that the lock may be released while an infant is fiddling with the locking metal fittings protruding from the side wall of the table, but with this design, the lock can be released within the reach of infants. There is no need to worry about that as the lock lever is protruding from the top.

Examples of this invention will be described below with reference to the drawings.

DESCRIPTION OF EMBODIMENTS As described above, FIG. 1 is a perspective view showing an infant chair to which this invention is applied.
As shown in the figure, the table 4 has a side wall 5 along the side surfaces of a pair of handrails 3, 3 at its rear part. The table locking mechanism according to this idea is
Although they are provided on the left and right sides in connection with the pair of handrails 3, 3, the configurations of the left and right sides are basically the same, so the lock mechanism related to the left handrail 3 will be described below.

FIG. 2 is a diagram showing the left handrail 3, in which a is a plan view, b is a side view seen from the right side, and c is a front view. 3 is a bottom view of the handrail of FIG. 2, and FIG. 4 is an end view taken along the line - in FIG. 3. As is clear from FIGS. 3 and 4, a plurality of engagement recesses 6 are formed in the bottom surface of the handrail 3 so as to be aligned in the length direction thereof.

Fig. 5 shows the table 4, where a is a plan view, b is a side view seen from the left side, and c is a cutaway view seen from the back side. Fig. 6 is a view of the table in Fig. 5 seen from the bottom side. Fig. 6 is a view of the table in Fig. 5 seen from the bottom side. Fig. 7 is an end view seen along the line - in Fig. 5, and Fig. 8 is a cutaway view of the table in Fig. 5 seen from the bottom side.
The figure is a cross-sectional view taken along line 1 in FIG.
The figure is a cross-sectional view taken along line - in Fig. 5. As is clear from Figs. 5, 6 and 9, a guide wall 7 is erected on the underside of the table 4 in a position close to the side wall 5 and parallel to the side wall 5. This guide wall 7 is for guiding the sliding of the table 4 in the forward and backward directions. That is, a pair of handrails 3, 3 provided on both sides of the seat 2 (see Fig. 1) are sandwiched between the side wall 5 of the table 4 and the guide wall 7. In this embodiment, in order to guide the sliding of the table 4 more easily and appropriately, a table guide 8 shown in Fig. 10 and a table hook 9 shown in Fig. 11 are attached to the table 4.

Referring to FIG. 6, table guide 8 is installed in area A adjacent to side wall 5 of table 4, and table hook 9 is installed in area B on an extended line of guide wall 7. FIG. 12 is an end view taken along line - in FIG. 6. 10th
With reference to FIGS. 12 to 12, the table guide 8 is
Its top wall 10 is attached to the table 4, and its bottom wall 11 is brought into contact with the lower end of the handrail 3. The bottom wall 11 has a wave shape as shown. This is table guide 8
This reduces the friction between the table 4 and the handrail 3, and the existence of this wave shape allows the table 4 to slide smoothly. Further, as is clear from FIG. 12, the side wall 12 of the table guide 8 has a shape corresponding to the side surface of the handrail 3, and further has a protrusion 13 that comes into contact with the side surface of the handrail 3. This side wall 12
The projections 13 are for effectively preventing the table 4 from shifting in the left-right direction. Also,
Since only the protrusion 13 of the side wall 12 of the table guide 8 comes into contact with the handrail 3, the friction between the side wall 12 and the handrail 3 is small.

The table hook 9 has its top wall 14 attached to the table 4 and its bottom wall 15 in contact with the lower end of the handrail 3. The bottom wall 15 also has a hook 16 that projects upward. The lower end of the handrail 3 is positioned between this hook 16 and the side wall 17 of the table hook 9. Therefore, the presence of this hook 16 effectively prevents the table hook 9 from shifting in the left-right direction.
That is, the table 4 is reliably prevented from shifting in the left-right direction due to the presence of the side wall 12 of the table guide 8 and the table hook 9 described above. Also,
Bottom wall 11 of table guide 8 and table hook 9
Due to the presence of the bottom wall 15, the table 4 is also prevented from shifting in the vertical direction.

Referring to FIG. 6, a locking mechanism according to the invention is provided in connection with the rearmost portion of the side wall 5 of the table 4. That is, the main elements constituting the lock mechanism are installed in the area indicated by C in FIG. The lock mechanism according to this invention includes a plurality of engagement recesses 6 (third
), a lock lever 18 shown in FIG. 13, a lock plate 19 shown in FIG. 14, and a spring 20 shown in FIG. 15. In FIG. 15, a is a side view of the spring 20, and b is a front view of the spring 20. FIG. 16 shows that the lock lever 18, lock plate 19 and spring 20 are
FIG. 17 is a side view showing the state where the device is installed in the area shown in FIG.
FIG. 3 is a cross-sectional view taken along line - in the figure.

Referring to FIGS. 13, 16, and 17, the lock lever 18 is rotatably attached to the side wall 5 of the table 4 via a pin 21. As shown in FIGS. This lock lever 18 has a substantially doglegged shape. One end 22 constitutes an action section for pressing a lock plate 19, which will be described later, and the other end 23 protrudes from the bottom surface of the table 4 and constitutes an operation section. That is, when releasing the lock of the lock mechanism, this operating section 2
3 in the direction shown by arrow D in FIG. Further, a spring receiving portion 24 is provided on the side surface of the lock lever 18 to which one end portion of the spring 20 is attached.

Referring to FIGS. 14, 16 and 17, lock plate 19 has side walls and a bottom wall;
A long hole 25 extending vertically is formed in the side wall. Further, the bottom wall 27 is connected to the lock lever 1 described above.
8 constitutes a pressure receiving part to be pressed by the action part 22 of No. 8. Furthermore, an engaging convex portion 26 is formed on the bottom wall 27 and projects upward. This engaging protrusion 26
As shown in FIG. 17, the lock plate 19
When in a predetermined position, it can be engaged with the engagement recess 6 of the handrail 3. Further, as is clear from FIG. 17, the side wall of the lock plate 19 is sandwiched between the side wall 5 of the table 4 and the lock lever 18. Then, move the lock lever 18 to table 4.
pin 21 for rotatably mounting on the side wall 5 of
is inserted through the elongated hole 25 of the lock plate 19. In this way, the lock plate 19 has the elongated hole 25
and pin 21 can be slid vertically within a relatively movable range. As shown in FIGS. 16 and 6, the side wall of the lock plate 19 has both sides formed by the rear wall 28 of the table 4 and the guide projections 29 formed on the side wall 5 of the table 4 and extending vertically. I'm caught in the middle. Therefore, the vertical sliding of the lock plate 19 is appropriately guided by the rear wall 28 and the guide protrusion 29. Further, as shown in FIG. 14, an upper plate 31 having a notch 30 is provided on the upper part of the lock plate 19. The other end of the spring 20 is fitted into the notch 30 .

With reference to FIGS. 15 and 16, the spring 20
is a torsion spring or a tight spring, one end of which is attached to the spring receiving part 24 of the lock lever 18, and the other end of which is attached to the notch 3 of the lock plate 19.
It is inserted into 0. As a result, this spring 20 is
The lock plate 19 is always urged to slide upward.

In the lock mechanism having such a structure, it is assumed that the table 4 is currently at a predetermined position and its sliding movement is prohibited. That is, as shown in FIG. 17, when the engagement protrusion 26 of the lock plate 19 engages with one of the plurality of engagement recesses 6 formed in the handrail 3, the table 4 Sliding is prohibited. In this state, the operation part 2 of the lock lever 18
3 in the direction shown by arrow D in FIG. Then, the acting portion 22 of the lock lever 18 presses the pressure receiving portion 27 of the lock plate 19. Thereby, the lock plate 19 slides downward against the force of the spring 20. That condition is the first
This is shown in Figure 8. As a result, lock plate 19
The engaging convex portion 26 of is removed from the engaging concave portion 6 of the handrail 3. In this way, it becomes possible to slide the table 4 in the front-back direction. After the table 4 has been slid to a predetermined position, when the hand that was pulling up the lock lever 18 is released, the lock plate 19 automatically slides upward by the action of the spring 20. As a result, the lock plate 19 Engagement protrusion 26
and the engagement recess 6 of the handrail 3 engage with each other. thus,
Sliding of the table 4 is prohibited.

As described above, in the lock mechanism according to this invention, the member for operating the lock mechanism does not protrude from the side surface of the table 4, but only from the bottom surface, which is very favorable in terms of safety. Become something. That is, when an infant sitting on a seat is in a natural posture, their hands are usually placed on the surface or side of the table 4.
If an infant tries to reach the bottom of the table, a very difficult posture is required.
However, under normal circumstances, infants would not adopt such an unreasonable posture. Furthermore, the table 4 used in the embodiment of this invention has a U-shaped rear portion, as shown in FIGS. 5 and 6. The infant's body is positioned within this U-shaped recess. Therefore, the location where the lock lever 18 and the like are installed is located almost directly beside the infant. This can also be said to be very advantageous in terms of safety. In other words, infants' hands are usually placed in front of their bodies, and it is unthinkable for them to reach almost directly to the side and even to the bottom of the table.

Since the members such as the lock lever 18 are projected out of the reach of infants in this manner, there is no possibility that the infant's hands may get caught on these members and cause injury. Also, infants cannot play with the lock lever 18, etc., so
There is no possibility that the locking mechanism will be unlocked due to mischief.

Although the embodiment described above was a locking mechanism applied to an infant chair, the invention may equally be applied to other infant devices such as infant beds.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an infant chair to which this invention is applied. FIG. 2 is a diagram showing the left handrail 3 used in the infant chair shown in FIG. 1, in which a is a plan view, b is a side view seen from the right side, and c is a front view. be. FIG. 3 is a view of the handrail of FIG. 2 viewed from the bottom side. Figure 4 shows the third
FIG. 3 is an end view taken along line - in the figure; FIG. 5 is a diagram showing the table 4 used in the infant chair shown in FIG. 1, in which a is a plan view, b is a side view seen from the left side, and c is a rear view. It is a cutaway diagram. FIG. 6 is a view of the table of FIG. 5 viewed from the bottom side. Figure 7 shows the line -
FIG. FIG. 8 is a sectional view taken along line - in FIG. 5. FIG. 9 is a cross-sectional view taken along line - in FIG. 5. FIG. 10 is a perspective view showing the table guide. FIG. 11 is a perspective view showing the table hook. FIG. 12 is an end view taken along line - in FIG. 6. FIG. 13 is a perspective view of the lock lever. FIG. 14 is a perspective view of the lock plate. FIG. 15 is a diagram showing the spring, in which a is a side view and b is a front view. 1st
FIG. 6 is a side view showing the lock lever, lock plate, and spring installed in area C of FIG. 6. Figure 17 shows the line -
It is a front sectional view seen along. Figure 18 shows
This is a view similar to FIG. 16, but showing the lock plate sliding downward. In the figure, 1 is a baby chair, 2 is a seat, and 3 is a baby chair.
1 is a handrail, 4 is a table, 5 is a side wall, 6 is an engaging recess, 18 is a lock lever, 19 is a lock plate, 20 is a spring, 21 is a pin, 22 is an acting part, 2
3 is an operating portion, 25 is a long hole, 26 is an engaging convex portion, 27
indicates the pressure receiving part.

Claims (1)

[Scope of Claim for Utility Model Registration] Used for an infant device comprising a seat, a pair of handrails provided on both sides of the seat, and a table provided on the handrails so as to be slidable in the front and back direction. , a locking mechanism for a table configured to prohibit sliding of the table when the table is in a predetermined position, the table having a side wall along a side surface of the handrail at a rear portion thereof; a plurality of engagement recesses formed on the bottom surface of the handrail so as to be aligned in the length direction thereof; and a plurality of engagement recesses formed on the bottom surface of the handrail so as to be rotatable via a pin, and one end of the engagement recesses is rotatably attached to the side wall of the table via a pin, and one end thereof is actuated. a lock lever whose other end protrudes from the bottom surface of the table to constitute an operating section;
The lock lever has a long hole formed to extend in the vertical direction through which the pin is inserted, an engagement protrusion that can be engaged with the engagement recess, and a pressure receiving part that can be pressed by the action part of the lock lever, and A lock plate that is slidable up and down within a range in which the long hole and the pin can move relative to each other, and a spring that biases the lock plate to always slide up and down; When the operation part is pulled upward, the action part of the lock lever presses the pressure receiving part of the lock plate, thereby the lock plate slides downward, and as a result, the engagement protrusion is disengaged from the engagement recess. A locking mechanism for a table used in an infant device that allows the table to slide.