JP2671994B2 - Pram structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a baby carriage that can be hand-carried by carrying a baby, and particularly to a link structure for a baby carriage that is easy to assemble and fold.

(Prior Art and Problems Thereof) Various types of prams that are assembled and used in this type of pram and that are folded, carried, or stored when a baby is not placed are known. However, many of them require an operation to unlock some locks, for example, when they are folded, or one lock operation when they are assembled or when they are face-to-face with a child. There was inconvenience. In addition, since the lock release operation and the lock operation are scattered at various positions of the stroller, it is not only necessary to extend the hand to the position to perform the operation, but also to perform the various lock positions. Had to be memorized.

(Problem to be solved by the English) The present invention aims to solve the problems of the conventional device, and not only simplifies the assembling operation and the folding operation, but also various lock operations and various unlock operations. It is an object of the present invention to provide a stroller link structure that can be carried out centrally and comprehensively by operating means provided at one location of the stroller.

(Means for Solving the Problem) The present invention solves the problems of the conventional example described above by the following "link structure of a baby carriage". `` In a baby carriage having a pair of left and right front wheels and a rear wheel driven through a push rod, the other end of the front leg rotatably fixed to one end of each of the left and right front wheels has a pair of left and right armrests. The other ends of the rear legs, which are pivotally attached to the front ends of the bases, respectively, rotatably fix the pair of left and right rear wheels to the one ends, are pivotally attached to the front ends of the armrests, respectively. A pair of left and right balance rings pivotally attached to the rear end and the rear leg, respectively, and a pair of left and right bases that are fixed integrally with the push rod and whose uppermost ends are pivotally attached to the rear ends of the armrests. A pillar, a substantially L-shaped L-link pivotally attached to the central portion of the base pillar and the central portion of the rear leg, and an extension portion of the L-link and an extension portion of the balance link And a supporting rod pivotally attached to the base arm fixed to the lower end of the base column. A connecting link pivotally attached to the approximately central portion of the standing leg and the L link; a fixed connecting rod connecting the left and right front legs to each other; and a left and right rear legs to each other. A fixed connecting rod, a means for locking the assembled state and the folded state of the stroller, and an operating means for operating locking and unlocking by the locking means. Link Structure. ”(Embodiment) An embodiment of the present invention shown in the drawings will be described in detail below.

FIG. 1 is a perspective view showing a schematic configuration of the stroller in a usable state at the time of assembling, and FIG. 2 is a side view showing a state of link engagement of the stroller 1 in an assembled state. From the state through the intermediate state shown in FIG. 3, the state becomes the folded state (self-standing state) shown in FIG. FIG. 5 and FIG.
It is a front view of the baby carriage at the time of assembly and at the time of folding, respectively. With reference to these drawings, a link engagement structure of the baby carriage 1 according to the present invention will be described below. The other end of each of the pair of left and right front legs 3 having the two front wheels 2 rotatably attached to one end is pivotally attached to the front end of the base 4 and the front end of the armrest 5. (See FIG. 3). On the other hand, the other end of each of the pair of left and right rear legs 7 to which the rear wheel 6 is attached at one end is the front end of the armrest 5 and is pivotally mounted slightly above the pivot point of the front leg 3. An upper end portion of a base pillar 9 is pivotally attached (by a pin 32 described later) to the rear ends of the pair of left and right armrests 5, and the base pillar 9 includes a pair of vertical members and an upper end portion of the vertical members. Is fixedly connected to a push rod 8 having a substantially U-shaped shape formed of a traverse member connecting to each other. A balance link 10 is pivotally mounted between the rear upper part of each of the pair of left and right bases 4 and the rear leg 7, and a gently curved line between the base column 9 and the rear leg 7 is also shown.ゞ L-shaped L link 11
Is pivoted. This balance link 10 and L link 11
The upper ends of the respective rods each have an extension portion slightly extended from the lower pivot point, and both ends of the strut bar 12 are pivotally attached between the respective tips of the extension portions. Reference numeral 13 is a standing leg formed in a general U-shape so that the stroller can stand by itself as shown in FIG. 4 when the stroller 1 is folded. The standing leg 13 is located at a position close to its foot 13A. In addition, the base arm 9 is pivotally attached to a base arm 14 integrally fixed to the base post 9, and a connecting link 15 is pivotally attached to the L link 11. In addition, between the right and left of the pair of left and right front legs 3 and the rear legs 7, a fixed connecting rod 16 for connecting the two is provided.
17 are fixed respectively (see FIGS. 5 and 6). It should be noted that 27 and 28 in FIG. 1 are a pedestal and a handrail on which the young child sits.

As described above, the stroller 1 is changed from the assembled state shown in FIG. 2 to the intermediate state shown in FIG. 3 by the series of link members including the front leg 3, the rear leg 7, and the standing leg 13 to the state shown in FIG. It becomes possible to change to the folded state shown in the
In the state shown in the drawing, the rear wheel 6 and the standing leg 13 allow the vehicle to stand on its own. Conversely, it is of course possible to freely change the folded state shown in FIG. 4 to the assembled state shown in FIG.

Since the armrest 5 and the base 4 are formed in a hollow structure (preferably formed of plastic), the respective pivotal joints with the front leg 3 and the rear leg 7 are hidden in the hollow interior and externally. Is not exposed, so that the appearance can be kept beautiful and it is convenient.

FIG. 7 is a view showing a detailed structure of a notched slider slidably provided by a wire provided inside the base 9, and a square pipe 9A is provided inside the hollow base 9. The lower end of is fixedly accommodated in the lower end of the base 9, and inside the square pipe 9A, a wire pulling body 9C connected to a spring 9B having one end fixed to the square pipe 9A is loosely fitted, Since this wire pulling body 9C is fixed to one end of the wire 18 in the square pipe, it can be pulled by the wire 18 and slide. Since the slider 19 having the prismatic portion 19A that is large enough to fit in the outer periphery of the square pipe 9A is fixed to the wire pulling body 9C, it can be pulled by the wire 18 and slide using the square pipe 9A as a guide. is there. That is, the slider 19 is fixed to the wire pulling body 9C together with the bolting 22 via the bush 21 by the screw 20. The protrusion 22A of the bolt stopper 22 is configured to be slidable in one slit (not shown) provided on one surface of the square pipe 9A.

As described above with reference to FIG. 7, the slider 19 uses the square pipe 9A fixed in the base column 9 as a guide, and the wire 18
Is provided slidably against the spring 9B.

Next, FIGS. 8 (a) to (e) and FIG. 9 (a) to
The index operating means for the wire 18 will be described below with reference to FIG. FIGS. 8 (a) to 8 (c) show a generally central portion (FIGS. 5 and 6) on the front side of the push rod 8 formed in a generally U-shape.
8 (d) to 8 (e) shows a reel 24 connected to the knob 23 for winding a wire 18 made of, for example, a metal. The knob 23 and the reel 24 are preferably made of a plastic material, and as is apparent from the bottom view FIG. 8 (c) of the knob 23, the knob 23 is provided with two small protrusions 23A, 23B, This is the two grooves 24A, 24 provided on the reel 24.
Since they are fitted in B respectively, the reel 24 also rotates in response to the rotation operation of the knob 23. The knob 23 and the reel 24 are rotatably accommodated in a metal fitting 25 as shown in FIGS. 9 (b) and 9 (c), and one end of each of the left and right two wires 18 is provided on the reel 24. Book through-holes 24C, 24D (8th
It is fixed to each of the two pins 26A and 26B fitted in FIG. (D) by appropriate means (for example, welding or caulking).

Therefore, by rotating the knob 23 in the direction of the arrow shown in FIGS. 9A and 9B, the wire 18 whose one end is fixed to the pins 26A and 26B is taken up by the reel 24.
The slider 19 mentioned in the figure will move approximately upwards against spring 9B and downwards according to spring 9B.

In FIGS. 9 (a) to 9 (c), the knob 23 is provided such that its rotation center substantially coincides with the axis of the push rod 8, but as shown in FIG. 9 (d) instead. It is also possible to dispose the center of rotation C2 eccentrically from the axis L of the push rod 8 to provide a knob and a reel. Further, it is possible to set the diameter of the reel 24, that is, the diameter of the wire winding portion, to be large as in the modification shown in FIG. 9 (e). Such an increase in diameter has the advantage that the wire winding operation can be performed with a relatively weak turning force.

As described above with reference to FIGS. 8 and 9, the wire 18 is pulled by the turning operation of the knob 23, whereby the slider 19 can be slid.

Next, the operation of the slider 19 and various lock and unlock operations will be described in detail with reference to FIGS. 10 to 13. First, in FIGS. 10 (a) and 10 (b), the lock member 30 is configured to be slidable along a column 31 that functions as a guide thereof. That is, the member 30 that constitutes the lock member 30.
Among A and 30B, the member 30A is a member having a through hole into which the support column 31 is loosely fitted, a hook 30C for maintaining and locking the folded state when the stroller is folded, and a protruding pin A, while one member 30B is It is a plate-like member having a shape as shown in FIG. 10 (a), which is fixed to the member 30A so as to be movable integrally with the member 30A and has a hook 30D for locking the state at the time of assembling the baby carriage. The upper end of the column 31 is pivotally attached to the rear end of the armrest 5 and can also be used as a pivot pin 32 (see FIG. 11) for pivotally attaching the base post 9 of the folding rod to the armrest 5. . On the other hand, the lower end 33A (10th portion) of the base rear member 33 having a shape that seems to contact the rear end edge of the base 4 during assembly to form the rear end of the base 4 during assembly. Figure,
(See FIG. 11), and this pivoting method is also used to pivotally attach the base post 9 to the lower end 33A of the base rear member 33 as described above. (See the figure). The lock member 30 is constantly urged downward in the drawing by a spring (not shown), and is engaged with a notch N1 provided in the slider 19 described later to engage the slider 19.
It is configured so that it can be pulled upward by.

12 and 13 are views for explaining the moved position (three types) of the slider 19 having the two notches N1 and N2 and the function (lock function and unlock function) in each case.

First, the position of the slider 19 shown by the solid line in FIG. 12 shows the case where the initial position, that is, the knob 23 is at the position of the initial position P1 in FIG. 9 (a). At this time, the pin A of the lock member 30 is located at the uppermost end of the notch N1 having the elongated notch of the slider 19 as shown in FIG. In this initial position, the assembled state is locked in the state of FIG. 12 in which the baby carriage is assembled. That is, the hook 30D of the lock member 30 (FIG. 10) engages with the lock pin B fixed to the rear leg 7 and the base rear member 33.
The lower end portion 33A of the L presses the curved portion of the L link 11 into engagement.
For this reason, before the description described with reference to FIGS. 1 to 6
A series of link engagement relationships including the rear leg are locked by the L link 11 and the rear leg 7 (pin B) being sandwiched by the lower end portion 33A and the hook 30D, respectively. In this locked state at the time of assembly, the pin A is notched on the slider 19 as described later.
It is hooked at the lowest end of N1 and lifted slightly upward so that it is maintained until the locking engagement between hook 30D and pin B is released.

In this state (shown in FIG. 12), the pair of left and right pins C (FIGS. 5 and 6) planted inwardly in the base pillar are clicked by the pin receiver 35 provided at the rear end of the armrest 5. It is fixed.

At the initial position of the slider 19 shown in FIG. 12, when the knob 23 is rotated by the operator to the position P2, the slider 19 moves slightly upward to the position shown by the dotted line in FIG. Therefore, the pin A is located at a substantially central position of the notch N1 (that is, the position where the notch N1 can be removed from the pin A), and the push rod 8 is rotated as shown by the arrow in FIG. 12 (rotated so as to be tilted forward). Then, the slider 19 rotates to the position shown by the chain double-dashed line, and the pin D slides on the notch N2 of the slider 19 along the inclined surface of the notch inlet (at this time, the spring biasing the slider 19 is urged). 9B is slightly stretched) Enter.
In this way, the push rod 8 is locked at the position indicated by the alternate long and two short dashes line in FIG. 12, so that, for example, the mother who pushes the baby carriage can face the infant. In order to release this face-to-face pressing state, the knob 23 which has been automatically returned to P1 can be turned slightly in the direction of P2, and the lock between the pin D and the notch N2 is released in this way. Then, push the push rod 8
By returning to the position shown by the solid line in FIG. 12 and then returning the knob 23 to the position P1, the above-mentioned initial state (locked state during assembly) is formed.

Next, from the assembled state of the baby carriage (Fig. 12) to Fig. 4 (Fig. 6)
The operation from the deformation to the folded state as shown in FIG.

First, when the knob 23 is rotated approximately 180 degrees from P1 to P3, the lowermost end of the notch N1 of the slider 19 comes into contact with the pin A in the middle thereof (see FIG. 13).
Continues to rise, the pin A also rises until it is hooked at the lowermost end of the notch N1, and the slider 19 and the pin A are in the positions shown by the dotted lines in FIG. At this position, the hook 30D is detached from the pin B as shown by the dotted line, so that the locked state at the time of assembly is released. After this, turn knob 23
When entering the folding work in the position of P3, the baby carriage 1
4 and 6 from the link engagement state (assembled state) of FIG. 1 or 2 (FIG. 5) through the intermediate state shown in FIG.
It can be folded as shown. The pin E (see FIGS. 2 and 10) fixed to the L-link 11 is
At the time of assembly, as shown in Figs. 2 and 10, the base rear member
33, it is housed in a recess provided in the recess, but according to the folding operation, the rotation center C1 (second
(Fig. 10 and Fig. 10), the hook 30C of the lock member 30 (Fig. 10) is rotated when the knob 23 is returned from the position of P3 to P1 after the folding operation is completed and is rotated along the locus shown by the dotted line. Lock the pin E of the L-link 11 as shown in FIGS. 4 and 6. In order to change the folded state to the assembled state, the lock engagement between the pin E and the hook 30C may be released by rotating the knob 23 to P3. After releasing the lock, by returning the knob 23 to the assembled state as shown in FIG. 2 to P1, this time the locked state in the assembled state (engagement of the hook 30D and the pin B and the lower end of the base rear member 33). The locked state by the connection of the portion 33A and the L link 11) can be formed as described above.

(Effects of the Invention) As described above, according to the present invention, a plurality of links including a front leg, a rear leg, a standing leg, an armrest, a base and a base of a push rod are compactly configured, and when the baby carriage is assembled and folded. All of the lock operation and unlock operation of each of
Since the operation means provided at one location of the baby carriage centrally and comprehensively implements, it is not necessary to extend the hand one by one as in the conventional example, and therefore, the locking operation and the unlocking operation are significantly simplified. To be demonstrated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a baby carriage according to the present invention. Second
FIGS. 4 to 4 are side views showing a state in which the link engagement state of the baby carriage of the present invention changes from the assembled state (FIG. 2) to the intermediate state (FIG. 3) and the folded state (FIG. 4). 5 and 6 are front views showing a state at the time of assembling and folding, respectively, and FIG. 7 is an exploded perspective view showing an internal configuration of a base column of the push rod, and FIGS. 8 (a) to 8 (c). ) Is a plan view, a side view and a bottom view showing the configuration of the knobs, respectively.
FIGS. 9D and 9E are plan views and side views showing the configuration of the reel, and FIGS. 9A to 9C are plan views showing the configuration of the operating means, schematic plan sectional views, and schematic side views, respectively. Sectional views, FIGS. 9 (d) and (e) are schematic partial sectional views showing modifications of the operating means, and FIGS. 10 to 13 show the operation of the lock member and the slider and the locked state and the unlocked state. FIG. 11 is a side view of a main part (however, FIG. 11 is a perspective view of the main part) for explaining the relationship. 1 ... baby carriage, 2 ... front wheels, 3 ... front legs, 4 ... base,
5 ... Armrest, 6 ... Rear wheel, 8 ... Push rod, 9 ... Base column, 10 ... Balance link, 11 ... L link, 12 ... Strut rod, 13 ... Standing, 14 ... Unit Arm, 15 ... Link, 1
6,17 …… Fixing connecting rod, 18 …… Wire, 19 …… Slider, 20 …… Screw, 21 …… Bushing, 22 …… Bolting, 23 …… Knob, 24 …… Reel, 25…
… Metal fittings, 26 …… Pins, 27 …… Pedestals, 28 …… Handrails, 30…
… Lock member, 31 …… Staff, 32 …… Pivot pin, 33 …… Base rear member, 34 …… Pivot pin, 35 …… Pin receiver, N1, N2
...... Notch, P1, P2 …… Knob rotation position, AE ……
Pins, C1, C2 ... Center of rotation.

Claims (1)

(57) [Claims] 1. A pair of front legs 3 supporting a front wheel 2 at a lower end portion thereof, a pair of rear legs 7 supporting a rear wheel 6 at a lower end portion thereof, and the front leg 3 and the rear leg 7 at a front end portion thereof. An armrest 5 that pivotally supports the upper end, a base 4 that pivotally supports the middle portion of the front leg 3 at the front end, and a base rear member 33 that is arranged behind the base 4, It is composed of a pair of left and right balance links 10 pivotally attached to the rear end of the base 4 and the rear leg 7, respectively, and a pair of vertical members and a horizontal member connecting the upper ends of the vertical members. A push rod 8 having a substantially U-shape and a base column 9 to which the lower end of the longitudinal member of the push rod 8 is fixed to the upper end, the upper part of which is pivotally supported to the rear part of the armrest 5 (32).
A pair of left and right base pillars 9 whose lower parts are pivotally supported (34) to the base rear member 33, and the balance link 10 which is substantially the central portion of the base pillars 9 and the substantially central portion of the rear legs 7. L-shaped, which is pivoted at a position closer to the rear wheel 6 than the mounting position of
The link 11 and the projecting rod 12 whose ends are pivotally attached to the lower extension of the L link 11 and the lower extension of the balance link 10, respectively.
A standing leg 13 whose lower portion is pivotally attached to a base arm 14 fixed to the lower end of the base column 9, and an end portion of which is pivotally attached to a substantially central portion of the standing leg 13 and the L-link 11. Connecting link 15 and a fixed connecting rod 16 for connecting the pair of left and right front legs 3 to each other.
And a pair of fixed connecting rods 17 for connecting the pair of left and right front legs to each other.
Locking means 30 for locking the stroller 1 in its assembled and folded positions, respectively, slidably mounted on a column 31 extending from the rear end of the armrest 5 to the base rear member 33. A member 30A having a hook 30C that engages with a pin E fixed to the L-link 11 in order to hold the folded position in a locked state, and a member 30B that moves simultaneously with the member 30A.
And a member 30B having a hook 30D that engages a pin B fixed to the rear leg 7 for holding the assembled position in a locked state
And a lock means 30 for controlling the lock means 30, which is provided inside the base 9 for driving the pin A fixed to the member 30A of the lock means 30. A baby carriage provided with a moving means and an operating knob means provided on a transverse member of the push rod 8 for sliding the sliding means, the sliding means being housed in the base 9. A pipe 9A, a spring 9B whose lower end is fixed to the pipe 9A, a wire draw body 9C attached to the upper end of the spring, and a slider which moves following the wire draw body 9C. Is formed by a slider 19 having a pair of notches N1 and N2 extending in the vertical direction, and the one notch N1 is opened rearward and the other notch N2 is opened forward. In the normal state, the elastic force of the spring 9B causes the spring The rider 19 is pulled back to the lower position, whereby the pin A collides with the upper end of the notch N1 and the baby carriage is ready for use, and the operation knob means 23 rotates the reel 24 and the reel 24. The knob 23 and the wire 18, one end of the wire 18 is attached to the wire pulling body 9C, the other end is attached to the reel 24, whereby the operation knob means 23 1st position against the force of spring 9B
When operated up to P2, the sliding means moves to the first position,
The pin A is released from the locking means 30 and the push rod 8 is moved to the pin 34.
When the notch N2 can be arranged in the facing position by rotating in the forward direction around the position, and the operating knob means 23 is further operated to the second position P3 against the force of the spring 9B, the sliding means moves to the second position. And the pin A abuts against the lower end of the notch N1 and is further moved by the locking means 30 to release the member 30B of the locking means 30 so that the baby carriage can be folded to the folding position. Two-way foldable stroller structure.