JPH068554Y2 - Ultrasonic probe - Google Patents

Description

The present invention relates to an electronic scanning ultrasonic probe, and more particularly to an ultrasonic probe having an improved cable processing structure.

2. Description of the Related Art A conventional electronic scanning ultrasonic probe will be described with reference to FIGS.

As shown in FIGS. 3 and 4, the housing 1 is composed of a housing body 2 and an upper lid 3. An ultrasonic transducer 4 that radiates ultrasonic pulses to the subject and converts reflected sound waves from the inside of the subject into electric signals is provided inside the front side of the housing body 2. In this ultrasonic transducer 4, a plurality of strip-shaped piezoelectric elements having electrodes on both sides of a piezoelectric body are linearly arranged. A cable 5 for connecting the ultrasonic probe to the ultrasonic diagnostic apparatus main body is held in the upper lid 3, and a socket 6 and the like connected to the cable 5 are built in. As shown in FIG. 4, the socket 6 is arranged on the lower surface of the relay board 7 made of a printed board or the like and fixed by soldering or the like, and each lead pin 8 of the socket 6 is projected upward from the hole of the relay board 7. . On the relay board 7, made of metal or the like along the central longitudinal direction,
The relay board retainer 9 that prevents the relay board 7 from being deformed is screw 10
It is fixed by. The socket 6 is attached to the input pin 11 of the ultrasonic transducer 4, and the lead pin 8 of the socket 6 is connected to the tip of the core wire 12 of the cable 5 with a solder or the like.
Is installed. Therefore, the ultrasonic transducer 4 is connected to the ultrasonic diagnostic apparatus main body via the cable 5.
A shield cover 14 for protecting the socket 6, the lead pins 8 and the like from external electromagnetic waves and electrical noises is fixed around the socket 6 by a fixing means such as adhesion, and one end is grounded by a lead wire 15. . As shown in FIG. 4 and FIG. 6, the cable 5 is made up of several tens to hundreds of shield wires bundled into one, and the outer circumference of the core wire 12 of each shield wire is sequentially covered with a core wire. A coating 16, a core wire shield mesh 17, and an inner peripheral coating 18 are provided, and an outer peripheral shield mesh 19 and an outer peripheral coating 20 that sequentially block electrical noise from the outside are provided on the outer peripheries of these shielded wires. The lower edge portion is folded back to the outer periphery of the outer periphery coating 20, and the shrinkable tube 21 and the like are provided and fixed to the outer periphery of this folded back portion. In front of the shrinkable tube 21, only the core wire coating 16 is left on the outer periphery of the core wire 12, the core wire shield mesh 17 is peeled off, and several tens or hundreds of the core wire shield mesh 17 are collected by the lead wire 22. It is grounded and electrical noise between adjacent core wires 12 is prevented. The edge of the folded portion of the outer peripheral shield mesh 19 is grounded by the lead wire 23.

However, in the above-mentioned conventional ultrasonic probe, the core wire shield mesh 17 extends over a long distance from the shield wire branch portion above the relay board retainer 9 to the connection portion with the lead pin 8. Since the core wires 12 are separated, there is a problem that the core wires 12 are easily affected by electrical noise between the core wires 12 or from the outside, and it becomes difficult to obtain a stable image.

Therefore, the present invention solves the above conventional problems, and provides an ultrasonic probe capable of improving the image quality by preventing the core wire from receiving electrical noise. Is what you are trying to do.

Means for Solving the Problems In order to achieve the above object, the present invention is provided with a plurality of strip-shaped piezoelectric element input pins provided on a housing body on one surface for connecting to the other surface. A socket having a plurality of lead pins, a relay board having the socket fixed to the lower surface, and a relay board retainer mounted on the upper surface of the relay board, which is mounted in the vicinity of the relay board and grounded to the housing body. A ground plate, a plurality of core wires, a core wire coating covering each of the core wires, and a core wire shield mesh covering each of the core wires.

Action The action of the above technical means is as follows.

That is, attach a ground plate on the relay board retainer that is extremely close to the socket to which each core wire of the cable is connected, connect the shield mesh of each core wire to this ground plate and ground it, and cover each core wire up to the vicinity of the ground plate with the shield mesh Therefore, it is possible to prevent each core wire from receiving electrical noise.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2 show an ultrasonic probe according to an embodiment of the present invention. FIG. 1 is a partially cutaway side view of a main portion of a cable connected state, and FIG. 2 is a partially plan view thereof. is there.

In the present embodiment, the same members as those in the above-mentioned conventional example are designated by the same reference numerals, the main part of the present invention will be described, and the description of other configurations will be omitted. As shown in FIGS. 1 and 2, the socket 6 is attached to the lower surface of the relay board 7 by soldering or the like, and each lead pin 8 of the socket 6 is projected upward from the hole of the relay board 7 as in the conventional example. ing. On the upper surface of the relay board 7, a relay board retainer 9 made of metal is fixed to the relay board 7 by screws 10 along the longitudinal direction of the central portion. A ground plate 24 is attached on the relay board retainer 9. The ground plate 24 is formed in a channel shape in which side plates 26 are integrally provided along both longitudinal edges of the bottom plate 25, and notches 27 are formed in a part of the side plates 26 and the bottom plate 25 corresponding to the positions of the lead pins 8. Is formed,
The bottom plate 25 is fixed to the relay board retainer 9 with screws 28. The core wire 12 of each shield wire is pulled out with the core wire coating 16, the core wire shield mesh 17 and the inner circumference coating 18 attached to the outer periphery thereof and cut into a required length, and the inner circumference coating of the tip end portion is performed.
18, the core wire shield mesh 17 and the core wire coating 16 are peeled off to expose the tip end portion of the core wire 12, and the pin 13 is fixed to the exposed tip end portion of the core wire 12 by soldering or the like. Is covered. The pin 13 is mounted on the lead pin 8 of the socket 6 protruding from the upper surface of the relay board 7. Therefore, each core wire 12 is covered by the core wire shield mesh 17 from the core wire soldering portion of the pin 13 to a portion of a few mm rearward, and a part of each shield mesh 17 of the portion separated from the core wire 12 between them is the ground plate 24. Notch 27
And is soldered to the bottom plate 25 (only one position is shown in FIG. 2). An end portion of the relay board 7 and one end of the bottom plate 25 of the ground plate 24 are connected by a lead wire 29, and the relay board 7 is grounded to the housing 1 by a lead wire 30 connected to the one end.

The configuration of the cable 5 used in this embodiment is the same as that of the conventional example, and the plurality of inner wire coatings 18 for covering the core wire shield mesh 17 shown in FIG. 1 are combined into one outer shield mesh. The outer circumference is covered with 19, and the outer circumference is covered with an outer circumference covering 20. The lower edge portion of the outer peripheral shield mesh 19 is folded back to the outer periphery of the outer peripheral coating 20 in the portion where the plurality of extension coatings 18 are combined into one, and the contraction tube 21 is provided on the outer periphery of the folded back portion. The outer peripheral shield mesh 19 is fixed, and the edge of the outer peripheral shield mesh 19 is grounded to the housing 1 by the lead wire 23.

According to this embodiment, the ultrasonic transducer 4 is provided on the lower surface of the relay substrate 7.
The socket 6 connected to the relay board 7 is attached, the ground plate 24 is attached to the upper surface of the relay board retainer 9 attached to the upper surface of the relay board 7, and the core wire 12 is attached to the vicinity of the ground plate 24, which is very close to the socket 6, by the core wire shield mesh 17. Since it is covered and the ground wire shield mesh 17 is connected to the ground plate 24 to be grounded,
The removed portion of the core wire shield mesh 17 in the core wire 12 can be extremely reduced, so that the influence of electrical noise received by the core wire 12 can be reduced, and a stable image can be obtained.

As described above, according to the present invention, the socket is mounted on the lower surface of the relay board, the ground plate is mounted on the relay board holder mounted on the upper surface of the relay board, and the core wire of the cable connected to the lead pin of the socket is attached. Since the vicinity of the ground plate extremely close to the socket is covered with the shield mesh and the shield mesh is connected to the ground plate to be grounded, the removed portion of the shield mesh in each core wire can be extremely reduced. Therefore, each core wire can be prevented from receiving electrical noise, and a stable image can be obtained.

[Brief description of drawings]

1 and 2 show an ultrasonic probe according to an embodiment of the present invention. FIG. 1 is a partially cutaway side view of a main portion of a cable connected state, and FIG. 2 is a partially plan view thereof. 3 to 5 show a conventional ultrasonic probe, FIG. 3 is a perspective view of the whole appearance, FIG. 4 is an exploded perspective view, and FIG. 5 is a cross-sectional view of a main portion in a cable connected state. is there. 1 ... Case, 2 ... Case body, 3 ... Top cover, 4 ... Ultrasonic transducer, 5 ... Cable, 6 ... Socket, 7 ... Relay board, 9 ... Relay board holder, 12 …… Core wire, 13 …… pin, 17 …… Core wire shield mesh.

Claims (1)

[Scope of utility model registration request] 1. A socket having a plurality of strip-shaped piezoelectric elements provided on a housing body on one surface thereof and having a plurality of lead pins for connection on the other surface thereof, and the socket having a lower surface thereof. A fixed relay board, a ground plate mounted near the relay board via a relay board retainer mounted on the upper surface of the relay board and grounded to the casing body, a plurality of core wires and these core wires A cable comprising a core wire coating for covering the core wire and a core wire shielding mesh for covering the core wire coating, respectively, the core wire is connected to the lead pin, and the core wire shield mesh is connected to the ground plate. Sonic probe.