Baby carriage telescopic structure

Abstract

The utility model discloses a baby carriage telescopic structure which is characterized in that a gear set is arranged in a movable base, a telescopic wheel set is connected with the movable base, the gear set is meshed with the telescopic wheel set, a fixed base is connected with a front rack and a rear rack, the front rack and the rear rack are meshed with the telescopic wheel set, and a motor is fixed in the fixed base. In the process that the motor drives the lead screw to move the movable base away from the fixed base, the front and rear racks drive the gear set to rotate to drive the telescopic wheel set to stretch; and in the process that the motor drives the lead screw to pull the movable base towards the fixed base, the front and rear racks drive the gear set to rotate to drive the telescopic wheel set to retract. According to the technical scheme, the motor drives the lead screw to be linked with the front rack and the rear rack, and the gear set drives the telescopic wheel set to stretch out and draw back, rapid stretching out and drawing back of the baby carriage structure are achieved, and the problem that an existing baby carriage structure is inconvenient to operate in the relative fixed storage and unfolding process is solved.

Description

Technical Field

[0001] This utility model relates to a stroller structure, and more particularly to a stroller telescopic structure. Background Technology

[0002] Strollers are an essential tool for infants and toddlers' daily travel. Traditional strollers have a relatively fixed structure, and they generally suffer from problems such as cumbersome operation, large size, and difficulty in manual control during storage and unfolding. This inconvenience is a major pain point for users, especially in public transportation or small apartments. Utility Model Content

[0003] This utility model discloses a telescopic structure for a children's stroller. A gear set is installed inside the movable base, and a telescopic wheel set is connected to the movable base and meshes with the telescopic wheel set. A fixed base is connected to front and rear racks, which mesh with the telescopic wheel set. A motor is fixed inside the fixed base. When the motor drives the lead screw to move the movable base away from the fixed base, the front and rear racks rotate through the drive gear set to drive the telescopic wheel set to extend. When the motor drives the lead screw to pull the movable base closer to the fixed base, the front and rear racks rotate through the drive gear set to drive the telescopic wheel set to retract. This utility model achieves rapid telescopic operation of the stroller structure by using a motor-driven lead screw to link the front and rear racks and the gear set to drive the telescopic wheel set, solving the problem of inconvenient operation during the relatively fixed storage and unfolding of existing stroller structures.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A telescopic structure for a children's stroller includes: a fixed base, a movable base, a gear set, a telescopic wheel set, front and rear racks, and a motor. The movable base houses the gear set, and the telescopic wheel set is connected to the movable base and meshes with it. The fixed base is connected to the front and rear racks, which mesh with the telescopic wheel set. The motor is fixed within the fixed base.

[0006] As the motor drives the lead screw to move the movable base away from the fixed base, the front and rear racks drive the telescopic wheel assembly to extend by rotating the telescopic wheel assembly.

[0007] During the process of the motor driving the lead screw to pull the movable base closer to the fixed base, the front and rear racks drive the telescopic wheel set to retract by rotating the telescopic wheel set.

[0008] Further configuration includes a fixed base comprising: base one and base two, base one being connected to base two, a motor being fixed between base one and base two, and front and rear racks being connected to base one.

[0009] Further configuration: The movable base includes: base three and base four. Base three is connected to base four. A gear set is provided between base three and base four. Front and rear racks extend into the space between base three and base four and mesh with the gear set.

[0010] Further configuration includes: a left telescopic wheel assembly and a right telescopic wheel assembly. The left telescopic wheel assembly includes: an upper slider, an upper rack, and a left wheel. The upper slider is connected to the upper rack, and the upper slider is connected to the left wheel. The upper slider and the upper rack are embedded in the base. The right telescopic wheel assembly includes: a lower slider, a lower rack, and a right wheel. The lower slider is connected to the lower rack, and the lower slider is connected to the right wheel. The lower slider and the lower rack are embedded in the base.

[0011] Further, the base three is equipped with a gear set, which includes a lower gear and an upper gear. The front and rear racks mesh with the lower gear and the upper gear simultaneously. The lower rack meshes with the lower gear, and the upper rack meshes with the upper gear.

[0012] In a further configuration, as the motor-driven lead screw moves the movable base away from the fixed base (in the direction of the green arrow in the diagram), the front and rear racks rotate clockwise via the drive lower gear, thereby driving the right telescopic wheel assembly to extend to the right; as the motor-driven lead screw moves the movable base away from the fixed base (in the direction of the green arrow in the diagram), the front and rear racks rotate counterclockwise via the drive upper gear, thereby driving the left telescopic wheel assembly to extend to the left.

[0013] In a further configuration, as the motor-driven lead screw pulls the movable base closer to the fixed base (in the direction of the red arrow in the diagram), the front and rear racks rotate counterclockwise via the drive lower gear, thereby driving the right telescopic wheel assembly to retract to the left; as the motor-driven lead screw pulls the movable base closer to the fixed base (in the direction of the red arrow in the diagram), the front and rear racks rotate clockwise via the drive upper gear, thereby driving the left telescopic wheel assembly to retract to the right.

[0014] Further configuration includes a movable base connected to a lead screw top block, a lead screw top block connected to a lead screw end face, a movable base connected to a slide rod, and a fixed base sleeved with the slide rod.

[0015] This invention achieves rapid extension and retraction of the stroller structure through a technical solution that uses a motor-driven lead screw to link the front and rear racks and gear sets to drive the extension and retraction of the telescopic wheel set. This solves the problem of inconvenient operation during the relatively fixed storage and unfolding process of existing stroller structures. Attached Figure Description

[0016] Figure 1 The three-dimensional representation of the extended state of this utility model Figure 1 ;

[0017] Figure 2 The three-dimensional representation of the extended state of this utility model Figure 2 ;

[0018] Figure 3 This is a partial exploded view of the extended state of this utility model;

[0019] Figure 4 The three-dimensional form of this utility model in its retracted state Figure 1 ;

[0020] Figure 5 The three-dimensional form of this utility model in its retracted state Figure 2 ;

[0021] Figure 6 This is a partial cross-sectional view of the present invention;

[0022] In the diagram: 1. Base 1; 2. Motor; 3. Lead screw; 4. Front and rear racks; 5. Base 2

[0023] 6. Base 3; 7. Slide rod; 8. Lower gear; 9. Lower slider; 10. Lower rack; 11. Right wheel.

[0024] Base 4 12, upper gear 13, upper slider 14, upper rack 15, left wheel 16, lead screw top block 17. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0029] like Figures 1-6 As shown, the telescopic structure of the children's vehicle disclosed in this utility model includes a fixed base 1, a second base 5, a movable base (composed of a third base 6 and a fourth base 12), front and rear racks 4, a gear set (composed of a lower gear 8 and an upper gear 13), a telescopic wheel set (a left telescopic wheel set and a right telescopic wheel set), a motor 2, a lead screw 3, and a slide rod 7, etc.

[0030] Preferably, the fixed base is formed by bolting base 1 and base 2 5 to form an integral frame, creating an installation space for motor 2 between them. Motor 2 is fixed between base 1 and base 2 5 by a bracket, aligning its output shaft with the end face of lead screw 3. One side of base 1 is provided with a socket hole for slide rod 7 to guide the linear movement of the movable base; the lower end of front and rear racks 4 is fixed to the other side of base 1, and racks 4 extend from base 1 and extend along the movement direction into the space between base 3 6 and base 4 12, meshing with the gear set.

[0031] Preferably, the movable base consists of base three (6) and base four (12) connected by a connector, and a gear set is installed in the cavity between them. The gear set includes a lower gear 8 disposed in base three (6) and an upper gear 13 disposed in base four (12). The two gears are coaxially arranged and, after the spacing is adjusted, mesh with the front and rear racks 4 simultaneously. A sliding groove is provided on the outer side of base three (6) to mate with the upper rack 15, and a sliding groove is provided on the outer side of base four (12) to mate with the lower rack 10, providing channels for the insertion and guidance of the telescopic wheel set. The movable base is also connected to the end face of the lead screw 3 via a lead screw top block 17 and guided to the fixed base 1 via a sliding rod 7.

[0032] Preferably, the telescopic wheel assembly is divided into left and right groups: The left telescopic wheel group includes an upper slider 14, an upper rack 15, and a left wheel 16. The upper slider 14 and the upper rack 15 are integrally formed or connected by bolts, and can slide horizontally within the side groove of the base 12; the lower end of the upper slider 14 is connected to the left wheel 16, which supports and rolls the stroller frame. The right telescopic wheel group includes a lower slider 9, a lower rack 10, and a right wheel 11. The lower slider 9 is integrally formed or connected to the lower rack 10, and can slide within the side groove of the base 6; the lower end of the lower slider 9 is connected to the right wheel 11.

[0033] Telescopic drive and working process:

[0034] Extension Action: Motor 2 drives lead screw 3 to rotate, causing lead screw top block 17 to push the movable base along slide rod 7 in a straight line away from the fixed base (in the direction of the green arrow in the diagram). At this time, the front and rear racks 4 remain stationary relative to the fixed base. Racks 4 mesh with lower gear 8 and upper gear 13, driving lower gear 8 to rotate clockwise and upper gear 13 to rotate counterclockwise, respectively. The rotation of lower gear 8 drives lower rack 10 to move to the right, causing the right telescopic wheel assembly to extend to the right; the rotation of upper gear 13 drives upper rack 15 to move to the left, causing the left telescopic wheel assembly to extend to the left. After a certain stroke, the left and right wheel assemblies extend symmetrically to the set width, completing the unfolded state.

[0035] Retraction action: When motor 2 reverses, lead screw 3 guides the movable base along slide rod 7 towards the direction of pulling closer to the fixed base (in the direction of the red arrow in the figure). The front and rear racks 4 drive the lower gear 8 to rotate counterclockwise and the upper gear 13 to rotate clockwise through the meshing gear set. This causes the lower rack 10 to move to the left and the upper rack 15 to move to the right. The right telescopic wheel set and the left telescopic wheel set retract inward synchronously until they are stored in the most compact state.

[0036] This invention achieves rapid, synchronous, and smooth extension and retraction of the stroller's width through the linkage drive of motor 2—lead screw 3—slide rod 7 linear guide—front and rear racks 4—gear set—telescopic wheel set. Compared with traditional manual extension or single-side drive methods, it is easier to operate, more compact in structure, and more convenient to store, especially in public transportation or confined spaces, greatly improving the user experience.

[0037] This invention achieves rapid extension and retraction of the stroller structure through a technical solution that uses a motor 2 to drive a lead screw 3 to link the front and rear racks 4 and a gear set to drive the extension and retraction of the telescopic wheel set. This solves the problem of inconvenient operation during the relatively fixed storage and unfolding process of existing stroller structures.

[0038] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A stroller extension structure, comprising: Comprising: Fixed base, movable base, gear set, telescopic wheel set, front and rear rack (4), motor (2), movable base is equipped with gear set, telescopic wheel set is connected with movable base, gear set and telescopic wheel set are engaged, fixed base is connected with front and rear rack (4), front and rear rack (4) and telescopic wheel set are engaged, motor (2) is fixed in fixed base, The process of motor (2) driving screw rod (3) to move movable base away from fixed base, front and rear rack (4) drives telescopic wheel set to expand by driving gear set to rotate. The process of motor (2) driving screw rod (3) to move movable base to fixed base, front and rear rack (4) drives telescopic wheel set to retract by driving gear set to rotate.

2. The stroller of claim 1, wherein: Fixed base comprises: base one (1), base two (5), base one (1) is connected with base two (5), motor (2) is fixed between base one (1) and base two (5), front and rear rack (4) is connected with base one (1).

3. A stroller according to claim 2, wherein: Movable base comprises: Base three (6), base four (12), base three (6) is connected with base four (12), gear set is arranged between base three (6) and base four (12), front and rear rack (4) is engaged with gear set by extending into base three (6) and base four (12).

4. A stroller according to claim 3, wherein: Telescopic wheel set comprises: left telescopic wheel set, right telescopic wheel set, left telescopic wheel set comprises: upper sliding block (14), upper rack (15), left wheel (16), upper sliding block (14) is connected with upper rack (15), upper sliding block (14) is connected with left wheel (16), upper sliding block (14) and upper rack (15) are embedded in base four (12); Right telescopic wheel set comprises: lower sliding block (9), lower rack (10), right wheel (11), lower sliding block (9) is connected with lower rack (10), lower sliding block (9) is connected with right wheel (11), lower sliding block (9) and lower rack (10) are embedded in base three (6).

5. A stroller according to claim 4, wherein: Gear set is arranged in base three (6), gear set comprises: lower gear (8), upper gear (13), front and rear rack (4) is engaged with lower gear (8) and upper gear (13) at the same time, lower rack (10) is engaged with lower gear (8), upper rack (15) is engaged with upper gear (13).

6. A stroller according to claim 5, wherein: The process of motor (2) driving screw rod (3) to move movable base away from fixed base, front and rear rack (4) drives right telescopic wheel set to expand to the right by driving lower gear (8) to rotate clockwise; The process of motor (2) driving screw rod (3) to move movable base away from fixed base, front and rear rack (4) drives left telescopic wheel set to expand to the left by driving upper gear (13) to rotate counterclockwise.

7. The stroller of claim 5, wherein: The process of motor (2) driving screw rod (3) to move movable base to fixed base, front and rear rack (4) drives right telescopic wheel set to retract to the left by driving lower gear (8) to rotate counterclockwise; The process of motor (2) driving screw rod (3) to move movable base to fixed base, front and rear rack (4) drives left telescopic wheel set to retract to the right by driving upper gear (13) to rotate clockwise.

8. The stroller of claim 3, wherein: The movable base is connected with the screw rod top block (17), the screw rod top block (17) is connected with the end face of the screw rod (3), the movable base is connected with the sliding rod (7), and the fixed base is sleeved with the sliding rod (7).

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