CN212513242U

CN212513242U - Full-sealed miniature button type sensor

Info

Publication number: CN212513242U
Application number: CN202021576631.5U
Authority: CN
Inventors: 王宇萍
Original assignee: Huodinggebikai Suzhou Electronic Measurement Technology Co Ltd
Current assignee: Huodinggebikai Suzhou Electronic Measurement Technology Co Ltd; Hottinger Bruel and Kjaer Co Ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-02-09
Anticipated expiration: 2030-08-03

Abstract

The utility model provides a totally enclosed miniature button sensor, including sensor body and apron, the sensor body with apron sealing connection, the sensor body by be provided with PCB and strain gauge in the inner space that the apron is sealed. The utility model provides a thereby sensor adopts apron and sensor body fixed connection's mode to realize the inside sealed of sensor body, and is sealed effectual, and waterproof grade can reach IP69K, is applicable to the occasion of high temperature and high humidity, sunlight insolate, heavy greasy dirt and corruption.

Description

Full-sealed miniature button type sensor

Technical Field

The utility model relates to a sensor technical field especially relates to a miniature button sensor of totally enclosed.

Background

In an industrial weighing system, such as a key touch feeling tester, pressure monitoring of a cold and hot press, mechanical overload force monitoring, crane boom force monitoring and the like, the application range is limited due to the limitation of the size of a mechanism. The circular diaphragm sensor has the advantages of small size, high precision, wide measuring range and accurate and reliable signals, and is widely applied because the design is not limited by narrow use space.

The diaphragm type sensor on the market at present is generally oblate in shape, is installed at the bottom, and is loaded at the top central point, or is a hollow structure, and is also installed at the bottom and loaded at the top annular surface, but no matter which structure, the sealing mode is to use hygroscopic silica gel to cover a strain area and a circuit area, the waterproof grade of the silica gel seal can reach as high as IP65, and the diaphragm type sensor cannot be applied to the application occasions of IP69K waterproof grade, such as the occasions needing high-temperature high-pressure cleaning of test equipment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a totally enclosed miniature button sensor to overcome prior art's not enough.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model discloses a totally enclosed miniature button sensor, including sensor body and apron, the sensor body with apron sealing connection, the sensor body by be provided with PCB and strain gauge in the inner space that the apron is sealed.

As one of the preferred schemes of the utility model, the sensor body includes the cylinder, the storage tank that is used for installing PCB and strainometer is offered to the one end of cylinder, the inside concave yield of storage tank forms the recess, the loading groove has been seted up to the other end of cylinder, form the elastic strain area between recess and the loading groove, the diapire of loading groove is the loading terminal surface.

Further preferably, a positioning sleeve is arranged at the center of the accommodating groove, the bottom of the positioning sleeve is communicated with the loading groove, a positioning hole is formed in the center of the cover plate, and the head of the positioning sleeve is inserted into the positioning hole.

Still further preferably, the cover plate is fixedly connected with the end face of the cylinder by laser welding.

Still further preferably, the connecting portion of the cover plate and the end face of the cylindrical body is in a circular ring structure.

As one of the preferred schemes of the utility model, be provided with many steel needles on the apron, PCB will steel needle connection on strainometer and the stainless steel apron is in order to realize signal output.

Further preferably, the steel needle is sealed to the cover plate by glass resin.

Still further preferably, the outer ring of the steel needle on the cover plate is a fixed surface.

As one preferable embodiment of the present invention, the elastic body is made of stainless steel.

Compared with the prior art, the utility model has the advantages of:

the utility model provides a thereby sensor adopts apron and sensor body fixed connection's mode to realize the inside sealed of sensor body, and is sealed effectual, and waterproof grade can reach IP69K, is applicable to the occasion of high temperature and high humidity, sunlight insolate, heavy greasy dirt and corruption.

The connecting part of the cover plate and the sensor body is designed into a circular ring type so as to reduce the influence on the output signal of the sensor after welding.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural view of a fully-sealed micro button sensor according to a preferred embodiment of the present invention;

fig. 2 is a schematic top view of a fully-sealed micro button sensor according to a preferred embodiment of the present invention;

fig. 3 is a schematic top view of a cover plate according to a preferred embodiment of the present invention;

FIG. 4 is a cross-sectional view at A-A of FIG. 3;

fig. 5 is a schematic front view of a sensor body according to a preferred embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-5, the utility model discloses a totally enclosed miniature button sensor, including sensor body 1 and apron 2, sensor body 1 and 2 sealing connection of apron, be provided with PCB4 and strain gauge 5 in the inner space that sensor body 1 is sealed by apron 2.

The sensor body 1 comprises a cylinder 10, a containing groove 11 used for installing the PCB4 and the strain gauge 5 is formed in one end of the cylinder 10, the containing groove 11 is recessed inwards to form a groove 12, a loading groove 13 is formed in the other end of the cylinder 10, an elastic strain area 14 is formed between the groove 12 and the loading groove 13, and the bottom wall of the loading groove 13 is a loading end face 15.

The center of the containing groove 11 is provided with a positioning sleeve 16, the bottom of the positioning sleeve 16 is communicated with the loading groove 13, the center of the cover plate 2 is provided with a positioning hole 21, and the head of the positioning sleeve 16 is inserted into the positioning hole 21.

The cover plate 2 is fixedly connected with the end face of the cylinder 10 in a laser welding mode. The connecting part of the cover plate 2 and the end face of the cylinder 10 is in a circular ring structure. The connecting part of the cover plate 2 and the sensor body 1 is designed into a circular ring type so as to reduce the influence on the output signal of the sensor after welding.

A plurality of steel needles 3 are arranged on the cover plate 2, and the PCB4 connects the strain gauge 5 with the steel needles 3 on the stainless steel cover plate 2 to realize signal output. Wherein the steel needle 3 is sealed on the cover plate 2 by glass resin 6. The steel needle 3 replaces a cable to be used as signal output, so that the cable cost is saved, and wiring is avoided.

The outer ring of the cover plate 2 positioned on the steel needle 3 is a fixed surface.

The embodiment of the utility model provides a totally enclosed miniature button sensor's theory of operation as follows:

the strain gauge 5 senses the deformation and transmits an analog signal to a digital amplifier through a Wheatstone bridge, the digital amplifier amplifies the received analog signal to generate a digital signal, and the digital signal is transmitted to a digital acquisition system of a customer through a cable.

Through the technical scheme, the embodiment of the utility model provides a thereby the sensor adopts apron 2 and the mode of sensor body 1 fixed connection to realize the inside sealed of sensor body 1, and is sealed effectual, and waterproof grade can reach IP69K, is applicable to the occasion of high temperature and high humidity, sunlight insolate, heavy greasy dirt and corruption.

Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a miniature button sensor of totally enclosed which characterized in that: the sensor comprises a sensor body and a cover plate, wherein the sensor body is connected with the cover plate in a sealing mode, and a PCB and a strain gauge are arranged in an inner space sealed by the cover plate.

2. The fully-sealed micro button sensor according to claim 1, wherein: the sensor body comprises a cylinder, wherein one end of the cylinder is provided with a containing groove used for installing the PCB and the strain gauge, the containing groove is recessed inwards to form a groove, the other end of the cylinder is provided with a loading groove, an elastic strain area is formed between the groove and the loading groove, and the bottom wall of the loading groove is a loading end face.

3. A fully sealed miniature button sensor according to claim 2, wherein: the center of the containing groove is provided with a positioning sleeve, the bottom of the positioning sleeve is communicated with the loading groove, the center of the cover plate is provided with a positioning hole, and the head of the positioning sleeve is inserted into the positioning hole.

4. A fully sealed miniature button sensor according to claim 3, wherein: the cover plate is fixedly connected with the end face of the cylinder in a laser welding mode.

5. The fully-sealed micro button sensor according to claim 4, wherein: the end face connecting part of the cover plate and the cylinder is of a circular ring structure.

6. The fully-sealed micro button sensor according to claim 1, wherein: the cover plate is provided with a plurality of steel needles, and the PCB connects the strain gauge with the steel needles on the stainless steel cover plate to realize signal output.

7. The fully-sealed micro button sensor according to claim 6, wherein: the steel needle is sealed on the cover plate through glass resin.

8. The fully-sealed micro button sensor according to claim 6, wherein: the outer ring of the steel needle on the cover plate is a fixed surface.

9. The fully-sealed micro button sensor according to claim 1, wherein: the cover plate is a stainless steel cover.