JP2580001B2 - Stroller lock operation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stroller that can be manually pushed and carried with an infant, and more particularly to a stroller lock operating device that is easy to assemble and fold.

(Prior art and its problems) Conventionally, there have been known various types of strollers of this type which are assembled and used, and are folded and carried or stored when an infant cannot be carried. However, many of them require an operation to release some locks, for example, when folded, or require a lock operation when assembling or when pressing face-to-face with an infant. 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.

(Problems to be solved by the invention) An object of the present invention is to solve the problems of the conventional device, and not only the assembling operation and the folding operation are simplified, but also various lock operations and various unlock operations. It is an object of the present invention to provide a stroller lock operating device which can be implemented in a concentrated and comprehensive manner by operating means provided at one place of the stroller.

(Means for Solving the Problems) The present invention solves the problems of the conventional example described above by using the following "stroller lock operating device". That is, in a stroller having a pair of left and right front wheels and a rear wheel and driving by pushing a push rod, the other end of the front leg in which the pair of left and right front wheels is rotatably fixed to one end is a pair of left and right armrests, respectively. The other end of the rear leg, which is pivotally fixed to each front end of the base of the base, and the pair of left and right rear wheels are rotatably fixed to one end, respectively, is pivotally attached to the respective front end of the armrest,
A pair of left and right balance links pivotally attached to the rear end of the base and the rear leg, respectively, and left and right pivotally attached to the rear end of the armrest, the left and right being fixed integrally with the push rod. A pair of bases, a substantially L-shaped L-link pivotally connected to a center of the base and a center of the rear leg, respectively;
An extension rod pivotally connected to an extension of the link and an extension of the balance link, a standing leg pivotally attached to a base arm fixed to a lower end of the base, and a substantially central portion of the standing leg A connection link pivotally connected to the left and right links, a fixed connection rod connecting the pair of left and right front legs to each other, a fixed connection bar connecting the pair of left and right rear legs to each other, and one of the front legs And a first bar having both ends pivoted between the other end of the L link and a first bar having both ends pivoted between the other of the front legs and one of the L links. A second bar, the second bar forming a first cross, a third bar and a fourth bar having one end pivotally connected to each of the pair of L-links, and the other end pivotally supported to each other; Both ends are pivoted between the first and third bars and between the first and third bars. A fifth bar and a sixth bar which are mutually formed to form a second cross, means for locking the assembled state and the folded state of the stroller, respectively, and for controlling a locking operation and an unlocking operation of the locking means. And a sliding means provided inside the base, and an operating knob means provided on the push rod for driving the sliding means.

(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 a pair of left and right front legs 3 having two front wheels 2 rotatably mounted at one end is pivotally attached to the front end of the base 4 and to the front end of the armrest 5 (FIG. 3). reference). 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. At the other end of each of the pair of right and left armrests 5, an upper end of the base 9 is provided (by a pin 32 described later).
The base 9 is connected and fixed to a substantially U-shaped push rod 8 during assembly. A balance link 10 is provided between the rear upper part of each of the pair of left and right bases 4 and the rear leg 7.
A gently curved substantially L-shaped L-link 11 shown in the figure is also pivotally connected between the base 9 and the rear leg 7. The lower ends of the balance link 10 and the L link 11 each have an extended portion slightly extended from the lower pivot point, and both ends of the extension rod 12 are pivotally attached between the respective ends of the extended portion. I have. Reference numeral 13 denotes a standing leg for allowing the stroller to stand on its own as shown in FIG. 4 when the stroller 1 is folded, and is fixed to a base rear member 33 described later. Further, as shown in FIGS. 1 and 5, a pair of footrest members 16 and 17 are provided which are pivotally attached to the lower portions of the left and right front legs 3. The foot rest members 16, 17 can be bent at the center when the baby carriage is folded, as shown in FIG. Also, between the backrest pillars 50 and 51, two arm members pivotally supported at a substantially central portion so as to be bent when folded.
52 and 53 are provided.

The stroller in the assembled state as shown in FIG. 2 reaches the folded and upright state shown in FIG. 4 through the intermediate stage shown in FIG. This is a change from the side of the stroller,
When viewed from the front, it is folded from the assembled state shown in FIG. 5 also in the left-right direction as shown in FIG. 6, resulting in a compact state.

Next, the mechanism from the state shown in FIG. 5 to the state shown in FIG. 6 will be described. As shown in FIG. 7, the folding mechanism in the left-right direction is characterized by a first cross composed of a first bar 54 and a second bar 55, each of which is pivotally supported at a substantially central point, and a fifth bar. It is in a link configuration of a second cross composed of a 58 and a sixth bar 59, and a third bar and a fourth bar supporting the second cross. The front ends of the first bar 54 and the second bar 55 constituting the first cross are pivotally supported at point F (see FIG. 17) of the left and right front legs, and the rear ends are L-links 11.
(See FIG. 17). One end of each of the third bar 56 and the fourth bar 57 is pivoted at the H point, and the other end is pivoted at the I point of the L link 11 (see FIG. 17). The fifth bar 58 and the sixth bar 59 have one end pivotally connected to a point J as shown in FIG. 7, and the other end has a first bar 54 and a second bar 55.
Are pivoted at the K point.

In such a link configuration, when the stroller is folded, the two points GI provided on the L link 11 move away from the F point provided on the front leg 3 because the L link 11 retreats with respect to the front leg 3. Moving. Therefore, the third lever 56 and the fourth lever 57 bend from the state shown in FIG. 7 to the state shown in FIG. Along with this, the second cross (58,5
9), the first cloth (54, 55) also has a closed shape as shown in FIG.

Along with such a folding operation, the footrest members 16 and 17 and the arm members 52 and 53 are also bent as shown in FIG. 6, and the stroller is reduced in size to approximately half the size in the left-right direction. As shown in FIG. 8, the handrail 28, which is a place for placing the hand of the infant, has link members 61 to 61 whose both ends are pivoted to each other.
The link members 61 and 63 are pivotally attached to the distal end of the armrest 5. Therefore, at the time of assembly, the handrail 28 having the shape shown in FIG. 8 (a) becomes as shown in FIGS. 8 (b) and 6 when folded.

As described above, the stroller 1 includes the front and rear legs 3, 7 and the standing
By means of a series of link members including 3, it is possible to change from the assembled state shown in FIG. 2 to the folded state shown in FIGS. 4 and 6 via the intermediate state shown in FIG. In this state, the rear wheel 6 and the standing leg 13 enable 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. 9 is a drawing showing a detailed structure of a notch-slider provided inside the base column 9 and slidably provided by a wire, and a square pipe 9A is provided inside the hollow base column 9. The lower end is fixedly accommodated in the lower end of the base 9, and a wire pulling body 9C having one end connected to a spring 9B fixed to the square pipe 9A is loosely fitted inside the square pipe 9A, Since this wire pulling body 9C is fixed to one end of the wire 18 in the square pipe, it can be slid by being pulled by the wire 18. The slider 19 having a prism 19A having a size enough to fit completely into the outer periphery of the square pipe 9A,
Since it is fixed to the wire pulling body 9C, it can be slid by being pulled by the wire 18 and using the square pipe 9A as a guide. 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. 9, the slider 19 uses the square pipe 9A fixed in the
18 slidably provided against the spring 9B.

Next, the pulling operation means of the wire 18 will be described in detail with reference to FIGS. FIGS. 10 (d) to 10 (f) show a reel 24 connected to the knob 23 for winding the metal wire 18, for example. The knob 23 and the reel 24 are preferably formed of a plastic material. As is apparent from the bottom view of the knob 23 in FIG. 10 (c), the knob 23 is provided with two small ridges 23A and 23B, Since these are fitted into the two grooves 24A and 24B provided on the reel 24, the reel 24 can also be rotated in accordance with the rotation operation of the knob 23. No.
10 (a) to 10 (c) are provided at a substantially central portion (see FIGS. 1, 5 and 6) on the front side of the push rod 8 formed into a substantially U-shape during assembly. Knob for wire operation 23
It is. The knob 23 and the reel 24 are shown in FIG.
(B) and (c) are rotatably accommodated in an operation case 25, and one ends of two wires 18 on the left and right are connected to two through holes 24C, 24D ( Each of the two pins 26A and 26B (see FIG.
2 (a) and 2 (b)) by appropriate means (for example, welding, caulking).

Therefore, by rotating the knob 23 in the direction of the arrow shown in FIG. 12 (a), the wire 18 having one end fixed to the pins 26A and 26B is wound around the reel 24, and thus the slider described in FIG. 19 is almost upward against the spring 9B,
Further, it can move downward according to the spring 9B.

Next, the detailed structure of the operation case 25 and the structures of the two links A and B and the two holders 95 and 97 incorporated therein will be described in detail. The operation case 25 includes an upper case 25A as shown in FIG. 13 and a lower case 25B as shown in FIG.
The upper case 25A has an opening 25A-1 into which the upper part of the shaft of the reel 24 is fitted, and a pair of rims 25A-2, 25A-3 into which the protrusion 23C of the knob 23 is fitted and locked. The ridge 23C falls into the recess between the rims 25A-2 and 25A-3, and the knob 23 is locked. Although this will be described later, when the baby carriage 1 is folded from the use state (assembled state), the knob is used.
When the knob is rotated by 180 ° from the initial state of 23 (the state of the knob indicated by the dotted line in FIG. 11A), the knob 23 is temporarily locked. Since the rim 25A-3 is formed with the slope 25A-4, the ridge 23C can easily ride on the rim and reach the depression (see FIG. 13 (b)). The case 25A has a pair of guide pins 25A-5 for guiding the wire 18 as shown in FIG.
Connecting pin 25A- for connecting with the screw 25B-1 and functioning as a rotation axis of holders 95 and 97 described later.
6 are provided. The lower case 25B is connected to the upper case 25A as shown in FIG.
A coupling pin 25B-2 is provided to serve as a rotating shaft of 97. Further, a lock member 25B-3 for locking links A and B described later (a lock for fixing the push rod 8 in an assembled state of the stroller) is provided, and the lock member 25B-3 is provided.
The hatched portions of the links A and B (65B, 66)
Lock the links A and B by inserting them into the B), that is, the holder
95, 97 and the push rod 8 are configured to be locked.
In FIG. 14, 25B-4 is a column for rotatably supporting the lower part of the shaft of the reel 24 as shown in FIG. 11 (c), and the lock member 25B-3 is at a small distance (at least). It also functions as a guide column for sliding (a distance corresponding to the depth of the recess). Since the lock member 25B-3 is constantly pressed by the leaf spring 100, the links A and B can be locked at the position shown in FIG. 11 (a). When the knob 23 is rotated by 180 ° (that is, when the state of FIG. 11A is changed to the state of FIG. 11B), the unlocking projection 24E provided on the reel 24 is locked by the lock member 25B-3. The upright portion 25B-3A is pressed against the spring 100 as shown in FIG. 11 (b). As a result, the hatched portions of the lock members 25B-3 are detached from the concave portions 65B and 66B of the links A and B, so that the locks of the links A and B are released.

Inside the operation case 25 (see FIG. 11 (c)) in which the upper case 25A and the lower case 25B are connected by the screw 25B-1, a shape as shown in FIGS. 15 (a) and 15 (b) is provided. Link A,
B and the head 95-A of the holders 95 and 97 are incorporated.
Pins 65A and 66A are implanted in the links A and B, respectively, as shown in the figure, and locking recesses 65B and 66B and holes 65C and 66C for guiding the movement of the ricks A and B are provided. Have been.
On the other hand, FIGS. 16 (a) and 16 (b) show the structure of the holder 95 (the holder 97 has the same structure).
FIGS. 16 (a) and 16 (b) show the upper half and the lower half of the holder 95, respectively, which are connected by screws 101 to form an integral holder 95. Upper and lower body heads of holder 95
Notch 95B provided in 95A is for forming an elongated opening through which wire 18 passes when the upper and lower halves are joined. In the lower half of FIG. 16 (b),
Opening 95C for insertion of 66A and pin 65A of link A
There is provided an opening 95D for inserting a hole. 95E is
It is a curved surface for guiding the wire 18 as shown in FIG. 95F is a holder 95 into which the pipe of the push rod 8 is inserted and fixed when the upper and lower halves are joined.
Of the handle.

As described above, inside the operation cane 25, the pins 65A and 66A of the links A and B are inserted into the holes 95C and 95D of the holder 95 (and 97), respectively. By inserting the coupling pin 25A-6 (25B-2) into the opening 95G of the portion, it can be rotated about the rotation pin. That is, the holder is moved from the assembled state (used state) shown in FIG. 11 (a) to the folded state shown in FIG. 11 (b).
The 95 head 95A becomes rotatable. At this time, the links A and B can also move as shown.

In FIG. 11 (c), the upper case 25A and the reel 24
A compression spring 102 is provided between the
The knob 23 is spring-biased in a direction to press the third ridge 23C against the rims 25A-2 and 25A-3.

By setting the outer diameter of the reel 24 and the diameter of the portion where the wire 18 is pulled large, the amount of pulling of the wire can be performed with a relatively small rotation.

Various configurations related to the operation knob have been described with reference to FIGS. 10 to 16. Next, regarding the operation knob, various operations from the locking operation at the time of assembly and the releasing operation to the folding state will be described. State.

First, in the assembled state of the baby carriage 1, the operation knob 23 is at the position shown in FIG. 11D (the position where the arrow of the knob points to P1), and at this position, the holders 95 and 97 are in the positions shown in FIG.
As shown in FIG. At this time, link A,
In B, since the upright portions (portions indicated by oblique lines) of the lock members 25B-3 are fitted into the recesses 65B and 66B (see FIG. 11 (a)), the links A and B are locked. . Since the links A and B are locked and fixed as described above, the holder head 95A engaged with the links A and B via the pins 65A and 66A is also fixed,
The state shown in FIG. 11 (a) is maintained.

Next, when it is desired to fold the stroller, the knob 23 is rotated by 180 ° in the direction of the arrow so that the arrow reaches the position from P1 to P3. When the knob reaches the position indicated by the dotted line in FIG. However, the rim 25A is opposed to the spring 102 shown in FIG.
-3 slope 25A-4, two rims 25A-2 and 25A-
The knob 23 fits into the recess provided between the knobs 3 and the knob 23 is locked once in that position. At this time, the projection 24E of the reel 24
Has reached the position shown in FIG. 11 (b), the upright portion of the lock member 25B-3 is pressed against the leaf spring 100 by the projection 24E, and the portions of the upright portion indicated by oblique lines are links A and B. (See FIG. 11 (b)). That is, the locks of the links A and B are released, and the movement of the links A and B (that is, the link from FIG. 11 (a) to FIG. 11 (b))
A, B movement) becomes possible. Therefore, here holder 95,
By rotating the 97 to the position shown in FIG. 11 (b), it becomes possible to bring the stroller into a folded state (see FIG. 6).

Here, in the state where the knob 23 is simply rotated to the position P3 from the state of FIG. 11A (the state where the holders 95 and 97 are in a straight line), the locks of the links A and B are unlocked as described above. Has just been achieved. That is, the reel 24
11B reaches the state shown in FIG. 11 (b) and only presses the lock member 25B-3 to the unlocked position.
Since B has not yet started moving, the knob return projection 66D of the link B is still at the position shown in FIG. 11 (a).
However, in this state, the holders 95, 97
When the link starts to rotate, the links A and B are connected as shown in FIG.
In (b), since they move to the left and right respectively, the protrusion 66D provided on the link B starts moving to the right. At this time, the projection 66D comes into contact with the projection 24E of the reel 24, and the slope provided on both projections is used. The projection 24E is lifted upward against the elasticity of the spring 102 (the knob 23 is also lifted integrally). ), The ridge 23C of the knob 23 is the rim 25A-2, 25A-3.
It is separated from the hollow between them. As a result, the knob 23 is free to rotate through the wire 18 by the elasticity of the spring 9B described in FIG. 9, and can return to the position P1 shown in FIG. 11D. In this way, the state of the knob 23, the operation case 25, and the holders 95 and 97 in the folded state is changed to the eleventh state.
As shown in FIG. 2B, compact folding of the baby carriage 1 in the left-right direction is achieved. In this state, the links A and B, the holder and the like are not locked, but the folded state is locked by the lock engagement between the pin E and the hook 30C as described later.

Next, when in the assembled state, the reels A and B are locked by the lock members in the operation case 25 and
5,97 are locked in a straight line.

As described above with reference to FIGS. 10 and 16, the wire 18 is pulled by the turning operation of the knob 23, whereby the slider 19 can slide.

Next, the operation of the slider 19 and various lock operations and unlock operations will be described in detail with reference to FIGS. 17 to 20. First, the lock member 30 indicated by a bold line in FIGS. 17A and 17B is configured to be slidable along a column 31 functioning as a guide. That is, of the constituent members 30A and 30B, the member 30A has a through hole into which the column 31 is loosely fitted, a hook 30C for maintaining and locking the folded state when the baby carriage is folded, and the protruding pin A. A member 30B is fixed to the member 30A so as to be able to move integrally with the member 30A, and has a hook 30D for locking a state at the time of assembling the baby carriage, as shown by a thick line in FIG. 17 (a). It is a plate member of a shape. The upper end of the column 31 is pivotally attached to the rear end of the armrest 5, and a pivot pin 32 for pivoting the push rod base 9 to the armrest 5 (see FIG. 18).
It is possible to share with. On the other hand, the lower end of the column 31 is
The lower end of the base rear member 33 having a shape that appears to contact the rear edge of the base 4 during assembly to form the rear end of the base 4.
33A (see FIGS. 17 and 18), and this pivoting method is also used to pivot the base 9 to the lower end 33A of the base rear member 33 as described above. Attach pin 34 (see Fig. 18)
It is possible to share with. The lock member 30 is constantly urged downward in the drawing by a spring (not shown), and is configured to engage with a notch N1 provided on the slider 19 described later and be pulled upward by the slider 19. .

FIGS. 19 and 20 are drawings for explaining the moved position (three types) of the slider 19 having two notches N1 and N2 and the functions (lock function and unlock function) in each case.

First, the position of the slider 19 shown by a thick line in FIG. 19 indicates a case where the initial position, that is, the knob 23 is at the position of the initial position P1 in FIG. 11 (d). At this time, the pin A of the lock member 30 is located at the uppermost end of a notch N1 having an elongated notch in the slider 19 as shown in FIG. At this initial position, the assembled state is locked in the state of FIG. 19 in which the stroller is assembled. That is, the hook 30D of the lock member 30 (FIG. 17) engages with the lock pin B fixed to the rear leg 7, and the lower end 33A of the base rear portion 33 presses and engages the curved portion of the L link 11. . Therefore, a series of link engagement relations including the front and rear legs described with reference to FIGS.
(Pin B) is locked by being pinched by the lower end 33A and the hook 30D, respectively. The locked state at the time of this assembly is, as described later, until the pin A is hooked on the lowermost end of the notch N1 of the slider 19 and slightly lifted upward, so that the lock engagement between the hook 30D and the pin B is released. Will be maintained.

In the state shown in FIG. 19, a pair of left and right pins C (FIG. 5) planted inward on the base pillar are click-fixed by a pin receiver 35 provided at the rear end of the armrest 5.

In the initial position of the slider 19 shown in FIG. 19, when the knob 23 is turned to the position P2 by the operator, the slider 19 moves slightly upward to the position shown by the thin line in FIG. Therefore, the pin A is substantially at the center position of the notch N1 (that is, the position where the notch N1 can be detached from the pin A), and the push rod 8 is rotated as shown by an arrow in FIG. 19 (rotated so as to fall forward). Then, the slider 19 rotates to the position shown by the dotted line, and the pin D slides on the notch N2 of the slider 19 and slides on the inclined surface of the cut-in entrance (at this time, the spring 9B which is urging the slider 19 with the spring is turned). (Slightly stretched). In this manner, the push rod 8 is locked at the position indicated by the dotted line in FIG. 19, and the mother pushing the baby carriage can face the infant, for example. In order to release this face-to-face pressing state, the knob 23 that has automatically returned to P1 only needs to be slightly turned in the direction of P2, and the lock between the pin D and the notch N2 is released in this manner. Thereafter, the push rod 8 is returned to the position shown by the solid line in FIG. 19, and then the knob 23 is returned to the position P1, thereby forming the above-described initial state (locked state at the time of assembly).

Next, from the assembled state of the stroller (FIG. 19), FIG.
The operation from the deformation to the folded state as shown in FIG.

First, when the knob 23 is rotated by approximately 180 degrees from P1 to P3, the lowermost end of the notch N1 of the slider 19 contacts the pin A during the rotation (see FIG. 20).
Continues to rise, so that pin A also rises while being hooked to the lowermost end of notch N1, and slider 19 and pin A
This is the position indicated by the dotted line in FIG. Hook in this position
30D is disengaged from pin B as shown by the dotted line, so that the locked state during assembly is released. After this, turn knob 23 to P3
When the folding operation is started after turning to the position shown in FIG. 4, the stroller 1 is moved from the link engagement state (assembled state) in FIG. 1 or FIG. 2 (FIG. 5) through the intermediate state shown in FIG. It can be in the folded state shown in FIG. L
Pin E fixed to link 11 (see FIGS. 2 and 17)
At the time of assembly, as shown in FIGS.
33, it is housed in a recess provided in the recess, but according to the folding operation, the rotation center C1 (second
17 and FIG. 17), the knob 23 returns to the position P1 from the position P3 when the knob 23 returns to the position P1. When the folding operation is completed, the hook 30C of the lock member 30 (FIG. 17) is rotated.
Locks the pin E of the L link 11 (in the state shown in FIGS. 4 and 6). To change from the folded state to the assembled state again, the lock engagement between the pin E and the hook 30C may be released by rotating the knob 23 to P3. After the lock is released, the rear knob 23 is automatically returned to P1 in the assembled state as shown in FIG. 2 so that the locked state (the engagement between the hook 30D and the pin B and the lower end of the base rear part 33) The locked state by the engagement 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, the plurality of links including the front leg, the rear leg standing leg, the armrest, the base, the push rod base, and the first and second crosses are compactly configured, and the stroller is provided. Since the locking operation and the unlocking operation at the time of assembling and folding in both the front and rear directions and the left and right directions are all performed intensively and comprehensively by the operation means provided at one place of the stroller, as in the conventional example, It is not necessary to extend the hand, so that the lock operation and the lock release operation are significantly simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall structure of the baby carriage of the present invention, and FIGS. 2 to 4 show a state in which the linkage of the baby carriage of the present invention is assembled (FIG. 2) through an intermediate state (FIG. 3). FIG. 5 is a side view showing a state in which the state is changed to a folded state (FIG. 4). FIGS. 5 and 6 are front views showing states of an assembling state and a folding state, respectively. FIGS. 8 (a) and (b) are drawings showing a detailed configuration of a handrail, FIG. 9 is an exploded perspective view showing an internal configuration of a base of a push rod, FIG. 10A to 10C are plan views, side views, and bottom views showing knobs, respectively, and FIGS. 10D to 10F are plan views, side views, and bottom views showing reels, respectively, and FIG. FIGS. 12 (a) to 12 (d) are configuration diagrams for explaining the internal configuration of the operation case and the states at the time of assembly and folding, respectively, and FIG. FIGS. 13 (a), 13 (b) and 14 (b) are configuration diagrams for explaining the operation of the reel, holder and wire in the operation case, respectively.
The figures are a plan view, a side view, a bottom view, and a perspective view for explaining the shapes of an upper case and a lower case, respectively, of the operation case.
FIGS. 15 (a) and 15 (b) are perspective views showing the structure of the links A and B, respectively. FIGS. 16 (a) and (b) are perspective views showing the structure of the holder, and FIGS. FIG. 18 is a main part side view for explaining the relation between the operation of the lock member and the slider and the locked state and the unlocked state (however, FIG. 18 is a perspective view of the main part). 1 ... baby carriage, 2 ... front wheels, 3 ... front legs, 4 ... base,
5 ... armrest, 6 ... rear wheel, 7 ... rear leg, 8 ... push rod, 9 ... base pillar, 10 ... balance link, 11 ... L link, 12 ... stay rod, 13 ... Standing leg, 14 ... Base arm, 15 ... Linking link, 16, 17 ... Footrest member, 18 ... Wire, 19 ...
... Slider, 20 ... Screw, 21 ... Bush, 22 ... Bolt, 23 ... Knob, 24 ... Reel, 25 ... Operation case, 26 ... Pin, 27 ... Pedestal, 28 ... Handrail, 30 lock member, 31 support column, 32 pivot pin, 33 rear base member, 34 pivot pin, 35 pin receiver, 50, 51
Backrest pillars, 52, 53 ... arm members, 54, 55 ... first cross, 58, 59 ... second cross, 61-63 ... link members, 64
…… Protective cover, 25A-6, 25B-2 …… Connection pin, 25B-
3. Lock member, 95 Holder, 95A Head, 95F
… Handle, 100… leaf spring, 101… screw, 102… spring, N1, N2… notch, P1 to P3… knob rotation position,
AE: Pins, C1, C2: Center of rotation.

Claims (4)

(57) [Claims] 1. A stroller having a pair of left and right front wheels and a rear wheel and driven by pushing a push rod: one end is rotatably mounted on a front wheel, and the other end is a front end of a pair of left and right armrests and a pair of left and right bases. Front legs respectively attached to the front ends of the base: rear legs having one end rotatably mounted on the rear wheel and the other ends mounted on the respective front ends of a pair of left and right armrests; A pair of right and left balance links each having an end pivotally attached to the rear end and the rear leg; fixed integrally with the push rod, and an uppermost end pivotally attached to the rear end of the armrest; A pair of right and left bases: a substantially L-shaped L link pivotally attached to a substantially central portion of the base and a substantially central portion of the rear leg, respectively; an extension of the L link and the balance link; A tie rod pivotally attached to the extension, respectively; A standing leg pivotally attached to a base arm fixed to a lower end portion of the base; a connecting link pivotally attached to a substantially central portion of the standing leg and the L-link; A rear leg connecting rod connecting the pair of left and right rear legs to each other; and a second end pivotally connected between one of the front legs and the other of the L link. A bar; both ends pivoted between the other of the front legs and one of the L-links;
A second bar rotatably supported at a central point with the first bar to form a first cross with each other;
A third bar and a fourth bar each having one end pivotally supported on each of the links and the other end pivotally supported; between the second bar and the fourth bar, and between the first bar and the third bar; A fifth bar and a sixth bar, both ends of which are pivotally supported to form a second cross with each other; locking means for locking the assembled state and the folded state of the baby carriage, respectively; A sliding means provided inside the base for controlling the locking operation and the unlocking operation of the base; and an operation knob means provided on the push rod for driving the sliding means. A stroller lock operating device. 2. The armrest and the base according to claim 1, wherein the armrest and the base are formed in an internal central structure, and a pivoting portion between the front leg and the base and the armrest, and a rear chest and the armrest are connected to each other. A pivot portion and a pivot portion between the balance link and the base are respectively housed in the armrest and the base, so that the pivot portions are not exposed to the outside. The lock operating device for a baby carriage according to claim 1. 3. A baby carriage having a pair of left and right front wheels and a rear wheel and driven by pushing a push rod: one end is rotatably mounted on the front wheel, and the other end is a front end of a pair of left and right armrests and a pair of left and right bases. A front leg mounted on each front end of the base; a rear leg mounted on one end rotatably mounting the rear wheel and the other end mounted on each front end of a pair of left and right armrests; A pair of right and left balance links each having an end pivotally attached to the rear end and the rear leg; fixed integrally with the push rod, and an uppermost end pivotally attached to the rear end of the armrest; A pair of left and right bases; a substantially L-shaped L link pivotally attached to a substantially central portion of the base and a substantially central portion of the rear leg, respectively; an extended portion of the L link and the balance link; An extension rod pivotally connected to the extension, respectively; A standing leg pivotally attached to a base arm fixed to a lower end of the base; a connecting link pivotally attached to a substantially central portion of the standing leg and the L link; A connected front leg connecting rod: a rear leg connecting rod connecting the pair of left and right rear legs to each other; a first end having both ends pivoted between one of the front legs and the other of the L link. A bar; both ends pivoted between the other of the front legs and one of the L-links;
A second bar pivotally supported at a central point to form a first cross with each other;
A third bar and a fourth bar, one end of each of which is pivotally supported and the other end of which is pivotally supported, between the second and fourth bars, and between the first and third bars; A fifth bar and a sixth bar, both ends of which are pivotally supported to form a second cross with each other; locking means for locking the assembled state and the folded state of the baby carriage, respectively; A sliding means provided inside the base for controlling the locking operation and the unlocking operation of the base, the sliding means comprising a slider having two notches; and an operation for driving the sliding means Means for operating a lock for a stroller. 4. An operating means for driving a sliding means, an operating case, a reel housed in the operating case for winding the wire, two links, and these links. 4. A stroller lock operating device according to claim 3, wherein the lock operating device comprises a pin and a holder engaged with the pin.