JPS6228969Y2 - - Google Patents

Description

[Detailed description of the invention] The purpose of the invention is to effectively achieve waterproofing and electrostatic shielding of the probe with a simple structure regarding an ultrasound probe used in an electronic scanning ultrasound diagnostic device. be.

An electronic scanning ultrasound diagnostic device has a plurality of tanzaku-shaped piezoelectric vibrators arranged in a straight line, and electronically moves the position of the driven piezoelectric vibrators to change the direction in which the piezoelectric vibrators are arranged. It is used to obtain tomographic images of the subject, and as its performance has improved, it has come to the point where it is actually used for diagnosis in hospitals.

In order to improve observation conditions, probes used in such diagnostic devices are brought into contact with the human body through a coupling agent such as olive oil or liquid paraffin.

Furthermore, when looking at the usage of the above-mentioned probes, they are often used in environments where they are exposed to liquids such as blood or other body fluids, and after use, they are cleaned or wiped with alcohol, soapy water, etc. In either case, the substance is relatively fluid and easily enters the probe.

On the other hand, since we are dealing with weak currents, we are sensitive to external noise, so it is necessary to minimize the influence of that noise.Therefore, a structure is required to prevent leakage of the liquid and external noise. I'm getting old.

FIG. 1 is an overall configuration diagram of a conventional probe having both of the above functions, and FIG. 2 is a sectional view taken along line A-A'. In the figure, the case of the probe is broadly composed of a case 1 and a lid 2. A plurality of piezoelectric vibrators 3 are arranged at the bottom of the case 1, and above them are a connector and a piezoelectric vibrator drive. It has a built-in circuit. Insulating films 4 and 6 are placed between the case 1 and the lid 2 to keep the probe sealed and eliminate electrical influences from the outside.
and a metal film 5 covered therewith.

These insulating films 4, 6 and metal film 5 are fixed to the case with adhesive etc. to ensure complete sealing, but with this structure, maintenance of the transducer and circuit inside the probe becomes extremely difficult. Furthermore, since the insulating films 4 and 6 having a waterproof function and the metal film having an electrostatic shielding function were provided separately, the efficiency of fixing was poor.

The present invention eliminates the above-mentioned drawbacks, and the present invention uses a metal film such as a copper plate that has an electrostatic shielding function, and a highly elastic film that has an electrically insulating effect and covers it with a metal film such as a copper plate that has a waterproof function. A means for preventing water leakage and external noise constituted by a membrane is interposed at the engagement portion between the case and the lid.

An embodiment of the present invention will be described below based on the drawings. In the drawings, parts that are the same as those in FIGS. 1 and 2 are designated by the same numbers, and explanations thereof will be omitted. FIG. 3 shows the overall structure of an ultrasonic probe according to an embodiment of the present invention, and FIG. 4 shows a sectional view taken along line B-B'. In the figure, both sides of a flexible metal film 8 having an electrostatic shielding function are coated with an insulating film 9 made of rubber or the like having a waterproof function, so that the metal film 8 and the insulating film 9 are integrated. membrane 9
A terminal 10 for connecting the metal film 8 to the ground is provided in a part of the terminal 10 to constitute means for preventing water leakage and external noise. The end of the insulating film 9 has a U-shaped cross section as shown in the figure, and a groove corresponding to this protrusion is formed in the case 1.
By crimping it from the outside, it has a structure that allows it to be reliably sealed without using adhesives or the like.

As explained above, the present invention integrates a metal film with an electrostatic shielding function and an insulating film with a waterproof function, and by adopting this structure, the number of parts is reduced compared to conventional ones. This has great practical effects, such as reduced costs, ease of installation, and improved workability, which makes it possible to reduce costs, and facilitates internal parts replacement.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional ultrasound probe, Figure 2 is a perspective view of a conventional ultrasound probe.
3 is an exploded perspective view of an ultrasonic probe according to an embodiment of the present invention, and FIG. 4 is a sectional view of the same. 1... Case, 2... Lid, 3... Piezoelectric vibrator, 4, 6... Insulating film, 5... Metal film, 7... Adhesive, 8... Metal film, 9...
Insulating film, 10... Earth terminal.

Claims (1)

[Scope of utility model registration request] comprising a case containing at least a piezoelectric vibrator and a circuit for driving the piezoelectric vibrator, a lid provided to engage with the case, and water leakage and external noise prevention means installed in the lid, The water leakage and external noise prevention means has an integrated structure by covering the outer surface of the electrostatic shielding metal film with an electrically insulating film having elasticity, and penetrates the electrically insulating film at a part of the electrically insulating film. , one end is connected to the metal film and the other end is provided with a terminal connected to external ground, and the end of the electrical insulating film of the water leakage and external noise prevention means is connected to the case and the lid. An ultrasonic probe, characterized in that the probe is interposed in an engaging portion with the ultrasonic probe.