Brake device for stroller

Abstract

A brake device for a stroller is characterized by being composed of a first brake mechanism, a second brake mechanism and a cross rod. Each of the first brake mechanism and the second brake mechanism comprises a brake gear ring, a brake limiting swing rod and a cam; the brake gear ring and the wheel are coaxially fixed; the brake limiting swing rod is hinged to a frame of the stroller, a brake pin is arranged at one end of the brake limiting swing rod, and a protruding shaft is arranged at the other end of the brake limiting swing rod. The two ends of the transverse rod are rotationally arranged on a frame of the stroller, and the cam is fixedly arranged at the end of the transverse rod. When the brake releasing position of the cam is matched with the cam shaft in an abutting mode, the brake limiting swing rod is in a brake releasing state, and the brake pin of the brake limiting swing rod is separated from brake teeth of the brake gear ring. When the brake position of the cam abuts against the cam shaft in a matched mode, the brake limiting swing rod is in a brake state, and the brake pin of the brake limiting swing rod and brake teeth of the brake gear ring are clamped, matched and locked. And the cams at the two ends are driven to rotate by driving the cross rod, so that the brake limiting swing rod is switched between a brake releasing state and a brake state.

Description

Technical Field

[0001] The utility model relates to a child (baby) stroller, in particular to a brake device for the child stroller. Background Art

[0002] A baby stroller generally includes a frame, front wheels, rear wheels, and wheel seats connecting the front and rear wheels to the frame; and also includes a brake device to facilitate parking or moving the baby stroller.

[0003] Existing brake devices are typically designed for the rear wheels, resulting in complex structures and numerous components. For example, the brake device disclosed in utility model patent No. CN 218172373 U also includes brake cables, guide wheels, and other components to coordinate the braking action of the two rear wheels. However, this device suffers from the following drawbacks:

[0004] 1. Too many parts and complex structure;

[0005] 2. The brake line and guide wheel are linked, which makes it easy for the system to get stuck and the failure rate is high. Utility Model Content

[0006] The utility model aims to provide a brake device for a child stroller, so as to simplify the structure and reduce the failure rate.

[0007] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a brake device for a child stroller, comprising a first brake mechanism, a second brake mechanism and a crossbar;

[0008] The first and second brake mechanisms are provided corresponding to a pair of wheels of the stroller, and have the same structure, including a brake gear ring, a brake limit swing arm, and a cam. The brake gear ring is fixed coaxially with the wheel, and brake teeth are provided on the inner or outer edge of the brake gear ring. The brake limit swing arm is hinged to the frame of the stroller, with the axial direction of the hinge shaft being parallel to the axis of the wheel. A brake pin is provided on one end of the brake limit swing arm, which cooperates with the brake teeth of the brake gear ring, and a cam is provided on the other end of the brake limit swing arm.

[0009] The two ends of the crossbar are rotatably mounted on the vehicle frame, with the two ends correspondingly located beside the two wheels, and the length direction of the crossbar is parallel to the axis of the wheels; the cam is fixedly mounted on the end of the crossbar, and the working surface of the cam is provided with a brake release position and a brake position corresponding to the cam shaft;

[0010] The brake limit swing arm has a brake release state and a brake state. When the brake release position of the cam is abutted against the cam shaft, the brake limit swing arm is in the brake release state, and its brake pin is disengaged from the brake teeth of the brake gear ring; when the brake position of the cam is abutted against the cam shaft, the brake limit swing arm is in the brake state, and its brake pin is engaged and locked with the brake teeth of the brake gear ring; by driving the cross bar to simultaneously drive the cams at both ends to rotate, the brake limit swing arm is switched between the brake release state and the brake state.

[0011] In the above solution, the crossbar is provided with a treading portion, so as to drive the crossbar to rotate by stepping on the treading portion. Further, the crossbar is provided with two treading portions, one positive and one negative, extending radially upward.

[0012] In the above solution, the brake teeth are arranged on the inner edge of the brake gear ring, that is, an internal tooth structure.

[0013] In the above scheme, the outer contour of the cam serves as the working surface, and the first brake mechanism and the second brake mechanism both further include an elastic member, which acts on the brake limit rocker or cam, and its elastic force forces the cam shaft to abut against the cam working surface.

[0014] In the above solution, a plug section or a sleeve section is protruded from the axial direction of the cam, and the plug section or the sleeve section is sleeved on the end of the cross bar and fixedly connected.

[0015] In the above scheme, the wheel is composed of a left wheel body and a right wheel body stacked in the axial direction, and a bracket is extended from the frame and located between the left wheel body and the right wheel body; the brake ring gear is located between the opposite surfaces of the left wheel body and the right wheel body, and the brake limit rocker is also hidden between the left wheel body and the right wheel body, and an accommodating avoidance groove is provided on the bracket corresponding to the brake limit rocker.

[0016] The utility model has the following effects:

[0017] 1. The utility model is composed of a crossbar and two sets of brake mechanisms (including a cam, a brake limit rocker and a brake gear). The brake mechanism has a small number of parts, a simple and clear structure, is easy to assemble, and has a low production cost.

[0018] 2. The utility model is easy to operate. By driving the crossbar, the brake mechanisms at both ends can be braked and released synchronously.

[0019] 3. The brake of the utility model has high working reliability and is not easy to get stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective schematic diagram of the first viewing angle of the entire embodiment of the present invention;

[0021] Figure 2A perspective diagram of the second viewing angle of the embodiment of the present invention as a whole;

[0022] Figure 3 This is a schematic diagram of the exploded parts of an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the principle of the brake release state of an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the principle of the braking state of an embodiment of the present utility model.

[0025] In the above figures: 1. First brake mechanism; 11. Brake ring gear; 111. Brake gear; 12. Brake limit rocker; 121. Brake pin; 122. Cam; 123. Articulated shaft; 13. Cam; 13a. Release position; 13b. Brake position; 131. Jam section; 14. Elastic member; 2. Second brake mechanism; 3. Crossbar; 31. Pedal; 4. Wheel; 41. Left wheel body; 42. Right wheel body; 43. Axle; 5. Frame; 51. Bracket; 511. Accommodate avoidance groove. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example

[0027] A brake device for a child stroller, see Figure 1-Figure 5 As shown:

[0028] The brake device is composed of a first brake mechanism 1, a second brake mechanism 2 and a crossbar 3;

[0029] The first brake mechanism 1 and the second brake mechanism 2 are provided corresponding to a pair of wheels 4 of the stroller, and are preferably provided for the rear wheels.

[0030] See Figure 1 、 Figure 2 As shown, the frame 5 of the baby stroller includes at least two brackets 51 extending downward, and the wheels 4 are rotatably connected to the corresponding brackets 51 through wheel axles 41.

[0031] See Figure 1 、 Figure 2 and Figure 3 As shown, the wheel 4 is composed of a left wheel body 41 and a right wheel body 42 stacked in the axial direction, and the bracket 51 is located between the left wheel body 41 and the right wheel body 42. The middle part of the wheel axle 41 passes through the bracket 51, and its two ends are fixed to the left wheel body 41 and the right wheel body 42.

[0032] See Figure 1 、 Figure 2 and Figure 3 As shown, the first brake mechanism 1 and the second brake mechanism 2 have the same structure, and both include a brake ring gear 11 , a brake limit rocker 12 and a cam 13 .

[0033] See also Figure 1 、 Figure 2 and Figure 3 As shown, the brake gear ring 11 is fixed coaxially with the wheel 4, and brake teeth 111 are provided on the inner or outer edge of the brake gear ring 11. Specifically, as shown in the example in the figure, the brake teeth 111 are provided on the inner edge of the brake gear ring 11, that is, an internal tooth structure.

[0034] See also Figure 1 、 Figure 2 and Figure 3 As shown, the brake limit rocker 12 is hinged to the frame 5 of the stroller, specifically the bracket 51, and the hinge axis 123 of the brake limit rocker 12 is parallel to the axis of the wheel 4. A brake pin 121 is provided on one end thereof to cooperate with the brake teeth 111 of the brake gear ring 11, and a convex shaft 122 is provided on the other end thereof.

[0035] See also Figure 1 、 Figure 2 and Figure 3 As shown, both ends of the cross bar 3 are rotatably arranged on the frame 5 of the child stroller, specifically connected between two brackets 51, and its ends are rotatably connected to the brackets 51 around their own axes, and the length direction of the cross bar 3 is parallel to the axis of the wheel 4, and the two ends of the cross bar 3 are located on the sides of the wheel 4 corresponding to the wheel 4.

[0036] See also Figure 1 、 Figure 2 and Figure 3 As shown, the cam 13 is fixedly arranged on the end of the cross bar 3. Specifically, a plug segment 131 or a sleeve segment is protruded on the axis of the cam 13. The plug segment 131 or the sleeve segment is sleeved on the end of the cross bar 3 and fixedly connected, so that the cam 13 is fixed relative to the cross bar 3 and rotates around the axis of the cross bar 3 as the cross bar 3 rotates.

[0037] See also Figure 1 、 Figure 2 and Figure 3 As shown, the working surface of the cam 13 is provided with a brake release position 13a and a brake position 13b corresponding to the convex shaft 122.

[0038] See also Figure 1 、 Figure 2 and Figure 3As shown, the outer contour of the cam 13 serves as the working surface. The first brake mechanism 1 and the second brake mechanism 2 also include an elastic member 14, which is an elastic element or spring. The elastic member 14 acts on the brake limit swing rod 12 or the cam 13. Its elastic force forces the cam shaft 122 to abut against the working surface of the cam 13, so that the cam 13 can drive the brake limit swing rod 12 to swing at any time.

[0039] See also Figure 1 、 Figure 2 and Figure 3 As shown, the elastic member 14 is a coil spring, which is disposed between the brake limit rocker 12 and the bracket 51 .

[0040] described Figure 4 As shown above, the hinge rotation point of the brake limit rocker 12 is marked as point c, and the rotation center of the cam 13 is point d.

[0041] The brake limit swing rod 12 has a brake release state and a brake state. When the brake release position 13a of the cam 13 is in contact with the convex shaft 122, Figure 4 As shown, the brake limit rocker 12 is in the brake release state, and the brake pin 12 is disengaged from the brake tooth 111 of the brake gear ring 11; when the brake position 13b of the cam 13 abuts against the convex shaft 122, as shown in FIG. Figure 5 As shown, the brake limit rocker 12 is in the braking state, and its brake pin 121 is engaged and locked with the brake teeth 111 of the brake gear ring 11.

[0042] During operation, the cams 13 at both ends are driven to rotate by driving the cross bar 3, and the working surface of the cam 13 is abutted against the convex shaft 122 to drive the brake limit rocker 12 to swing, so as to achieve the conversion between the release state and the braking state.

[0043] The cross bar 3 is provided with a treading portion 31 extending radially upward, so as to drive the cross bar 3 to rotate by stepping on the treading portion 31. For the convenience of operation, the cross bar 3 is provided with two treading portions 31 extending radially upward, one positive and one negative. The two treading portions 31 are arranged on both sides of the cross bar 3 like a pair of wings, so that the cross bar 3 can be easily rotated clockwise or counterclockwise by stepping on it.

[0044] See also Figure 1-5 As shown, the brake gear ring 11 is specifically arranged between the opposite surfaces of the left wheel body 41 and the right wheel body 42, and the brake limit swing rod 12 is also hidden between the left wheel body 41 and the right wheel body 42. A accommodating avoidance groove 511 is provided on the bracket 51 corresponding to the brake limit swing rod 12, so that the brake gear ring 11 and the brake limit swing rod 12 are not visible to the outside, making the appearance more beautiful.

[0045] The cam 13 is shown as being located at the inner side wall of the bracket 51, and the convex shaft 122 on the brake limit rocker 12 extends out from the wall opening of the bracket to cooperate with the working surface of the cam 13. Of course, in practice, the cam 13 can also be arranged on the inside of the bracket 51.

[0046] The embodiments described are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A brake device for a child stroller, characterized in that: It is composed of a first brake mechanism (1), a second brake mechanism (2) and a crossbar (3); The first brake mechanism (1) and the second brake mechanism (2) are provided corresponding to a pair of wheels (4) of the stroller. The first brake mechanism (1) and the second brake mechanism (2) have the same structure and both include a brake gear ring (11), a brake limit swing rod (12) and a cam (13); the brake gear ring (11) is fixed coaxially with the wheel (4), and a brake tooth (111) is provided on the inner edge or the outer edge of the brake gear ring (11); the brake limit swing rod (12) is hinged to the frame (5) of the stroller, and the axial direction of the hinge shaft is parallel to the axis of the wheel (4). A brake pin (121) is provided on one end thereof to match the brake tooth (111) of the brake gear ring (11), and a cam shaft (122) is provided on the other end thereof; The two ends of the cross bar (3) are rotatably mounted on the frame (5) of the stroller, and the two ends are correspondingly located beside the two wheels (4), and the length direction of the cross bar (3) is parallel to the axis of the wheel (4); the cam (13) is fixedly mounted on the end of the cross bar (3), and a brake release position (13a) and a brake position (13b) are provided on the working surface of the cam (13) corresponding to the cam shaft (122); The brake limit swing arm (12) has a brake release state and a brake state. When the brake release position (13a) of the cam (13) is in contact with the convex shaft (122), the brake limit swing arm (12) is in the brake release state, and its brake pin (121) is disengaged from the brake teeth (111) of the brake gear ring (11); when the brake position (13b) of the cam (13) is in contact with the convex shaft (122), the brake limit swing arm (12) is in the brake state, and its brake pin (121) is locked with the brake teeth (111) of the brake gear ring (11); the cams (13) at both ends are driven to rotate by the driving cross bar (3), so that the brake limit swing arm (12) is switched between the brake release state and the brake state.

2. The brake device for a child stroller according to claim 1, characterized in that: The crossbar (3) is provided with a treading portion (31) extending radially upward, so as to drive the crossbar (3) to rotate by treading on the treading portion (31).

3. The brake device for a child stroller according to claim 1, characterized in that: The crossbar (3) is provided with two treading portions (31), one positive and one negative, extending radially upward.

4. The brake device for a child stroller according to claim 1, characterized in that: The brake teeth (111) are arranged on the inner edge of the brake gear ring (11), that is, an inner tooth structure.

5. The brake device for a child stroller according to claim 1, characterized in that: The outer contour of the cam (13) serves as a working surface. The first brake mechanism (1) and the second brake mechanism (2) both further include an elastic member (14). The elastic member (14) acts on the brake limit rocker (12) or the cam (13), and its elastic force forces the cam shaft (122) to abut against the working surface of the cam (13).

6. The brake device for a child stroller according to claim 1, characterized in that: A plug section (131) or a sleeve section is protruded axially on the cam (13), and the plug section (131) or the sleeve section is sleeved on the end of the cross bar (3) and fixedly connected.

7. The brake device for a child stroller according to claim 1, characterized in that: The wheel (4) is formed by stacking a left wheel body (41) and a right wheel body (42) in the axial direction. A bracket (51) is provided on the frame (5) and is located between the left wheel body (41) and the right wheel body (42). The brake gear ring (11) is located between the opposite surfaces of the left wheel body (41) and the right wheel body (42). The brake limit swing rod (12) is also hidden between the left wheel body (41) and the right wheel body (42). The bracket (51) is provided with a accommodating avoidance groove (511) corresponding to the brake limit swing rod (12).

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