Infant rearing device with wheels

Abstract

The present invention relates to a child-rearing device with a wheel, and an object of the present invention is to provide a child-rearing device with a wheel capable of reliably preventing twisting of a wire. As a solution of the present invention, a child-rearing tool with a wheel is provided with: a foot part; a universal wheel mechanism; and a brake mechanism. The brake mechanism includes a pair of lock members provided to stop rotation of each of the pair of wheels, an operation member, and a coupling member that couples the lock members and the operation member. The connection member has: a pair of moving members that move by the operation of the operation member; a long member that connects the operating member and the moving member; and a pair of driven members that are provided so as to be rotatable with respect to the moving member and follow the movement of the moving member. The locking member is connected to the driven member and is arranged to be capable of moving between a clamping position and a non-clamping position in linkage with the movement of the driven member.

Description

Technical Field

[0001] This invention relates to a childcare appliance with wheels, and more particularly to a childcare appliance with wheels having a pair of wheels that are separated from each other in the width direction. Background Technology

[0002] To date, strollers employing so-called simultaneous left and right braking are known, where a pair of casters arranged side-by-side in the width direction can be braked simultaneously by operating a single control mechanism. As described below, for such strollers with casters, there is already a technique for braking the wheels while keeping the casters in a rotatable state.

[0003] Japanese Patent Application Publication No. 2015-202808 (Patent Document 1) discloses a pair of universal wheels with braking members respectively. The braking members are connected to an operating member provided on a cross frame member via a wire and a relay member. The pair of universal wheels can be braked simultaneously by operating the operating member. Furthermore, since the braking members are configured to rotate relative to the relay member, kinking of the wire can be prevented.

[0004] Japanese Patent Publication No. 2023-548806 (Patent Document 2) discloses a locking member provided for each pair of wheels. The locking member is connected to an operating member via a first wire and a second wire rotatably provided via the first wire. By operating the operating member, the pair of wheels can be braked simultaneously, and the rotatable second wire prevents the wire from twisting.

[0005] [Existing Technical Documents]

[0006] [Patent Literature]

[0007] Patent Document 1: Japanese Patent Application Publication No. 2015-202808

[0008] Patent Document 2: Japanese Patent Publication No. 2023-548806. Summary of the Invention

[0009] [The problem that the invention aims to solve]

[0010] As mentioned above, both Patent Document 1 and Patent Document 2 are omnidirectional wheels, and the improvements make it so that the wires will not tangle even when the omnidirectional wheel rotates. However, in well-known childcare devices with wheels, there is already a situation where friction occurs between the parts, and the wires tangle as the omnidirectional wheel rotates.

[0011] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a childcare device with wheels that can reliably prevent wire tangling.

[0012] [Technical means used to solve the problem]

[0013] To achieve the above objectives, one embodiment of the present invention provides a wheeled childcare device comprising a main frame, a pair of arm members, a pair of wheels, and a braking mechanism. The main frame includes a pair of legs separated from each other in the width direction. The upper ends of the pair of arm members are rotatably held at the lower ends of the pair of legs via a pair of rotating shafts. The pair of wheels are rotatably supported at the lower ends of the pair of arm members via a pair of axles. The braking mechanism includes: a pair of locking members configured to stop the rotation of each of the pair of wheels, displaced between an engaged position where the pair of wheels are engaged and a disengaged position where the pair of wheels are not engaged; an operating member that operates the pair of locking members from the disengaged position to the engaged position; and a connecting member connecting the operating member and the pair of locking members. The braking mechanism can perform braking operations without interference from the rotational movement of the pair of arm members and can maintain a braking state.

[0014] Preferably, the arm member includes a guide portion formed as an elongated hole, and the locking member is configured to move along the long side of the guide portion.

[0015] Preferably, the guide portion is located on the straight line connecting the rotating shaft and the axle.

[0016] The preferred connecting member comprises: a pair of movable members that move by operation of an operating member; a long strip member that connects the operating member and the pair of movable members; and a pair of driven members that move in accordance with the movement of the pair of movable members.

[0017] The locking member preferably has: a locking pin housed in a guide portion; and a shaft extending from the locking pin along its long side and configured to be rotatable for the driven member.

[0018] Preferably, the shaft of the locking member extends substantially parallel to the rotation axis of the arm member.

[0019] More preferably, it has an arm spring mechanism that causes the lower ends of a pair of arm members to spring towards the ground.

[0020] A preferred embodiment is an elastic body located between the foot and the arm component.

[0021] Preferably, the connecting member further includes a pair of second spring-pushing members, which are used to spring a pair of moving members to push a pair of locking members toward the non-engaged position.

[0022] Another embodiment of the present invention, a childcare device with wheels, comprises: a main frame including a pair of legs arranged separately in the width direction; a caster wheel mechanism having a pair of caster wheel retaining members and a pair of caster wheel rotating members, the pair of caster wheel retaining members being disposed at the lower ends of the pair of legs, the pair of caster wheel rotating members being held about the pair of caster wheel retaining members so as to be rotatable about a rotation axis extending in the vertical direction, and supporting a pair of wheels so that the wheels can rotate; and a braking mechanism including: a pair of locking members configured to stop the rotation of the pair of wheels, and engaging the wheels. The system comprises: a position and displacement between the non-engaged position of the engaged wheel and the non-engaged position; an operating member that operates a pair of locking members from the non-engaged position to the engaged position; and a connecting member that connects the operating member and the locking members; the connecting member having: a pair of movable members that move by operation of the operating member; a long strip member that connects the operating member and the movable members; and a pair of driven members configured to rotate relative to the movable members and follow the movement of the movable members; and locking members connected to the driven members and configured to move in conjunction with the movement of the driven members, and to displace between the engaged position and the non-engaged position.

[0023] The driven member preferably includes: a rotating member configured to rotate relative to the moving member; a vertical moving member configured to move vertically together with the rotating member; and a first push member that pushes the vertical moving member upward relative to the rotating member.

[0024] The driven member preferably includes: a rotating member having a locking member support portion having a shaft portion supporting the locking member and configured to rotate relative to the moving member; and a first push member that pushes the locking member toward the engaging position.

[0025] A preferred embodiment is the long strip member passing through the rotation axis of the universal wheel mechanism.

[0026] Preferably, the connecting member further includes a pair of second spring-pushing members, which are used to spring a pair of moving members to push a pair of locking members toward the non-engaged position.

[0027] The locking member preferably has: a locking pin that is displaced relative to the wheel between an engaged position and an unengaged position; and a shaft that extends from the locking pin along its long side and is rotatable for the driven member.

[0028] Preferably, the shafts of the moving member, the driven member, and the locking member pass through the rotation axis of the caster mechanism.

[0029] Another embodiment of the present invention comprises a wheeled childcare device including: a main frame comprising a pair of legs arranged separately in the width direction; a caster wheel mechanism having a pair of caster wheel retaining members and a pair of caster wheel rotating members, the pair of caster wheel retaining members being disposed at the lower ends of the pair of legs, the pair of caster wheel rotating members being held about the pair of caster wheel retaining members so as to be rotatable about a rotation axis extending in the vertical direction, and supporting a pair of wheels to allow the wheels to rotate; and a braking mechanism comprising: a pair of locking members configured to stop the rotation of the pair of wheels, in The displacement between the engaged position of the engaged wheel and the disengaged position of the disengaged wheel; an operating member that operates a pair of locking members from the engaged position to the disengaged position; and a connecting member that connects the operating member and the locking members; the connecting member has: an elongated member that passes through a position different from the rotation axis of the caster wheel mechanism; a pair of movable members that are connected to the elongated member and moved by the operation of the operating member; and a pair of driven members that are rotatable relative to the pair of movable members and have locking member support portions that support the shaft portions of the pair of locking members.

[0030] A more preferred embodiment is that the driven member follows the vertical movement of the moving member.

[0031] The driven member preferably includes: a rotating member configured to rotate relative to the moving member and having a locking member support portion having a shaft portion for supporting the locking member; and a first push member for pushing the shaft portion to push the locking member toward the engaging position.

[0032] Preferably, the rotating component rotates together with the universal wheel rotating component.

[0033] Preferably, the shaft of the locking member is located at a position offset from the rotation axis of the caster mechanism.

[0034] Preferably, the locking member support of the rotating member protrudes from the outer peripheral surface of the universal wheel retaining member.

[0035] [Effects of the invention]

[0036] The childcare device with wheels according to the present invention can reliably maintain a braking state. Attached Figure Description

[0037] Figure 1 A perspective view showing a portion of the childcare device with wheels according to Embodiment 1 of the present invention.

[0038] Figure 2 This is an exploded perspective view of the braking mechanism surrounding the device according to Embodiment 1 of the present invention.

[0039] Figure 3 This is an enlarged cross-sectional view showing a portion of the periphery of the braking mechanism according to Embodiment 1 of the present invention.

[0040] Figure 4 This is a perspective view of the operating component of Embodiment 1 of the present invention. Figure 4 Section (A) displays the status of the operating components during walking. Figure 4 Section (B) shows the status of the operating components when braking.

[0041] Figure 5 To display the diagram showing the transition from walking to braking, Figure 5 Section (A) displays the walking status. Figure 5 Section (B) shows the in-trip status between the walking state and the braking state. Figure 5 Section (C) shows the braking status.

[0042] Figure 6 This diagram illustrates the load-bearing state of the main frame during movement. Figure 6 Section (A) displays the walking status. Figure 6 Section (B) shows the load-bearing status.

[0043] Figure 7 A diagram showing the load-bearing state of the main frame under braking conditions. Figure 7 Section (A) shows the braking status. Figure 7 Section (B) shows the load-bearing status.

[0044] Figure 8 This is a side view of the braking mechanism in Embodiment 2 of the present invention.

[0045] Figure 9 This is an exploded perspective view of the braking mechanism surrounding the device according to Embodiment 2 of the present invention.

[0046] Figure 10 This is an enlarged cross-sectional view of a portion of the braking mechanism in Embodiment 2 of the present invention.

[0047] Figure 11 To display the diagram showing the transition from walking to braking, Figure 11 Section (A) displays the walking status. Figure 11 Section (B) shows the in-trip status between the walking state and the braking state. Figure 11 Section (C) shows the braking status.

[0048] Figure 12 This diagram illustrates the load-bearing state of the main frame during movement. Figure 12 Section (A) displays the walking status. Figure 12 Section (B) shows the load-bearing status.

[0049] Figure 13A diagram illustrating the load-bearing state of the main frame under braking conditions. Figure 13 Section (A) shows the braking status. Figure 13 Section (B) shows the load-bearing status.

[0050] Figure 14 This is a cross-sectional view of a portion of the braking mechanism according to Embodiment 3 of the present invention. Figure 14 Section (A) displays the walking status. Figure 14 Section (B) shows the braking status.

[0051] Explanation of reference numerals in the attached figures

[0052] 1. Stroller (baby care equipment)

[0053] 10. Ontology Framework

[0054] 11, 11a, 11b Foot

[0055] 12 horizontal structural components

[0056] 20, 20a, 20b Universal wheel mechanism

[0057] 21. Caster wheel retaining components

[0058] 22 wires

[0059] 23. Universal wheel locking components

[0060] 24 Wire fasteners

[0061] 25 swivel wheel rotating components

[0062] 26 swivel wheel axle

[0063] 27 Hole

[0064] 28 sales

[0065] 30-arm component

[0066] 31 Arm Body

[0067] 32 Rotating shaft

[0068] 33. Long hole (guide section)

[0069] 34 Arm Holding Section

[0070] 34a Base section

[0071] 35. Elastomer (arm spring-push mechanism)

[0072] 37 Hole

[0073] 40, 40a, 40b wheels

[0074] 41 axles

[0075] 42 Tire Section

[0076] 43 Wheel section

[0077] 44 locking recess

[0078] 50, 50A, 50B braking mechanisms

[0079] 60 Operating components

[0080] 61. Maintenance Section

[0081] 62 User Operation Section

[0082] 70, 70A, 70B locking components

[0083] 71 Lock the main body

[0084] 72,72A Locking Pin

[0085] 73 Shaft

[0086] 74 Guide pins

[0087] 74A Lock-on Guidance

[0088] 80, 80A Connecting Structural Components

[0089] 81. Long strip components

[0090] 82 External wiring

[0091] 83 Inner wire

[0092] 84, 84A, 84B Moving Components

[0093] 85, 85A, 85B wire fixing parts

[0094] 86. Protrusion

[0095] 86A Longitudinal Section

[0096] 86B Trench

[0097] 87 Card-connecting section

[0098] 87A Lower horizontal section

[0099] 88 Second missile pusher component

[0100] 90, 90A, 90B driven components

[0101] 91, 91A, 91B Rotating Components

[0102] 92. The part that was stuck together.

[0103] 92A Upper Housing

[0104] 92B Upper Shell

[0105] 93 Vertical section

[0106] 93A Lower Housing

[0107] 93B Lower Cylinder

[0108] 94 Lower horizontal section

[0109] 94A Locking Component Support

[0110] 95. Moving components (up and down)

[0111] 95A Ring Section

[0112] 96 Upper horizontal section

[0113] 96A Collaborative Components

[0114] 97 Vertical section

[0115] 97A Upper horizontal section

[0116] 98 Support Department

[0117] 98A Longitudinal Section

[0118] 99 First push component

[0119] 99A Lower horizontal section

[0120] 101A Cover

[0121] A1, A2 arrows

[0122] L,La,Lb rotation axes

[0123] R is the road surface. Detailed Implementation

[0124] The embodiments of the present invention will now be described in detail with reference to the figures. Here, identical or equivalent parts in the figures are labeled with the same symbols, and their descriptions are not repeated.

[0125] First, refer to Figures 1 to 3 This describes the general structure of the stroller according to this embodiment. In particular, as... Figure 1 As shown, the childcare device with wheels in this embodiment is typically a stroller 1, which generally includes: a main frame 10; a pair of universal wheel mechanisms 20; a pair of arm members 30; and a pair of wheels 40. Figure 1 Arrow A1 indicates the direction of travel of stroller 1, and arrow A2 indicates the direction orthogonal to the direction of travel, also known as the width direction or left-right direction.

[0126] The following description uses a stroller as an example to illustrate a childcare appliance with wheels. However, childcare appliances with multiple wheels 40 at the lower end of the main frame 10, such as baby cradles, baby chairs, tricycles, etc., are also acceptable.

[0127] like Figure 1 As shown, the body frame 10 includes: a pair of legs 11a and 11b that are separated from each other in the width direction; and a horizontal structural member 12 that spans between the pair of legs 11a and 11b. The body frame 10 is typically the legs, but it can be any body frame that forms the skeleton of a childcare appliance.

[0128] A pair of caster wheel mechanisms 20a and 20b are configured to make wheels 40a and 40b casters. The caster wheel mechanisms 20a and 20b are respectively located at the lower ends of a pair of feet 11a and 11b. When distinguishing the left and right sides of the feet 11, caster wheel mechanisms 20a, and wheels 40, the part on the right side when viewed from the rear is referred to as foot 11a, caster wheel mechanism 20a, and wheel 40a, and the part on the left side when viewed from the rear is referred to as foot 11b, caster wheel mechanism 20b, and wheel 40b. When there is no need to distinguish left and right, it is simply referred to as foot 11, caster wheel mechanism 20, and wheel 40.

[0129] The caster wheel mechanism 20, designed to allow the wheel 40 to rotate (change direction), includes: a caster wheel retaining member 21 fixed to the lower end of the foot 11; and a caster wheel rotating member 25 disposed below the pair of caster wheel retaining members 21. The caster wheel retaining member 21 includes: a longitudinal portion extending along the extending direction of the foot 11; and a transverse portion orthogonal to the longitudinal portion and extending along the extending direction of the transverse frame member 12. Both the longitudinal and transverse portions are cylindrical for insertion into the foot 11 and the transverse frame member 12. Figure 2 As shown, the foot 11, which is inserted into the universal wheel retaining member 21, is fixed by pin 28.

[0130] The caster wheel swivel member 25 is held relative to the caster wheel retaining member 21 so that it can rotate about a vertically extending axis of rotation, and the wheel 40 is supported by the arm member 30. That is, the caster wheel swivel member 25 can rotate relative to the caster wheel retaining member 21. Figure 2 As shown, for example, a hollow cylindrical swivel axle 26 is fixed to the swivel wheel rotating member 25 and rotates together with the swivel wheel rotating member 25. Figure 3 As shown, the caster wheel axle 26 extends upward from the upper end of the caster wheel rotating member 25 and inserts into the caster wheel retaining member 21. A cable retainer 24 is fixed to the upper end of the caster wheel axle 26 to secure the end of the external cable 82, which will be described later. Figure 2As shown, the swivel wheel rotating component 25 has a hole 27 through which the rotating shaft 32 of the arm component 30 described later passes. The rotating shaft 32 is orthogonal to the extending direction of the swivel wheel shaft 26.

[0131] like Figure 1 As shown, the arm member 30 is rotatably held in relation to the caster wheel rotation member 25 via a pair of rotating shafts 32 at the lower end of a pair of feet 11 and at the upper end of the arm member 30. Therefore, the arm member 30 rotates together with the caster wheel rotation member 25 as it rotates. Figure 2 As shown, the arm component 30 includes: a pair of arm body portions 31; and an arm retaining portion 34, which connects to the upper ends of the pair of arm body portions 31.

[0132] like Figure 2 As shown, a pair of arm body portions 31 are provided at both ends of the wheel 40 in the width direction, forming a shape that clamps the wheel 40 from both ends in the width direction. The pair of arm body portions 31 are of substantially the same shape, forming a longitudinally elongated plate extending vertically. The arm body portions 31 are inclined in a direction closer to the front of the travel direction. The arm body portions 31 are provided with three through holes, including: a hole 37 at the upper end, an elongated hole 33 at approximately the center, and a hole (not shown) at the lower end for supporting the axle 41.

[0133] A rotating shaft 32, rotatably mounted on the caster wheel rotating member 25, passes through the hole 37. The rotating shaft 32 passes through both the hole 27 in the caster wheel rotating member 25 and the hole 37 in the arm member 30, thereby rotatably connecting the arm member 30 to the caster wheel rotating member 25. Figure 3 As shown, the elongated hole 33 is provided on a straight line (represented by a two-point chain line) connecting the rotating shaft 32 and the axle 41 of the wheel 40. The elongated hole 33 functions as a guide portion for guiding the movement of the locking member 70, which will be described later. In this embodiment, the elongated hole 33 is penetrated by the locking member 70, but it is acceptable if the elongated hole 33 can guide the movement of the locking member 70, or it could be, for example, a long groove. Furthermore, in this embodiment, the elongated hole 33 is provided at approximately the center of the arm body portion 31, but it is acceptable if it is provided at least along a straight line connecting the rotating shaft 32 and the axle 41 of the wheel 40.

[0134] like Figure 2 As shown, the arm holding portion 34 holds a pair of arm body portions 31 at intervals in the width direction. Due to the arrangement of the arm holding portion 34, when viewed from the traveling direction, the arm member 30 is formed in a downward-facing U-shape. Figure 3 As shown, when viewed in cross-section, the arm holding part 34 has a generally L-shaped base part 34a. The corners of the base part 34a are aligned with the rotation axis 32. An elastomer 35, for example, made of synthetic resin rubber, is disposed on the base part 34a.

[0135] The elastic body 35 is disposed between the foot 11 and the arm member 30, and more specifically, between the caster wheel rotating member 25 and the base portion 34a of the arm member 30. The surface of the elastic body 35 that abuts against the base portion 34a is a flat surface, while the surface of the elastic body 35 that abuts against the lower end of the caster wheel rotating member 25 is an arc surface. The elastic body 35 is an arm-pushing mechanism that pushes the lower ends of the pair of arm members 30 toward the ground. In other words, the elastic body 35 is an arm-pushing mechanism that pushes the upper ends of the pair of arm members 30 away from the ground. The upper end of the arm member 30 is the side away from the ground, and is the side where the rotating shaft 32 is located. The elastic body 35 also functions as an impact-absorbing member that absorbs impacts caused by loads, step differences, etc., borne by the main frame 10.

[0136] The wheel 40 includes: an axle 41; a tire portion 42 that rotates about the axle 41; a wheel portion 43 that holds the inner circumference of the tire portion 42; and a plurality of locking recesses 44 provided along the inner circumference of the tire portion 42. In this embodiment, the locking recesses 44 are formed, for example, by ribs. A plurality of locking recesses 44 extend radially about the axle 41. When the locking pin 72 of the locking member 70 (described later) is located in a locking recess 44 between adjacent ribs, the wheel 40 is prevented from rotating and is in a braking state. A braking mechanism 50 is provided for this mechanism used to prevent the wheel 40 from rotating and to achieve a braking state.

[0137] The following details an example of a braking mechanism 50 used in a stroller 1.

[0138] <Implementation Method 1>

[0139] Further reference Figure 4 The structure and operation of the braking mechanism in this embodiment will be explained in detail. Figure 4 Section (A) displays the status of the operating components during walking. Figure 4 Section (B) shows the status of the operating components when braking.

[0140] The braking mechanism 50 is configured to perform braking operations without interfering with the rotational movement of the pair of arm members 30, and to maintain the braking state. In particular, as... Figure 1 As shown, the braking mechanism 50 is used to brake a pair of wheels 40. In its general configuration, it includes: an operating member 60, a pair of locking members 70, and a connecting member 80 connecting the pair of locking members 70. The braking mechanism 50 is configured as a so-called single-operation brake that can brake a pair of wheels 40 simultaneously by operating the operating member 60. The various components are described in detail below.

[0141] (Regarding operating components)

[0142] The operating member 60 is used to move a pair of locking members 70 from an engaged position to an unlocked position; braking can be achieved with a single operation of the operating member 60. The operating member 60 is connected to the connecting member 80, and the operation of the operating member 60 actuates the connecting member 80, thereby moving the pair of locking members 70 from an unlocked position to an engaged position. The connection between the operating member 60 and the connecting member 80 can employ an existing structure.

[0143] like Figure 4 As shown, by operating the operating member 60, the stroller 1 can be switched between a braking state and a walking state. Typically, the operating member 60 has a user operating section 62 that can be switched between the two positions. The user operating section 62 can have various structures, but in this embodiment it is formed as a flat plate and is an elongated shape that extends rearward from the horizontal frame member 12. The user operating section 62 is connected to a generally cylindrical holding section 61 and is rotatably connected to the horizontal frame member 12 via the holding section 61.

[0144] like Figure 4 As shown in section (A), when the operating member 60 is configured approximately horizontally on the horizontal frame member 12, the stroller 1 is in a walking state. Figure 4 As shown in section (B), when the operating member 60 is positioned on the rear side of the cross frame member 12 and tilted at approximately 45 degrees from an approximately horizontal position, the stroller 1 is in a braking state.

[0145] Because the user control unit 62 protrudes rearward from the horizontal frame member 12, when braking the stroller 1, the user can press down on the top of the user control unit 62 with their foot or the like to change the posture of the user control unit 62 to a second posture. Conversely, when releasing the braking state, the user can lift the back of the user control unit 62 with their foot or the like to change the posture of the user control unit 62 to a first posture.

[0146] (Regarding a pair of locking components)

[0147] A pair of locking members 70 are configured to stop the rotation of each of the pair of wheels 40, and to move between an engaged position where the pair of wheels 40 are engaged and an unengaged position where the pair of wheels 40 are not engaged. Figure 2 As shown, the locking member 70 has: a pair of locking bodies 71; a locking pin 72, which is received in the elongated hole 33 of the arm member 30; a pair of guide pins 74, which protrude from the lower ends of the pair of locking bodies 71 toward both sides in the width direction; and a shaft portion 73, which connects the upper ends of the pair of locking bodies 71.

[0148] A pair of locking bodies 71 are rod-shaped members extending vertically, located between the arm member 30 and the wheel 40, respectively. A locking pin 72 is provided only on one side of the locking body 71. Figure 2The locking body 71 is located only at the lower end of the left side of the paper and protrudes toward the locking recess 44 of the wheel 40. A pair of guide pins 74 are respectively located at the lower ends of the pair of locking bodies 71 and pass through the elongated holes 33 of the pair of arm members 30. Accordingly, the locking member 70 can only move along the extending direction of the elongated holes 33 of the arm member 30. In addition, the pair of guide pins 74 and the locking pin 72 are arranged coaxially.

[0149] Here, the locking pin 72 is provided only on one side of the pair of locking bodies 71, but it may also be provided on both sides of the pair of locking bodies 71. Furthermore, in the above embodiment, the locking pin 72 and the guide pin 74 are described as being coaxially mounted but with separate locking pins 72 and 74. However, the locking pin 72 may also function as the guide pin 74. That is, the locking pin 72 can also be guided by the elongated hole 33.

[0150] A shaft 73 is provided at the upper end of a pair of locking bodies 71, fixing the pair of locking bodies 71 in place. Therefore, the pair of locking bodies 71 can always perform the same action. Figure 2 As shown, the extending direction of the shaft portion 73 is substantially parallel to the extending directions of the locking pin 72 and the guide pin 74. Furthermore, the extending direction of the shaft portion 73 of the locking member 70 is substantially parallel to the extending direction of the rotation axis 32 of the arm member 30. The shaft portion 73 is connected to the driven member 90 (described later) and is displaced in conjunction with the movement of the driven member 90. The driven member 90 will be explained later.

[0151] (Regarding connecting structural components)

[0152] Connecting structural member 80 connects operating member 60 to a pair of locking members 70. For example... Figure 1 As shown, connecting member 80a is connected at one end to operating member 60, through the rotation axis La within cross member 12 and through the universal wheel mechanism 20a, and indirectly connected at the other end to locking member 70 of wheel 40a. Connecting member 80b is connected at one end to operating member 60, through the rotation axis Lb within cross member 12 and through the universal wheel mechanism 20b, and indirectly connected at the other end to locking member 70 of wheel 40b. Figure 4 Part (A) to Figure 4 As shown in part (B), by operating the linkage components 80a and 80b of the operating component 60, the locking component 70 is displaced from the non-engaged position to the engaged position.

[0153] Here, to distinguish the left and right sides of the connecting member 80 and the rotation axis L, the one located on the right side when viewed from the rear side is referred to as connecting member 80a and rotation axis La, and the one located on the left side when viewed from the rear side is referred to as connecting member 80b and rotation axis Lb. When there is no need to distinguish left and right, it is simply referred to as connecting member 80 and rotation axis L. Furthermore, the connecting member 80 can be a member that connects the operating member 60 and the locking member 70, or it can be a member that connects the locking member 70 to each other via the operating member 60.

[0154] The connecting member 80 is composed of multiple components, specifically including: a long strip member 81, a pair of movable members 84, and a pair of driven members 90.

[0155] The elongated member 81, connecting the operating member 60 and each of the pair of moving members 84, is a slender member extending along its long side. In this embodiment, the elongated member 81 is composed of two wires, but it can also be composed of a single wire. Figure 3 As shown, the elongated member 81 includes: an outer wire 82; and an inner wire 83 disposed within the outer wire 82. The outer wire 82 is fixed to both the crossbeam 12 and the wire holder 24. The inner wire 83 is configured to move within the outer wire 82. The other end of the inner wire 83 is fixed to a moving member 84. The elongated member 81 is traversed by a rotation axis L.

[0156] The movable component 84 moves via the operation of the operating component 60. For example... Figure 3 As shown, the movable member 84 is connected to the wire fixing part 85 located at the lower end of the long strip member 81. The movable member 84 is movably disposed within the universal wheel axle 26 and has a pair of protrusions 86 protruding upward from the wire fixing part 85 for guiding movement. Further below the wire fixing part 85 is an engaging part 87 that engages with the rotating member 91 described later. The outer peripheral surface of the engaging part 87 has protrusions and recesses to allow the rotating member 91 to rotate.

[0157] The second spring-loaded member 88 is, for example, a spring, typically a compression wire spring. The second spring-loaded member 88 is disposed between the wire retainer 24 and the moving member 84. Specifically, the upper end of the second spring-loaded member 88 abuts against the wire retainer 24, and the lower end abuts against the wire fixing portion 85 of the moving member 84. Accordingly, the second spring-loaded member 88 pushes the moving member 84 downwards and pushes the locking member 70 toward the non-engaged position.

[0158] The driven member 90 follows the movement of a pair of movable members 84. That is, if the movable member 84 moves upward, the driven member 90 also moves upward; if the movable member 84 moves downward, the driven member 90 also moves downward. The driven member 90 is configured to rotate relative to the movable member 84. Accordingly, even when the caster wheel rotation member 25 rotates relative to the caster wheel holding member 21, the movable member 84 will not rotate; only the driven member 90 rotates relative to the movable member 84, thus preventing wire kinking.

[0159] The driven member 90 of this embodiment is composed of multiple members, including, for example: a rotating member 91, configured to rotate relative to the moving member 84; a vertical moving member 95, configured to rotate together with the rotating member 91 and move vertically relative to the rotating member 91; and a first push member 99, which pushes the vertical moving member 95 upward relative to the rotating member 91.

[0160] like Figure 3 As shown, the upper end of the rotating member 91 is provided with a locking portion 92, which is rotatably locked into the locking portion 87 of the moving member 84. The locking portion 92 is formed in a concave-convex shape and is rotatably locked into the concave-convex shape of the locking portion 87. Furthermore, the rotating member 91 has: a longitudinal portion 93 extending downward from the locking portion 92; and a lower transverse portion 94 protruding laterally from the lower end of the longitudinal portion 93. Figure 2 As shown, an opening that opens in the horizontal direction is formed by the vertical portion 93 and the lower horizontal portion 94.

[0161] The lower end of the moving member 95 is provided with a support portion 98 that supports the shaft portion 73 of the locking member 70. Furthermore, the moving member 95 has: a longitudinal portion 97 extending upward from the support portion 98; and an upper transverse portion 96 protruding laterally from the upper end of the longitudinal portion 97. Figure 2 As shown, an opening in the horizontal direction is formed by the vertical portion 97 and the upper horizontal portion 96. The vertical moving member 95 is configured to rotate together with the rotating member 91 and can move vertically relative to the rotating member 91.

[0162] like Figure 3 As shown, a first push member 99 is disposed in the space formed by the opening of the rotating member 91 and the opening of the moving member 95 facing each other. The first push member 99 is, for example, a spring, typically a compressed wire spring. The upper end of the first push member 99 abuts against the upper horizontal portion 96 of the moving member 95, and the lower end abuts against the lower horizontal portion 94 of the rotating member 91. Accordingly, the first push member 99 pushes the moving member 95 upward relative to the rotating member 91, and pushes the locking member 70 toward the engaging position.

[0163] Thus, as Figure 3As shown, within the omnidirectional wheel axle 26, a second push member 88, a moving member 84, and a driven member 90 (rotating member 91, up-and-down moving member 95, and first push member 99) are arranged sequentially from top to bottom. The moving member 84, the second push member 88, the rotating member (rotating member 91, up-and-down moving member 95), and the first push member 99 pass through the rotation axis L.

[0164] (Regarding other components)

[0165] Reference Figure 3 To illustrate the structure around the braking mechanism 50.

[0166] As described above, in the caster wheel mechanism 20, the caster wheel rotating member 25 is configured to rotate relative to the caster wheel retaining member 21, but a caster wheel locking member 23 is provided to control its rotation. The caster wheel locking member 23 is located within the caster wheel retaining member 21 at a position adjacent to the caster wheel axle 26, that is, at a position offset from the rotation axis L.

[0167] When the caster wheel locking member 23 is in a state that allows the caster wheel to rotate around the rotation axis, it is located in... Figure 3 The upper position shown is the lower position within the caster wheel rotation member 25 (not shown) when the caster wheel is prevented from rotating around its rotation axis. The caster wheel locking member 23 is connected to one end of the cable 22, and the other end of the cable 22 is connected to an operating part for locking the caster wheel, such as a push rod, located at any point. By operating the operating part, rotation can be prevented or permitted via the caster wheel locking member 23. The caster wheel locking member 23 can utilize existing methods employed to date.

[0168] (Regarding the action)

[0169] Reference Figures 5 to 7 The operation of the braking mechanism 50 in this embodiment will be explained. Figure 5 To display the diagram showing the transition from walking to braking, Figure 6 This diagram illustrates the load-bearing state of the main frame during movement. Figure 7 This diagram illustrates the load-bearing state of the main frame under braking conditions.

[0170] First, refer to Figure 5 This explains the action of transitioning from a walking state to a braking state. Figure 5 Part (A) shows the walking state, and also shows the walking state where the locking pin 72 of the locking member 70 has disengaged from the locking recess 44 of the wheel 40. To switch from this state to the braking state, press down with your foot or the like. Figure 4 The operating component 60 shown in part (A) becomes Figure 4 As shown in section (B), the linkage component 80 is activated. Accordingly, as Figure 5As shown in section (B), the inner wire 83 is pulled up. Since the inner wire 83 is fixed to the moving member 84, the moving member 84 moves upward against the spring force of the second spring-pushing member 88. In addition, since the moving member 84 is rotatably and vertically connected to the rotating member 91, the rotating member 91 moves upward together with the moving member 84.

[0171] Since the moving member 95 is movably connected to the rotating member 91, it should move upwards along with the rotating member 91 as it moves upwards. However, the moving member 95 is connected to the locking member 70 via the shaft 73, as... Figure 5 As shown, when the locking pin 72 of the locking member 70 abuts against the front end of the rib of the locking recess 44, the locking member 70 cannot move further upward from its position. Therefore, the up-and-down moving member 95 connected to the locking member 70 remains below, following the position of the locking member 70. The rotating member 91 moves upward along with the inner wire 83, while the up-and-down moving member 95 remains below because the locking pin 72 abuts against the front end of the rib of the locking recess 44. Therefore, the first pushing member 99, which pushes the up-and-down moving member 95 upward, is in a compressed state, keeping the up-and-down moving member 95 in an upward-pushing state.

[0172] For example, wheel 40 from Figure 5 When rotated as shown in part (B), the positional relationship between the locking recess 44 and the locking pin 72 changes. As described above, since the moving member 95 is being pushed upwards by the first push member 99, when the positional relationship between the locking recess 44 and the locking pin 72 changes, the recess of the locking recess 44 and the locking pin 72 become opposite to each other, and the obstacle to the upward movement of the moving member 95 disappears. Therefore, as... Figure 5 As shown in part (C), the moving member 95 moves upward by the spring force of the first spring push member 99, causing the locking pin 72 to be inserted into the locking recess 44, thus becoming a braking state.

[0173] Here, walking state ( Figure 5 (Part A) and the intermediate state between the walking state and the braking state. Figure 5 In part (B), the positional relationship between the rotating member 91 of the driven member 90 and the upper and lower moving members 95 is different. Figure 5 In the walking state shown in part (A), the lower horizontal portion 94 of the rotating member 91 is completely separated from the upper horizontal portion 96 of the moving member 95, and the first spring-pushing member 99 is in an extended state. In contrast, Figure 5In the intermediate state between the walking state and the braking state shown in part (B), compared to the walking state, the lower horizontal portion 94 of the rotating member 91 is closer to the upper horizontal portion 96 of the moving member 95, and the first push member 99 is in a retracted state. That is, even in the intermediate state between the walking state and the braking state, the first push member 99 remains in the state of pushing the locking member 70 to the engaging position.

[0174] In the braking mechanism 50 of this embodiment, since a first spring-pushing member 99 is provided between the rotating member 91 and the up-and-down moving member 95, therefore... Figure 5 As shown in part (B), even if the positional relationship between the locking recess 44 of the wheel 40 and the locking pin 72 is misaligned and braking is impossible, the operating force of the operating member 60 will be transmitted to the locking member 70 through multiple members rather than directly to the locking member 70. Therefore, the situation of difficulty in braking can be avoided and the failure of the members constituting the braking mechanism 50 can be prevented.

[0175] Next, refer to Figure 6 This is to illustrate the action of the foot 11 under load during walking. Figure 6 Section (A) displays the walking status. Figure 6 Section (B) shows the state of the main frame when it is under load. Figure 6 Part (A) shows the walking state, which shows the state in which the locking pin 72 of the locking member 70 is disengaged from the locking recess 44 of the wheel 40.

[0176] In this state, for example, when the feet 11, etc., bear a load due to the body movements of an infant riding in stroller 1, such as Figure 6 As shown in section (B), the arm member 30 held by the swivel wheel rotating member 25 rotates around the rotating shaft 32. The elastic body 35 abuts against the underside of the swivel wheel rotating member 25, and the tilt angle of the arm member 30 relative to the road surface R decreases. Simultaneously, because the swivel wheel mechanism 20 is close to the wheel 40, the guide pin 74 moves slightly downward along the elongated hole 33. The elastic body 35 pushes upwards towards the upper end of the arm member 30 away from the ground, that is, towards the direction where the tilt angle of the arm member 30 relative to the road surface R increases. Therefore, when the foot 11 and other parts are no longer under load, the arm member 30 returns to its original position through the elastic force of the elastic body 35. Figure 6 The state shown in part (A).

[0177] Thus, because an elastic body 35 is provided between the arm member 30 and the universal wheel rotating member 25, even when the stroller 1 is under load, the load can be absorbed by the elastic body 35. This action occurs even when there are step differences, for example, and the following... Figure 7 Such situations can also occur.

[0178] Finally, refer to Figure 7This is to illustrate the action of foot 11 under load during braking. Figure 7 Section (A) shows the braking status. Figure 7 Section (B) shows the state of the main frame 10 under load during braking. Figure 7 Part (A) shows the braking state, indicating that the locking pin 72 of the locking member 70 is engaged in the locking recess 44 of the wheel 40. In this braking state, compared to the walking state, the lower horizontal portion 94 of the rotating member 91 is closer to the upper horizontal portion 96 of the up-and-down moving member 95, and the first pushing member 99 that pushes the up-and-down moving member 95 upward is in a compressed state, thus maintaining the up-and-down moving member 95 in an upward-pushing state.

[0179] In this state, for example, when the feet 11, etc., bear a load due to the body movements of an infant riding in stroller 1, such as Figure 7 As shown in section (B), the arm member 30 held by the omnidirectional wheel rotating member 25 rotates around the rotating shaft 32, and the elastic body 35 abuts against the underside of the omnidirectional wheel rotating member 25, causing the tilt angle of the arm member 30 relative to the road surface R to decrease. Furthermore, the positional relationship between the rotating shaft 32 and the shaft portion 73 changes. Specifically, the height difference between the rotating shaft 32 and the shaft portion 73 increases from L1 to L2 (L2 > L1), and the shaft portion 73 moves away from the rotating shaft 32. Thus, the positional relationship between the arm member 30 and the locking member 70 changes. In addition, the up-and-down moving member 95 is constantly pushed upwards by the first push member 99, so the shaft portion 73 and the up-and-down moving member 95 move upwards via the first push member 99. That is, with the rotating shaft 32 as a reference, the shaft portion 73 and the up-and-down moving member 95 move upwards via the first push member 99 as the arm member 30 rotates. Therefore, even when the stroller 1 is under load, the locking pin 72 of the locking member 70 can still maintain the braking state of being embedded in the locking recess 44 of the wheel 40.

[0180] Thus, since a first spring-loaded member 99 is provided between the moving member 95 and the rotating member 91, the stroller 1 can maintain its braking state even when it is under load during braking. In addition, since a first spring-loaded member 99 is provided between the moving member 95 and the rotating member 91, the load borne by the stroller 1 can be absorbed by the first spring-loaded member 99.

[0181] (Regarding efficacy)

[0182] Since the pair of arm members 30 are rotatably held at the lower end of the pair of universal wheel rotating members 25 via individual rotating shafts 32, the braking mechanism 50 of this embodiment is not interfered with by the rotational movement of the pair of arm members 30. In addition, even when the stroller 1 is under load and the pair of arm members 30 rotate around the rotating shaft 32, the braking operation can be performed by the operating member 60, and the braking state can be reliably maintained.

[0183] Furthermore, since the guide pin 74 of the locking member 70 moves along the elongated hole 33 provided in the arm member 30, the movement of the locking pin 72 outside the elongated hole 33 can be restricted. In addition, when the stroller 1 is under load, the arm member 30 and the locking member 70 rotate in the same direction, but since the rotating shaft 32 extends substantially parallel to the shaft portion 73, these movements will not cause any problems.

[0184] The driven member 90, connected to the locking member 70, can rotate relative to the moving member 84, connected to the elongated member 81. Therefore, the moving member 84 does not rotate along with the rotation of the universal wheel rotating member 25, thus preventing the wires from kinking. Since the driven member 90 is composed of three members—the rotating member 91, the up-and-down moving member 95, and the first spring-loaded member 99—the main frame 10 can maintain a braking state even when under load. In addition, since the load can be absorbed by the extension, contraction, and compression of the first spring-loaded member 99, the impact on infants and toddlers riding in the stroller can also be reduced.

[0185] Since the elongated member 81 is connected to the rotation axis L of the caster retaining member 21, and the moving member 84, driven member 90 (rotating member 91 and up-down moving member 95), first spring-loaded member 99, and second spring-loaded member 88 of the connecting member 80 are all connected to the rotation axis L of the caster mechanism 20, even if the caster rotating member 25 rotates relative to the caster retaining member 21, kinking of the elongated member 81 can be prevented. Furthermore, since the aforementioned parts are housed within the caster axle 26, disassembly and assembly are easy.

[0186] (Regarding variations)

[0187] In addition, in this embodiment, the driven member 90 is described as being composed of multiple members, including a rotating member 91, an up-down moving member 95, and a first push member 99. However, the driven member 90 may also be integrally formed from the same members. It is possible to set it to a structure that can rotate relative to the moving member 84 and follow the movement of the moving member 84.

[0188] In this embodiment, the arm spring mechanism 35 is an elastic body. However, it can be any component that springs towards the lower end of the arm member 30 towards the ground. It can also be an electrical or mechanical spring mechanism, and is not limited to being made of rubber or other materials as in this embodiment. Furthermore, the position of the arm spring mechanism 35 is not limited to the above embodiment. It can be positioned anywhere between the foot 11 and the arm member 30.

[0189] <Implementation Method 2>

[0190] Reference Figures 8 to 10The structure and operation of the braking mechanism 50A in Embodiment 2 will be explained. The basic structure of the braking mechanism 50A in this embodiment is the same as that of the braking mechanism 50 in Embodiment 1, but the structures of the moving member 84A, rotating member 91A, cooperating member 96A, and locking member 70A, as well as the position through which the elongated member 81 is inserted, are different. Here, components identical to those in the braking mechanism 50 shown in Embodiment 1 are labeled with the same symbols, and only the differences are explained in detail.

[0191] (Regarding each component)

[0192] In this embodiment, the braking mechanism 50A has a long strip member 81 of its connecting member 80A positioned offset from the rotation axis L of the caster mechanism 20. Specifically, the long strip member 81 does not pass through the caster axle 26 of the caster mechanism 20 through the rotation axis L, but rather passes through a position adjacent to the caster axle 26. The long strip member 81 is positioned opposite the caster locking member 23, separated from the caster axle 26.

[0193] The movable member 84A moves in the same way as the movable member 84 in Embodiment 1, through the operation of the operating member 60. For example... Figure 10 As shown, the movable member 84A is connected to the wire fixing portion 85A located at the upper end of the elongated member 81. The movable member 84A is movable up and down and has: a longitudinal portion 86A extending downward from the wire fixing portion 85A; and a lower transverse portion 87A protruding laterally from the lower end of the longitudinal portion 86A. An opening that opens outward in the radial direction is formed by the longitudinal portion 86A and the lower transverse portion 87A.

[0194] The driven member 90A moves in accordance with the movement of the movable member 84A. That is, if the movable member 84A moves upward, the driven member 90A also moves upward; if the movable member 84A moves downward, the driven member 90A also moves downward. In this embodiment, the driven member 90A is composed of multiple members, including, for example, a rotating member 91A, which is configured to rotate relative to the movable member 84A; and a first push member 99.

[0195] like Figure 9 and Figure 10As shown, the rotating member 91A is generally cylindrical and is held between the caster wheel retaining member 21 and the caster wheel rotating member 25 of the caster wheel mechanism 20. Specifically, the rotating member 91A includes: an upper housing 92A that abuts against the caster wheel retaining member 21; a lower housing 93A located below the upper housing 92A; a locking member support portion 94A disposed on a portion of the outer peripheral surface of the lower housing 93A and supporting the locking member 70A; and a ring portion 95A disposed between the lower housing 93A and the caster wheel rotating member 25. The rotating member 91A is fixed to the caster wheel rotating member 25 and rotates together with the caster wheel rotating member 25. Here, the rotating member 91A is described as cylindrical, but the rotating member 91A may also be circumferentially notched; the shape of the rotating member 91A is not limited.

[0196] Especially Figure 10 As shown, the upper housing 92A is configured to abut against the inner circumferential surface of the caster wheel retaining member 21 and is movable vertically. The outer diameter of the lower housing 93A is larger than that of the upper housing 92A, and is approximately the same size as the outer circumferential surface of the caster wheel retaining member 21. A step is provided between the lower housing 93A and the upper housing 92A. The locking member support portion 94A is, for example, a recessed shape, which holds the shaft portion 73 extending in the width direction so that it is rotatable. The upper part of the locking member support portion 94A is covered by the cover portion 101A. The locking member support portion 94A protrudes outward from the outer circumferential surface of the caster wheel retaining member 21. The ring portion 95A connects the lower housing 93A and the caster wheel rotating member 25, and fills the gap between the lower housing 93A and the caster wheel rotating member 25.

[0197] The cooperating member 96A moves up and down together with the rotating member 91A, but does not rotate with the rotating member 91A. The cooperating member 96A has: an upper horizontal portion 97A that protrudes radially inward; a vertical portion 98A that extends downward from the upper horizontal portion 97A; and a lower horizontal portion 99A that protrudes radially outward from the lower end of the vertical portion 98A. Figure 9 As shown, an opening that opens radially inward is formed by the upper horizontal portion 97A and the vertical portion 98A. The lower horizontal portion 99A abuts against the locking member support portion 94A of the rotating member 91A. Accordingly, the cooperating member 96A and the rotating member 91A are configured to move vertically. Here, the cooperating member 96A is formed with a different part than the rotating member 91A, but if it is formed so that it does not rotate relative to the rotating member 91A, it can also be formed with the same part.

[0198] The first push member 99 is disposed in the space formed by the opening of the moving member 84A and the opening of the cooperating member 96A facing each other. The upper end of the first push member 99 abuts against the upper horizontal portion 97A of the cooperating member 96A, and the lower end abuts against the lower horizontal portion 87A of the moving member 84A. Accordingly, the first push member 99 pushes the rotating member 91A upward relative to the moving member 84A, and pushes the locking member 70A toward the engaging position.

[0199] Thus, at a position adjacent to the universal wheel axle 26, which is a position different from the rotation axis L, the second push member 88, the moving member 84A, and the driven member (rotating member 91A, first push member 99, and cooperating member 96A) are arranged sequentially from above.

[0200] like Figure 9 As shown, the locking member 70A has a locking pin 72A at the front end of the locking body 71 on one side, and a locking guide 74A at the front end of the locking body 71 on the other side. The protruding length of the locking pin 72A is greater than that of the locking guide 74A, and it serves both locking and guiding functions. Specifically, the locking pin 72A has a length that passes through the elongated hole 33 and reaches the locking recess 44 of the wheel 40. The shaft portion 73 of the locking member 70A is located at a position offset from the rotation axis L, and is located at a position that protrudes from the outer peripheral surface of the caster wheel retaining member 21.

[0201] (Regarding the action)

[0202] Reference Figures 11 to 13 The operation of the braking mechanism 50A in this embodiment will be explained. Figure 11 To display the diagram showing the transition from walking to braking, Figure 12 This diagram illustrates the load-bearing state of the main frame during movement. Figure 13 This diagram illustrates the load-bearing state of the main frame under braking conditions.

[0203] First, refer to Figure 11 This explains the action of transitioning from a walking state to a braking state. Figure 11 Part (A) shows the walking state and the state in which the locking pin 72A of the locking member 70A is disengaged from the locking recess 44 of the wheel 40. To switch from this state to the braking state, press down with your foot or the like. Figure 4 The operating component 60 shown in part (A) becomes Figure 4 As shown in section (B), the linkage component 80 is activated. Accordingly, as Figure 11As shown in section (B), the inner wire 83 is pulled up. Since the inner wire 83 is fixed to the moving member 84A, the moving member 84A moves upward against the spring force of the second spring-pushing member 88. In addition, since the moving member 84A is rotatably and vertically connected to the rotating member 91A, the rotating member 91A moves upward together with the moving member 84A.

[0204] The rotating member 91A is connected to the locking member 70A via the shaft 73. For example... Figure 11 As shown, when the locking pin 72A of the locking member 70A abuts against the front end of the rib of the locking recess 44, the locking member 70A cannot move further upward from its position. Therefore, the rotating member 91A connected to the locking member 70A is positioned downward along with the position of the locking member 70A. The moving member 84A moves upward as the inner wire 83 is pulled up. In contrast, the rotating member 91A remains downward because the locking pin 72A abuts against the front end of the rib of the locking recess 44. Therefore, the first push member 99, located between the moving member 84A and the cooperating member 96A and pushing the rotating member 91A upward, is in a compressed state, keeping the rotating member 91A in the upward pushing state at all times.

[0205] For example, wheel 40 from Figure 11 When rotated as shown in part (B), the positional relationship between the locking recess 44 and the locking pin 72A changes. As described above, since the rotating member 91A is in a state where it is pushed upward by the first push member 99, the obstacle to the upward movement of the rotating member 91A disappears when the positional relationship between the locking recess 44 and the locking pin 72A changes. Therefore, as Figure 11 As shown in section (C), the rotating member 91A moves upward by the spring force of the first spring-pushing member 99, causing the locking pin 72A to engage with the locking recess 44, thus entering a braking state. Even when the locking pin 72A is engaged with the locking recess 44, the positional relationship between the rotating member 91A and the moving member 84A is different from that in the traveling state ( Figure 11 The situation differs in part (A). In the walking state, the first push member 99 is in an extended state, while in the braking state, the first push member 99 is in a slightly retracted state.

[0206] In the braking mechanism 50A of this embodiment, since a first spring-pushing member 99 is provided between the moving member 84A and the cooperating member 96A, therefore... Figure 11 As shown in part (B), even if the positional relationship between the locking recess 44 of the wheel 40 and the locking pin 72A is offset and braking is impossible, the operating force of the operating member 60 will be transmitted through the first push member 99 instead of directly to the locking member 70A, thus preventing malfunction of the components constituting the braking mechanism 50A.

[0207] Next, refer to Figure 12 This explains the operation of the braking mechanism 50A when the main frame 10 is under load during the walking state. Figure 12 In the state shown in part (A), for example, when the feet 11, etc., are subjected to load due to the body movements of an infant riding in stroller 1, such as Figure 12 As shown in section (B), the arm member 30 held by the swivel wheel rotating member 25 rotates around the rotating shaft 32. The elastic body 35 abuts against the underside of the swivel wheel rotating member 25, and the tilt angle of the arm member 30 relative to the road surface R decreases. The elastic body 35 pushes towards the front end of the arm member 30 closer to the ground, that is, the pushing becomes... Figure 12 The tilt angle of the arm member 30 is shown in section (A). Therefore, if the load disappears, the arm member 30 will return to its original position through the elastic force of the elastic body 35. Figure 12 The state shown in part (A).

[0208] Thus, since an elastic body 35 is provided between the arm member 30 and the universal wheel rotating member 25, the elastic body 35 can absorb the load when the stroller 1 is under load. This action occurs even when there are step differences, and the following... Figure 13 Such situations can also occur.

[0209] Finally, refer to Figure 13 This explains the operation of the braking mechanism 50A when the main frame 10 is under load during braking. Figure 13 In the state shown in part (A), for example, when the feet 11, etc., are subjected to load due to the body movements of an infant riding in stroller 1, such as Figure 13 As shown in section (B), the arm member 30 held by the universal wheel rotating member 25 rotates around the rotating shaft 32, and the elastic body 35 abuts against the underside of the universal wheel rotating member 25, reducing the tilt angle of the arm member 30 relative to the road surface R. Furthermore, the positional relationship between the rotating shaft 32 and the shaft portion 73 changes, increasing the height difference between them from L1 to L2 (L2 > L1), and the shaft portion 73 moves away from the rotating shaft 32. In addition, the rotating member 91A is constantly pushed upwards by the first push member 99, so the shaft portion 73 and the rotating member 91A move upwards via the first push member 99. That is, with the rotating shaft 32 as a reference, the shaft portion 73 and the rotating member 91A move upwards via the first push member 99 as the arm member 30 rotates. Therefore, even when the stroller 1 is under load, the locking pin 72A of the locking member 70 can still maintain the braking state of being embedded in the locking recess 44 of the wheel 40.

[0210] Thus, since the first spring-pushing member 99 is provided between the moving member 84A and the cooperating member 96A, the stroller 1 can maintain its braking state even when it is under load during braking. In addition, the first spring-pushing member 99 can also absorb the load during braking.

[0211] (Regarding efficacy)

[0212] Since the pair of arm members 30 are kept rotatable via the rotation shaft 32 at the lower end of the universal wheel rotation member 25, the braking mechanism 50A of this embodiment is not interfered with by the rotational movement of the pair of arm members 30. In addition, even when the stroller 1 is under load and the pair of arm members 30 rotate around the rotation shaft 32, the braking operation can be performed by the operating member 60, and the braking state can be reliably maintained.

[0213] In this embodiment, the long strip member 81 is located at a position different from the rotation axis L, but since it is connected to the driven member 90A which is rotatably provided relative to the moving member 84A connected to the inner wire 83, and the driven member 90A is connected to the locking member 70A, the twisting of the long strip member 81 can be prevented.

[0214] In this embodiment, the connecting member 80A is positioned at a different location from the rotation axis L and adjacent to the universal wheel axle 26, thus allowing for the addition of a braking mechanism 50A in a later process. Furthermore, since the rotating member 91A protrudes from the outer peripheral surface of the universal wheel retaining member 21, it can be easily repaired even in the event of a malfunction.

[0215] <Implementation Method 3>

[0216] Reference Figure 14 The structure and operation of the braking mechanism 50B in Embodiment 3 will be explained. The basic configuration of the braking mechanism 50B in this embodiment is the same as that of the braking mechanism 50A in Embodiment 2, but the configurations of the moving member 84B and the rotating member 91B are different. Here, components identical to those in the braking mechanism 50A shown in Embodiment 2 will be labeled with the same symbols, and only the differences will be explained in detail.

[0217] (Regarding each component)

[0218] The braking mechanism 50B in this embodiment is similar to the moving member 84A in embodiment 1, via the operating member 60 (see reference). Figure 4 Moved by the operation of ). Figure 14 As shown in part (A), the upper end of the movable member 84B is connected to the end of the elongated member 81. The movable member 84B is movable up and down and includes: a wire fixing part 85B for connecting to the end of the elongated member 81; and a groove 86B for holding the rotating member 91B in a rotatable position. The groove 86B is located on the outer side in the radial direction.

[0219] The rotating member 91B has a substantially the same shape as the rotating member 91A in Embodiment 2, but the upper housing 92B is held in the groove 86B of the moving member 84B. Accordingly, the rotating member 91B moves up and down with the up and down movement of the moving member 84B, and rotates relative to the moving member 84B with the rotation of the universal wheel rotating member 25.

[0220] The interior of the lower cylinder 93B has a storage space for the shaft portion 73 of the locking member 70A and the first push member 99. The first push member 99 supports the shaft portion 73 from below and pushes the shaft portion 73 upward to the engaging position.

[0221] (Regarding the action)

[0222] Reference Figure 14 Part (A) and Figure 14 The operation of the braking mechanism 50B in Embodiment 3 from the walking state to the braking state will be explained in part (B). Figure 14 Part (A) shows the walking state and the state in which the locking pin 72A of the locking member 70A is disengaged from the locking recess 44 of the wheel 40. To switch from this state to the braking state, press down with your foot or the like. Figure 4 The operating component 60 shown in part (A) becomes Figure 4 As shown in section (B), the linkage component 80 is activated. Accordingly, as Figure 14 As shown in section (B), the inner wire 83 is pulled up. Since the inner wire 83 is fixed to the moving member 84B, the moving member 84B moves upward against the spring force of the second spring-pushing member 88. In addition, since the rotating member 91B is configured to move up and down together with the moving member 84B and can rotate relative to the moving member 84B, the rotating member 91B moves upward together with the moving member 84B.

[0223] The rotating member 91B holds the shaft portion 73 of the locking member 70A. Figure 14 Part (B) shows the locking pin 72A of the locking member 70A abutting against the front end of the rib of the locking recess 44. In this state, the locking member 70A cannot move further upward from its position, so the first push member 99 is compressed by the shaft portion 73 of the locking member 70A.

[0224] For example, wheel 40 from Figure 14When rotated as shown in part (B), the positional relationship between the locking recess 44 and the locking pin 72A changes. As described above, since the shaft portion 73 of the locking member 70A is pushed upward by the first push member 99, when the positional relationship between the locking recess 44 and the locking pin 72A changes, the shaft portion 73 of the locking member 70A moves upward by the pushing force of the first push member 99, and the locking pin 72A engages with the locking recess 44, thus entering a braking state. Here, the operation of the main frame 10 under load is the same as that of the braking mechanism 50A in Embodiment 2.

[0225] <Regarding common variations among multiple implementation methods>

[0226] In all the embodiments described above, the wheels of a caster wheel have been used as examples, but wheels that do not rotate around the axis of rotation may also be used. Furthermore, in all the embodiments described above, a single-wheel configuration has been used as an example, but a double-wheel configuration with two wheels relative to one caster wheel mechanism 20 may also be used; the number of wheels is not limited. Moreover, even when multiple wheels are provided, the arm members 30 can be positioned at both ends of the multiple wheels in the width direction for clamping.

[0227] In all the above embodiments, the arm member 30 is described as being held in the form of a pair of universal wheel rotating members 25 of the universal wheel mechanism 20. However, it is not necessary to hold it in the pair of universal wheel rotating members 25. For example, it can also be held in the lower end of the foot 11 via other members, or at least in the lower end of the pair of feet 11.

[0228] In all the above embodiments, the connecting members 80, 80A, and 80B of the braking mechanisms 50, 50A, and 50B have been described as having a long strip member 81, a pair of moving members 84, 84A, and 84B, and a pair of driven members 90, 90A, and 90B. However, the connecting members 80, 80A, and 80B can be connected to the operating member 60 and the pair of locking members 70 and 70A. For example, the operating member 60 and the pair of locking members 70 and 70A can be connected by wires or the like.

[0229] In addition, the above embodiments are provided with two spring-pushing components 88 and 99, but the braking mechanisms 50, 50A and 50B do not necessarily need to be provided with two spring-pushing components 88 and 99, but can be selected according to the required accuracy of the braking mechanism.

[0230] In Embodiment 1, the connecting member 80 of the braking mechanism 50 passes through the rotation axis L. In Embodiments 2 and 3, the connecting members 80A and 80B of the braking mechanisms 50A and 50B pass through positions different from the rotation axis L. However, the braking mechanism 50 can also pass through positions different from the rotation axis L, and the braking mechanisms 50A and 50B can also pass through the rotation axis L.

[0231] Furthermore, in all the embodiments described above, the locking member 70 is described as a rod-shaped member extending vertically, but other members may also be placed between the locking pins 72, 72A and the shaft portion 73. In addition, the locking recess 44 of the wheel 40 is described above as being arranged radially along the inner circumference of the tire portion 42, but it may also be provided on the side of the axle 41, or it may be a hole portion. The shape and locking direction of the locking recess 44 and the locking member 70 are not limited.

[0232] In Embodiment 2, the driven member is described in the form of a rotating member 91A, a first push member 99 and a cooperating member 96A. However, it is not necessary for all components of the driven member to be rotatable relative to the moving member 84A. Alternatively, some components may be fixed relative to the moving member 84A and not rotate.

[0233] This specification describes several embodiments, but individual components of each embodiment can be extracted and combined.

[0234] The embodiments of the present invention have been described above with reference to the figures, but the present invention is not limited to the embodiments shown in the figures. Various modifications and variations can be made to the embodiments shown in the figures within the same or equivalent scope as the present invention.

Claims

1. A childcare device equipped with wheels, comprising: The body frame includes a pair of legs that are separated from each other in the width direction; The caster wheel mechanism includes a pair of caster wheel retaining members and a pair of caster wheel rotating members. The pair of caster wheel retaining members are located at the lower ends of the pair of feet. The pair of caster wheel rotating members are held by the pair of caster wheel retaining members so that they can rotate about a rotation axis extending in the vertical direction, and support a pair of wheels, allowing the wheels to rotate. A braking mechanism comprising: a pair of locking members configured to stop the rotation of the pair of wheels and to displace between an engaged position in which the wheels are engaged and a disengaged position in which the wheels are not engaged; an operating member that operates the pair of locking members from the disengaged position to the engaged position; and a connecting member that connects the operating member to the locking members. The aforementioned connecting structural components have: A pair of movable components that move through the operation of the aforementioned operating components; A long strip member connecting the aforementioned operating member and the aforementioned moving member; and A pair of driven members, configured to rotate relative to the aforementioned movable member and follow the movement of the aforementioned movable member; The aforementioned locking member is connected to the aforementioned driven member and is configured to move in conjunction with the movement of the aforementioned driven member, and to displace between the aforementioned engaged position and the aforementioned unengaged position.

2. The childcare device with wheels according to claim 1, wherein, The aforementioned driven member has: A rotating member, configured to rotate relative to the aforementioned movable member; The vertically movable component is configured to move vertically together with the aforementioned rotating component; and The first pusher component pushes the aforementioned up-and-down moving component upward relative to the aforementioned rotating component.

3. The childcare device with wheels according to claim 1, wherein, The aforementioned driven member has: A rotating member having a locking member support portion that supports the shaft portion of the aforementioned locking member, and configured to rotate relative to the aforementioned moving member; and The first pusher pushes the aforementioned locking member toward the aforementioned engaging position.

4. The childcare appliance with wheels according to any one of claims 1 to 3, wherein, The aforementioned elongated component passes through the rotation axis of the aforementioned universal wheel mechanism.

5. The childcare appliance with wheels according to any one of claims 1 to 3, wherein, The aforementioned connecting member also has a pair of second spring-pushing members, which are used to spring the aforementioned pair of moving members and push the aforementioned pair of locking members toward the non-engaged position.

6. The childcare device with wheels according to claim 1, wherein, The aforementioned locking member has: The locking pin, relative to the aforementioned wheel, is displaced between the aforementioned engaged position and the aforementioned disengaged position; and The shaft extends along the long side from the aforementioned locking pin and is rotatable for the aforementioned driven member.

7. The childcare device with wheels according to claim 6, wherein, The shafts of the aforementioned moving member, the aforementioned driven member, and the aforementioned locking member are connected to the rotation axis of the aforementioned universal wheel mechanism.

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