CN219435597U

CN219435597U - Endoscope transmission cable device capable of simultaneously transmitting high-speed signals and low-speed signals

Info

Publication number: CN219435597U
Application number: CN202320830828.4U
Authority: CN
Inventors: 任智强; 郑春雨
Original assignee: Jiangsu Wuyou Microinvasive Medical Technology Co ltd
Current assignee: Jiangsu Wuyou Microinvasive Medical Technology Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-07-28
Anticipated expiration: 2033-04-14

Abstract

An endoscope transmission cable device for simultaneously transmitting high-speed and low-speed signals comprises a transmission cable, a low-speed electronic wire connector, a high-speed coaxial wire connector and a low-speed signal coupling and separating circuit; the low-speed signal coupling and separating circuit is connected with the handle end and the host end of the endoscope, the low-speed signal coupling and separating circuits at the two ends are connected by a transmission cable, and the low-speed electronic wire connector and the high-speed coaxial wire connector are arranged on the low-speed signal coupling and separating circuit and are respectively connected with the transmission cable. The device uses the minimum quantity of transmission lines to finish the transmission of high-speed and low-speed signals required by communication according to different channel bandwidths of transmission media occupied by different transmission signals, greatly reduces the processing cost and processing difficulty of the transmission cable, effectively improves the diameter of the cable because of the reduction of cable bundles, and improves the softness of the cable.

Description

Endoscope transmission cable device capable of simultaneously transmitting high-speed signals and low-speed signals

Technical Field

The utility model relates to the field of endoscope devices, in particular to an endoscope transmission cable device for simultaneously transmitting high-speed signals and low-speed signals.

Background

In the conventional endoscope handle cable design, as shown in fig. 1 and 6 (in fig. 1, RF1.13 32awg 10c refers to 10 coaxial cables of RF1.13 AWG, 32awg 5c refers to 5 wires of 32AWG specification, 26awg 1c refers to 1 wire of 26AWG specification, AL refers to aluminum foil, grid refers to a woven mesh, non-woven fabric, TPU is thermoplastic polyurethane), in order to transmit 4K high definition images, 3-5 pairs of differential signals, that is, 6-10 shielded coaxial harnesses are generally required to transmit high-speed digital signals (the speed is generally 3Gbps or more), meanwhile, a power supply (direct current signals), a key signal (low frequency signal) on the handle, an upgrade control signal (commonly referred to as SPI (low frequency signal)) of the handle, etc., the conventional technology mostly adopts a composite structure cable formed by twisting a coaxial harness and a common electronic harness similar to that shown in the following figures to satisfy simultaneous transmission of high-speed signals and low-speed signals. The problem that the processing cost is higher, the processing time is longer, the cable diameter is thicker exists, and the processing difficulty is higher in the processing handle line of cable processing for later stage, and the processing yield is lower also exists.

Disclosure of Invention

The utility model provides an endoscope transmission cable device for simultaneously transmitting high-speed signals and low-speed signals, aiming at the problems in the background art, and the problems that the total types of cables in the cable are more and the diameters of the cables are thicker caused when the handle cable of the endoscope simultaneously transmits high-frequency signals and low-frequency signals such as digital image signals, control signals, key signals and the like can be solved.

An endoscope transmission cable device for simultaneously transmitting high-speed and low-speed signals comprises a transmission cable, a low-speed electronic wire connector, a high-speed coaxial wire connector and a low-speed signal coupling and separating circuit;

the low-speed signal coupling and separating circuit is connected with the handle end and the host end of the endoscope, the low-speed signal coupling and separating circuits at the two ends are connected by a transmission cable, and the low-speed electronic wire connector and the high-speed coaxial wire connector are arranged on the low-speed signal coupling and separating circuit and are respectively connected with the transmission cable.

Further, the low-speed signal coupling and separating circuit comprises an LC low-pass filter circuit and a data interface.

Further, the data interface comprises J2, J4, J6, J8, J10; the J2, J4 and J6 interfaces comprise two paths of connection, one path of connection is connected with the transmission cable through the LC low-pass filter circuit, and the other path of connection is directly connected with the transmission cable; the J8 and J10 interfaces are directly connected with the transmission cable.

Further, the data interfaces are all grounded.

Further, the transmission cable is composed of 10 coaxial cables and an outer shield layer.

Further, the high-speed coaxial cable connector is connected to 10 coaxial cables among the transmission cables.

Further, the low-speed electronic wire connector is connected with 6 coaxial cables among the transmission cables.

Further, the handle end of the endoscope collects high-speed signals of image data through the FPGA.

The beneficial effects achieved by the utility model are as follows: (1) The device uses the minimum number of transmission lines to complete the transmission of high-speed and low-speed signals required by communication according to the difference of the channel bandwidths of transmission media occupied by different transmission signals; (2) The processing cost and the processing difficulty of the transmission cable are reduced; (3) Because the used cable wire bundles are reduced, the diameter of the cable is effectively improved, and the softness of the cable is improved.

Drawings

Fig. 1 is a diagram of a conventional design of an endoscope handle cable in the background of the utility model.

FIG. 2 is a schematic view of an endoscope transmission cable device according to an embodiment of the present utility model

Fig. 3 is a schematic view of high-speed signal acquisition at the handle end of an endoscope in an embodiment of the present utility model.

Fig. 4 is a schematic diagram of low-speed signal acquisition at the handle end of an endoscope in an embodiment of the present utility model.

Fig. 5 is a block diagram of a low-speed signal coupling/separating circuit according to an embodiment of the present utility model.

Fig. 6 is a schematic view of the connection of endoscope handle cables in the background of the utility model.

Fig. 7 is a schematic view showing connection of an endoscope transmission cable device in the embodiment of the present utility model.

In the figure, 1-low speed electronics connectors, 2-circuit boards, 3-high speed coaxial connectors.

Detailed Description

The technical scheme of the utility model is further described in detail below with reference to the attached drawings.

Referring to fig. 2, wherein:

the high-speed data acquisition end is mainly responsible for acquiring image data and transmitting the image data to the endoscope host at a speed of more than 1Gbps, simultaneously transmitting low-speed signals such as keys and the like to the host, feeding back the operation actions of a user to the endoscope host, simultaneously being controlled by the endoscope host by adopting a low-speed bus protocol (such as SPI protocol), and simultaneously receiving the direct current power supply of the endoscope host.

The endoscope host, namely a receiving end of the high-speed signal, is mainly responsible for processing high-speed image data of the endoscope handle, operation behaviors of users such as keys and the like, and simultaneously uses a low-speed bus protocol (commonly known as SPI protocol) to control the endoscope handle, and simultaneously provides a direct-current power supply for the handle.

The coupling and separating circuit of low-frequency signals (the coupling and separating circuit in figure 2 is directly arranged at the two ends of the handle and the host of the endoscope, and then the coupling and separating circuits at the two ends are connected through the improved transmission cable), the coupling and separating circuit is mainly responsible for coupling low-speed communication signals such as keys/control/power supply and the like onto the shielding coaxial cable, and is also responsible for separating low-speed communication signals such as keys/control/power supply and the like from the coaxial cable, and the coupling circuit and the separating circuit do not have great influence on high-speed signals.

The transmission cable, i.e. all channels for data transmission, is internally composed of shielded coaxial cables, several meters in length.

The high-speed signal acquisition end of the endoscope handle acquires image data by the FPGA, as shown in fig. 3-4, the high-speed image data and the low-speed control signal are sent to the high-speed connector together, the high-speed connector transfers the signal to one end circuit board of the cable, and then the signal is welded to the cable and transmitted to the endoscope host.

As shown in fig. 5, the low-frequency signal coupling and separating circuit is used for connecting two ends of a cable (the two ends of the cable are respectively connected with a handle and a host machine), the cable is welded to positions J2, J4, J6, J8 and J10 in the circuit, each position is provided with two bonding pads, and two differential coaxial wires are welded. In fig. 7, J2 to J10 are signal welding positions, corresponding to the dot positions in fig. 7, and are mainly used for welding cables, in fig. 5, the upper left part is a high-speed connector, corresponding to the high-speed coaxial connector in fig. 7, the upper right part is not a low-speed connector, corresponding to the low-speed electronic connector in fig. 7, and two connectors above fig. 5 are mainly parts of one end of a handle for being in butt joint with a connector in a host, namely, the host transmits high-speed signals and low-speed signals to one end of the handle through the two connectors, and the low-speed part is coupled to the other end of the handle together through a coupling circuit and then separated.

As shown in fig. 5, since the low-speed signal frequency of the key/control/power supply is not higher than 50MHz, the high-speed data signal frequency is not lower than 1GHz, the low-speed signal coupling and separating circuit uses an LC low-pass filter circuit, and according to the LC low-pass filter circuit (in fig. 5, J2J4J6 is connected to the low-pass circuit, J8 and J10 are not connected because J2J4J6 can couple 6 low-frequency signals into high-frequency signals, most applications are satisfied, the connector is also a high-speed connector, and J8 and J10 can be also connected to the coupling circuit according to the requirement in design) the cut-off frequency formula:

where l=180 nh, c=10 pF, the cut-off frequency f=118 MHz is calculated.

The LC low-pass filter circuit has small attenuation for low-speed signals such as keys/control/power supply below 50MHz, and can effectively attenuate signals above 1GHz, thereby realizing a transmission line design capable of simultaneously transmitting high-speed signals and low-speed signals.

The low-speed signal coupling and separating circuit realizes the transmission of 10 high-speed signals between the high-speed signal acquisition end of the endoscope handle and the high-speed data receiving end of the endoscope host and six other signals such as SPI, control and power supply under the condition that only 10 differential signals are welded.

In general, the above 6 SPI, control, power signal requires six separate electric wires to transmit signals, as shown in fig. 6, and 10 coaxial cables to transmit high-speed signals and 6 electric wires to transmit low-speed signals to complete the above 16 high-speed and low-speed signal transmission, and a shielding layer is additionally provided, so that the diameter of the final cable is about 7.5mm, the wire is thicker, and the flexibility is poor. The welding process is also complex, 16 signals of the cable are required to be welded to the circuit board and then connected to other components through the connector, and the whole cable can be machined only by welding 10+6 wires, so that the method is time-consuming and labor-consuming and is easy to make mistakes.

After the device uses the circuit, the low-speed signal is coupled to the high-speed cable for transmission, the number of wire harnesses and the processing difficulty of the cable are obviously reduced, and the design, the flexibility and the cost of the wire harnesses are greatly improved.

As shown in fig. 7, the optimized transmission cable can complete the transmission of high-speed and low-speed signals by using only 10 coaxial lines, and the cable processing, the welding with other components and the like are greatly optimized.

In fig. 7, signal transmission lines such as a key, an SPI upgrade signal, a power lamp low frequency signal, etc. may be provided on an input line of the low speed connector.

The cable can optimize and reduce six cables, and the diameter can optimize to 6mm, and the compliance is strengthened, and cable and other part welding point positions reduce to 10 from 16, and to a great extent reduces welding work load and error probability.

The above description is merely of preferred embodiments of the present utility model, and the scope of the present utility model is not limited to the above embodiments, but all equivalent modifications or variations according to the present disclosure will be within the scope of the claims.

Claims

1. An endoscope transmission cable device for simultaneously transmitting high-speed signals and low-speed signals, which is characterized in that:

the device comprises a transmission cable, a low-speed electronic wire connector, a high-speed coaxial wire connector and a low-speed signal coupling and separating circuit;

2. An endoscope transmission cable device for simultaneously transmitting high-speed and low-speed signals according to claim 1, wherein: the low-speed signal coupling and separating circuit comprises an LC low-pass filter circuit and a data interface.

3. An endoscope transmission cable device for simultaneously transmitting high-speed and low-speed signals according to claim 2, wherein: the data interface comprises J2, J4, J6, J8 and J10; the J2, J4 and J6 interfaces comprise two paths of connection, one path of connection is connected with the transmission cable through the LC low-pass filter circuit, and the other path of connection is directly connected with the transmission cable; the J8 and J10 interfaces are directly connected with the transmission cable.

4. An endoscope transmission cable apparatus for simultaneously transmitting high-speed and low-speed signals according to claim 3, wherein: the data interfaces are all grounded.

5. An endoscope transmission cable device for simultaneously transmitting high-speed and low-speed signals according to claim 1, wherein: the transmission cable consists of 10 coaxial cables and an outer shield.

6. An endoscope transmission cable apparatus for simultaneously transmitting high-speed and low-speed signals according to claim 5, wherein: the high-speed coaxial cable connector is connected to 10 coaxial cables among the transmission cables.

7. An endoscope transmission cable apparatus for simultaneously transmitting high-speed and low-speed signals according to claim 5, wherein: the low-speed electronic wire connector is connected with 6 coaxial cables among the transmission cables.

8. An endoscope transmission cable device for simultaneously transmitting high-speed and low-speed signals according to claim 1, wherein: the handle end of the endoscope collects high-speed signals of image data through the FPGA.