Child seats and bicycles

Abstract

To improve the transportability of child seats and the ease of attaching them to the bicycle frame. [Solution] The child seat 1 comprises a seat body 2 that is attached to the bicycle frame 90. The seat body 2 includes a seat portion 3 on which the child sits, a back portion 4 integrally formed with the seat portion 3 to support the child's back, and leg portions 5 separately formed from the seat portion 3 and back portion 4 to support the child's legs. The seat portion 3 includes a shaft portion 32 provided for attaching the seat portion 3 to the leg portions 5. The leg portions 5 include a bearing portion 53 provided to rotatably support the shaft portion 32.

Description

Technical Field

[0001] The present disclosure relates to a child seat for bicycles and a bicycle provided with the same. Background Art

[0002] Patent Document 1 discloses a child seat fixed to a carrier of a bicycle body. This child seat integrally includes a seat portion on which a child sits, a back portion that supports the child's back, and a leg portion that supports the child's feet. Prior Art Literature Patent Literature

[0003] Patent Document 1 Japanese Unexamined Patent Application Publication No. 2018-47852 Summary of the Invention Problem to be Solved by the Invention

[0004] In the above-mentioned conventional technique, the seat portion, the back portion, and the leg portion of the child seat are integrally formed, so that when the child seat is transported, a large transport space is required, which causes a problem that transportability is not good. In addition, the above conventional technique has a problem that the work of attaching the child seat after transportation to the bicycle body is not easy.

[0005] The problem to be solved by the present disclosure is to improve the transportability of the child seat and improve the ease of attaching the child seat to the bicycle body. Means for Solving the Problem

[0006] A child seat according to one aspect of the present disclosure is a child seat comprising a seat body that is attached to a bicycle frame. The seat body includes a seat portion configured for a child to sit facing forward, a back portion integrally formed with the seat portion to support the back of a child seated on the seat portion, and leg portions separately formed from the seat portion and the back portion to support the legs of a child seated on the seat portion. The seat portion includes a shaft portion provided for attaching the seat portion to the leg portion. The leg portion includes a bearing portion provided to rotatably support the shaft portion.

[0007] A bicycle according to one aspect of this disclosure comprises the child seat and the bicycle body to which the seat body of the child seat is attached. [Effects of the Invention]

[0008] This disclosure has the effect of improving the transportability of child seats and improving the ease of attaching child seats to bicycle frames. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a side view of a bicycle equipped with a child seat according to one embodiment. [Figure 2] Figure 2 is an exploded perspective view of the main components of the child car seat shown above. [Figure 3] Figure 3 is an enlarged perspective view of the main part of Figure 2. [Figure 4] Figure 4 is an enlarged perspective view of another key part of Figure 2. [Figure 5] Figure 5 is a plan view of the sheet body shown above. [Figure 6] Figure 6 is a cross-sectional view taken along line AA in Figure 5. [Figure 7] Figure 7 is a perspective view of the main parts showing the process of attaching the seat portion to the leg portion of the seat body shown above. [Figure 8] Figure 8 is a cross-sectional view of the main part of the process of attaching the seat portion to the leg portion of the seat body shown above. [Figure 9] FIG. 9 is a perspective view of essential parts of a first modified example of the child seat described above. [Figure 10] FIG. 10 is a cross-sectional view of essential parts of the first modified example of the child seat described above. [Figure 11] FIG. 11 is a perspective view of essential parts of a second modified example of the child seat described above. MODE FOR CARRYING OUT THE INVENTION

[0010] 1. One embodiment A bicycle 9 according to one embodiment will be described with reference to the accompanying drawings.

[0011] In the following description, the front-rear direction is defined based on the traveling direction of the bicycle 9. The direction in which the rider travels when riding the bicycle 9 is the front, and the opposite direction is the rear. When viewed from the rider, the left direction is the left side, and the right direction when viewed from the rider is the right side. The up-down direction is defined when the bicycle 9 is placed on a horizontal surface, and the left-right direction is orthogonal to the up-down direction and the front-rear direction.

[0012] (Bicycle) As shown in FIG. 1, the bicycle 9 of one embodiment includes a bicycle body 90, and a child seat 1 attached to the bicycle body 90.

[0013] The front-rear direction, left-right direction, and up-down direction of the bicycle body 90 match the front-rear direction, left-right direction, and up-down direction of the bicycle 9.

[0014] The front-rear direction, left-right direction, and up-down direction of the child seat 1 are defined based on the state where the child seat 1 is attached to the bicycle body 90, and match the front-rear direction, left-right direction, and up-down direction of the bicycle 9 in this state.

[0015] (Bicycle body) In the bicycle 9 of one embodiment, the bicycle body 90 is an electrically assisted bicycle.

[0016] A bicycle body 90 comprises: a seat tube 91 provided to extend obliquely upward rearward at a central portion in the front-rear direction of the bicycle body 90; a seat stay 92 provided to extend obliquely downward rearward from an upper end of the seat tube 91; a carrier support stay 93 connected to a lower end of the seat stay 92 and provided to extend obliquely upward rearward; a front wheel 94; a rear wheel 95; a drive mechanism 96; and a battery 97.

[0017] A saddle 99 is attached to the seat tube 91 via a seat post 992. The battery 97 is attached to a rear side of the seat tube 91.

[0018] Further, a carrier 98 is attached at a position behind the saddle 99 and above the rear wheel 95. A front end of the carrier 98 is fixed to the seat stay 92, and a rear end of the carrier 98 is fixed to the carrier support stay 93.

[0019] (Child seat) A child seat 1 comprises a seat body 2 attached to the bicycle body 90, and an auxiliary belt 8 connected to the seat body 2. The auxiliary belt 8 is a belt intended to improve the safety of the child seat 1, and is used to suppress falling of the child seat 1 from the bicycle body 90.

[0020] (Seat body) The seat body 2 is a main body portion of the child seat 1. As shown in FIG. 2 and the like, the seat body 2 includes a seat portion 3, a back portion 3 positioned above the seat portion 3, and a leg portion 5 positioned below the seat portion 3.

[0021] In other words, in the vertical direction, the seat portion 3 is positioned between the back portion 4 and the leg portion 5. In the front-rear direction, the back portion 4 is positioned rearward of the leg portion 5.

[0022] (Seat portion) The seat portion 3, which constitutes an intermediate portion in the vertical direction of the seat body 2, is a portion on which a child sits. The seat portion 3 is configured such that a child sits facing forward.

[0023] The seat portion 3 has a main body portion 31 that is wide in the left-right direction to support the child's buttocks, and a protruding portion 36 that projects forward from the main body portion 31. The protruding portion 36 is narrower in the left-right direction than the main body portion 31. The protruding portion 36 projects forward from the middle portion in the left-right direction of the front end of the main body portion 31.

[0024] As shown in Figure 1, the upper side of the main body 31 is covered by the seat cushion member 38. The upper side of the protruding portion 36 is covered by the front cover 39. The upper surface of the front cover 39 is a convex curved surface that bulges upward. The front cover 39 is located in front of the seat cushion member 38.

[0025] As shown in Figure 2, the seat portion 3 has a front end portion 37 that protrudes further forward from the protruding portion 36. The front end portion 37 is the part of the seat portion 3 that protrudes the furthest forward. The front end portion 37 protrudes forward from the middle portion in the left-right direction of the front end of the protruding portion 36. The front end portion 37 is narrower in the left-right direction than the protruding portion 36.

[0026] As shown in Figure 3, the front end portion 37 of the seat portion 3 is provided with a through hole 30 and a shaft portion 32.

[0027] The through-hole 30 is elongated in the left-right direction and penetrates in the up-down direction. The through-hole 30 is a rectangular through-hole that is elongated in the left-right direction. The through-hole 30 has dimensions and a shape that allows the auxiliary belt 8 to be inserted through it.

[0028] The shaft portion 32 is located in front of the through hole 30. The shaft portion 32 is formed at the very front of the front end portion 37. In other words, the shaft portion 32 constitutes the very front part of the seat portion 3.

[0029] The shaft portion 32 is a round bar-shaped part extending in the left-right direction, and is provided for attaching the seat portion 3 to the leg portion 5. The term "round bar-shaped" here is not interpreted in a strict sense, and it is sufficient if it has a shape that can be described as round bar-shaped in the relevant technical field.

[0030] The outer circumferential surface of the shaft portion 32 includes a convex curved surface with a circular arc cross-section (see Figure 6). The cross-section here is perpendicular to the central axis of the shaft portion 32 extending in the left-right direction. The shaft portion 32 is narrower in the left-right direction than the protruding portion 36.

[0031] In addition, the front end portion 37 is provided with a plurality of projections 33 that protrude downward (see Figure 3, etc.). The plurality of projections 33 are two projections 33 that are spaced apart in the left-right direction. Each projection 33 is formed such that the width in the front-rear direction becomes narrower towards the lower part. Each projection 33 is a triangular rib that protrudes downward.

[0032] As shown in Figure 7, the seat portion 3 is further provided with a plurality of downwardly projecting protrusions 61. The plurality of protrusions 61 are provided on the lower surface of the main portion 31. The plurality of protrusions 61 consist of two protrusions 61 spaced apart in the left-right direction. Each protrusion 61 is formed such that the width in the front-back direction becomes narrower towards the lower portion.

[0033] Each projection 61 includes a plurality of ribs 615 extending in the front-rear direction. The plurality of ribs 615 are three ribs 615 arranged with gaps in the left-right direction. The front ends of the three ribs 615 arranged in the left-right direction are continuous with each other. Each rib 615 is formed so that its width in the front-rear direction becomes narrower towards the lower part. Each rib 615 is a trapezoidal rib that protrudes downward.

[0034] (back) As shown in Figure 2, the backrest 4 is integrally constructed with the seat 3 to support the back of a child seated on the seat 3. The backrest 4 includes a backrest portion 41 and a head portion 44.

[0035] The backrest portion 41 extends upward from the rear end of the seat portion 3 (i.e., the rear end of the main body portion 31) to support the back of a child seated on the seat portion 3. A back cushion member 42 is attached to the front of the backrest portion 41 (see Figure 1). A pair of left and right side guards 43 extend from both ends of the backrest portion 41 in the left-right direction to cover both sides of a child seated on the seat portion 3.

[0036] The headrest 44 is positioned above the backrest 41 to support the head of a child seated on the seat 3. A head guard 45 is provided in front of the headrest 44, and is vertically movable to protect the child's head. The head guard 45 is provided with a pair of left and right shoulder belt holes (not shown). A pair of left and right shoulder belts (not shown) are inserted through the respective left and right shoulder belt holes.

[0037] In one embodiment, the child seat 1 is fitted with a seat belt device (not shown). This seat belt device is a five-point seat belt device that includes a pair of shoulder belts to restrain the shoulders of the child seated on the seat 3, a pair of waist belts to restrain the child's waist, a crotch belt that passes between the child's legs, and a buckle.

[0038] A grip bar 48 is attached to the back 4 so as to extend in the left-right direction. The left and right ends of the grip bar 48 are connected to the front edges of the left and right side guards 43, respectively. Both ends of the grip bar 48 are detachable from the left and right side guards 43, respectively.

[0039] (leg) The leg section 5 is constructed separately from the seat section 3 and backrest section 4 to support the feet of a child seated on the seat section 3. The leg section 5 is fixed to the luggage rack 98 of the bicycle frame 90. The seat section 3 and backrest section 4 are fixed to the leg section 5, not to the luggage rack 98.

[0040] As shown in Figure 2, the leg portion 5 includes a connecting base 51 on which the seat portion 3 is placed, and a footrest portion 52 on which the feet of a child seated on the seat portion 3 are placed.

[0041] The connecting base 51 has a shape that extends in the front-rear and left-right directions. With the lower surface of the connecting base 51 in contact with the upper surface of the loading platform 98, the connecting base 51 is fixed to the loading platform 98 using a screw and fixing member (not shown), thereby attaching the legs 5 to the loading platform 98. The fixing member is a member for connecting the legs 5 and the loading platform 98, and is located on the underside of the loading platform 98 and has a screw hole into which the screw is screwed. The connecting base 51 and the loading platform 98 are sandwiched between the head of the screw and the fixing member.

[0042] As shown in Figure 4, the front end portion 517 of the connecting base 51 is provided with a through hole 50 and a bearing portion 53.

[0043] The through-hole 50 is elongated in the left-right direction and penetrates vertically. The through-hole 50 is a rectangular through-hole that is elongated in the left-right direction. The through-hole 50 has a larger opening than the through-hole 30 of the seat portion 3. In both the left-right and front-back directions, the through-hole 50 has a wider opening width than the through-hole 30. The through-hole 50 has dimensions and a shape that allow the front end portion 37 of the seat portion 3 to be inserted from above.

[0044] The bearing portion 53 is located in front of the through hole 50. The bearing portion 53 is composed of a front wall 54. The lower part of the front wall 54 forms the front edge of the through hole 50. The front wall 54 is located at the very front of the front end portion 517; in other words, the front wall 54 constitutes the very front part of the connecting base 51 of the leg portion 5. The bearing portion 53 is provided to rotatably support the shaft portion 32 of the seat portion 3. The rotation of the shaft portion 32 here is rotation around a central axis that extends in the left-right direction.

[0045] As shown in Figure 6, the bearing portion 53 has a concave curved guide surface 533 that guides the rotation of the shaft portion 32 of the seat portion 3. The guide surface 533 includes a lower end surface facing rear, an upper end surface facing downward, and a concave curved surface with a circular arc cross-section that smoothly connects these lower and upper end surfaces.

[0046] As shown in Figure 4, a rib-shaped locking piece 535 extends rearward from the middle of the upper end of the bearing portion 53 in the left-right direction. The locking piece 535 is a rectangular piece that is long in the left-right direction.

[0047] As shown in Figure 2, the footrest section 52 is provided so as to hang down from both the left and right ends of the front half of the connecting base 51. The footrest section 52 includes a pair of left and right footrests 522 configured to accommodate the entire left and right feet of a child. The pair of left and right footrests 522 extend from both the left and right ends of the front half of the connecting base 51. The pair of left and right footrests 522 and the connecting base 51 are integrally constructed.

[0048] As shown in Figure 5, the footrest portion 52 is located behind the bearing portion 53. In other words, the bearing portion 53 is located in front of the footrest portion 52, that is, in front of each of the left and right footrests 522.

[0049] As shown in Figures 2 and 7, the leg portion 5 is further provided with a plurality of engaging portions 62. The plurality of engaging portions 62 are provided in a concave shape on the upper surface of the rear half of the connecting base 51. The plurality of engaging portions 62 are two engaging portions 62 provided at a distance from each other in the left-right direction. Each engaging portion 62 is penetrated vertically, but it may not be penetrated vertically.

[0050] Multiple engaging portions 62 on the leg portion 5 correspond one-to-one with multiple protrusions 61 on the seat portion 3. The multiple protrusions 61 on the seat portion 3 engage with the multiple engaging portions 62 on the leg portion 5, thereby positioning the seat portion 3 in the left-right and front-back directions relative to the leg portion 5.

[0051] (Support belt) The auxiliary belt 8 is used to prevent the seat body 2 of the child seat 1 from falling off the bicycle body 90. The auxiliary belt 8 is inserted through the seat 3 and leg parts 5 together and is connected to the part of the bicycle body 90 excluding the luggage rack 98.

[0052] In detail, the auxiliary belt 8 is inserted through the through-hole 30 in the front end portion 37 of the seat portion 3 and the through-hole 50 in the front end portion 517 of the leg portion 5, and is inserted through both the seat portion 3 and the leg portion 5 together. The annularly shaped auxiliary belt 8 is inserted through the through-holes 30 and 50 and is also hooked onto the seat stay 92 of the bicycle frame 90.

[0053] (Effects and Benefits) According to the bicycle 9 of the above-described embodiment, the transportability of the child seat 1 for the bicycle can be improved, and the ease of attaching the child seat 1 to the bicycle body 90 can be improved.

[0054] In other words, in one embodiment of the bicycle 9, when transporting the child seat 1, the seat portion 3 and back portion 4, which are integrally constructed, and the leg portion 5, which is a separate component, can be transported separately. Therefore, there is no need to secure a large transport space, and transportability is good. In one embodiment of the bicycle 9, after transporting the leg portion 5, it is necessary to fix the leg portion 5 to the luggage rack 98 of the bicycle body 90, and then attach the seat portion 3 to the connecting base 51 of the leg portion 5.

[0055] When installing the seat portion 3, first, the front end portion 37 of the seat portion 3 is inserted from above into the through hole 50 of the front end portion 517 of the connecting base 51. Then, the shaft portion 32 of the front end portion 37 of the seat portion 3 is hooked from below onto the bearing portion 53 of the front end portion 517 of the connecting base 51, forming a hinge structure with the bearing portion 53 and the shaft portion 32. At this time, the seat portion 3 is in an oblique position, with the rear portion positioned higher.

[0056] Next, with the shaft portion 32, which is engaged with the bearing portion 53, as the center, the seat portion 3 is rotated downward around a horizontal axis extending in the left-right direction, and the main body portion 31 of the seat portion 3 is placed on the connecting base 51 of the leg portion 5. The rotation of the seat portion 3 is smoothly guided by the sliding contact between the outer surface of the shaft portion 32 and the guide surface 533 of the bearing portion 53.

[0057] With the seat 3 placed on the leg 5, two projections 61 protruding downward from the main body 31 of the seat 3 are inserted one-to-one into two engaging parts 62 provided on the connecting base 51 of the leg 5, thereby positioning the seat 3 in the left-right and front-back directions relative to the leg 5. Additionally, two triangular rib-shaped projections 33 protruding downward from the front end portion 37 of the seat 3 are inserted into through holes 50 in the connecting base 51 of the leg 5, thereby positioning the seat 3 in the left-right and front-back directions relative to the leg 5. In this state, the seat 3 is attached to the leg 5.

[0058] Thus, in this embodiment of the bicycle 9, the child seat 1 can be easily attached to the bicycle body 90. Moreover, during attachment, the worker can reliably insert the front end portion 37 of the seat portion 3 into the front end portion 517 of the connecting base 51 from above while visually checking the process, thus further improving the ease of attaching the child seat 1 to the bicycle body 90.

[0059] 2. Variations The above configurations of the bicycle body 90 and child seat 1 in one embodiment are merely examples, and can be modified as appropriate within the range of achieving similar effects, as listed below. It is also possible to combine and apply the configurations of the multiple modified examples listed below.

[0060] In the following description, components having the same function as those in one embodiment are denoted by the same reference numerals, and detailed explanations are omitted.

[0061] (First variation) Figures 9 and 10 show the main parts of the child seat 1 provided in the first modified bicycle 9 (i.e., the structure for attaching the seat 3 to the leg portion 5).

[0062] In the first modified bicycle 9, the front end portion 37 of the seat 3 includes a rod-shaped shaft portion 32 extending in the left-right direction and a through hole 300 located behind the shaft portion 32. The front end portion 517 of the connecting base 51 of the leg portion 5 includes a bearing portion 53 that rotatably receives the shaft portion 32. The bearing portion 53 has a concave curved guide surface 533 that guides the rotation of the shaft portion 32.

[0063] However, the front end portion 517 of the connecting base 51 does not have a through hole, such as the through hole 50 in one embodiment, into which the front end portion 37 of the seat portion 3 can be inserted. In the first modified example, the front end portion 517 of the connecting base 51 further includes a support piece 56 that extends diagonally upward and forward to support the bearing portion 53. The guide surface 533 of the bearing portion 53 is located in front of the support piece 56 and includes a concave curved surface with an arc-shaped cross-section that is open downward. As shown in Figure 10, the support piece 56 of the leg portion 5 is inserted through the through hole 300 of the seat portion 3 from below.

[0064] In the first modified example, the transportability of the bicycle child seat 1 can be improved, and the ease of attaching the child seat 1 to the bicycle body 90 can also be improved.

[0065] In other words, even in the first modified example, when transporting the child seat 1, the seat 3 and backrest 4 and the leg rest 5 can be transported separately, resulting in good transportability.

[0066] When installing the seat portion 3, the front end portion 517 of the connecting base 51 is inserted from below into the through hole 300 of the front end portion 37 of the seat portion 3. Then, the shaft portion 32 of the front end portion 37 of the seat portion 3 is hooked from below onto the bearing portion 53 of the front end portion 517 of the connecting base 51. At this time, the seat portion 3 is in an oblique position, with the rear portion positioned higher.

[0067] Next, with the shaft portion 32, which is engaged with the bearing portion 53, as the center, the seat portion 3 is rotated downward around a horizontal axis extending in the left-right direction, and the entire seat portion 3 is placed on the leg portion 5. The rotation of the seat portion 3 is smoothly guided by the sliding contact between the outer surface of the shaft portion 32 and the guide surface 533 of the bearing portion 53.

[0068] In the first modified example, the child seat 1 can be easily attached to the bicycle frame 90, and moreover, during installation, the worker can reliably insert the front end portion 517 of the connecting base 51 into the through hole 300 of the front end portion 37 of the seat portion 3 from below while visually checking the process.

[0069] (Second variation) Figure 11 shows the main components of the child seat 1 (i.e., the structure for attaching the seat 3 to the leg rest 5) of the second modified bicycle 9.

[0070] In the second modified bicycle 9, the axle portion 32 of the seat portion 3 includes a downward-extending hanging portion 325 and a projection 326 that protrudes forward from the lower end of the hanging portion 325. The projection 326 has a rectangular flat plate shape with the left-right direction as the longitudinal direction and the front-back direction as the short direction.

[0071] The front end portion 517 of the connecting base 51 of the leg portion 5 includes a bearing portion 53 and an opening 57 provided behind the bearing portion 53. The bearing portion 53 is a rod-shaped portion that extends in the left-right direction.

[0072] The bearing portion 53 has a rectangular, flat plate shape with the left-right direction as its longitudinal direction and the up-down direction as its short direction. The opening 57 is located adjacent to the bearing portion 53 in the front-rear direction and is composed of a through hole that penetrates vertically.

[0073] The lower part of the flat bearing portion 53 forms the front edge of the opening 57. The bearing portion 53 is located at the very front of the front end portion 517, or in other words, it constitutes the very front part of the connecting base 51 of the leg portion 5.

[0074] In the second modified example, the hanging portion 325 and projection 326, which constitute the shaft portion 32 of the seat portion 3, are inserted from above toward the opening 57 of the leg portion 5, and the projection 326 is configured to lock onto the lower end edge of the flat bearing portion 53 from below. The seat portion 3 is rotatably supported relative to the leg portion 5, with the locking portion between the shaft portion 32 and the bearing portion 53 as the center.

[0075] In the second modified example, the transportability of the bicycle child seat 1 can be improved, and the ease of attaching the child seat 1 to the bicycle body 90 can also be improved.

[0076] In other words, even in the second modified example, when transporting the child seat 1, the seat 3 and backrest 4 and the leg rest 5 can be transported separately, resulting in good transportability.

[0077] When attaching the seat 3, first, the shaft portion 32 of the front end portion 37 of the seat 3 is inserted from above into the opening 57 of the connecting base 51 of the leg portion 5. Then, the projection 326 of the shaft portion 32 is hooked onto the bearing portion 53 of the connecting base 51 from below. At this time, the seat 3 is in an oblique position with the rear portion positioned higher. Next, the seat 3 is rotated downward around a horizontal axis extending in the left-right direction, with the shaft portion 32 hooked onto the bearing portion 53 as the center, and the entire seat 3 is placed on the leg portion 5.

[0078] In the second modified example, the child seat 1 can be easily attached to the bicycle frame 90, and during installation, the worker can reliably insert the shaft portion 32 of the front end portion 37 of the seat portion 3 from above towards the opening 57 of the connecting base 51 of the leg portion 5 while visually confirming the process.

[0079] (Other variations) In one embodiment of the bicycle 9, the bicycle body 90 is an electric assist bicycle, but the type of bicycle is not limited to this. For example, the bicycle body 90 may be a bicycle without an electric assist function, or it may be an electric bicycle driven solely by the rotational force of a motor.

[0080] In one embodiment of the bicycle 9, the axle portion 32 of the child seat 1 is provided at the front end portion 37 of the seat 3, but the position of the axle portion 32 is not limited to this, and for example, the axle portion 32 may be provided at the rear end portion of the seat 3. In this case, the bearing portion 53 of the leg portion 5 is provided at the rear end portion of the connecting base 51. When attaching the seat 3, the entire seat 3 can be rotated up and down around the axle portion 32 at the rear end portion of the seat 3.

[0081] In one embodiment of the bicycle 9, the seat portion 3 is provided with a plurality of protrusions 61 and the leg portion 5 is provided with a plurality of engaging portions 62, but this can be reversed. In other words, as long as the plurality of protrusions 61 and the plurality of engaging portions 62 engage to position the seat portion 3, the leg portion 5 may be provided with a plurality of protrusions 61 and the seat portion 3 may be provided with a plurality of engaging portions 62.

[0082] The method of connecting the seat portion 3 and the leg portion 5 is not limited to the above method. It is also preferable to attach the seat portion 3 to the leg portion 5 using the shaft portion 32, and then further securely fasten the seat portion 3 and the leg portion 5 using, for example, bolts and nuts.

[0083] 3. Summary As described above based on one embodiment and various modifications, the child seat (1) according to the first embodiment is a child seat (1) equipped with a seat body (2) that is attached to a bicycle body (90). The seat body (2) includes a seat (3) configured for a child to sit facing forward, a backrest (4) integrally formed with the seat (3) to support the back of a child seated on the seat (3), and leg portions (5) separately formed from the seat (3) and backrest (4) to support the legs of a child seated on the seat (3). The seat (3) includes a shaft portion (32) provided for attaching the seat (3) to the leg portions (5). The leg portions (5) include a bearing portion (53) provided to rotatably support the shaft portion (32).

[0084] According to this embodiment, when transporting the child seat (1), the seat (3) and backrest (4) and the leg section (5) can be transported separately, thus improving the transportability of the child seat (1). In addition, when attaching the seat (3), the shaft (32) of the seat (3) can be hooked onto the bearing (53) of the leg section (5), and the entire seat (3) can be rotated around the shaft (32), thereby improving the ease of attaching the child seat (1) to the bicycle frame (90).

[0085] In the child seat (1) according to the second embodiment, the bearing portion (53) of the leg portion (5) has a guide surface (533) that guides the rotation of the shaft portion (32).

[0086] In this embodiment, when attaching the seat portion (3), the outer circumferential surface of the shaft portion (32) slides against the guide surface (533) of the bearing portion (53), thereby smoothly guiding the rotation of the seat portion (3).

[0087] In the child seat (1) according to the third embodiment, in the first embodiment, the shaft portion (32) of the seat portion (3) includes a downwardly extending hanging portion (325) and a projection (326) protruding from the hanging portion (325). The leg portion (5) further includes an opening (57) adjacent to the bearing portion (53). The shaft portion (32) is configured such that the hanging portion (325) is inserted into the opening (57) of the leg portion (5), and the projection (326) is locked to the bearing portion (53) of the leg portion (5).

[0088] According to this embodiment, when attaching the seat (3), the projection (326) of the shaft (32) is hooked onto the bearing (53) of the leg (5), and the entire seat (3) is rotated around the projection (326), thereby improving the ease of attaching the child seat (1) to the bicycle frame (90).

[0089] In the child seat (1) according to the fourth embodiment, in any one of the first to third embodiments, the shaft portion (32) is provided at the front end portion (37) of the seat portion (3).

[0090] According to this embodiment, when attaching the seat (3), the entire seat (3) only needs to be rotated up and down around the shaft (32) at the front end portion (37) of the seat (3), and it is also easy to visually confirm the process of hooking the shaft (32) onto the bearing portion (53), thus improving the ease of attaching the child seat (1) to the bicycle frame (90).

[0091] In the child seat (1) according to the fifth embodiment, the leg portion (5) further includes a footrest portion (52) on which the feet of a child seated on the seat portion (3) can be placed. The bearing portion (53) is located in front of the footrest portion (52).

[0092] According to this embodiment, when attaching the seat (3), the entire seat (3) is rotated up and down around the shaft (32) supported by the bearing (53) located in front of the footrest (52), and it is also easy to visually confirm the process of hooking the shaft (32) onto the bearing (53), thus improving the ease of attaching the child seat (1) to the bicycle frame (90).

[0093] The child seat (1) according to the sixth embodiment further comprises an auxiliary belt (8) that is inserted through the seat (3) and leg portion (5) in the fourth or fifth embodiment. The leg portion (5) is attached to the luggage rack (98) of the bicycle body (90). The auxiliary belt (8) is connected to the part of the bicycle body (90) excluding the luggage rack (98). The axle portion (32) of the seat (3) is located in front of the portion of the seat (3) through which the auxiliary belt (8) is inserted.

[0094] In this configuration, the child seat (1) is prevented from falling off the bicycle frame (90) by the auxiliary belt (8).

[0095] The child seat (1) according to the seventh embodiment further comprises an auxiliary belt (8) that is inserted through the seat (3) and leg portion (5) according to the fourth or fifth embodiment. The leg portion (5) is attached to the luggage rack (98) of the bicycle body (90). A through hole (30) is formed in the front end portion (37) of the seat (3). A through hole (50) is formed in the leg portion (5) into which the front end portion (37) of the seat (3) is inserted. The auxiliary belt (8) is inserted through the seat (3) and the leg portion (5) through the through hole (30) of the seat (3) and the through hole (50) of the leg portion (5).

[0096] According to this embodiment, by utilizing the shaft portion (32) and through hole (30) provided in the front end portion (37) of the seat portion (3), and the bearing portion (53) and through hole (50) of the leg portion (5), it is possible to improve the ease of attaching the child seat (1) to the bicycle body (90) and to prevent the child seat (1) from falling off.

[0097] In the child seat (1) according to the eighth embodiment, in any one of the first to seventh embodiments, a plurality of protrusions (61) are provided on one of the seat (3) and the leg portion (5), and a plurality of engaging portions (62) are provided on the other of the seat (3) and the leg portion (5). The seat (3) is positioned relative to the leg portion (5) by the plurality of protrusions (61) engaging with the plurality of engaging portions (62).

[0098] According to this embodiment, the seat portion (3) can be rotated around the shaft portion (32), and with the seat portion (3) placed on the leg portion (5), the multiple projections (61) engage with the multiple engagement portions (62), thereby enabling the horizontal positioning of the seat portion (3).

[0099] The bicycle (9) according to the ninth embodiment comprises a child seat (1) according to any one of the first to eighth embodiments, and a bicycle body (90) to which the seat body (2) of the child seat (1) is attached.

[0100] According to this embodiment, when transporting the child seat (1), the seat (3) and backrest (4) and the leg portion (5) can be transported separately, thus improving the transportability of the child seat (1). When attaching the child seat (1) to the bicycle frame (90), the leg portion (5) is fixed to the bicycle frame (90), then the shaft portion (32) of the seat (3) is hooked onto the bearing portion (53) of the leg portion (5), and the entire seat (3) is rotated around the shaft portion (32), thereby improving the ease of attaching the child seat (1) to the bicycle frame (90). [Explanation of symbols]

[0101] 1 Child car seat 2 Seat Body 3 Seat area 30 Through holes 32 Shaft section 325 Drooping part 326 Protrusion 37 Front end part 4 Back 5 Legs 50 Through holes 52 Footrest 53 Bearing section 533 Guide surface 57 Opening 61 Protrusion 62 Engaging part 8. Auxiliary belt 9 Bicycle 90 Bicycle Body 98 cargo bed

Claims

1. A child seat equipped with a seat body that can be attached to the bicycle frame, The aforementioned seat body is A seat designed so that the child can sit facing forward, A backrest, which is integrally formed with the seat, to support the back of a child seated on the seat, It includes leg parts that are configured separately from the seat and backrest to support the feet of a child seated on the seat, The seat portion includes a shaft portion provided for attaching the seat portion to the leg portion, The leg portion includes a bearing portion provided to rotatably support the shaft portion, child seat.

2. The bearing portion of the leg has a guide surface that guides the rotation of the shaft portion. A child car seat according to claim 1.

3. The shaft portion of the seat portion includes a downward-extending hanging portion and a projection protruding from the hanging portion, The leg portion further includes an opening adjacent to the bearing portion, The shaft portion is configured such that the hanging portion is inserted into the opening of the leg portion, and the projection is locked into the bearing portion of the leg portion. A child car seat according to claim 1.

4. The shaft portion is provided at the front end portion of the seat portion. A child car seat according to any one of claims 1 to 3.

5. The leg portion further includes a footrest on which both feet of a child seated on the seat portion can be placed, The bearing portion is located in front of the footrest portion. Child car seat according to claim 4.

6. The system further includes auxiliary belts that are inserted through the seat and the legs, The aforementioned legs are attached to the luggage rack of the bicycle body. The auxiliary belt is connected to the part of the bicycle body excluding the luggage rack. The shaft portion of the seat is located in front of the portion of the seat through which the auxiliary belt is inserted. Child car seat according to claim 4.

7. The system further includes auxiliary belts that are inserted through the seat and the legs, The aforementioned legs are attached to the luggage rack of the bicycle body. A through hole is formed in the front end portion of the seat portion. The leg portion has a through hole into which the front end portion of the seat portion can be inserted. The auxiliary belt is inserted through the through-hole in the seat and the through-hole in the leg, Child car seat according to claim 4.

8. Multiple protrusions are provided on either the seat portion or the leg portion. Multiple engaging parts are provided on the other side of the seat and the leg. The seat portion is positioned relative to the leg portion by the engagement of each of the multiple protrusions with the multiple engagement portions. A child car seat according to claim 1.

9. A child car seat according to claim 1, The bicycle body to which the seat body of the child seat is attached comprises bicycle.

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