TWI691421B - Car assembly and its mother car and child car - Google Patents

Abstract

The car assembly and its mother car and child car of the present application have different operating states according to the actual use situation, and can be adapted to different use situations to solve the inconvenience of carrying the mother car and the child car through the hands when going out.

Description

Child-mother cart assembly and its mother cart and child cart

The present application is a cart. Specifically, it refers to a child-mother cart assembly and its mother cart and child cart.

In today's social life, more and more people will take children to travel. When traveling with children, in addition to carrying a suitcase that can be used to accommodate travel supplies, they also need to bring a stroller that can be used for infants. So that when pushing the suitcase with one hand, you must also push the idle stroller with the other hand, so that the suitcase and the stroller can keep going at the same time, so carrying the stroller will cause the burden of tourists and make travel when traveling Many inconveniences.

Therefore, this application is mainly to solve the technical problem of inconvenience caused by the need to carry the suitcase and the stroller separately with both hands when traveling.

In view of the above problems of the prior art, the main purpose of the present application is to provide a child-mother cart assembly that can be pushed on a ground and operated in a first operating state or a second operating state, including: a female The cart has: a main female cart shell, a female rolling mechanism, a female handle and a primary female cart shell, the female rolling mechanism is arranged in the main female cart shell, and has a female first A wheel set, a female second wheel set and a female third wheel set; the female handle is arranged on the main mother cart casing; and the secondary female cart casing is arranged above the main female cart casing , And has a containing space; and a sub-cart, the sub-cart is accommodated in the accommodating space, is: a sub-cart shell, a carrier and a sub handle, the carrier system is set in The sub-cart housing; and the sub-handle are provided on the sub-cart housing; wherein, when operating in the first operating state, both the female first wheel set and the female second wheel set , Or both the first wheel set of the mother and the third wheel set of the mother are exposed from the shell of the main mother cart and respectively touch the ground, and the main handle is exposed from the shell of the main mother cart. Pushing the mother cart with the child cart to slide on the ground; when operating in the second operating state, the mother first wheel set and the mother third wheel set are from the main mother cart shell The upper part is exposed to touch the ground respectively, and the child handle is exposed from the casing of the child cart to push the child cart, and then the mother cart is slid on the floor.

Optionally, for the aforementioned child-mother cart assembly, wherein the child cart further includes: a lifting structure, the lifting structure is connected to the carrying body; when operating in the first operating state, the lifting structure The driving mechanism lowers the carrying body into the accommodating space. When operating in the second operating state, the lifting structure drives the carrying body to lift up and leave the accommodating space to be exposed.

Optionally, for the aforementioned child-mother cart assembly, wherein the lifting structure of the child cart is a scissor structure.

Optionally, for the aforementioned child-mother cart assembly, wherein the main-mother cart housing also has a detachable structure, and the secondary-mother cart housing is detachable by the detachable structure The utility model is arranged above the main and mother stroller shells, so as to provide timely removal of the secondary main and mother cart shells from the main and mother cart shells.

Optionally, for the aforementioned mother-child cart assembly, wherein the secondary mother cart housing further has an insertion channel and an opening and closing structure, the insertion channel is connected to the accommodating space, and the opening and closing structure It is used to open and close the insertion channel. When operating in the first operation state, the sub-cart enters the accommodating space from the insertion channel first, and then, the opening and closing structure closes the insertion channel , So that the child cart is buried in the secondary mother cart case, when in the second operating state, the opening and closing structure opens the insertion channel, so that the child cart is pushed from the secondary mother The car body is exposed.

In addition, another main object of the present application is to provide a mother cart that can be pushed on a ground and operated on a first operating state, a second operating state or a third operating state, and also has to accommodate a A sub-cart, which has a sub-cart housing, a carrier, and a sub-handle, the carrier system is disposed on the sub-cart housing, the sub-handle is disposed on the sub-cart housing In the above, the female cart system includes: a main female cart shell, a female rolling mechanism, a female handle and a primary female cart shell, the female rolling mechanism is arranged in the main female cart shell, and has A female first wheel set, a female second wheel set and a female third wheel set; the female handle is set on the main female cart shell; the secondary female cart shell is set on the main female cart shell Above the body, there is an accommodating space; wherein, when operating in the first operating state, the sub-cart is accommodated in the accommodating space, the first female wheel set and the second female wheel set Or, both the first wheel set of the mother and the third wheel set of the mother are exposed from the main and mother cart shells and respectively touch the ground, and the main handle is exposed from the main and mother cart shells For pushing the mother cart to slide the child cart on the ground; when operating in the second operation state, the child cart is accommodated in the accommodating space, and the first wheel set of the mother The third wheel set of the mother is exposed from the shell of the main mother cart and respectively touches the ground, and the child handle is exposed from the shell of the child cart to push the child cart and then carry the mother cart Sliding on the ground; and when operating in the third operating state, the child stroller leaves the accommodating space so that the child stroller can be used alone outside the secondary mother cart housing, and the mother One wheel set and both the mother second wheel set, or both the mother first wheel set and the mother third wheel set, are exposed from the main mother cart shell and respectively touch the ground, and the mother handle It is exposed from the shell of the main mother cart to push the mother cart to slide on the ground.

Optionally, for the aforementioned female stroller, wherein the main female stroller housing further includes: a female second wheel set accommodating space, a female third wheel set accommodating space, and a female handle accommodating space ; When operating in the first and third operating states, the mother third wheel group enters the mother third wheel group accommodating space, so that the mother third wheel group is buried in the main mother cart housing, When operating in the second operating state, the female second wheel set enters the female second wheel set accommodating space so that the female second wheel set is buried in the main mother cart housing; the main mother The cart housing further has a female handle accommodating space, when in the second operation state, the female handle enters the female handle accommodating space, so that the female handle is buried in the main female cart shell body.

In addition, another main object of the present application is to provide a sub-cart that can be pushed on a ground and operated on a first operating state, a second operating state, or a third operating state In a female cart, the female cart has a main female cart shell, a female rolling mechanism, a female handle and a primary female cart shell, the female rolling mechanism is arranged in the main female cart shell Body, and has a female first wheel set, a female second wheel set and a female third wheel set, the female handle is set on the main female cart shell, the secondary female cart shell is set on the main The mother stroller shell is provided with an accommodating space. The child stroller includes: a child stroller shell, a child rolling mechanism, a carrying body and a child handle, and the child rolling mechanism is arranged on the child A cart casing with the sub-wheel set; the bearing system is arranged on the sub-cart casing; and the sub-handle is arranged on the sub-cart casing; wherein, the operation in the first operating state At this time, the sub-cart is accommodated in the accommodating space, the female first wheel set and the female second wheel set are exposed from the main female cart shell and respectively touch the ground, and the female handle is from the The main and mother cart shells are exposed for pushing the mother cart and the child cart to slide on the ground; when operating in the second operating state, the child cart is accommodated in the accommodating space In this case, the first wheel set and the third wheel set of the mother are exposed from the shell of the main and mother carts and respectively touch the ground, and the child handle is exposed from the shell of the child cart to push the child pushers Cart, and then slide the mother cart on the ground; and when operating in the third operating state, the child cart is separated from the accommodating space so that the child cart is in the secondary mother cart The shell is used alone, the sub-wheel set is exposed from the main sub-cart shell and touches the ground, and the sub-handle is exposed from the sub-cart shell to push the sub-cart and then carry the sub-push The car slides on the ground.

Optionally, for the aforementioned sub-cart, wherein the sub-cart further has: a lifting structure connected to the carrier; when operating in the first operating state or the third operating state , The lifting structure drives the carrier down to enter the sub-cart housing, when operating in the second operating state or the third operating state, the lifting structure drives the carrier to lift away from the sub The cart shell is exposed.

Optionally, for the aforementioned sub-cart, wherein the sub-cart housing further has: a sub-wheel group accommodating space, a sub-handle accommodating space; when operating in the first and second operating states , The sub-wheel group enters the sub-wheel group accommodating space, so that the sub-wheel group is buried in the sub-cart housing, so that the volume of the sub-cart is reduced and can be accommodated in the accommodating space; When in the first operating state, the sub-handle enters the sub-handle accommodating space, so that the sub-handle is buried in the sub-cart housing, so that the volume of the sub-cart can be reduced to accommodate the sub-cart In space.

Compared with the prior art, the present application provides a child-mother cart assembly and its mother cart and child cart, wherein the child-mother cart assembly has a mother cart and a child cart, and the present application uses a mother cart and a child cart With the use of the cart, it can be converted into a form suitable for the operating state according to different use situations, in order to adapt to different use situations. In other words, the child cart can be placed in the mother cart to use the mother cart Push the mother cart to make the child cart slide with the mother cart; or put the child cart in the same, but use the child handle of the child cart to push the child Cart, so that the mother cart can slide together with the child cart; or the mother cart and the child cart can be used separately, so the child-mother cart assembly and its mother cart and child The cart can have different operating states according to the actual use situation, and thus adapt to different use situations to solve the inconvenience of carrying the mother cart and the child cart with both hands when going out.

The following content will be used in conjunction with the drawings to illustrate the technical content of this application through specific specific embodiments. Those familiar with this technology can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied by other different specific embodiments. Various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the spirit of this application. In particular, the quantitative relationship, proportional relationship, and relative position of each element in the drawings are for exemplary purposes only, and do not represent the actual status of the implementation of this application.

For the child-mother cart assembly of the present application and its mother cart and child cart, wherein the mother cart can be used in combination with the child cart, or the mother cart and the child cart can be used separately, if When used in tourism, the mother stroller can also be designed as a suitcase, and the child stroller can be designed as a stroller. Through the design of this application, the stroller (that is, the child stroller) can be placed in the luggage ( I.e. mother stroller), so you can push the suitcase and the stroller placed in the suitcase with one hand to solve the inconvenience of carrying the suitcase and stroller with both hands when traveling, thereby reducing people’s travel Time burden.

For the technical disclosure of this application, please refer to FIGS. 1 to 12 in the drawings.

The mother-child cart assembly of the present application and its mother cart and child cart, wherein the mother cart 11 and the child cart 12 can be pushed on the ground with one hand, and the present application can be operated in different operating states In order to adapt to different use situations (the operation state is not described in detail here, please explain it later), as shown in FIGS. 1 to 5, the female cart 11 has a main female cart shell 111 , The female rolling mechanism 112, the female handle 113 and the secondary female cart housing 114, wherein the female rolling mechanism 112 and the female handle 113 are provided on the main female cart housing 111, and the main female cart housing 111 can be The material is made of PP material, PC material or cloth (the above materials are not limited to this), and the female rolling mechanism 112 has a female first wheel set 1121, a female second wheel set 1122 and a female third wheel set 1123. Furthermore, the female rolling mechanism 112 also has a female second wheel group accommodating space 1112, a female third wheel group accommodating space 1113, and a female handle accommodating space 1114, whereby the female first wheel group 1121 and the female first The second round group 1122 and the mother third round group 1123. The secondary female stroller shell 114 is disposed above the primary female stroller shell 111. The secondary female stroller shell 114 can be made of PP material, PC material or cloth surface (the above materials are not limited to this), The secondary mother cart housing 114 also has an accommodating space 115 to accommodate the child cart 12. In addition, as shown in FIG. 9, the secondary mother cart housing 114 also has an insertion channel 1141 and an opening and closing structure 1142. The insertion channel 1141 communicates with the accommodating space 115, and the opening and closing structure 1142 can be disposed on the secondary mother On the cart housing 114 (in the embodiment shown in FIG. 3, the opening and closing structure 1142 is disposed above the secondary mother cart housing 114, but it is not limited thereto. For example, the opening and closing structure 1142 may also be disposed on The left or right side of the secondary mother cart case 114), so that the opening and closing structure 1142 can have an open state and a closed state. When the opening and closing structure 1142 is in the open state, the child cart 12 can be inserted into the insertion channel 1141 from the opening of the secondary mother cart case 114 to be accommodated in the accommodating space 115, and the mother cart 11 and the child cart are completed A combination of 12. When the opening and closing structure 1142 is in a closed state (as shown in FIG. 3 ), the opening and closing structure 1142 closes the insertion channel 1141 so as to cover the accommodating space 115 and make the mother cart 11 more attractive.

Preferably, please refer to FIG. 9 as well. The main mother cart housing 111 also has a detachable structure 1111 composed of a snap structure, and the second mother cart housing 114 is detachable by the detachable structure 1111. Is installed above the main mother cart housing 111, when there is no need to use the second mother cart housing 114, to provide timely removal of the second mother cart housing 114 from the main mother cart housing 111, so that the main The mother cart housing 111 can be used alone, and reduces the weight of the main mother cart housing 111 to reduce the burden on the user.

Furthermore, as shown in FIGS. 6, 11 and 12, the sub-cart 12 has a sub-cart housing 121, a carrier 122, a sub-handle 123, a lifting structure 124 and a sub-rolling mechanism 125, wherein The cart 12 can be accommodated in the accommodating space 115 of the mother cart 11, the carrier 122 is disposed in the sub-cart housing 121, and the lifting structure 124 is connected to the carrier 122, and the lifting structure 124 can be a scissor leg Structure 1241 (not limited to this, the lifting structure 124 can be any structure that can be raised or lowered), so that the carrier 122 can be buried in or away from the accommodating space 115, and the sub handle 123 and the sub rolling mechanism 125 are disposed in On the sub-cart housing 121, the sub-rolling mechanism 125 has a sub-wheel group 1251.

Correspondingly, the sub-cart housing 121 can also be provided with a sub-wheel group accommodating space 1212 and a sub-handle accommodating space 1213, so that the sub-wheel group 1251 can be buried in the sub-wheel group accommodating space 1212, thereby allowing the sub-cart 12 The volume is reduced and can be accommodated in the accommodating space 115, and the sub-handle 123 can be embedded in the sub-handle accommodating space 1213, so that the sub-handle 123 is embedded in the sub-cart housing 121, so that the volume of the sub-cart 12 is reduced It can be accommodated in the accommodating space 115.

This application can be operated in the first operation state, the second operation state or the third operation state according to the usage situation at the time. The following will explain the application of the application in the first operation state, the second operation state or the third operation state operating.

Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 11 together, when operating in the first operating state, the sub-wheel group 1251 enters the sub-wheel group accommodating space 1212 so that the sub-wheel group 1251 is buried in the sub-cart The housing 121, and the sub-handle 123 enters the sub-handle accommodating space 1213, so that the volume of the sub-cart 12 can be reduced to be accommodated in the accommodating space 115. At this time, the lifting structure 124 of the sub-cart 12 can be driven The carrier 122 is lowered and enters the accommodating space 115 of the mother cart 11 from the insertion channel 1141. Then, the opening and closing structure 1142 closes the insertion channel 1141 so that the child cart 12 is buried in the secondary mother cart shell 114 in. In the first operating state, the female first wheel set 1121 and the female second wheel set 1122 can be exposed from the main mother cart shell 111 and contact the ground respectively to provide the driving mother cart 11, so that The exposed female handle 113 on the cart housing 111 can push the female cart 11 and the child cart 12 to slide on the ground. In other words, in the first operating state, the secondary mother cart case 114 is placed on the primary mother cart case 111, and the child cart 12 is buried in the secondary mother cart case 114, and the mother is used The mother handle 113 of the cart 11 pushes the mother cart 11 and then slides together with the child cart 12, and the mother cart 11 and the child cart 12 can be pushed with one hand. In the first operating state, the mother third wheel group 1123 has no effect, so the mother third wheel group 1123 can be entered into the mother third wheel group accommodating space 1113, so that the mother third wheel group 1123 is buried in the master mother push The vehicle casing 111 prevents the exposed female third wheel set 1123 from affecting the operation. Preferably, the first female wheel set 1121 and the third female wheel set 1123 can be exposed from the mother cart housing 111 and contact the ground respectively, and the female handle 113 can be exposed from the mother cart housing 111. Preferably, as shown in FIG. 14, the female handle 113 on the main and mother cart shell 111 with the sub-cart 12 exposed is inclined so as to conform to the user's body and facilitate the user to push the mother cart 11 .

Please refer to FIG. 8 to FIG. 12 together, when operating in the second operating state, the sub-wheel set 1251 enters the sub-wheel set accommodating space 1212, so that the sub-wheel set 1251 is buried in the sub-cart housing 121, allowing The volume of the sub-cart 12 is reduced and can be accommodated in the accommodating space 115, and the lifting structure 124 of the sub-cart 12 can drive the carrier 122 to lift away from the accommodating space 115 of the mother cart 11 to be exposed For carrying objects, at this moment, the opening and closing structure 1142 opens the insertion channel 1141, so that the carrier 122 of the child cart 12 can be exposed from the secondary mother cart case 114. In addition, the child handle 123 protrudes from the upper handle accommodation space 1213 of the child cart housing 121, and is exposed for pushing the child cart 12 to slide the mother cart 11 on the ground. In the second operating state, the female first wheel set 1121 and the female third wheel set 1123 are exposed on the main mother cart housing 111 and contact the ground respectively, and the female second wheel set 1122 can enter the female The second wheel set accommodating space 1112, so that the female second wheel set 1122 is buried in the main mother cart housing 111, similarly, the female handle 113 can enter the female handle accommodating space 1114 because of no effect, so that the female handle 113 Buried in the main mother cart housing 111, in other words, in the second operating state, the second mother cart housing 114 is placed on the main mother cart housing 111, and the carrier 122 of the child cart 12 is lifted From the secondary mother cart shell 114 exposed for carrying objects, and using the child handle 12 exposed by the child cart 12 to push the child cart 12, and then slide the mother cart 11 together, so that the mother The cart 11 and the sub-cart 12 can work together.

Please refer to FIG. 1, FIG. 2, FIG. 5 and FIG. 9 together, when the mother cart 11 is operated in the third operating state, the child cart 12 is separated from the accommodating space 115 in the secondary mother cart housing 114, so that The child cart 12 must be used separately from the secondary mother cart shell 114, that is, the mother cart 11 and the child cart 12 can be used separately, and the mother first wheel set 1121 and the mother second of the mother cart 11 The wheel set 1122 is exposed on the main female stroller housing 111 and contacts the ground, respectively, and the female handle 113 is exposed on the main female stroller housing 111 for pushing the female stroller 11 to slide on the ground. In addition, in the third operating state, the mother third wheel set 1123 enters the mother third wheel set accommodating space 1113 due to no effect, so that the mother third wheel set 1123 is buried in the main mother cart housing 111 to avoid The exposed female third wheel set 1123 affects the operation of the female stroller 11 and is aesthetically pleasing. Preferably, the female first wheel set 1121 and the female third wheel set 1123 are exposed from the main female cart housing 111. Preferably, as shown in FIG. 13, the female handle 113 on the main and mother cart housing 111 where the sub-cart 12 is not exposed is inclined to conform to the user's body and facilitate the user to push the mother cart 11.

Please refer to FIG. 6 and FIG. 9 together, when the child cart 12 is operated in the third operating state, the child cart 12 can leave the accommodating space 115 so that the child cart 12 must be outside the secondary mother cart housing 114 Used alone, at this time, the lifting structure 124 of the sub-cart 12 can drive the carrier 122 to lift up and leave the sub-cart housing 121 to expose to provide a load-bearing object. In addition, the sub-wheel set 1251 is from the sub-cart housing 121 is exposed to the ground, and the sub handle 123 is exposed from the sub-cart housing 121 to push the sub-cart 12 so that the sub-cart 12 can slide on the ground through the sub-handle 123 and the sub-wheel group 1251. Furthermore, when the sub-cart 12 is operated in the third operating state, the lifting structure 124 can also drive the carrier 122 to lower into the sub-cart housing 121, thereby reducing the volume of the sub-cart 12 and providing an easy storage effect.

In summary, the present application provides a child-mother cart assembly and its mother cart and child cart, wherein the child-mother cart assembly has a mother cart and a child cart. If used in tourism, it can also be used The mother stroller is designed as a suitcase, and the child stroller is designed as a stroller, and the stroller can be placed in the suitcase. In this way, the stroller can be driven at the same time by only pushing the suitcase with one hand, so that there is idle The hands can be free to reduce the burden on people, and to solve the problem that people often need to push the suitcase with one hand while traveling, and also have to use the other hand to push the idle stroller. Inconvenience caused by carrying luggage and stroller separately.

In addition, the child-mother cart assembly of the present application and the usage scenarios of the mother cart and the child cart are diverse, for example, the child cart can be placed in the mother cart and pushed with one hand using the mother handle of the mother cart The mother cart, and then slide with the child cart, and the idle hand can be free, so as to reduce the burden on the user; or, the child cart can be placed in the mother cart, using the child cart The carrier bears the object, and uses the child handle of the child cart to push the child cart with one hand, and then slides together with the mother cart, so that the child cart can be used to carry the object; The sub-carts are separated, and can be used separately to increase the flexibility of use. In this way, the application can change its operating state according to the current use situation, thereby adapting to different use situations.

The above-mentioned embodiments are only illustrative of the principles and effects of the present application, not intended to limit the present application. Anyone who is familiar with this technology can modify and change the above embodiments without departing from the spirit and scope of this application. Therefore, the scope of protection of the rights of this application should be as listed in the scope of patent applications of this application.

1: Mother and son stroller components

11: Mother cart

111: main and mother cart shell

1111: Removable structure

1112: Female second round group accommodation space

1113: Female third round group accommodation space

1114: Female handle housing space

112: Female rolling mechanism

1121: Female first round group

1122: Female second round group

1123: Female third round group

113: Female handle

114: secondary mother cart shell

1141: Insert channel

1142: opening and closing structure

115: accommodating space

12: Sub-cart

121: Sub-cart housing

1212: Sub-wheel group accommodation space

1213: child handle accommodation space

122: carrier

123: child handle

124: Lifting structure

1241: Scissor foot structure

125: Sub-rolling mechanism

1251: Sub-wheel group

FIG. 1 is a perspective view of the mother cart of the present application.

Fig. 2 is a diagram of the state of use of the mother cart of the present application.

Figure 3 is an exploded view of the mother cart of the present application.

Fig. 4 is a perspective view of the main mother cart housing in the mother cart.

FIG. 5 is another perspective view of FIG. 4.

Figure 6 is a perspective view of a sub-cart.

FIG. 7 is a diagram of the first use state of the mother-child cart assembly.

FIG. 8 is a diagram of the second state of use of the mother-child cart assembly.

Fig. 9 is an exploded view of Fig. 8.

FIG. 10 is a third usage state diagram of the mother-child cart assembly.

Fig. 11 is a perspective view of Fig. 8.

Fig. 12 is a perspective view of Fig. 10.

Fig. 13 is a fourth state diagram of the mother cart.

Fig. 14 is a diagram of the fifth use state of the mother-child cart assembly.

1: Mother and son stroller components

11: Mother cart

111: main and mother cart shell

1111: Removable structure

1112: Female second round group accommodation space

112: Female rolling mechanism

1121: Female first round group

1122: Female second round group

1123: Female third round group

113: Female handle

114: secondary mother cart shell

1141: Insert channel

1142: opening and closing structure

115: accommodating space

12: Sub-cart

121: Sub-cart housing

1212: Sub-wheel group accommodation space

122: carrier

123: child handle

125: Sub-rolling mechanism

1251: Sub-wheel group

Claims (9)

A child-mother cart assembly, which must be pushed on a ground and operated in a first operating state or a second operating state, includes: a mother cart, having: a main mother cart housing; one A female rolling mechanism, which is provided in the main female cart housing, and has a female first wheel set, a female second wheel set and a female third wheel set; a female handle, the female handle is It is arranged on the main and mother stroller shells; and the primary mother and stroller shells are arranged above the main and mother stroller shells and have an accommodating space; and a child stroller, the The sub-cart is accommodated in the accommodating space, and has: a sub-cart housing; a carrier body, the bearing system is disposed on the sub-cart housing; and a sub-handle, the sub-handle is disposed on the On the sub-cart; where, when operating in the first operating state, both the mother first wheel set and the mother second wheel set, or the mother first wheel set and the mother third wheel set Both are exposed from the main and mother cart shells and respectively touch the ground, and the female handle is exposed from the main and mother cart shells to push the mother cart with the child cart on the ground Sliding; when operating in the second operating state, the female first wheel set and the female third wheel set are exposed from the main and mother cart shells and respectively touch the ground, and the child handle is pushed from the child The car shell is exposed to push the child cart, and then slide the mother cart on the ground. The secondary mother cart shell also has an insertion channel and an opening and closing structure, the insertion channel is connected to the accommodating space, the opening and closing structure is used to open and close the insertion channel, when the first operation During the operation in the state, the child stroller first enters the accommodating space from the placement channel, and then, the opening and closing structure closes the placement channel so that the child stroller is buried in the secondary mother cart case When operating in the second operating state, the opening/closing structure opens the insertion channel so that the child stroller is exposed from the casing of the secondary mother stroller. The child-mother cart assembly as described in item 1 of the patent application scope, wherein the child cart further comprises: a lifting structure, the lifting structure is connected to the carrier; when operating in the first operating state, the lifting The structure drives the carrier downward to enter the accommodating space. When operating in the second operating state, the lifting structure drives the carrier to lift up and leave the accommodating space to be exposed. The child-mother cart assembly as described in item 2 of the patent application scope, wherein the lifting structure of the child cart is a scissor structure. The child-mother cart assembly as described in item 1 of the patent application scope, wherein the main-mother cart housing also has a detachable structure, and the second-mother cart housing is detachable by the detachable structure The method is arranged above the main and mother cart shells, so as to provide timely removal of the second main and mother cart shells from the main and mother cart shells. A mother cart must be pushed on the ground and operated on a first operating state, a second operating state or a third operating state, and a child cart must be accommodated, the child cart is provided with a A sub-cart shell, a carrying body, and a sub-handle, the bearing system is disposed on the sub-cart housing, the sub-handle is disposed on the sub-cart housing, and the female cart system includes: a main Mother cart shell; A female rolling mechanism, which is arranged in the main and female cart shells, and has a female first wheel set, a female second wheel set and a female third wheel set; a female handle, the female handle It is arranged on the main and mother cart shell; the primary mother and cart shell is arranged above the main and mother cart shell and has a containing space; wherein, when operating in the first operation state, The child stroller is accommodated in the accommodating space, and both the mother first wheel group and the mother second wheel group, or both the mother first wheel group and the mother third wheel group, are from the main The shell of the mother cart is exposed to contact the ground, and the female handle is exposed from the shell of the main mother cart to push the mother cart to slide the child cart on the ground; when the second During the operation in the operation state, the sub-cart is accommodated in the accommodating space, and the female first-wheel set and the female third-wheel set are exposed from the main female cart shell to respectively contact the ground, and The child handle is exposed from the child cart housing to push the child cart, and then slide the mother cart on the ground; and when operated in the third operating state, the child cart is Leaving the accommodating space, the child stroller must be used separately outside the secondary mother stroller shell, and both the mother first wheel group and the mother second wheel group, or the mother first wheel group and the mother Both of the third wheel set are exposed from the main and mother cart shells and respectively touch the ground, and the female handle is exposed from the main and mother cart shells to push the mother cart to slide on the ground. The female stroller as described in item 5 of the patent application scope, wherein the main female stroller housing further includes: a female second wheel set accommodating space, a female third wheel set accommodating space and a female handle Space; when operating in the first and third operating states, the female third wheel set enters the female third wheel set accommodating space, so that the female third wheel set is buried in the main female cart shell When operating in the second operating state, the female second wheel set enters the female second wheel set accommodating space so that the female second wheel set is buried in the main female cart shell The body of the main mother cart also has: a female handle accommodating space, when operating in the second operating state, the female handle enters the female handle accommodating space, so that the female handle is buried in the Main and mother cart shell. A sub-cart must be pushed on the ground and operated on a first operating state, a second operating state or a third operating state, and must also be accommodated in a mother cart, which It has a main female cart shell, a female rolling mechanism, a female handle and a primary female cart shell. The female rolling mechanism is arranged on the main female cart shell and has a female first wheel set, A female second wheel set and a female third wheel set, the female handle is arranged on the main female cart shell, the secondary female cart shell is arranged above the main female cart shell, and has a capacity The sub-cart system includes: a sub-cart housing; a sub-roller mechanism, which is provided on the sub-cart housing and has a sub-wheel set; and a carrier body, the carrier system Disposed on the sub-cart housing; and a sub-handle, which is disposed on the sub-cart housing; wherein, when operated in the first operating state, the sub-cart is accommodated in the Accommodating space, the female first wheel set and the female second wheel set are exposed from the main and mother cart shells and respectively touch the ground, and the female handle is exposed from the main and mother cart shells for pushing The mother stroller slides on the ground with the child stroller; when operating in the second operating state, the child stroller is accommodated in the accommodating space, the first wheel set of the mother and the mother The third wheel set is exposed from the shell of the main and mother carts and respectively touches the ground, and the child handle is exposed from the shell of the child cart to push the child cart and then take the mother cart on the Sliding on the ground; and when operating in the third operating state, the child stroller leaves the accommodating space so that the child stroller can be used alone outside the secondary mother cart housing, the child wheel group is The sub-cart housing is exposed and in contact with the ground The sub-handle is exposed from the sub-cart housing to push the sub-cart, and then slide the sub-cart on the ground. The sub-cart as described in item 7 of the patent application scope, wherein the sub-cart further has: a lifting structure connected to the carrier; the operation in the first operating state or the third operating state At this time, the lifting structure drives the carrier down to enter the sub-cart housing. When operating in the second operating state or the third operating state, the lifting structure drives the carrier to lift away from the The sub-cart housing is exposed. The sub-cart as described in item 7 of the patent application scope, wherein the sub-cart housing further includes: a sub-wheel group accommodating space and a sub-handle accommodating space; the operations in the first and second operating states At this time, the sub-wheel group enters the sub-wheel group accommodating space, so that the sub-wheel group is buried in the sub-cart housing, so that the volume of the sub-cart is reduced and can be accommodated in the accommodating space When in the first operating state, the sub-handle enters the sub-handle accommodating space, so that the sub-handle is buried in the sub-cart housing, so that the volume of the sub-cart is reduced and can be accommodated in the Accommodating space.

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