WO2013004025A1 - Braking mechanism for child stroller - Google Patents

Abstract

A braking mechanism for a child stroller, provided with a braking state and a releasing state. The braking mechanism comprises a wheel, a braking disc fixedly connected to the wheel, a braking part, a wheel joint rotationally connected to the wheel, an elastic part disposed between the wheel joint and the braking part to provide reset force for the braking part, a rotary handle rotationally connected to the pushing rod of the stroller, and a traction cable connected to the braking part and the rotary handle. The braking disc is provided with a braking groove; the braking part is slidably disposed on the wheel joints; when the braking mechanism is in the braking state, the braking part inserts into the braking groove, and the breaking part and the breaking disc are mutually locked up; and when the braking mechanism is in the releasing state, the braking part disengages from the braking groove, and the braking disc is released. The braking part can be inserted into or disengaged from the braking grooves via the operation of the traction cable, thereby braking or releasing the wheel with the braking mechanism, and the elastic part can reset the braking part after the force applied to the traction cable is removed.

Description

 Brake mechanism for strollers

Technical field

The present invention relates to a stroller, and more particularly to a brake device on a stroller.

Background technique

In the prior art, the main body of the stroller is generally composed of a push rod, a seat frame, a front wheel bracket, a rear wheel bracket, a bottom bracket, etc., and the push rod is usually connected with the seat frame, and the bottom of the front wheel bracket and the rear wheel bracket Install the front and rear wheels separately. A brake mechanism is usually installed on the cart to be used when needed, and the existing brake mechanism is usually mounted on the rear wheel bracket, which includes a brake block and a foot pedal, and the brake block is linked by the foot pedal. Therefore, the brake shoe on the brake block abuts against the rear wheel to brake the rear wheel, and the surface of the brake pad is flattened after a period of use, and the braking ability is lowered, so that the brake mechanism becomes unreliable. In addition, it is not convenient to use the foot to operate the brake mechanism.

Summary of the invention

The invention provides a brake mechanism for a stroller which is convenient to operate and reliable in braking.

In order to achieve the above object, the present invention provides a brake mechanism for a stroller having a brake state including a wheel, a brake member for braking the wheel, and a brake member for braking the brake member An elastic member that provides a restoring force, a rotary handle that is rotatably coupled to the push rod of the cart, and a linkage member that is coupled between the brake member and the rotary handle. The rotating handle has an inner end close to the push rod and an outer end farther from the push rod. When the brake mechanism is in the braking state, the rotating handle is located at the first working position, and when the brake mechanism is in the released state, the rotating handle is located at the second position. In the working position, the outer end of the rotating handle in the first working position is higher than the outer end of the rotating handle in the second working position. By operating the rotary handle, the brake member can be driven by the linkage member, so that the brake mechanism brakes or releases the wheel, and after the force applied to the rotary handle is cancelled, the elastic member can return the brake member to the original state.

Preferably, the wheel is fixedly connected to a brake disc, and the brake disc has a brake groove. When the brake mechanism is in the braking state, the brake component is inserted into the brake groove to jam the brake disc, and the brake component is disengaged when the brake mechanism is in the released state. The brake groove and the brake disc are released.

Further, the braking component may include a brake pin mounting seat and a brake pin, the wheel is rotatably connected to the wheel joint, the wheel joint has a cavity therein, and the brake pin mounting seat is slidably disposed in the cavity of the wheel joint, and the brake pin extends The cavity of the wheel joint is connected to the brake pin mount. When the brake mechanism is in the brake state, the brake pin is inserted into the brake groove. When the brake mechanism is released, the brake pin leaves the brake groove. The brake pin mount moves in the cavity of the wheel joint, the brake pin moves synchronously with the brake pin mount, and the linkage member moves the brake pin by pulling on the brake pin mount.

Further, the linkage member connected to the braking component and the rotating handle is a traction cable. The brake pin mounting seat has a connecting slot and a brake pin mounting hole. One end of the traction cable is connected to the connecting slot, and the brake pin is mounted on the brake. The pin is installed in the hole. The connecting groove and the brake pin mounting hole are respectively arranged to prevent the traction cable from being wound around the brake pin to prevent the brake from malfunctioning.

Further, the wheel joint is provided with a positioning hole, and the positioning hole communicates with the cavity of the wheel joint, and the linkage member extends through the positioning hole into the cavity. This allows the linkage member to be well introduced into the cavity of the wheel joint to connect the brake member while at the same time defining the range of motion of the linkage member to prevent it from entering the area of the wheel.

Further, the elastic member is disposed between the wheel joint and the braking member or between the rotating handle and the push rod, and if disposed between the rotating handle and the push rod, the elastic member is made by the rotating handle and the traction cable. The moving parts provide a reset force. Of course, it is also possible to arrange elastic members between the wheel joint and the brake member, between the rotary handle and the push rod, respectively.

Further, there are preferably a plurality of brake grooves, and a plurality of brake grooves are distributed around the central axis of the wheel. When the brake disc rotates with the wheel, the brake member can be braked by simply inserting it into any of the brake grooves, so that rapid braking can be achieved.

Further, the brake disc may be in the shape of a disc, the brake disc is connected to the same shaft of the wheel, a plurality of brake grooves are arranged along the circumferential direction of the brake disc, and each brake groove extends in the radial direction of the brake disc.

Preferably, there may be two rotating handles, and the two rotating handles are respectively rotatably connected to the push rod through a rotating shaft.

Further, a connecting rod is movably coupled between the two rotating handles, and the connecting portion of the connecting rod and the rotating handle is spaced apart from the rotating shaft for rotatingly connecting the rotating rod to the push rod.

Further, the push rod has an upper open receiving space, and the portion of the two rotating handles connected to the push rod and the connecting rod are accommodated in the receiving space.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: braking and releasing are achieved by the cooperation of the brake component and the brake groove on the brake disc, and the action of the brake mechanism is controlled by pulling the traction cable. The operation is simple and the braking is also very reliable. In practical applications, the rotation is generally used as the handle of the cart, and the brake mechanism can be automatically unlocked by the action of the operator pressing the rotary handle in front of the cart.

DRAWINGS

Figure 1 is an exploded perspective view of an embodiment of the present invention;

Figure 2 is a schematic view showing the assembly of the structure shown in Figure 1, in which the brake mechanism is in a released state;

Figure 3 is a perspective view of a stroller to which the present invention is applied;

Figure 4 is a schematic view showing the assembly of the structure shown in Figure 1, in which the brake mechanism is in a braking state;

Figure 5 is an assembled perspective view of the mechanism of Figure 1, in which the brake mechanism is in a braking state;

Figure 6 is an exploded perspective view showing the brake-distracting control portion of another brake structure according to the present invention;

Figure 7 is an assembled view of the structure shown in Figure 6, in which the brake mechanism is in a braking state;

Figure 8 is an assembled view of the structure shown in Figure 6, in which the brake mechanism is in a released state;

Among them: 1, rotating handle; 11, connecting rod; 12, torsion spring; 2, push rod; 21, grip; 22, rotating handle joint; 3, traction cable; 31, first end; 32, coat end Head; 33, second end; 4, wheel bracket; 5, wheel joint; 51, positioning hole; 52, cavity; 6, wheel; 7, brake disc; 71, brake groove; 8, brake pin mount; 81, connecting groove; 82, brake pin mounting hole; 9, brake pin; 10, compression spring; 20, seat frame.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

1, 2, 4 and 5 show an embodiment of the present invention, wherein the brake mechanism is mainly composed of a wheel 6, a brake disc 7, a brake pin 9, a brake pin mount 8, a compression spring 10, and traction. Cable 3, rotating handle 1 and so on. In the illustrated embodiment, the brake disc 7 has a disk-like configuration, and the brake disc 7 is fixedly connected to the same shaft of the wheel 6. The brake disc 7 is provided with a plurality of brake grooves 71, and the plurality of brake grooves 71 are along the brake disc 7. The circumferential direction is arranged, and each of the brake grooves 71 extends in the radial direction of the brake disk 7. A brake pin mount 8 is arranged on the wheel joint 5, and the wheel joint 5 is rotatably connected to the wheel 6, and the wheel joint 5 has a cavity 52 therein, and the brake pin mount 8 is slidably disposed in the cavity 52. The brake pin mount 8 is provided with a connecting groove 81 and a brake pin mounting hole 82. The second end 33 of the traction cable 3 is connected to the connecting groove 81 of the brake pin mounting seat 8, and the brake pin 9 is mounted to the brake pin mounting hole 82. The brake pin 9 projects out of the cavity 52 of the wheel joint 5.

The compression spring 10 is disposed in the cavity 52 of the wheel joint 5 between the wheel joint 5 and the brake pin mount 8, and the compression spring 10 applies a pressure to the brake pin mount 8 so that the brake pin 9 enters the brake disc 7 In the brake groove 71.

A positioning hole 51 is also formed in the wheel joint 5, and the positioning hole 51 communicates with the cavity 52 of the wheel joint 5, and the traction cable 3 passes through the positioning hole 51 and protrudes into the cavity 52. A jacket end 32 is sleeved on the traction cable 3, and the jacket end 32 is positioned in the positioning hole 51 and positioned in the positioning hole 51. The traction cable 3 enters the cavity 52 through the positioning hole 51, and the range of movement of the traction cable 3 can be restricted to prevent the traction cable 3 from entering the area of the wheel, thereby avoiding problems such as winding. In addition, in actual use, if the second end 33 of the traction cable 3 accidentally falls off the connecting slot 81, the outer sleeve end 32 also limits the second end 33 to prevent the second end. 33 is detached through the positioning hole 51 for maintenance.

The first end 31 of the traction cable 3 is connected to the rotary handle 1, and the rotary handle 1 is rotatably connected with the push rod 2 of the frame. The rotation of the rotary handle 1 causes the traction cable 3 to carry the brake pin mount 8 and the brake pin. 9 moves. In the first embodiment shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the rotary handle 1 has one, and the upper portion of the push rod 2 has a grip 21 extending substantially laterally for the human hand to hold, and the rotary handle 1 is rotatably connected to the grip 21, the user holds the grip 21 in one hand, and the other hand rotates or holds the rotary handle 1, that is, this is a structure in which the one-side operation is used to release the brake.

The rotary handle 1 has an inner end close to the push rod 2 and an outer end far from the push rod 2. When the brake mechanism is in the braking state, the rotary handle 1 is in the first working position, and when the brake mechanism is in the released state, the rotation Putting 1 in the second working position, the outer end of the rotating handle 1 in the first working position is higher than the outer end of the rotating handle 1 in the second working position, that is, the operator is operating the rotating handle 1 to make the brake mechanism When releasing, you need to press down to rotate the handle 1. Although this structural arrangement of the one-side rotary handle 1 is not clearly shown in the drawings, it can be implemented by referring to the configuration of the upper rotary handle 1 shown in Figs. 7 and 8 to be described later.

A torsion spring 12 is disposed between the rotary handle 1 and the push rod 2 for resetting the rotary handle 1, that is, when the operator's hand leaves the rotary handle 1, the torsion spring 12 provides an elastic force to cause the rotation to return 1 Go to the first working position, so that the brake mechanism returns to the braking state.

The push rod 2 is a tubular rod such that the traction cable 3 can be lined from the lumen of the push rod 2.

In the embodiment shown in the figures, the first end 31 of the traction cable 3 is attached to the inner end of the rotary handle 1 to minimize the length to which the traction cable 3 is exposed.

The brake mechanism operates in the following manner: the rotary handle 1 is pressed down, so that the traction cable 3 is moved up by the pulling action of the rotary handle 1, and the brake pin 9 and the brake pin mount 8 are synchronously moved up under the pulling of the traction cable 3, Until the brake pin 9 is disengaged from the brake groove 71, the brake disc 7 and the wheel 6 are released. After the rotary handle 1 is released, the rotation 1 is reset under the force of the torsion spring 12, and the traction cable 3 is also reset, and the brake pin mount 8 and the brake pin 9 are moved downward by the compression spring 10, so that the brake is applied. The pin 9 is reinserted into the brake groove 71 of the brake disc 7, and the brake disc 7 and the wheel 6 are again braked.

In order to make the operation more natural, the installation angle of the rotary handle 1 can be arranged such that the rotary handle 1 is inclined at an angle relative to the horizontal plane when it is not subjected to the external force of the operator, and the outer end thereof is tilted up, as shown in FIG. That's what it shows. When the operator wants to push the cart, in order to hold the rotating handle 1, the rotary handle 1 is first flattened, and the outer end of the rotary handle 1 is pressed down. In the process, the rotary handle 1 is rotated relative to the push rod 2, and the rotation is performed. When the inner end of 1 is moved up, the traction cable 3 will be pulled and moved upward, so that the brake pin 9 and the brake pin mount 8 will move upwards synchronously, and the brake pin 9 will be disengaged from the brake groove 71 to make the wheel 6 When released, the cart can be pushed.

In practical application, the wheel joint 5 is fixedly connected to the wheel bracket 4, and the wheel bracket 4 can also adopt a tubular structure, so that the traction cable 3 can be routed from the lumen of the wheel bracket 4, and the wheel bracket 4 is preferably opened. The apertures are provided for the traction cables 3 to pass through, and these apertures are a very common technical means for those skilled in the art and will not be described herein with reference to the drawings.

As shown in FIG. 3, the brake mechanism can be arranged on the rear wheel as shown in the figure, and the wheel bracket 4 is connected to the seat frame 20 of the cart. In the illustrated embodiment, the wheel bracket 4 and the push The rods 2 are not connected, and it is preferable to provide small holes in the wheel bracket 4 to facilitate the insertion and exit of the traction cables 3.

6-8 shows a second embodiment of the present invention, and the main difference from the first embodiment is that there are two rotating handles 1, the grip portion is eliminated in the upper portion of the push rod 2, and the two rotary handles 1 are respectively passed. A rotating shaft is rotatably coupled to the upper portion of the push rod 2. The operator simultaneously rotates the two rotary handles 1, so that the traction cable 3 pulls the brake pin mount 8 and the brake pin 9 to move, so that the brake mechanism can be released, that is, this is a structure that uses a bilateral operation to control the brake release mode. . When the outer end of the two rotary handles 1 is higher than when the brake mechanism is in the released state, when the operator wants to push the vehicle, the two sides need to hold the rotary handle 1 and press the rotary handle 1 down. To control the release of the brake mechanism. The mounting angle of the rotary handle 1 can be referred to the first embodiment, that is, the rotary handle 1 is inclined at an angle relative to the horizontal plane when the external force is not applied by the operator, and the outer end thereof is tilted up, as shown in FIG. In this way, the operator habitually presses the outer end of the rotary handle 1 before pushing the car.

Two brake mechanisms can be provided, arranged on two wheels 6, each of which is controlled by a traction cable 3 to release the brakes to release the wheels 6. In actual use, it is necessary to press the two rotations 1 to push the car, and those skilled in the art can implement the changes according to the above description, and details are not described herein.

It is also possible to have only one brake mechanism, and the two rotary handles 1 are operated by a traction cable 3 to simultaneously control the brake mechanism.

Regardless of the number of brake mechanisms, the two rotary handles 1 can achieve the linkage mode. In the embodiment shown in FIG. 6, the two rotating handles 1 are movably connected to a connecting rod 11, the connecting portion of the connecting rod 11 and the respective rotating handles 1 and the rotating shaft for rotating the rotating handle 1 to the push rod 2. A distance is opened, and when one rotary handle is pressed down, the other rotation member 1 is automatically rotated by the rotation of the link 11. In this case, there may be only one torsion spring 12 disposed between one of the rotary handles 1 and the push rod 2.

An upper open receiving space can be arranged on the push rod 2, and the portion of the two rotating handles 1 connected to the push rod 2 and the connecting rod 11 are accommodated in the receiving space to increase the aesthetic appearance of the car. In the embodiment shown in Figs. 6-8, the upper portion of the push rod 2 has a rotary handle connecting seat 22 having a U-shaped cross section, and the aforementioned receiving space is provided by the rotary joint connecting seat 22.

The above embodiments are merely illustrative of the technical concept and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the present invention and to implement the present invention, and the scope of the present invention is not limited thereto. Equivalent variations or modifications made in accordance with the spirit of the invention, such as the use of a rod instead of a traction cable, or the use of other structures for the brake components, etc., are intended to be encompassed within the scope of the invention.

Claims (11)

A brake mechanism for a stroller having a brake state and a release state, characterized in that the brake mechanism comprises wheel; a brake component for braking the wheel to bring the brake mechanism into a braking state; An elastic member for providing a restoring force to the brake member; Rotating handle, rotating and rotating with the push rod of the cart, the rotation has an inner end close to the push rod and an outer end far from the push rod, and the rotating handle is located first when the brake mechanism is in the braking state a working position, when the brake mechanism is in a released state, the rotating handle is located at the second working position, and the outer end of the rotating handle at the first working position is higher than the outer end of the rotating handle at the second working position; A linkage member that is coupled to the brake member and the rotary handle, respectively. 2. The brake mechanism according to claim 1, wherein the wheel is fixedly connected to a brake disc, and the brake disc has a brake groove. When the brake mechanism is in a braking state, the brake member is inserted into the brake groove to chuck the brake disc. When the brake mechanism is released, the brake member is released from the brake groove and the brake disc is released. 3. The brake mechanism according to claim 2, wherein said brake member comprises a brake pin mount and a brake pin coupled to the brake pin mount, the wheel being rotatably coupled to a wheel joint having a cavity therein The brake pin mounting seat is slidably disposed in the cavity of the wheel joint, and the brake pin extends out of the cavity of the wheel joint. When the brake mechanism is in the braking state, the brake pin is inserted into the brake groove, and the brake mechanism is used as the brake mechanism. When in the released state, the brake pin leaves the brake groove. 4. The brake mechanism according to claim 3, wherein the linkage member connected to the brake member and the rotary handle is a traction cable, the brake pin mounting seat has a connecting groove and a brake pin mounting hole, and one end of the traction cable is connected to the connection. In the slot, the brake pin is mounted in the brake pin mounting hole. 5. The brake mechanism according to claim 3, wherein the wheel joint is provided with a positioning hole, and the positioning hole communicates with the cavity of the wheel joint, and the linkage member extends through the positioning hole into the cavity. 6. The brake mechanism according to claim 3, wherein the elastic member is disposed between the wheel joint and the brake member or between the rotary handle and the push rod. 7. The brake mechanism according to claim 2, wherein the brake groove has a plurality of brake grooves distributed around a central axis of the wheel. 8. The brake mechanism according to claim 7, wherein the brake disc has a disc shape, the brake disc is connected to the same shaft of the wheel, the plurality of brake grooves are arranged along the circumferential direction of the brake disc, and the brake grooves are along the radial direction of the brake disc. extend. 9. A brake mechanism according to any one of claims 1-8, wherein there are two rotary handles, and the two rotary handles are rotatably coupled to the push rod via a rotary shaft. 10. The brake mechanism according to claim 9, wherein a connecting rod is movably coupled between the two rotating handles, and a joint between the connecting rod and the rotating handle is spaced apart from a rotating shaft connecting the rotating shaft to the push rod. . 11. The brake mechanism according to claim 10, wherein the push rod has an upper open receiving space, and the portion of the two rotating handles connected to the push rod and the connecting rod are housed in the receiving space.

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