TH34994B - Drive system for electric toothbrushes and the like. - Google Patents

Abstract

The DC60 drive system for moving a practical device such as a toothbrush or the like includes a motor driven cam that rotates around the axis of rotation by a motor. The cams have a closed-loop cam groove that is aligned with the axis of rotation. The control assembly has been Placement between the cam and the head of the device for practice. The control assembly has a slit. Control that extends completely through the control assembly. The rotatable assembly is arranged between the control assembly and the head of the instrument for operation. The drive system is also included. The drive shaft, which has a drive end that is installed freely in the cam grooves. The drive shaft protrudes through the control strait. and through a rotatable assembly with the driven end of the drive shaft that has been The workshop is connected to the driving interface of the head of the device. The cams are rotated in the direction of the drive shaft's movement and are controlled by Drive shaft, which is restricted for sliding movement in the control strait. The drive shaft can also Rotating because it is installed freely in the cam groove, the torque and the angle of oscillation passed to Movable operational parts are determined by the location of the assembly. Rotating axis relative to the head for practice The drive system for moving the operating device, such as a toothbrush or the like, includes a cam driven that rotates around the axis of rotation by the motor. The cams have a closed-loop cam groove that is aligned with the axis of rotation. The control assembly has been Placement between the cam and the head of the device for practice. The control assembly has a slit. Control that extends completely through the control assembly. The rotatable assembly is arranged between the control assembly and the head of the instrument for operation. The drive system is also included. The drive shaft, which has a drive end that is freely contacted in the cam grooves. The drive shaft protrudes through the control strait. and through a rotatable assembly with the driven end of the drive shaft that has been The workshop is connected to the driving interface of the head of the device. The cams are rotated in the direction of the drive shaft's movement and are controlled by Drive shaft, which is restricted for sliding motion in the control strait. The drive shaft can also Rotating because it is installed freely in the cam groove, the torque and the angle of oscillation passed to Movable action parts are defined by the location of the assembly. Rotating axis relative to the head for practice

Claims (9)

All rights reserved which will not appear on the advertisement page: 1. A system for transmitting motion to an operating device having a head, wherein the head, including the operating device capable of being moved detachably from the head and having a class of drive devices comprising a motor, wherein said motor shaft is capable of being rotated; a cam driven rotatably about an axis of rotation by said motor shaft, wherein said cam having an outer surface with a closed cam groove having inner and outer walls and eccentric with respect to said axis of rotation; a head of the operating device distal to said cam; a control member having a control gap extending entirely through the control member; a rotating member disposed between said control member and the head of said reaction device, wherein said rotating member has a through hole, wherein the head of said operating device has a drive connection fitted to said operating device and disposed towards said rotating member; a drive shaft having a longitudinal axis and a driven end and a driven end, the driven and driven ends having a common axis along the longitudinal axis. Said driven end independently mounted and supported in said cam groove, said drive shaft extending through said control slot and through said hole in said pivot member, said driven end operationally mounted to said drive connection of said head of said device to cause the operating device to move independently of the head in response to the movement of said drive shaft, said longitudinal axis of said drive shaft differing from and at an angle to said cam axis of rotation, said control slot controls the path of movement of said drive shaft such that the rotation of said cam causes said driven end to move along said inner wall and said outer wall of said cam groove in response to the position of said drive shaft in said control slot with said drive shaft moving rotationally through said pivot member about said axis as said driven end moves along said inner wall and said outer wall of said cam groove while said drive shaft moves slidably in said control slot to transmit the rotational movement of said drive shaft to said driven end and to said drive connection for the movement of said operating device. 2. The drive system of claim 1, wherein said control channel has a linear shape to cause said drive shaft to move in a planar manner. 3. The system of claim 2, wherein said cam grooves are circular. 4. The system of claim 2, wherein said cam grooves are not circular. 5. The system of claim 4, wherein said cam grooves are elliptical. 6. The system of claim 2, wherein said control channel extends radially from said axis of rotation. 7. The system of claim 1, wherein said control channel has a non-linear shape. 8. The system of claim 7, wherein said control channel has a curved shape. 9. The joint system of claim 1, wherein said cam grooves do not extend beyond said axis of rotation. 1 0 The joint system of claim 1, wherein said driving connection includes a recess in a portion of the head of said operating device, and said driven end of said drive shaft terminates in such a way as to be mounted like a ball in the recess of said head of said device. 1 1 The joint system of claim 1, wherein said drive shaft extends through a resilient bearing in said through-hole of said rotating member. 1 2 The joint system of claim 1, wherein said operating device is a toothbrush, wherein said head is a cleaning head having an outer surface, wherein said operating member is a cleaning member projecting outward from said outer surface and is situated at least on said head portion, and said driving connection is a recess in said portion of said head. 1 3 The drive system of claim 12, wherein said control recess has a linear shape such that 1 4 The drive system of claim 13, wherein said cam grooves are circular. 1 5 The drive system of claim 14, wherein said rotating member is a thin plate, and said control member is a thin plate. 1 6 The drive system of claim 15, wherein said control slots extend along a radius from said axis of rotation, and said cam grooves do not extend beyond said axis of rotation. 1 7 The drive system of claim 16, wherein said operating device is made to oscillate back and forth through a range not greater than 30°. 1 8 The drive system of claim 12 has a straight line shape making an angle not parallel to said outer surface of said head. 1 9 The drive system for transmitting motion to the operating device on the operating device, comprising: a head having a operating device rotatably mounted on the head, wherein the operating device moves independently of the head; a plurality of parts of the operating device mounted to the operating device; Motors having a rotating motor shaft, the cams being driven to rotate about an axis of rotation by said motor shaft, said cams having an outer surface with closed cam grooves on the inner and outer walls and offset from said axis of rotation; a control member having a control slot extending entirely through the control member; a rotating member disposed between said control member and said head; a rotating member having a through hole, wherein said head has a drive connection fitted to the tool for operating said and is disposed towards the rotating member about said axis; a drive shaft having a longitudinal axis and a driven and driven end, such that the driven and driven ends have a common axis along the longitudinal axis; said driven ends being freely mounted and supported in said cam grooves; said driven ends being fitted to operate said drive connection of said head to cause said tool for operating said head to move in response to the movement of said drive shaft, the longitudinal axis of said drive shaft being different from, and at an angle to, the cam axis of said rotation. Said control slots control the path of motion of said drive shaft, such that rotation of said cam causes said driven end to move along said cam groove in response to the position of said drive shaft in said control slot with said driven shaft moving axially through the rotating member about said axis as said driven end moves along said inner wall and said outer wall of said cam groove, while said driven shaft moves movably in said control slots to transmit the rotational motion about the axis of said drive shaft to said driven end and to said connecting member, driving for at least a portion of the movement of said operating tool. 20 The drive system of claim 19, wherein the movement of the operating tool is oscillatory rotational motion.