CN113479253B

CN113479253B - Method for unfolding and folding infant carrying device

Info

Publication number: CN113479253B
Application number: CN202110792392.XA
Authority: CN
Inventors: 吴海涛
Original assignee: China Wonderland Nurserygoods Co Ltd
Current assignee: China Wonderland Nurserygoods Co Ltd
Priority date: 2017-10-18
Filing date: 2017-10-18
Publication date: 2023-05-26
Anticipated expiration: 2037-10-18
Also published as: CN113479253A; CN109677481B; CN109677481A

Abstract

The invention provides a method for unfolding and folding an infant carrying device, which comprises the following steps: providing a handrail, a backrest, a shank rest and a locking mechanism, pivoting the handrail with the backrest, pivoting the shank rest with the backrest, and arranging the locking mechanism between the handrail and the shank rest; the lower leg rest is driven to rotate and unfold relative to the backrest, so that the lower leg rest drives the locking mechanism to lock the armrest to rotate relative to the backrest, and the armrest is fixed in an unfolded state; or the lower leg rest is driven to rotate and retract relative to the backrest, so that the lower leg rest drives the locking mechanism to release the locking of the armrest to rotate relative to the backrest, and the armrest is synchronously retracted along with the lower leg rest. In the unfolding and folding method of the infant carrying device, the armrests can be folded synchronously along with the lower leg rest, so that the infant carrying device and the armrests can be folded by one-time operation, the operation is simple and convenient, the volume of the infant carrying device after folding is smaller, the infant carrying device and the infant carrying device are convenient to carry and transport, and the infant carrying device has high practicability.

Description

Method for unfolding and folding infant carrying device

The application is a divisional application with the application number of 201710978445.0 and the application date of 2017, 10 and 18, and the invention creates a baby carrying device and a shank rest and armrest linkage lock release mechanism.

Technical Field

The present invention relates to infant carrier apparatuses, and particularly to an unfolding and folding method for an infant carrier apparatus.

Background

In the design of the frame structure of a common infant carrier, in order to meet the practicality and portability required by consumers, the frame of the infant carrier is generally designed to be foldable, so that the infant carrier can be unfolded into the infant carrier when in use, and can be folded into a smaller volume when not in use, so as to be convenient for storage or carrying. The most commonly used technical means for realizing the folding of the frame of the infant carrying device is to add a lock release mechanism (i.e. folding mechanism) on the basis of improving the structure of the infant carrying device, and lock or unlock the frame of the infant carrying device by using the lock release mechanism so as to achieve the aim of unfolding or folding the infant carrying device.

However, in the prior art, when most infant carriers are folded, the armrests of the frame cannot be folded, or the armrests need to be detached from the frame before folding, so that folding operation is extremely complicated.

Therefore, it is necessary to provide a method for unfolding and folding the infant carrier with easy operation and synchronous folding of the armrests along with the calf rest.

Disclosure of Invention

The invention aims to provide an unfolding and folding method of an infant carrying device, which is simple and convenient to operate and can be synchronously folded along with the calf rest.

In order to achieve the above object, the present invention provides a method for unfolding and folding an infant carrier, comprising: the lower leg rest is driven to rotate and unfold relative to the backrest, so that the lower leg rest drives the locking mechanism to lock the armrest to rotate relative to the backrest, and the armrest is fixed in an unfolded state; or the lower leg rest is driven to rotate and fold relative to the backrest, so that the lower leg rest drives the locking mechanism to release the locking handrail to rotate relative to the backrest, and the handrail is synchronously folded along with the lower leg rest; wherein, the armrest is pivoted with the backrest, the shank backrest is pivoted with the backrest, and the locking mechanism is arranged between the armrest and the shank backrest.

Preferably, a armrest fixing piece is connected to the armrest, a backrest fixing piece is connected to the backrest, a shank rest fixing piece is connected to the shank rest, the armrest fixing piece is pivoted with the backrest fixing piece, and the shank rest fixing piece is pivoted with the backrest fixing piece.

Preferably, the locking mechanism comprises a positioning pin, one end of the positioning pin is elastically and eccentrically abutted against the shank rest fixing piece, the other end of the positioning pin is opposite to the shank rest fixing piece, and the positioning pin is inserted into the shank rest fixing piece to be locked or withdrawn from the shank rest fixing piece to release the lock through the change of the abutting position of the positioning pin and the shank rest fixing piece relative to the rotation center distance of the shank rest fixing piece.

Preferably, the contact part of the positioning pin and the shank rest fixing piece is designed into an arc-shaped structure.

Preferably, the positioning pin is connected with the positioning block, so that the positioning pin is abutted against the shank rest fixing piece through the positioning block.

Preferably, a third chute is formed on the positioning block, and the positioning pin is slidably clamped in the third chute, so that the positioning block and the positioning pin are slidably arranged.

Preferably, the shank rest fixing piece is arranged into an eccentric structure, and the positioning pin is in contact with different positions of the shank rest fixing piece, so that the positioning pin is inserted into the armrest fixing piece to lock or is withdrawn from the armrest fixing piece to release the lock.

Preferably, the shank rest fixing piece comprises a body, wherein the body is provided with a blocking rib protruding outwards, and the blocking rib and the body form an eccentric structure; when the locating pin is abutted against the blocking rib, the locating pin is inserted into the handrail fixing piece to be locked; when the locating pin is abutted against the body, the locating pin withdraws from the armrest fixing piece to release the lock.

Preferably, a first chute for sliding the positioning pin is formed on the backrest fixing member, so that the positioning pin performs locking or unlocking action under the guiding action of the first chute.

Preferably, a first elastic component is arranged between the positioning pin and the back fixing piece in a compressed mode, and the positioning pin is biased in the unlocking direction through the first elastic component, so that the positioning pin is always in elastic abutting connection with the calf back fixing piece through the first elastic component.

Compared with the prior art, the rotation of the shank rest of the invention drives the locking mechanism to lock or unlock the rotation of the armrest relative to the backrest; when the unfolded infant carrying device is folded, the lower leg rest rotates relative to the backrest by folding the lower leg rest, the locking mechanism is unlocked by the rotation of the lower leg rest, namely the locking mechanism releases the rotation of the armrest relative to the backrest, so that the armrest automatically rotates relative to the backrest under the action of gravity, and the armrest is synchronously folded along with the lower leg rest; when the folded infant carrying device is unfolded, the lower leg rest is rotated relative to the backrest by virtue of the unfolding of the lower leg rest, and when the lower leg rest is rotated to an unfolded state, the locking mechanism locks the rotation of the armrests, namely the locking mechanism locks the rotation of the armrests relative to the backrest, so that the armrests are fixed to the unfolded state, and an infant on the infant carrying device seat is protected; therefore, in the unfolding and folding method of the infant carrying device, the armrests can be folded synchronously along with the calf rest, so that the infant carrying device can be folded by one operation, the operation is simple and convenient, the volume is smaller after folding, the infant carrying device is convenient to carry and transport, and the infant carrying device has strong practicability.

Drawings

FIG. 1 is a schematic view of the infant carrier of the present invention in an expanded configuration.

Fig. 2 is a schematic view of the structure of the shank rest and the armrest of the invention locked by the shank rest and armrest interlocking release mechanism.

Fig. 3 is another angular structure diagram of fig. 2.

Fig. 4 is another angular structure diagram of fig. 3.

Fig. 5 is a schematic view of the structure of fig. 3 with the decorative cover removed.

Fig. 5a is an enlarged schematic view of the portion a in fig. 5.

Fig. 6 is a schematic side view of fig. 5.

Fig. 7 is a schematic view showing a state in which the locking mechanism of fig. 5 is inserted into the armrest fixing member to be locked.

Fig. 7a is an enlarged schematic view of the portion B in fig. 7.

Fig. 8 is a schematic view of the structure of the shank rest and the armrest of the invention for unlocking the shank rest by the interlocking unlocking mechanism.

Fig. 8a is an enlarged schematic view of the portion C in fig. 8.

Fig. 9 is a schematic view of the calf rest, armrest and backrest of fig. 8 fully collapsed.

Fig. 10 is a schematic view showing a state that the locking mechanism in fig. 8 is withdrawn from the armrest fixing member to release the lock.

Fig. 10a is an enlarged schematic view of the portion D in fig. 10.

Detailed Description

In order to describe the technical content and constructional features of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

Referring to fig. 1-10 a, the infant carrier 100 of the present invention includes an armrest 101, a backrest 102, a leg rest 103, a seat 104, and a leg rest and armrest interlocking release mechanism 10, wherein the leg rest and armrest interlocking release mechanism includes an armrest fixing member 11, a backrest fixing member 12, a leg rest fixing member 13, and a locking mechanism 14, the armrest fixing member 11 is connected to the armrest 101, the backrest fixing member 12 is connected to the backrest 102, the armrest fixing member 11 is pivotally connected to the backrest fixing member 12, the leg rest fixing member 13 is connected to the leg rest 103, the leg rest fixing member 13 is pivotally connected to the backrest fixing member 12, the locking mechanism 14 is disposed between the armrest fixing member 11 and the leg rest fixing member 13, such that the leg rest fixing member 11 and the leg rest fixing member 13 are interlocked by the locking mechanism 14, and when the leg rest fixing member 13 rotates in a deployment direction (in an arrow G direction in fig. 8), the leg rest fixing member 13 locks the rotation of the locking mechanism 14 relative to the armrest fixing member 12, such that the armrest fixing member 11 and the infant connected thereto are fixed to the seat 101 (in a deployed state shown in fig. 1-7); when the shank rest fixing member 13 rotates in the folding direction (the direction of arrow F in fig. 1, the folding direction is opposite to the unfolding direction), the shank rest fixing member 13 drives the locking mechanism 14 to release the rotation of the armrest fixing member 11 relative to the backrest fixing member 12, so that the armrest fixing member 11 can rotate relative to the backrest fixing member 12, and the armrest 101 and the shank rest 103 can be folded for carrying and transportation; the specific locking and unlocking is described as follows:

it should be noted that the infant carrier provided by the present invention can be a stroller, a high chair or other infant carrier with the above features.

When the armrest 101 and the calf rest 103 of the infant carrier 100 shown in fig. 1-7 are folded, force is applied along the direction of arrow F in fig. 1 to enable the calf rest 103 to approach the armrest 101, the calf rest 13 rotates relative to the backrest fixing member 12 by folding the calf rest 103, the rotation of the calf rest fixing member 13 enables the locking mechanism 14 to unlock the armrest fixing member 11, namely the locking mechanism 14 releases the rotation of the armrest fixing member 11 relative to the backrest fixing member 12, so that the armrest fixing member 11 and the armrest 101 connected thereto automatically rotate relative to the backrest fixing member 12 under the action of gravity to realize synchronous folding of the armrest 101 (the state diagram of the armrest synchronous folding of the calf rest is shown in fig. 9-10 a).

When the folded armrest 101 and the calf rest 103 shown in fig. 8 to 10 are unfolded, the calf rest 103 is unfolded by applying a force in the direction of arrow G in fig. 9, the calf rest 13 is rotated relative to the back rest 12 by the unfolding of the calf rest 103, and when the calf rest 13 is rotated to the unfolded state (i.e., as shown in fig. 1 to 7), the locking mechanism 14 locks the rotation of the armrest fixing 11, i.e., the locking mechanism 14 locks the rotation of the armrest fixing 11 relative to the back rest fixing 12, so that the armrest fixing 11 and the armrest 101 connected thereto are fixed to the unfolded state, thereby protecting the infant on the seat 104 of the infant carrying device 100.

As shown in fig. 2-5, the infant carrier 100 of the present invention further includes an elastic member 106, wherein the elastic member 106 is disposed across the seat 104; the elastic member 106 can effectively increase the shock absorption of the seat 104, and in particular, the elastic member 106 is an elastic rope, such as a steel rope, a webbing, or the like.

As shown in fig. 2-5, the elastic member 106 of the present invention is preferably in a bent structure, and the supporting area of the elastic member 106 in the seat 104 is effectively increased by the elastic member 106 in the bent structure, so as to further improve the shock absorption and the supporting performance of the seat 104.

The calf shank and armrest interlock release mechanism 10 of the present invention is described in further detail below with reference to fig. 1-10 a:

as shown in fig. 1-10 a, specifically, the calf rest and armrest interlocking release mechanism 10 of the present invention includes an armrest fixing member 11, a backrest fixing member 12, a calf rest fixing member 13, and a locking mechanism 14, wherein the backrest fixing member 12 is used for connecting a backrest 102 of the infant carrier 100; the armrest fixing piece 11 is used for connecting an armrest 101 of the infant carrying device 100, and the armrest fixing piece 11 is rotatably arranged on the back fixing piece 12; the shank rest fixing piece 13 is used for connecting a shank rest 103 of the infant bearing device 100, and the shank rest fixing piece 13 is rotatably arranged on the back rest fixing piece 12; the locking mechanism 14 is connected between the armrest fixing member 11 and the shank fixing member 13, and the rotation of the shank fixing member 13 drives the locking mechanism 14 to lock or unlock the rotation of the armrest fixing member relative to the backrest fixing member 12, that is, when the infant carrying device is in the unfolded shape as shown in fig. 1-7, the rotation of the armrest fixing member 11 relative to the backrest fixing member 12 is locked by the locking mechanism 14, so that the armrest fixing member 11 cannot rotate relative to the backrest fixing member 12 and is fixed in the unfolded shape, thereby the armrest 101 connected thereto can only be fixed in the unfolded shape, and further a stable protection function is provided for an infant; when the infant carrier is in the folded state shown in fig. 8-10, the rotation of the armrest fixing member 11 locked by the locking mechanism 14 relative to the backrest fixing member 12 is released, so that the armrest fixing member 11 can rotate relative to the backrest fixing member 12 again to be folded, thereby enabling the armrest 101 and the calf rest 103 to be folded, and further facilitating carrying and transportation.

As shown in fig. 5 to 10a, in order to further improve the practicality and the simplicity of the structure of the present invention, the locking mechanism 14 of the present invention is connected with the armrest fixing member 11 in a plug-in manner, the rotation of the lower leg fixing member 13 in the unfolding direction drives the locking mechanism 14 to be inserted into the armrest fixing member 11 to achieve locking, and the rotation of the lower leg fixing member 13 in the folding direction drives the locking mechanism 14 to withdraw from the inserted armrest fixing member 11, so that the rotation of the lower leg fixing member 13 drives the locking mechanism 14 to be inserted into the armrest fixing member 11 to lock or withdraw from the armrest fixing member 11 to release the lock.

As shown in fig. 5a, 7a, 8a and 10a, the locking mechanism 14 of the present invention is elastically and in abutting connection with the shank fixing member 13, so that when the locking mechanism 14 locks the armrest fixing member 11, the locking mechanism 14 can be more firmly locked by the elastic abutting connection between the locking mechanism 14 and the shank fixing member 13; specifically, the locking mechanism 14 of the present invention is elastically and eccentrically connected with the shank rest fixture 13, and by utilizing the characteristics of the eccentric structure, the locking mechanism 14 is inserted into the armrest fixture 11 to lock or withdrawn from the armrest fixture 11 to release the lock by the change of the distance between the abutting position of the locking mechanism 14 and the shank rest fixture 13 relative to the rotation center P of the shank rest fixture 13; more specifically, as shown in connection with fig. 5a and 8a, fig. 5a shows a locked state in which the locking mechanism 14 is inserted into the armrest mount 11, and the position in which the locking mechanism 14 collides with the calf rest mount 13 is located in the region D; fig. 8a shows the release of the locking mechanism 14 from the armrest mount 11, in which the position of interference of the locking mechanism 14 with the calf rest mount 13 is in region E; as is clear from the combination of fig. 5a and fig. 8a, the distance between the D area and the rotation center P is different from the distance between the E area and the rotation center P, that is, the position where the locking mechanism 14 collides with the shank rest fixture 13 changes from the locking state of the D area to the unlocking state of the E area or from the unlocking state of the E area to the locking state of the D area, and the distance between the locking mechanism 14 collides with the shank rest fixture 13 changes relative to the rotation center P of the shank rest fixture 13, and an eccentric structure is formed due to the change of the distance, so that the locking mechanism 14 locks and unlocks the handrail fixture 11, and the structure is simple and practical.

Referring to fig. 5 to 10a, the locking mechanism 14 of the present invention includes a positioning pin 141, wherein one end of the positioning pin 141 is elastically and eccentrically abutted against the shank fixing member 13, and the other end of the positioning pin 141 is opposite to the shank fixing member 11, and by means of the change of the distance between the abutting position of the positioning pin 141 and the shank fixing member 13 relative to the rotation center P of the shank fixing member 12, the positioning pin 141 is inserted into the shank fixing member 11 to lock or withdraw from the shank fixing member 11 to release the lock, specifically, the shank fixing member 11 is provided with a locking hole 111 for inserting the positioning pin 141, and the insertion locking and the withdrawal releasing of the shank fixing member 11 are realized by means of the positioning pin 141, so that the locking mechanism is simple and reliable in structure, and is fast and convenient to operate; it should be noted that, the positioning pin 141 of the present invention may be further connected to other components (such as a positioning block 143 mentioned below), and the positioning pin 141 is inserted into the armrest fixing member 11 to lock or withdrawn from the armrest fixing member 11 to release the lock by directly abutting against the lower leg rest fixing member 13; more specifically, when the present invention directly collides with the shank rest fixing member 13 through the positioning pin 141, the position where the positioning pin 141 collides with the shank rest fixing member 13 is in an arc structure, and by means of the mutually matched arc structures, the operation is smoother when switching between a locking shape (i.e. an unfolding shape) and a releasing shape (i.e. a folding shape); when the positioning pin 141 of the present invention directly abuts against the shank rest fixture 13 by the other connected component, the same other component has an arc-shaped structure where it abuts against the shank rest fixture 13.

Referring to fig. 5a, 7a, 8a and 10a, the shank rest fixture 13 of the present invention includes a body 131, wherein the body 131 has a blocking rib 132 protruding outwards in an arc shape, and the blocking rib 132 and the body 131 form an eccentric structure; when the abutting position of the positioning pin 141 of the locking mechanism 14 against the handrail fixing element 11 is located on the blocking rib 132, that is, the abutting position of the positioning pin 141 against the handrail fixing element 11 is located on the area D shown in fig. 5a and 10a, the positioning pin 141 is inserted into the locking hole 111 of the handrail fixing element 11 to be locked; when the position of the positioning pin 141 of the locking mechanism 14 abutting against the handrail fixing element 11 is located on the body 131, that is, the position of the positioning pin 141 abutting against the handrail fixing element 11 is located in the E region shown in fig. 7a and 8a, the positioning pin 141 is withdrawn from the locking hole 111 of the handrail fixing element 11 to release the lock.

As shown in fig. 8 and 10a, when the positioning pin 141 collides with the shank rest fixing member 13 with an eccentric structure at different positions, the positioning pin 141 is inserted into or withdrawn from the locking hole 111 to lock or unlock the handrail fixing member 11, so that the positioning pin 141 of the present invention has displacement capability, and in order to make the displacement capability of the positioning pin 141 for inserting into or withdrawing from the locking hole 111 smoother and more accurate, the backrest fixing member 12 of the present invention is provided with the first sliding groove 121 for sliding the positioning pin 141, and the positioning pin 141 can more accurately perform locking or unlocking operation under the guiding action of the first sliding groove 121.

Referring to fig. 5a, 7a, 8a and 10a, the locking mechanism 14 of the present invention further includes a first elastic component 142, where the first elastic component 142 is disposed between the positioning pin 141 and the back rest fixing member 12 in a compressed manner, and the first elastic component 141 biases the positioning pin 141 in the unlocking direction, so that the positioning pin 141 is in a compressed state in either the unlocking state or the locking state, and therefore the positioning pin 141 is always elastically connected with the calf rest fixing member 12 in an abutting manner by the first elastic component 142, and the change of the abutting positions of the first elastic component and the second elastic component realizes the locking and unlocking functions of the armrest fixing member 11.

Referring to fig. 5a, 7a, 8a and 10a, the locking mechanism 14 of the present invention further includes a positioning block 143, and the positioning pin 141 is convexly connected to one side of the positioning block 143; specifically, the positioning block 143 and the positioning pin 141 are slidably disposed, a third chute 141a is formed on the positioning block, the positioning pin 141 is slidably clamped in the third chute 141a, so that the positioning block 143 easily and simply realizes the sliding arrangement with the positioning pin 141, and the first elastic component 142 of the invention is sleeved on the positioning pin 141 and is compressively disposed between the armrest fixing member 11 and the positioning block 143, and is elastically in abutting connection with the shank leaning fixing member 13 by virtue of the compressively first elastic component 142; the positioning block 143 protruding out of the positioning pin 141 realizes direct elastic interference with the shank rest fixing piece 13, and compared with the direct interference with the shank rest fixing piece 13 by the positioning pin 141, the interference area with the shank rest fixing piece 13 is increased, therefore, the elastic interference connection with the shank rest fixing piece 13 is directly realized by the positioning block 143, and the stability and reliability of locking and unlocking of the locking mechanism 14 are further improved due to the increase of the interference area.

5a, 7a, 8a and 10a, more specifically, when the seat is folded to be unfolded manually, and when the armrest is not unfolded, the positioning pin 141 slides along the third chute 141a of the positioning block 143, so that the positioning pin 141 and the positioning block 143 are close to each other (i.e. the length of the positioning pin in the third chute is longest), the positioning pin 141 and the positioning block 143 are close to each other, so that the second elastic element 144 is in a compressed state, and after the armrest is unfolded, the compressed second elastic element 144 pushes the positioning pin 141 into the third chute 141a to gradually break the sliding of the positioning pin 141 from the positioning block 143, and gradually inserts the positioning pin 141 into the positioning hole 111 from the positioning hole 111 when the armrest is not unfolded; specifically, the first elastic element 142 and the second elastic element 144 are both coil springs.

Preferably, the contact portion between the positioning block 143 and the shank rest fixing member 13 is in an arc structure.

As further shown in fig. 8 and 10a, the positioning block 143 of the present invention further has a limiting portion 145 protruding outwards, and when the positioning pin 141 is inserted into the handrail fixing member 11 for locking, the limiting portion 145 abuts against the groove wall 123 of the second chute 122; by the interference of the limiting part 145 and the groove wall 123, the locking stroke of the positioning pin 141 inserted into the locking hole 111 is effectively limited, so that the positioning pin 141 directly impacts the handrail fixing piece 11 when the handrail fixing piece 11 is locked, the handrail fixing piece 11 is not damaged by the impact of the positioning pin 141, and the quality and the service life of a product are ensured.

Preferably, the positioning block 143 of the present invention has a 7-shaped structure.

As shown in fig. 1-10 a, rotation of the shank rest fixture 13 of the present invention will cause the locking mechanism 14 to lock or unlock rotation of the armrest fixture 11 relative to the back rest fixture 12; when the unfolded infant carrier 100 is folded, the calf rest fixing piece 13 rotates relative to the backrest fixing piece 12 by folding the calf rest 103, the rotation of the calf rest fixing piece 13 can enable the locking mechanism 14 to unlock the armrest fixing piece 11, namely the locking mechanism 14 releases the rotation of the armrest fixing piece 11 relative to the backrest fixing piece 12, so that the armrest fixing piece 11 automatically rotates relative to the backrest fixing piece 12 under the action of gravity, and the armrest 101 connected to the armrest fixing piece 11 is folded synchronously along with the calf rest 103; when the folded infant carrier 100 is unfolded, the calf rest 13 is rotated relative to the back rest 12 by unfolding the calf rest 103, and when the calf rest 13 is rotated to an unfolded state, the locking mechanism 14 locks the rotation of the armrest fixing member 11, that is, the locking mechanism 14 locks the rotation of the armrest fixing member 11 relative to the back rest 12, so that the armrest fixing member 11 and the armrest 101 connected thereto are fixed in an unfolded state, thereby protecting an infant on the seat 104 of the infant carrier 100; therefore, the armrest 101 and the shank rest 103 are synchronously folded, so that the armrest and the shank rest are convenient to fold by one operation, the volume of the armrest is smaller after folding, the armrest is convenient to carry and transport, and the armrest has high practicability.

In addition, the specific structure of the frame and the manner of unfolding and folding of the infant carrier according to the present invention are well known to those skilled in the art, and will not be described in detail herein.

Referring to fig. 1 to 10a, the unfolding and folding method of the infant carrier of the present invention includes: the lower leg rest 103 is driven to rotate and unfold relative to the backrest 102, so that the lower leg rest 103 drives the locking mechanism 14 to lock the rotation of the armrest 101 relative to the backrest 102, and the armrest 101 is fixed in an unfolded state; or, the lower leg rest 103 is driven to rotate and fold relative to the backrest 102, so that the lower leg rest 103 drives the locking mechanism 14 to release the rotation of the armrest 101 relative to the backrest 102, and the armrest 101 is synchronously folded along with the lower leg rest 103. Wherein the armrest 101 is pivoted to the backrest 102, the calf rest 103 is pivoted to the backrest 102, and the locking mechanism 14 is disposed between the armrest 101 and the calf rest 103. Specifically, a armrest fixing member 11 is connected to the armrest 101, a backrest fixing member 12 is connected to the backrest 102, a shank fixing member 13 is connected to the shank rest 103, the armrest fixing member 11 is pivotally connected to the backrest fixing member 12, and the shank fixing member 13 is pivotally connected to the backrest fixing member 12. When the armrest fixing member 11 and the shank fixing member 13 are linked by the locking mechanism 14 and the shank fixing member 13 rotates in the unfolding direction (in the direction of arrow G in fig. 8), the shank fixing member 13 drives the locking mechanism 14 to lock the rotation of the armrest fixing member 11 relative to the backrest fixing member 12, so that the armrest fixing member 11 and the armrest 101 connected thereto are fixed in the unfolding state (the state shown in fig. 1-7) to protect the infant on the seat 104; when the shank rest fixing member 13 rotates in the folding direction (the direction of arrow F in fig. 1, the folding direction is opposite to the unfolding direction), the shank rest fixing member 13 drives the locking mechanism 14 to release the rotation of the armrest fixing member 11 relative to the backrest fixing member 12, so that the armrest fixing member 11 can rotate relative to the backrest fixing member 12, and the armrest 101 and the shank rest 103 can be folded for carrying and transporting. The specific locking and unlocking is described as follows:

Referring to fig. 5 to 10a, the locking mechanism 14 includes a positioning pin 141, wherein one end of the positioning pin 141 is elastically and eccentrically abutted against the shank rest fixing member 13, and the other end of the positioning pin 141 is opposite to the armrest fixing member 11, and the positioning pin 141 is inserted into the armrest fixing member 11 to lock or withdrawn from the armrest fixing member 11 to release the lock by changing the distance between the abutting position of the positioning pin 141 and the shank rest fixing member 13 relative to the rotation center of the shank rest fixing member 13. Specifically, the handrail fixing element 11 is provided with the locking hole 111 for inserting the positioning pin 141, and the positioning pin 141 is used for realizing the insertion locking and the withdrawal unlocking of the handrail fixing element 11, so that the structure is simple and reliable, and the operation is fast and convenient. It should be noted that in a preferred embodiment, the positioning pin 141 is connected to the positioning block 143 such that the positioning pin 141 abuts the shank rest 13 through the positioning block 143, thereby allowing the positioning pin 141 to be inserted into the armrest fixing 11 to lock or withdrawn from the armrest fixing 11 to release the lock. More specifically, when the present invention directly collides with the shank rest fixing member 13 through the positioning pin 141, the collision place of the positioning pin 141 and the shank rest fixing member 13 is designed into an arc structure, and by means of the mutually matched arc structure, the operation is smoother when switching between the locking shape (i.e. the unfolded shape) and the releasing shape (i.e. the folded shape). When the positioning pin 141 of the present invention directly abuts against the shank rest fixing member 13 through the connected positioning block 143, the abutting portion of the positioning block 143 and the shank rest fixing member 13 is in an arc-shaped structure.

As shown in fig. 5a, 7a, 8a and 10a, a third sliding groove 141a is formed in the positioning block 143, and the positioning pin 141 is slidably engaged in the third sliding groove 141a, so that the positioning block 143 and the positioning pin 141 are slidably disposed.

As shown in fig. 5a, 7a, 8a and 10a, the shank rest fixture 13 is provided in an eccentric structure, and the positioning pin 141 is abutted against different positions of the shank rest fixture 13, so that the positioning pin 141 is inserted into the handrail fixture 11 to lock or is withdrawn from the handrail fixture 11 to release the lock. Specifically, the shank rest fixture 13 includes a body 131, the body 131 having a blocking rib 132 protruding outward, the blocking rib 132 forming an eccentric structure with the body 131; when the positioning pin 141 abuts against the blocking rib 132, that is, when the abutting position of the positioning pin 141 and the handrail fixing member 11 is located in the area D shown in fig. 5a and 10a, the positioning pin 141 is inserted into the handrail fixing member 11 to be locked; when the positioning pin 141 abuts against the body 131, that is, when the abutting position of the positioning pin 141 and the handrail fixing member 11 is located in the area E shown in fig. 7a and 8a, the positioning pin 141 is withdrawn from the handrail fixing member 11 to release the lock.

As shown in fig. 8 and 10a, a first chute 121 is formed on the back fixing member 12 for sliding the positioning pin 141, so that the positioning pin 141 performs locking or unlocking operation under the guiding action of the first chute 121. The positioning pin 141 is guided by the first sliding groove 121, so that the accuracy of locking or unlocking operation is improved.

As shown in fig. 5a, 7a, 8a and 10a, a first elastic component 142 is compressively disposed between the positioning pin 141 and the back rest fixing member 12, the positioning pin 141 is biased in the unlocking direction by the first elastic component 142, and the positioning pin 141 is in a compressed state no matter in the unlocking state or the locking state, so that the positioning pin 141 is always elastically in abutting connection with the shank rest fixing member 13 by the first elastic component 142, and the locking and unlocking functions of the armrest fixing member 11 are realized by the change of the abutting positions of the first elastic component and the shank rest fixing member. Further, the first elastic component 142 of the present invention is sleeved on the positioning pin 141 and is compressively disposed between the armrest fixing member 11 and the positioning block 143, and is elastically connected with the shank rest fixing member 13 by the compressive first elastic component 142; the positioning block 143 protruding out of the positioning pin 141 realizes direct elastic interference with the shank rest fixing piece 13, and compared with the direct interference with the shank rest fixing piece 13 by the positioning pin 141, the interference area with the shank rest fixing piece 13 is increased, therefore, the elastic interference connection with the shank rest fixing piece 13 is directly realized by the positioning block 143, and the stability and reliability of locking and unlocking of the locking mechanism 14 are further improved due to the increase of the interference area.

The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A method of unfolding and folding an infant carrier, comprising:

the lower leg rest is driven to rotate and unfold relative to the backrest, so that the lower leg rest drives the locking mechanism to lock the armrest to rotate relative to the backrest, and the armrest is fixed in an unfolded state;

or the lower leg rest is driven to rotate and fold relative to the backrest, so that the lower leg rest drives the locking mechanism to release and lock the armrest to rotate relative to the backrest, and the armrest is synchronously folded along with the lower leg rest;

the armrest is pivoted with the backrest, the shank rest is pivoted with the backrest, and the locking mechanism is arranged between the armrest and the shank rest.

2. The method of claim 1, wherein a armrest mount is connected to the armrest, a backrest mount is connected to the backrest, a calf rest mount is connected to the calf rest, the armrest mount is pivotally connected to the backrest mount, and the calf rest mount is pivotally connected to the backrest mount.

3. The method according to claim 2, wherein the locking mechanism comprises a positioning pin, one end of the positioning pin is elastically and eccentrically abutted against the shank fixing member, the other end of the positioning pin is opposite to the armrest fixing member, and the positioning pin is inserted into the armrest fixing member to lock or withdrawn from the armrest fixing member to release the lock by changing a distance between an abutting position of the positioning pin and the shank fixing member relative to a rotation center of the shank fixing member.

4. The method of claim 3, wherein the contact between the positioning pin and the shank rest is configured in an arc shape.

5. The method of claim 3, wherein the positioning pin is connected to a positioning block such that the positioning pin abuts the shank rest fixture via the positioning block.

6. The method of claim 5, wherein a third sliding slot is formed on the positioning block, and the positioning pin is slidably engaged in the third sliding slot, so that the positioning block and the positioning pin are slidably disposed.

7. A method of unfolding and folding an infant carrier according to claim 3, wherein the leg rest is arranged in an eccentric configuration such that insertion of the locating pin into or withdrawal of the locating pin from the armrest is achieved by interference of the locating pin with different positions of the leg rest.

8. The method of claim 7, wherein the calf rest mount comprises a body having outwardly projecting blocking ribs forming the eccentric structure with the body; when the locating pin is abutted against the blocking rib, the locating pin is inserted into the handrail fixing piece to be locked; when the locating pin is abutted against the body, the locating pin withdraws from the armrest fixing piece to release the lock.

9. The method of claim 3, wherein a first sliding slot is formed in the backrest fixing member for sliding the positioning pin, so that the positioning pin performs locking or unlocking under the guiding action of the first sliding slot.

10. The method of claim 3, wherein a first elastic member is compressively disposed between the positioning pin and the back fixing member, and the positioning pin is biased in the unlocking direction by the first elastic member, so that the positioning pin is always elastically in abutting connection with the calf fixing member by the first elastic member.