JP2015145145A - Baby carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a baby carriage that avoids a fault etc., and is very safe for a rider such as a baby etc.SOLUTION: A baby carriage 1 has a ride part 2, an armrest part 12, a front whee part 3, a rear wheel part 7, a front leg part 5, and a rear leg part 9, and a handle part 16 is arranged outside a support part in both side directions of a rider and can be arranged selectively on a front side or rear side. The front wheel part and rear wheel part each have a caster part and also include a fixation part 3h for fixing a moving direction, and further have change parts 12a, 18 for operating fixation parts of the front wheel part and rear wheel part and so on. The change parts have a switch part 12c which moves inward from a surface of the armrest part, and the moving direction of one of the fixation parts of the front wheel part and rear wheel part is fixed according to the movement of the switch part.

Description

  The present invention relates to a stroller for carrying an infant.

A stroller for carrying an infant is used, for example, for shopping or outdoor air bathing. Such a stroller has a riding part such as a seat for carrying an infant and a wheel part composed of a front wheel and a rear wheel, and further, a handle used by the operator of the stroller to move the stroller. I have.
If the stroller operator moves the stroller to the infant's front side using the front wheel located on the front side of the infant and the rear wheel located on the rear side when the infant sits on the seat, Is arranged behind the infant on the seat so that the operator can easily operate it.
At this time, the operator of the stroller performs a so-called back push operation of the stroller while looking at the rear side of the infant. In this case, the front wheel of the stroller has a caster structure that can freely change the 360 ° direction. On the other hand, the rear wheel has a structure that cannot be rotated and is fixed in a specific direction, so that the operator of the stroller can easily operate.

By the way, the operator of the stroller having such a structure not only operates from the rear side of the infant riding on the seat, but also may need to operate the stroller while watching the state of the infant. Therefore, the handle of the stroller has a structure that can move to the front side of the infant, that is, the front wheel side.
In this case, the operator of the stroller performs so-called face-to-face operation in which the rear wheel is operated forward and the front wheel is operated rearward, and the rear wheel on the front side of the stroller is fixed and does not rotate. The caster structure allows the direction to be freely changed.
In this case, there is a problem that it is difficult for the operator to operate when changing the direction of the stroller.
For this reason, both the front wheels and the rear wheels are structured so that the direction of the caster structure and the like can be freely changed, and the front wheels and the rear wheels are selectively moved by moving the handle for switching between the back-side push and the face-to-face push. A proposal has been made in which only one side of the wheel has a caster structure and the other has a fixed structure (for example, Patent Document 1).

Japanese Patent No. 4994925

However, in the stroller disclosed in Patent Document 1, a change device for fixing or non-fixing (a caster structure or the like) of a front wheel and a rear wheel by moving a handle is disposed outside an armrest disposed in the vicinity of a seat on which an infant rides. It protrudes as a separate member, and this member is configured to slide on the side surface of the armrest.
Further, a plurality of the separate members are arranged on the armrest.
For this reason, during use of the stroller, contact of any member or the like is likely to occur with respect to the above-mentioned separate member, and the change device may easily break down when contacted, which has been a problem. .
In addition, since the changing device is configured to slide the surface of the armrest in this way, there is also a problem that an infant on board may accidentally touch and injure.
In addition, the wire connected to the changing device has also been extended to the sliding member.

  Therefore, an object of the present invention is to provide a baby stroller that avoids breakdowns and that is very safe for a passenger such as an infant.

  According to the present invention, the object is to provide a riding part for placing a rider, an armrest part arranged on a side of the rider on the side of the rider, and a front wheel part arranged on the front side of the rider. And a rear wheel portion disposed on the rear side of the rider, and a front leg portion and a rear leg portion that support the front wheel portion and the rear wheel portion, respectively, and can be selectively disposed on the front side or the rear side. And the front wheel part and the rear wheel part have a caster part capable of freely changing the moving direction and a fixing part for fixing the moving direction. A change part for operating or inactivating the fixing parts of the front wheel part and the rear wheel part, and the change part has a switch part that moves inward from the surface of the armrest part. And, based on the movement of the switch part, one of the front wheel part or the rear wheel part. Is achieved by stroller, characterized in that said a structure for fixing the moving direction of the fixing unit.

According to the above-described configuration, the changer has the change part for operating or inactivating the fixing part that fixes the operation of the caster part that freely moves the front wheel part and the rear wheel part of the stroller. It has a switch part which moves toward the inside from the surface of a part, and it has composition which fixes the movement direction of one fixed part of a front wheel part or a rear wheel part based on movement of a switch part.
For this reason, the movement of the switch part of the changing part for fixing the moving direction of one fixing part of the front wheel part or the rear wheel part is not configured to slide the surface of the armrest part. It is a movement toward the direction, and the exposed part of the switch part is extremely limited.
Therefore, while the stroller is in use, contact with any member or the like is unlikely to occur with respect to the switch portion, so that the change portion is unlikely to fail.
In addition, since the exposed part of the switch part is extremely limited, the possibility that the infant riding in the riding part may accidentally touch and injure can be made extremely small, which is safe for passengers such as infants. Become a stroller.

  Preferably, a positioning portion for determining an arrangement position of the handle portion is formed on the armrest portion, and the switch portion moves in an inner direction of the armrest when the handle portion is positioned by the positioning portion. It is characterized by becoming.

  According to the above configuration, when the handle portion is positioned by the positioning portion, the switch portion moves in the direction of the inside of the armrest. Therefore, the handle portion is accurately moved to the position where the switch portion should be operated. And the switch part can be operated appropriately. Therefore, it is possible to prevent malfunction of the switch unit.

  Preferably, the switch part is arranged on the surface of the armrest part so that a part of the switch part protrudes, and is configured to move by contacting the handle part.

  Preferably, the switch portion is disposed on a surface of the handle portion so that a part thereof protrudes, the positioning portion is a protruding positioning protrusion, and the handle portion is engaged with the positioning protrusion. When the engaged portion is formed, and when the engaged portion is engaged with the positioning protrusion, the part of the switch portion protrudes from the handle portion, and enters the armrest portion. It is the structure which moves to be inserted.

According to the said structure, since a switch part is not arrange | positioned at an armrest part, passengers, such as the infant who has got on the boarding part, do not touch a switch part accidentally, etc., and generation | occurrence | production of an injury etc. is prevented beforehand. Can do.
In addition, when the engaged portion is engaged with the positioning protrusion, a part of the switch portion protrudes from the handle portion, so that the engaged portion is engaged with the positioning protrusion. When not in the combined state, the switch part does not protrude from the handle part.
Therefore, even when the operator moves the handle portion along the armrest portion in order to selectively arrange the handle portion on the front side or the rear side, the switch portion formed on the handle portion is Smooth operation can be guaranteed without hindering movement.

  The present invention can provide a baby stroller that avoids breakdowns and that is very safe for a passenger such as an infant.

1 is a schematic perspective view showing a stroller according to a first embodiment of the present invention. It is the schematic which shows the wheel support part etc. except the wheel of the front wheel part of FIG. It is the schematic which shows the rotation body 3f of FIG. It is the schematic which shows the state which the engagement nail | claw of the lock | rock part engaged with the engagement hole of FIG. It is a schematic explanatory drawing which shows rocking | fluctuation of the handle | steering-wheel part of FIG. (A) is the schematic which shows the structure of the handle part and armrest seen from the arrow B direction of FIG. 1, (b) is the schematic which deleted the armrest on the inner side (armrest) side of the handle part. It is the schematic which shows the armrest of FIG. It is the schematic which shows the receiving part arrange | positioned in the middle of the inner wire arrange | positioned over the front leg part and rear leg part of FIG. It is a schematic sectional drawing which shows the relationship etc. of the protrusion part of FIG. It is the schematic which shows the principal part of the stroller concerning the 2nd Embodiment of this invention. It is a GG line schematic sectional drawing of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.
In the following description, the directions such as front, back, left, right, up, and down are based on an infant properly seated with the stroller pushed back unless otherwise specified. .

(First embodiment)
FIG. 1 is a schematic perspective view showing a stroller 1 according to a first embodiment of the present invention. A stroller 1 shown in FIG. 1 is a single-seater baby carriage that is used for, for example, shopping or outdoor bathing, for example, carrying an infant or the like who is a passenger whose target age is one month to 36 months. Can be used in a sleeping or sitting position.
Further, the stroller 1 shown in FIG. 1 has a seat portion 2, for example, which is a riding portion for allowing an infant or the like to sit or lie down, and the seat portion 2 has an area of the seat portion 2 or the like. There is a seat adjustment member 2a for changing in accordance with the size of the infant on board. The seat adjustment unit 2a is configured to move forward and backward from the seat unit 2 so that a user, for example, a guardian or the like can adjust the seat unit 2 to a desired size. It can be configured.

As shown in FIG. 1, the stroller 1 has two front wheel portions 3 and a front wheel portion 4.
As shown in FIG. 1, the front wheel portion 3 has two circular wheels 3a and 3b, and also has a wheel support portion 3c that supports these wheels 3a and 3b.
Similarly, the front wheel portion 4 has wheels 4a and 4b and a wheel support portion 4c.

  As shown in FIG. 1, these two front wheel portions 3 and 4 are connected to pipe-like front leg portions 5 and 6 of the stroller 1, respectively. That is, the front wheel portions 3 and 4 are supported by the front leg portions 5 and 6.

FIG. 2 is a schematic diagram showing the wheel support portion 3c and the like excluding the wheels 3a and 3b of the front wheel portion 3 of FIG.
As shown in FIG. 2, the wheel support portion 3c has a wheel support portion main body 3e, and the wheel support portion main body 3e is formed with a wheel shaft arrangement portion 3d that supports the wheels 3a and 3b.
Further, a rotating body 3f is arranged on the upper part of the wheel support part main body 3e, and a front wheel mounting part 3g for mounting the wheel support part 3c on the front leg part 5 is arranged on the upper part.
And the wheel support part main body 3e and the rotation body 3f are the structure which can be rotated 360 degrees with respect to the front wheel mounting part 3g of the upper part.
That is, with this structure, the front wheel portion 3 has a configuration corresponding to a caster portion whose movement direction can be freely changed.

FIG. 3 is a schematic view showing the rotating body 3f of FIG. As shown in FIG. 3, the rotating body 3f has a disk shape.
By the way, as shown in FIG. 2, the wheel support portion 3c is provided with, for example, a lock portion 3h that is a fixed portion that can swing along the direction of arrow A in FIG.
As shown in FIG. 2, the lock portion 3h has a hook-like engagement claw 3i at its tip, and when the lock portion 3h swings toward the rotating body 3f and reaches the rotating body 3f, 3 is engaged with the engagement hole 3j of the rotating body 3f, obstructs the rotation of the wheel support body 3e and the rotating body 3f, and is fixed in a fixed direction, that is, in the straight direction of the stroller 1 in FIG. ing.

  FIG. 4 is a schematic view showing a state in which the engaging claw 3i of the lock portion 3h is engaged with the engaging hole 3j in FIG. In the state shown in FIG. 4, the rotation of the wheel support body 3e and the rotating body 3f is inhibited by the lock portion 3h, and is fixed in a specific direction.

  The front wheel part 4 shown in FIG. 1 is similarly supported by the front leg part 6, and the rear wheel parts 7 and 8 on the rear side of the seat part 2 are connected to the rear leg parts 9 and 10 in the same configuration, It is supported.

By the way, as shown in FIG. 1, between the front leg part 5 and the front leg part 6, the footrest 11 for the infant who boarded to put a leg is formed.
In addition, for example, two armrests 12 and 13 are formed on both sides of the seat portion 2 in the left-right direction, which are armrest portions on which the infant riding on the seat portion 2 can place the arm.
As shown in FIG. 1, the armrest 12 is connected to the front leg portion 5 and the rear leg portion 9. Similarly, the armrest 13 is connected to the front leg portion 6 and the rear leg portion 10, respectively. And these front leg parts 5 and 6 and rear leg parts 9 and 10 move so that it may approach and separate at the time of folding operation, and at that time, these front leg parts 5 and 6 and rear leg parts 9 and 10 are armrest 12, 13, the relative position is changed. For this reason, these front leg parts 5 and 6 and rear leg parts 9 and 10 are connected with armrests 12 and 13 so that change of this position is possible, respectively.
On the other hand, a front guard 20 is detachably disposed in front of the two armrests 12 and 13 so as to prevent the infant on board from dropping.
The rear ends of the armrests 12 and 13 are connected to and supported by connecting rods 14 and 15, respectively.

Further, as shown in FIG. 1, the connecting rod 14 is swingably connected to the seat portion 2 and the rear end side of the armrest 13, and the other connecting rod 15 shown in FIG. 1 has the same configuration.
Further, as shown in FIG. 1, on the outer side of the connecting rod 14 and the connecting rod 15 in the left-right direction, a handle that is entirely operated by a guardian or the like when moving the stroller 1 is substantially U-shaped. Part 16 is arranged.
As shown in FIG. 1, the handle portion 16 is swingably connected to the rear end side of the seat portion 2, and specifically, the support shaft 2 b disposed on the rear end side of the seat portion 2. And swingably connected.

FIG. 5 is a schematic explanatory view showing the swing of the handle portion 16 of FIG. As shown in FIG. 5, the handle portion 16 is configured to be movable rearward (the rear end side of the armrest 12) and forward (the front end side of the armrest 12) with the support shaft 2b of the seat portion 2 as a base point. Yes.
And the handle | steering-wheel part 16 becomes a structure which moves the side of the armrests 12 and 13 through a slight clearance gap at this time.
Specifically, when the guardian places the infant on the seat portion 2 and operates the stroller 1 from behind the infant (pushing on the back), the handle portion 16 is disposed on the rear side as shown by the solid line in FIG. .
On the other hand, when the guardian operates the stroller 1 while looking at the baby's face and the like of the seat portion 2 (face-to-face pressing), the handle portion 16 is disposed on the front side as shown by the broken line in the figure.
At this time, the guardian can change the position of the handle portion 16 from the back pressing to the facing pressing only by swinging the handle portion 16 with the support shaft 2b as a base point, so that the configuration is extremely easy to operate.

FIG. 6A is a schematic diagram showing the configuration of the handle portion 16 and the armrest 12 as seen from the direction of the arrow B in FIG. 1, and FIG. 6B is the inside (armrest 13) side of the handle portion 16. It is the schematic which deleted the armrest.
As described above, the stroller 1 shown in FIG. 6A or the like is configured to be movable to the rear side (the rear end side of the armrest 12, back pressing) and the front side (the front end side of the armrest 12, facing pressing). Yes. For this reason, on the outer side surface of the armrest 12 of the stroller 1, for example, lock pins 12a and 12b, which are positioning protrusions for accurately positioning the handle portion 16 on the rear side and the front side, are formed. Yes. Since the armrest 13 has the same configuration, the armrest 12 will be described below.

FIG. 7 is a schematic view showing the armrest 12 of FIG. As shown in FIG. 7, the armrest 12 is formed so as to protrude from the outer side surface of the armrest 12.
On the other hand, as shown in FIG. 6B, the handle 16 is engaged with the lock pins 12 a and 12 b in FIG. 7 to fix the position of the handle 16 on the inner side (armrest 12, 13 side). For example, two lock pin receiving recesses 16e, which are joint portions, are formed.

Specifically, as shown in FIGS. 6 (a) and 6 (b), the lock pin receiving recess 16e is formed in each of the two movable movable parts 16b and 16c for locking formed in the handle part 16. . The two movable movable portions 16b and 16c for locking are formed on the handle portion 16 so as to be movable along the longitudinal direction (arrow C direction) of the handle portion 16.
The two movable movable parts 16b and 16c are provided with springs or the like and are biased downward in the handle part 16.

  Further, the two lock pins 12a and 12b are disposed at appropriate positions for disposing the handle portion 16 on the rear side or the front side in FIG. Therefore, when the lock pin receiving recess 16e of the handle portion 16 is engaged with the lock pin 12a, the handle portion 16 is disposed on the rear side in FIG. Further, when engaged with the lock pin 12b, it is disposed on the front side.

Further, as shown in FIG. 6B, the lock pin receiving recess 16e has a horizontally long groove shape, and an opening for receiving the lock pins 12b and 12c is formed on the lower side.
For this reason, for example, when the handle portion 16 is arranged on the rear side (pushing back), the movable movable portions 16b and 16c of the handle portion 16 are moved upwardly against the urging force of the spring, In this state, the handle portion 16 is moved to a position corresponding to the lock pin 12a.
Thereafter, the lock movable parts 16b and 16c are lowered downward, and the lock pin receiving recess 16e is engaged with the lock pin 12a, so that the handle part 16 is fixedly disposed at an appropriate position on the rear side. .

  On the other hand, when the handle portion 16 is moved forward (face-to-face pressing), the lock movable portions 16b and 16c are lifted to disengage the lock pin receiving recess 16e from the lock pin 12a. The part 16 is moved in the direction of arrow F in FIG. 5 and moved to a position corresponding to the lock pin 12b. At this position, the lock movable portions 16b and 16c are lowered, and the lock pin receiving recess 16e is engaged with the lock pin 12b, whereby the handle portion 16 is fixedly arranged at an appropriate position on the front side.

  As described above, the lock pin receiving recess 16e, the lock pins 12a and 12b, and the like are examples of the positioning portion.

By the way, as shown in FIG. 2, the lock | rock part 3h for not operating caster structures, such as the rotation, is arrange | positioned at wheel support parts 3c, such as the front wheel part 3. As shown in FIG.
As shown in FIG. 2, for example, an inner wire 17 that is a connecting portion is connected to the lock portion 3 h, and the lock portion 3 h swings by the operation of the inner wire 17. Specifically, the engaging claw 3i of the lock portion 3h is engaged with the rotating body 3f or is in a disengaged state.
As shown in FIG. 1, the inner wire 17 is disposed in the pipe from the front wheel portion 3 to the front leg portion 5, is further disposed in the rear leg portion 9, and is connected to the lock portion 3 h of the rear wheel portion 7. Yes.
That is, when the inner wire 17 moves to the rear wheel portion 7 side, the lock portion 3h of the front wheel portion 3 moves in a direction away from the rotating body 3f, and engages with the engaging claw from the engaging hole 3j of the rotating body 3f in FIG. 3i is separated, and the front wheel portion 3 is configured to be freely rotatable by 360 °, and becomes a caster.

On the other hand, since the rear wheel portion 7 in FIG. 1 has the same configuration as that in FIG. 2, the lock portion 3h in FIG. 2 is swung in the direction close to the rotating body 3f, as shown in FIG. Further, the engaging claw 3i of the lock portion 3h engages with the engaging hole 3j shown in FIG. 3 of the rotating body 3f.
Then, the rotation of the rear wheel portion 8 is hindered, and the moving direction of the stroller 1 is fixed in the front-rear direction. The front wheel part 4, the front leg part 6, the rear leg part 10 and the rear wheel part 8 in FIG.

Therefore, in the present embodiment, when one of the front wheel portions 3 and 4 and the rear wheel portions 7 and 8 is a rotatable caster, the other is always in a fixed state.
Further, by changing the moving direction of the inner wire 17, any one can be easily fixed or easily changed to a caster state.

Further, in the present embodiment, the inner wire 17 is moved in accordance with the swinging of the handle portion 16 shown in FIG. That is, when the handle portion 16 is disposed rearward (rear pushing), the inner wire 17 is disposed on the rear wheel portions 7 and 8 side, and the rear wheel portions 7 and 8 are fixed in rotation. . At that time, the front wheel portions 3 and 4 are turned and function as casters.
Conversely, when the handle portion 16 is moved forward (face-to-face pressing), the inner wire 17 moves to the front wheel portions 3 and 4 side, the front wheel portions 3 and 4 are fixed, and the rear wheel portions 7 and 8 are casters. It becomes.

  Therefore, in this embodiment, the wheel on which the handle portion 16 is arranged is always fixed, and the wheel on the opposite side is a caster. Therefore, the position of the handle portion 16 is either forward or backward (face-to-face push or back push However, it is a stroller 1 that is easy to operate.

Hereinafter, this configuration will be described in detail.
In the present embodiment, as shown in FIGS. 6 and 7, for example, a protrusion 12 c that is a switch portion is formed so as to protrude from the outer side surface of the armrest 12, and the armrest 13 is similarly formed. .
The protruding portion 12 c is configured to be movable toward the inner direction of the armrest 12.

FIG. 8 is a schematic view showing a receiving portion 18 arranged in the middle of the inner wire 17 arranged over the front leg portion 5 and the rear leg portion 9 in FIG. 1, and the receiving portion 18 receives the protruding portion 12c. It is the composition to do.
As shown in FIG. 8, the receiving portion 18 is arranged so as to be connected to the inner wire 17. The receiving portion 18 includes an opening 18a having a substantially rectangular shape in a plan view that can accommodate the protrusion 12c.
Further, the receiving portion 18 has a first spring 19a shown in FIG. 8, and is biased toward the rear wheel portions 7 and 8 of FIG. 1 by the first spring 19a. In the initial state, the rear wheels 7 and 8 are fixed and the front wheels 3 and 4 are casters.

  The second spring 19b in FIG. 8 is a buffer spring for stabilizing the movement of the receiving portion 18 when the receiving portion 18 moves along the arrow D in the longitudinal direction of the inner wire 17.

FIG. 9 is a schematic cross-sectional view showing the relationship between the protrusion 12c and the receiving portion 18 shown in FIG.
The receiving portion 18 in FIG. 8 is disposed in the rear leg portion 9 disposed in the armrest 12 shown in FIG. 6A, and has an opening corresponding to the protruding portion 12 c that moves in the inner direction of the armrest 12. 18a is formed.
Therefore, when the protrusion 12c moves in the inner direction of the armrest 12 (the direction of arrow E in FIG. 9), the tip of the protrusion 12c is inserted into the opening 18a of the receiving portion 18 as shown in FIG. It has become.
As shown in FIG. 9, a protrusion taper part 12ca is formed at the tip of the protrusion part 12c.

An opening taper portion 18aa is also formed in the opening portion 18a of the receiving portion 18 so as to correspond to the protrusion taper portion 12ca.
Therefore, when the protruding portion 12c moves in the direction of arrow E in FIG. 9, the protruding tapered portion 12ca of the protruding portion 12c contacts the opening tapered portion 18aa of the opening 18a of the receiving portion 18, and the protruding portion 12c is further arrowed. Proceeding in the direction E, the protrusion 12c moves the receiving part 18 in the direction of arrow D in FIG.
That is, at this time, the protrusion 12c pushes up the receiving portion 18 in the direction of arrow D against the urging force of the first spring 19a of FIG.

As shown in FIG. 8, the receiving portion 18 is connected to the inner wire 17, and the upper inner wire 17 of the receiving portion 18 is connected to the front wheel portions 3 and 4 in FIG. The movement of the part 18 is a movement for moving the inner wire 17 to the front wheel part side (arrow D direction) in FIG.
Accordingly, when the protrusion 12c moves in the direction of arrow E in FIG. 9, it is initially biased toward the rear wheels 7, 8 by the first spring 19a, and the rotating body 3f of the rear wheels 7, 8 is The lock portion 3h engaged with the engagement hole 3j is brought into a non-engagement state, and the lock portions 3h of the front wheel portions 3 and 4 are engaged with the engagement hole 3j.

Next, the relationship between the movement of the protrusion 12c and the swing of the handle portion 16 will be described.
First, as shown in FIG. 5, the handle portion 16 is pulled up from the rear position (rear pushing) on the rear leg portion 9 side, and the lock movable portions 16b and 16c are lifted upward to engage the lock pin 12b and the lock pin receiving recess 16e. When the handle portion 16 is swung forward and the movable movable portions 16b and 16c are lowered at the position of the lock pin 12a with the joints removed, the lock pin receiving recess 16e of the handle portion 16 and the armrest 12 etc. The lock pin 12b is engaged, and the handle portion 16 is disposed at an appropriate front position (face-to-face pressing).

  At this time, as shown in FIG. 6 (a), a front contact portion 16f formed on the front side of the lock movable portion 16d of the handle portion 16 is formed to protrude outward from the armrest 12. By contacting 12d, the handle portion 16 is positioned with higher accuracy.

Further, when the handle portion 16 is disposed on the front side (face-to-face pressing) and the lock pin receiving recess 16e of the lock movable portion 16b is engaged with the lock pin 12b, the arm rest 12 side (inside) of the lock movable portion 16b is engaged. However, the protrusion 12c shown in FIGS. 6A and 7 is pushed inward of the armrest 12, that is, in the direction of arrow E in FIG.
Then, the protrusion 12c moves in the direction of arrow E in FIG. 9, and the receiving portion 18 moves in the direction of arrow D as described above. Thereby, the inner wire 17 moves to the front wheel portions 3 and 4 side and fixes the front wheel portion 3 and the like. At this time, the rear wheel portion 7 and the like are released from the fixed state and become a rotatable caster.

  In the present embodiment, the protruding portion 12c, the receiving portion 18, the inner wire 17 and the like are examples of the changing portion.

Further, in the present embodiment, as shown in FIG. 6B, the portion that contacts the projection 12c of the armrests 12 and 13 inside the movable movable portions 16b and 16c is a contact holding portion. A contact maintaining portion 16g which is a concave portion is formed.
Therefore, when the movable movable parts 16b and 16c are brought into contact with the protruding part 12c and the protruding part 12c is pushed in the direction of arrow E in FIG. 9 (inward direction of the armrest 12 etc.), the protruding part 12c can be pushed in with high accuracy. .

In the present embodiment, since the above-described configuration is adopted, a guardian or the like who operates the stroller 1 is in a state where the handle portion 16 in FIG. ), The inner wire 17 is moved to the rear wheel portions 7 and 8 side by the biasing force of the first spring 19a of the receiving portion 18, and the rear wheel portions 7 and 8 are fixed. The
At this time, since the handle portion 16 is not in contact with the protruding portion 12c shown in FIG. 6A and the like, the protruding portion 12c does not operate at all.

On the other hand, the front wheels 3 and 4 are locked by the inner wire 17 and the lock portion 3h is pulled, and as shown in FIG. 2, the front wheels 3 and 4 are not fixed, and function as casters that can move freely. To do.
As described above, the operation of the stroller 1 is easy to operate.

Thereafter, when the guardian or the like wants to move the stroller 1 while looking at the infant's face or the like riding on the seat portion 2 (face-to-face pressing), the lockable movable members disposed on both sides of the handle portion 16 in FIG. The parts 16b and 16c are moved upward against the urging force of a spring or the like to release the engagement with the lock pin 16e such as the armrest 12, and the handle part 16 is moved forward as shown in FIG. The lock pin receiving recess 16e of the lock movable parts 16b and 16c and the lock pin 12b such as the armrest 12 are engaged.
At this time, the abutment maintaining portion 16g of the movable movable portion 16c pushes the projection 12c such as the armrest 12, and the projection taper 12ca of the projection 12c abuts against the opening taper 18aa. Move in the direction of arrow D.
Thereby, the receiving part 18 moves against the urging force of the first spring 19a of the receiving part 18, and the inner wire 17 is moved to the front wheel parts 3 and 4 side.

Thereby, the lock | rock part 3h of the rear-wheel parts 7 and 8 will be in the non-engagement state of FIG. 2, and functions as a caster. On the other hand, the lock portions 3h of the front wheel portions 3 and 4 are fixed in the engaged state shown in FIG.
Accordingly, when the handle portion 16 is tilted forward (face-to-face pressing) and the stroller 1 is moved rearward, the front rear wheels 7 and 8 in the moving direction become casters, and the rear front wheel in the moving direction. Since 3 and 4 are fixed, the operator of the stroller 1 can easily operate.

  Thus, in the present embodiment, when the handle portion 16 is disposed on the front side, the rotation of the front wheel portions 3 and 4 on the front side of the handle portion 16 is automatically fixed, while the rear wheel portion is 7 and 8 are released, and the caster can be turned. Therefore, the stroller 1 is extremely easy to use.

In addition, the front wheels 3 and 4 and the rear wheels 7 and 8 are changed to fixed or non-fixed (casters) based on the arrangement of the handle 16 so that the projection 12c, the receiving portion 18 and the inner wire 17 are operated. Is executed from. Further, the structures of the receiving portion 18 and the inner wire 17 are arranged inside the front leg portions 5 and 6 and the rear leg portions 9 and 10, and the protruding portion 12c protrudes from the armrest 12 and the like. Is moving inward of the armrest 12 and the like.
Therefore, these changing mechanisms are not an external slide operation or the like, and the exposure of the protrusion 12c is extremely small. For this reason, it is possible to prevent malfunctions caused by exposure to the outside, and to reduce the possibility of accidental touching and injury of the infant riding on the seat portion 2. A stroller that is safe for passengers.
Further, in the present embodiment, the inner wire 17 is simply extended to the rear wheel parts 7 and 8 through the front wheel parts 3 and 4, the front leg parts 5 and 6, and the rear leg parts 9 and 10 in this order. Only a minimum length of wire is required. Therefore, unlike the conventional example, it is not necessary to use an extra wire until the member slides, and the wire can be shortened.

In the present embodiment, the receiving portion 18 is configured to be provided on the rear leg portion 9. However, the present invention is not limited to this, and if the receiving portion 18 is provided corresponding to the position of the protruding portion 12 c. I do not care. For example, when the front leg portion 5 is attached to the front end side of the armrest 12 and the rear leg portion 9 is attached to the rear end side of the armrest 12, the receiving portion 18 is not in the front leg portion 5 or the rear leg portion 9 but in the armrest 12. It is good also as a structure provided inside.
With this configuration, the design of the front legs, the rear legs, etc. is free, and the receiving portion 18 is not necessarily provided with a hole in the pipe, and there is an advantage that the stroller can be easily assembled. .

(Second Embodiment)
FIG. 10 is a schematic view showing a main part of the stroller 100 according to the second embodiment of the present invention.
Most of the configuration of the stroller 100 according to the present embodiment is the same as that of the stroller 1 according to the first embodiment described above.
As shown in FIG. 10, the stroller 100 includes a movable movable portion 160 b that can move in the longitudinal direction of the handle portion 160 (in the direction of arrow H in FIG. 10), and the like, and the outer side from the surface of the handle portion 160 ( For example, it has a protrusion 160h which is a switch part movable in the armrest 120 or the like direction.

On the other hand, as shown in FIG. 10, in the vicinity of the lock pin 120b of the armrest 120 for disposing the handle portion 160 forward (face-to-face pressing), an armrest opening for inserting the protruding portion 160h of the handle portion 160 120h is formed.
An opening portion 18a of the receiving portion 18 in FIG. 8 is disposed on the rear leg portion 90 disposed in the armrest 120 corresponding to the armrest opening 120.
For this reason, when the handle portion 160 is positioned by engaging with the lock pin 120b on the front side, at the same time, the protrusion portion 160h of the handle portion 160 is inserted into the opening portion 18a of FIG. As in the embodiment, the receiving portion 18 moves in the direction of arrow D, the rotation of the front wheel portions 3 and 4 is fixed, and the rear wheel portions 7 and 8 are configured to be rotatable casters.

As described above, also in this embodiment, when the handle portion 160 is moved forward, the front wheel portion 3 and the like are automatically fixed from the caster, and the rear wheel portion 7 and the like are changed from the fixed state to the caster. It becomes a stroller that is easy to operate for a guardian or the like.
Further, in the present embodiment, since there are no protrusions on the surface of the armrest 120 or the like, a situation in which an infant riding on the seat portion 2 accidentally touches does not occur, and the structure is safe.

FIG. 11 is a schematic cross-sectional view taken along the line GG of FIG. As shown in FIG. 11, the protrusion 160h is urged in a direction to be pulled into the handle portion 160 by a spring or the like.
In addition, a proximal end side taper portion 160 i is formed at the proximal end portion of the protrusion 160.
On the other hand, the movable movable portion 160b and the like disposed above the projection portion 160h are formed such that the movable projection portion 160j projects toward the lower side (projection portion 160h side).

The movable protrusion 160j is formed with a movable protrusion taper 160k as shown in FIG. Therefore, when the lock movable portion 160b or the like is lowered, that is, when the lock movable portion 160b or the like is engaged with the lock pin 120b or the like of the armrest 120, the protrusion 160h is pushed by the movable protrusion taper portion 160k. Protruding.
Therefore, the protruding protrusion 160h is inserted into the armrest opening 120h in FIG. 10, and the fixed state of the front wheel portion 3 and the like and the rear wheel portion 7 and the like is switched.

  On the other hand, when the lock movable portion 160b is lifted, that is, the engagement between the handle portion 160 and the lock pin 120b such as the armrest 120 is released, the handle portion 160 is moved from the rear side to the front side, for example, as shown in FIG. 11, the base end side of the protrusion 160 h in FIG. 11 is released from contact with the movable protrusion taper 160 k of the movable movable portion 160 h and moved into the handle portion 160 by the force of the spring. Thus, the protrusion 160h does not protrude from the handle 160.

  Therefore, even when the user moves the handle portion 160, the projection portion 160h does not contact the armrest 120 or the like, and the smooth handle portion 160 can be secured.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims.

  DESCRIPTION OF SYMBOLS 1,100 ... Stroller, 2 ... Seat part, 2a ... Seat adjustment part, 2b ... Support shaft 3, 4, ... Front wheel part, 3a, 3b, 4a, 4b ... Wheel 3c, 4c ... wheel support part, 3d ... wheel shaft arrangement part, 3e ... wheel support part body, 3f ... rotating body, 3g ... front wheel mounting part, 3h ... lock part 3i ... engaging claws 5, 6, 50 ... front leg, 7, 8 ... rear wheel, 9, 10, 90 ... rear leg, 11 ... footrest, 12, 13, 120... Armrest, 12 a, 12 b, 120 b... Lock pin, 12 c, 160 h... Projection, 12 ca .. projection taper, 12 d. ..Connecting rod, 16, 160 ... handle portion, 16b, 16c, 160b ... movable portion for locking, 16e Lock pin receiving recess, 16g ... contact maintaining portion, 16f ... front contact portion, 17 ... inner wire, 18 ... receiving portion, 18a ... opening, 18aa ... opening taper Part, 19a ... first spring, 19b ... second spring, 120h ... armrest opening, 160i ... proximal end taper part, 160j ... movable protrusion, 160k ... movable Projection taper

Claims (4)

A riding section for placing passengers;
An armrest disposed on a side of the rider of the rider;
A front wheel portion disposed on the front side of the passenger;
A rear wheel portion disposed on the rear side of the passenger;
A front leg part and a rear leg part for supporting the front wheel part and the rear wheel part, respectively;
A handle portion that can be selectively disposed on the front side or the rear side and is operated by an operator;
The front wheel portion and the rear wheel portion include a caster portion that can freely change the moving direction, and a fixing portion that fixes the moving direction,
A change part for operating or non-operating the fixed part of the front wheel part and the rear wheel part,
The changing unit has a switch unit that moves inward from the surface of the armrest unit,
A stroller characterized in that the moving direction of one of the fixing portions of the front wheel portion or the rear wheel portion is fixed based on the movement of the switch portion. A positioning part for determining an arrangement position of the handle part is formed on the armrest part,
The stroller according to claim 1, wherein when the handle portion is positioned by the positioning portion, the switch portion moves in an inner direction of the armrest.   The switch part is arranged so that a part of the switch part protrudes from the surface of the armrest part, and is configured to move by contacting the handle part. 2. The stroller according to 2. The switch part is arranged on the surface of the handle part so that a part thereof protrudes,
The positioning portion becomes a protruding positioning projection, and the handle portion is formed with an engaged portion to be engaged with the positioning projection,
When the engaged part is engaged with the positioning protrusion, the part of the switch part protrudes from the handle part and moves to be inserted into the armrest part. The stroller according to claim 1 or 2, wherein the stroller is characterized.

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