CN209600584U - Locking mechanism and folding stroller having the same - Google Patents

Abstract

The utility model discloses a locking mechanism and a folding children's stroller with the locking mechanism. The elastic pin on the rod is connected with the guide groove so as to be rotatable and movable along the guide groove; when the locking mechanism is in the locked state, the lock pin is located on one side of the elastic pin, and one side of the elastic pin has a pair of formations for the lock pin. Blocked blocking area; when the locking mechanism transitions from the locked state to the unlocked state, the movement of the second rod moves the locking pin along the guide groove; when the locking mechanism is in the unlocked state, the locking pin exceeds the length of the elastic pin snap the pin out of the blocking area. The utility model can unlock the locking mechanism when the frame is folded, lock the locking mechanism when the frame is opened, and can quickly complete the folding.

Description

Locking mechanism and folding stroller having the same

technical field

The utility model relates to a locking mechanism and a folding children's stroller with the locking mechanism.

Background technique

Folding strollers are widely used as a means of transportation for children. It is easy to fold and the volume is small after folding, which is the demand of consumers for the use of folding strollers. A foldable stroller in the prior art generally includes a foldable frame, a wheel mounted under the frame, and a locking device capable of locking the frame in an open state. In the existing front and rear two-seat folding stroller, the locking device includes the locking of the whole frame (which is generally realized by locking the push rod, and the unlocking operation member is also generally arranged on the push rod) and the locking of the front seat mechanism, Therefore, two-step folding is generally required when folding, namely the folding of the front seat and the folding of the frame. There is no front seat locking mechanism that can automatically unlock during the folding of the frame and automatically lock during the opening of the frame.

Utility model content

In order to solve the above problems, the purpose of the present invention is to provide a locking mechanism and a folding stroller with the locking mechanism.

In order to achieve the above purpose, the technical solution adopted by the present utility model is: a locking mechanism, comprising a guide groove opened on the first rod, a lock pin arranged on the second rod, and a lock pin movably connected to the third rod The elastic pin on the part, the lock pin is rotatable and can move along the guide groove and is connected with the guide groove;

When the locking mechanism is in the locked state, the lock pin is located on one side of the elastic pin, and one side of the elastic pin has a blocking area that blocks the lock pin, and the relative rotational relationship between the first rod and the second rod is restricted; when During the transition of the locking mechanism from the locked state to the unlocked state, the movement of the second rod makes the lock pin move along the guide groove; when the locking mechanism is in the unlocked state, the lock pin exceeds the elastic pin in the length direction of the elastic pin and leaves the blocking area , the relative rotational relationship between the first rod and the second rod is released.

Further, when the locking mechanism is in the unlocked state, the relative rotation between the first rod and the second rod causes the lock pin to move to the other side of the elastic pin.

Further, the third rod is provided with an elastic member applied to the elastic pin, and the other side of the elastic pin has an inclined surface. When the locking mechanism transitions from the unlocked state to the locked state, the locking pin is in sliding contact with the inclined surface and is in sliding contact with the inclined surface. The locking mechanism locks by sliding along the ramp over the pin to one side of the pin and into the blocking area.

Furthermore, when the locking pin is in sliding contact with the inclined surface, the direction in which the locking pin exerts the force on the elastic pin is opposite to the direction in which the elastic member exerts the force on the elastic pin.

Further, the first rod is rotatably connected with the third rod, the first rod is also rotatably connected with a fourth rod, the fourth rod and the third rod are respectively rotatably connected with a connecting rod, and the first rod is also rotatably connected with a fourth rod. A rod, a third rod, a fourth rod, and a connecting rod form a four-bar linkage that can be opened and folded. When the locking mechanism is in the locked state, the four-bar linkage is locked in the open state, and when the locking mechanism is in the unlocked state state, the four-bar linkage is unlocked.

Further, when the locking mechanism transitions from the locked state to the unlocked state, the moving direction of the locking pin is the same as the length direction of the elastic pin.

Further, the lock pin is arranged on the upper part of the second link, the guide groove is arranged on the lower part of the first rod, the connection between the first rod and the third rod is located above the guide groove, the length direction of the elastic pin and the movement The directions are up and down.

Further, when the locking mechanism transitions from the locked state to the unlocked state, the second lever moves upward to move the lock pin upward along the guide groove; when the locking mechanism is in the unlocked state, the lock pin is located in the length direction of the elastic pin. above the snap pin and out of the blocking area.

The present application also provides another technical solution: a foldable stroller with the above-mentioned locking mechanism, comprising a frame that can be folded and opened, and the frame includes the above-mentioned first rod, second rod and third rod When the frame is in an open state, the locking mechanism is in a locked state, and when the frame transitions from the open state to the folded state, the movement of the second rod moves the lock pin along the guide groove.

Further, the folding stroller also includes a locking device for locking the frame in an open state, the locking device includes a locking mechanism, the third rod is a front bracket with a front wheel connected to the bottom, and the first rod is a lower part that is connected to the front bracket. The backrest rod is rotatably connected, and the second rod is a lower link with a lock pin arranged on the upper part. The frame also includes a seat rod rotatably connected with the backrest rod at the rear, one end is rotatably connected with the seat post, and the other end is rotatably connected with the front bracket The connecting rod connected in rotation, the backrest rod, seat post, connecting rod and front bracket constitute a four-bar linkage mechanism. When the frame is in an open state, the four-bar linkage mechanism is opened, and when the frame is in a folded state, the four-bar linkage mechanism Fold, and the back post, seat post, and connecting rod are brought together on the front bracket.

Furthermore, the folding stroller has a front seat mechanism and a rear seat mechanism, and the front seat mechanism includes a backrest bar, a seat post, and a connecting bar.

Due to the adoption of the above technical solutions, the locking mechanism of the present invention and the folding stroller having the locking mechanism can unlock the locking mechanism when the frame is folded, and lock the locking mechanism when the frame is opened, thereby simplifying the The folding operation steps can quickly complete the folding, and is especially suitable for a folding child stroller with two front and rear seats, so that the front seat mechanism can be unlocked and folded together with the whole vehicle.

Description of drawings

1 is a schematic structural diagram of the locking mechanism in the utility model, wherein the locking mechanism is in a locked state;

Accompanying drawing 2 is the partial structure representation of A in accompanying drawing 1;

3 is a schematic structural diagram of the locking mechanism in the utility model, wherein the locking mechanism is in an unlocked state;

Accompanying drawing 4 is the partial structure representation of B in accompanying drawing 3;

Accompanying drawing 5 is the structural representation of the locking mechanism in the utility model;

Accompanying drawing 6 is C partial structure representation in accompanying drawing 5;

7 is a schematic side view of the structure of the folding stroller in the utility model when it is opened;

8 is a schematic three-dimensional structure diagram of the folding stroller in the utility model when it is in an open state;

9 is a schematic side view of the structure of the folding stroller in the present utility model during the folding process;

10 is a schematic three-dimensional structure diagram of the folding stroller in the present invention during the folding process;

Figure 11 is a schematic side view of the foldable stroller in the utility model when it is further folded;

12 is a schematic three-dimensional structure diagram of the folding stroller of the present invention when it is further folded;

13 is a schematic side view of the foldable stroller of the present invention when it is in a folded state;

Figure 14 is a schematic three-dimensional structure diagram of the foldable baby stroller in the folded state of the present invention.

The symbols in the figure are:

1. Upper push rod; 2. Lower push rod; 3. Lower upright rod; 4. Rear bracket; 6. Rear connecting rod; 6. Sliding sleeve; 7. Backrest rod; 8. Front armrest; 9. Seat post; 11 , lower link; 12, front bracket; 13, front link; 14, front wheel; 15, rear wheel; 16, rear seat panel; 17, rear seat pocket;

101, guide groove; 102, lock pin; 103, elastic pin; 104, elastic piece; 105, inclined plane.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

It can be seen from the schematic structural diagrams of FIG. 1 to FIG. 14 that the locking mechanism in this embodiment includes a guide groove 101 provided on the first rod, a lock pin 102 provided on the second rod, a movable The elastic pin 103 is connected to the third rod, and the locking pin 102 is connected with the guide groove 101 so as to be rotatable and movable along the guide groove 101 .

When the locking mechanism is in the locked state, the locking pin 102 is located on one side of the elastic pin 103, and one side of the elastic pin 103 has a blocking area that blocks the locking pin 102. The relative rotational relationship between the first lever and the second lever is restricted; when the locking mechanism transitions from the locked state to the unlocked state, the movement of the second lever moves the locking pin 102 along the guide groove 101, and the moving direction of the locking pin 102 is the same as the length direction of the elastic pin 103; when the locking mechanism When in the unlocked state, the locking pin 102 exceeds the elastic pin 103 in the length direction of the elastic pin 103 and leaves the blocking area, and the relative rotational relationship between the first rod and the second rod is released.

When the locking mechanism is in the unlocked state, the relative rotation between the first rod and the second rod makes the lock pin 102 move to the other side of the elastic pin 103, and then the first rod and the second rod can continue to be relative to each other. Turn to the target state, which depends on the actual application.

In this embodiment, during the transition of the locking mechanism from the unlocked state to the locked state, the relative rotation between the first rod and the second rod is reset, and the lock pin 102 is first moved to the other side of the elastic pin 103 . Preferably, an elastic member 104 for exerting force on the elastic pin 103 is provided on the third rod member, and the elastic member 104 in this embodiment is a compression spring. The other side of the elastic pin 103 has an inclined surface 105 that can slide in contact with the locking pin 102. Specifically, when the locking pin 102 is in sliding contact with the inclined surface 105, the direction in which the locking pin 102 exerts a force on the elastic pin 103 is opposite to that of the elastic member 104. The spring pin 103 exerts the force in the opposite direction. After the lock pin 102 moves to the other side of the elastic pin 103, the relative rotation between the first rod and the second rod continues to reset, the lock pin 102 is in sliding contact with the inclined surface 105 and slides along the inclined surface 105 to pass the elastic pin 103 to One side of the spring pin 103 and enter the blocking area, so that the locking mechanism completes the locking.

In this embodiment, the lock pin 102 is arranged on the upper part of the second link, the guide groove 101 is arranged on the lower part of the first rod, the connection between the first rod and the third rod is located above the guide groove 101, and the elastic pin The longitudinal direction and the moving direction of 103 are both up and down directions. When the locking mechanism transitions from the locked state to the unlocked state, the upward movement of the second lever causes the locking pin 102 to move upward along the guide groove 101; when the locking mechanism is in the unlocked state, the locking pin 102 is in the length direction of the elastic pin 103 Located above the spring pin 103 and out of the blocking area.

In this embodiment, the first rod is rotatably connected with the third rod, the first rod is also rotatably connected with a fourth rod, and the fourth rod and the third rod are respectively rotatably connected with a connecting rod , the first rod, the third rod, the fourth rod, and the connecting rod form a four-bar linkage that can be opened and folded. When the locking mechanism is in the locked state, the four-bar linkage is locked in the open state. When the locking mechanism In the unlocked state, the four-bar linkage is unlocked.

How the locking mechanism works:

When unlocking, driven by other components or manually operated, the second lever moves upwards, so that the lock pin 102 moves upward along the guide groove 101, and when the lock pin 102 moves to the top of the spring pin 103, the lock pin 102 is disengaged. The blocking area on one side of the elastic pin 103 loses the blocking of the elastic pin 103, so that the locking relationship between the first rod and the second rod is released, and the locking mechanism is unlocked. After unlocking, due to the relative rotation between the first rod and the second rod, the four-bar linkage mechanism composed of the first rod, the third rod, the fourth rod and the connecting rod is driven to fold, so that the The first rod, the fourth rod and the connecting rod are close to the third rod. When locking, first open the four-bar linkage mechanism, and at the same time, the relative rotation between the first rod and the second rod is reset, the lock pin 102 first moves to the other side of the elastic pin 103, and is in sliding contact with the inclined surface 105, and then The locking pin 102 pushes the elastic pin 103 to move downward against the force of the elastic member 104, the locking pin 102 slides along the inclined surface 105 and passes over the elastic pin 103 to one side of the elastic pin 103, and enters the blocking area, and the locking mechanism is in the four-bar linkage mechanism. Complete the lock while completing the opening.

This embodiment also provides another technical solution: a foldable stroller with the above-mentioned locking mechanism, including a frame that can be folded and opened, and the frame includes the above-mentioned first rod, second rod and third rod When the frame is in the open state, the locking mechanism is in the locked state. When the frame transitions from the open state to the folded state, the movement of the second rod causes the locking pin 102 to move along the guide groove 101 . That is, the frame unlocks the locking mechanism during the folding process, and locks the locking mechanism during the opening process.

In a more preferred embodiment, the folding stroller further comprises locking means for locking the frame in the open state, the locking means comprising a locking mechanism.

The third rod is the front bracket 12 with the front wheel 14 connected to the bottom, the first rod is the backrest rod 7 whose lower part is rotatably connected to the front bracket 12, and the second rod is the lower link 11 with the locking pin 102 on the upper part. , the frame also includes a seat post 10 rotatably connected to the back post 7 at the rear, a connecting rod 9 of which one end is rotatably connected to the seat post 10 and the other end is rotatably connected to the front bracket 12 . The backrest bar 7, the seat post 10, the connecting bar 9 and the front bracket 12 constitute a four-bar linkage mechanism. When the frame is in an open state, the four-bar linkage mechanism is opened, and when the frame is in a folded state, the four-bar linkage mechanism is folded. And the backrest rod 7 , the seat rod 10 and the connecting rod 9 are close to the front bracket 12 .

In a more preferred embodiment, the folding stroller has a front seat mechanism and a rear seat mechanism, and the front seat mechanism includes a backrest bar 7 , a seat bar 10 and a connecting bar 9 .

In this embodiment, a specific frame structure is given, which has a pair of side frames symmetrically arranged on the left and right sides, and each side frame includes, in addition to the above-mentioned backrest bar 7 , seat post 10 , and connecting rod 9. In addition to the front bracket 12 and the lower link 11, it also includes an upper push rod 1, a lower push rod 2, a lower vertical rod 3, a rear bracket 4, a front link 13, a rear link 5, a sliding sleeve 6, and a front armrest 8 .

The upper part of the lower push rod 2 is rotatably connected with the upper push rod 1 . The upper part of the lower vertical rod 3 is rotatably connected with the lower part of the upper push rod 1 . The upper part of the rear bracket 4 is rotatably connected with the lower part of the lower push rod 2, the rear bracket 4 is rotatably connected with the lower pole 3, and the rear wheel 15 is connected to the bottom of the rear bracket 4. Specifically, the lower pole 3 is connected with the rear bracket 4. The connection between the rear link 5 (described in detail below) and the rear bracket 4 and the connection between the lower push rod 2 and the rear bracket 4, and the connection between the lower pole 3 and the rear bracket 4 is located in the lower bracket. Between the connection between the rod 3 and the upper push rod 1 and the connection between the lower vertical rod 3 and the sliding sleeve 6 (described in detail below). The upper part of the front bracket 12 is rotatably connected with the upper part of the rear bracket 4, the front wheel 14 is connected to the bottom of the front bracket 12, the upper part of the above-mentioned rear bracket 4 is bent forward, and the connection between the front bracket 12 and the rear bracket 4 is located at the bottom. The front of the connection between the push rod 2 and the rear bracket 4 . The front portion of the front link 13 is rotatably connected to the front bracket 12 . The front part of the rear link 5 is rotatably connected with the rear part of the front link 13 , and the rear part of the rear link 5 is rotatably connected with the rear bracket 4 . The sliding sleeve 6 is slidably connected to the rear connecting rod 5 along the length direction of the rear connecting rod 5 , and the lower part of the lower vertical rod 3 is rotatably connected with the sliding sleeve 6 . Between the connection point of the front link 13 and the connection point of the rear link 5 and the rear bracket 4 . The rear part of the front armrest 8 is rotatably connected with the front part of the backrest bar 7 and the front bracket 12 respectively. In this embodiment, the backrest bar 7, the front armrest 8 and the front bracket 12 are connected by the same rotating shaft. The lower part of the lower link 11 is connected with the front link 13 in rotation. The connection of the rod 13 is between the connection between the rear link 5 and the front link 13 and the connection between the front link 13 and the front bracket 12 . The connection between the seat post 10 and the back post 7 is located below the connection between the back post 7 and the front bracket 12 . The connection between the backrest bar 7 and the front bracket 12 is located between the connection between the rear bracket 4 and the front bracket 12 and the connection between the connection bar 9 and the front bracket 12. The connection between the connection bar 9 and the front bracket 12 is located between the backrest bar 7 and the front bracket 12. The connection between the front bracket 12 and the connection between the front link 13 and the front bracket 12 .

In this frame structure, except that the backrest bar 7, the seat post 10, the connecting rod 9, and the front bracket 12 constitute a four-bar linkage mechanism, the above-mentioned upper push rod 1, lower push rod 2, lower vertical rod 3, and rear bracket 4 It constitutes a four-link mechanism. The lower vertical rod 3, the rear bracket 4, the rear link 5, and the sliding sleeve 6 constitute a crank-slider mechanism. The rear bracket 4, the rear link 5, the front link 13, and the front bracket 12 constitute a four-link mechanism. Mechanism, the front link 13, the front bracket 12, the lower link 11, and the backrest bar 7 constitute a four-bar linkage mechanism.

A rear seat panel 16 is connected to the rear bracket 4 . More preferably, a rear seat pocket 17 is provided behind the upper push rod 1 and the lower push rod 2 , and the rear seat pocket 17 is located at the rear and upper part of the rear seat panel 16 . Specifically, the rear seat panel 16 is connected to the upper portion of the rear bracket 4 and is provided between the two side frames. The rear seat mechanism includes the above-described rear seat panel 16 and rear seat pocket 17 .

How frame folding works:

When the cart is folded, while turning the upper push rod 1 forward and downward, press down to make the lower push rod 2 rotate backward and downward. The formed four-bar linkage mechanism moves, the push rod 1, the lower push rod 2, and the lower vertical rod 3 move closer to the rear bracket 4, and then drive the lower vertical rod 3, the rear bracket 4, the rear connecting rod 5, and the sliding sleeve 6 to form The crank-slider mechanism acts to make the rear link 5 move closer to the rear bracket 4, and the front part of the rear link 5 rotates upward, thereby driving the rear bracket 4, the rear link 5, the front link 13, and the front bracket 12. The formed four-bar linkage mechanism moves, the front link 13 and the front bracket 12 move toward the rear bracket 4 and the rear link 5, and at the same time, the front link 13 and the front bracket 12 also move closer to each other. In this process, the lower link 11 Move upward to unlock the locking mechanism, and the backrest bar 7 and the lower link 11 can rotate relative to each other. The four-bar linkage mechanism composed of the front link 13, the front bracket 12, the lower link 11, and the backrest bar 7 is driven to move and fold, and the backrest bar 7 (and the front armrest 8) rotate forward and downward and move closer to the front bracket 12, and then The four-bar linkage mechanism composed of the backrest rod 7 , the seat rod 10 , the connecting rod 9 and the front bracket 12 is driven to move and fold, and the seat rod 10 rotates forward and downward and moves closer to the front bracket 12 . until the whole car is folded.

The folding baby stroller of the invention simplifies the folding operation steps and can quickly complete the folding. The folding stroller is especially suitable for the front and rear two-seat stroller. When the frame is folded as a whole, the backrest bar, front armrest, seat post of the front seat and the whole vehicle are folded at the same time. The folding stroller for children can be folded as a whole in one step, with simple structure, ingenious conception and convenient operation.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the technology to understand the content of the present invention and implement accordingly, and cannot limit the protection scope of the present invention with this. All equivalent changes or modifications made according to the spirit of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of locking mechanism, it is characterised in that: including be provided on the first rod piece guide groove (101), be arranged in the second bar Lock pin (102) on part, the bullet pin (103) being movably attached on third rod piece, the lock pin (102) can be rotated and can edges Guide groove (101) is movably connected with guide groove (101)；

When the locking mechanism is in the lock state, the lock pin (102) is located at the side of bullet pin (103), the bullet pin (103) Side have the barrier zones stopped, relative rotation between first rod piece and the second rod piece formed to lock pin (102) Relationship is limited；During the locking mechanism is from lock state to unlocked state transition, the second rod piece movement makes The lock pin (102) is mobile along guide groove (101)；When the locking mechanism is in the unlocked state, the lock pin (102) is in institute It states and is more than bullet pin (103) on the length direction of bullet pin (103) and is detached from the barrier zones, first rod piece and the second rod piece Between relative rotation relationship be released.

2. locking mechanism according to claim 1, it is characterised in that: the locking mechanism in the unlocked state, described Relative rotation between one rod piece and the second rod piece makes the lock pin (102) move to the other sides of bullet pin (103).

3. locking mechanism according to claim 1 or 2, it is characterised in that: be provided on the third rod piece to the bullet The elastic component (104) of (103) applied force is sold, the other side of the bullet pin (103) has inclined-plane (105), when the locking mechanism From unlocked state to during lock state transition, the lock pin (102) and inclined-plane (105) phase sliding contact and along it is described tiltedly The side of bullet pin (103) to bullet pin (103) is slided and is crossed in face (105), and enters the barrier zones.

4. locking mechanism according to claim 3, it is characterised in that: mutually sliding connects the lock pin (102) with inclined-plane (105) When touching, lock pin (102) is to the direction of bullet pin (103) applied force with the elastic component (104) to the direction of bullet pin (103) applied force On the contrary.

5. locking mechanism according to claim 1, it is characterised in that: first rod piece rotates with the third rod piece Connection, first rod piece also rotates with one the 4th rod piece and connect, and the 4th rod piece and the third rod piece are respectively with one Connecting rod rotates connection, and first rod piece, third rod piece, the 4th rod piece, connecting rod constitute four companies that are openable and folding Linkage, when the locking mechanism is in the lock state, the four-bar mechanism is locked in opening state, when the locking When mechanism is in the unlocked state, the four-bar mechanism is unlocked.

6. locking mechanism according to claim 1, it is characterised in that: when the locking mechanism from lock state to unlock shape During state transition, the moving direction of the lock pin (102) is identical as the length direction of bullet pin (103).

7. locking mechanism according to claim 1, it is characterised in that: when the locking mechanism from lock state to unlock shape During state transition, second rod piece, which moves upwards, moves up the lock pin (102) along guide groove (101)；Work as institute State locking mechanism it is in the unlocked state when, the lock pin (102) on the length direction of the bullet pin (103) be located at bullet pin (103) top and be detached from the barrier zones.

8. a kind of folding children's cart with locking mechanism described in claim any one of 1-7, it is characterised in that: including The vehicle frame that can be folded and open, the vehicle frame includes first rod piece, the second rod piece and third rod piece, at the vehicle frame When opening state, the locking mechanism is in the lock state, when the vehicle frame is from opening state to the mistake of folded state transition Cheng Zhong, the second rod piece movement keep the lock pin (102) mobile along guide groove (101).

9. folding children's cart according to claim 8, it is characterised in that: the folding children's cart further includes by institute The locking device that vehicle frame is locked in opening state is stated, the locking device includes the locking mechanism, and the third rod piece is bottom Portion is connected with the fore-stock (12) of front-wheel (14), and first rod piece is lower part and the fore-stock (12) rotates the leaning on of connection It carries on the back bar (7), second rod piece is the lower link (11) that top is provided with the lock pin (102), and the vehicle frame further includes rear portion It rotates connection and the other end and fore-stock with rotate seat bar (10), one end and the seat bar (10) of connection of the back support bar (7) (12) rotate the connecting rod (9) of connection, and the back support bar (7), seat bar (10), connecting rod (9), fore-stock (12) constitute four and connect Linkage, when the vehicle frame in the open mode, the four-bar mechanism is opened, described when the vehicle frame is in folded state Four-bar mechanism folds, and the back support bar (7), seat bar (10), connecting rod (9) are drawn close on fore-stock (12).

10. folding children's cart according to claim 9, it is characterised in that: the folding children's cart has front seats Mechanism and back seat mechanism, the front seats mechanism include the back support bar (7), the seat bar (10), the connecting rod (9).