Brake handle having supporting frame

A brake handle having a supporting frame, a handle and a push unit; wherein: the supporting frame has a receiving space; a piston is installed in the receiving space; the handle has a first sliding groove; the push unit has a second sliding groove; the second sliding groove is installed with an adjusting unit; the handle and push unit are pivoted to the supporting frame; the handle and push unit are pivoted to the supporting frame; the push unit resists against the piston; the adjusting unit passes through the first sliding groove and second sliding groove so as to pivotally install the handle and the push unit; and a screw rod is screwed to the adjusting unit. The screwing operation of the screw rod with respect to the adjusting unit will adjust an elevation of the handle.

FIELD OF THE INVENTION

The present invention relates to brakes, and particularly to a brake handle having a supporting frame which has a firm structure and has a wide range for adjustment. Furthermore the force applied can be controlled effectively.

BACKGROUND OF THE INVENTION

Brakes are important for traffic safety, especially for a high speed driving. If the braking device is not good, even the driver has very good technology in driving, he (or she) can not effectively control a bicycle and thus, safety driving can not be achieved. Thus a good brake is very important in driving.

In one prior art braking pump, an oil pressure braking system has a pump. A retainer is installed to the pump. The retainer is used as a fulcrum for adjusting between a releasing position and a braking position. In braking, an actuating rod in the handle will reduce inwards so as to have a braking effect. A braking handle has a seat having a transversal assembly hole. The hole has an opening facing to the pump. A spring is assembled to the hole of the handle. A control block is also assembled to the seat. The control block has a control rod which is protruded from the opening and resists against the actuating rod. A sealing block is installed to the opening of the seat for sealing the assembly hole.

However the prior art braking device is transversally penetrated by a handle and a screw rod resisting against the pneumatic device for providing barking force by pneumatic pressures. The angle adjustable is finite. The barking handle is not in parallel to the pneumatic rod, but is tilt to the pneumatic rod. Thus, the contact therebetween is not complete. The pressure can not be transferred completely, the contact surface of the stud and pneumatic rod is easy to wear. For a long time, the whole structure will destroy. Moreover, the pressure is directly transferred to the braking pump. The oil pressure of the braking pump is controlled by the pressure from the finger. The braking is one stage, but not multiple stages. Thus, the control is inconvenient, even some accident occurs.

Thus, there is an eager demand for a novel design which is more stable and more effective.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide a brake handle having a supporting frame which is a firm structure and has a wide range for adjustment. Furthermore the force applied can be controlled effectively.

To achieve above objects, the present invention provides a brake handle having a supporting frame, a handle and a push unit; wherein: the supporting frame has a receiving space; a piston is installed in the receiving space; the handle has a first sliding groove; the push unit has a second sliding groove; the second sliding groove is installed with an adjusting unit; the handle and push unit are pivoted to the supporting frame; the handle and push unit are pivoted to the supporting frame; the push unit resists against the piston; the adjusting unit passes through the first sliding groove and second sliding groove so as to pivotally install the handle and the push unit; and a screw rod is screwed to the adjusting unit; a push rod installed in a through hole of the supporting frame; the push rod resisting against the push unit; the push unit is movable around the rotary shaft; when the push rod is driven to resist against the push unit, the push unit is pushed so that a push unit tightly resists against the piston; on the contrary, when the push rod screws out from the through hole of the supporting frame, no push force applied to the push unit so as to retain a predetermined distance to the piston; and thus the sensitivity in braking is adjusted. The screwing operation of the screw rod with respect to the adjusting unit, the first sliding groove and the second sliding groove will move with respect to one another s as to adjust an elevation of the handle.

DETAILED DESCRIPTION OF THE INVENTION

Referring toFIGS. 1 to 3, the brake handle1of the present invention is illustrated. The present invention has the following elements.

A supporting frame6has a mounting hole61for mounting the brake handle to a vehicle. The supporting frame6is formed with a receiving space64. An elastic unit43and a piston4are mounted into the receiving space64. One end of the piston4is a force receiving end41and another end of the piston4is a push end42. The supporting frame6is formed with a through hole63for installing with a push rod631. The supporting frame6is formed with a frame pivotal hole62.

A handle2has one end installed with a holding portion22. Another end of the handle2is formed with a handle pivotal hole23and a first sliding groove21. The first sliding groove21has a long elliptical shape.

A push unit3is formed with a pivotal hole33and a second sliding groove31. The second sliding groove31has a long elliptical shape. Further, the push unit3is pivotally installed with a push block32by using a male stud321to engage with a female stud322.

Referring toFIG. 2, in assembly, a rotary shaft65passes through the handle pivotal hole23of the handle2, the push pivotal hole33of the push unit3and the frame pivotal hole62of the supporting frame6for combining the handle2, push unit3and supporting frame6. Two ends of the rotary shaft65are fixed by studs and rings651. The push unit3is installed in the handle2and the handle2is installed in the supporting frame6. Thus, the handle2and push unit3are pivoted in the supporting frame6. The first sliding groove21of the handle2and the second sliding groove31of the push unit3are passed by an adjusting unit24. An adjusting cover25encloses the adjusting unit24. A screw rod5screws through a through hole652of the rotary shaft65, the push unit3and the adjusting unit24. One end of the screw rod5is fixed as a fixing end51by using a fixing buckle511to fix the fixing end51to a lower end of the push unit3. Thus the screw rod5is freely pivoted along a radial direction of the adjusting unit24. The screw rod5is formed with threads for screwing to the threads of the adjusting unit24. Another end of the screw rod5is a moving end52. A spring521and a rotation unit522are assembled to the moving end52.

Thus, the push unit3is pivoted to the handle2and the push unit3is installed in the handle2. The adjusting unit24passes through the first sliding groove21and the second sliding groove31. The screwing movement of the screw rod5, the position of the adjusting unit24is adjusted so as to adjust the position of the handle2. Thus the size of the brake handle1of the present invention is adjusted to fit the size of the user's hand.

The push rod631resists against the push unit3. The push unit3is movable around the rotary shaft65. When the push rod631is driven to resist against the push unit3, the push unit3is pushed so that the push block32tightly resists against the piston4. On the contrary, when the push rod631screws out from the through hole63of the supporting frame6, no push force applied to the push unit3so as to retain a predetermined distance to the piston4. Thus the sensitivity in braking is adjusted.

Referring toFIGS. 4 and 5, when it is desired to adjust the elevation of the handle2, the rotation unit522is screwed and thus the rotation unit522will drive the screw rod5so that the adjusting unit24will move along the screw rod5and the adjusting unit24moves upwards and downwards along the second sliding groove31. Moreover, the adjusting unit24passes through the first sliding groove21and second sliding groove31. When the adjusting unit24moves along the second sliding groove31, the adjusting unit24also resists against the first sliding groove21so that the first sliding groove21moves along the adjusting unit24. Furthermore the handle2having the first sliding groove21is pivoted to the rotary shaft65of the supporting frame6. Thus the handle2is driven by the adjusting unit24to pivot along the rotary shaft65. As a result, the elevation of the handle2is adjusted.

Referring toFIGS. 6 and 7, the push rod631is formed with threads and is screwed to the through hole63of the supporting frame6. SeeFIG. 6, when the push rod631is rotated to a front side, it only slightly resists against the push unit3. The push unit3is at a normal state and the push block32of the push unit3slightly resists against the piston4. A predetermined distance is formed between the piston4and the oil hole71of an oil tank. When the handle2is pressed, the handle2will drive the push unit3to cause the push block32resists against the piston4. Due to the distance between the piston4and the oil hole71of the oil tank7, when the handle2is pressed, the piston4will push toward the oil hole71for braking. Therefore, a short time period from pressing the handle2to the barking action is required. Thus, the braking operation is not sensitive. Referring toFIG. 7, if the push rod631is moved to the backside, when the push rod631screws inwards to resists against the push unit3, the push unit3will rotate around the rotary shaft65to cause the push block32of the push unit3to resist against the piston4. The piston4will push forwards to flush with the oil hole71of the oil tank7. When the user presses the handle2, the piston4will resist against the oil hole71of the oil tank7to actuate the braking operation. The braking operation is sensitive. Thus the braking sensitivity is controlled by moving the push rod631to the front side or back side.

Referring toFIG. 8, the second embodiment of the present invention is illustrated. In this embodiment, those identical to the above mentioned embodiment will not be further described herein. Only those difference are disclosed. In this embodiment, the holding portion22of the handle2is separable. The holding portion22is locked to the handle2by screws. It is only necessary to detach the screw for separating the holding portion22from the handle2.