Ribbon adjusting mechanism and baby carriage

Abstract

The utility model discloses a braid adjusting mechanism and a baby carriage, and relates to the technical field of baby carriages. According to the technical scheme, the device is characterized by comprising a shell, a rotary drum used for bearing a braid, a circumferential locking structure arranged between the shell and the rotary drum and an unlocking piece arranged on the shell; when the circumferential locking structure is in a locking state, the rotary drum cannot rotate relative to the shell, or the rotary drum can rotate in a single direction relative to the shell; the unlocking piece is used for driving the rotary drum to move in the axial direction relative to the shell, so that the circumferential locking structure is switched to the unlocking state, and the rotary drum can rotate in the two directions relative to the shell. The rotary drum plays two roles, the first rotary drum is used for winding the braid, the braid is stretched or contracted through rotation of the rotary drum, the second rotary drum is used for locking the rotary drum, and then locking and unlocking are achieved through axial movement of the rotary drum, so that an independent locking device in the prior art can be omitted, the structure and the assembly process are simplified, and the production efficiency is improved. And the locking reliability and durability are improved.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicles, and more specifically, it relates to a webbing adjustment mechanism and a children's vehicle. Background Technology

[0002] A Chinese patent with authorization announcement number CN110481629B discloses a children's stroller, which includes a frame, a seat, a backrest, and an angle adjustment mechanism for adjusting the angle between the plane of the backrest and the plane of the seat. The angle adjustment mechanism includes a base, a turntable, a locking device, and a backrest rope. The locking device includes a locking plate, teeth on the inner circumference of the turntable, and locking teeth that match the teeth on the locking plate.

[0003] However, the separate locking device makes the angle adjustment mechanism more complex in structure, requires more assembly steps, and its reliability needs to be improved. Utility Model Content

[0004] To address the shortcomings of existing technologies, one of the objectives of this utility model is to provide a webbing adjustment mechanism. The rotating drum in the webbing adjustment mechanism serves two functions: first, it is used to wind the webbing, and the rotation of the drum achieves the extension or contraction of the webbing; second, it is used for locking itself. Specifically, a first limiting tooth is provided on the end face of the rotating drum, and a second limiting tooth is provided on the inner end face of the housing. Locking and unlocking are achieved by the axial movement of the rotating drum. This eliminates the need for a separate locking device in existing technologies, simplifies the structure and assembly process, and improves the reliability and durability of the locking mechanism.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A webbing adjustment mechanism includes a housing, a rotating drum for carrying the webbing, a circumferential locking structure disposed between the housing and the rotating drum, and an unlocking member disposed on the housing;

[0007] When the circumferential locking structure is in the locked state, the rotating drum cannot rotate relative to the housing, or the rotating drum can rotate relative to the housing in one direction.

[0008] The unlocking component is used to drive the rotating drum to move axially relative to the housing, so that the circumferential locking structure switches to the unlocked state, and the rotating drum can rotate bidirectionally relative to the housing.

[0009] Furthermore, the circumferential locking structure includes a first limiting tooth disposed on the end face of the rotating drum, and a second limiting tooth disposed on the inner end face of the housing and cooperating with the first limiting tooth;

[0010] When the first limiting tooth engages with the second limiting tooth, the circumferential locking structure is in a locked state; after the first limiting tooth and the second limiting tooth separate axially, the circumferential locking structure is in an unlocked state.

[0011] Furthermore, a first elastic element acting on the rotating cylinder is provided inside the housing; the first elastic element applies an axial elastic force to the rotating cylinder, causing the rotating cylinder to move to engage the first limiting tooth and the second limiting tooth.

[0012] Furthermore, a second elastic element is also provided inside the housing, which applies a circumferential elastic force to the rotating drum.

[0013] Furthermore, both the first limiting tooth and the second limiting tooth are unidirectional limiting teeth; in the locked state, the rotating drum can rotate unidirectionally relative to the housing under the elastic force of the second elastic element.

[0014] Furthermore, a positioning shaft passing through the rotating cylinder is provided inside the housing, and the second elastic element includes a torsion spring disposed between the positioning shaft and the rotating cylinder.

[0015] Furthermore, the unlocking component includes an unlocking button; when the unlocking button is pressed into the housing, the unlocking button drives the rotating drum to move axially relative to the housing.

[0016] Furthermore, an axial limiting structure is provided between the unlock button and the housing.

[0017] Furthermore, the unlock button passes through the side wall of the housing, and the unlock button is provided with a barb located inside the housing; the barb cooperates with the inner end face of the housing to form an axial limiting structure.

[0018] Another objective of this invention is to provide a stroller that includes the aforementioned webbing adjustment mechanism.

[0019] In summary, this utility model has the following beneficial effects:

[0020] The rotating drum of this invention serves two purposes: first, it is used to wind the webbing, and the rotation of the drum achieves the extension or contraction of the webbing; second, it is used for locking itself, that is, a first limiting tooth is provided on the end face of the rotating drum, and a second limiting tooth is provided on the inner end face of the housing. Locking and unlocking are achieved by the axial movement of the rotating drum. This eliminates the need for a separate locking device in the prior art, simplifies the structure and assembly process, and improves the reliability and durability of the locking. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the webbing adjustment mechanism in Example 1. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the webbing adjustment mechanism in Example 1. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the webbing adjustment mechanism in Example 1. Figure 3 ;

[0024] Figure 4 This is a schematic diagram of the shell structure in Example 1;

[0025] Figure 5 This is a schematic diagram of the webbing adjustment mechanism in Example 1. Figure 4 .

[0026] In the diagram: 1. Housing; 11. Webbing opening; 12. Positioning shaft; 13. Through hole; 14. Second limiting tooth; 2. Rotary drum; 21. First limiting tooth; 3. Unlock button; 31. Barb; 4. First elastic element; 5. Second elastic element. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law. Example 1:

[0029] A webbing adjustment mechanism, as described above Figures 1 to 5 It includes a housing 1, a rotating drum 2 for carrying webbing, a circumferential locking structure disposed between the housing 1 and the rotating drum 2, an unlocking member disposed on the housing 1, a first elastic member 4, and a second elastic member 5; the rotating drum 2 is used to wind the webbing, and the two ends of the webbing pass through two webbing openings 11 on the housing 1 respectively; when the circumferential locking structure is in the locked state, the rotating drum 2 cannot rotate relative to the housing 1, or the rotating drum 2 can rotate relative to the housing 1 in one direction; the unlocking member is used to drive the rotating drum 2 to move axially relative to the housing 1, so that the circumferential locking structure switches to the unlocked state, and the rotating drum 2 can rotate relative to the housing 1 in both directions.

[0030] Reference Figures 1 to 5Specifically, in this embodiment, the inner end face of the housing 1 is provided with a positioning shaft 12 passing through the rotating cylinder 2; the rotating cylinder 2 can rotate around the positioning shaft 12 and can also move axially along the positioning shaft 12; in this embodiment, the circumferential locking structure includes a first limiting tooth 21 disposed on the end face of the rotating cylinder 2, and a second limiting tooth 14 disposed on the inner end face of the housing 1 and cooperating with the first limiting tooth 21; the first limiting tooth 21 and the second limiting tooth 14 are both arranged in a ring; when the first limiting tooth 21 and the second limiting tooth 14 are engaged, the circumferential locking structure is in a locked state; after the first limiting tooth 21 and the second limiting tooth 14 are separated axially, the circumferential locking structure is in an unlocked state.

[0031] Reference Figures 1 to 5 In this embodiment, the unlocking component includes an unlocking button 3. When the unlocking button 3 is pressed into the housing 1, the unlocking button 3 drives the rotating cylinder 2 to move axially relative to the housing 1. After the rotating cylinder 2 moves to the point where the first limiting tooth 21 and the second limiting tooth 14 separate axially, the rotating cylinder 2 is unlocked. In this embodiment, the unlocking button 3 is directly released from the rotating cylinder 2, which simplifies the structure, facilitates assembly, and the press-type control method is also easy to operate. In other optional embodiments, the driving force of the unlocking button 3 can also be indirectly transmitted to the rotating cylinder 2, and the unlocking component can also adopt a pull-type control method, which is not limited here.

[0032] Reference Figures 1 to 5 In this embodiment, a first elastic element 4 is provided inside the housing 1 to act on the rotating cylinder 2; the first elastic element 4 applies an axial elastic force to the rotating cylinder 2, causing the rotating cylinder 2 to tend to move to engage the first limiting tooth 21 and the second limiting tooth 14; the first elastic element 4 is a compression spring, which plays a reset role; when the unlock button 3 is pressed into the housing 1, the first elastic element 4 is compressed, and after the unlock button 3 is released, the rotating cylinder 2 achieves axial movement and reset under the elastic force of the first elastic element 4.

[0033] Reference Figures 1 to 5 In this embodiment, a second elastic element 5 is also provided inside the housing 1, which acts on the rotating drum 2. The second elastic element 5 applies a circumferential elastic force to the rotating drum 2. Specifically, in this embodiment, the second elastic element includes a torsion spring disposed between the positioning shaft 12 and the rotating drum 2. A webbing is wound on the rotating drum 2, and the elastic force of the second elastic element 5 can drive the rotating drum 2 to rotate, promoting the automatic contraction of the webbing. In this embodiment, both the first elastic element 4 and the second elastic element 5 are disposed inside the rotating drum 2, wherein one end of the first elastic element 4 contacts the inner wall of the housing 1, and the other end contacts the end of the second elastic element 5; that is, the elastic force of the first elastic element 4 is transmitted to the rotating drum 2 through the second elastic element 5.

[0034] Reference Figures 1 to 5Specifically, in this embodiment, both the first limiting tooth 21 and the second limiting tooth 14 are unidirectional limiting teeth. In the locked state, the rotating cylinder 2 can rotate unidirectionally relative to the housing 1 under the elastic force of the second elastic element 5. Specifically, in this embodiment, the webbing adjustment mechanism is used to adjust the angle of the backrest on the stroller. In the locked state, the rotating cylinder 2 is also subjected to the combined resistance from the webbing and the first elastic element 4. If no external force intervenes, even if the rotating cylinder 2 is subjected to the circumferential elastic force of the second elastic element 5, it will not rotate relative to the housing 1 and will remain in the locked state. When an external force intervenes, for example, if the backrest is manually rotated upwards, causing the webbing to loosen, the elastic force from the second elastic element 5 on the rotating cylinder 2 is greater than the combined resistance. Therefore, the rotating cylinder 2 can also achieve unidirectional rotation in the locked state, thereby achieving the shrinkage of the webbing.

[0035] Reference Figures 1 to 5 In other words, when the backrest needs to be rotated downwards for adjustment, the rotating cylinder 2 needs to be unlocked by the unlock button 3 to extend the webbing; when the backrest needs to be rotated upwards for adjustment, the unlock button 3 does not need to be operated, and the webbing can be automatically retracted by the one-way limiting tooth and the second elastic element 5, thus optimizing the user experience; in other optional embodiments, the first limiting tooth 21 and the second limiting tooth 14 can also be bidirectional limiting teeth, in which case the rotating cylinder 2 cannot rotate in the locked state, but the unlock button 3 needs to be pressed when the webbing is extended or retracted.

[0036] Reference Figures 1 to 5 In this embodiment, an axial limiting structure is provided between the unlock button 3 and the housing 1. The axial limiting structure also prevents the unlock button 3 from detaching from the housing 1. Specifically, a through hole 13 is provided on the side wall of the housing 1. The unlock button 3 passes through the through hole 13 through the side wall of the housing 1, and a barb 31 located inside the housing 1 is provided on the unlock button 3. The barb 31 cooperates with the inner end face of the housing 1 to form an axial limiting structure. The barb 31 can prevent the unlock button 3 from detaching from the housing 1. When unlocking, the barb 31 contacts the end face of the rotating drum 2, thereby driving the rotating drum 2 to move axially.

[0037] Reference Figures 1 to 5 In this embodiment, the rotating drum 2 serves two purposes. First, it is used to wind the webbing, and the webbing is stretched or contracted by rotating the drum 2. Second, it is used for locking itself. That is, a first limiting tooth 21 is provided on the end face of the rotating drum 2, and a second limiting tooth 14 is provided on the inner end face of the housing 1. Locking and unlocking are achieved by axial movement of the rotating drum 2. This eliminates the need for a separate locking device in the prior art, simplifies the structure and assembly process, and improves the reliability and durability of the locking. Example 2:

[0038] A type of stroller, refer to Figures 1 to 5 It includes the webbing adjustment mechanism in Example 1.

Claims

1. A webbing adjustment mechanism, characterized in that: It includes a housing, a rotating drum for carrying the webbing, a circumferential locking structure disposed between the housing and the rotating drum, and an unlocking component disposed on the housing; When the circumferential locking structure is in the locked state, the rotating drum cannot rotate relative to the housing, or the rotating drum can rotate relative to the housing in one direction. The unlocking component is used to drive the rotating drum to move axially relative to the housing, so that the circumferential locking structure switches to the unlocked state, and the rotating drum can rotate bidirectionally relative to the housing.

2. The webbing adjustment mechanism according to claim 1, characterized in that: The circumferential locking structure includes a first limiting tooth disposed on the end face of the rotating drum, and a second limiting tooth disposed on the inner end face of the housing and cooperating with the first limiting tooth; When the first limiting tooth engages with the second limiting tooth, the circumferential locking structure is in a locked state; after the first limiting tooth and the second limiting tooth separate axially, the circumferential locking structure is in an unlocked state.

3. The webbing adjustment mechanism according to claim 2, characterized in that: The housing is provided with a first elastic element that acts on the rotating cylinder; the first elastic element applies an axial elastic force to the rotating cylinder, causing the rotating cylinder to move toward engaging the first limiting tooth and the second limiting tooth.

4. The webbing adjustment mechanism according to claim 2, characterized in that: The housing is also provided with a second elastic element that acts on the rotating drum, and the second elastic element applies a circumferential elastic force to the rotating drum.

5. The webbing adjustment mechanism according to claim 4, characterized in that: Both the first limiting tooth and the second limiting tooth are unidirectional limiting teeth; in the locked state, the rotating drum can rotate unidirectionally relative to the housing under the elastic force of the second elastic element.

6. The webbing adjustment mechanism according to claim 5, characterized in that: The housing is provided with a positioning shaft passing through the rotating cylinder, and the second elastic element includes a torsion spring disposed between the positioning shaft and the rotating cylinder.

7. The webbing adjustment mechanism according to claim 1, characterized in that: The unlocking component includes an unlocking button; when the unlocking button is pressed into the housing, the unlocking button drives the rotating drum to move axially relative to the housing.

8. The webbing adjustment mechanism according to claim 7, characterized in that: An axial limiting structure is provided between the unlock button and the housing.

9. The webbing adjustment mechanism according to claim 8, characterized in that: The unlock button passes through the side wall of the housing, and the unlock button is provided with a barb located inside the housing; the barb cooperates with the inner end face of the housing to form an axial limiting structure.

10. A children's stroller, characterized in that: Includes the webbing adjustment mechanism according to any one of claims 1-9.

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