CN201807520U

CN201807520U - Ultrasonic transducer

Info

Publication number: CN201807520U
Application number: CN2010205609935U
Authority: CN
Inventors: 何炳伟
Original assignee: Chongqing Wei'an Measuring Manufacturing Co Ltd
Current assignee: Chongqing Wei'an Measuring Manufacturing Co Ltd
Priority date: 2010-10-14
Filing date: 2010-10-14
Publication date: 2011-04-27
Anticipated expiration: 2020-10-14

Abstract

The utility model discloses an ultrasonic transducer, comprising a case and a wafer, wherein the wafer clings to and is arranged at the bottom of the cavity of the case, the wafer is provided with a rubber mat, the upper surface of the rubber mat is provided with a pressing block, the pressing block tightly presses the rubber mat into the cavity of the case, the upper surface of the wafer is provided with an extraction electrode, the extraction electrode penetrates through the rubber mat and the pressing block and is extended out of the case, and the outer wall of the case is fixed with an outer electrode. The ultrasonic transducer in the utility model has novel and simple structure and carries out lathe machining on the case, thus eliminating prestress in machining and increasing prestress absorbed by the rubber mat, greatly improving measurement accuracy of ultrasonic transducer, prolonging service life and being easy to realize.

Description

A kind of ultrasonic transducer

Technical field

The utility model relates to a kind of physical measuring instrument, particularly relates to a kind of ultrasonic transducer.

Background technology

The structure of existing ultrasonic transducer is such: comprise stainless steel casing, in the cavity of stainless steel casing, place wafer, on wafer, compress then by the plastics briquetting, at last be provided with the extraction electrode that passes the plastics briquetting in upper wafer surface, this spline structure has deficiency like this at least: the firstth, because stainless steel casing is plates, very thin, therefore its easy shake under stressing conditions, be difficult to simultaneously recover static at short notice, therefore can influence the certainty of measurement of ultrasonic transducer largely; The secondth, wafer directly compresses with the plastics briquetting, when wafer is shaken, because the plastics briquetting can not absorb the stress of existence, thereby make the vitals wafer in the transducer be in for a long time under the effect of stress, thereby influence certainty of measurement largely; The 3rd is that two extraction electrodes are all directly drawn from the upper surface of wafer, and bigger limitation is received in its way of contact etc., occurs the bad deficiency that waits of contact easily.

Summary of the invention

The purpose of this utility model provides a kind ofly can eliminate prestressing force, thereby improves the ultrasonic transducer of certainty of measurement.

For achieving the above object, the technical solution of the utility model is: design a kind of ultrasonic transducer, comprise shell and wafer, wherein wafer is adjacent to the cavity bottom that is installed in described shell, its main points are: be provided with rubber cushion on described wafer, be provided with briquetting at this rubber cushion upper surface, described briquetting is pressed on described rubber cushion in the cavity of described shell, be provided with extraction electrode in described upper wafer surface, this extraction electrode passes and describedly passes described rubber cushion and briquetting and stretch out outside the shell, is fixed with external electrode on described outer shell outer wall.

Adopt above structure because shell adopts is the copper shell of turning processing, its thickness is thicker, therefore in the time spent of doing that is subjected to external force, be not easy to shake, rubber cushion is for having the prestressed rubber cushion of absorption in the above structure of while, this rubber cushion can absorb the prestressing force that exists on wafer or the shell, thereby makes that the utility model hand ectocine is less, improves certainty of measurement of the present utility model largely; External electrode is directly drawn from the outer wall of shell in the above structure, makes that extraction electrode and external electrode can interferences.

For the ease of drawing of extraction electrode, guarantee that simultaneously it has excellent contact, described extraction electrode material is a copper sheet, and this extraction electrode is made of portion of being adjacent to and kink, wherein the portion of being adjacent to is clipped between described wafer and the rubber cushion, and kink passes described rubber cushion and briquetting and stretches out outside the shell.

In order reliably briquetting, rubber cushion and wafer to be fixed in the shell cavity, cavity inner wall top at described shell has the hoop draw-in groove, the cell wall position is higher than described briquetting upper surface on this hoop draw-in groove, in described hoop draw-in groove, back-up ring is housed, described back-up ring is pressed on the described briquetting upper surface, and described briquetting is limited in the cavity of described shell.

Described briquetting central authorities have through hole, and described rubber cushion upper face center is provided with projection, and described projection stretches in the described through hole, and above structure can be good at avoiding the dislocation of rubber cushion and briquetting.

Effect of the present utility model: the utility model novelty simple in structure, shell adopts turning processing, thereby eliminate the prestressing force of its processing, increase rubber cushion and absorb the prestressing force that exists, these can both improve certainty of measurement of the present utility model largely, have to improve the life-span, be easy to advantage such as realization.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is further described.

See also Fig. 1: shown in a kind of ultrasonic transducer, comprise shell 1 and wafer 2, wherein shell 1 is the copper shell of turning processing, described wafer 2 is adjacent to the cavity bottom that is installed in described shell 1, on described wafer 2, be provided with rubber cushion 3, be provided with briquetting 4 at these rubber cushion 3 upper surfaces, described briquetting 4 is pressed on described rubber cushion 3 in the cavity of described shell 1, have hoop draw-in groove 1a on the cavity inner wall top of described shell 1, this hoop draw-in groove 1a goes up the cell wall position and is higher than described briquetting 4 upper surfaces, in described hoop draw-in groove 1a, back-up ring 7 is housed, described back-up ring 7 is pressed on described briquetting 4 upper surfaces, and described briquetting 4 is limited in the cavity of described shell 1, being provided with extraction electrode 5 at described wafer 2 upper surfaces, described extraction electrode 5 materials are copper sheet, this extraction electrode 5 is by being adjacent to the 5a of portion and kink 5b constitutes, wherein be adjacent to the 5a of portion and be clipped between described wafer 2 and the rubber cushion 3, kink 5b passes described rubber cushion 3 and briquetting 4 and stretches out outside the shell 1, is fixed with external electrode 6 on described shell 1 outer wall.

It can also be seen that in Fig. 1: described briquetting 4 central authorities have through hole 4a, and described rubber cushion 3 upper face center are provided with protruding 3a, and described protruding 3a stretches in the described through hole 4a.

The above only is preferred embodiment of the present utility model; it is not restriction with the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. ultrasonic transducer, comprise shell (1) and wafer (2), wherein wafer (2) is adjacent to the cavity bottom that is installed in described shell (1), it is characterized in that: on described wafer (2), be provided with rubber cushion (3), be provided with briquetting (4) at this rubber cushion (3) upper surface, described briquetting (4) is pressed on described rubber cushion (3) in the cavity of described shell (1), be provided with extraction electrode (5) at described wafer (2) upper surface, this extraction electrode (5) passes and describedly passes described rubber cushion (3) and briquetting (4) and stretch out outside the shell (1), is fixed with external electrode (6) on described shell (1) outer wall.

2. a kind of ultrasonic transducer according to claim 1, it is characterized in that: described extraction electrode (5) material is a copper sheet, this extraction electrode (5) is made of portion of being adjacent to (5a) and kink (5b), wherein be adjacent to portion (5a) and be clipped between described wafer (2) and the rubber cushion (3), kink (5b) passes described rubber cushion (3) and briquetting (4) and stretches out outside the shell (1).

3. a kind of ultrasonic transducer according to claim 1, it is characterized in that: have hoop draw-in groove (1a) on the cavity inner wall top of described shell (1), this hoop draw-in groove (1a) is gone up the cell wall position and is higher than described briquetting (4) upper surface, back-up ring (7) is housed in described hoop draw-in groove (1a), described back-up ring (7) is pressed on described briquetting (4) upper surface, and described briquetting (4) is limited in the cavity of described shell (1).

4. a kind of ultrasonic transducer according to claim 1 is characterized in that: described briquetting (4) central authorities have through hole (4a), and described rubber cushion (3) upper face center is provided with projection (3a), and described projection (3a) stretches in the described through hole (4a).