Mouse for magnetic resonance, manufacturing method thereof, and signal transmission apparatus containing the same

Abstract

A mouse for magnetic resonance, comprising an upper shell (1), a lower shell (2), a trackball (3), a circuit board (4) and a cable (5), wherein the inner surfaces of the upper shell (1) and the lower shell (2) are coated with a silver and copper conductive paint layer, the concentration of a silver and copper conductive paint being 13% to 17%; and a manufacturing method for the mouse for magnetic resonance, and a signal transmission apparatus are further comprised. The clinical usage of functional magnetic resonance can be satisfied, a signal interference is avoided, and it is ensured that a remote computer accurately receives a response of a subject.

Claims

1. A mouse, comprising: a housing, a trackball and a circuit board disposed inside a cavity formed by the housing, and a cable connected to the housing, wherein the housing comprises an upper shell and a lower shell, and an inner surface of the upper shell and an inner surface of the lower shell are coated with a silver and copper conductive paint layer, and a concentration of silver and copper in the conductive paint is 13%-17%, wherein said cable is a full-shielded USB cable, and a shielding layer of said fully-shielded USB cable is connected to the silver and copper conductive paint layer on the upper shell or the lower shell.

2. The mouse according to claim 1, wherein the concentration of the silver and copper in the conductive paint is 15%.

3. The mouse according to claim 1, wherein a thickness of the silver and copper conductive paint layer is no less than 18 pm.

4. The mouse according to claim 1, wherein an electrical resistivity of the silver and copper conductive paint layer is less than 10/a film thickness of 20 pm/a distance of 10 cm.

5. The mouse according to claim 1, wherein said circuit board and screws used to mount the circuit board are non-magnetic.

6. A signal transmission apparatus, comprising: a transmitter connected to the mouse of claim 1 and a receiver connected to a remote computer, wherein the transmitter comprises a USB connector, a USB HOST interface chip, a first processor, a first level translator, a first fiber transceiver and a first fiber connector that are sequentially connected and the receiver comprises a second fiber connector, a second fiber transceiver, a second level translator, a second processor and a USB SLAVE interface chip that are sequentially connected and wherein the first fiber connector and the second fiber connector are connected by an optical fiber.

7. The signal transmission apparatus according to claim 6, wherein the first processor is disposed on a first single chip and the second processor is disposed on a second single chip.

8. The mouse according to claim 1, wherein the mouse avoids signal interference in a magnetic field.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is an exploded view of the mouse of the invention;

(2) FIG. 2 is a functional block diagram of the signal transmission apparatus of the invention;

(3) FIG. 3 is a functional block diagram of the transmitter;

(4) FIG. 4 is a functional block diagram of the receiver.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) In order to make the objects, technical solutions and advantages of the invention clearer, in the following, the invention will be explained in details with reference to the accompanying drawings.

(6) As shown in FIG. 1, a mouse for magnetic resonance disclosed by the invention comprises an upper shell 1, a lower shell 2, a trackball 3, a circuit board 4 and a cable 5. The inner surfaces of the upper shell 1 and the lower shell 2 are coated with a silver and copper conductive paint layer having a concentration of 13%-17%, and the preferable concentration is 15%. The thickness of the silver and copper conductive paint layer is no less than 18 m. The electrical resistivity of the silver and copper conductive paint layer is less than 1/a film thickness of 20 m/a distance of 10 cm. The circuit board 4 and screws used to mount the circuit board are non-magnetic elements. The cable 5 a fully-shielded USB cable, a shielding layer of said fully-shielded USB cable is connected to the silver and copper conductive paint layer of the upper shell or the lower shell.

(7) The present invention also discloses a manufacturing method for the mouse for magnetic resonance, which comprises the following steps:

(8) Step 1, taking a commercial USB apart, and separating the circuit board 4, the cable, the upper shell 1 and the lower shell 2;

(9) Step 2, diluting commercial silver and copper conductive paint to a concentration of 13%-17% (preferably, 15%) by adding absolute ethyl alcohol, stirring the silver and copper conductive paint for no less than 5 minutes when diluting;

(10) Step 3, applying or spraying the diluted silver and copper conductive paint onto the inner surfaces of the upper shell 1 and the lower shell 2;

(11) Step 4, air drying the upper shell and the lower shell, which are coated with the silver and copper conductive paint layer in the shade, for no less than 2 hours;

(12) Step 5, baking the air dried upper shell 1 and lower shell 2, the baking temperature of the baking process being 65 C., the baking time being no less than 30 minutes.

(13) Step 6, detecting the electrical resistivity of the inner surfaces of the baked upper shell 1 and lower shell 2. The measurement is performed by a digital multimeter (normally, the scale of the multimeter should be adjusted to be smaller than 200), and the resistance of the multimeter itself and the resistance of the wire should be subtracted from the measurement result should. When the electrical resistivity is less than 1/a film thickness of 20 m/a distance of 10 cm, it can determined that it is qualified.

(14) Step 7, replacing the circuit board and screws used to mount the circuit board with non-magnetic elements, replacing the original cable with a fully-shielded USB cable, and connecting the shielding layer of fully-shielded USB cable to the silver and copper conductive paint layer of the upper shell or the lower shell.

(15) At the end, the mouse can be assembled again.

(16) As shown in FIG. 2, FIG. 3 and FIG. 4, the present invention also discloses a signal transmission apparatus used for the mouse for magnetic resonance. the signal transmission apparatus comprises a transmitter that is connected to the mouse and a receiver that is connected to a remote computer; the transmitter comprises a USB connector, a USB HOST interface chip, a first processor, a first level translator, a first fiber transceiver and a first fiber connector, which are sequentially connected; the receiver comprises a second fiber connector, a second fiber transceiver, a second level translator, a second processor and a USB SLAVE interface chip, which are sequentially connected; the first fiber connector and the second fiber connector are connected by fiber. wherein, the first processor, the second processor are both single chips.

(17) Obviously, the invention may have other embodiments. Many modifications and alternatives can be made by a person skilled in the art without departing from the spirit and its essence of the invention, and such modifications and alternative also fall within the scope of protection of claims of the invention.