CN105151104B - One kind can fold perambulator - Google Patents

Abstract

The invention discloses a foldable stroller, which comprises a front frame, a rear frame and a push rod which are connected together through a folding joint. The front frame and the rear frame are respectively provided with a front wheel assembly and a rear In the wheel assembly, the folding joint includes a first joint on the front frame, a base on the rear frame and a second joint on the push rod, and the first joint and the second joint are respectively pivoted on On the base, the first joint is provided with a number of first transmission teeth, the second joint is provided with a number of second transmission teeth matching the first transmission teeth, and the second joint is provided with a mounting groove, and the movable A locking spring and a locking pin are provided, and a locking groove is provided on the first joint. When the first joint and the second joint rotate to an angle, the installation groove and the locking groove are aligned and communicated in line; the push rod A shift block and a first brake line matched with the locking pin are arranged on the top. The invention has simple structure and convenient operation, and can effectively guarantee the safety of infants and young children.

Description

A collapsible stroller

technical field

The invention relates to a baby carriage.

Background technique

Most of the current baby carriages have the function of folding and folding to facilitate carrying and storage. In the existing baby carriages, the front frame, the rear frame and the push rod are usually pivoted on a base, and then equipped with One or several locking mechanisms are used to lock each component. When using it, the push rods of the front frame and the rear frame need to be rotated separately, which is not easy to operate, and also makes the stroller have too many parts, the structure is more complicated, and it is not easy to process. And assembly, also prone to failure, can not guarantee the safety of infants and young children.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a foldable stroller with simple and reliable structure, which is easy to use.

The technical scheme that the present invention adopts for solving its technical problem is:

A foldable baby carriage, comprising a front frame, a rear frame and a push rod connected together by at least one folding joint, the bottom of the front frame and the bottom of the rear frame are respectively provided with at least one front wheel assembly and at least one rear wheel assembly, wherein,

The folding joint includes a first joint at the top of the front frame, a base at the top of the rear frame and a second joint at the bottom of the push rod. The first joint and the second The joints are respectively pivoted on the base through a first pivot shaft and a second pivot shaft in the transverse direction, a number of first transmission teeth are arranged around the first pivot shaft on the first joint, and a number of first transmission teeth are arranged around the second joint on the second joint. The pivot shaft is provided with a number of second transmission teeth matching the first transmission teeth, the first transmission teeth and the second transmission teeth are meshed so that the first joint and the second joint can rotate synchronously, and the second joint is provided with There is a mounting groove, a locking spring and a locking pin are movably arranged in the mounting groove, a locking groove is provided on the first joint, when the first joint and the second joint rotate to an angle, the mounting groove and the locking groove Collinearly aligned and connected, at this time the locking spring can push the locking pin to move to make the front part of the locking pin inserted into the locking groove;

The push rod is provided with at least one shift block corresponding to the locking pin, and each shift block is respectively connected to the locking pin through a first brake wire, and the shift block is used to move the locking pin from the lock The tight groove is pulled back into the mounting groove.

Preferably, a fan-shaped guide groove is provided on the end wall of one of the first joint and the second joint, and a flange matching the guide groove is provided on the other end wall. The flange is slidably inserted in the guide groove to limit the relative movement of the first joint and the second joint along the left and right directions.

Preferably, an arc-shaped limiting groove is provided on the side wall of the first joint around the first pivot shaft, and a limiting pin matching the limiting groove is provided on the base, and the limiting pin Inserted in the limit slot and can slide along the limit slot, the limit pin can abut against the end of the limit slot to limit the relative rotation angle of the first joint and the second joint.

Preferably, the rear wheel assembly includes a rear wheel and a brake plate, the rear wheel is pivotally arranged on the bottom of the rear frame through a third transverse pivot shaft, and the rear wheel surrounds the third pivot shaft A number of brake grooves are provided, the middle part of the brake plate is pivoted on the rear frame through a transverse fourth pivot shaft, the fourth pivot shaft deviates from the third pivot shaft, and one end of the brake plate is fixed with a transverse The brake lever is located in the brake groove and abuts against the inner wall of the brake groove to limit the rotation of the rear wheel around the third pivot axis; the brake lever can rotate around the fourth pivot axis with the brake plate The rotation and break away from the brake groove.

Preferably, the rear frame is provided with a longitudinal chute, in which a positioning spring and a slider are sequentially arranged from top to bottom, and a positioning block matching the slider is provided on the brake plate , as the brake plate rotates around the fourth pivot shaft, the slider can abut against the front wall or the rear wall of the positioning block to fix the brake plate at the unlocking position or the braking position.

Preferably, the number of the rear wheel assemblies is two, and they are respectively arranged at the left and right ends of the rear frame, and the brake plates of the two rear wheel assemblies are connected by a second brake line so that they can rotate synchronously.

Preferably, the front wheel assembly includes a connecting seat, a front wheel frame and a front wheel pivoted on the front wheel frame, and the connecting seat is pivotally mounted on the front wheel through a fifth longitudinal pivot shaft. The bottom of the frame, the front wheel frame is pivoted on the connecting seat through a horizontal sixth pivot shaft, a longitudinal damping spring is arranged between the connecting seat and the front wheel frame, and the upper end and the lower end of the shock absorbing spring are respectively fixed on the On the connecting seat and the front wheel frame, and the shock absorbing spring deviates from the sixth pivot shaft.

Preferably, the connecting seat includes a front wheel base and a cylindrical connecting piece, the connecting piece is fixed on the front frame and its inner cavity matches the fifth pivot shaft, the fifth pivot The axle is fixed on the front wheel base and is inserted in the inner cavity of the connecting piece so as to pivotally connect the front wheel base to the connecting piece.

Preferably, the connecting seat is provided with an arc-shaped limiting groove around the sixth pivot shaft, and the front wheel frame is provided with a limiting protrusion matching the limiting groove, and the limiting protrusion Inserted in the limiting groove, it is used to limit the angle of rotation of the front wheel joint relative to the connecting seat around the second pivot shaft.

Preferably, the outer walls of the front frame, the rear frame and the push rod are all covered with a soft rubber sleeve.

The beneficial effects of the present invention are: due to the engagement transmission of the first transmission teeth and the second transmission teeth in the present invention, the front frame and the push rod can be rotated synchronously, and there is no need to rotate the front frame and the push rod separately when folding or unfolding the stroller. When the front frame and the push rod rotate to a predetermined angle, the locking spring can automatically push the front part of the locking pin into the locking groove, so that the front frame and the push rod are relatively fixed to complete the expansion of the stroller , no additional locking operation is required. When the stroller needs to be folded, just push the shift block to pull the locking pin out of the locking groove, and then turn the front frame or push rod. The structure is simple and reliable, and it is easy to use , not easy to break down, can effectively guarantee the safety of infants and young children.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is an overall structural diagram of the present invention;

Fig. 2 is a schematic diagram of an exploded structure of the present invention;

Fig. 3 is a schematic diagram of the exploded structure of the folding joint in the present invention;

Fig. 4 is a schematic diagram of an exploded structure from another perspective of the folding joint in the present invention;

Fig. 5 is a sectional view of the folding joint in the present invention;

Fig. 6 is a schematic diagram of the exploded structure of the rear wheel assembly in the present invention;

Fig. 7 is a partially enlarged view of part A in Fig. 6;

Fig. 8 is a schematic diagram of an exploded structure of another viewing angle of the rear wheel assembly in the present invention;

Fig. 9 is a partially enlarged view of part B in Fig. 8;

Fig. 10 is a schematic diagram of the exploded structure of the front wheel assembly in the present invention;

Fig. 11 is a partially enlarged view of part C in Fig. 10;

Fig. 12 is a schematic diagram of an exploded structure of another perspective of the front wheel assembly in the present invention;

Figure 13 is a partial enlarged view of part D in Figure 12.

detailed description

1 to 13, a foldable stroller includes a front frame 10, a rear frame 20 and a push rod 30 connected together by two folding joints 40, the bottom of the front frame 10 and the rear The bottom of the vehicle frame 20 is respectively provided with two front wheel assemblies 11 and two rear wheel assemblies 21, wherein the folding joint 40 comprises a first joint 12 located at the top of the front vehicle frame 10, a first joint 12 located at the top of the rear vehicle frame 20, The base 22 and a second joint 31 arranged at the bottom of the push rod 30, the first joint 12 and the second joint 31 are respectively pivoted on the base through a first pivot shaft 41 and a second pivot shaft 42 in the transverse direction. 22, the first joint 12 is provided with a number of first transmission teeth 121 surrounding the first pivot shaft 41, and the second joint 31 is provided with a number of second transmission teeth 121 matching the first transmission tooth 121 around the second pivot shaft 42. The transmission tooth 311, the first transmission tooth 121 and the second transmission tooth 311 are meshed so that the first joint 12 and the second joint 31 can rotate synchronously, and a mounting groove 313 is provided on the second joint 31, and the installation groove 313 is movable. There is a locking spring 44 and a locking pin 43. The first joint 12 is provided with a locking groove 122. When the first joint 12 and the second joint 31 rotate to an angle, the installation groove 313 and the locking groove 122 are collinear Aligned and communicated, now the locking spring 44 can push the locking pin 43 to move to make the front part of the locking pin 43 inserted into the locking groove 122; the push rod 30 is provided with two locking pins 43 respectively The corresponding two shifting blocks 32 are respectively connected to the locking pin 43 through a first brake wire 33 , and the shifting block 32 is used to push the locking pin 43 to exit the locking groove 122 .

Due to the engagement transmission of the first transmission tooth 121 and the second transmission tooth 311 in the present invention, the front frame and the push rod 30 can rotate synchronously, and there is no need to rotate the front frame 10 and the push rod 30 when folding or unfolding the stroller , and when the front frame 10 and the push rod 30 rotate to a predetermined angle, the locking spring 44 can automatically push the front part of the locking pin 43 into the locking groove 122, so that the front frame 10 and the push rod 30 are relatively fixed To complete the expansion of the stroller, no additional locking operation is required. When the stroller needs to be folded, it is only necessary to push the shift block 32 to pull the locking pin 43 out of the locking groove 122, and then turn the front frame 10 or the push rod 30, the structure is simple and reliable, easy to use, not prone to failure, and can effectively ensure the safety of infants and young children.

A fan-shaped flange 312 is provided on the end wall of the second joint 31, and a guide groove 124 matching the flange 312 is provided on the end wall of the first joint 12, and the flange 312 is slidably inserted in the guide groove 124. Inside, when the first joint 12 and the second joint 31 rotate around their pivot shafts, the flange 312 can slide in the guide groove 124 without affecting the rotation of the first joint 12 and the second joint 31. This structure can Restricting the relative movement of the first joint 12 and the second joint 31 along the left-right direction can prevent the first joint 12 and the second joint 31 from loosening and staggering, making the folding joint 40 firmer and more stable. Of course, the guide groove 124 also It can be arranged on the second joint 31 , and the flange 312 is correspondingly arranged on the first joint 12 .

A circular arc-shaped limiting groove 123 is formed on the side wall of the first joint 12 around the first pivot shaft 41, and a limiting pin 221 matching the limiting groove 123 is provided on the base 22. The pin 221 is inserted in the limiting groove 123 and can slide along the limiting groove 123. The limiting pin 221 can abut against the end of the limiting groove 123 to limit the relative rotation angle of the first joint 12 and the second joint 31. , usually designed so that when the stroller is unfolded to the use state, the limit pin 221 abuts against one end of the limit groove 123, and when the stroller rotates to the folded state, the limit pin 221 abuts against the other end of the limit groove 123, It is easy to use, and can prevent excessive rotation of the first joint 12 and the second joint 31 from causing damage to other components such as the base 22, and can also improve the firmness of the stroller when it is in use, ensuring the safety of infants and young children.

In this embodiment, the rear wheel assembly 21 includes a rear wheel 211 and a brake plate 212, the rear wheel 211 is pivotally arranged on the bottom of the rear frame 20 through a third transverse pivot shaft 213, and the rear wheel 211 surrounds the third The pivot shaft 213 is provided with a plurality of brake grooves 216, and the middle part of the brake plate 212 is pivotally arranged on the rear frame 20 through a fourth transverse pivot shaft 214. The fourth pivot shaft 214 deviates from the third pivot shaft 213, One end of the brake plate 212 is fixed with a horizontal brake lever 215, which is located in the brake groove 216 and abuts against the inner wall of the brake groove 216 to limit the rotation of the rear wheel 211 around the third pivot shaft 213; The rod 215 can disengage from the brake groove 216 as the brake plate 212 rotates around the fourth pivot shaft 214 . In the rear wheel assembly 21, the abutment between the brake lever 215 and the inner wall of the brake groove 216 is used to limit the rotation of the rear wheel 211 around the third pivot shaft 213. The method of fixing the rear wheels 211 by force is more simple and reliable, and is less likely to break down. When the baby carriage is parked, it can effectively prevent the baby carriage from sliding by itself, effectively ensuring the safety of infants and young children. Simultaneously, the structure is simple and easy to assemble and operate.

The rear vehicle frame 20 is provided with a longitudinal chute 23, which is provided with a positioning spring 217 and a slider 218 from top to bottom in this chute 23, and a positioning spring 217 matched with the slider 218 is provided on the brake plate 212. Block 219, with the rotation of the brake plate 212 around the fourth pivot shaft 214, the slider 218 can abut against the front wall or the rear wall of the positioning block 219 to fix the brake plate 212 at the unlocking position or the braking position. In the example, the cross-section of the bottom surface of the slider 218 is in the shape of a "V", and the top surface of the positioning block 219 is in an inverted "V" shape, so that when the user steps on the brake pedal 212 hard, the slider 218 can be pushed up to unlock the brake. The plate 212 has a simple structure and is easy to use, and can prevent the brake plate 212 from rotating automatically, thereby preventing the baby carriage from sliding by itself, and improving the safety performance of the baby carriage.

In addition, in this embodiment, the brake plates 212 of the two rear wheel assemblies 21 are connected by a second brake line 24 and can rotate synchronously, so that only one brake plate 212 can be operated to release the two rear wheels 211 at the same time. Brake or brake, easy to use.

The front wheel assembly 11 includes a connecting seat, a front wheel frame 113 and a front wheel 114 pivotally arranged on the front wheel frame 113, and the connecting seat is pivotally arranged on the bottom of the front vehicle frame 10 through a longitudinal fifth pivot shaft 116 The front wheel frame 113 is pivotally arranged on the connecting seat through a sixth horizontal pivot shaft 117, and a longitudinal damping spring 115 is arranged between the connecting seat and the front wheel frame 113, and the upper end and the lower end of the shock absorbing spring 115 are respectively It is fixed on the connecting seat and the front wheel frame 113, and the damping spring 115 deviates from the sixth pivot shaft 117. The connecting seat in the front wheel assembly 11 is pivotally arranged on the front frame 10 through a first longitudinal pivot shaft 41, so that the orientation of the front wheels 114 can be easily adjusted, so that the stroller can be easily turned; on the other hand , the front wheel frame 113 is pivoted on the connecting seat through a second horizontal pivot shaft 42, and cooperates with the shock absorbing spring 115, which can effectively reduce the vibration when the stroller is traveling and improve the comfort of the infant. The above structure can also ensure Both front wheels 114 can be in contact with the ground without a certain front wheel 114 hanging in the air due to problems such as uneven road surface or installation accuracy, so that the force on each front wheel 114 is balanced, thereby preventing the front frame 10 and The front wheel 114 is damaged due to excessive force, which prolongs the service life.

In this embodiment, the connecting base includes a front wheel base 112 and a cylindrical connecting piece 111, the connecting piece 111 is fixed on the front frame 10 and its inner cavity matches the fifth pivot shaft 116, the fifth pivot The connecting shaft 116 is fixed on the front wheel base 112 and inserted into the inner cavity of the connecting piece 111 so as to pivotally connect the front wheel base 112 to the connecting piece 111 . After adopting this structure, the front wheel base 112 does not need to be directly pivoted on the front frame 10, so that the connector 111 can be made of a relatively strong and wear-resistant metal material, and the front frame 10 can be made of a lighter material such as plastic. The material is made, can reduce cost, can also reduce the weight of this stroller at the same time, is easy to carry and handle, and is also firmer and more durable.

An arc-shaped limiting groove 1121 is arranged around the sixth pivot shaft 117 on the connecting seat, and a limiting protrusion 1131 matching the limiting groove 1121 is provided on the front wheel frame 113. The limiting protrusion 1131 Inserted in the limit groove 1121, it is used to limit the angle of rotation of the front wheel joint relative to the connecting seat around the second pivot shaft 42, which can prevent the front wheel frame 113 from excessive rotation angle and cause the shock absorbing spring 115 to fall off, simplifying The structure of the front wheel assembly 11 is improved to ensure the normal use of this baby carriage.

The outer walls of the front frame 10, the rear frame 20 and the push rod 30 are all covered with a soft rubber cover (not shown in the figure), which can prevent the infant from being bumped and ensure the safety of the infant.

The above descriptions are only the preferred implementation modes of the present invention, as long as the technical solutions to achieve the purpose of the present invention by basically the same means fall within the scope of protection of the present invention.

Claims (10)

1. one kind can fold perambulator, it is characterised in that：Including passing through an at least folding/unfolding joint（40）The front truck to link together Frame（10）, a Rear frame（20）With a push rod（30）, front frame（10）Bottom and Rear frame（20）Bottom be respectively equipped with to A few front component（11）An at least wheel assembly（21）, wherein,

Described folding/unfolding joint（40）Including located at front frame（10）One first joint at top（12）, located at Rear frame（20）Top One pedestal in portion（22）With located at push rod（30）One second joint of bottom（31）, described the first joint（12）With the second joint （31）Pass through one first drive-connecting shaft of transverse direction respectively（41）With one second drive-connecting shaft（42）It is hubbed on pedestal（22）On, the first joint （12）It is upper to surround the first drive-connecting shaft（41）It is provided with some first driving cogs（121）, the second joint（31）It is upper to be pivotally connected around second Axle（42）It is provided with and first driving cog（121）Some second driving cogs to match（311）, the first driving cog（121） With the second driving cog（311）It is meshed and makes the first joint（12）With the second joint（31）Can synchronous axial system, the second joint（31） On offer a mounting groove（313）, the mounting groove（313）Inside it is movably set with a locking spring（44）With a locking pin（43）, First joint（12）On offer a locking slot（122）, when the first joint（12）With the second joint（31）When turning to an angle, Mounting groove（313）And locking slot（122）Collinearly align and be connected, now locking spring（44）Locking pin can be promoted（43）It is mobile To making locking pin（43）Front portion plug to locking slot（122）It is interior；

Described push rod（30）It is provided with and described locking pin（43）A corresponding at least shifting block（32）, each shifting block（32）Point Do not pass through a first brake line（33）With locking pin（43）Connection, the shifting block（32）For by locking pin（43）From locking slot （122）It is returned to mounting groove（313）It is interior.

2. one kind according to claim 1 can fold perambulator, it is characterised in that：The first described joint（12）Connect with second Head（31）A fan-shaped guide groove is offered on the end wall of both one（124）, another end wall is provided with and the guide groove（124）Phase One flange of matching（312）, described flange（312）Slip is plugged in guide groove（124）It is interior to limit the first joint（12）With Two joints（31）Relative movement in left-right direction.

3. one kind according to claim 1 can fold perambulator, it is characterised in that：First joint（12）Side wall on ring Around the first drive-connecting shaft（41）Offer the stopper slot of a circular arc（123）, pedestal（22）It is provided with and the stopper slot（123）Phase The spacer pin matched somebody with somebody（221）, the spacer pin（221）It is plugged in stopper slot（123）It is interior and can be along stopper slot（123）Slide, it is described Spacer pin（221）Can be with stopper slot（123）End lean to limit the first joint（12）With the second joint（31）Relatively The angular dimension of rotation.

4. one kind according to claim 1 can fold perambulator, it is characterised in that：Described wheel assembly（21）After one Wheel（211）With a braking vane（212）, described rear wheel（211）Pass through a 3rd horizontal drive-connecting shaft（213）After being hubbed on Vehicle frame（20）Bottom, rear wheel（211）It is upper to surround the 3rd drive-connecting shaft（213）It is provided with some brake grooves（216）, the brake Plate（212）Middle part pass through a 4th horizontal drive-connecting shaft（214）It is hubbed on Rear frame（20）On, the 4th drive-connecting shaft（214） Deviate the 3rd drive-connecting shaft（213）, braking vane（212）One end be fixed with a horizontal brake lever（215）, the brake lever（215） Positioned at described brake groove（216）In and with brake groove（216）Inwall lean to limit rear wheel（211）Around the 3rd pivot joint Axle（213）Rotation；Described brake lever（215）Can be with braking vane（212）Around the 4th drive-connecting shaft（214）Rotation and depart from Described brake groove（216）.

5. one kind according to claim 4 can fold perambulator, it is characterised in that：Described Rear frame（20）It is vertical to be provided with one To chute（23）, the chute（23）A retaining spring is inside sequentially provided with from top to bottom（217）With a sliding block（218）, braking vane （212）It is provided with and the sliding block（218）The a positioning block to match（219）, with braking vane（212）Around the 4th drive-connecting shaft （214）Rotation, described sliding block（218）Can be with locating piece（219）Antetheca or rear wall lean with by braking vane（212）Gu It is scheduled on un-brake position or normal danger.

6. one kind according to claim 4 can fold perambulator, it is characterised in that：The wheel assembly（21）Quantity be two It is individual, and set up separately in Rear frame（20）Left and right ends, two wheel assemblies（21）Braking vane（212）Pass through one second brake Line（24）Connection and can synchronous axial system.

7. one kind according to claim 1 can fold perambulator, it is characterised in that：Described front component（11）Connect including one Joint chair, a front wheel carrier（113）Be hubbed on front wheel carrier（113）On a front vehicle wheel（114）, it is longitudinal that described connecting seat passes through one The 5th drive-connecting shaft（116）It is hubbed on front frame（10）Bottom, front wheel carrier（113）Pass through a 6th horizontal drive-connecting shaft （117）It is hubbed on connecting seat, connecting seat and front wheel carrier（113）Between be provided with one longitudinal direction damping spring（115）, the damping bullet Spring（115）Top and bottom be separately fixed at connecting seat and front wheel carrier（113）On, and described damping spring（115）Deviate 6th drive-connecting shaft（117）.

8. one kind according to claim 7 can fold perambulator, it is characterised in that：Described connecting seat includes a front-wheel seat （112）With the connector of a tubular（111）, the connector（111）It is fixed on front frame（10）Upper and its inner chamber and described the Five drive-connecting shafts（116）Match, the 5th drive-connecting shaft（116）It is fixed on front-wheel seat（112）Go up and be plugged in connector（111）It is interior So as to by front-wheel seat in chamber（112）It is articulated in connector（111）On.

9. one kind according to claim 7 can fold perambulator, it is characterised in that：Around the 6th pivot joint on described connecting seat Axle（117）It is provided with the limited impression of an arc（1121）, front wheel carrier（113）It is provided with and the limited impression（1121）Match Spacing block set（1131）, the spacing block set（1131）It is plugged in limited impression（1121）It is interior, connect relative connect for limiting front-wheel Joint chair is around the second drive-connecting shaft（42）The angular dimension of rotation.

10. one kind according to claim 1 can fold perambulator, it is characterised in that：Described front frame（10）, Rear frame （20）And push rod（30）Outer wall on be all covered with a soft gum cover.