CN2218377Y - Watch waterproof tester - Google Patents

Abstract

The utility model relates to a waterproof tester for a watch, which comprises an air chamber 3 and a test cup 13, wherein, the test cup 13 arranged between an upper flat plate 11 and a lower flat plate 14 which are fixedly connected through an upright post 12; the lower side of the lower flat plate 14 is fixedly connected with an air cylinder 16 with a piston 17; a piston rod 18 which is arranged on the piston 17 and a circular hole which is arranged on the lower flat plate 14 are formed into a sliding fit; one side of the piston rod is provided with a spring 15, and the other side of the piston rod is connected with an air source 11 through an electromagnetic valve 19 and a pipe passage 20; the upper side of the upper flat plate 11 is provided with a pressure sensor 8, and is connected with the air outlet end of the air chamber 3 through an air inlet hole 7, a pipe passage 6 and an electromagnetic valve 5; the air inlet end of the air chamber 3 is connected with an air source 1 through a pipe passage 2 and an electromagnetic valve 1; the upper side of the air chamber 3 is provided with a pressure sensor 4. The utility model has the advantages of little measurement error, high efficiency, and convenient operation.

Description

Wrist-watch waterproof test device

The utility model relates to the wrist-watch checkout equipment, specifically is a kind of proving installation of wrist-watch water resistance.

The device of measuring the wrist-watch water resistance has two kinds, i.e. applied voltage test and air pressurized test in the water.The air pressurized test is used wider to not damage of wrist-watch.Air pressurized proving installation commonly used at present has two classes, and a class is the distortion of surveying watch glass, promptly wrist-watch is placed on to add certain air pressure in the test chamber, measures the watch glass distortion with mechanical type or electronic type micrometer, and then judges whether wrist-watch seals.Another kind of is the variation of observation water column, promptly earlier wrist-watch is pressurizeed in pneumatic shuttle, reduces pressure in a proving installation again, judges by the variation of reliever mercury slug whether wrist-watch leaks gas.These two kinds of test modes are all undesirable, and the former is an indirectly testing, and mistake easily takes place to be surveyed, latter's troublesome poeration, efficient is low.

The purpose of this utility model is to have the problems referred to above in testing at present wrist-watch water resistance, provides a kind of test error little, can be quantitatively strict, and testing efficiency height, wrist-watch waterproof test device easy and simple to handle.

The technical solution of the utility model is: wrist-watch waterproof test device mainly comprises air chamber, test cup and cylinder.Test cup with O-ring seal is between upper flat plate and following flat board.Upper flat plate and following flat board are parallel to each other and are connected by column.Dull and stereotyped lower surface and cylinder are connected down.The piston rod of cylinder and the through hole on the upper flat plate are slidingly matched.Piston rod one side of cylinder is equipped with pressure spring, and the cylinder piston opposite side communicates with source of the gas II by pipeline, solenoid valve.Upper flat plate is equipped with pressure transducer.Air admission hole on the upper flat plate links to each other with the air chamber gas outlet by pipeline, solenoid valve.The air intake opening of air chamber links to each other with source of the gas I by pipeline, solenoid valve.Air chamber is provided with pressure transducer.

During work, shut whole solenoid valves, wrist-watch to be measured is put into the test cup.The test cup is put between upper flat plate and the following flat board.Open the solenoid valve of control cylinder piston motion, piston rises, and by moving on the piston rod push to test cup, closes up with upper flat plate.Open air chamber air inlet solenoid valve, source of the gas I is inflated to air chamber.Close the air inlet solenoid valve of air chamber then, measure air chamber pressure P ₀, open air chamber outlet side solenoid valve again, air chamber is communicated with test cup, measure the pressure P after the connection ₁If gas chamber volume is V _A, according to formula $V_W=V_A\frac{P_0-P_1}{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="Y9521151700061.png"\; state="\{\{state\}\}">P</figure-callout>}}_1}$ Can obtain the volume V of wrist-watch _WIf wrist-watch gas leakage is serious, air enters watchcase, is equivalent to the shared volume of wrist-watch and reduces.Thereby can be according to calculating gained V _WSize judge whether big leakage of wrist-watch.

If wrist-watch is not big leakage, then should open the air inlet solenoid valve and the exhaust solenoid valve of air chamber more simultaneously, making the equal charged pressure of test cup of air chamber is P ₀Gas.Close two solenoid valves then, carry out pressurize.If air enters wrist-watch, pressure must descend, and establishes pressure and reduces to Δ P, and the free space in the test cup is V _F, then can be according to formula Δ M=KV _FΔ P calculates the air leakage Δ M that enters wrist-watch.If the dwell time is t, then can be according to formula $l=\frac{60\&CenterDot;\mathrm{\&Delta;M}}{t}$ Calculate slip.Can judge the water resistance of wrist-watch according to slip.The international standard regulation, the slip of waterproof watch must not be greater than 50 μ g/min.Record the air inlet three-way solenoid valve of shifter cylinder after the leak rate, make cylinder be communicated with exhaust with atmosphere, move down at the spring action lower piston, the test cup resets end of test (EOT).

The advantage of this device is that test error is little, and the efficient height is easy to operate, can realize automatic test after being equipped with computing machine.

Accompanying drawing is a structural map of the present utility model.

The utility model is described in further detail below in conjunction with drawings and Examples:

Wrist-watch waterproof test device comprises air chamber 3, test cup 13, upper flat plate 11, following flat board 14 and cylinder 16.Test cup 13 places between upper flat plate 11 and following dull and stereotyped 14.Upper flat plate 11 is connected by column 12 with following dull and stereotyped 14.Be connected with cylinder 16 below following dull and stereotyped 14.Circular hole on the piston rod 18 of cylinder 16 and following dull and stereotyped 14 is slidingly matched.The connecting rod one of piston 17 is surveyed spring 15 is housed, and opposite side links to each other with source of the gas II by solenoid valve 19, pipeline 20.Pressure transducer 8 is housed on the upper flat plate 15 and has air admission hole 7.Air admission hole 7 is by pipeline 6, and solenoid valve 5 links to each other with the outlet side of air chamber 3.The inlet end of air chamber 3 is by pipeline 2, and solenoid valve 1 links to each other with source of the gas I.Wrist-watch 9 to be measured is placed in the test cup 13.There is not O-ring seal 10 on the test cup 13.Pressure transducer 4,8 should adopt high-precision sensor in the utility model, range is 0.5MPa, as CYG-01 type of Baoji sensor factory, solenoid valve 1,5 will be with leaking minimum 2/2-way valve certainly, as V * 2120 types of Japanese SMC company, solenoid valve 19 is common two-position three-way valve, source of the gas I and source of the gas II all should be that source of the gas II can use 0.4MPa through the purification pressure regulation, and source of the gas I decides according to the wrist-watch test request, be generally 0.2MPa, the volume of air chamber 3 is 30CM ³

Claims (1)

1. a wrist-watch waterproof test device is characterized in that comprising air chamber, test cup and cylinder; Test cup with O-ring seal is between upper flat plate and following flat board; Upper and lower flat board is parallel to each other and is connected by column: upper flat plate lower surface and cylinder are connected; Through hole on the piston rod of cylinder and the following flat board is slidingly matched: piston rod one side of cylinder is equipped with pressure spring, and the cylinder piston opposite side is communicated with source of the gas II by pipeline, solenoid valve; Upper flat plate is equipped with pressure transducer; Air admission hole on the upper flat plate links to each other with the air chamber gas outlet by pipeline, solenoid valve; The import of air chamber links to each other with source of the gas I by pipeline, solenoid valve; Air chamber is provided with sensor.

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