CN1237702A

CN1237702A - Checking device and checking method for rotary operating electronic element

Info

Publication number: CN1237702A
Application number: CN 99107108
Authority: CN
Inventors: 阿曾荣一; 阿部芳晴
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1998-05-28
Filing date: 1999-05-27
Publication date: 1999-12-08
Anticipated expiration: 2019-05-27
Also published as: MY131976A; JPH11337429A; CN1138134C; JP3800804B2

Abstract

A rotating operation-type electronic component is placed on a mounting plate by keeping a gap in a direction perpendicular to a shaft. A drum in which a chuck is housed in the central part so as to be freely rotatable is turned. An arm which protrudes from the outer circumference of the chuck is pressed at the free end of a plate on which a strain gage is pasted in the intermediate part and one end of which is fixed to the outer circumference of the drum. The shaft is turned and operated by the chuck. On the basis of a change in the resistance value of the strain gage due to the flexure of the plate at this time, the rotating load of the shaft is detected continuously. Thereby, it is possible to obtain an apparatus and a method for the detection of the rotating operation-type electronic component whose rotating load is judged surely, which is guick and whose error is small.

Description

The testing fixture of rotary operating electronic element and inspection method

The present invention relates to be used for the testing fixture and the inspection method of rotary operating electronic element of the switch, variohm, scrambler etc. of various electronic equipments.

In recent years, for example in the multifunction and diversified process of the electronic equipment of communication facilities, vision facilities and stereo set etc., the rotary operating electronic element (to call element in the following text) that is used for these switch, variohm and scrambler etc. has also used has the various operation forms and the apparatus and method of operation feeling.

Existing testing fixture and inspection method for this element describe with Fig. 5～Fig. 8.Fig. 5 is the cut-open view that existing testing fixture represented in summary, and Fig. 6 is the exploded perspective view of Fig. 5.

In two accompanying drawings, element 100 has turning axle 121, by making this axle 121 rotations, operates this element 100.In addition, element 100 has the

mounting hole

123 and 125 that becomes the portion of being mounted about axle 121.

The testing fixture of element 100 has following structure.

Installing plate 200 has through hole 131 in central authorities.In addition, on plate 200, about its hole 131, be provided with protrudent pin 133 and 135.Axle 121 is when running through hole 131, and

133 and 135 is inserted into hole 123 and 125.Like this, be installed on the installing plate 200 as a testing fixture part as the element 100 of checking object.

Chuck 300 tops connect retainer shaft 121.The universal joint 500 of coil spring shape is installed between the upper end of the lower end of chuck 300 and rotating cylinder 400.The lower end of rotating cylinder 400 is fixed with the torque indicator 600 that rotary load is detected.Torque indicator 600 usefulness leads and being electrically connected with checking loop (not shown).

In above-mentioned existing testing fixture, when rotating torques table 600, rotating cylinder 400 is with its rotation.So the rotation of rotating cylinder 400 passes to chuck 300 by joint 500, this chuck 300 makes axle 121 rotations.At this moment, 600 pairs of described torque indicators detect by the rotary load that chuck 300, joint 500 and rotating cylinder 400 pass to the axle 121 of torque indicator 600.Its detection signal is sent to checks the loop.Check that the loop detects above-mentioned rotary load from this detection signal, with its numerical value with compared by predefined reference value, whether the judgement rotary load is in the reference value well.

Yet, in having the existing testing fixture of said structure, as shown in Figure 7, because the finish size of the composed component of element 100 and the error of fit on or

hole

123 and 125 be with the off normal of

133 and 135 etc., so in fact exist the situation of generation off normal to a certain degree between the axial centre of the axial centre of axle 121 and rotating cylinder 400 and torque indicator 600.In this case, although there is off-centre between the two in that, by the deflection of joint 500, chuck 300 can connect retainer shaft 121.

But, in above-mentioned existing testing fixture and inspection method, owing between the axial centre of the axial centre of axle 121 and chuck 300 and rotating cylinder 400 and torque indicator 600, become the inspection that is producing under the eccentric state, so check result generation error.Now its situation is described with Fig. 8 A and Fig. 8 B.Transverse axis is the anglec of rotation of axle 121, and the longitudinal axis is to act on this rotary load of 121.When under producing the state of off-centre as described above, checking, the rotary load of such waveform shown in Fig. 8 A in fact relatively, detecting becomes the whole like that waveform that rises and falls that produces shown in Fig. 8 B.Therefore, judging in the quality, exist the anxiety of generation than mistake by the inspection loop.

In addition, joint 500 is owing to be installed between chuck 300 and the rotating cylinder 400, so relative torque indicator 600 and rotating cylinder 400 produce inertia on chuck 300 when rotating.This inertia becomes along with fast rotational torque indicator 600 greatly, its result, and it is big that the fluctuating of the waveform of rotary load just becomes.Therefore, for suppressing above-mentioned inertia, must check by slow to a certain degree rotating torques table 600, thus the problem when existing Laboratory Fee.

For addressing the above problem, it is a kind of to acting on rotary load reliable detection on the turning axle, rapidly and the testing fixture and the inspection method of error small rotation operating electronic component that the object of the invention is to provide.

For achieving the above object, testing fixture of the present invention has following structure.

Comprise: the rotary operating electronic element that will have turning axle and be mounted portion is reserved the gap and is installed in the described installing plate that is mounted in the portion in the direction vertical with described turning axle; Turning axle is connected the chuck that keeps; Rotation is installed with the rotating cylinder of chuck freely; Attaching foil gauge, an end are fixed on the rubber-like plate of rotating cylinder periphery; From the chuck periphery outstanding and with the arm of the free end butt of plate; The inspection loop that is connected with foil gauge.

In addition, inspection method of the present invention is, installing plate reserved to be installed in gap in the direction vertical with turning axle be located at being mounted in the portion on the element, the turning axle connection is remained on the chuck, be rotated by the rotating cylinder that rotation is installed with freely chuck, attaching the free end that a foil gauge and an end are fixed on the rubber-like plate on the rotating cylinder periphery, pushing is from the outstanding arm of chuck periphery, the resistance change of the foil gauge that produces according to the bending of plate of this moment, is judged the rotary load that acts on turning axle at continuous detecting.Thus, can obtain to detect reliably rotary load, rapid and less testing fixture and the inspection method of error.

Fig. 1 is the cut-open view of testing fixture of the rotary operating electronic element of the present invention the 1st embodiment.

Fig. 2 is the exploded perspective view of Fig. 1.

Fig. 3 A and Fig. 3 B are the cut-open views of Fig. 1.

Fig. 4 is the part stereographic map of testing fixture of the rotary operating electronic element of the present invention the 2nd embodiment.

Fig. 5 is the cut-open view of the testing fixture of existing rotary operating electronic element.

Fig. 6 is the exploded perspective view of Fig. 5.

Fig. 7 is the cut-open view of Fig. 5.

Fig. 8 A and Fig. 8 B are performance plots.

Below, with regard to embodiments of the invention in conjunction with the accompanying drawings.

The 1st embodiment

Fig. 1 is the cut-open view of testing fixture of the rotary operating electronic element of the present invention the 1st embodiment, and Fig. 2 is the exploded perspective view of Fig. 1.

In two accompanying drawings, element 10 is as switch, variohm and the scrambler etc. of checking object, has turning axle 21, operates by making these turning axle 21 rotations.This element 10 is provided with the

mounting hole

23 and 25 that becomes the portion of being mounted about turning axle 21.

The testing fixture of element 10 has following structure.

The installing plate 12 of installation elements 10 is provided with through hole 31 in central authorities.In addition, above the plate 12, about described hole 31, be provided with

outstanding pin

33 and 35 at this.Turning axle 21 is when running through through hole 31, and

33 and 35 is inserted in mounting hole 23 and 25.Like this, be installed on the installing plate 12 that constitutes testing fixture as the element 10 of checking object.

The characteristics of the 1st embodiment are as follows.

The root of

33 and 35, external diameter is slightly littler than the

mounting hole

23 and 25 that inserts them.And, tilting to top ends from this root, the top ends external diameter of upper end is done forr a short time.Therefore, insert at

33 and 35 under the state of mounting

holes

23 and 25,

33 and 35 and mounting

hole

23 and 25 between, reserve the gap in the direction vertical with turning axle 21.

The top of chuck 13 connects and keeps turning axle 21.Chuck 13 rotations are contained in freely the axial centre portion of rotating cylinder 14 by bearing 18.Plate 15 is made of elastic bodys such as sheet metals, and portion is attaching the foil gauge 16 that resistance value is changed according to crooked therebetween.The lower end of plate 15 is fixed on rotating cylinder 14 peripheries, becomes free-ended upper end and arm 17 butts of giving prominence to from chuck 13.Foil gauge 16 usefulness leads and being electrically connected with checking loop (not shown).

In above-mentioned the 1st embodiment, when the power rotation rotating cylinder 14 that is used to from the outside of motor (not shown) etc., the free end that the lower end is fixed on the plate 15 on rotating cylinder 14 peripheries just pushing from the outstanding arm 17 of chuck 13 peripheries.Thus, the revolving force of rotating cylinder 14 passes to chuck 13 by plate 15 and arm 17, and chuck 13 produces rotation.Turning axle 21 rotates along with the rotation of chuck 13.At this moment, with the plate 15 of arm 17 butts because because of the rotary load that acts on the turning axle 21 is crooked, so be attached to the also corresponding generation bending of foil gauge 16 on the plate 15 with this rotary load.The resistance value of this foil gauge 16 is connected with the inspection loop and is sent out, and the inspection loop is detected rotary load from this signal.Detect the loop and again this detected value and predefined reference value are compared, judge whether rotary load is in the reference value well.

Here, because the finish size of the composed component of element 10 and the error of fit on etc., so the installation method on installing plate 12 when the axial centre generation off normal of turning axle 21 being described in conjunction with Fig. 3 A and Fig. 3 B.

At first, as shown in Figure 3A, element 10 is touched and puts on installing plate 12 from the top.Under this state, because the root of the pin 33 above the installing

plate

12 and 35

inserts mounting hole

23 and 25, so the axial centre of turning axle 21 is eccentric in the axial centre of installing plate 12 and chuck 13.

Then, when from below rising chuck 13 and during the lower end butt of the top of chuck 13 and turning axle 21, shown in Fig. 3 B, the element 10 that turning axle 21 is pushed is moved upward, and above the installing plate 12 between produce the space.And slide on the dip plane in turning axle 21 lower ends week in the retaining hole 41 of chuck 13, simultaneously mounting

hole

23 and 25 lower edge slide on the dip plane of pin 33 and 35.Thus, element 10 moves relative to installing plate 12 and chuck 13 phase lefts.Its result, turning axle 21 and chuck 13 both sides' axial centre are consistent states, and chuck 13 connects turning axle 21 and keeps.

So, adopt present embodiment, as the mounting hole 23 of the portion that is mounted of

element

10 and 25 and the

33 and 35 of installing plate 12 between, reserve under the state in gap in the direction vertical with turning axle 21, because element 10 is installed on the installing plate 12, so when chuck 13 connected maintenance with turning axle 21, element 10 only moved the amount in this gap, and chuck 13 can be kept under the consistent state with the axial centre of turning axle 21.In addition, the rotating cylinder 14 axial centre portions that are installed in are held in chuck 13 rotations freely, rotating cylinder 14 and chuck 13 are done the one rotation by the plate 15 that attaches foil gauge 16.

From learning, owing to the axial centre of each composed component can be checked under the state of unanimity, so shown in Fig. 8 A, can obtain the stable waveform consistent with actual rotary load.Therefore, can set the scope of the reference value in checking the loop, set less, can detect rotary load accurately, can obtain to improve simultaneously detection speed, rapidly and little testing fixture and the inspection method of error.

The 2nd embodiment

Fig. 4 is the part stereographic map of the testing fixture of the rotary operating electronic element among the present invention the 2nd embodiment.

In Fig. 4, as follows with the difference of the 1st embodiment.

In chuck 13 peripheries, be provided with 2 outstanding arms 51 and 53, between them, sandwich the free end of the plate 15 that attaches foil gauge 16.Utilize this structure, owing to can make turning axle 21 two directions rotation to the left and right, the rotary load of two directions is detected, so can carry out more high-precision inspection.

In addition, the above-mentioned the 1st and the explanation of the 2nd embodiment in, just in the mounting hole on being located at element 10 23 and 25, by leaving in the direction vertical with gap that pin 33 and 35 with installing plate 12 inserts and structure that element 10 is installed on the installing plate 12 is illustrated with turning axle 21.But also can be on the contrary, not being mounting

hole

23 and 25 but the occasion of the element of teat is set as the portion of being mounted, the hole is set in the installing plate side, install by leaving in the direction vertical with gap above-mentioned teat to be inserted in the hole with turning axle.Perhaps, even in the occasion of the element that this teat and hole are not set, the periphery of element is installed on the installing plate as the portion of being mounted, the present invention is also enforceable certainly.

As mentioned above, adopt the present invention, can detect rotary load reliably, can obtain rapidly and little testing fixture and the inspection method of error as the rotary operating electronic element of checking object.

Claims

1. the testing fixture of a rotary operating electronic element is characterized in that, comprising:

The rotary operating electronic element that will have turning axle and be mounted portion is reserved the gap and is installed in the described installing plate that is mounted in the portion in the direction vertical with described turning axle;

Turning axle is connected the chuck that keeps;

Rotation is installed with the rotating cylinder of described chuck freely;

Attaching foil gauge, an end are fixed on the rubber-like plate of rotating cylinder periphery;

From described chuck periphery outstanding and with the arm of the free end butt of described plate;

The inspection loop that is connected with described foil gauge.

2. the testing fixture of rotary operating electronic element as claimed in claim 1 is characterized in that, is provided with from 2 outstanding arms of chuck periphery, sandwiches the free end of plate between this two arm.

3. the inspection method of a rotary operating electronic element is characterized in that,

The rotary operating electronic element that will have turning axle and be mounted portion is reserved the gap and installing plate is installed in described being mounted in the portion in the direction vertical with described turning axle,

Described turning axle connection is remained on the chuck,

Be rotated by the rotating cylinder that rotation is installed with freely described chuck,

Attaching the free end that a foil gauge and an end are fixed on the rubber-like plate on the described rotating cylinder periphery, pushing makes described turning axle rotation from the outstanding arm of described chuck periphery, and,

The resistance change of the described foil gauge that produces according to the bending of described plate of this moment, is judged the rotary load that acts on described turning axle at continuous detecting.