Baby stroller with bicycle function

Abstract

The present invention provides a baby stroller with a bicycle function, comprising a frame, the frame comprising a main support seat, a front tube group hingedly connected to the front side of the main support seat, a pair of rotatable front wheel groups are arranged on both sides below the front tube group, lower support tubes are connected to both sides of the rear of the main support seat, the lower end of each lower support tube is hingedly connected to a rotatable rear wheel, the upper ends of the pair of lower support tubes are hingedly connected to an armrest, the main support seat is detachably connected to a seat, a vertically arranged handle is detachably connected to the front tube group, a pedal group is arranged on the inner side of the front wheel, the pedal group comprises a pedal rod that is continuously bent in reverse, a pair of pedals is fixed on the pedal rod, both ends of the pedal rod are connected to the pair of front wheels and drive the front wheels to rotate, and the detachably connected seat and pedal accessories can be used to conveniently change the use state of the baby stroller, so the applicability is wide and suitable for infants and young children of a long age group.

Description

Technical Field

[0001] The invention relates to a baby stroller with bicycle function. Background Art

[0002] The high-view baby strollers currently on the market have only two functions, which are suitable for babies from birth to about 2 years old. The first mode is to add a sleeping basket for the newborn to sleep flat, and the second mode is to adjust the angle of the sleeping basket for babies from 1 to 2 years old to sit. They are expensive, not very practical, have a short service life, take up space, and are heavy. Summary of the Invention

[0003] The present invention improves the above-mentioned problem, that is, the technical problem to be solved by the present invention is that the existing baby carriages have a short service life, a single function, and take up space.

[0004] The specific implementation scheme of the present invention is: a baby stroller with bicycle function, comprising a frame, the frame comprising a main support seat, a front tube group hingedly connected to the front side of the main support seat, a pair of rotatable front wheel groups are provided on both sides below the front tube group, lower support tubes are connected to both sides of the rear part of the main support seat, the lower end of each lower support tube is hingedly connected to a rotatable rear wheel, the upper ends of a pair of lower support tubes are hingedly connected to an armrest, the main support seat is detachably connected to a seat, a vertically arranged handlebar is detachably connected to the front tube group, a pedal group is provided on the inner side of the front wheel, the pedal group comprises a pedal rod that is continuously bent in reverse, a pair of pedals are fixed on the pedal rod, both ends of the pedal rod are connected to a pair of front wheels and drive the front wheels to rotate.

[0005] Furthermore, a cradle support seat is fixed to the inner side of the lower part of the armrest, a sleeping basket is provided on the upper part of the cradle support seat, and both sides of the sleeping basket have plug-in blocks that can be inserted into the cradle support seat, and the plug-in blocks are snap-fitted with the cradle support seat.

[0006] Furthermore, the lower support tube is hingedly connected to the side of the main support seat, and the armrest and the main support seat are also fixedly connected with a rear support tube.

[0007] Furthermore, the front wheel group includes a front wheel group support frame and a rotatable front wheel hinged to the lower part of the front wheel group support frame, and pedal connecting shafts coaxially arranged with the front wheel axis extend from both ends of the pedal rod. The pedal connecting shafts located on both sides of the pedal rod are coaxially fixed with a central shaft passing through the front wheel axis, and a driving gear is fixed on the central shaft, and a gear fixing plate is coaxially fixed to the side of the front wheel. A gear block is hinged on the gear fixing plate via a torsion spring, and the gear block and the driving gear form a ratchet mechanism to realize unidirectional rotation of the front wheel. The outer side of the driving gear has a gear cover that is sleeved on the central shaft and fixedly connected to the gear fixing plate, and the lower part of the front wheel group support frame is connected to the central shaft via a bearing.

[0008] Furthermore, the front tube group includes a front cross bar and a rear longitudinal bar, and the lower inner part of the handle has a hinge screw that passes through the rear longitudinal bar and the main support seat. The hinge screw passes through the rear longitudinal bar and the bottom thread of the main support seat and is matched with a locking nut. The handle is fixedly connected to the rear longitudinal bar, and the rear longitudinal bar and the main support seat enable the handle to drive the front tube group to rotate around the hinge screw.

[0009] Furthermore, front wheel fixing seats are fixed at both ends of the front cross bar, and the upper end of the front wheel group support frame is fixed with a front wheel group vertical shaft inserted into the front wheel fixing seat; the outer surface of the front wheel group vertical shaft has an annular groove, and a front wheel fixing plate is fixed in the front group fixing seat, which is sleeved on the front wheel group vertical shaft and buckled into the annular groove, and the front wheel fixing plate has a round hole that can be sleeved into the front wheel group vertical shaft, and the front group fixing seat has a front wheel limiting pin that can slide up and down, and the front wheel limiting pin is fixed in the front group fixing seat. The top of the latch is fixedly connected with a paddle, and the lower part of the front wheel fixing seat is also fixedly connected with a front wheel fixing seat bottom cover which is sleeved on the vertical axis of the front wheel group. The upper end surface of the front wheel group support frame has a socket for inserting the front wheel limiting latch, and a card point spring is fixed in the front group fixing seat, and the inner end of the card point spring is fixedly connected with a cylindrical ejector pin. The front wheel limiting latch has a plurality of arc-shaped grooves distributed longitudinally on the side facing the cylindrical ejector pin, and the front wheel limiting latch is limited by the cylindrical ejector pin.

[0010] Furthermore, a limiting bolt is provided between the front end of the main support seat and the rear longitudinal rod, and the threaded end is inserted into the rear longitudinal rod. A plastic sleeve is fixed in the rear longitudinal rod, and the plastic sleeve has a limiting nut that can cooperate with the upper end of the limiting bolt. The front end of the main support seat has a bolt groove that can extend into the limiting bolt, and the lower end opening of the bolt groove is smaller than the bolt head diameter of the limiting bolt. The lower surfaces of the rear longitudinal rod and the plastic sleeve have a limiting arc groove for the limiting bolt to pass through. The lower end of the lower support tube is fixed to the rear wheel fixing seat, and the rear wheel has a rear wheel rotating shaft inserted into the rear wheel fixing seat at one end facing the rear wheel fixing seat, and the rear wheel rotating shaft has an annular fixing groove, and the rear wheel fixing seat has a rear wheel fixing plate that is sleeved on the rear wheel rotating shaft and buckled in the annular fixing groove. There is a The brake pedal is fixed to the outside of the brake pipe, and a shock-absorbing spring is placed between the outer side of the lower end of the lower support tube and the rear wheel fixing seat.

[0011] Furthermore, the armrest includes a lower armrest tube, the upper end of the lower armrest tube is connected to a U-shaped upper armrest tube via an armrest joint group, the armrest joint group includes an armrest left joint fixed to the upper end of the lower armrest tube, and an armrest right joint fixed to the lower end of the upper armrest tube, the left armrest joint has a first inner gear ring, the right armrest joint has a second inner gear ring, the inner cavities of the left armrest joint and the right armrest joint are arranged facing each other, and the axes of the left armrest joint and the right armrest joint are connected via a pin shaft and can rotate relative to each other, and the pin shaft is sleeved with a An upper armrest joint gear is meshed with the first inner gear ring and the second inner gear ring and is sleeved on the pin shaft. The joint gear is connected to the left armrest joint via an armrest spring. A button is provided on the outside of the right armrest joint. The inner end of the button passes through the right armrest joint and the end has a protrusion to prevent the button from falling out of the right armrest joint. The joint gear is located in the middle of the matching part of the left armrest joint and the right armrest joint and its thickness is less than or equal to the thickness of the inner gear ring of the left armrest joint. The armrest is connected to the upper end of the lower support tube via the retracting joint. The car retracting joint includes a left car retracting joint fixed to the upper part of the lower support tube and a right car retracting joint fixed to the lower armrest. A joint clamping block is fixed in the left car retracting joint, and a joint spiral seat is sleeved in the right car retracting joint. The joint spiral seat has an inclined surface facing the right car retracting joint. The joint clamping block and the left joint are connected via a joint spring to ensure that the joint clamping block is located between the right car retracting joint and the left car retracting joint. The joint clamping block has a convex portion along the circumferential direction, and the facing surfaces of the right car retracting joint and the left car retracting joint have an inward concave portion that can engage with the joint. The limit groove of the joint block cooperates with the right joint of the car folding, and the slope surface that cooperates with the inclined surface of the joint spiral seat is also provided in the right joint of the car folding and the left joint of the car folding. There are joint shafts that pass through the joint spiral seat, the joint spring, and the joint block in the right joint and the left joint of the car folding. The pull rope that can pull the joint spiral seat to rotate around the joint axis is used in the lower handrail tube, so that the joint block overcomes the joint spring and the joint block is separated from the right joint of the car folding to realize the joint rotation around the joint axis. A dial knob is fixed on the upper end of the stretching, and the dial knob slides with the lower handrail tube.

[0012] Furthermore, a headrest fixing tube is fixedly connected to the rear side of the seat, a headrest is fixedly connected to the headrest fixing tube, an arc-shaped brake plate is fixedly connected to the lower part of the front wheel fixing seat, a basket or ceiling bracket is fixed to the upper part of the cradle body, and the ceiling bracket is detachably connected to the cradle or frame.

[0013] Furthermore, the side of the pedal connecting shaft has an opening, the end of the pedal rod facing the front wheel is inserted into the pedal connecting shaft, the end of the pedal rod has an annular limiting groove, an angular clip is fixed inside the pedal connecting shaft, the end of the angular clip facing the pedal rod has a snap ring that can be buckled into the annular limiting groove, one end of the angular clip extends out of the pedal connecting shaft, and a clip spring is located inside the pedal connecting shaft between the outer end of the angular clip and the wheel support frame, and the pedal connecting shaft has a groove for one end of the angular clip to extend out.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a compact structure, utilizes detachably connected seat and footrest accessories, can conveniently change the use state of the baby stroller, has wide applicability, and is suitable for infants and young children of a long age range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the frame structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the seat mode structure of the present invention in use.

[0017] Figure 3 This is a schematic diagram of the four-wheel pedal mode structure in use according to the present invention.

[0018] Figure 4 This is a schematic diagram of the use of the sleeping basket structure of the present invention Figure 1 .

[0019] Figure 5 The present invention is provided with a sleeping basket structure in a state of use. Figure 2 .

[0020] Figure 6 This is a front view of the four-wheel pedal mode of embodiment 2 of the present invention.

[0021] Figure 7 For the present invention Figure 6 Schematic diagram of the cross-section structure on one side.

[0022] Figure 8 It is a partial cross-sectional schematic diagram of the connection between the pedal and the front wheel of the present invention.

[0023] Figure 9 This is a cross-sectional diagram of the connection structure between the handle and the main support frame of Example 3.

[0024] Figure 10 It is a schematic diagram of the three-dimensional structure of the connection structure between the handle and the main support frame.

[0025] Figure 11 Schematic diagram of the arc groove structure at the bottom of the main support frame.

[0026] Figure 12 This is a schematic diagram of the structure in which the handle drives the front pipe group to rotate.

[0027] Figure 13 This is a schematic diagram of the exploded structure of the front wheel fixing seat and the front wheel assembly of Example 3.

[0028] Figure 14 for Figure 12 Enlarged schematic diagram of local structure.

[0029] Figure 15This is a schematic diagram of the cross-sectional structure of the front wheel fixing seat and the front wheel assembly in the assembled state.

[0030] Figure 16 This is a schematic diagram of the exploded structure of the armrest joint assembly of Example 4.

[0031] Figure 17 This is a schematic diagram of the bending structure of the upper and lower handrail tubes in Example 4.

[0032] Figure 18 This is a schematic diagram of the vehicle retracting joint structure of Example 5.

[0033] Figure 19 The utility model relates to a baby stroller in a folded state with a folding joint structure.

[0034] Figure 20 This is the rear wheel structure of the baby stroller with a brake structure according to the sixth embodiment.

[0035] Figure 21 Schematic diagram of the rear wheel structure.

[0036] Figure 22 This is a schematic diagram of the broken surface of the brake pipe and rear wheel fixing seat assembly structure.

[0037] Figure 23 This is a schematic diagram of the structure of embodiment 7 Figure 1 .

[0038] Figure 24 This is a schematic diagram of the structure of embodiment 7 Figure 2 .

[0039] Figure 25 This is a schematic diagram of the pedal rod fixing structure of Example 7.

[0040] Figure 26 Schematic diagram of the front wheel brake pad structure.

[0041] Figure 27 Schematic diagram of the ejector pin structure. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1 to 5As shown, a baby stroller with bicycle function includes a frame, which includes a main support seat 10, a front tube group 20 is hinged on the front side of the main support seat 10, and a pair of rotatable front wheel groups 210 are provided on both sides below the front tube group 20, and lower support tubes 110 are connected to both sides of the rear part of the main support seat, and the lower end of each lower support tube is hinged with a rotatable rear wheel 30, and the upper end of a pair of lower support tubes is hinged with an armrest 40, the main support seat is detachably connected to a seat 50, and a vertically arranged handlebar 60 is detachably connected to the front tube group, and a pedal group is provided on the inner side of the front wheel, and the pedal group includes a pedal rod 710 that is continuously bent in reverse, and a pair of pedals 720 are fixed on the pedal rod, and both ends of the pedal rod are connected to a pair of front wheels and drive the front wheels to rotate.

[0044] In this embodiment, a cradle support seat 810 is fixed to the inner side of the lower part of the armrest 40, and a sleeping basket 80 is provided on the upper part of the cradle support seat. Both sides of the sleeping basket are provided with insertion blocks 820 that can be inserted into the cradle support seat. The insertion blocks are snap-fitted with the cradle support seat 810. The cradle body can be fixed to the block 820 by bolts or other means, and the upper part can be designed with a handle 830 or a ceiling bracket 840.

[0045] In this embodiment, the lower support tube is hingedly connected to the side of the main support seat, and the armrest 40 and the main support seat are also fixedly connected with the rear support tube 120 to achieve overall support.

[0046] The above structure can be used to achieve the following mode conversions:

[0047] like Figure 2 The seat mode is shown. Installing the seat and handles can provide a sitting environment for children aged 1 to 4 years old. The advantages are that the sleeping basket is removed, space is reduced, the weight is lighter, and it is easier for parents to carry. The seat 50 can be fixed to the rear side of the main support seat 10 by bolts, and the handle is fixed to the front tube group 20 for auxiliary armrests or to achieve operating direction.

[0048] like Figure 3 In a four-wheel bicycle mode, the baby carriage equipped with a seat, handlebars and pedal assembly 70 can be used as a four-wheel bicycle and can be used by children aged 2 to 6. The four-wheel structure has good stability, high safety, and is easy to ride and turn.

[0049] like Figure 4 and Figure 5 As shown, the sleeping basket can be installed to provide babies from newborns to about one year old with a flat sleeping position. The sleeping basket can be installed in a horizontal position in the forward direction or in the reverse direction, which is convenient for adults to observe the baby. The top of the sleeping basket can be provided with a roof to prevent direct sunlight from shining into the eyes. A handle is installed in the middle of the sleeping basket. It can also be configured according to the specific size of the sleeping basket to provide a sitting position for children from one to three years old. In the above embodiment,

[0050] Embodiment 2: In this embodiment, the front wheel group 210 includes a front wheel group support frame 211 and a rotatable front wheel 212 hinged to the lower part of the front wheel group support frame, and pedal connecting shafts 213 coaxially arranged with the front wheel axis are extended from both ends of the pedal rod. The pedal connecting shafts on both sides of the pedal rod are coaxially fixed with a central shaft 214 passing through the front wheel axis, and a driving gear 215 is fixed on the central shaft. A gear fixing plate 216 is coaxially fixed to the side of the front wheel, and a gear block 218 is hinged to the gear fixing plate 216 via a torsion spring 217. The gear block and the driving gear form a ratchet mechanism to realize unidirectional rotation of the front wheel. The outer side of the driving gear is provided with a gear cover 219 that is sleeved on the central shaft and fixedly connected to the gear fixing plate. The lower part of the front wheel group support frame 211 is connected to the central shaft 214 via a bearing 220.

[0051] In this embodiment, the gear fixing plate 216, torsion spring 217, and gear block 218 constitute a ratchet mechanism, which is equivalent to a one-way clutch in the prior art, thereby ensuring that when the pedal rod 710 is stepped on, the driving gear is driven to rotate, thereby driving the gear fixing plate and the front wheel 212 to rotate. When the pedal rod 710 rotates in the opposite direction, the gear block overcomes the rebound of the torsion spring due to the action of the torsion spring and does not take effect, thereby preventing the pedal rod 710 from moving backward, ensuring safety.

[0052] In this embodiment, in order to realize the rotation of the front wheel group by operating the handle 60, the front tube group 20 includes a front cross bar 201 and a rear longitudinal bar 202, and the lower inner part of the handle has a hinge screw 203 that passes through the rear longitudinal bar and the main support seat, and the hinge screw passes through the rear longitudinal bar 202 and the bottom thread of the main support seat and is matched with a locking nut 204, and the handle is fixedly connected to the rear longitudinal bar 202, and the rear longitudinal bar and the main support seat so that the handle drives the front tube group to rotate around the hinge screw 203.

[0053] In order to ensure lubrication, the mating surface between the rear longitudinal rod 202 and the main support seat is provided with a first bearing 2031 , and the lower portion of the handle 60 is fixedly connected to the rear longitudinal rod 202 via a screw 2021 .

[0054] In this embodiment, a metal connecting piece 101 can also be fixed to the front end of the main support frame. In actual design, the main support frame can be fixedly connected to other connecting accessories at the end to more conveniently adjust different front tube assembly lengths or assembly holes. In addition, in this embodiment, a second bearing 2032 is provided between the lower end of the hinge screw 203 and the front tube assembly to reduce wear on the assembly surface.

[0055] In this embodiment, a stop bolt 207 is located between the front end of the main support base 10 and the rear longitudinal rod, with its threaded end inserted into the rear longitudinal rod. A plastic sleeve 205 is fixed to the rear longitudinal rod, and a stop nut 206 is provided within the plastic sleeve, which is threadably engaged with the upper end of the stop bolt. The front end of the main support base has a bolt slot 208, into which the stop bolt can be inserted. The lower surfaces of the rear longitudinal rod and the plastic sleeve have a stop arc slot 209 for the stop bolt to pass through. Because the lower end opening of the bolt slot 208 is smaller than the diameter of the stop bolt's bolt head, when the stop bolt is removed, i.e., when the stop bolt and the stop nut are separated, the stop bolt falls into the bolt slot 208 due to gravity, rather than falling to the ground. The upper end of the stop bolt is located within the stop arc slot 209 of the rear longitudinal rod. The curvature of the stop arc slot determines the angle at which the handle can control the rotation of the front tube assembly 20.

[0056] In this example, the handle 60 turns to the left, driving the front tube group and the front wheel group to turn. At this time, the left front wheel rotates backward, and the gear block in the left front wheel group drives the gear in the left front wheel group and the pedal rod and the gear in the right front wheel group to rotate backward. At this time, the right front wheel rotates synchronously in the opposite direction of the left front wheel, and the gear in the right front wheel group disengages from the gear block of the right front wheel, so that steering can be achieved and the handle operation is flexible.

[0057] Embodiment 3. In this embodiment, front wheel fixing seats 221 are fixed at both ends of the front cross bar 201, and a front wheel group vertical shaft 222 inserted into the front wheel fixing seat 221 is fixed to the upper end of the front wheel group support frame 211; the outer surface of the front wheel group vertical shaft 222 has an annular groove 2221, and a front wheel fixing piece 223 that is sleeved on the front wheel group vertical shaft and buckled into the annular groove 2221 is fixed in the front group fixing seat, and the front wheel fixing piece has a circular hole 2231 that can be inserted into the front wheel group vertical shaft, and the front group fixing seat has a front wheel limiting plug that can slide up and down. Pin 224, the top of the front wheel limit pin is fixedly connected with a paddle 2241, and the lower part of the front wheel fixing seat is also fixedly connected with a front wheel fixing seat bottom cover 225 which is sleeved on the vertical axis of the front wheel group. The upper end surface of the front wheel group support frame has a socket 2111 for allowing the front wheel limit pin to be inserted, and a card point spring 225 is fixed in the front group fixing seat, and the inner end of the card point spring is fixedly connected with a cylindrical top pin 226. The front wheel limit pin has a plurality of arc-shaped grooves 2261 distributed longitudinally on the side facing the cylindrical top pin, and the front wheel limit pin is limited by the cylindrical top pin.

[0058] In this embodiment, the front wheel support frame 211 is inserted into the front wheel vertical axis 222 in the front wheel fixing seat 221 to realize the axial rotation of the front wheel around the front wheel vertical axis 222, and the front wheel fixing piece 223 is clamped in the annular groove 2221 by using a circular hole to limit the front wheel vertical axis 222. The front wheel fixing piece 223 can be fixed or can be supported by a spring to limit the front wheel vertical axis 222, and the limiting pin 224 is downward. After being inserted into the socket 2111, the front wheel assembly support frame 211 is locked and cannot rotate around the vertical axis 222 of the front wheel assembly. The spring pin structure composed of the card point spring 225 and the cylindrical push pin 226 can assist in positioning the limit pin 224. The contact surface between the cylindrical push pin 226 and the arc groove 2261 is arc-shaped. When unlocking is required, force is used to overcome the friction between the cylindrical push pin 226 and the arc groove 2261 and overcome the elastic force of the card point spring to realize the up and down movement of the limit pin 224.

[0059] Embodiment 4. In this embodiment, based on any of the above embodiments, the armrest includes a lower armrest tube 401, the upper end of the lower armrest tube 401 is connected to a U-shaped upper armrest tube 402 via an armrest joint group 420, the armrest joint group includes a left armrest joint 421 fixed to the upper end of the lower armrest tube, and a right armrest joint 422 fixed to the lower end of the upper armrest tube, the left armrest joint has a first inner gear ring, the right armrest joint has a second inner gear ring, the inner cavities of the left armrest joint and the right armrest joint are arranged facing each other, and the axes of the left armrest joint and the right armrest joint are connected via a distribution shaft. Relative rotation, the pin shaft is provided with an upper armrest joint gear 423 that meshes with the first inner gear ring and the second inner gear ring and is sleeved on the pin shaft, the joint gear is connected to the left joint of the armrest via an armrest spring 424, and the outside of the right joint of the armrest is provided with a button 425, the inner end of the button passes through the right joint of the armrest and the end has a protrusion to prevent the button from falling out of the right joint of the armrest, the protrusion can ensure that the button will not fall out of the right joint of the armrest, the joint gear is located in the middle of the joint between the left joint of the armrest and the right joint of the armrest and the thickness is less than or equal to the thickness of the inner gear ring of the left joint of the armrest.

[0060] By pressing the button 425, the raised joint gear 423 overcomes the spring force and separates from the right armrest joint and enters the left armrest joint, thereby enabling the left armrest joint and the right armrest joint to rotate to meet the requirement of folding to reduce the space size.

[0061] The cradle can also be designed with an armrest joint structure to adjust the angle of the cradle, or the angle of the cradle can be directly designed according to needs.

[0062] Embodiment 5. In this embodiment, the lower armrest tube 401 includes a connection with the upper end of the lower support tube 110 through a retracting joint 410. A pair of the retracting joints 410 include a left retracting joint 411 fixed to the upper part of the lower support tube and a right retracting joint 412 fixed to the lower armrest. A joint block 413 is fixed in the left retracting joint, and a joint spiral seat 414 is sleeved in the right retracting joint. The joint spiral seat has an inclined surface facing the right retracting joint. The joint block 413 and the left joint 411 are connected via a joint spring 417 to ensure that the joint block is located between the right retracting joint 412 and the left retracting joint 411. The joint block 413 has a convex portion 4131 along the circumferential direction. The right retracting joint and the left retracting joint are fixed with a joint block 413. The facing surfaces of the joints have a concave limiting groove 414 that can cooperate with the convex part of the joint block. The right joint for folding the car also has a slope that cooperates with the inclined surface of the joint spiral seat. The right joint and the left joint for folding the car have a joint axis that passes through the joint spiral seat, joint spring, and joint block. The lower handrail tube has a pull rope 415 that can pull the joint spiral seat to rotate around the joint axis, so that the joint block overcomes the joint spring and separates the joint block from the right joint for folding the car, so that the joint can rotate around the joint axis. A dial knob 416 is fixed to the upper end of the stretcher, and the dial knob slides with the lower handrail tube. After loosening the dial knob 416, the joint spiral seat is reset synchronously with the reset of the joint block through the action of the joint spring 417, thereby realizing the reset of the dial knob.

[0063] like Figure 19 As shown, when the lower end of the rear support tube 120 is released from the fixation with the main support seat, the lower support tube is hingedly connected to the side of the main support seat, and the armrest 40 and the main support seat utilize the retracting joint to realize the storage of the vehicle body.

[0064] Embodiment 6. In this embodiment, a rear wheel fixing seat 310 is fixed to the lower end of the lower support tube 110, and the rear wheel has a rear wheel shaft 301 inserted into the rear wheel fixing seat at one end facing the rear wheel fixing seat 310, and an annular fixing groove 302 is provided on the rear wheel shaft 301. A rear wheel fixing plate 320 is provided in the rear wheel fixing seat 310 and is sleeved on the rear wheel shaft 301 and buckled in the annular fixing groove 302. A brake pipe 330 is provided between the rear wheel fixing seats, and a rear wheel fixing seat back cover 340 buckled into the rear wheel fixing seat 310 is fixed at both ends of the brake pipe 330. The rear wheel fixing seat back cover 340 can rotate relative to the rear wheel fixing seat, and a brake ratchet 350 is fixed on one side of the rear wheel fixing seat back cover extending into the rear wheel fixing seat 310. The rear wheel fixing seat has a brake ratchet 350 that can rotate along the rear wheel fixing seat shaft. The brake shaft 360 is directed toward the rear wheel, and the end of the brake shaft 360 facing the brake pipe has a conical surface 361 that can cooperate with the brake ratchet to achieve axial transverse movement. The side of the rear wheel fixing seat 310 away from the fixing seat rear cover 340 is fixed with a fixing seat front cover 351, and a brake shaft return spring 370 is fixed between the brake shaft 360 and the fixing seat front cover 351. The outer end of the brake shaft 360 passes through the fixing seat front cover 351, and the inner side surface of the rear wheel is circumferentially provided with brake holes 380 that can cooperate with the brake shaft. A brake pedal 331 is fixed to the outside of the brake pipe 330.

[0065] During operation, the brake tube 330 is rotated by stepping on the brake pedal 331, which in turn rotates the rear wheel mount rear cover 340. The brake ratchet 350 on the inside of the rear wheel mount rear cover 340 rotates, causing its inclined surface to abut against the brake shaft 360. The brake shaft 360, abutted against the brake shaft, overcomes the elastic force of the brake shaft return spring 370, and inserts its end into the brake hole 380, thereby limiting the rotation of the rear wheel. Stepping on the other end of the brake pedal 331 again causes the brake tube 330 to rotate in the opposite direction, resetting the rear wheel mount rear cover 340. The brake shaft 360 is then ejected and released by the elastic force of the brake shaft return spring 370, thereby unlocking the vehicle. A shock absorber spring 390 is also placed between the outer side of the lower end of the lower support tube and the rear wheel mount.

[0066] Example 7, as Figures 23-26 In this embodiment, the ceiling bracket 840 can be detachably connected to the cradle or the rear support tube 120. A support is fixed below the ceiling bracket 840, and the support can be fixedly connected to the upper end of the rear support tube or the cradle 80.

[0067] In this embodiment, a headrest fixing tube 510 is fixedly connected to the rear side of the seat 50, and a headrest 520 is fixedly connected to the headrest fixing tube for the child to lean on. In addition, a curved brake plate 230 is fixedly connected to the lower part of the front wheel fixing seat, and a basket or ceiling bracket 840 is fixed to the upper part of the cradle body. The ceiling bracket 840 can be detachably connected to the cradle or frame. Figure 22 The middle roof bracket 840 is snap-connected to the rear support tube 120. Figure 23 The ceiling bracket 840 is snap-connected to the lower armrest tube 401 , and the cradle handle 830 can be snap-connected to the lower support tube 110 .

[0068] like Figure 24 , this embodiment also provides a pedal fixing method, the pedal connecting shaft 213 has an opening 2131 on the side, the pedal rod 710 is inserted into the pedal connecting shaft opening 2131 at one end facing the front wheel, the pedal rod 710 has an annular limiting groove 711 at the end, an angular buckle 712 is fixed inside the pedal connecting shaft, the angular buckle 712 has a snap ring 713 that can be buckled into the annular limiting groove at one end facing the pedal rod, and the pedal connecting shaft has A groove 2132 is provided for extending vertically from one end of the angular clip 712, and one end of the angular clip extends out of the groove 2132 to the outside of the pedal connecting shaft, and a clip spring 2133 is provided between the outer end of the angular clip and the wheel assembly support frame and located inside the pedal connecting shaft. The clip spring 2133 is used to push the angular clip 712 to force the snap ring 713 of the angular clip 712 to snap into the annular limiting groove 711, thereby achieving a fixed connection between the pedal connecting shaft 213 and the pedal rod 710.

[0069] Example eight, as Figure 27 In addition, in this embodiment, the limiting bolt 207 can be replaced by a top pin 2071 of the main support seat 10 that passes through the rear longitudinal rod, and the top pin 2071 is supported by the top pin spring 2072 at the bottom to meet the limitation of the rear longitudinal rod, and the top pin 2071 can be manually lowered to separate the main support seat 10 from the rear longitudinal rod 202. The side of the top pin 2071 has a shift plate 2073 extending out of the main support seat 10.

[0070] Unless otherwise stated, for any of the technical solutions disclosed in the present invention, if a numerical range is disclosed, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely a numerical range that is representative or has a more obvious technical effect among many feasible numerical values. Due to the large number of numerical values, it is impossible to enumerate them exhaustively. Therefore, the present invention discloses some numerical values ​​to illustrate the technical solutions of the present invention. Moreover, the numerical values ​​listed above should not be construed as limiting the scope of protection of the present invention.

[0071] If words such as "first" and "second" are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish between components. Unless otherwise stated, the above words have no special meaning.

[0072] At the same time, if the above-mentioned invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, using bolts or screws to connect), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0073] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the present invention to express positional relationships or shapes include states or shapes that are approximate, similar, or close thereto.

[0074] Any component provided by the present invention may be assembled from multiple separate components, or may be a separate component manufactured by an integral molding process.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. A baby stroller with bicycle function, characterized in that: The bicycle comprises a frame, wherein the frame comprises a main support seat, a front tube group is hingedly connected to the front side of the main support seat, a pair of rotatable front wheel groups are arranged on both sides below the front tube group, lower support tubes are connected to both sides of the rear of the main support seat, the lower end of each lower support tube is hingedly connected to a rotatable rear wheel, the upper ends of the pair of lower support tubes are hingedly connected to an armrest, the main support seat is detachably connected to a seat, a vertically arranged handlebar is detachably connected to the front tube group, a pedal group is arranged on the inner side of the front wheel, the pedal group comprises a pedal rod that is continuously bent in opposite directions, a pair of pedals are fixed on the pedal rod, and both ends of the pedal rod are connected to the pair of front wheels to drive the front wheels to rotate; A cradle support seat is fixed to the inner side of the lower part of the armrest, a sleeping basket is provided on the upper part of the cradle support seat, and both sides of the sleeping basket are provided with plugs that can be inserted into the cradle support seat, and the plugs are snap-fitted with the cradle support seat; The lower support tube is hingedly connected to the side of the main support seat, and the armrest and the main support seat are also fixedly connected with a rear support tube; The front wheel assembly includes a front wheel assembly support frame and a rotatable front wheel hinged to the lower part of the front wheel assembly support frame, and pedal connecting shafts coaxially arranged with the front wheel axis are extended from both ends of the pedal rod, and the pedal connecting shafts located on both sides of the pedal rod are coaxially fixed with a central shaft that passes through the front wheel axis, and a driving gear is fixed on the central shaft, and a gear fixing plate is coaxially fixed to the side of the front wheel, and a gear clamping block is hinged on the gear fixing plate via a torsion spring, and the gear clamping block and the driving gear form a ratchet mechanism to realize unidirectional rotation of the front wheel, and a gear cover is provided on the outer side of the driving gear, which is sleeved on the central shaft and fixedly connected to the gear fixing plate, and the lower part of the front wheel assembly support frame is connected to the central shaft via a bearing; The front tube group includes a front cross bar and a rear longitudinal bar, and the lower inner portion of the handle is provided with a hinge screw that passes through the rear longitudinal bar and the main support seat. The hinge screw passes through the rear longitudinal bar and the bottom thread of the main support seat and is matched with a locking nut. The handle is fixedly connected to the rear longitudinal bar, and the rear longitudinal bar and the main support seat are connected to the handle so that the handle drives the front tube group to rotate around the hinge screw. The top of the front wheel fixing plate is fixedly connected with the paddle wheel, and the top end of the front wheel fixing plate is fixedly connected with the front wheel fixing seat, and the front wheel fixing plate is locked in the annular slot.

2. The baby stroller with bicycle function according to claim 1, characterized in that: The front end of the main support seat is provided with a limit bolt located in the front end of the main support seat and the rear longitudinal rod, and the threaded end is inserted into the rear longitudinal rod. A plastic sleeve is fixed in the rear longitudinal rod, and the plastic sleeve has a limit nut that can cooperate with the upper end thread of the limit bolt. The front end of the main support seat has a bolt groove that can be inserted into the limit bolt, and the lower end opening of the bolt groove is smaller than the bolt head diameter of the limit bolt. The lower surfaces of the rear longitudinal rod and the plastic sleeve have a limit arc groove for the limit bolt to pass through. The lower end of the lower support tube is fixed to the rear wheel fixing seat, and the rear wheel has a rear wheel shaft inserted into the rear wheel fixing seat at one end facing the rear wheel fixing seat, and the rear wheel shaft has an annular fixing groove, and the rear wheel fixing seat has a rear wheel fixing plate that is sleeved on the rear wheel shaft and buckled in the annular fixing groove. There is a brake between the rear wheel fixing seats. The brake pedal is fixed to the outside of the brake pipe, and a shock absorber spring is placed between the outer side of the lower end of the lower support tube and the rear wheel fixing seat.

3. The baby stroller with bicycle function according to claim 1, characterized in that: The armrest includes a lower armrest tube, the upper end of the lower armrest tube is connected to a U-shaped upper armrest tube via an armrest joint group, the armrest joint group includes an armrest left joint fixed to the upper end of the lower armrest tube, and an armrest right joint fixed to the lower end of the upper armrest tube, the left armrest joint has a first inner gear ring, the right armrest joint has a second inner gear ring, the inner cavities of the left armrest joint and the right armrest joint are arranged facing each other, and the axes of the left armrest joint and the right armrest joint are connected via a pin shaft and can rotate relative to each other, and the pin shaft is provided with a sleeve that is connected to the first inner gear ring. The gear ring and the second inner gear ring mesh with each other and are sleeved on the upper armrest joint gear on the pin shaft, the joint gear is connected to the left joint of the armrest via an armrest spring, the outer side of the right joint of the armrest is provided with a button, the inner end of the button passes through the right joint of the armrest and the end has a protrusion to prevent the button from falling out of the right joint of the armrest, the joint gear is located in the middle of the matching place between the left joint of the armrest and the right joint of the armrest and the thickness is less than or equal to the thickness of the gear ring inside the left joint of the armrest, the armrest is connected to the upper end of the lower support tube through the retracting joint, a pair of retracting joints include a retracting left joint fixed to the upper part of the lower support tube and a retracting right joint fixed to the lower armrest, the left joint of the retracting joint is fixed with a joint clamping block, the right joint of the retracting joint is sleeved with a joint spiral seat, the joint spiral seat has an inclined surface facing the right joint of the retracting joint, the joint clamping block and the left joint are connected via a joint spring to ensure that the joint clamping block is located between the right joint of the retracting joint and the left joint of the retracting joint, the joint clamping block has a convex portion along the circumferential direction, and the facing surfaces of the right joint of the retracting joint and the left joint of the retracting joint have an inward concave portion that can engage with the joint clamping block The limit groove that cooperates with the block, the right joint of the car folding is also provided with a slope that cooperates with the inclined surface of the joint spiral seat, the right joint and the left joint of the car folding are provided with a joint shaft that passes through the joint spiral seat, the joint spring, and the joint block, and the lower handrail tube is provided with a pull rope that can pull the joint spiral seat to rotate around the joint axis, so that the joint block overcomes the joint spring and the joint block is separated from the right joint of the car folding to realize the joint rotation around the joint axis, and a toggle is fixed to the upper end of the pull rope, and the toggle is slidably matched with the lower handrail tube.

4. The baby stroller with bicycle function according to claim 1, characterized in that: A headrest fixing tube is fixedly connected to the rear side of the seat, a headrest is fixedly connected to the headrest fixing tube, a curved brake plate is fixedly connected to the lower part of the front wheel fixing seat, a carrying basket or a ceiling bracket is fixed to the upper part of the cradle support seat, and the ceiling bracket is detachably connected to the sleeping basket or the frame.

5. The baby stroller with bicycle function according to claim 1, characterized in that: The side of the pedal connecting shaft has an opening, the end of the pedal rod facing the front wheel is inserted into the pedal connecting shaft, the end of the pedal rod has an annular limiting groove, an angular clip is fixed inside the pedal connecting shaft, the end of the angular clip facing the pedal rod has a snap ring that can be buckled into the annular limiting groove, one end of the angular clip extends out of the pedal connecting shaft, and a clip spring is located inside the pedal connecting shaft between the outer end of the angular clip and the wheel set support frame, and the pedal connecting shaft has a groove for one end of the angular clip to extend out.

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