Lifting structure of baby carriage backrest

Abstract

The utility model discloses a baby carriage backrest lifting structure which comprises an adjusting button assembly, a plug pin, a spring, a backrest base assembly and a stretching backrest assembly, the adjusting button assembly is composed of button shells, limiting protrusions and cross-shaped protruding points, and the plug pin is rotationally connected between the button shells. The stretching backrest shell is fixed through mutual cooperation of the limiting protrusion and the height gear limiting clamping groove, when the button shell is pressed, after the limiting protrusion is separated from the current height gear limiting clamping groove, the stretching backrest shell is unlocked, the stretching backrest shell moves up and down in a base sliding groove cavity in the backrest base shell, and in the moving process, the stretching backrest shell is locked. When the limiting protrusion abuts against the other height gear limiting clamping groove, the stretching backrest shell is locked again, the lifting process of the stretching backrest shell is completed at the moment, operation is convenient, and the lifting process is simple; and meanwhile, the overall structure is simple, the lifting stability is high, and the durability of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of baby carriages, in particular to a lifting structure for a backrest of a baby carriage. Background Art

[0002] Strollers are an indispensable item for every family with a baby. They can assist the baby in moving to a certain extent, thereby reducing the burden on parents. They have a very high popularity and demand. However, the existing technology also has obvious defects. The height of the seats of most strollers on the current market cannot be adjusted. Even though the seat height of a few strollers can be adjusted, they often have protruding rods above or below the seat or frame, which not only affects the normal folding and folding of the stroller, but also makes the structure of the stroller complicated, the lifting process is unstable, and affects the durability of the product. Therefore, it is very necessary to design a lifting structure for the backrest of a stroller. Utility Model Content

[0003] The purpose of the utility model is to provide a lifting structure for a baby stroller backrest, so as to solve the problem that the height of most baby stroller seats on the existing market cannot be adjusted. Even though a small number of baby strollers can adjust the seat height, they are often provided with a protruding rod above or below the seat or the frame, which not only affects the normal folding and folding of the baby stroller, but also makes the structure of the baby stroller complicated, the lifting process is unstable, and the durability of the product is affected.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a lifting structure of a baby carriage backrest, comprising an adjusting button assembly, a latch, a spring, a backrest base assembly and a stretching backrest assembly, the adjusting button assembly consisting of a button shell, a limiting protrusion and a cross protrusion, a latch is rotatably connected between the button shells, both ends of the latch are sleeved on the backrest base shell in the backrest base assembly, a spring is sleeved in an annular groove provided inside the backrest base shell, and one end of the spring is tightly pressed on the button shell, a base slide cavity is symmetrically opened in the backrest base shell, and a sliding end in the stretching backrest assembly is slidably connected in the base slide cavity, the stretching backrest assembly consists of a stretching backrest shell, a height gear limiting slot, a height gear limiting slot and a sliding end, the sliding end is symmetrically fixed on the bottom of the stretching backrest shell, and a height gear limiting slot is evenly opened on one side of the stretching backrest shell, the height gear limiting slot is matched with the limiting protrusion, and the limiting protrusion is symmetrically fixed on the button shell.

[0005] As a further technical solution of the present invention, the backrest base assembly consists of a backrest base shell, a base slide cavity and a base limit protrusion. The base limit protrusion is arranged on the backrest base shell, and the base limit protrusion is slidably connected in the height gear limit slide. The height gear limit slide is opened on the stretch backrest shell.

[0006] As a further technical solution of the present invention, a connecting component is fixed to the bottom of the backrest base shell, and a base limiting groove is provided on one side of the backrest base shell.

[0007] As a further technical solution of the present invention, a connecting platform and a partition are respectively injection-molded on the backrest base shell, and hollow grooves are evenly opened on the backrest base shell.

[0008] As a further technical solution of the present invention, a fixing piece is provided on one side of the stretch back shell, and a linear groove is opened on one side of the stretch back shell.

[0009] As a further technical solution of the present invention, a handle is rotatably connected to the fixing member.

[0010] As a further technical solution of the present invention, a backrest base inner cover is fixedly connected to the other side of the backrest base shell, and the stretch backrest shell is slidably connected between the backrest base shell and the backrest base inner cover.

[0011] The utility model provides a lifting structure for a baby carriage backrest, which has the advantages that: the stretchable backrest shell is fixed by the cooperation between the limiting protrusion and the height gear limiting slot; when the button shell is pressed, the limiting protrusion is separated from the current height gear limiting slot, the stretchable backrest shell is unlocked, and the stretchable backrest shell moves up and down in the base slide groove cavity in the backrest base shell; during the movement, when the limiting protrusion is against another height gear limiting slot, the stretchable backrest shell is locked again, and the lifting process of the stretchable backrest shell is completed at this time, which is easy to operate and the lifting process is simple; at the same time, the overall structure is simple, the lifting stability is strong, and the durability of the product is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is an exploded view of the overall structure of the utility model;

[0014] Figure 2 This is a structural diagram of the adjustment button assembly of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the backrest base assembly of the utility model;

[0016] Figure 4This is a schematic structural diagram of the stretch backrest assembly of the utility model.

[0017] In the figure: 1. Adjustment button assembly; 2. Latch; 3. Spring; 4. Backrest base assembly; 5. Stretch backrest assembly; 6. Backrest base inner cover; 7. Connecting component; 8. Connecting platform; 9. Handle; 10. Linear groove; 11. Fixing part; 12. Hollow groove; 13. Partition; 100. Button shell; 101. Limiting protrusion; 102. Cross protrusion; 400. Backrest base shell; 401. Base slide cavity; 402. Base limiting protrusion; 500. Stretch backrest shell; 501. Height gear limiting slot; 502. Height gear limiting slide; 503. Sliding end. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0020] Please see the attached Figure 1 -Attached Figure 4The utility model provides an embodiment: a lifting structure of a baby carriage backrest, including an adjustment button assembly 1, a latch 2, a spring 3, a backrest base assembly 4 and a stretching backrest assembly 5. The adjustment button assembly 1 is composed of a button shell 100, a limiting protrusion 101 and a cross protrusion 102. The button shell 100 is rotatably connected with the latch 2. The two ends of the latch 2 are sleeved on the backrest base shell 400 in the backrest base assembly 4. The spring 3 is sleeved in the annular groove provided inside the backrest base shell 400, and one end of the spring 3 is tightly pressed on the button shell 100. The backrest base shell 400 is symmetrically connected. A base slide groove cavity 401 is opened, and the sliding end 503 in the stretch backrest assembly 5 is slidably connected in the base slide groove cavity 401. The stretch backrest assembly 5 is composed of a stretch backrest shell 500, a height gear limiting card slot 501, a height gear limiting slide groove 502 and a sliding end 503. The sliding end 503 is symmetrically fixed to the bottom of the stretch backrest shell 500. One side of the stretch backrest shell 500 is evenly opened with a height gear limiting card slot 501. The height gear limiting card slot 501 is matched with a limiting protrusion 101, and the limiting protrusion 101 is symmetrically fixed on the button shell 100; backrest The base assembly 4 consists of a backrest base shell 400, a base slide cavity 401 and a base limiting protrusion 402. The base limiting protrusion 402 is arranged on the backrest base shell 400, and the base limiting protrusion 402 is slidably connected to the height gear limiting slide 502, and the height gear limiting slide 502 is provided on the stretch backrest shell 500; a connecting component 7 is fixed to the bottom of the backrest base shell 400; a connecting platform 8 and a partition 13 are respectively injection-molded on the backrest base shell 400, and hollow grooves 12 are evenly opened on the backrest base shell 400; a fixed Part 11, a linear groove 10 is provided on one side of the stretch backrest shell 500, and the linear groove 10 is provided to facilitate heat dissipation; a handle 9 is rotatably connected to the fixing part 11, and the handle 9 is convenient for adjusting the height of the stroller backrest; the other side of the backrest base shell 400 is cooperatively connected to one side of the backrest base inner cover 6, and the stretch backrest shell 500 is slidably connected to the groove formed by the backrest base shell 400 and the backrest base inner cover 6. After the backrest base inner cover 6 is connected to the backrest base shell 400, a limiting structure of the stretch backrest shell 500 is formed, which is conducive to improving the stability of the stretch backrest shell 500 during the sliding process;

[0021] Specifically, when in use, the stretch back shell 500 serves as the adjustable part of the seat structure, and is limited by the backrest base shell 400 and the backrest base inner cover 6. When in use, the sliding end 503 symmetrically arranged at the bottom of the stretch back shell 500 is slidably connected to the base slide cavity 401, and the stretch back shell 500 is fixed by cooperating with the height gear limiting slot 501 through the limiting protrusion 101; when the height needs to be adjusted, the button shell 100 is pressed to rotate the button shell 100 around the latch 2, thereby squeezing the spring 3 and causing the limiting protrusion 101 to engage. 1 is separated from the current height gear limit slot 501, and the stretch back shell 500 is unlocked at this time. Then the sliding end 503 at the bottom of the stretch back shell 500 can be moved up and down in the base slide groove cavity 401. When it moves into place, the button shell 100 is released, and then the button shell 100 rotates in the opposite direction around the latch 2 under the action of the spring 3, so that the limit protrusion 101 is against the other height gear limit slot 501, and the stretch back shell 500 is locked again. At this time, the lifting and lowering of the stretch back shell 500 is completed, thereby realizing the function of backrest height adjustment.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A lifting structure for a baby carriage backrest, comprising an adjustment button assembly (1), a latch (2), a spring (3), a backrest base assembly (4) and a stretch backrest assembly (5), characterized in that: The regulating button assembly (1) is composed of a button shell (100), a limiting protrusion (101) and a cross protrusion (102). A latch (2) is rotatably connected between the button shell (100). Both ends of the latch (2) are sleeved on the backrest base shell (400) in the backrest base assembly (4). A spring (3) is sleeved in the annular groove provided inside the backrest base shell (400), and one end of the spring (3) is tightly pressed on the button shell (100). A base slide cavity (401) is symmetrically opened in the backrest base shell (400), and a sliding end (503) in the stretching backrest assembly (5) is slidably connected in the base slide cavity (401). The stretching backrest assembly (5) is composed of a stretching backrest shell (500), a height gear limiting slot (501), a height gear limiting sliding groove (502) and a sliding end (503). The sliding end (503) is symmetrically fixed to the bottom of the stretching backrest shell (500). One side of the stretching backrest shell (500) is evenly provided with a height gear limiting slot (501). A limiting protrusion (101) is engaged in the height gear limiting slot (501). The limiting protrusion (101) is symmetrically fixed to the button shell (100). The button shell (100) is provided with a cross protrusion (102), and the cross protrusion (102) is sleeved in the spring (3).

2. The lifting structure of a baby stroller backrest according to claim 1, characterized in that: The backrest base assembly (4) is composed of a backrest base shell (400), a base slide groove cavity (401) and a base limiting protrusion (402), wherein the base limiting protrusion (402) is arranged on the backrest base shell (400), and the base limiting protrusion (402) is slidably connected to the height gear limiting slide groove (502), and the height gear limiting slide groove (502) is provided on the stretch backrest shell (500).

3. The lifting structure of a baby carriage backrest according to claim 2, characterized in that: A connecting component (7) is fixed to the bottom of the backrest base shell (400).

4. The lifting structure of a baby carriage backrest according to claim 3, characterized in that: The backrest base shell (400) is respectively injection-molded with a connecting platform (8) and a partition (13), and the backrest base shell (400) is evenly provided with hollow grooves (12).

5. The lifting structure of a baby stroller backrest according to claim 2, characterized in that: A fixing piece (11) is provided on one side of the stretch backrest shell (500), and a linear groove (10) is opened on one side of the stretch backrest shell (500).

6. The lifting structure of a baby carriage backrest according to claim 5, characterized in that: The fixing member (11) is rotatably connected to a handle (9).

7. The lifting structure of a baby stroller backrest according to claim 1, characterized in that: The other side of the backrest base shell (400) is fixedly connected to a backrest base inner cover (6), and the stretch backrest shell (500) is slidably connected between the backrest base shell (400) and the backrest base inner cover (6).

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