TWI879010B - Monitor drive mechanism that drives three optoelectronic devices synchronously - Google Patents

Abstract

A transmission mechanism for synchronously driving three photoelectric devices in a monitoring system comprising: a housing, which having a notch, provided to be as an outer case of the monitoring system; a fixed mount for securing to a structure; a base rotatably mounted on the fixed mount and equipped with a first bracket and a second bracket; a longitudinal shaft connecting the fixed mount and the base; a first and a second transverse shaft rotatably mounted at two walls of the notch respectively, with a first and a second photoelectric device positioned at opposite ends of the first and second transverse shafts respectively and a third photoelectric device positioned between two the first and second transverse shafts; a first motor fixedly mounted on the first bracket, driving the longitudinal shaft rotation to synchronously control the first, the second and the third photoelectric devices to rotate horizontally; a second motor fixedly mounted on the second bracket, driving the transverse shaft rotation to synchronously control the first, the second and the third photoelectric devices to rotate vertically.

Description

Monitor drive mechanism that drives three optoelectronic devices synchronously

The present invention relates to a monitor drive mechanism suitable for industrial environment for synchronously driving three optoelectronic devices, and in particular to a monitor drive mechanism which can make the overall volume of the monitor more compact and simple compared with similar products known in the art, and can drive the three optoelectronic devices to rotate synchronously in a first direction and/or a second direction.

With the progress of society and the development of technology, surveillance cameras have become a part of daily life and are widely installed in various places such as traffic intersections, homes, businesses, offices and factories to monitor the environment and prevent potential accidents.

Since most of the surveillance cameras are installed outdoors, they are exposed to the sun, rain, wind and rain for a long time, which can easily cause the surveillance cameras to corrode and break. In addition, outdoor sand, dust or other dirt can easily accumulate in the gaps or lenses, thus affecting the use of the surveillance cameras. For high-grade industrial surveillance cameras used in harsh environments, they must also have explosion-proof performance to prevent the surveillance cameras from being damaged in the event of a strong explosion in the industrial environment, thereby protecting the images captured by the surveillance cameras. Therefore, high-level industrial monitor transmission mechanisms that synchronously drive three optoelectronic devices generally place the monitor in a protective casing to prevent the monitor from being directly exposed to sunlight and rain, human damage, or strong explosions in the environment.

In order to monitor the surrounding environment as widely as possible, most monitors have the function of rotating horizontally and vertically, and in order to obtain clear images at night or in poor light environments, some monitors are equipped with cameras and infrared thermal imagers (collectively referred to as "photoelectric devices"). For example, a known monitor equipped with three types of photoelectric devices, such as a camera and an infrared thermal imager, is to configure the two types of photoelectric devices on the opposite sides and the bottom of the outer shell of the monitor, and drive the shell to rotate horizontally and drive the three photoelectric devices to rotate vertically by a transmission mechanism configured inside the shell, as shown in previous patent documents such as Republic of China Patent No. TW I801210. However, the conventional monitoring device transmission mechanism is not compact and simple enough, and the overall mechanism is too large and complicated.

The main object of the present invention is to provide a monitor drive mechanism that controls three optoelectronic devices to rotate synchronously by a simple and compact drive mechanism.

The monitor transmission mechanism for synchronously driving three optoelectronic devices provided by the present invention may include, in a first embodiment: a housing, a first end of which is formed with a receiving space, and a second end thereof is formed with a notch; a fixing seat, which is fixed to a structure; a base, which is rotatably arranged on the fixing seat and assembled to the first end of the housing to cover the receiving space, and a first bracket and a second bracket are arranged on the base; a longitudinal axis, which connects the fixing seat and the base The base is rotatable relative to the fixed base, and the longitudinal axis is fixedly provided with a first passive wheel; the first transverse axis and the second transverse axis are rotatably arranged on two opposite side walls of the recess of the housing, and the first transverse axis is fixedly provided with a second passive wheel, and opposite ends of the first transverse axis and the second transverse axis are respectively connected to the first optoelectronic device and the second optoelectronic device, and the other ends of the first transverse axis and the second transverse axis are respectively connected to the first optoelectronic device and the second optoelectronic device. A third optoelectronic device is provided; a first motor is fixedly arranged on the first bracket, the first motor is provided with a first active wheel, the first active wheel and the first passive wheel are connected by a first belt; and a second motor is fixedly arranged on the second bracket, the second motor is provided with a second active wheel, the second active wheel and the second passive wheel are connected by a second belt; wherein, the first motor drives the first passive wheel through the first active wheel and the first belt to rotate the base relative to the fixed base, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the horizontal direction, and wherein, the second motor drives the second passive wheel through the second active wheel and the second belt to rotate the first transverse axis and the second transverse axis, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the vertical direction.

The monitor transmission mechanism for synchronously driving three optoelectronic devices provided by the present invention may include, in a second embodiment: a housing, a first end of which is formed with a receiving space, and a second end of which is formed with a notch; a fixing seat, which is fixed to a structure; a base, which is rotatably arranged on the fixing seat and assembled to the first end of the housing to cover the receiving space, and a first bracket and a second bracket are arranged on the base; a longitudinal axis, which connects the fixing seat and the base, so that the base can be relatively moved relative to the fixing seat. The first passive wheel is fixedly disposed on the longitudinal axis; the first transverse axis and the second transverse axis are rotatably disposed on two opposite side walls of the recess of the housing, the first transverse axis is fixedly disposed on the second passive wheel, the opposite ends of the first transverse axis and the second transverse axis are respectively connected to the first optoelectronic device and the second optoelectronic device, and a third optoelectronic device is disposed between the other ends of the first transverse axis and the second transverse axis; the first motor is fixedly disposed on the first bracket, the first The motor is provided with a first driving wheel, and the first driving wheel and the first passive wheel are connected by a first belt; the second motor is fixedly arranged on the second bracket, and the second motor is provided with a second driving wheel; and an idler gear set is arranged on the base, and the idler gear set includes a first idler gear and a second idler gear, the first idler gear engages the second driving wheel, and the second idler gear and the second passive wheel are connected by a second belt; wherein the first motor drives the second driving wheel through the first driving wheel and the first belt A passive wheel causes the base to rotate relative to the fixed base, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the horizontal direction, and wherein the second motor drives the idler gear set through the second active wheel, and then drives the second passive wheel through the second belt to rotate the first transverse axis and the second transverse axis, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the vertical direction.

Preferably, in the first embodiment and the second embodiment of the present invention, the first driving wheel and the second driving wheel can both be timing belt pulleys, and the first belt and the second belt can both be timing belts. Accordingly, the transmission is more reliable.

In order to facilitate the understanding of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. The accompanying drawings show some embodiments of the present invention, but not all of them. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making progressive efforts are within the scope of protection of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art belonging to the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

The terms "first", "second", etc. described below are intended to distinguish components and are not intended to limit the order of configuration or installation of the components.

FIG1 is a three-dimensional external view of the present invention; as shown in FIG1 , the monitor of the present invention includes a fixing base 10 and a base 12 disposed on the fixing base 10, a housing 40 is disposed on the base 12, a first photoelectric device 24 and a second photoelectric device 26 are disposed on opposite sides of the housing 40, a notch 402 is formed at the upper end of the housing 40 and a third photoelectric device 44 is rotatably disposed in the notch 402. The fixing base 10 is used to be fixed to a ceiling, a bracket, a roof, a beam or any appropriate structure. The base 12 can rotate relative to the fixing base 10, so that the first optoelectronic device 24, the second optoelectronic device 26 and the third optoelectronic device 44 rotate along with the housing 40, so that the monitor can monitor a wide range of surrounding environments.

"First Embodiment"

FIG2 shows the structure of the first embodiment of the transmission mechanism of the monitor device of the present invention shown in FIG1 after the housing is removed; FIG3 is a three-dimensional diagram showing the transmission mechanism in more detail after the first and second optoelectronic devices and the housing shown in FIG2 are removed; FIG4 is a three-dimensional diagram showing the transmission mechanism of the first embodiment of the present invention from a second angle; and FIG5 is a three-dimensional diagram showing the transmission mechanism of the first embodiment of the present invention from a third angle.

As shown in FIGS. 2 to 5 , the monitor transmission mechanism for synchronously driving three optoelectronic devices provided by the present invention includes a fixed seat 10, a base 12 and a housing 40; the base 12 is rotatably arranged on the fixed seat 10, and a first bracket 14A and a second bracket 14B are arranged on the base 12. The fixed seat 10 and the base 12 are connected by a longitudinal shaft 16, and a first passive wheel 18 is fixedly arranged on the longitudinal shaft 16. A first motor 28 is axially arranged on the first bracket 14A, and a first active wheel 30 is arranged on the driving shaft of the first motor 28. The first active wheel 30 and the first passive wheel 18 are connected by a first belt 32. A second motor 34 is transversely disposed on the second bracket 14B, and a second driving wheel 36 is disposed on the driving shaft of the second motor 34 . The housing 40 serves as the outer shell of the monitor, and a receiving space is formed at the first end thereof, and a notch 402 is formed at the opposite second end. The opposite side walls 401 of the notch 402 are respectively provided with shaft holes 403, and the first transverse shaft 20A and the second transverse shaft 20B are rotatably arranged in cooperation with bearings in each shaft hole 403, that is, the first transverse shaft 20A and the second transverse shaft 20B are respectively passed through the two sides of each side wall 401; wherein, the second passive wheel 22 is fixedly arranged on the first transverse shaft 20A, and the second passive wheel 22 and the second active wheel 36 are connected by a second belt 38.

Specifically, the fixing base 10 and the base 12 may be circular or rectangular, but the shape is not limited and may be designed in any shape according to actual needs. In the embodiment of the present invention, a circular fixing base 10 is shown with a substantially rectangular base 12; the fixing base 10 and the base 12 are connected in series via a longitudinal axis 16 and cooperate with bearings so that the base 12 can rotate relative to the fixing base 10. In the embodiment of the present invention, based on the consideration of a simple appearance, the opening shape of the accommodation space of the housing 40 is formed into a shape corresponding to the outline of the base 12. After the accommodation space accommodates the aforementioned components and the transmission mechanism except the fixing base 10, the base 12, the first optoelectronic device 24, the second optoelectronic device 26 and the third optoelectronic device 44, the base 12 closes the opening of the accommodation space.

In an embodiment of the present invention, the first optoelectronic device 24 may be a camera, which may be a wide-angle camera, a telephoto camera or a camera with other special functions according to actual needs. The second optoelectronic device 26 may be an infrared thermal imager or other optoelectronic devices. The third optoelectronic device 44 may be a laser or other optoelectronic devices, and may be equipped with a plurality of lenses 441 to be used with the first optoelectronic device 24 and the second optoelectronic device 26 to provide a better monitoring effect.

The transmission mechanism of the present invention disposed in the accommodation space of the housing 40 is used to drive the base 12 to rotate horizontally relative to the fixing base 10, and to drive the first optoelectronic device 24, the second optoelectronic device 26 and the third optoelectronic device 44 to rotate in the vertical direction (i.e., the pitch and elevation directions) at the same time. A first bracket 14A and a second bracket 14B are disposed on the base 12, and the first bracket 14A and the second bracket 14B can be respectively formed by a plurality of metal plates locked on the base 12. One end of the longitudinal shaft 16 is fixed to the fixing base 10, and the other end vertically passes through the base 12, and a first passive wheel 18 is disposed at the end of the longitudinal shaft 16 passing through the base 12. The first bracket 14A is also provided with a first motor 28, and the driving shaft of the first motor 28 is provided with a first driving wheel 30. The first driving wheel 30 and the first passive wheel 18 are connected by a first belt 32, that is, the longitudinal shaft 16 can be driven to rotate through the first driving wheel 30, the first belt 32 and the first passive wheel 18 by the actuation of the first motor 28.

When the shell 40 is covered on the base 12, the first transverse axis 20A and the second transverse axis 20B are respectively passed through the axis holes 403 of the opposite side walls 401 of the recess 402 of the shell 40, and the second passive wheel 22 is arranged at an appropriate position of the end of the first transverse axis 20A facing the shell 40, and the first photoelectric device 24 is arranged at the other end away from the shell 40; the second photoelectric device 26 is arranged at the end of the second transverse axis 20B away from the shell 40; and the third photoelectric device 44 is fixedly arranged together at the ends of the first transverse axis 20A and the second transverse axis 20B facing the shell 40 respectively.

The second bracket 14B is also provided with a second motor 34, and the driving shaft of the second motor 34 is provided with a second active wheel 36. The second active wheel 36 and the second passive wheel 22 are connected by a second belt 38, that is, the second motor 34 can drive the first transverse shaft 20A to rotate through the second active wheel 36, the second belt 38 and the second passive wheel 22. In a preferred embodiment of the present invention, the first active wheel 30 and the second active wheel 36 can both be timing belt pulleys, and the first belt 32 and the second belt 38 can both be timing belts, so that the first active wheel 30 drives the first passive wheel 18 through the first belt 32 and the second active wheel 36 drives the second passive wheel 22 through the second belt 38 more accurately and surely.

The transmission mechanism of the first embodiment can control the first optoelectronic device 24, the second optoelectronic device 26 and the third optoelectronic device 44 to rotate synchronously in the horizontal direction and/or the vertical direction (pitch and elevation direction). The operation method is as follows: when the first motor 28 is activated, the first active wheel 30 drives the first passive wheel 18 to rotate through the first belt 32. At this time, since the fixed base 10 is fixed on a structure such as a building, the first passive wheel 18 will drive the base 12 to rotate, so that the housing 40 arranged on the base 12 and the first photoelectric device 24 arranged on the first transverse axis 20A, the second photoelectric device 26 arranged on the second transverse axis 20B, and the third photoelectric device 44 arranged on the first transverse axis 20A and the second transverse axis 20B rotate synchronously in the horizontal direction, so as to adjust the monitoring angle in the horizontal direction. Furthermore, when the second motor 34 is activated, the second driven wheel 36 drives the second passive wheel 22 to rotate through the second belt 38. At this time, the first photoelectric device 24 arranged on the first transverse axis 20A, the second photoelectric device 26 arranged on the second transverse axis 20B, and the third photoelectric device 44 arranged between the first transverse axis 20A and the second transverse axis 20B rotate synchronously with the first transverse axis 20A in the vertical direction (pitch and elevation directions) to adjust the monitoring angle in the pitch and elevation directions.

"Second Embodiment"

The second embodiment of the present invention is a variation of the structure of the first embodiment. As shown in FIG6 , the housing of the monitor device shown in FIG1 is separated to show the structure of the second embodiment of the present invention; FIG7 is a three-dimensional view of the transmission mechanism of the second embodiment of the present invention after the first and second optoelectronic devices and the housing are removed and the third optoelectronic device is separated; FIG8 is a three-dimensional view of the transmission mechanism of the second embodiment of the present invention from a second angle; and FIG9 is a three-dimensional view of the transmission mechanism of the second embodiment of the present invention from a third angle.

As shown in FIGS. 6 to 9 , the monitor transmission mechanism for synchronously driving three optoelectronic devices provided by the present invention, in a second embodiment, comprises a fixing seat 10 and a base 12, the base 12 being rotatably arranged on the fixing seat 10, and a first bracket 14A and a second bracket 14B being arranged on the base 12. The fixing seat 10 and the base 12 are connected by a longitudinal shaft 16, and a first passive wheel 18 is fixedly arranged on the longitudinal shaft 16. A first motor 28 is axially arranged on the first bracket 14A, and a first active wheel 30 is arranged on the driving shaft of the first motor 28, and the first active wheel 30 and the first passive wheel 18 are connected by a first belt 32. A second motor 34 is transversely disposed on the second bracket 14B, and a second driving wheel 36 is disposed on the driving shaft of the second motor 34 . The housing 40 serves as the outer shell of the monitor, and a receiving space is formed at the first end thereof, and a notch 402 is formed at the opposite second end. The opposite side walls 401 of the notch 402 are respectively provided with shaft holes 403, and the first transverse shaft 20A and the second transverse shaft 20B are rotatably arranged in cooperation with bearings in each shaft hole 403, that is, the first transverse shaft 20A and the second transverse shaft 20B are respectively passed through the two sides of each side wall 401; wherein, the second passive wheel 22 is fixedly arranged on the first transverse shaft 20A, and the second passive wheel 22 and the second active wheel 36 are connected by a second belt 38.

An idler gear set 42 is also disposed on the base 12. The driving shaft of the second motor 34 is provided with a second active wheel 36. The idler gear set 42 includes a gear seat 423 and a first idler gear 421 and a second idler gear 422 coaxially disposed on the gear seat 423. The first idler gear 421 engages with the second active wheel 36. The second idler gear 422 and the second driven wheel 22 are connected by a second belt 38. In a preferred embodiment of the present invention, the first driving wheel 30 and the second idler gear 422 can both be timing pulleys, and the first belt 32 and the second belt 38 can both be timing belts, thereby making it more precise and accurate for the first driving wheel 30 to drive the first passive wheel 18 through the first belt 32 and the second idler gear 422 to drive the second passive wheel 22 through the second belt 38.

The transmission mechanism of the first embodiment can control the first optoelectronic device 24, the second optoelectronic device 26 and the third optoelectronic device 44 to rotate synchronously in the horizontal direction and/or the vertical direction (pitch and elevation direction). The operation method is as follows: when the first motor 28 is activated, the first active wheel 30 drives the first passive wheel 18 to rotate through the first belt 32. At this time, since the fixed base 10 is fixed on a structure such as a building, the first passive wheel 18 will drive the base 12 to rotate, so that the housing 40 arranged on the base 12 and the first photoelectric device 24 arranged on the first transverse axis 20A, the second photoelectric device 26 arranged on the second transverse axis 20B, and the third photoelectric device 44 arranged on the first transverse axis 20A and the second transverse axis 20B rotate synchronously in the horizontal direction, so as to adjust the monitoring angle in the horizontal direction. Furthermore, when the second motor 34 is activated, the second active wheel 36 drives the first idler gear 421 and the second idler gear 422 to rotate simultaneously, and the second idler gear 422 drives the second passive wheel 22 to rotate through the second belt 38. At this time, the first photoelectric device 24 arranged on the first transverse axis 20A, the second photoelectric device 26 arranged on the second transverse axis 20B, and the third photoelectric device 44 arranged between the first transverse axis 20A and the second transverse axis 20B rotate synchronously with the first transverse axis 20A in the vertical direction (pitch and elevation directions) to adjust the monitoring angle in the pitch and elevation directions.

In summary, the present invention integrates the transmission mechanism into the base 12 and accommodates it in the housing 40, which not only reduces the overall volume and simplifies the structure to make the whole present a simple and compact effect, but also can simultaneously control the three optoelectronic devices to rotate in the horizontal and vertical directions to obtain a better and more efficient monitoring effect.

The above is only used to explain the preferred embodiments of the present invention, and is not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention under the same spirit of the invention should still be included in the scope of protection of the present invention.

10: Fixed seat 12: Base 14A: First bracket 14B: Second bracket 16: Longitudinal axis 18: First passive wheel 20A: First transverse axis 20B: Second transverse axis 22: Second passive wheel 24: First optoelectronic device 26: Second optoelectronic device 28: First motor 30: First active wheel 32: First belt 34: Second motor 36: Second active wheel 38: Second belt 40: Housing 401: Side wall 402: Notch 403: Shaft hole 42: Idle gear set 421: First idle gear 422: Second idle gear 423: Gear seat 44: Third optoelectronic equipment 441: Lens

Figure 1 is a three-dimensional external view of the present invention; Figure 2 is a three-dimensional view showing the structure of the first embodiment after the housing shown in Figure 1 is removed; Figure 3 is a three-dimensional view showing the transmission mechanism of the first embodiment after the first and second optoelectronic devices and the housing shown in Figure 2 are removed; Figure 4 is a three-dimensional view showing the transmission mechanism of the first embodiment of the present invention from a second angle; Figure 5 is a three-dimensional view showing the transmission mechanism of the first embodiment of the present invention from a third angle; Figure 6 is a three-dimensional view showing the structure of the second embodiment after the housing shown in Figure 1 is removed; Figure 7 is a three-dimensional view showing the transmission mechanism of the second embodiment after the first and second optoelectronic devices and the housing of the present invention are removed, and the third optoelectronic device is separated; FIG8 is a three-dimensional diagram showing the transmission mechanism of the second embodiment of the present invention from a second angle; and FIG9 is a three-dimensional diagram showing the transmission mechanism of the second embodiment of the present invention from a third angle.

10: Fixed seat 12: Base 20A: First transverse axis 20B: Second transverse axis 22: Second passive wheel 24: First optoelectronic device 26: Second optoelectronic device 28: First motor 30: First active wheel 34: Second motor 36: Second active wheel 38: Second belt 40: Housing 401: Side wall 402: Notch 403: Shaft hole 44: Third optoelectronic device

Claims (4)

A monitor transmission mechanism for synchronously driving three optoelectronic devices comprises: A housing, a first end of which is formed with a receiving space, and a second end thereof is formed with a notch; A fixing seat, which is fixed to a structure; A base, which is rotatably arranged on the fixing seat and assembled to the first end of the housing to cover the receiving space, and a first bracket and a second bracket are arranged on the base; A longitudinal shaft, which connects the fixing seat and the base, so that the base can rotate relative to the fixing seat, and the longitudinal shaft is fixedly provided with a first passive wheel; A first transverse axis and a second transverse axis are rotatably disposed on two opposite side walls of the recess of the housing, respectively, the first transverse axis is fixedly provided with a second passive wheel, the opposite ends of the first transverse axis and the second transverse axis are respectively connected to a first photoelectric device and a second photoelectric device, and a third photoelectric device is disposed between the other ends of the first transverse axis and the second transverse axis; A first motor is fixedly disposed on the first bracket, the first motor is provided with a first active wheel, and the first active wheel and the first passive wheel are connected by a first belt; and A second motor is fixedly disposed on the second bracket, the second motor is provided with a second active wheel, and the second active wheel and the second passive wheel are connected by a second belt; The first motor drives the first passive wheel through the first active wheel and the first belt to rotate the base relative to the fixed base, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the horizontal direction, and the second motor drives the second passive wheel through the second active wheel and the second belt to rotate the first transverse axis and the second transverse axis, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the vertical direction. A monitor transmission mechanism for synchronously driving three optoelectronic devices as described in claim 1, wherein the first active drive wheel and the second active drive wheel are both timing pulleys, and the first belt and the second belt are both timing belts. A monitor transmission mechanism for synchronously driving three optoelectronic devices comprises: A housing, a first end of which is formed with a receiving space, and a second end thereof is formed with a notch; A fixing seat, which is fixed to a structure; A base, which is rotatably arranged on the fixing seat and assembled to the first end of the housing to cover the receiving space, and a first bracket and a second bracket are arranged on the base; A longitudinal shaft, which connects the fixing seat and the base, so that the base can rotate relative to the fixing seat, and the longitudinal shaft is fixedly provided with a first passive wheel; A first transverse axis and a second transverse axis are rotatably disposed on two opposite side walls of the recess of the housing, respectively; a second passive wheel is fixedly disposed on the first transverse axis; opposite ends of the first transverse axis and the second transverse axis are respectively connected to a first photoelectric device and a second photoelectric device, and a third photoelectric device is disposed between the other ends of the first transverse axis and the second transverse axis; A first motor is fixedly disposed on the first bracket, the first motor is provided with a first active wheel, and the first active wheel and the first passive wheel are connected by a first belt; A second motor is fixedly disposed on the second bracket, the second motor is provided with a second active wheel; and An idler gear set is arranged on the base, the idler gear set includes a first idler gear and a second idler gear, the first idler gear engages the second active gear, and the second idler gear and the second passive gear are connected by a second belt; wherein the first motor drives the first passive gear through the first active gear and the first belt, so that the base rotates relative to the fixed seat, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the horizontal direction, and wherein the second motor drives the idler gear set through the second active gear, and further drives the second passive gear through the second belt to rotate the second transverse axis, thereby synchronously controlling the first optoelectronic device, the second optoelectronic device and the third optoelectronic device to rotate in the vertical direction. A monitor transmission mechanism for synchronously driving three optoelectronic devices as described in claim 3, wherein the first driving wheel and the second idler gear are both timing belt pulleys, and the first belt and the second belt are both timing belts.