Locking mechanism and stroller

Abstract

The utility model discloses a locking mechanism and a stroller. The locking mechanism comprises a first base, a second base and a locking assembly. The second base is rotationally connected to the first base and rotates around a rotating axis relative to the first base, and the rotating axis is parallel to the direction from the first base to the second base. The locking assembly comprises a locking piece, an operating piece and a limiting support. The locking piece is used for locking or unlocking the first base and the second base. The operating piece is used for limiting the locking piece to lock the first base and the second base. The limiting support comprises a support body and an elastic limiting arm, the support body is connected to the first base, and the elastic limiting arm is used for limiting the operation piece. The first base comprises a stopping part, and the stopping part and the operating piece abut against the two opposite sides of the elastic limiting arm respectively. The elastic limiting arm can be stopped and limited, the elastic limiting arm is effectively prevented from greatly deforming towards the stopping part, locking failure is prevented, and the stability of directional limiting of the wheel is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of wheel directional locking, and in particular to a locking mechanism and a child stroller. Background Art

[0002] The stroller includes a locking mechanism, which can limit the wheels in a directional manner so that the wheels can only move forward and backward in a single direction. The locking mechanism can also release the limit on the wheels so that the wheels can move forward and backward in multiple directions, thereby meeting the use requirements of different application scenarios. In the prior art, the locking mechanism includes a first base, a second base and a locking assembly. The second base is rotatably connected to the first base and can rotate around the rotation axis relative to the first base, and the second base is used to connect the wheels. The locking assembly includes a locking member, an operating member and a limiting bracket. The locking member is used to lock (directional limit) or unlock (release limit) the first base and the second base. The operating member is used to limit the locking member to lock the first base and the second base. The limiting bracket includes a bracket body and an elastic limiting arm. The bracket body is connected to the first base, and the elastic limiting arm is used to limit the operating member. However, after the elastic limiting arm limits the operating member multiple times, so that the operating member restricts the locking member from switching between the locked position and the unlocked position, the elastic limiting arm will experience significant irreversible deformation, and then the locking member will fail to lock, resulting in abnormal wheel directional limit. Utility Model Content

[0003] The main purpose of the utility model is to provide a locking mechanism and a child stroller, aiming to solve the technical problem of abnormal directional limiting of wheels.

[0004] To achieve the above-mentioned purpose, a first embodiment of the present application provides a locking mechanism, comprising a first base, a second base and a locking assembly, wherein the second base is rotatably connected to the first base and rotates relative to the first base around a rotation axis, and the rotation axis is parallel to a direction from the first base to the second base;

[0005] The locking assembly comprises:

[0006] A locking member, slidably connected to the first base, for locking or unlocking the first base and the second base;

[0007] an operating member, slidably connected to the first base, and used to restrict the locking member from locking the first base and the second base; and

[0008] A limiting bracket, comprising a bracket body and an elastic limiting arm, wherein the bracket body is connected to the first base, and the elastic limiting arm is used to limit the operating member;

[0009] Wherein, the first base includes a stopper, and the stopper and the operating member respectively abut against two opposite sides of the elastic limiting arm.

[0010] In the above embodiment, the locking mechanism includes a first base, a second base and a locking assembly. The second base is rotatably connected to the first base and rotates relative to the first base around a rotation axis, and the rotation axis is parallel to the direction from the first base to the second base. The locking assembly includes a locking member, an operating member and a limiting bracket. The locking member is slidably connected to the first base, and the locking member is used to lock or unlock the first base and the second base. The operating member is slidably connected to the first base, and the operating member is used to limit the locking member to lock the first base and the second base. The limiting bracket includes a bracket body and an elastic limiting arm. The bracket body is connected to the first base, and the elastic limiting arm is used to limit the operating member. In the prior art, the elastic limiting arm limits the operating member for multiple times, so that after the operating member limits the locking member to switch between the locked position and the unlocked position, the elastic limiting arm will be significantly and irreversibly deformed, and then the locking member will fail to lock, resulting in abnormal wheel directional limit. The first base of the present scheme includes a stop portion, and the stop portion and the operating member respectively abut against the opposite sides of the elastic limit arm. Therefore, the stop portion can stop and limit the elastic limit arm, effectively suppressing the elastic limit arm from deforming significantly toward the stop portion, preventing locking failure, and allowing the locking member to accurately switch between the locked position and the unlocked position, thereby ensuring the stability of the wheel directional limit.

[0011] In some embodiments, the direction from the first base to the second base is a first direction;

[0012] The locking member is configured to slide relative to the first base along the first direction to a locking position for locking the first base and the second base, or to slide in the opposite direction of the first direction to an unlocking position for unlocking the first base and the second base;

[0013] The operating member is configured to move relative to the first base in the reverse direction along the first direction to a limiting position to limit the movement of the locking member to the locking position, and the operating member can also move relative to the first base along the first direction to a releasing position to release the restriction on the locking member;

[0014] The bracket body is connected to the first base, the elastic limiting arm extends along the first direction and one end of the elastic limiting arm is connected to the bracket body, the elastic limiting arm has a first limiting structure and a second limiting structure distributed along the first direction, and the operating member is connected to the first limiting structure when located at the limiting position, and is connected to the second limiting structure when located at the releasing position;

[0015] The stopper and the operating member respectively abut against two opposite sides of the elastic limiting arm along a second direction, and the second direction is perpendicular to the first direction.

[0016] In the above embodiment, the stopper can effectively suppress the elastic limiting arm from being significantly deformed along the second direction, prevent the elastic limiting arm from being significantly and irreversibly deformed, and ensure the stability of the wheel directional limiting.

[0017] In some embodiments, the first base has a first end wall facing the second base, and the first end wall abuts against the second base or is spaced apart from the second base;

[0018] The first end wall is recessed with a receiving groove, the bracket body is located at the opening of the receiving groove, and the elastic limiting arm extends into the receiving groove and is located at a side of the bracket body away from the second base.

[0019] In the above embodiment, the elastic limiting arm can extend into the accommodating groove to realize assembly connection, which can ensure the stability of the assembly connection between the limiting bracket and the first base, and can make the overall structure of the locking mechanism more compact, and the assembly connection operation of the limiting bracket is convenient and quick.

[0020] In some embodiments, the stopper abuts against an end of the elastic limiting arm away from the bracket body;

[0021] The stopper is protruding from the bottom wall of the receiving groove; and / or the stopper is protruding from the inner peripheral wall of the receiving groove.

[0022] In the above embodiment, the stop portion can abut against the end of the elastic limit arm away from the bracket body. Compared with the scheme in which the stop portion abuts against the end of the elastic limit arm close to the bracket body, this scheme can ensure the stability of the stop portion's stopping and limiting of the elastic limit arm, and effectively suppress the elastic limit arm from undergoing large irreversible deformation; the stop portion can be protruding from the bottom wall of the accommodating groove, and the stop portion can be spaced from the inner circumferential wall of the accommodating groove, that is, the stop portion can produce a certain degree of elastic deformation, so that the stop portion can perform flexibly elastic limit stopping on the elastic limit arm, which can not only ensure the stability of locking and releasing the operating part, but also enable the operating part to switch smoothly between the locked position and the released position.

[0023] In some embodiments, a positioning groove is recessed on the outer peripheral wall of the first base arranged around the rotation axis, and the positioning groove extends along a third direction to connect with the accommodating groove, and the third direction is perpendicular to the first direction. The bracket body is provided with a positioning protrusion, and the positioning protrusion extends into the positioning groove.

[0024] In the above embodiment, the positioning protrusion extends into the positioning groove, which can ensure the accuracy and stability of the assembly connection between the limiting bracket and the first base.

[0025] In some embodiments, the first end wall is further provided with a mounting groove, the locking member includes a pin, the pin is arranged in the mounting groove, the locking assembly further includes an elastic member, the elastic member abuts against the pin and the groove wall of the mounting groove respectively, and the elastic member generates a driving force to drive the pin from the locking position to the releasing position;

[0026] The second base includes a second end wall, the second end wall abuts against the first end wall or is spaced apart from the first end wall, the second end wall is provided with a locking hole, the pin extends into the locking hole when located at the locking position, and extends out of the locking hole when located at the releasing position.

[0027] In the above embodiment, the elastic member can keep the pin stably in the locking position, ensure the locking stability of the locking member, and make the process of switching the locking member from the release position to the locking position more convenient and labor-saving; the pin can ensure the stability of the locking mechanism in limiting the wheel direction by extending into and out of the locking hole to achieve locking and unlocking operations.

[0028] In some embodiments, the limiting bracket includes two elastic limiting arms, which are distributed on both sides of the installation slot perpendicular to the first direction, and the operating member includes two matching parts, which are one-to-one matched and connected with the two elastic limiting arms, and the two matching parts are respectively located on both sides of the installation slot perpendicular to the first direction, and the two matching parts are located between the two elastic limiting arms.

[0029] In the above embodiment, the matching portion of the operating member cooperates with the elastic limiting arm of the limiting bracket, which can ensure the stability of the locking and unlocking operations of the locking member.

[0030] In some embodiments, the pin is provided with a locking groove extending along a direction perpendicular to the first direction, and the operating member includes an operating portion and a locking portion connected to each other, the operating portion is located outside the first base, and the locking portion is provided in the locking groove along a direction perpendicular to the first direction, along the first direction, the size of the locking portion is smaller than the size of the locking groove, and when the locking portion is located on the side of the locking groove away from the second base, the operating member is in the release position.

[0031] In the above embodiment, it can be ensured that the operating member will not be misoperated when in the release position, thereby improving the reliability of the wheel directional limiting operation.

[0032] In some embodiments, the operating member includes an operating part and a matching part, the operating part is located outside the first base, one end of the matching part is connected to the operating part, and the other end extends into the first base in a direction perpendicular to the first direction, and a clamping protrusion is provided at the end of the matching part away from the operating part, and the clamping protrusion abuts against the side of the elastic limiting arm away from the operating part.

[0033] In the above embodiment, the clamping protrusion abuts against the elastic limiting arm, which can prevent the elastic limiting arm from being separated from the matching portion in a direction away from the operating portion, thereby ensuring the stability of the assembly connection between the limiting bracket and the operating member.

[0034] In some embodiments, the operating member includes an operating portion and a matching portion, the operating portion is located outside the first base, one end of the matching portion is connected to the operating portion, and the other end extends into the first base along a direction perpendicular to the first direction, and the matching portion is provided with a limiting protrusion;

[0035] The first limiting structure and the second limiting structure are both groove structures, and the limiting protrusion extends into the groove structure to limit the operating member.

[0036] In the above embodiment, the cooperation between the limiting protrusion and the groove structure can effectively improve the stability of the cooperation between the operating member and the limiting bracket, and improve the reliability of the wheel directional limiting operation.

[0037] A second aspect of the present application provides a child stroller, including the locking mechanism as described in the above embodiment;

[0038] A cart body connected to the first base; and

[0039] A wheel is connected to the second base.

[0040] In the above embodiment, the stop portion of the stroller can stop and limit the elastic limit arm, effectively suppressing the elastic limit arm from deforming significantly toward the stop portion, preventing locking failure, and allowing the locking member to accurately switch between the locked position and the unlocked position, thereby ensuring the stability of the wheel directional limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0042] Figure 1 is a three-dimensional schematic diagram of a child stroller in an embodiment of the present application;

[0043] Figure 2 It is a partial schematic diagram of a child stroller in an embodiment of the present application, wherein a locking mechanism and wheels are shown;

[0044] Figure 3 for Figure 2 A partial enlarged view of the portion A in the middle, wherein the first end wall is shown;

[0045] Figure 4 It is a partial schematic diagram of a child stroller in one embodiment of the present application;

[0046] Figure 5 for Figure 4 A partial enlarged view of the area B in the middle, wherein the second end wall and the locking hole are shown;

[0047] Figure 6 It is a partial schematic diagram of a locking assembly in an embodiment of the present application, wherein an operating member, a locking member and an elastic member are shown;

[0048] Figure 7 Schematic diagram of the structure of the limiting bracket in one embodiment of the present application; wherein a first limiting structure and a second limiting structure are shown;

[0049] Figure 8 It is a cross-sectional view of a locking mechanism in an embodiment of the present application along a first direction; wherein the locking member is in an unlocking position;

[0050] Fig. 9 It is a cross-sectional view of the locking mechanism in an embodiment of the present application along the first direction; wherein the operating member is located at the release position and connected to the second limiting structure;

[0051] Fig.10 This is a partial schematic diagram of a first base in an embodiment of the present application; wherein the limiting bracket is arranged at the opening of the receiving groove;

[0052] Fig.11 This is a partial schematic diagram of a first base in an embodiment of the present application, wherein a positioning groove is shown;

[0053] Fig.12 It is a cross-sectional view of the first base along the third direction in one embodiment of the present application, wherein the locking protrusion and the locking portion are shown.

[0054] Description of Figure Numbers:

[0055] Stroller 1;

[0056] Locking mechanism 10;

[0057] A first base 100;

[0058] A stopper 110;

[0059] A first end wall 120;

[0060] Accommodating groove 121; groove bottom wall 1211; inner peripheral wall 1212;

[0061] Mounting slot 122;

[0062] Peripheral wall 130; Positioning groove 131;

[0063] Second base 200; second end wall 210; locking hole 211;

[0064] Locking assembly 300;

[0065] Locking member 310; pin 311; latching slot 3111;

[0066] Operating member 320;

[0067] Matching portion 321; clamping protrusion 3211; limiting protrusion 3212;

[0068] Operation unit 322;

[0069] A locking portion 323;

[0070] Limit bracket 330;

[0071] Bracket body 331; positioning protrusion 3311;

[0072] Elastic limiting arm 332; first limiting structure 3321; second limiting structure 3322;

[0073] Elastic member 340;

[0074] Axis of rotation 400;

[0075] Cart body 20; seat 201; front frame 202; rear frame 203; locking joint 204; push handle 205; wheels 30;

[0076] The first direction is X; the second direction is Y; the third direction is Z.

[0077] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0079] The stroller includes a locking mechanism, which can limit the wheels in a directional manner so that the wheels can only move forward and backward in a single direction. The locking mechanism can also release the limit on the wheels so that the wheels can move forward and backward in multiple directions, thereby meeting the use requirements of different application scenarios. In the prior art, the locking mechanism includes a first base, a second base and a locking assembly. The second base is rotatably connected to the first base and can rotate around the rotation axis relative to the first base, and the second base is used to connect the wheels. The locking assembly includes a locking member, an operating member and a limiting bracket. The locking member is used to lock (directional limit) or unlock (release limit) the first base and the second base. The operating member is used to limit the locking member to lock the first base and the second base. The limiting bracket includes a bracket body and an elastic limiting arm. The bracket body is connected to the first base, and the elastic limiting arm is used to limit the operating member. However, after the elastic limiting arm limits the operating member multiple times, so that the operating member restricts the locking member from switching between the locked position and the unlocked position, the elastic limiting arm will experience significant irreversible deformation, and then the locking member will fail to lock, resulting in abnormal wheel directional limit.

[0080] In view of this, the first embodiment of the present application proposes a locking mechanism 10, which can ensure the stability of the directional limit of the wheel 30. It should be noted that the locking mechanism 10 can be used in a child stroller 1, and can also be used in a wheelchair, etc. Some embodiments of the present application take the locking mechanism 10 used in a child stroller 1 as an example for explanation. Figure 1 The child stroller 1 includes a stroller body 20 and wheels 30. Figures 1 to 12 The locking mechanism 10 of the embodiment of the present application is introduced. Specifically, the locking mechanism 10 includes a first base 100, a second base 200 and a locking assembly 300.

[0081] Reference Figure 1 The first base 100 can be a base on the upper side of the locking mechanism 10, and the second base 200 can be a base on the lower side of the locking mechanism 10. The upper part of the first base 100 can be connected to the cart body 20, the lower part of the first base 100 can be connected to the upper part of the second base 200, and the lower part of the second base 200 can be connected to the wheel 30. The second base 200 is rotatably connected to the first base 100. In order to facilitate the description and understanding of the specific rotation settings of the second base 200 and the first base 100, a rotation axis 400 is defined. The rotation axis 400 is parallel to the direction from the first base 100 to the second base 200. Figure 3 The direction in is used as a reference, and the rotation axis 400 is the direction from top to bottom. In addition, the second base 200 can rotate around the rotation axis 400 relative to the first base 100, that is, the wheel 30 connected to the second base 200 can move forward and backward in multiple directions to meet the needs of different application scenarios.

[0082] Reference Figures 2 to 7, the specific configuration of the locking assembly 300 is introduced below. The locking assembly 300 includes a locking member 310, an operating member 320 and a limiting bracket 330. The locking member 310 is used to lock or unlock the first base 100 and the second base 200, and the locking member 310 is slidably connected to the first base 100. Specifically, when the locking member 310 slides to the unlocking position relative to the first base 100, that is, the second base 200 can rotate normally relative to the first base 100, thereby driving the wheel 30 to move forward and backward in multiple directions. When the locking member 310 slides to the locking position relative to the first base 100, the locking member 310 can inhibit the second base 200 from rotating relative to the first base 100, that is, the wheel 30 can only move forward and backward in a fixed single direction.

[0083] Reference Figures 6 to 9 The operating member 320 is used to drive and limit the locking member 310 to be in the locked position and the unlocked position. The operating member 320 is slidably connected to the first base 100. The operating member 320 can slide relative to the first base 100 to drive the locking member 310 to slide to the unlocked position, and can also slide relative to the first base 100 to drive the locking member 310 to slide to the locked position, so that the locking member 310 can be stabilized in the locked position or the unlocked position to meet the corresponding movement requirements of the wheel 30. The operating member 320 can improve the convenience of position switching of the locking member 310.

[0084] Reference Figures 7 to 9 The limiting bracket 330 is used to limit the operating member 320. Specifically, the limiting bracket 330 includes a bracket body 331 and an elastic limiting arm 332. The bracket body 331 is connected to the first base 100. The elastic limiting arm 332 can limit the operating member 320 so that the operating member 320 can stably drive the locking member 310 to switch between the locked position and the unlocked position.

[0085] Reference Fig. 9 The first base 100 includes a stop portion 110, and the stop portion 110 and the operating member 320 respectively abut against the opposite sides of the elastic limiting arm 332, that is, when the elastic limiting arm 332 limits the operating member 320, the stop portion 110 can stop and limit the elastic limiting arm, effectively preventing the elastic limiting arm 332 from producing a large irreversible deformation.

[0086] In the technical solution of the present application, the locking mechanism 10 includes a first base 100, a second base 200 and a locking assembly 300. The second base 200 is rotatably connected to the first base 100 and rotates relative to the first base 100 around a rotation axis 400, and the rotation axis 400 is parallel to the direction from the first base 100 to the second base 200. The locking assembly 300 includes a locking member 310, an operating member 320 and a limiting bracket 330. The locking member 310 is slidably connected to the first base 100, and the locking member 310 is used to lock or unlock the first base 100 and the second base 200. The operating member 320 is slidably connected to the first base 100, and the operating member 320 is used to limit the locking member 310 to lock the first base 100 and the second base 200. The limiting bracket 330 includes a bracket body 331 and an elastic limiting arm 332. The bracket body 331 is connected to the first base 100, and the elastic limiting arm 332 is used to limit the operating member 320. In the prior art, after the elastic limiting arm limits the operating member for multiple times, so that the operating member limits the locking member to switch between the locked position and the unlocked position, the elastic limiting arm will be greatly and irreversibly deformed, and then the locking member 310 will be locked and failed, resulting in abnormal directional limit of the wheel 30. The first base 100 of this solution includes a stopper 110, and the stopper 110 and the operating member 320 respectively abut against the opposite sides of the elastic limiting arm 332, so that the stopper 110 can stop and limit the elastic limiting arm 332, effectively suppress the elastic limiting arm 332 from being greatly deformed toward the stopper 110, prevent the locking from failing, and enable the locking member 310 to accurately switch between the locked position and the unlocked position, thereby ensuring the stability of the directional limit of the wheel 30.

[0087] Reference Figures 6 to 9 , the specific locking and unlocking process of the locking member 310 on the first base 100 and the second base 200 is described below. In some embodiments, in order to facilitate the description and understanding of the specific movement direction of each component of the locking assembly 300, a first direction X is defined, and the direction from the first base 100 to the second base 200 is the first direction X. Figure 1The first direction X is a direction from top to bottom, and the opposite direction of the first direction X is a direction from bottom to top. The locking member 310 is configured to have a locking position and an unlocking position. Specifically, in the locking position, the locking member 310 can lock the first base 100 and the second base 200, that is, the second base 200 can be restricted from rotating relative to the first base 100, and the locking member 310 can slide to the locking position along the first direction X, and the wheel 30 can only move forward and backward along a single fixed direction with the second base 200 due to the restriction of the locking member 310. In the unlocking position, the locking member 310 can unlock the first base 100 and the second base 200, and the locking member 310 can slide to the unlocking position along the opposite direction of the first direction X, that is, the second base 200 can rotate normally relative to the first base 100, and the wheel 30 can move forward and backward along multiple directions with the second base 200.

[0088] Reference Figure 8 and Fig. 9 , the specific limiting process of the operating member 320 on the locking member 310 is described below. The operating member 320 can move relative to the first base 100 in the reverse direction of the first direction X to the limiting position, thereby limiting the locking member 310 from moving to the locking position, so that the wheel 30 can only move forward and backward in a single direction. The operating member 320 can also move relative to the first base 100 in the first direction X to the releasing position, thereby releasing the limitation on the locking member 310, so that the wheel 30 can move forward and backward in multiple directions.

[0089] Reference Fig. 9 The specific limiting process of the limiting bracket 330 on the operating member 320 is described below. The bracket body 331 of the limiting bracket 330 is connected to the first base 100, and the elastic limiting arm 332 extends along the first direction X and one end is connected to the bracket body 331. The specific extension length of the elastic limiting arm 332 can be determined according to actual conditions. The elastic limiting arm 332 has a first limiting structure 3321 and a second limiting structure 3322 distributed along the first direction X. Fig. 9 With reference to the orientation in FIG. 3 , the first limiting structure 3321 can be located at the lower side of the second limiting structure 3322. When the operating member 320 is located at the limiting position, the first limiting structure 3321 is connected, and when the operating member 320 is located at the releasing position, the second limiting structure 3322 is connected.

[0090] In order to facilitate description and understanding of the relative position relationship between the stopper 110, the operating member 320 and the elastic limiting arm 332, a second direction Y is defined, and the second direction Y is perpendicular to the first direction X. Fig. 9 The first direction X is a vertical direction, and the second direction Y is a horizontal direction. The stopper 110 and the operating member 320 are respectively abutted against the two opposite sides of the elastic limiting arm 332 along the second direction Y. Fig. 9The stopper 110 and the operating member 320 respectively contact the two sides of the elastic limiting arm 332 along the left and right directions. The stopper 110 of this solution can effectively prevent the elastic limiting arm 332 from being greatly deformed along the second direction Y, prevent the elastic limiting arm 332 from being greatly and irreversibly deformed, and ensure the stability of the directional limiting of the wheel 30.

[0091] Reference Figure 3 , Fig.10 and Fig.11 , the specific connection settings between the limiting bracket 330 and the first base 100 of some embodiments are introduced below. The first base 100 has a first end wall 120 facing the second base 200. In some embodiments, the first end wall 120 can abut the second base 200. In other embodiments, the first end wall 120 can be spaced from the second base 200, that is, other components can be used to connect the first end wall 120 and the second base 200. Some embodiments of the present application are described by taking the first end wall 120 abutting the second base 200 as an example. Fig.11 , the first end wall 120 may be recessed with a receiving groove 121, and the receiving groove 121 may accommodate the limiting bracket 330. Specifically, the bracket body 331 may be located at the opening of the receiving groove 121, and the elastic limiting arm 332 may be located on the side of the bracket body 331 away from the second base 200. The elastic limiting arm 332 may extend into the receiving groove 121. Specifically, the elastic limiting arm 332 may partially extend into the receiving groove 121, or may fully extend into the receiving groove 121. Some embodiments of the present application are described by taking the elastic limiting arm 332 fully extending into the receiving groove 121 as an example. The elastic limiting arm 332 of the present solution may extend into the receiving groove 121 to realize assembly connection, that is, it can ensure the stability of the assembly connection between the limiting bracket 330 and the first base 100, and can make the overall structure of the locking mechanism 10 more compact, and the assembly connection operation of the limiting bracket 330 is convenient and quick.

[0092] Reference Fig. 9 , the specific abutment arrangement of the stopper 110 and the elastic limiting arm 332 is described below. In some embodiments, the stopper 110 can abut against the end of the elastic limiting arm 332 away from the bracket body 331. The elastic limiting arm 332 is connected to the bracket body 331 and extends in a direction away from the bracket body 331. Compared with the solution in which the stopper abuts against the end of the elastic limiting arm close to the bracket body, this solution can ensure the stability of the stopper 110 for the elastic limiting arm 332, and effectively suppress the elastic limiting arm 332 from undergoing significant irreversible deformation.

[0093] Reference Fig. 9, the specific setting position of the stopper 110 is introduced below. In some embodiments, the stopper 110 can be protruded from the bottom wall 1211 of the receiving groove 121. In other embodiments, the stopper 110 can be protruded from the inner peripheral wall 1212 of the receiving groove 121. Some embodiments of the present application are described by taking the stopper 110 protruding from the bottom wall 1211 of the receiving groove 121 as an example. It should be noted that when the stopper 110 is protruded from the bottom wall 1211 of the receiving groove 121, the stopper 110 can be spaced from the inner peripheral wall 1212 of the receiving groove 121, that is, the stopper 110 can produce a certain degree of elastic deformation, so that the stopper 110 can perform a flexible elastic limit stop on the elastic limit arm 332, which can not only ensure the stability of locking and releasing the operating member 320, but also enable the operating member 320 to switch smoothly between the locked position and the released position.

[0094] Reference Figure 7 and Fig.11 , the specific assembly arrangement of the limiting bracket 330 and the first base 100 is described below. In some embodiments, the outer peripheral wall 130 of the first base 100 arranged around the rotation axis 400 is recessed with a positioning groove 131. In order to facilitate the description and understanding of the specific structure of the positioning groove 131, a third direction Z is defined. The third direction Z is perpendicular to the first direction X. Fig.11 The first direction X may point to the front-to-back direction, and the third direction Z may point to the up-down direction. The positioning groove 131 may extend along the third direction Z to connect to the receiving groove 121. It is understood that the receiving groove 121 may also be spaced apart from the positioning groove 131. Figure 7 , the bracket body 331 is provided with a positioning protrusion 3311, and the positioning protrusion 3311 can extend into the positioning groove 131. In other embodiments, the bracket body 331 can be provided with a positioning groove 131, and the first base 100 can be provided with a positioning protrusion 3311, and the positioning protrusion 3311 can extend into the positioning groove 131. The specific setting can be determined according to the actual situation. Some embodiments of the present application are described by taking the bracket body 331 as an example in which the positioning protrusion 3311 is provided, and the first base 100 is provided with the positioning groove 131. The positioning protrusion 3311 of this solution extends into the positioning groove 131, which can ensure the accuracy and stability of the assembly connection between the limit bracket 330 and the first base 100.

[0095] The specific locking and unlocking arrangement of the locking member 310 is described below. Figure 3 and Figure 8 The first end wall 120 is provided with a recessed mounting groove 122. Figure 6The locking member 310 includes a pin 311, which can be disposed in the mounting groove 122. The locking assembly 300 also includes an elastic member 340, which can abut against the pin 311 and the groove wall of the mounting groove 122, respectively. Specifically, the elastic member 340 can abut against the groove bottom wall of the mounting groove 122. The elastic member 340 can generate a driving force to drive the pin 311 from the locking position to the release position, that is, the elastic member 340 of the present solution can keep the pin 311 stably in the locking position, ensure the stability of the locking of the locking member 310, and make the process of switching the locking member 310 from the release position to the locking position more convenient and labor-saving.

[0096] Reference Figure 4 and Figure 5 The second base 200 includes a second end wall 210, and the second end wall 210 may be arranged toward the first base 100. In some embodiments, the second end wall 210 may abut against the first end wall 120. In other embodiments, the second end wall 210 may be spaced apart from the first end wall 120. Some embodiments of the present application are described by taking the second end wall 210 abutting against the first end wall 120 as an example. Figure 5 and Figure 8 The second end wall 210 may be provided with a locking hole 211, and the locking hole 211 may be adapted to be arranged with a pin 311. It can be understood that when the pin 311 is in the locking position, it may extend into the locking hole 211, and when the pin 311 is in the releasing position, it may extend out of the locking hole 211. The pin 311 of this solution can achieve locking and unlocking operations by extending into and out of the locking hole 211, thereby ensuring the stability of the locking mechanism 10 in limiting the directional position of the wheel 30.

[0097] Reference Figure 7 , Fig. 9 and Fig.12 The specific structure of the limiting bracket 330 is described below. In some embodiments, the limiting bracket 330 includes two elastic limiting arms 332. The two elastic limiting arms 332 are distributed on both sides of the mounting groove 122 perpendicular to the first direction X. Fig. 9 The orientation in is used as a reference, that is, the two elastic limiting arms 332 are distributed on both sides of the installation slot 122 along the left and right directions. Figure 7 The operating member 320 includes two matching parts 321, and the two matching parts 321 are respectively located on both sides of the mounting groove 122 perpendicular to the first direction X, and the two matching parts 321 are located between the two elastic limiting arms 332. It should be noted that the two matching parts 321 can be matched and connected with the two elastic limiting arms 332 in a one-to-one correspondence. Specifically, the matching parts 321 can abut against the elastic limiting arms 332. In this solution, the matching parts 321 of the operating member 320 cooperate with the elastic limiting arms 332 of the limiting bracket 330, which can ensure the stability of the locking and unlocking operations of the locking member 310.

[0098] Reference Figure 6 and Figure 7 The following describes the specific matching arrangement of the locking member 310 and the operating member 320. In some embodiments, the pin 311 is provided with a locking groove 3111, and the locking groove 3111 penetrates the pin 311 in a direction perpendicular to the first direction X so as to Figure 6 The positioning slot 3111 is extended along the left-right direction. The operating member 320 includes an operating portion 322 and a positioning portion 323 connected to each other. It should be noted that along the first direction X, with reference to Figure 6 The size of the locking portion 323 is smaller than the size of the locking slot 3111 in the up-down direction, that is, the locking portion 323 can move in the locking slot 3111. The operating portion 322 can be located outside the first base 100 to facilitate the operation of relevant personnel. The locking portion 323 can be inserted into the locking slot 3111 in a direction perpendicular to the first direction X. When the locking portion 323 is located on the side of the locking slot 3111 away from the second base 200, the operating member 320 is in the released position, which can ensure that the operating member 320 will not be misoperated in the released position, thereby improving the reliability of the directional limiting operation of the wheel 30.

[0099] Reference Figure 6 , Figure 7 and Fig.12 The following describes the specific assembly arrangement of the operating member 320 in some embodiments. The operating member 320 includes an operating portion 322 and a matching portion 321. The operating portion 322 is located outside the first base 100 to facilitate operation by relevant personnel. One end of the matching portion 321 is connected to the operating portion 322, and the other end extends into the first base 100 in a direction perpendicular to the first direction X. Fig.12 As a reference, the upper end of the matching portion 321 can extend into the first base 100 in the up-down direction, and the lower end of the matching portion 321 can be connected to the operating portion 322. The end of the matching portion 321 away from the operating portion 322 can be provided with a clamping protrusion 3211, and the clamping protrusion 3211 can abut against the side of the elastic limiting arm 332 away from the operating portion 322. The clamping protrusion 3211 of the present solution abuts against the elastic limiting arm 332, which can prevent the elastic limiting arm 332 from detaching from the matching portion 321 in the direction away from the operating portion 322, thereby ensuring the stability of the assembly connection between the limiting bracket 330 and the operating member 320.

[0100] Reference Figure 6 , Figure 7 and Fig.12 , the specific assembly arrangement of the operating member 320 of some embodiments is introduced below. The operating member 320 includes an operating portion 322 and a matching portion 321. The operating portion 322 is located outside the first base 100, which is convenient for relevant personnel to operate. One end of the matching portion 321 can be connected to the operating portion 322, and the other end can extend into the first base 100 in a direction perpendicular to the first direction X. Fig.12 With reference to the orientation in the figure, the upper end of the matching portion 321 can extend into the first base 100 along the up-down direction, and the lower end of the matching portion 321 can be connected to the operating portion 322. The matching portion 321 can be provided with a limiting protrusion 3212. The first limiting structure 3321 and the second limiting structure 3322 of the elastic limiting arm 332 are both groove structures, and the limiting protrusion 3212 can extend into the groove structure to achieve the limiting of the operating member 320. In other embodiments, the matching portion 321 can be provided with a groove structure, and the first limiting structure 3321 and the second limiting structure 3322 of the elastic limiting arm 332 can both be provided with a limiting protrusion 3212, and the limiting protrusion 3212 can extend into the groove structure. The limiting protrusion 3212 of this solution cooperates with the groove structure, which can effectively improve the stability of the cooperation between the operating member 320 and the limiting bracket 330, and improve the reliability of the directional limiting operation of the wheel 30.

[0101] The second embodiment of the present application proposes a child stroller 1, which includes the locking mechanism 10 of the above embodiment, and the child stroller 1 also includes a stroller body 20 and wheels 30. In some embodiments, the stroller body 20 can be connected to the first base 100, and the wheels 30 can be connected to the second base 200. Specifically, the stroller body 20 includes a seat 201, the front side of the seat 201 can be connected to the front frame 202, and the rear side can be connected to the rear frame 203. The bottom of the front frame 202 and the bottom of the rear frame 203 can both be connected to the wheels 30. The stroller body 20 also includes a push handle 205 and a locking joint 204. The locking joint 204 can connect the push handle 205 and the seat 201. The specific structure of the child stroller 1 can be determined according to actual conditions. It should be noted that the locking mechanism 10 can be used for directional limiting of the front wheel 30, and can also be used for directional limiting of the rear wheel 30. Some embodiments of the present application are described by taking the locking mechanism 10 used for positioning limiting of the front wheel 30 as an example.

[0102] The first base 100 in the stroller 1 of the present embodiment includes a stopper 110, and the stopper 110 and the operating member 320 respectively abut against the opposite sides of the elastic limiting arm 332. Therefore, the stopper 110 can stop and limit the elastic limiting arm 332, effectively suppressing the elastic limiting arm 332 from being greatly deformed toward the stopper 110, preventing locking failure, and enabling the locking member 310 to accurately switch between the locked position and the unlocked position, thereby ensuring the stability of the directional limitation of the wheel 30.

[0103] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present application, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. When a directional reference is introduced in a specific embodiment, if the direction is not specifically limited to unidirectional, the direction can be unidirectional or bidirectional (two directions parallel to each other and opposite to each other). Whether it is unidirectional or bidirectional is based on what can be achieved by ordinary technicians in this field. When the directional reference is bidirectional, it should be considered that two different parallel embodiments are introduced at the same time.

[0104] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0105] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the application concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A locking mechanism, characterized in that: The invention comprises a first base, a second base and a locking assembly, wherein the second base is rotatably connected to the first base and rotates relative to the first base around a rotation axis, and the rotation axis is parallel to a direction from the first base to the second base; The locking assembly comprises: A locking member, slidably connected to the first base, for locking or unlocking the first base and the second base; an operating member, slidably connected to the first base, and used to restrict the locking member from locking the first base and the second base; and A limiting bracket, comprising a bracket body and an elastic limiting arm, wherein the bracket body is connected to the first base, and the elastic limiting arm is used to limit the operating member; Wherein, the first base includes a stopper, and the stopper and the operating member respectively abut against two opposite sides of the elastic limiting arm.

2. The locking mechanism according to claim 1, characterized in that: The direction from the first base to the second base is a first direction; The locking member is configured to slide relative to the first base along the first direction to a locking position for locking the first base and the second base, or to slide in the opposite direction of the first direction to an unlocking position for unlocking the first base and the second base; The operating member is configured to move relative to the first base in the reverse direction along the first direction to a limiting position to limit the movement of the locking member to the locking position, and the operating member can also move relative to the first base along the first direction to a releasing position to release the restriction on the locking member; The bracket body is connected to the first base, the elastic limiting arm extends along the first direction and one end of the elastic limiting arm is connected to the bracket body, the elastic limiting arm has a first limiting structure and a second limiting structure distributed along the first direction, and the operating member is connected to the first limiting structure when located at the limiting position, and is connected to the second limiting structure when located at the releasing position; The stopper and the operating member respectively abut against two opposite sides of the elastic limiting arm along a second direction, and the second direction is perpendicular to the first direction.

3. The locking mechanism according to claim 2, characterized in that: The first base has a first end wall facing the second base, and the first end wall abuts against the second base or is spaced apart from the second base; The first end wall is recessed with a receiving groove, the bracket body is located at the opening of the receiving groove, and the elastic limiting arm extends into the receiving groove and is located at a side of the bracket body away from the second base.

4. The locking mechanism according to claim 3, characterized in that: The stopper abuts against one end of the elastic limiting arm away from the bracket body; The stopper is protruding from the bottom wall of the receiving groove; and / or the stopper is protruding from the inner peripheral wall of the receiving groove.

5. The locking mechanism according to claim 3, characterized in that: The outer peripheral wall of the first base arranged around the rotation axis is recessed with a positioning groove, and the positioning groove extends along a third direction to connect with the accommodating groove, and the third direction is perpendicular to the first direction. The bracket body is provided with a positioning protrusion, and the positioning protrusion extends into the positioning groove.

6. The locking mechanism according to claim 3, characterized in that: The first end wall is further provided with a mounting groove, the locking member includes a pin, the pin is arranged in the mounting groove, the locking assembly further includes an elastic member, the elastic member abuts against the pin and the groove wall of the mounting groove respectively, and the elastic member generates a driving force to drive the pin from the locking position to the releasing position; The second base includes a second end wall, the second end wall abuts against the first end wall or is spaced apart from the first end wall, the second end wall is provided with a locking hole, the pin extends into the locking hole when located at the locking position, and extends out of the locking hole when located at the releasing position.

7. The locking mechanism according to claim 6, characterized in that: The limiting bracket includes two elastic limiting arms, and the two elastic limiting arms are distributed on both sides of the installation slot perpendicular to the first direction. The operating member includes two matching parts, and the two matching parts are matched and connected with the two elastic limiting arms in a one-to-one manner, and the two matching parts are respectively located on both sides of the installation slot perpendicular to the first direction, and the two matching parts are located between the two elastic limiting arms.

8. The locking mechanism according to claim 6, characterized in that: The pin is provided with a locking groove extending along a direction perpendicular to the first direction, and the operating member includes an operating portion and a locking portion connected to each other, the operating portion is located outside the first base, and the locking portion is provided in the locking groove along a direction perpendicular to the first direction, along the first direction, the size of the locking portion is smaller than the size of the locking groove, and when the locking portion is located on the side of the locking groove away from the second base, the operating member is in the release position.

9. The locking mechanism according to claim 2, characterized in that: The operating member includes an operating part and a matching part, the operating part is located outside the first base, one end of the matching part is connected to the operating part, and the other end extends into the first base along a direction perpendicular to the first direction, and a clamping protrusion is provided at the end of the matching part away from the operating part, and the clamping protrusion abuts against the side of the elastic limiting arm away from the operating part.

10. The locking mechanism according to claim 2, characterized in that: The operating member includes an operating portion and a matching portion, wherein the operating portion is located outside the first base, one end of the matching portion is connected to the operating portion, and the other end of the matching portion extends into the first base along a direction perpendicular to the first direction, and the matching portion is provided with a limiting protrusion; The first limiting structure and the second limiting structure are both groove structures, and the limiting protrusion extends into the groove structure to limit the operating member.

11. A baby stroller, characterized in that: include: The locking mechanism according to any one of claims 1 to 10; A cart body connected to the first base; as well as A wheel is connected to the second base.

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