CN209899345U

CN209899345U - Automatic zooming oral cavity observer based on MEMS mechanism

Info

Publication number: CN209899345U
Application number: CN201920294618.1U
Authority: CN
Inventors: 韩愚
Original assignee: SHANGHAI HANDI MEDICAL EQUIPMENT Co Ltd
Current assignee: SHANGHAI HANDI MEDICAL EQUIPMENT Co Ltd
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2020-01-07
Anticipated expiration: 2029-03-08

Abstract

The utility model discloses an automatic zoom oral cavity visualizer based on MEMS mechanism. It comprises a camera shooting handle; the front end of the handle is provided with a lens base, the front end of the lens base is provided with a focus fixing lens, and an MEMS mechanism is arranged in the lens base; the MEMS mechanism comprises a movable plate, a fixed plate, a movable electrode, a fixed electrode, a silicon circuit board, an upper glass circuit board and a lower glass circuit board; an external voltage is arranged between the movable electrode and the fixed electrode; the focus fixing lens is fixedly arranged on a movable plate at the front end of the MEMS mechanism; a CMOS image sensor is fixedly arranged on a rear end fixing plate of the MEMS mechanism; the camera shooting handle is internally provided with a PCB circuit board, and the focusing lens is connected with an ISP image processing chip on the PCB circuit board through an MEMS mechanism and a CMOS image sensor. Compared with a VCM zoom lens, the automatic zooming oral cavity observer based on the MEMS mechanism has the advantages of longer adjustable stroke, higher focusing speed, thinness and optical anti-shake function.

Description

Automatic zooming oral cavity observer based on MEMS mechanism

Technical Field

The utility model belongs to the technical field of medical instrument, a automatic zoom oral cavity visualizer based on MEMS mechanism is related to.

Background

The digital oral cavity observation instrument (oral cavity endoscope) is used for local photography, examination, diagnosis and the like of the oral cavity, and brings brand new operation convenience and comfort to dentists and patients. The camera shooting device is provided with a camera shooting handle with the largest visual angle, and a smooth and small handle head at the front end of the camera shooting handle can easily go deep into the oral cavity of a patient to help detect decayed teeth at an occlusal part or an adjacent surface in the oral cavity of the patient and even decay teeth at an initial stage ignored by X-rays.

The digital oral cavity observation instrument is internally provided with a double-key image capturing button, the imaging of the digital oral cavity observation instrument is realized by a CMOS image sensor, the digital oral cavity observation instrument is generally provided with a USB interface, only any computer with the USB interface is connected with the digital oral cavity observation instrument, the proper angle (of the part to be shot) is found by using the full dynamic image searching function of an endoscope, and then the image capturing button is pressed, so that an ideal image can be obtained, and the maximum effective pixel of 130M can be captured.

The existing digital oral cavity observation instrument is generally provided with a VCM zoom lens at the front end of a camera shooting handle, namely, the VCM zoom lens is generally adopted for automatic zooming and focusing in the prior art, and the automatic zooming and focusing mode adopting the VCM zoom lens has the advantages of low focusing speed, short adjustable stroke, large volume, no optical anti-shake function and great influence of hand shaking on imaging quality during shooting.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a focus speed faster, adjustable stroke is longer, small, have the automatic oral cavity visualizer that zooms based on MEMS mechanism of optics anti-shake function.

The technical scheme of the utility model as follows:

an automatic zooming oral cavity observer based on an MEMS mechanism comprises a camera shooting handle; the front end of the camera shooting handle is provided with a lens base, the front end of the lens base is provided with a focus fixing lens, and an MEMS mechanism is arranged in the lens base; the MEMS mechanism comprises a movable plate, a fixed plate, a movable electrode, a fixed electrode, a silicon circuit board integrated with an electronic circuit, an upper glass circuit board and a lower glass circuit board; the movable electrode is connected with the movable plate and is connected with the upper glass circuit board and the silicon circuit board; the fixed electrode is connected with the fixed plate and connected with the lower glass circuit board and the silicon circuit board; an external voltage is arranged between the movable electrode and the fixed electrode; the fixed-focus lens is fixedly arranged on a movable plate at the front end of the MEMS mechanism; a CMOS image sensor is fixedly arranged on a rear end fixing plate of the MEMS mechanism; the camera shooting handle is internally provided with a PCB circuit board with image acquisition, processing and transmission functions, and the PCB circuit board is provided with an ISP image processing chip; the camera shooting handle is provided with an image capturing button connected with the PCB; the fixed focus lens is connected with the ISP image processing chip on the PCB circuit board through the MEMS mechanism and the CMOS image sensor in sequence.

Furthermore, the oral cavity observation instrument is provided with a USB interface and can be connected with a computer or a display through the USB interface.

Furthermore, the PCB circuit board comprises a CPU central processing unit, an ISP image processing chip and a display output module; the near-focus CMOS image sensor and the far-focus CMOS image sensor are respectively connected with a central processing unit on the PCB circuit board and a signal input port of an ISP image processing chip; the image capturing button is respectively connected with a central processing unit on the PCB circuit board and a signal output port of the ISP image processing chip; and the display output module on the PCB is connected with the display through a USB interface.

Furthermore, an LED lamp is arranged beside the front-end focus fixing lens of the camera shooting handle.

Further, the image capturing button is a double-key image capturing button.

MEMS devices, i.e. micro-electromechanical systems, mainly include micro-mechanical devices (movable and fixed plates), micro-sensors, micro-actuators, and corresponding processing circuits (electronic circuits). It is a general name of equipment which integrates tiny mechanical important parts, micro sensors, electronic circuits and the like on the same silicon circuit board, glass circuit board, organic material and the like, and the main parts of the equipment are manufactured by semiconductor integrated circuit manufacturing technology.

The utility model has the advantages that:

the utility model discloses an automatic zoom oral cavity visualizer based on MEMS mechanism, relative to VCM zoom lens, the adjustable stroke is longer; the focusing speed is higher relative to the VCM zoom lens; the thickness is thinner and the volume is small; can integrate the optical anti-shake function and has the optical anti-shake function.

Drawings

Fig. 1 is a schematic structural diagram of an automatic zoom oral cavity viewer based on an MEMS mechanism according to the present invention;

fig. 2 is a schematic diagram of the structure and principle of the MEMS mechanism of the present invention.

In the figure: 1. the device comprises a fixed focus lens 2, an MEMS mechanism 3, a CMOS image sensor 4, an image capturing button 5, a PCB circuit board 6, an ISP image processing chip 7, a USB interface 8, a movable electrode 9, a fixed electrode 10, a lens base 11, an LED lamp A, a movable plate B, a fixed plate

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Examples

As shown in fig. 1, the utility model relates to an automatic zoom oral cavity observer based on MEMS mechanism, which comprises a camera handle; the front end of the camera shooting handle is provided with a lens base 10, the front end of the lens base 10 is provided with a fixed focus lens 1, and an MEMS mechanism 2 is arranged in the lens base 10.

As shown in fig. 2, the MEMS device 2 includes a movable plate a, a fixed plate B, a movable electrode 8, a fixed electrode 9, and further includes a silicon circuit board integrated with an electronic circuit and upper and lower glass circuit boards (the MEMS device 2 is manufactured by a semiconductor integrated circuit manufacturing technique); the movable electrode 8 is connected with the movable plate a, and is connected with the upper glass circuit board and the silicon circuit board; the fixed electrode 9 is connected with the fixed plate B and connected with the lower glass circuit board and the silicon circuit board; an applied voltage is provided between the movable electrode 8 and the fixed electrode 9.

As shown in fig. 1, a fixed focus lens 1 is fixedly mounted on a front movable plate a of the MEMS mechanism 2, and a CMOS image sensor 3 is fixedly mounted on a rear fixed plate B of the MEMS mechanism 2; a PCB circuit board 5 with image acquisition, processing and transmission functions is arranged in the camera shooting handle, and an ISP image processing chip 6 is arranged on the PCB circuit board 5; the fixed focus lens 1 is connected with an ISP image processing chip 6 on a PCB circuit board 5 through an MEMS mechanism 2 and a CMOS image sensor 3 in sequence; the camera shooting handle is provided with an image capturing button 4 connected with a PCB circuit board 5; the image capture button 4 is connected with an ISP image processing chip 6 on a PCB circuit board 5; the fixed focus lens 1 is connected with an image capture button 4 sequentially through the MEMS mechanism 2, the CMOS image sensor 3 and the PCB circuit board 5.

As shown in fig. 1, an LED lamp 11 is further provided at the front end of the camera handle, near the focus fixing lens 1.

As shown in figure 1, the oral cavity observation instrument is also provided with a USB interface 7, and can be connected with a computer or a display through the USB interface 7.

The PCB circuit board 5 is provided with a CPU central processing unit and a display output module besides an ISP image processing chip 6; the CMOS image sensor 2 is respectively connected with a central processing unit on the PCB circuit board 5 and a signal input port of the ISP image processing chip 6; the image capturing button 4 is respectively connected with a central processing unit on the PCB circuit board 5 and a signal output port of the ISP image processing chip 6; the display output module on the PCB 5 is connected with the display through a USB interface 7.

The image capturing button 4 is a double-key image capturing button. The model number of the ISP image processing chip 6 is FH 8510.

The utility model discloses an automatic zoom oral cavity visualizer based on MEMS mechanism realizes zooming automatically through MEMS mechanism, can reach following function and effect:

1) the camera lens is fixed on one structural component (namely, a movable plate A) in the MEMS mechanism, the CMOS image sensor is fixed on the other structural component (namely, a fixed plate B) in the MEMS mechanism, and the relative positions of the two structural components in the MEMS mechanism, namely, the movable plate A and the fixed plate B can be controlled by controlling voltage, so that zooming is realized.

2) The distance between the movable plate a and the fixed plate B (i.e., the lens stroke) can be made longer with respect to the VCM zoom.

3) In contrast to VCM zooming, MEMS mechanisms directly convert electricity into mechanical motion, allowing for wider and therefore faster focusing speeds.

4) The MEMS mechanism zooms mechanically, so that a lens is not easy to shake; the VCM zooming is realized by converting electricity into a magnetic field and utilizing acting force generated by the magnetic field, and compared with the automatic zooming of an MEMS mechanism, the VCM zooming is easier for a lens to shake.

Claims

1. An automatic zooming oral cavity observer based on an MEMS mechanism is characterized by comprising a camera shooting handle; the front end of the camera shooting handle is provided with a lens base, the front end of the lens base is provided with a focus fixing lens, and an MEMS mechanism is arranged in the lens base; the MEMS mechanism comprises a movable plate, a fixed plate, a movable electrode, a fixed electrode, a silicon circuit board integrated with an electronic circuit, an upper glass circuit board and a lower glass circuit board; the movable electrode is connected with the movable plate and is connected with the upper glass circuit board and the silicon circuit board; the fixed electrode is connected with the fixed plate and connected with the lower glass circuit board and the silicon circuit board; an external voltage is arranged between the movable electrode and the fixed electrode; the fixed-focus lens is fixedly arranged on a movable plate at the front end of the MEMS mechanism; a CMOS image sensor is fixedly arranged on a rear end fixing plate of the MEMS mechanism; the camera shooting handle is internally provided with a PCB circuit board with image acquisition, processing and transmission functions, and the PCB circuit board is provided with an ISP image processing chip; the camera shooting handle is provided with an image capturing button connected with the PCB; the fixed focus lens is connected with the ISP image processing chip on the PCB circuit board through the MEMS mechanism and the CMOS image sensor in sequence.

2. The MEMS mechanism based auto-zoom oral viewer of claim 1, wherein the oral viewer has a USB interface, and is connectable to a computer or a display via the USB interface.

3. The MEMS mechanism based auto-zoom oral viewer of claim 2, wherein the PCB board comprises a CPU, an ISP image processing chip, a display output module; the near-focus CMOS image sensor and the far-focus CMOS image sensor are respectively connected with a central processing unit on the PCB circuit board and a signal input port of an ISP image processing chip; the image capturing button is respectively connected with a central processing unit on the PCB circuit board and a signal output port of the ISP image processing chip; and the display output module on the PCB is connected with the display through a USB interface.

4. The automatic zoom oral cavity viewer based on MEMS mechanism of claim 1 or 2, further comprising an LED lamp near the front focus lens of the camera handle.

5. The MEMS mechanism based auto-zoom oral viewer of claim 1 or claim 2, wherein the image capture button is a two-button image capture button.