Electronic endoscope

Abstract

The utility model belongs to the technical field of endoscopes, and particularly provides an electronic endoscope which comprises a relay plate, a lens assembly and a connector plug, the lens assembly is electrically connected with the relay plate through a first cable, the relay plate is electrically connected with the connector plug through a second cable, and the relay plate is further provided with a power circuit and a clock circuit. In addition, the relay plate is also provided with a high-voltage-resistant electrostatic device, two common-mode filters and two terminating impedance matching resistors. According to the scheme, the FPC and the transmission cable are shielded, so that the anti-interference capability is higher, and the signal quality can be improved; according to the scheme, the relay plate is matched with the BTB connector for cable connection, plugging and unplugging are convenient, dismounting, maintenance and debugging are facilitated, and the relay plate is additionally provided with the high-voltage-resistant electrostatic device, the common-mode filter and the terminating impedance matching resistor, so that the high-voltage-resistant performance of the product is effectively improved; after the scheme is improved, the cost of the endoscope is not obviously increased, and mass production and popularization are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to endoscope technical field, especially provide electronic endoscope. BACKGROUND

[0002] Medical endoscope is a kind of endoscope tool for clinical diagnosis, treatment and human microtrauma operation. Image can be obtained directly through natural cavity of human body or small incision of operation, and endoscope is introduced into organ to check. According to the transmission principle, medical endoscope is divided into optical endoscope and electronic endoscope, and the utility model only aims at electronic endoscope.

[0003] Electronic endoscope passes through the CCD or CMOS of front end as image sensor, and light signal is converted into electric signal, then passes through a section of transmission line to the image processor of main control and is handled, and main control is shown on monitor in image picture.

[0004] Electronic endoscope system is mainly composed of light source, image processor, signal transmission line, main control end, monitor and related accessories. Electronic endoscope can carry out magnification processing to image to facilitate observation detail, facilitate image data saving and post-processing, and electronic endoscope is smaller in outer diameter, and image display is clear, and illumination brightness is stronger.

[0005] Traditional disposable electronic endoscope adopts FPC and ordinary wire, and the signal fed back by image sensor is high-speed signal. High-speed signal is susceptible to external environment interference, and ordinary wire is weak in anti-interference ability, finally leading to unstable image quality on terminal equipment. And converting high-speed signal into signal not susceptible to interference for transmission, for disposable endoscope, the cost increase is too large, and it is difficult to promote and apply in a large range. UTILITY MODEL CONTENT

[0006] To solve the above technical problems, the utility model adopts the technical scheme of electronic endoscope, including relay board, lens assembly and connector plug, the lens assembly is electrically connected with the relay board through the first cable, and the relay board is electrically connected with the connector plug through the second cable.

[0007] The first cable is electrically connected with the relay board through BTB connector, and the relay board is provided with connector circuit.

[0008] The lens assembly includes FPC and lens shell, the lens shell is built-in image sensor, the FPC is assembled in the rear portion of the inner cavity of the lens shell, the image sensor is electrically connected with the FPC, and the two ends of the first cable are electrically connected with the relay board and the FPC respectively.

[0009] The relay board is also provided with power supply circuit and clock circuit.

[0010] Further, the power supply circuit adopts three LDO chips.

[0011] Further, the clock circuit adopts a clock chip.

[0012] Further, the relay board is further provided with a high-voltage static electricity resistor and two common-mode filters.

[0013] Further, the relay board is further provided with two termination impedance matching resistors.

[0014] Further, the first cable is composed of a transmission line and a steel pipe, and the steel pipe is sleeved outside the transmission line.

[0015] Further, the lens assembly further comprises a lens lens and an LED, the lens lens and the LED are fixedly installed in the front of the inner cavity of the lens shell, the image sensor is located between the lens lens and the FPC, and the LED is electrically connected with the image sensor.

[0016] Further, the transmission line is composed of six electronic wires and six coaxial wires, and an insulating layer is wrapped outside the transmission line.

[0017] The coaxial wire is wrapped with a shielding layer outside.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The FPC and the transmission cable are shielded, so that the anti-interference ability is stronger, and the signal quality is improved.

[0020] 2. The cable is connected through the relay board and the BTB connector, so that the plug-in and pull-out are convenient, and the product is convenient to disassemble, maintain and debug, and the high-voltage static electricity resistor, the common-mode filter and the termination impedance matching resistor are additionally arranged on the relay board, so that the high-voltage resistance of the product is effectively improved.

[0021] 3. After the improvement, the cost of the endoscope does not increase obviously, and the endoscope is convenient to mass produce and popularize. DRAWINGS

[0022] Figure 1 It is a structural schematic view of the utility model;

[0023] Figure 2 It is a structural schematic view of the utility model; Figure 1 It is an enlarged view of the middle a;

[0024] Figure 3 It is a structural schematic view of the lens assembly of the utility model;

[0025] Figure 4 It is a power supply circuit diagram of the relay board of the utility model;

[0026] Figure 5 It is a clock circuit diagram of the relay board of the utility model;

[0027] Figure 6 The high-speed signal circuit diagram of the relay board in the utility model;

[0028] Figure 7 The control signal circuit diagram of the relay board in the utility model;

[0029] Figure 8 The connector circuit diagram of the relay board in the utility model;

[0030] The reference signs include: 1, BTB connector; 2, first cable; 3, welding point; 4, coaxial line; 5, grounding welding; 6, relay board; 7, lens assembly; 8, second cable; 9, transmission line; 10, FPC; 11, lens housing; 12, lens lens; 13, LED; 14, connector plug. DETAILED DESCRIPTION

[0031] The utility model is described in detail below in combination with the drawings.

[0032] Referring to Figures 1-3 , the electronic endoscope includes a relay board 6, a lens assembly 7 and a connector plug 14, the lens assembly 7 is electrically connected with the relay board 6 through the first cable 2, and the relay board 6 is electrically connected with the connector plug 14 through the second cable 8;

[0033] The first cable 2 is electrically connected with the relay board 6 through the BTB connector 1, and the relay board 6 is provided with a connector circuit;

[0034] Referring to Figure 8 , the system of the connector circuit is matched with the BTB connector.

[0035] The BTB connector 1 is convenient to plug and unplug, and the use of the BTB connector 1 can provide convenience for the assembly test and maintenance of the equipment.

[0036] The lens assembly 7 includes an FPC 10 and a lens housing 11, the lens housing 11 is internally provided with an image sensor, the FPC 10 is assembled at the rear part of the inner cavity of the lens housing 11, the image sensor is electrically connected with the FPC 10, and the two ends of the first cable 2 are respectively electrically connected with the BTB connector 1 and the FPC 10.

[0037] The lens assembly 7 further includes a lens lens 12 and an LED 13, the lens lens 12 and the LED 13 are fixedly installed at the front part of the inner cavity of the lens housing 11, the image sensor is located between the lens lens 12 and the FPC 10, and the LED 13 is electrically connected with the image sensor.

[0038] The first cable 2 is composed of a transmission line 9 and a steel pipe, and the steel pipe is sleeved on the outside of the transmission line 9.

[0039] Specifically, the transmission line 9 is composed of six electronic lines and six coaxial lines 4, and the outer part of the transmission line 9 is wrapped with an insulating layer;

[0040] The outer part of the coaxial line 4 is wrapped with a shielding layer.

[0041] Both the BTB connector 1 and the FPC 10 are provided with six transmission line welding points and one shielding pad, the six transmission line welding points are welded with the six coaxial lines 4 respectively, and the shielding layer is welded with the shielding pad.

[0042] The shielding layer can make the coaxial line 4 have stronger anti-interference ability and improve the signal transmission quality.

[0043] The insulating layer can make the transmission line 9 have better insulation and high-voltage resistance.

[0044] The relay board 6 is provided with a filter voltage-resistant circuit, and the signal is transmitted to the remote control board after being processed by the filter voltage-resistant circuit.

[0045] The core of the second cable 8 is a twisted pair structure, and the outer part is wrapped with a shielding layer made of metal woven mesh material.

[0046] Referring to Figure 4 , the relay board 6 is provided with a power supply circuit, and three LDO chips are used in the power supply circuit, the input voltage of the three LDO chips is 3.3V or 5V, and the output voltage of the three LDO chips is 2.8V, 1.8V and 1.2V respectively.

[0047] The three LDO chips are U1, U2 and U3 respectively.

[0048] Referring to Figure 5 , the relay board 6 is provided with a clock circuit, and a clock chip is used in the clock circuit.

[0049] Referring to Figure 6 , the relay board 6 is provided with one high-voltage static electricity resistor and two common-mode filters, and the common-mode interference and high-voltage static electricity interference in the data signal are filtered out during transmission.

[0050] Among them, the two common-mode filters are D2 and D3 respectively, the high-voltage static electricity resistor is D1, and the output pins of D2 and D3 are connected with the I / O pins of D1.

[0051] Referring to Figure 7 , the relay board 6 is provided with two termination impedance matching resistors to further improve the signal quality.

[0052] The two termination impedance matching resistors are R1 and R2 respectively.

[0053] The above merely describes preferred embodiments of the present application, and for ordinary skilled people in the art, many changes can be made in the specific embodiments and application ranges according to the present application, as long as the changes do not depart from the concept of the present application, and all belong to the protection scope of the present application.

Claims

1. An electronic endoscope, characterized by: The relay board, the lens assembly and the connector plug are included, the lens assembly is electrically connected with the relay board through the first cable, and the relay board is electrically connected with the connector plug through the second cable; The first cable is electrically connected with the relay board through a BTB connector, and a connector circuit is arranged on the relay board; The lens assembly includes an FPC and a lens housing, an image sensor is built in the lens housing, the FPC is assembled at the rear of the inner cavity of the lens housing, the image sensor is electrically connected with the FPC, and the two ends of the first cable are respectively electrically connected with the relay board and the FPC; A power supply circuit and a clock circuit are further arranged on the relay board.

2. The electronic endoscope as set forth in claim 1, characterized by: The power supply circuit adopts three LDO chips.

3. The electronic endoscope as claimed in claim 1, characterized by: The clock circuit adopts a clock chip.

4. The electronic endoscope as set forth in claim 1, characterized by: An anti-high-voltage static device and two common-mode filters are further arranged on the relay board.

5. The electronic endoscope as set forth in claim 1, characterized by: Two termination impedance matching resistors are further arranged on the relay board.

6. The electronic endoscope as set forth in claim 1, characterized by: The first cable is composed of a transmission line and a steel pipe, and the steel pipe is sleeved outside the transmission line.

7. The electronic endoscope as set forth in claim 1, characterized by: The lens assembly further includes a lens lens and an LED, the lens lens and the LED are fixedly installed at the front of the inner cavity of the lens housing, the image sensor is located between the lens lens and the FPC, and the LED is electrically connected with the image sensor.

8. The electronic endoscope as claimed in claim 6, characterized by: The transmission line is composed of six electronic wires and six coaxial lines, and the transmission line is wrapped with an insulating layer outside. The coaxial line is wrapped with a shielding layer outside.

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