A child carrier that prevents the first seat from tipping over in an unlocked state

Abstract

The present invention discloses a child carrier that prevents a first seat from tipping over in an unlocked state, comprising a frame, a first seat and a second seat, wherein the frame comprises an upper frame, a front leg tube and a rear leg tube, wherein the front end of the first seat is hinged on the front leg tube, and the rear end is fitted with a second seat tube that extends forward of the second seat, wherein the front leg tube synchronously drives the first seat to move forward and backward along the second seat tube between a front limit position and a rear limit position when the upper frame moves forward and backward, wherein a pipe plug is fixedly fitted on the second seat tube, wherein a positioning particle and a linkage mechanism for controlling the positioning particle to extend outward and insert into the front leg tube or to retract inward and detach from the front leg tube are built into the side surface of the first seat, wherein the pipe plug touches the linkage mechanism, and the linkage mechanism drives the positioning particle to detach from the front leg tube; wherein when the first seat is located in the middle position, the positioning particle is inserted into the front leg tube. The child carrier improves the safety of use.

Description

Technical Field

[0001] The present invention relates to a child carrier, in particular to a child carrier capable of preventing a first seat from tipping over in an unlocked state. Background Art

[0002] The child carrier includes a frame, wheels, a first seat and a second seat. The frame includes an upper frame, a front leg tube, a rear leg tube and a push rod. The front leg tube and the rear leg tube are both hinged to the upper frame, the first seat is hinged to the front leg tube, the second seat is hinged to the rear leg tube, and the push rod is connected to the rear leg tube.

[0003] The upper frame of the child carrier has a telescopic function in the front-to-back direction. The top end of the front leg tube is hinged to the front part of the upper frame. The first seat is hinged to the front leg tube. The two are synchronously linked to form an integrated linkage component. The front leg tube and the first seat move synchronously with the upper frame between the front extreme position and the rear extreme position. The front leg tube and the upper frame, and the front leg tube and the first seat are locked by corresponding locking devices at the front extreme position and the rear extreme position, respectively. The front leg tube and the upper frame, and the front leg tube and the first seat are only hingedly connected and are in an unlocked state at any intermediate position between the front extreme position and the rear extreme position.

[0004] The first seat of the existing child carrier moves forward and backward with the front leg tube. When in the extreme position, the hinges between the first seat, the second seat, the front leg tube and the rear leg tube are locked to keep the child carrier in a stable use state as a whole. When the child carrier needs to be folded, it is only necessary to unlock the hinges between the relevant parts so that each part rotates around its hinge point. However, when the first seat is adjusted between the front and rear extreme positions and is in any unlocked state, since the first seat and the front leg tube are only connected by a hinge and have not been locked, there is a risk that the first seat may accidentally tip over, which poses a safety hazard. Summary of the invention

[0005] An object of the present invention is to provide a child carrier which can prevent a first seat portion from tipping over in an unlocked state, thereby improving the safety of the child carrier.

[0006] The above-mentioned objective of the present invention is achieved through the following technical scheme: a child carrier that prevents a first seat from tipping over in an unlocked state, comprises a frame, a first seat and a second seat, the frame comprising an upper frame, a front leg tube and a rear leg tube, the top end of the front leg tube being hinged on the upper frame, the front end of the first seat being hinged on the front leg tube, and the rear end being sleeved with a second seat tube extending forward of the second seat, the front leg tube synchronously driving the first seat to move forward and backward along the second seat tube between a front end limit position and a rear end limit position as the upper frame moves forward and backward, wherein the position between the front end limit position and the rear end limit position is the middle position of the first seat, characterized in that a pipe plug is fixedly sleeved on the second seat tube, a positioning particle and a linkage mechanism for controlling the positioning particle to extend outward and insert into the front leg tube or to retract inward and separate from the front leg tube are built in the side surface of the first seat, when the first seat is adjusted to the front end limit position or the rear end limit position, the pipe plug touches the linkage mechanism, and the linkage mechanism drives the positioning particle to separate from the front leg tube; when the first seat is located in the middle position, the positioning particle is inserted into the front leg tube.

[0007] The child carrier of the present invention is provided with a pipe plug on the second seat tube, and a positioning particle and a linkage mechanism are provided on the side of the first seat. The pipe plug serves as a trigger of the linkage mechanism, triggering the linkage mechanism to operate. The positioning particle serves as a positioning particle of the first seat, contacts the linkage mechanism, and controls the operation of the positioning particle through the linkage mechanism. When the first seat is located at the extreme position, the linkage mechanism controls the positioning particle to retract inwardly and detach from the front leg tube, without affecting the folding of the child carrier; when the first seat is located at any intermediate position, the linkage mechanism controls the positioning particle to retract and extend outwardly to be inserted into the front leg tube to fix the first seat.

[0008] In the present invention, the linkage mechanism comprises a positioning particle trigger unit, a force transmission support block and a support block trigger unit, the force transmission support block is located in the middle of the side surface of the first seat portion, the support block trigger unit is located at the rear of the side surface of the first seat portion, the support block trigger unit is connected with the rear end of the force transmission support block, the support block trigger unit touches the pipe plug when the first seat portion is adjusted from the middle position from the back to the front to the front end limit position, and pushes the force transmission support block to move forward under the force applied by the pipe plug; the positioning particle trigger unit is located at the front of the side surface of the first seat portion, the positioning particle trigger unit is respectively connected with the force transmission support block and the positioning particle, and the force transmission support block transmits force to the positioning particle trigger unit when it moves forward, and the positioning particle trigger unit then transmits force to the positioning particle, so as to control the positioning particle to retract inwardly and separate from the front leg tube; the positioning particle trigger unit directly touches the pipe plug when the first seat portion is adjusted from the middle position from the front to the back to the rear end limit position, moves forward under the force applied by the pipe plug, transmits force to the positioning particle, and controls the positioning particle to retract inwardly and separate from the front leg tube.

[0009] In the present invention, the positioning particle trigger unit comprises a push block and a sliding block, the front part of the side surface of the first seat portion is provided with a front fixed seat, and the push block, the sliding block and the positioning particle are all installed in the front fixed seat; wherein, the lower end of the front part of the sliding block is a two-step ladder with an inclined surface, and the sliding block is provided with a sliding block spring, the rear end of the sliding block is in contact with the front end of the force transmission support block, and the front end of the sliding block is in contact with the top end of the pushing block, and the force transmission support block moves forward when the first seat portion is adjusted to the front end limit position to push the sliding block to move forward, and when the first seat portion is adjusted to the rear end limit position, the sliding block directly touches the pipe plug, and the sliding block is pushed forward by the pipe plug, and the sliding block is reset by the sliding block spring after the external force is eliminated; the pushing block is an inclined block arranged obliquely upward, and the pushing block is provided with a pushing block spring, and the lower part of the pushing block is provided with a pushing inclined surface with a gradually shrinking cross-section with a larger upper section and a smaller lower section on the inner side, and the bottom end of the pushing block is a tongue; the positioning particle is provided with a telescopic spring, and one end of the telescopic spring is fixedly installed The cam is in a position to move in a right direction and to move the pusher block in a right direction so that the pusher block can move inwards and out of the way of the front leg tube, thereby compressing the telescopic spring. When the first seat is in the middle position, the pipe plug does not contact the trigger unit of the support block or the trigger unit of the positioning particle. At this time, the sliding block moves backward under the action of the slider spring, and the push block moves obliquely upward under the action of the elastic restoring force of the push block spring, driving the pushing inclined surface to move obliquely upward, and the positioning particle moves toward the front leg tube under the action of the elastic restoring force of the telescopic spring, so that the positioning particle extends outwards and is inserted into the front leg tube.

[0010] In the present invention, the push block in the positioning particle trigger unit is plugged into and matched with the positioning particle. When the push block moves downward, the force-bearing inclined surface of the positioning particle is pushed by the pushing inclined surface to apply force to the positioning particle. After the force-bearing inclined surface is subjected to force, the positioning particle is driven to move away from the front leg tube, so that the positioning particle is disengaged from the front leg tube and the telescopic spring is compressed at the same time. When the push block moves downward, the positioning particle is freed from the pushing force of the push block, and moves toward the direction of the front leg tube under the action of the elastic restoring force of the telescopic spring, and extends outward to be inserted into the front leg tube, thereby realizing the positioning of the first seat.

[0011] As a preferred embodiment, a fixed cover is fixedly installed in the middle of the side of the first seat part, the fixed cover is a U-shaped cover, a through slide groove is opened in the middle, the force transmission support block is placed in the slide groove and the front and rear ends are extended from the slide groove, and the force transmission support block moves along the slide groove under the action of external force. The fixed cover plays a supporting and guiding function for the force transmission support block.

[0012] In the present invention, the sliding block and the push block are installed in the front fixed seat, and the specific structure is: the top of the front fixed seat is provided with a linear slide groove, the sliding block is inserted in the linear slide groove, the sliding block spring is built in the sliding block, the rear end of the sliding block spring is fixedly contacted with the sliding block, and the front end is fixedly installed on the front fixed seat; the middle part of the front fixed seat is provided with an oblique slide groove, the push block is inserted in the oblique slide groove, the push block spring is built in the push block, the top end of the push block spring is fixedly contacted with the push block, and the bottom end is fixedly installed on the front fixed seat.

[0013] In the present invention, the bottom of the front fixing seat has a hollow positioning guide frame matched with the cross-sectional shape of the positioning particle near the front leg tube, the positioning guide frame plays a positioning and guiding role in the movement of the positioning particle, and the positioning particle is inserted into the positioning guide frame.

[0014] As a preferred embodiment, the head of the positioning particle is a cylindrical positioning column, and the front leg tube is provided with a circular positioning hole for the positioning column to be inserted.

[0015] As a preferred embodiment, the side surface of the lower part of the push block close to the front leg tube is an obliquely arranged outer inclined surface, and the outer inclined surface is parallel to the center line of the front leg tube.

[0016] In the present invention, the support block trigger unit comprises a steel rope connecting block, a steel rope and a guide roller. The rear end of the steel rope connecting block is provided with a connecting block spring. The steel rope is a rigid rope. The top end of the steel rope is fixedly connected to the steel rope connecting block, and the bottom end is fixedly connected to the rear end of the force transmission support block after winding half a circle around the guide roller. The top and bottom ends of the steel rope are both located behind the guide roller. When the steel rope connecting block is adjusted from the middle position from back to front to the front end limit position and touches the pipe plug at the first seat, it moves backward under the force applied by the pipe plug, and the steel rope is pulled to rotate clockwise with the guide roller as the rotation center, driving the force transmission support block to move forward; when the steel rope connecting block is located in the middle position, it does not touch the pipe plug, and moves forward under the elastic restoring force of the connecting block spring, and the steel rope is pulled to rotate counterclockwise with the guide roller as the rotation center, driving the force transmission support block to move backward.

[0017] The support block trigger unit of the present invention is used for triggering the force transmission support block to move forward when the first seat is pulled from the middle position from the back to the front end limit position, and when the steel rope connecting block touches the pipe plug, it moves backward under the force applied by the pipe plug, and at the same time compresses the connecting block spring, pulling the steel rope to rotate clockwise with the guide roller as the rotation center, thereby driving the force transmission support block to move forward; when the steel rope connecting block does not touch the pipe plug, the steel rope connecting block moves forward under the elastic restoring force of the connecting block spring, and drives the force transmission support block to move backward and return to its position through the steel rope.

[0018] As a preferred embodiment, a rear fixed seat is fixedly installed on the rear part of the side of the first seat portion, the guide roller is installed in the rear fixed seat, the steel rope connecting block is inserted in the rear fixed seat, the steel rope connecting block is located above the guide roller, and the two ends of the connecting block spring are respectively fixedly connected to the steel rope connecting block and the inner wall of the rear fixed seat; the rear end of the force transmission support block connected to the steel rope also extends into the rear fixed seat.

[0019] As a preferred embodiment, the first seat of the present invention is combined with the second seat to form one seat when it is adjusted to the rear end limit position. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 is a three-dimensional diagram of the child carrier of the present invention;

[0022] Figure 2 is a front view of the child carrier of the present invention, at which the first seat portion is located at the front extreme position, and the positioning particles are retracted inwardly and separated from the front leg tube;

[0023] Figure 3 is a front view of the child carrier of the present invention with a partial section, in which the first seat portion is located at the front extreme position, and the positioning particles are retracted inwardly and separated from the front leg tube;

[0024] Figure 4 yes Figure 3 A magnified view of part A;

[0025] Figure 5 yes Figure 3 B-B sectional view;

[0026] Figure 6 is a cross-sectional view of a push block in the child carrier of the present invention;

[0027] Figure 7 is a cross-sectional view of a positioning particle in the child carrier of the present invention;

[0028] Figure 8 It is an assembly diagram of the front fixing seat, the pipe plug, the positioning pellets and the linkage mechanism in the child carrier of the present invention;

[0029] Fig. 9 yes Figure 8 Exploded diagram of

[0030] Fig.10 This is a front view of the child carrier of the present invention, in which the first seat is located in the middle position, and the positioning beads extend outwards to be inserted into the front leg tubes;

[0031] Fig.11This is a partially cutaway front view of the child carrier of the present invention, in which the first seat is located in the middle, and the positioning beads extend outwards to be inserted into the front leg tubes;

[0032] Fig.12 yes Fig.11 Enlarged view of part C;

[0033] Fig.13 yes Fig.11 D-D section view;

[0034] Fig.14 is a front view of the child carrier of the present invention, in which the first seat portion is located at the rear end limit position, and the positioning particles are retracted inwardly and separated from the front leg tubes;

[0035] Fig.15 is a partially cutaway front view of the child carrier of the present invention, in which the first seat is located at the rear end limit position, the positioning beads are retracted inwardly and separated from the front leg tube, and the first seat and the second seat are combined into a single seat;

[0036] Fig.16 yes Fig.15 A magnified view of part E;

[0037] Fig.17 yes Fig.15 F-F section view. DETAILED DESCRIPTION

[0038] like Figures 1 to 17 The child carrier shown in the figure prevents the first seat from tipping over in an unlocked state, comprising a frame, wheels 108, a first seat 101 and a second seat 102, the frame comprising an upper frame 103, a front leg tube 104, a rear leg tube 105 and a push rod 106, the second seat 102 is mounted on the rear leg tube 105, the push rod 106 is connected to the rear leg tube 105, the wheels 108 are respectively mounted on the front leg tube 104 and the rear leg tube 105 through the front wheel frame and the rear wheel frame, the front leg tube 104 is connected to the rear leg tube 105, and the front leg tube 104 is connected to the rear leg tube 105. The top end of the tube 104 is hinged on the upper frame 103, the front end of the first seat 101 is hinged on the front leg tube 104, and the rear end is covered with a second seat tube 107 extending forward of the second seat 102. When the front leg tube 104 moves forward and backward with the upper frame 103, it synchronously drives the first seat 101 to move forward and backward along the second seat tube 107 between the front end limit position and the rear end limit position, wherein the position between the front end limit position and the rear end limit position is the middle position of the first seat.

[0039] A tube plug 6 is fixedly mounted on the second seat tube 107, and a positioning particle 1 and a linkage mechanism for controlling the positioning particle 1 to extend outward to be inserted into the front leg tube 104 or to retract inward to be separated from the front leg tube 104 are built into the side of the first seat 101. When the first seat 101 is adjusted to the front end limit position or the rear end limit position, the tube plug 6 touches the linkage mechanism, and the linkage mechanism drives the positioning particle 1 to be separated from the front leg tube 104, so that the child carrier can be folded and retracted at the two limit positions respectively.

[0040] The front leg tube 104, the rear leg tube 105 and the upper frame 103, as well as the first seat 101 and the front leg tube 104 are all hinged, and are provided with corresponding locking devices to keep the child carrier in a stable state when in use. When the child carrier needs to be folded, the corresponding locking device is unlocked, and the relevant components can be rotated around their hinge points; when the first seat 101 is in the middle position, the positioning particles 1 are inserted into the front leg tube 104 to prevent the first seat 101 from tipping over in the middle position, and to prevent the child in the first seat 101 from tipping over and falling. That is, the carrier of the present invention adds a snap-fit ​​function on the basis of the original telescopic function of the first seat 101 to prevent the first seat 101 from tipping forward in the middle position.

[0041] In this embodiment, the linkage mechanism includes a positioning particle trigger unit, a force transmission support block 5 and a support block trigger unit. The force transmission support block 5 is located in the middle of the side surface of the first seat 101, and the support block trigger unit is located at the rear of the side surface of the first seat 101. The support block trigger unit is connected to the rear end of the force transmission support block 5. When the first seat 101 is adjusted from the middle position from the back to the front end limit position, the support block trigger unit touches the pipe plug 6, and the force transmission support block 5 is pushed forward under the force applied by the pipe plug 6; a fixed cover 4 is fixedly installed in the middle of the side surface of the first seat 101, and the fixed cover 4 is a U-shaped cover with a through slide groove 4a in the middle. The force transmission support block 5 is placed in the slide groove 4a and the front and rear ends are They all extend out from the slide groove 4a, and the force transmission support block 5 moves along the slide groove 4a under the action of external force. The positioning particle trigger unit is located at the front part of the side of the first seat 101, and the positioning particle trigger unit is respectively connected with the force transmission support block 5 and the positioning particle 1. When the force transmission support block 5 moves forward, the force is transmitted to the positioning particle trigger unit, and the positioning particle trigger unit then transmits the force to the positioning particle 1, controlling the positioning particle 1 to retract inward and disengage from the front leg tube 104; the positioning particle trigger unit directly touches the pipe plug 6 when the first seat 101 is adjusted from the middle position from front to back to the rear end limit position, and moves forward under the force applied by the pipe plug 6, transmitting the force to the positioning particle 1, controlling the positioning particle 1 to retract inward and disengage from the front leg tube 104.

[0042] The positioning particle trigger unit includes a push block 2 and a sliding block 3 . The front portion of the side surface of the first seat 101 has a front fixing seat 12 . The push block 2 , the sliding block 3 and the positioning particle 1 are all installed in the front fixing seat 12 .

[0043] The top of the front fixed seat 12 is provided with a linear slide groove extending in the front-to-back direction, and the sliding block 3 is inserted into the linear slide groove, wherein the lower end of the front part of the sliding block 3 is a two-step ladder with an inclined surface, and the sliding block 3 is provided with a sliding block spring 3a, the sliding block spring 3a is built in the sliding block 3, the rear end of the sliding block spring 3a is fixedly contacted with the sliding block 3, and the front end is fixedly installed on the front fixed seat 12; the rear end of the sliding block 3 can be in contact with the front end of the force transmission support block 5 or the rear end of the sliding block 3 is separated from the front end of the force transmission support block 5 by a distance, and the front end of the sliding block 3 is in contact with the top end of the pushing block 2, and the force transmission support block 5 moves forward when the first seat 101 is adjusted to the front end limit position, which can push the sliding block 3 to move forward. When the first seat 101 is adjusted to the rear end limit position, the sliding block 3 directly touches the pipe plug 6, and the sliding block 3 is pushed forward by the pipe plug 6. The sliding block 3 is reset by the sliding block spring 3a after the external force is eliminated.

[0044] The middle part of the front fixed seat 12 has a rear slide groove extending in the up-down direction. In this embodiment, the slide groove is designed to match the arc shape of the front leg tube and is arranged as an oblique slide groove at an angle to the up-down direction. The push block 2 is inserted into the oblique slide groove. The push block 2 is an oblique block arranged obliquely upward. The push block 2 has a push block spring 2a. The push block spring 2a is built in the push block 2. The top end of the push block spring 2a is fixedly contacted with the push block 2, and the bottom end is fixedly mounted on the front fixed seat 12; the lower part of the push block 2 has a gradually increasing cross-section on the inner side, with a larger upper part and a smaller lower part. The bottom end of the push block 2 is a tongue 2c; the positioning particle 1 has a telescopic spring 1a, one end of the telescopic spring 1a is fixedly installed in the front fixed seat 12, and the other end is fixedly connected to the rear end of the positioning particle 1, the telescopic spring 1a coincides with the center line of the positioning particle 1 and is perpendicular to the center line of the front leg tube 104, the positioning particle 1 is provided with a through hole 1c and a force-bearing inclined surface 1b with a gradually expanding cross-section of a small upper part and a large lower part connected to the through hole 1c, and the inclination angle of the force-bearing inclined surface 1b is the same as that of the pushing inclined surface 2b.

[0045] When the sliding block 3 moves forward, the step structure with a height difference in the vertical direction pushes the pushing block 2 to move obliquely downward, and the positioning particle 1 is driven to retract inward and separate from the front leg tube 104 by applying force to the force-bearing inclined surface 1b through the pushing inclined surface 2b, and at the same time compresses the telescopic spring 1a. Figure 5 As shown, the folding function of the child carrier is not affected at this time; when the first seat 101 is in the middle position, the pipe plug 6 does not contact the support block trigger unit or the positioning particle trigger unit. At this time, the sliding block 3 moves backward under the action of the slider spring 3a, and the push block 2 moves obliquely upward under the elastic restoring force of the push block spring 2a, driving the push inclined surface 2b to move obliquely upward, and the positioning particle 1 moves toward the front leg tube 104 under the elastic restoring force of the telescopic spring 1a, so that the positioning particle 1 extends outward and is inserted into the front leg tube 104, as shown in FIG. Fig.13 As shown, at this time, the first seat 101 can be prevented from accidentally tipping forward in the middle position.

[0046] In this embodiment, the bottom of the front fixing seat 12 has a hollow positioning guide frame 12a that is adapted to the cross-sectional shape of the positioning particle 1 near the front leg tube 104. The positioning guide frame 12a plays a positioning and guiding role in the movement of the positioning particle 1, and the positioning particle 1 is inserted into the positioning guide frame 12a.

[0047] As a preferred solution, the head of the positioning particle 1 is a cylindrical positioning column 1d, and the front leg tube 104 is provided with a circular positioning hole for the positioning column 1d to be inserted; the lower part of the push block 2 is an obliquely arranged outer slope 2d on the side close to the front leg tube 104, and the outer slope 2d is parallel to the center line of the front leg tube 104.

[0048] In this embodiment, the support block trigger unit includes a steel rope connecting block 7, a steel rope 9 and a guide roller 8. A rear fixed seat 10 is fixedly installed on the rear part of the side of the first seat 101, and the guide roller 8 is installed in the rear fixed seat 10. The rear fixed seat 10 has a fixed seat cover 11. The steel rope connecting block 7 is inserted in the rear fixed seat 10. The steel rope connecting block 7 is located above the guide roller 8. The rear end of the steel rope connecting block 7 has a connecting block spring 7a, and the two ends of the connecting block spring 7a are respectively fixedly connected to the steel rope connecting block 7 and the inner wall of the rear fixed seat 10; the steel rope 9 is a rigid rope, the top end of the steel rope 9 is fixedly connected to the steel rope connecting block 7, and the bottom end is fixedly connected to the rear end of the force transmission support block 5 after winding half a circle around the guide roller 8. The rear end of the force transmission support block 5 connected to the steel rope 9 also extends into the rear fixed seat 10, and the top and bottom ends of the steel rope 9 are both located behind the guide roller 8.

[0049] When the steel rope connecting block 7 is adjusted from the middle position from back to front to the front end limit position on the first seat 101 and touches the pipe plug 6, it moves backward under the force applied by the pipe plug 6, pulling the steel rope 9 to rotate clockwise with the guide roller 8 as the rotation center, driving the force transmission support block 5 to move forward; when the steel rope connecting block 7 is in the middle position, it does not touch the pipe plug 6, and moves forward under the elastic restoring force of the connecting block spring 7a, pulling the steel rope 9 to rotate counterclockwise with the guide roller 8 as the rotation center, driving the force transmission support block 5 to move backward, and tightening the force transmission support block 5 backward by pulling the steel rope 9.

[0050] In this embodiment, the pipe plug 6 has a groove, and the groove is fitted on the top of the force transmission support block 5. When the first seat 101 is in the middle position, the first seat 101 will drive the force transmission support block 5 to move axially when it moves axially, and generate axial displacement relative to the pipe plug 6. At this time, although the pipe plug 6 is fitted on the top of the force transmission support block 5 through the groove, the tensioning force generated by pulling the steel rope 9 to tighten the force transmission support block 5 backward is greater than the friction between the force transmission support block 5 and the pipe plug 6, so that the force transmission support block 5 will not be affected by the pipe plug 6 when it moves axially relative to the pipe plug 6, and the groove of the pipe plug 6 will play a guiding and positioning role for the axial movement of the force transmission support block 5.

[0051] In the child carrier of the present embodiment, when the first seat 101 is at the front end limit position or the rear end limit position, the positioning beads 1 are separated from the front leg tube 104, and the first seat 101 is only hinged to the front leg tube 104, which does not affect the folding of the child carrier; and when the first seat 101 is at any intermediate position, the positioning beads 1 are inserted into the front leg tube 104, and the first seat 101 and the front leg tube 104 are not only hinged but also inserted with the positioning beads 1, so as to prevent the first seat 101 from tipping forward in an intermediate position that is not adjusted into place.

[0052] The specific adjustment process of the carrier of the present invention is as follows:

[0053] like Figures 2 to 9 As shown, when the first seat 101 is pulled from the middle position from the back to the front end limit position, the pipe plug 6 hits the steel rope connecting block 7, and the steel rope connecting block 7 pulls the steel rope 9 to rotate clockwise with the guide roller 8 as the rotation center, driving the force transmission support block 5 to move forward, and the force transmission support block 5 pushes the sliding block 3 to move forward, so that the slider spring 3a is compressed, and the sliding block 3 moves forward and uses the inclined surface to push the push block 2 downward, and the push block 2 then uses the pushing inclined surface 2b to push the force-bearing inclined surface 1b, driving the positioning particle 1 to retract inward and disengage from the front leg tube 104, and at the same time compressing the telescopic spring 1a, so that the positioning particle 1 is disengaged from the front leg tube 104, as shown in FIG. Figure 5 As shown, the folded state of the frame is not affected.

[0054] like Figures 10 to 13As shown, when the first seat 101 is pulled forward from the back or adjusted from the front to the back, in any intermediate position not adjusted to the limit position, the pipe plug 6 and the steel rope connecting block 7 are not in contact, and the steel rope connecting block 7 moves forward under the elastic restoring force of the connecting block spring 7a, and the steel rope 9 is pulled to rotate counterclockwise with the guide roller 8 as the rotation center, and the steel rope 9 is pulled to pull the force transmission support block 5 to move backward. The force transmission support block 5 is in a backward tensioned state, and the slider spring 3a in the sliding block 3 will also make the sliding block 3 move backward due to free rebound. When the sliding block 3 moves backward, the force transmission support block 5 will also be pushed backward. The sliding block 3 moves backward, causing the push block 2 to slide upward along the inclined surface, and slide to the upper end plane under the elastic restoring force of the push block spring 2a in the push block 2. The upward sliding of the push block 2 eliminates the pushing effect of the push block 2 on the positioning particle 1. At this time, the positioning particle 1 moves toward the front leg tube 104 under the elastic restoring force of the telescopic spring 1a, and the positioning particle 1 pops outward and engages in the front leg tube 104 to fix the first seat 101. Fig.13 As shown, the first seat 101 will not tip over forward because it is not adjusted to the extreme position.

[0055] like Figures 14 to 17 As shown, when the first seat 101 is pulled from the middle position from the front to the rear to the rear end limit position, the first seat 101 contacts the second seat 102. As a preferred embodiment, the first seat 101 is directly inserted into the second seat 102, and the double seats are combined into a single seat. At this time, the sliding block 3 directly touches the pipe plug 6, and the sliding block 3 is pushed forward by the pipe plug 6 to compress the slider spring 3a. The sliding block 3 moves forward and uses the inclined surface to push the push block 2 downward. The push block 2 then uses the pushing inclined surface 2b to push the force inclined surface 1b, driving the positioning particle 1 to retract inward and disengage from the front leg tube 104, and at the same time compressing the telescopic spring 1a, so that the positioning particle 1 is disengaged from the front leg tube 104, as shown in FIG. Fig.17 As shown, the folded state of the frame is not affected.

Claims

1. A child carrier for preventing a first seat from tipping over in an unlocked state, comprising a frame, a first seat (101) and a second seat (102), wherein the frame comprises an upper frame (103), a front leg tube (104) and a rear leg tube (105), wherein the top end of the front leg tube (104) is hinged to the upper frame (103), the front end of the first seat (101) is hinged to the front leg tube (104), and the rear end is sleeved with a second seat tube (107) extending forward from the second seat (102), and when the front leg tube (104) moves with the upper frame (103), it synchronously drives the first seat (101) to move forward and backward along the second seat tube (107) between a front extreme position and a rear extreme position, wherein the position between the front extreme position and the rear extreme position is the middle position of the first seat, and characterized in that: A pipe plug (6) is fixedly mounted on the second seat tube (107); a positioning particle (1) and a linkage mechanism for controlling the positioning particle (1) to extend outward to be inserted into the front leg tube (104) or to retract inward to be separated from the front leg tube (104) are built into the side of the first seat (101); when the first seat (101) is adjusted to the front extreme position or the rear extreme position, the pipe plug (6) touches the linkage mechanism, and the linkage mechanism drives the positioning particle (1) to be separated from the front leg tube (104); when the first seat (101) is located in the middle position, the positioning particle (1) is inserted into the front leg tube (104); the linkage mechanism comprises a positioning particle trigger unit, a force transmission support block (5) and a support block trigger unit; the force transmission support block (5) ) is located in the middle of the side surface of the first seat (101), the support block trigger unit is located in the rear part of the side surface of the first seat (101), the support block trigger unit is connected to the rear end of the force transmission support block (5), and the support block trigger unit touches the pipe plug (6) when the first seat (101) is adjusted from the middle position from the back to the front end limit position, and pushes the force transmission support block (5) to move forward under the force applied by the pipe plug (6); a fixed cover (4) is fixedly installed in the middle of the side surface of the first seat (101), the fixed cover (4) is a U-shaped cover, and a through slide groove (4a) is opened in the middle, the force transmission support block (5) is placed in the slide groove (4a) and the front and rear ends both extend out of the slide groove (4a), and the force transmission support block ( 5) moves along the slide groove (4a) under the action of external force, the positioning particle trigger unit is located at the front part of the side of the first seat (101), the positioning particle trigger unit is respectively connected to the force transmission support block (5) and the positioning particle (1), when the force transmission support block (5) moves forward, it transmits force to the positioning particle trigger unit, and the positioning particle trigger unit then transmits force to the positioning particle (1), and controls the positioning particle (1) to retract inward and separate from the front leg tube (104); when the first seat (101) is adjusted from the middle position from the front to the rear to the rear end limit position, the positioning particle trigger unit directly contacts the pipe plug (6), and moves forward under the force applied by the pipe plug (6), and transmits force to the positioning particle (1), and controls the positioning particle (1) to retract inward and separate from the front leg tube (104). tube (104); the positioning particle trigger unit comprises a push block (2) and a sliding block (3); the front part of the side surface of the first seat (101) is provided with a front fixed seat (12); the push block (2), the sliding block (3) and the positioning particle (1) are all installed in the front fixed seat (12); the top of the front fixed seat (12) is provided with a linear slide groove, the sliding block (3) is inserted in the linear slide groove, wherein the lower end of the front part of the sliding block (3) is a two-step ladder with an inclined surface, and the sliding block (3) has a slider spring (3a), the slider spring (3a) is built in the sliding block (3), the rear end of the slider spring (3a) is fixedly contacted with the sliding block (3), and the front end is fixedly installed on the front fixed seat (12);The rear end of the sliding block (3) contacts the front end of the force transmission support block (5), and the front end of the sliding block (3) contacts the top end of the push block (2). The middle part of the front fixed seat (12) has an oblique groove, and the push block (2) is inserted into the oblique groove. The push block spring (2a) is built into the push block (2), and the top end of the push block spring (2a) is fixedly contacted with the push block (2), and the bottom end is fixedly mounted on the front fixed seat (12); when the first seat (101) is adjusted to the front end limit position, the force transmission support block (5) moves forward to push the sliding block (3) to move forward. When the first seat (101) is adjusted to the front end limit position, the first seat (101) is adjusted to the front end limit position. When the rear end limit position is reached, the sliding block (3) directly contacts the pipe plug (6), and the sliding block (3) is pushed forward by the pipe plug (6). After the external force is eliminated, the sliding block (3) is reset by the slider spring (3a); the push block (2) is an inclined block arranged obliquely upward, the push block (2) has a push block spring (2a), the lower part of the push block (2) has a gradually shrinking push inclined surface (2b) with a larger upper section and a smaller lower section on the inner side, and the bottom end of the push block (2) is a tongue (2c); the positioning particle (1) has a telescopic spring (1a), one end of the telescopic spring (1a) is fixedly installed in the front fixed seat (12), and the other end is connected to the positioning particle (1). The rear end of the particle (1) is fixedly connected, the telescopic spring (1a) coincides with the center line of the positioning particle (1) and is perpendicular to the center line of the front leg tube (104), the positioning particle (1) is provided with a through hole (1c) and a force-bearing inclined surface (1b) connected to the through hole (1c) and having a gradually expanding cross-section with a small upper section and a large lower section, the force-bearing inclined surface (1b) and the pushing inclined surface (2b) having the same inclination angle; when the sliding block (3) moves forward, the stepped structure having a height difference in the vertical direction pushes the pushing block (2) to move obliquely downward, and the pushing inclined surface (2b) exerts force on the force-bearing inclined surface (1b) to drive the positioning particle (1) to retract inward. The front leg tube (104) is separated and the telescopic spring (1a) is compressed at the same time; when the first seat (101) is in the middle position, the pipe plug (6) is not in contact with the support block trigger unit or the positioning particle trigger unit, and the sliding block (3) moves backward under the action of the slider spring (3a), and the push block (2) moves obliquely upward under the action of the elastic restoring force of the push block spring (2a), driving the push inclined surface (2b) to move obliquely upward, and the positioning particle (1) moves toward the front leg tube (104) under the action of the elastic restoring force of the telescopic spring (1a), so that the positioning particle (1) extends outward and is inserted into the front leg tube (104). ; 2. The child carrier for preventing the first seat from tipping over in an unlocked state according to claim 1, characterized in that: The bottom of the front fixing seat (12) is provided with a hollow positioning guide frame (12a) matching the cross-sectional shape of the positioning particle (1) near the front leg tube (104); the positioning guide frame (12a) plays a positioning and guiding role in the movement of the positioning particle (1); the positioning particle (1) is inserted through the positioning guide frame (12a).

3. The child carrier for preventing the first seat from tipping over in an unlocked state according to claim 1, characterized in that: The head of the positioning particle (1) is a cylindrical positioning column (1d), and the front leg tube (104) is provided with a circular positioning hole for inserting the positioning column (1d); the lower part of the push block (2) is provided with an obliquely arranged outer inclined surface (2d) on the side close to the front leg tube (104), and the outer inclined surface (2d) is parallel to the center line of the front leg tube (104).

4. The child carrier for preventing the first seat from tipping over in an unlocked state according to any one of claims 1 to 3, characterized in that: The support block trigger unit comprises a steel rope connection block (7), a steel rope (9) and a guide roller (8). The rear end of the steel rope connection block (7) has a connection block spring (7a). The steel rope (9) is a rigid rope. The top end of the steel rope (9) is fixedly connected to the steel rope connection block (7). The bottom end of the steel rope (9) is fixedly connected to the rear end of the force transmission support block (5) after winding around the guide roller (8) for half a circle. The top and bottom ends of the steel rope (9) are both located behind the guide roller (8). The steel rope connection block (7) is arranged at the first seat (101) from the middle position to the rear. When the front end is adjusted forward to the extreme position where it contacts the pipe plug (6), it moves backward under the force applied by the pipe plug (6), pulling the steel rope (9) to rotate clockwise with the guide roller (8) as the rotation center, thereby driving the force transmission support block (5) to move forward; when the steel rope connecting block (7) is located in the middle position, it does not contact the pipe plug (6), and moves forward under the elastic restoring force of the connecting block spring (7a), pulling the steel rope (9) to rotate counterclockwise with the guide roller (8) as the rotation center, thereby driving the force transmission support block (5) to move backward.

5. The child carrier for preventing the first seat from tipping over in an unlocked state according to claim 4, characterized in that: A rear fixed seat (10) is fixedly mounted on the rear portion of the side surface of the first seat portion (101); the guide roller (8) is mounted in the rear fixed seat (10); the steel rope connecting block (7) is inserted in the rear fixed seat (10); the steel rope connecting block (7) is located above the guide roller (8); the two ends of the connecting block spring (7a) are respectively fixedly connected to the steel rope connecting block (7) and the inner wall of the rear fixed seat (10); and the rear end of the force transmission support block (5) connected to the steel rope (9) also extends into the rear fixed seat (10).

6. The child carrier for preventing the first seat from tipping over in an unlocked state according to any one of claims 1 to 3, characterized in that: When the first seat (101) is adjusted to the rear end limit position, it contacts the second seat (102), and the double seats are combined into a single seat.

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