JP2019014377A - Baby carriage - Google Patents

Abstract

To provide a baby carriage which prevents removal of a seat from a baby carriage body, to which the seat is detachably attached, in a state where an infant is placed on the seat.SOLUTION: A baby carriage 10 of the invention includes: a seat on which an infant is placed; a baby carriage body 20 supporting the seat; and an attachment part 60 and a release part 70 which detachably attach the seat to the baby carriage body 20. The baby carriage 10 includes: detecting means 80 which detects whether or not the infant is placed on the seat; and a release prevention part 90 which is connected to the detecting means 80 and prevents removal of the seat attached to the baby carriage body 20 on the basis of a signal from the detecting means 80 which detects the existence of the infant.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stroller for carrying an infant, and more particularly to a stroller provided with a mounting portion and a release portion that allow a seat for placing an infant to be attached to and detached from a stroller body.

  2. Description of the Related Art Conventionally, baby strollers that move while sitting or sleeping on an infant are widely used. The seats on which infants ride are mainly infant beds and infant chairs. There is a stroller in which the bed and chair can be attached to and detached from the stroller body, and the bed and chair can be used for a long time by exchanging the seats according to the growth of the infant.

  The stroller disclosed in Patent Document 1 adopts a configuration in which a seat that functions as a seat or a bed for an infant can be attached to and detached from the vehicle body. This specific structure is automatically fixed by a locking mechanism when a pair of fixing rods attached to the seat is inserted into the holding hole of the arm member. On the other hand, when the seat is removed, the engagement between the rod and the holding hole is released by operating the release switch of the handle support member, so that the seat can be removed (see paragraph number 0161).

Japanese Patent No. 5442729

In recent years, serious accidents involving infants related to strollers have become a problem. In the structure of a stroller in which a conventional seat can be attached and detached, the seat can be removed from the stroller body even when the baby is placed on the seat. For this reason, when trying to remove the seat on which the infant is placed, the behavior of the infant is distracted and there is a risk that it may become unstable.
In addition, the release switch may be accidentally operated while the infant is placed on the seat, and the seat may fall off the stroller body due to some impact.

  Therefore, in view of the above-described problems of the prior art, an object of the present invention is to provide a stroller that prevents the removal of a seat in a state where an infant is placed from a stroller body to which the seat can be attached and detached.

As a first means for solving the above-described problems, the present invention includes a seat on which an infant is placed, a stroller body that supports the seat, a mounting portion that can be attached to and detached from the stroller body, and a release portion. In the stroller,
Detecting means for detecting the presence or absence of the infant on the sheet;
A stroller comprising a release prevention unit that is connected to the detection unit and prevents the seat mounted on the stroller body from being removed based on a signal that detects the presence of the infant by the detection unit. There is to do.
According to the first means, it is possible to prevent the seat from being removed from the stroller body with the infant on the seat. For this reason, it is possible to prevent serious accidents such as an accidental fall of an infant from a stroller, thereby improving safety during use.

As a second means for solving the above-mentioned problem, in the first means, the release preventing portion is provided in the stroller body based on a signal for detecting the absence of the infant by the detecting means. The stroller according to claim 1, wherein the mounted seat can be removed.
According to the second means, when an infant is not on the seat, the seat can be removed from the stroller body by the release portion by switching the release prevention state. Therefore, the convenience of the stroller is good and the safety can be improved.

As a third means for solving the above-mentioned problems, the present invention is the first or second means, wherein the mounting portion is provided on a rod of an armrest of the stroller body,
The release portion is provided on a support member of the sheet that fits the rod,
An object of the present invention is to provide a stroller characterized in that the release preventing portion prevents or enables removal of the rod fitted to the support member.
According to the said 3rd means, it can prevent reliably removing a sheet | seat from a baby stroller main body in the state which put the infant in the connection location of a sheet | seat and a baby stroller main body.

As a fourth means for solving the above-mentioned problems, the present invention provides the base plate according to the third means, wherein the detection means is disposed on the bottom surface of the sheet and a partial gap is provided between the bottom surface and the bottom surface. And
The release prevention unit is
A lock hole provided in the rod; and a lock release preventing member that can be fitted or released with the lock hole;
A cable body having one end connected to both side surfaces of the base plate;
A link member that is connected to the other end of the cable body and is in contact with the unlocking prevention member to move forward and backward toward the lock hole;
An elastic body that forms a gap between the base plate and the bottom surface of the sheet by biasing one end to the support member and the other end to the link member and pulling up the cable body;
It is to provide a baby stroller characterized by comprising:
According to the 4th means of the above-mentioned composition, it is possible to detect the infant on the seat semi-permanently without using the power source and to remove the seat while the infant is on the stroller body.

As a fifth means for solving the above-mentioned problem, the present invention is the third means, wherein the detection means is any one of a pressure sensor, an infrared sensor, and a temperature sensor,
The release prevention unit is
A lock hole provided in the rod; and a lock release preventing member that can be engaged with or released from the lock hole;
It is another object of the present invention to provide a stroller comprising a drive unit that moves the release preventing member forward and backward.
According to the fifth means of the above configuration, the detection means attached in the seat can be downsized to ensure a large accommodation space, and there is no possibility of touching the infant and causing discomfort.
In addition, it is possible to detect an infant on the seat and prevent the seat from being removed while the infant is on the stroller body.

As a sixth means for solving the above-mentioned problems, the present invention is the first or second means, wherein the mounting portion is provided on a rod of an armrest of the stroller body, and advances and retreats from the outer periphery of the side surface of the rod. It has a convex part that moves,
The release portion is provided in the insertion hole of the support member of the sheet, and when the convex portion provided on the bottom surface side of the insertion hole is fitted, and when the convex portion is fitted to the enlarged diameter portion, An opening that is opposed to the convex portion and opened in the diameter direction of the rod; and a pair of release buttons that are biased to the outside from the opening,
The detection means is a base plate that is disposed in a seat portion of the seat and has a gap between the seat portion and the seat portion,
The release prevention unit is
A long hole through which the rod passes, a protrusion that is disposed between the release button and the rod to prevent the release portion from being released, and an unlocking prevention member that can move forward and backward toward the rod;
A cable body having one end connected to both side surfaces of the base plate;
A link member that connects to the other end of the cable body and contacts the unlocking prevention member to move the unlocking prevention member forward and backward toward the rod;
An elastic body that fixes one end to the support member, fixes the other end to the link member, and urges the cable body in the direction of pulling up to form a gap between the base plate and the bottom surface of the sheet;
It is to provide a baby stroller characterized by comprising:
According to the sixth means, the infant on the seat can be detected semi-permanently without using a power source, and the seat can be prevented from being removed while the infant is on the stroller body.

As a seventh means for solving the above problem, in any one of the first to sixth means, the sheet is any one of an infant bed, an infant chair, and a pet bed. It is to provide a stroller.
According to the seventh means configured as described above, either an infant bed or an infant chair serving as a seat can be selected in accordance with the growth of the infant, and if a pet bed is selected, one pet cart can be selected. Can be used safely in a stroller for a long time.

As an eighth means for solving the above-mentioned problems, the present invention provides the seventh means, wherein the seat is the baby bed,
The stroller body provides a stroller characterized in that the infant chair is attached below the seat.
According to the eighth means, either an infant bed or an infant chair serving as a seat can be selected in accordance with the growth of the infant, and it can be safely used for a long time with one stroller.

  According to the stroller of the present invention, it is possible to prevent the seat from being removed from the stroller body while an infant is placed on the seat, and safety when using the stroller can be improved.

It is explanatory drawing of a cancellation | release prevention part. It is explanatory drawing of a lock release prevention member. It is explanatory drawing of a lock hole. It is explanatory drawing of a detection means. It is explanatory drawing of the baby stroller which installs an infant bed. It is explanatory drawing of a mounting part and a cancellation | release part. It is explanatory drawing of the stroller provided with the infant chair. It is explanatory drawing of the stroller provided with the infant bed and the infant chair. It is explanatory drawing of the modification 1 of a stroller. It is explanatory drawing of the modification 2 of a stroller.

  Embodiments of the stroller of the present invention will be described below in detail with reference to the accompanying drawings.

[Stroller 10]
FIG. 5 is an explanatory view of a stroller on which an infant bed is mounted. FIG. 6 is an explanatory diagram of the mounting portion and the release portion. The stroller 10 of the present invention includes a seat on which an infant is placed, a stroller body 20 that supports the seat, a mounting portion 60 that attaches the seat to the stroller body 20, a release portion 70 that removes the seat, and the presence or absence of an infant on the seat. Detecting means 80 (see FIG. 4) for connecting to the detecting means 80, and a release preventing unit 90 for preventing the removal of the seat attached to the baby stroller body 20 based on a signal for detecting the presence of the infant by the detecting means 80. 1) is the main basic configuration. The baby bed 50 or / and the infant chair 40 can be used as the seat.
The front, rear, left, and right in the present embodiment are the same as the front, rear, left, and right with respect to the user when the stroller handle is brought close to the chest.

[Stroller body 20]
The stroller body 20 includes a front leg 22, a rear leg 24, and an armrest 26, each paired on the left and right, and further includes a handle 28.
The front leg 22 includes a front wheel 22a at the lower end, and is curvedly connected toward the rear leg 24 with its upper end being pivotally connected near the upper end of the rear leg 24.
The rear leg 24 includes a rear wheel 24a at the lower end, and the upper end is rotatably connected to the armrest 26.

The armrest 26 is a member that covers the upper ends of the front legs 22 and the rear legs 24 and whose rear ends are rotatably connected to the handle 28. The upper surface side of the armrest 26 is formed in a gently curved shape, and a rod 261 is provided above the location where the rear leg 24 is connected. The rod 261 is fitted into an insertion hole 541 of a sheet support member 54 described later.
The handle 28 includes a pair of straight portions 28a and an intermediate portion 28b connecting the straight portions 28a, and is formed in a substantially U shape. The handle 28 has a middle portion 28b at the upper end that is bent rearward in a side view.

[Infant bed 50]
The infant bed 50 serving as a seat includes a frame 51, a fabric 53, a support member 54, and a seat (bottom surface) 56, and mainly functions as an infant bed (see FIG. 4). An insertion hole 541 into which the rod 261 of the armrest 26 can be inserted is provided on the bottom surface of the support member 54 (see FIG. 6).

[Mounting part 60]
The mounting portion 60 is attached to the outer periphery of a cylindrical rod 261 that protrudes upward from the upper surfaces of the pair of armrests 26. The mounting portion 60 includes a hole 262 penetrating in the horizontal direction (diameter direction) on the upper end side of the rod 261, a pair of convex portions 62 extending from the hollow interior of the rod 261 to the outside via the two holes 262, and the rod 261. The U-shaped leaf spring 64 provided in the hollow interior is the main basic configuration.

  The U-shaped plate spring 64 includes a curved portion and a pair of straight portions, and the opposing straight portions are urged away from each other by the curved portion therebetween. The both ends of the straight line portion are connected to the hollow end portions of the pair of convex portions 62, respectively. On the bottom surface side of the insertion hole 541 on the bottom surface of the pair of support members 54 of the baby bed 50, a diameter-expanded portion 72 of the release portion 70 described later is formed. The enlarged diameter portion 72 is larger than the diameter of the insertion hole 541, and is provided at a position facing the convex portion 62 after the rod 261 is inserted into the insertion hole 541. In the mounting portion 60 having such a configuration, the convex portion 62 is urged by the U-shaped plate spring 64 so as to protrude from the hole 262 to the outside. When the diameter part 72 is reached, the U-shaped plate spring 64 is opened, and the convex part 62 is fitted and fixed to the enlarged diameter part 72. Thereby, the baby bed 50 can be mounted on the stroller body 20 (see FIG. 6A).

[Release unit 70]
The release portion 70 is provided at the lower end of the pair of support members 54 of the sheet. The release portion 70 is a diameter-expanding portion 72 formed on the bottom surface side of the insertion hole 541 of the pair of support members 54 of the sheet, and a portion facing the convex portion 62 when the convex portion 62 is fitted to the large-diameter portion 72. Thus, an opening 74 opened in the diametrical direction and a pair of release buttons 76 urged to the outside from the opening 74 have a main basic configuration.

  When the release portion 70 having such a configuration is in the mounted state in which the rod 261 is inserted into the insertion hole 541, the convex portion 62 on the same plane is disposed inside the release button 76. When the release button 76 is pushed toward the center of the enlarged diameter portion 72, it hits the convex portion 62 of the mounting portion 60, and when further pushed, the convex portion 62 is also pushed to the center side. By pulling out the insertion hole 541 from the rod 261 in this state, the baby bed 50 can be removed (released) from the stroller body 20 (see FIG. 6B).

[Detecting means 80]
FIG. 4 is an explanatory view of the detection means, (1) is a perspective view, (2) is a side view when the infant is not on (not present), and (3) is when the infant is on (present). FIG. The detection means 80 shown in FIG. 4 is a base plate 82 disposed on the seat portion 56 of the baby bed 50. The base plate 82 is divided into a plurality of parts (the base plate 82 shown in FIG. 4 is divided into three parts) and connected to each other so as to be foldable. Then, one end of a strip 94 of a release preventing portion 90 (described later) such as a belt or a wire is connected to the fold of the base plate 82 closest to the pair of support members 54.

[Release prevention unit 90]
FIG. 1 is an explanatory view of a release prevention unit, (1) is a cross-sectional view before release prevention (when an infant is not on the seat), (2) is a view taken along the line AA in (1), 3) is a cross-sectional view when release is prevented (when an infant is on the seat), and (4) is a view taken along the line BB of (3). FIG. 2 is an explanatory view of the lock release preventing member. FIG. 3 is an explanatory view of the lock hole.
The release prevention unit 90 includes a lock hole 91, a lock release prevention member 92, a cable body 94, a link member 96, and an elastic body 98.
The lock hole 91 is provided in the rod 261 of the armrest 26. A more specific configuration of the lock hole 91 is a long hole extending in the horizontal direction provided on the outer peripheral surface on the same plane as the convex portion 62 arranged on a straight line. The lock hole 91 is fitted with an engagement piece 922 of an unlocking prevention member 92 described later, and when the lock hole 91 is fitted, the rod 261 is prevented from being pulled out from the insertion hole 541.
The lock release preventing member 92 includes a through hole 921 through which the rod 261 passes, an engagement piece 922 that extends from a part of the through hole 921 toward the center, and can be fitted into the lock hole 91, and a link member 96 described later. The slider 923 is slidably fitted in the outer groove 962.

The cable body 94 has one end connected to the side portion of the base plate 82 and the other end connected to a link member 96 attached to the inside of the support member 54. The rope 94 can be a belt, string, wire or the like having a predetermined rigidity.
The link member 96 is in contact with the lock release preventing member 92 inside the support member 54 and is movable in the vertical direction, and is urged from below to above by an elastic body 98 to be described later. The link member 96 is provided with a tapered portion 961 whose diameter increases from the lower part (reduced diameter) to the upper part (expanded diameter) in the middle part. The tapered portion 961 is formed with the above-described outer groove 962 on the outer side, and the slider 923 of the lock release preventing member 92 slides. When the link member 96 moves up and down, the tapered portion 961 is inclined (the outer groove 962 is inclined). ), The lock release preventing member 92 moves forward and backward toward the rod 261.
The elastic body 98 is a member having predetermined elasticity, and a coil spring is used in this embodiment. The elastic body 98 has one end connected to the support member 54 and the other end connected to the link member 96, and urges (lifts) the link member 96 in the support member 54 upward. The base plate 82 is lifted upward by the elastic body 98 so that a gap is formed between the base plate 82 and the seat portion 56 of the baby bed 50.

[Infant chair 40]
FIG. 7 is an explanatory view of a stroller provided with an infant chair. (1) is a perspective view of the infant chair, and (2) is an overall perspective view. A seat that can be attached to and detached from the stroller body 20 of the stroller 10 </ b> A shown in FIG. 7 is an infant chair 40. The infant chair 40 includes a frame 42, a seat portion 44, and a back portion 46, has a predetermined strength and flexibility, and mainly functions as an infant seat portion. A pair of support members 54 are attached to an intermediate portion of the frame 42. The support member 54 has the same structure as that shown in FIGS. A base plate 82 of the detection means 80 is attached on the seat portion 44.
The infant chair 40 having such a configuration is configured to be attachable to and detachable from the stroller body 20 via the mounting portion 60 and the release portion 70, similarly to the baby bed 50.

[Stroller with baby bed and infant chair]
FIG. 8 is an explanatory view of a stroller provided with an infant bed and an infant chair. The baby stroller 10B shown in FIG. 8 has a configuration in which an infant chair 40 is attached to the baby stroller body 20, and the baby bed 50 is detachable.
In addition, the back part of the infant chair 40 is provided with a rotating part at a connection position with the baby stroller body 20 and can be adjusted to an arbitrary angle. After the baby bed 50 is removed, a seat part (not shown) can be attached to the baby stroller body 20. The configuration is adopted.
The baby stroller 10B having such a configuration can select either the baby bed 50 or the baby chair 40 as a seat in accordance with the growth of the baby, and can be safely used for a long time with one baby stroller 10B. .

[Action]
The operation of the stroller of the present invention having the above configuration will be described below.
(When the infant is not on the seat)
Since the base plate 82 is biased in a direction away from the seat portion 56 (44) by the elastic body 98 of the release preventing portion 90, the base plate 82 serving as the detection means 80 and the seat portion 56 (44) are interposed. A gap is formed. When the infant is not on the seat (absent), the gap is maintained. The engagement piece 922 of the release preventing portion 90 is not fitted in the lock hole 91. For this reason, the removal operation of the sheet by the release unit 70 can be performed.
(When an infant is on the seat)
When an infant rides on the base plate 82 serving as the detection means 80, the gap between the base plate 82 and the seat 56 (44) disappears, and the cord 94 connected to the base plate 82 is in the biasing direction of the elastic body 98. Pulled in the opposite direction. The link member 96 connected to the cable body 94 moves downward, the slider 923 moves from the reduced diameter of the tapered portion 961 to the enlarged diameter, and the unlocking prevention member 92 advances toward the lock hole 91 and engages. The pieces 922 are fitted together. As a result, the rod 261 cannot be pulled out from the insertion hole 541 of the support member 54, and the removal operation of the sheet by the release portion 70 can be prevented.
The stroller of the present invention can be used as a pet cart by applying a pet bed instead of an infant bed as a seat detachable from the stroller body. The pet bed has a detachable structure similar to that of the baby bed. By using the same support member and detection means as the baby bed, it is possible to prevent the seat from being removed from the stroller body while the pet is placed on the seat. Therefore, safety when using a pet stroller or pet cart can be improved.

[Modification 1] Electric Detection Means FIG. 9 is an explanatory view of a first modification of the stroller. (1) is an explanatory view of the detection means, and (2) is an explanatory view of the release preventing portion. The detection means 80A of the first modification employs a sensor capable of detecting an infant on the seat.
The specific detection means 80A is configured by any one of a pressure sensor that can detect the weight of an infant, an infrared sensor that can detect the infant, a temperature sensor that can detect the body temperature of the infant, or a combination of two or more. is there. The sensor is installed in the seat so that the presence or absence of the infant (on board or not on board) can be confirmed.
The release prevention unit 90A includes a lock release prevention member 92A and a drive unit 99. The lock release preventing member 92 </ b> A is a member whose main surface is disposed horizontally and moves forward and backward toward the lock hole 91 of the rod 261 so that the tip fits into the hole.
The drive unit 99 is electrically connected to a sensor serving as the detection unit 80A through a wireless or wired connection. The drive unit 99 controls the forward / backward movement of the unlocking prevention member 92A based on the measurement value of the detection means 80A. Specifically, when the detection unit 80A receives the detection signal of the presence of an infant, the driving unit 99 extends and engages the lock release preventing member 92A toward the lock hole 91. This prevents the rod 261 from being pulled out from the insertion hole 541.
On the other hand, when the detection means 80A detects the absence of an infant, the lock release preventing member 92A is retracted from the lock hole 91 to release the fitting. Thereby, the rod 261 can be pulled out from the insertion hole 541 by the release portion 70.

According to the stroller of the first modified example, the detection means attached in the seat can be downsized to secure a large accommodation space, and there is no possibility of touching the infant and causing discomfort.
In addition, it is possible to detect an infant on the seat and prevent the seat from being removed while the infant is on the stroller body.

[Modification 2] Release prevention part between mounting part and release part FIG. 10 is an explanatory view of Modification 2 of the stroller, (1) is a perspective view of the lock release prevention member, and (2) is a release prevention operation. It is explanatory drawing. The release preventing unit 90B of the second modification employs a configuration that prevents the removal of the sheet by the release unit.
A specific configuration of the release preventing portion 90B includes a long hole 924 through which the rod 261 passes, and a protrusion 925 that is disposed between the release button 76 and the rod 261 to prevent the release portion 70 from being released. A lock release prevention member 92B that can move forward and backward, a cable body 94 having one end connected to both side surfaces of the base plate 82 (hereinafter the same as the configuration of FIG. 1), and the other end of the cable body 94 connected A link member 96 that contacts the lock release prevention member 92B and moves the lock release prevention member 92B forward and backward toward the rod 261, and one end is fixed to the support member 54 and the other end is fixed to the link member 96. It consists of an elastic body 98 that urges the body 94 in the pulling direction to form a gap between the base plate 82 and the bottom surface of the sheet.

Since the protrusion 925 is not disposed between the rod 261 and the release button 76 when the baby is not in the vehicle (not present), the release prevention unit 90B having such a configuration removes the seat from the stroller body 20 from the stroller body 20. Removal operation is possible.
On the other hand, when the baby is on (present), the protrusion 925 is disposed between the rod 261 and the release button 76 by the advancement operation of the lock release prevention member 92B. For this reason, operation which removes the sheet | seat from the stroller main body 20 by the cancellation | release part 70 is blocked | prevented.
According to the stroller of Modification 2 as described above, it is possible to detect the infant on the seat semi-permanently without using the power source, and to remove the seat while the infant is on the stroller body.

  The present invention has industrial applicability particularly in the field of vehicles such as strollers for infants.

10, 10A, 10B ... Stroller,
20 .... Stroller body, 22 .... Front leg, 22a .... Front wheel, 24 ... ... Rear leg, 24a ... ... Rear wheel, 26 ... ... Armrest, 261 ... ... Rod, 28 ... ... Handle , 28a ......... Linear part, 28b ......... Intermediate part,
40 ……… infant chair, 42 ……… frame, 44 ……… seat, 46 ……… back,
50 ......... Infant bed, 51 ......... Frame, 53 ......... Dough, 54 ......... Support member, 541 ......... Insertion hole, 56 ......... Seat,
60 ......... Mounting part, 62 ......... Convex part, 64 ......... U-shaped leaf spring,
70 ......... Release part, 72 ......... Expanded diameter part, 74 ......... Opening, 76 ......... Release button,
80, 80A ......... detection means, 82 ......... base plate,
90, 90A, 90B ......... Release prevention part, 91 ......... Lock hole, 92, 92A, 92B ...... Lock release prevention member, 921 ......... Through hole, 922 ......... Engagement piece, 923 ... ... Slider, 924 ... ... Slot, 925 ... ... Projection part, 94 ... ... Rib body, 96 ... ... Link member, 961 ... ... Tapered part, 962 ... ... Outer groove, 98 ... ... Elastic body, 981... Engagement piece.

Claims (8)

In a stroller comprising a seat for carrying an infant, a stroller body that supports the seat, and a mounting portion and a release portion that are detachable from the stroller body,
Detecting means for detecting the presence or absence of the infant on the sheet;
A stroller comprising a release prevention unit that is connected to the detection unit and prevents the seat mounted on the stroller body from being removed based on a signal that detects the presence of the infant by the detection unit.   2. The stroller according to claim 1, wherein the release prevention unit enables removal of the seat mounted on the stroller body based on a signal for detecting the absence of the infant by the detection unit. The mounting portion is provided on a rod of an armrest of the stroller body,
The release portion is provided on a support member of the sheet that fits the rod,
The stroller according to claim 1 or 2, wherein the release preventing portion prevents or enables removal of the rod fitted to the support member. The detection means is a base plate that is disposed in a seat portion of the seat and has a gap between the seat portion and the seat portion,
The release prevention unit is
A lock hole provided in the rod; and a lock release preventing member that can be fitted or released with the lock hole;
A cable body having one end connected to both side surfaces of the base plate;
A link member that is connected to the other end of the cable body and contacts the unlocking prevention member to move the unlocking prevention member forward and backward toward the lock hole;
An elastic body that fixes one end to the support member, fixes the other end to the link member, and urges the cable body in the direction of pulling up to form a gap between the base plate and the bottom surface of the sheet;
The stroller according to claim 3, further comprising: The detection means is any one of a pressure sensor, an infrared sensor, and a temperature sensor,
The release prevention unit is
A lock hole provided in the rod; and a lock release preventing member that can be engaged with or released from the lock hole;
The stroller according to claim 3, further comprising a drive unit that moves the lock release prevention member forward and backward. The mounting portion is provided on the rod of the armrest of the stroller body, and includes a convex portion that moves forward and backward from the outer periphery of the side surface of the rod,
The release portion is provided in the insertion hole of the support member of the sheet, and when the convex portion provided on the bottom surface side of the insertion hole is fitted, and when the convex portion is fitted to the enlarged diameter portion, An opening that is opposed to the convex portion and opened in the diameter direction of the rod; and a pair of release buttons that are biased to the outside from the opening,
The detection means is a base plate that is disposed in a seat portion of the seat and has a gap between the seat portion and the seat portion,
The release prevention unit is
A long hole through which the rod passes, a protrusion that is disposed between the release button and the rod to prevent the release portion from being released, and an unlocking prevention member that can move forward and backward toward the rod;
A cable body having one end connected to both side surfaces of the base plate;
A link member that connects to the other end of the cable body and contacts the unlocking prevention member to move the unlocking prevention member forward and backward toward the rod;
An elastic body that fixes one end to the support member, fixes the other end to the link member, and urges the cable body in the direction of pulling up to form a gap between the base plate and the bottom surface of the sheet;
The stroller according to claim 1 or 2, further comprising:   The stroller according to any one of claims 1 to 6, wherein the seat is one of an infant bed, an infant chair, and a pet bed. In the case where the sheet is the baby bed,
The stroller according to claim 7, wherein the stroller body has the infant chair attached to a lower side of the baby bed.