JP6696764B2 - stroller - Google Patents

Description

  The present invention relates to a stroller.

  The stroller described in Patent Document 1 includes a pair of left and right front legs to which front wheels are attached, a pair of left and right rear legs to which rear wheels are attached, and a pair of armrests. The front ends of the front and rear legs are rotatably supported at the front end of the armrest, and the side vertical pipes are rotatably supported at the rear end. A frame attachment member is attached to the lower end of the side vertical pipe. A back support frame is rotatably supported by the frame mounting member, and a side frame is also supported by the frame mounting member. One end of the side frame is supported by the front leg, and the other end of the side frame is supported by the frame mounting member. A base sheet material is stretched on the side frame and the backrest support frame to form a seating surface on which an infant rides and a backrest.

Japanese Patent No. 4855035 JP 2001-97227 A

  In the stroller of Patent Document 1, a side frame that constitutes a seat surface and a backrest support frame that constitutes a backrest part are attached with front legs and rear wheels to which front wheels are attached via members such as frame attachment members. It is connected to the hind legs. Further, a mechanism for damping vibration is not provided between the front legs and the rear legs and the seat surface and the back support portion. For this reason, vibrations from the front wheels and the rear wheels are transmitted to the seat surface and the back support.

  Patent Document 2 describes a suspension that absorbs vibration applied to a seat surface. Even if the suspension of Patent Document 2 is applied to Patent Document 1, it is possible to damp the vibration to the seat surface, but still the back rest part has the back rest part via the frame attachment member to the front legs and the rear legs. Because it is connected with, the vibration is transmitted.

  An object of the present invention is to provide a stroller capable of suppressing the transmission of vibrations to a seat surface and a backrest part.

  A stroller that solves the above-mentioned problems is rotatably supported with respect to the seat plate member at a seat plate member having a seat surface formed on one surface and a rear end portion in the front-rear direction of the seat plate member. A back support part to which a wheel is connected, a frame supporting the seat plate member, and a bridge between the seat plate member and the frame, and the seat plate member with respect to the frame. An elastic member that supports the surface so that it can be displaced in the direction of the load applied to the surface.

  According to the above configuration, since the back support part is rotatably supported by the seat plate member elastically supported by the elastic member, the vibrations from the front and rear legs are also transmitted to the back support part. Is suppressed.

In the stroller, the seat plate member may include a seat surface portion having the seat surface formed on one surface, and a support portion disposed on a back surface of the seat surface. In this case, the frame includes a guide member that guides the displacement of the seat plate member with respect to the frame, and the elastic member is bridged between the support portion and the guide member.
According to the above configuration, the displacement of the seat plate member with respect to the frame can be guided by the guide member fixed to the frame.

In the stroller, the guide member may include a stopper that restricts the displacement in the load direction by abutting a part of the support portion when the support part is displaced in the load direction.
According to the above configuration, the stopper can limit the amount of displacement of the support portion in the load direction and can prevent excessive displacement.

In the stroller, the stroke until the rear support portion contacts the stopper may be longer than the stroke until the front support portion contacts the stopper.
According to the above configuration, it is possible to prevent the ride comfort from being deteriorated even when an infant or the like is placed in a lying posture and the center of gravity is located rearward.

In the above stroller, a part of the support portion may be configured by a cushioning body that comes into contact with the stopper.
According to the above configuration, the shock absorber and the stopper come into contact with each other, so that shock and vibration can be softened.

In the stroller, the elastic member may be a tension coil spring.
According to the above structure, a tension coil spring having a simple structure can be used as the elastic member.

In the stroller, a headrest rotatably supported with respect to the backrest portion, and a tip end swingably supported at both end portions of the headrest, and a base end portion rotatably supported by the frame. A pair of side plates supported may be provided, and the headrest and the side plates may have an elastic structure.
According to the above configuration, the vibration from the frame is damped by the elastic structure of the headrest and the side plate, and is prevented from being transmitted to the back support portion.

  INDUSTRIAL APPLICABILITY The present invention can provide a stroller capable of suppressing the transmission of vibration to the seat surface and the backrest portion.

It is a perspective view showing a stroller as one embodiment. It is a perspective view showing a state where a seat plate member is attached to a side frame. It is an exploded perspective view showing a support part and a guide member. It is a side view which shows the state by which the seat plate member was attached with respect to the side part frame. FIG. 6 is a perspective view showing a mounting relationship among a back support frame, a headrest, and a side plate in a back support portion. FIG. 6 is a side view showing a state in which a seat plate member is displaced downward with respect to a side frame by a load.

Hereinafter, a stroller to which the present invention is applied will be described with reference to FIGS. 1 to 6.
FIG. 1 shows a one-seater stroller 1 for carrying an infant or the like, and the stroller 1 is used with the infant or the like lying down or sitting down. In addition, the state of the stroller 1 shown in FIG. 1 shows a state of pushing the back side to operate the stroller 1 from the rear side, and in the following description, the traveling direction is defined as “front” based on the state of pushing the back side, The direction opposite to the traveling direction is defined as rear (back), the left-right direction is defined as left and right with respect to the traveling direction, and the vertical direction is defined as upper and lower with respect to the traveling direction. It should be noted that in the above illustration, a seat member made of a cushion material or the like is omitted.

  The stroller 1 includes a pair of front leg frames 11, a pair of rear leg frames 12, and a seat plate member 13 on which an infant or the like can ride in a lying position or a sitting position. Each front leg frame 11 has a linear shape, and a front wheel 11a with casters is arranged at one end thereof. Each rear leg frame 12 has an L shape, and a rear wheel 12a with casters is arranged at one end thereof. The pair of front leg frames 11 are connected by a front stay 14 that crosses in the left-right direction, and the pair of rear leg frames 12 are also connected by a rear stay 15 that crosses in the left-right direction. The front stay 14 is provided with a step 18 for hanging a foot.

  An armrest 16 is rotatably supported at the other end of the pair of front leg frames 11 opposite to the one end where the front wheels 11a are arranged. The pair of rear leg frames 12 also has an armrest 16 rotatably supported at the other end opposite to the one end where the rear wheels 12a are arranged. The seat plate member 13 is arranged between the pair of front leg frames 11 and the pair of rear leg frames 12 and at an intermediate position between the front wheel 11a and the rear wheel 12a and the armrest 16. Specifically, between the right front leg frame 11 and the rear leg frame 12, and between the left front leg frame 11 and the rear leg frame 12, the side frames 17 are arranged in the front-rear direction. Each side frame 17 has an L-shape, a front end is rotatably supported in the middle of the front leg frame 11 in the longitudinal direction, and a rear end is located above the front end. The rear leg frame 12 is positioned and rotatably supported at a middle bent portion of the rear leg frame 12. The side frame 17 is a member to which vibration during traveling is directly transmitted from the front leg frame 11, the rear leg frame 12, and the like. The left and right side edges of the seat plate member 13 are supported so as to be elastically displaceable with respect to the side frame 17.

  As shown in FIG. 2, the seat plate member 13 has a seat surface portion 21 having a rectangular plate shape. The seat surface portion 21 has an upper surface serving as a seat surface 21a, and a front support portion 22f and a rear support portion 22b are disposed on both left and right edge portions along the front-rear direction on the back surface opposite to the seat surface 21a. Note that, hereinafter, the front support portion 22f and the rear support portion 22b are also simply referred to as the support portion 22.

  The two front support portions 22f arranged on the back surface of the seat surface portion 21 are elastically displaceably supported in front of the left and right side frames 17, and the two rear support portions 22b arranged on the back surface of the seat surface portion 21 are It is supported behind the left and right side frames 17 so as to be elastically displaceable. In this way, the seat plate member 13 is supported by the left and right side frames 17 at two positions in the front and two positions in the rear, which is a total of four positions. At each of the left and right side edge portions of the seat surface portion 21, the front support portion 22f and the rear support portion 22b are arranged such that the distance W1 between the front end portions is wider than the distance W2 between the base end portions, and the whole has an inverted V shape. Has been done.

  Further, each side frame 17 includes a front guide member 23f that guides the front support portion 22f at a position intersecting with the front support portion 22f. The front guide member 23f is fixed to the front leg frame 11 and the side frame 17 by a fixing member such as a screw. In addition, each side frame 17 includes a rear guide member 23b that guides the rear support portion 22b at a position that intersects with each rear support portion 22b. The rear guide member 23b is fixed to the side frame 17 by the same means as the front guide member 23f. A horizontal stay 29 is bridged between the left and right front guide members 23f and between the left and right rear guide members 23b. As shown in FIG. 3, the elastic member 24 is bridged between the front support portion 22f and the front guide member 23f, and the elastic member 24 is bridged between the rear support portion 22b and the rear guide member 23b. ..

  The function of the front guide member 23f for the front support portion 22f and the function of the rear guide member 23b for the rear guide member 23b are the same. Therefore, hereinafter, the front guide member 23f and the rear guide member 23b are also simply referred to as the guide member 23. Further, FIG. 3 shows a support structure of the front support portion 22f and the front guide member 23f. The mounting structure of the guide member 23 is not particularly limited. For example, the front guide member 23f and the rear guide member 23b may be attached only to the side frame 17, the front guide member 23f may be attached only to the front leg frame 11, or the rear guide member. The member 23b may be attached only to the rear leg frame 12.

  As shown in FIG. 4, the guide member 23 is a guide surface 25 of the support portion 22 at a position along the side surface of the support portion 22, and is configured by an inclined surface parallel to the inclined side surface 25 a of the support portion 22. The guide surface 25 faces the inclined side surface 25a located outside in the front-rear direction of the support portion 22 and guides the inclined side surface 25a. That is, the guide surface 25 of the front guide member 23f faces the inclined side surface 25a located in front of the front support portion 22f, and the guide surface 25 of the rear guide member 23b lies in the inclined side surface 25a located behind the rear support portion 22b. To face. Each guide surface 25 includes a guide piece 26 that is continuous with the guide surface 25 and extends in the direction of the seat surface portion 21. The guide piece 26 guides the displacement of the inclined side surface 25a together with the guide surface 25, reduces the gap between the inclined side surface 25a and the guide member 23, and suppresses foreign matter from being caught. Further, two front support portions 22f and rear support portions 22b are located between the two guide pieces 26 located in the front-rear direction. When the seat plate member 13 is displaced upward, the two guide pieces 26 press the front support portion 22f and the rear support portion 22b from the outer side in the front-rear direction so that the front support portion 22f and the rear support portion 22f are supported. It functions as a retainer for the portion 22b.

  The elastic member 24 serves as a suspension between the seat plate member 13 and the side frame 17. The elastic member 24 is a tension coil spring, and includes a first mounting end 24a and a second mounting end 24b. The first mounting end 24a is fixed to a first fixing member 24c fixed inside the support portion 22 by crimping or the like. The second mounting end 24b is fixed to a second fixing member 24d provided inside the guide member 23. The first mounting end 24a on the side of the support portion 22 is located inside the second mounting end 24b on the side of the guide member 23 in the front-rear direction, and is on the load direction side of the second mounting end 24b on the side of the guide member, that is, Located below. Accordingly, when a baby or the like is placed on the elastic member 24, the elastic member 24 expands due to the load, and at this time, the seat plate member 13 is elastically supported by the pulling force.

  The guide member 23 is provided with a stopper 27 that restricts a displacement amount in a direction in which the support member 22 is displaced by a load. The stopper 27 enters into the support portion 22 and abuts on a buffer body 28 a arranged in a mounting recess 28 provided in a part of the support portion 22. Accordingly, the stopper 27 restricts the support portion 22 from being excessively displaced in the load direction with respect to the guide member 23.

Here, the stroke L1 until the shock absorber 28a of the rear support portion 22b hits the stopper 27 is set to be longer than the stroke L2 until the shock absorber 28a of the front support portion 22f hits the stopper 27. When an infant or the like is seated on the seat surface portion 21, the center of gravity is located behind the seat surface portion 21 in the lying position, and in the sitting position, the center of gravity is more than in the lying position. Move forward. Therefore, when an infant or the like is laid down, a larger load is applied to the rear side of the seat surface portion 21 than to the front side, and the displacement amount of the elastic member 24 located on the rear side is larger than that of the elastic member 24 located on the front side. .. As described above, since the displacement amount of the rear support portion 22b is larger than the displacement amount of the front support portion 22f, the rear stroke L1 is set to be longer than the front stroke L2. This setting can be realized by separating the position of the rear stopper 27 from the shock absorber 28a from the seat surface portion 21 from the position of the front stopper 27 from the shock absorber 28a.
When the position of the stopper 27 is not changed, it can be realized by bringing the position of the buffer body 28a of the rear support part 22b closer to the seat surface part 21 than the position of the buffer body 28a of the front support part 22f. Further, this setting can be performed by adjusting the positions of both the stopper 27 and the buffer 28a.

  As shown in FIG. 5, a back support frame 31 is rotatably supported at the rear end of the seat plate member 13. The back support frame 31 includes a pair of vertical frame portions 31a and a horizontal frame portion 31b that connects the pair of vertical frame portions 31a, and has a U-shape as a whole. The tip ends of the pair of vertical frame portions 31a are rotatably supported by a rotation shaft 30a on a rotation support portion 30 provided at a rear end portion of the seat surface portion 21. A back sheet having elasticity is attached to the backrest support frame 31 and the seat surface portion 21, and a portion of the backsheet supported by the backrest support frame 31 serves as a backrest portion.

  A rectangular headrest 32 that protects the head of an infant or the like is rotatably supported by a hinge 33 on the lateral frame portion 31b. The headrest 32 includes a head support portion 32a that supports the head of an infant or the like, and a pair of support pieces 32b that are erected in a direction orthogonal to the head support portion 32a. The headrest 32 has a thin plate shape, and has a large number of holes formed in its main surface. The headrest 32 has sufficient strength to support the head, yet has breathability and is elastic so that it can easily bend in the thickness direction. It has a structure. The support piece 32b is provided with a cam hole 32c that is an elongated hole that controls the rotation of the headrest 32.

To the headrest 32, a pair of side plates 34 for protecting side portions of an infant or the like are connected along the pair of vertical frame portions 31a. The pair of side plates 34 also have an elongated thin plate shape, a large number of holes are formed in the main surface thereof, and while having the strength to support a side part of an infant or the like, it has breathability, It has an elastic structure that is easily bent in the thickness direction. The front end portions of the pair of side plates 34 on the side of the headrest 32 are provided with a rotation control protrusion 34a that is engaged with the cam hole 32c. The headrest 32 and the pair of side plates 34 are swingably supported by the rotation control protrusion 34a engaging with the cam hole 32c. Further, the base end portions of the pair of side plates 34 are supported by the rear frame 35 supported by the bent portion of each rear leg frame 12. Each rear frame 35 includes a support shaft 35a, and the base end of the side plate 34 is rotatably supported by each support shaft 35a.
The rotation control protrusion 34a may be provided on the support piece 32b, and the cam hole 32c may be provided on the tip portion of the side plate 34 on the headrest 32 side.

  When the backrest support frame 31 is rotated so that the angle formed by the seatrest portion 21 is large, that is, when the backrest portion is rotated in the direction in which the backrest portion lays down, the headrest 32 moves the side plate 34 in the cam hole 32c of the headrest 32. The rotation control protrusion 34a is displaced in one direction. As a result, the headrest 32 rotates so as to stand up with respect to the backrest portion configured by the vertical frame portion 31a, and becomes capable of protecting the head of an infant or the like in a lying state. On the other hand, when the backrest support frame 31 is rotated so that the angle formed by the backrest support frame 31 is small, that is, when the backrest portion is rotated in the rising direction, the headrest 32 is rotated in the cam hole 32c. 34a is displaced in the other direction. As a result, the headrest 32 is placed in a state substantially parallel to the backrest portion, that is, in a substantially flush state, and the upper portion of the backrest portion is opened.

  The stroller 1 has a handle 36 rotatably supported in the front-rear direction on the outer side of the bent portion of the pair of rear leg frames 12 (see FIG. 1). When the handlebar 36 is located behind the seat plate member 13 (state of FIG. 1), it pushes the stroller 1 to the back side, and when it is located in front of the seat plate member 13, it faces an infant or the like. It will be pushed. When the handle 36 is pushed backward, the casters of the rear wheel 12a located rearward with respect to the traveling direction are locked, and when the handle 36 is face-to-face pushed, the casters of the front wheel 11a located rearward with respect to the traveling direction are locked. Locked.

Next, the operation of the stroller 1 configured as above will be described.
As shown in FIG. 6, when an infant or the like is placed on the seat surface portion 21, a load is applied to the seat surface portion 21 downward. Then, the elastic member 24 bridged between the support portion 22 and the guide member 23 extends, and the seat surface portion 21 is displaced downward by that amount. The seat plate member 13 is supported by the side frame 17 by the four elastic members 24. As a result, the vibration transmitted from the front leg frame 11 and the rear leg frame 12 to the seat plate member 13 via the side frame 17 is damped by the elastic member 24. When the infant or the like is laid down, the center of gravity is located behind the seat surface portion 21, so that the rear elastic member 24 extends more than the front elastic member 24. When an infant or the like is seated, the center of gravity moves forward, so that the elastic amount of the rear elastic member 24 decreases, and the elastic amount of the front elastic member 24 increases correspondingly. Whichever posture the infant or the like gets in, the seat plate member 13 is displaced downward until the cushioning body 28a of the support portion 22 contacts the stopper 27 of the guide member 23. Further, when the seat plate member 13 is displaced downward, a gap is created between the support portion 22 and the guide surface 25 and the guide piece 26 of the guide member 23. Therefore, when a baby or the like is riding and traveling, the seat plate member 13 is displaced forward, backward, leftward and rightward with respect to the guide member 23 due to vibration during traveling.

  On the other hand, when an infant or the like gets off the stroller 1 and the seat surface portion 21 moves upward, the inclined side surface 25a of the support portion 22 is pressed by the guide surface 25 and the guide piece 26, and the guide member 23 moves the support portion. 22 is prevented from slipping upward.

  The back support frame 31, which constitutes the back support, is rotatably supported at the rear end of the seat 21. Vibration of the seat surface portion 21 from the front leg frame 11 and the rear leg frame 12 is suppressed by the elastic member 24, and the back support frame 31 is also rotatable to the rear end portion of the seat surface portion 21 in which the vibration is suppressed. Vibration is suppressed by being supported. The back support frame 31 is supported by the rear frame 35 supported by the rear leg frame 12 via the headrest 32 and the side plate 34. In this respect, since the headrest 32 and the side plate 34 have an elastic structure, the vibration from the rear frame 35 is damped by the headrest 32 and the side plate 34, and the backrest support frame 31 that constitutes the backrest portion receives the vibration. Transmission is suppressed.

According to the stroller 1 as described above, the effects listed below can be obtained.
(1) The seat plate member 13 having the seat surface portion 21 is elastically supported by the elastic member 24 with respect to the side frame 17 connected to the front leg frame 11 and the rear leg frame 12. Therefore, transmission of vibrations from the front leg frame 11 and the rear leg frame 12 to the seat surface portion 21 is suppressed. Therefore, the riding comfort of the stroller 1 can be improved. Vibration caused by inertial force when starting or stopping, as well as when traveling, can be damped by the elastic member 24.
(2) The elastic member 24 is configured by a tension coil spring having a simple structure, and the first mounting end 24a on the support portion 22 side is located on the load direction side, that is, below the second mounting end 24b on the guide member 23 side. As a result, the height of the seat surface portion 21 with respect to the side frame 17 can be made lower than that when a compression coil spring is used. Therefore, the stability of the seat surface portion 21 is enhanced.
(3) The back support frame 31 is rotatably supported by the seat surface portion 21 elastically supported by the elastic member 24. Therefore, it is possible to prevent the vibrations from the front leg frame 11 and the rear leg frame 12 from being transmitted to the back support portion.
(4) The back support frame 31 is supported by the rear frame 35 supported by the rear leg frame 12 via the headrest 32 and the side plate 34, but the vibration is transmitted to the back support frame 31. In addition, the headrest 32 and the side plate 34 are damped. That is, the vibration from the rear frame 35 is damped by the elastic structure of the headrest 32 and the side plate 34.
(5) The displacement of the seat plate member 13 with respect to the side frame 17 can be guided by the guide member 23 fixed to the side frame 17. Further, the guide member 23 can make the elastic member 24 hard to see from the outside by disposing the second mounting end 24b of the elastic member 24 inside.
(6) The seat plate member 13 is supported by the elastic member 24 with respect to the side frame 17 via the guide member 23 at four points. Therefore, the seat plate member 13 is stably supported by the side frame 17.
(7) When an infant gets off the stroller 1 and the seat surface portion 21 moves upward, the inclined side surface 25a of the support portion 22 is pressed from the outside in the front-rear direction by the guide surface 25 and the guide piece 26, and the guide member It is possible to prevent the support portion 22 from coming out of the upper portion 23.
(8) The support portion 22 can regulate the downward displacement amount by the buffer 28a coming into contact with the stopper 27 of the guide member 23. The cushioning body 28a directly suppresses a part of the support portion 22 from coming into contact with the stopper 27. As a result, it is possible to reduce the occurrence of shock and vibration when the stopper 27 abuts on the buffer 28a. For example, even if a heavy baby gets on the vehicle and the seat plate member 13 largely sinks, and the stopper 27 continues to be in contact with the stopper 28a, the buffer 28a can damp and absorb the vibration.
(9) Each guide surface 25 is provided with a guide piece 26 that is continuous with the guide surface 25 and extends toward the seat surface portion 21. The guide piece 26 guides the displacement of the inclined side surface 25a together with the guide surface 25, reduces the gap between the inclined side surface 25a and the guide member 23, and suppresses foreign matter from being caught.
(10) Since the stroke L1 of the rear support portion 22b is set to be longer than the stroke L2 of the front support portion 22f, even when an infant or the like is placed in a lying position and the center of gravity is located rearward. It is possible to prevent the ride quality from being deteriorated.

The stroller 1 may be modified as follows.
The buffer body 28a may be omitted, and the stopper 27 may abut on the regulation wall that is integral with the support portion 22.
In order to set the rear stroke L1 to be longer than the front stroke L2, a coil spring having different hardness may be used for the elastic member 24. That is, the hardness of the elastic member 24 arranged at the front for increasing the stroke may be set to be harder than that of the elastic member 24 arranged at the rear.
The rear stroke L1 and the front stroke L2 may be the same. For example, when the rear stroke L1 and the front stroke L2 are sufficiently secured regardless of the movement of the center of gravity of the baby or the like on the seat surface portion 21, even if the rear stroke L1 and the front stroke L2 are the same. Good.
The stopper 27 may be arranged not on the guide member 23 but on the side frame 17, for example. Further, the stopper 27 may be omitted.
-The guide piece 26 may be omitted. For example, when the length of the guide surface 25 is sufficiently long and there is no possibility that the front support portion 22f and the rear support portion 22b will be pulled out upward from between the front and rear guide members 23, or when the removal is prevented by other means. In addition, the guide piece 26 can be omitted.

The distance W1 between the front end of the front support 22f and the rear support 22b may be the same as the distance W2 between the base end of the front support 22f and the rear support 22b. .. That is, the front support portion 22f and the rear support portion 22b may be parallel to each other.
In the elastic member 24, the height of the first attachment end 24a attached to the support portion 22 and the height of the second attachment end 24b attached to the guide member 23 may be the same. That is, the first mounting end 24a may be positioned below the position of the second mounting end 24b in the load direction.
-The guide member 23 may be omitted. In this case, the elastic member 24 is bridged between the side frame 17 and the support portion 22.

The seat plate member 13 may be supported on the side frame 17 at three points, two points, or one point by the elastic members 24. Further, the elastic member 24 may be supported at five or more points.
The elastic member 24 may be rubber or the like instead of the tension coil spring. Further, the elastic member 24 may be a compression coil spring. In the case of a compression coil spring, it is arranged on the side frame 17 or the like so that the compression direction is vertical, and the seat plate member is arranged on the compression coil spring. The number of compression coil springs arranged is preferably four so that the seat plate member can be stably supported. In this case, the compression coil springs are arranged at two front and two rear positions in the front-back direction of the seat surface. Of course, the number of compression coil springs may be three, two, or one. Further, it may be five or more.

  1 ... Stroller, 11 ... Front leg frame, 11a ... Front wheel, 12 ... Rear leg frame, 12a ... Rear wheel, 13 ... Seat plate member, 14 ... Front stay, 15 ... Rear stay, 16 ... Armrest, 17 ... Side frame, 18 ... Step, 21 ... Seat surface part, 21a ... Seat surface, 22 ... Support part, 22f ... Front support part, 22b ... Rear support part, 23 ... Guide member, 23f ... Front guide member, 23b ... Rear guide member, 24 ... Elastic member, 24a ... First mounting end, 24b ... Second mounting end, 24c ... First fixing member, 24d ... Second fixing member, 25 ... Guide surface, 25a ... Inclined side surface, 26 ... Guide piece, 27 ... Stopper, 28 ... Mounting recess, 28a ... Buffer, 29 ... Horizontal stay, 31 ... Back support frame, 30 ... Rotating support part, 30a ... Rotating shaft, 31a ... Vertical frame part, 31b ... Horizontal frame part, 32 ... Headrest , 32a ... Head support part, 32b ... Support piece, 32c ... Cam hole, 33 ... Hinge, 34 ... Side plate, 34a ... Rotation control projection, 35 ... Rear frame, 36 ... Handle.

Claims (4)

A seat plate member having a seat surface on one surface,
A back support portion rotatably supported with respect to the seat plate member at a rear end portion in the front-rear direction of the seat plate member;
A frame connected to the wheels and supporting the seat plate member,
An elastic member that is bridged between the seat plate member and the frame, and that supports the seat plate member so as to be displaceable in the load direction applied to the seat surface with respect to the frame ;
The seat plate member includes a seat surface portion having the seat surface formed on one surface, and a support portion arranged on the back surface with respect to the seat surface, and the support portion is provided in front and rear of the frame in the front-rear direction. The
The frame includes a guide member for guiding the displacement of the seat plate member with respect to the frame, corresponding to the support portion,
The elastic member is bridged between the support portion and the guide member,
The guide member includes a stopper that restricts the displacement in the load direction by abutting a part of the support portion when the support portion is displaced in the load direction.
A stroller in which the stroke until the rear support portion contacts the stopper is longer than the stroke until the front support portion contacts the stopper . The portion of the support portion, stroller according to claim 1 wherein a stopper abutting to cushion. The elastic member pulls stroller according to claim 1 or 2 which is a coil spring. A headrest rotatably supported with respect to the back rest,
At both ends of the headrest, a tip end is swingably supported, and a base end is provided with a pair of side plates rotatably supported by the frame,
The stroller according to any one of claims 1 to 3 , wherein the headrest and the side plate have an elastic structure.