JPS58713A - Mechanical displacement extent detecting device - Google Patents

Abstract

PURPOSE:To reduce variation width of a resistance value of electric conductor resistance, by providing an electric signal lead-out termial of a comb-line electric conductor pattern, and an electric signal lead-out terminal of a common return circuit pattern, on the sides being opposite to each other against the sliding direction of a brush. CONSTITUTION:A comb-line electric conductor pattern 102 is fixed and placed on an insulating substrate 105 by means of vapor-deposition, etc. In case of a time lag between when a pulse has reached some value due to a time lag of a magnet Mg2 itself, a mechanical lag of fitting of an adsorption lever and a stop wheel, etc., and when slide of a brush 101 has stopped actually, etc., the lag portion is adjusted by providing comb-line patterns (e'-n') before a portion corresponding to the time lag portion from a stop position (e-n) of the brush.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting the amount of mechanical displacement of a member.

Conventionally, a comb thin conductor pattern and a common return pattern are provided on an insulating substrate, and a brush linked to a moving member is slid on these patterns, thereby converting the amount of mechanical displacement of the member into an electrical signal. Quantity detection devices have been proposed.

However, in such a conventional device, there was a considerable resistance value between the lead terminal of the turn and this sliding position (depending on the sliding position of the brush with respect to the turn).

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional devices and provide a mechanical displacement lid detection device.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the mechanism of the diaphragm control section of the exposure amount control device according to the present invention, and the same figure shows a state in which film winding and shutter charging are completed. 30
1 is an aperture shilling, and this iris shilling 301 is engraved with an automatic aperture) l index and a manual aperture 9 index, as well as a protrusion 3.
01 m and a force section 301b are provided. 302
is an index for matching the automatic aperture EE index and the manual aperture index. 303 is an aperture preset ring, and this aperture reset ring 303 is biased to rotate in the direction of the hour hand by a spring 303aK, and has a protrusion 303b that can be engaged with the protrusion 301m of the key aperture ring 301. . In the front, the aperture preset ring 303 is provided with an arm 3Qc, and the preset ring 303 determines the bell crank O oscillation movement via an aperture 9 setting force ring (not shown) by means of a lever 303d installed in the preset ring 303. This bell crank is an aperture (not shown) that regulates the rotation of the drive ring.
)C) It determines the 8th degree. 304 is a bottle installed in the front aperture drive ring, and the end of this bottle 304 is attached to the spring 3.
05& engages with the automatic diaphragm lever 305 which is rotated counterclockwise. This automatic aperture lever 305 has a rising portion 305c and a falling portion 305d,
A movable contact piece of the hold switch SH is engaged with the falling portion 305b of the hold switch SH. Further, an intermediate lever 307 is pivotally mounted on the same shaft 306 of the automatic diaphragm lever 305 . 308
is a winding shaft of a winding lever (not shown), and this winding shaft 30
A winding cam 309 is fixed to the end surface of 8. 31
0 is a rotatable intermediate lever, and a pin 310a provided at one end of this intermediate lever 310 is engaged with the winding blade 309. Further, a pin 310b is provided at the other end of the intermediate lever 310, and this pin 310b engages with one end of the intermediate lever 307 and -fi 311m of the mirror drive lever 311. Also, the first Kintei lever 313 is charged by a bottle 310c provided on the intermediate lever 310. This intermediate lever 3
At the other end of 07, a bin 312aK provided at one end of a rotatable charge lever 312 can be fitted. This charge lever 312 is biased to rotate counterclockwise by a spring 312dK. Mg 1 is an electromagnet with a first tensioning permanent magnet that engages with one end 313a of the Nl tensioning lever 313, and the other end 313b engages with one end 314 of the release lever 314.
a and the spring 313C. Also, by rotating the ninth pin 310c installed on the intermediate lever, one end force of the first Kinti lever 313 is applied to the fifth surface a13.
engage with d. A pin 314b is installed at one end of the release lever 314, and the pin 314bK is connected to the other end 315 of the mirror drive engagement lever 315, which has an end engaged with one side 311C of the mirror drive lever 311.
a is locked. One end of a rotatable EE locking lever 316 is locked to the ends 111314d and 314e of the release lever 314, and a bottle 312b implanted in the charge lever 312 is locked.

Further, a bottle 314c is provided at the other end of the release lever 314.
is installed, and the movable contact piece of the memory retention switch sM is locked. Moreover, the movable contact piece of this switch sM is EE
It is directly locked by the lock button 317. This release lever 314 is biased to rotate counterclockwise by a spring 314f. 318 is a sector gear 31g, and this sector gear 31g is locked to the other end of the locking lever 316.

This sector gear 318 includes gears 319m and 319b forming a speed regulating mechanism 319 and a stop wheel 319c.
are meshing. Further, a slider R8□ of a pulse generation switching means R1 for determining a preset aperture value is attached to the sector gear 318. A gear 320 is attached to the shaft 318 of this sector gear 318, and an EE charge gear 321 meshes with this gear 320. A lever 327 is coaxially fixed to this gear 321, and this lever 327 is attached to the charge lever 312.
0 is in contact with the other step portion 312e. A bottle s1mb is installed in the dragon targi 7318, and this bottle 318
The end face of b is pivotally connected to a support lever 3211 and identified as a good signal lever 321.

One end of this signal lever 3290 locks the arm 303e of the diaphragm cover reset ring 303C).
.

The WE seven-hole gear 31g is forced counterclockwise 111# onto the sector gear 31a by the O spring 3031, and is strongly urged clockwise against the friend spring 318c.

(MIl, diaphragm) This magnet with a permanent magnet for control attracts Mg and is attached at -<-330 so that it can attract nine iron pieces 331. The third suction lever 33Q is urged to move counterclockwise KB by the lever 331aK, and when the lever 3304 is turned ON, the nine end can charge the stop wheel 319@ of the speed regulating mechanism ALL. t&% discontinuation lever 330 other end KtJ
Charge lever 3120 minutes and one end 312f
are in contact with each other. A bottle (332) is provided which is in contact with the movable contact piece of the manual switch B, and the end face of this bottle 332 is in contact with the movable contact piece of the manual switch B.
01★Al130 l bK is in contact. The mirror drive lever 311 has a 1M extension device (not shown), and the drive lever 311 has a spring 3114.
] is rotated counterclockwise, and one end is locked to the other side of the mirror drive engagement lever 315.

The tip tension lever 331 is rotated counterclockwise by a spring 3331, and its tip engages with the planting pin 334a of the front curtain gear 334, and the other end is a magnet with a permanent magnet for shutter control. , K adsorption is possible.

This front curtain gear 334 meshes with a dot-O front curtain binion 335 for one front curtain (not shown).

Before the construction 2-drive par 3110 kinty part 311b
K is locked by the tension lever 336. When the tension lever 3B6riN2 m movement lever 311 is moved, the nine springs 336aK are energized counterclockwise.
One end is coaxially supported by the tj-drive lever 311 and engaged with the push-up lever 337.

Press t, raise l// -137 -@@337m is rotated clockwise by mirror up operation and single 11KN2
-It is structured so that it can be uploaded.

The other end of this push-up lever 337 is provided on l-3311, and the upper part of the lever locks the bottle 33 (a). ζOi
The two s3 hatch is rotatable around the kenfu axis 33$b. 336C is the electric tool return spring o
33m is a nine rear curtain gear provided coaxially and separately from the front curtain gear 3s4. A bottle 339a is installed above the meeting. [l is the suction lever rotated by the bin 3311aK, ζ
The OT attachment lever 346 is that iron piece! 14@aK) Comes with a permanent magnet for shutter control! Dunnett Mg and K are adsorbed. This suction lever 340Fi is always supported by a spring 340bK so as to be rotatably held by the magnet 46. 341Fi is a trailing curtain signal lever that is rotated by the bin 339a, and this lever J-34 is constantly connected to the locking bin 341b by the spring 341 a K.
It is rotated and held in the position. The tension lever 3
The end portion 336b of 36 is engaged with the trailing curtain signal lever 341. Then, the transmitted light of the photographing lens (not shown) is transmitted through the lens 338. Focus plate 342. condenser lens 343
．． Eyepiece 34 via INK
gK) Photographer Kl! recognized. 346 is a light receiving element such as a silicon blue cell. 347 is a shutter button that has a first release switch S11 inside. 501 is a button for displaying the exposure amount, and by pressing the button, the L-shaped lever 352 is moved clockwise KBlk-8, and the 1 display switch SP' and the hold switch 8 are
H1', lamp switch SL, SL'(#1!l
1l) 0s2 when t is on. FIG. 1 is a block diagram showing an embodiment of the exposure amount control device according to the present invention. Reference numeral 2 denotes a photometering section which scoops light and logarithmically compresses the photographic object consisting of a light receiving element 346 such as a silicon photoreceptor shown in ts1, an operational amplifier 2', and a q diode 3'. 4' is an A/D converter which converts the output of the photometric section (2) into a digital value; 05' is a register which stores the output of the section 1Ilt.

6' is the object brightness value By value of the tIA calculator register 5' and the digitized filter five sensitivity value Sv.
Add values. 7' is a subtracter which connects the addition@6'0 output terminal to the -1O input terminal, and the other input terminal receives the shutter exposure value which is logarithmically compressed and digitized via the switch By when the shutter priority is O. , TV value is logarithmically compressed and digitized via the shutter control switch sT when the aperture priority is given to the aperture value and the aperture value and the mamma value are input. l!
m' is a register and in the case of shutter priority, the above subtraction 1
B? ') is calculated and the 9 Av value is calculated, and when the aperture) priority is O, the i value is stored. 01G' is the aperture) step number pulse generation circuit, and the camera lens O# is different from the camera lens O# when the shutter priority is set. is on. 11' is a register, and the acid register stores the pulses generated from the pulse generating circuit via the switch SP. 9' is a comparator circuit which generates an output when the aperture value stored in the register 1' and the pulse signal of the register 11' match, and outputs an output from the aperture control magnet M5.9 through the switch 8D. 08' is a delay circuit that drives the front curtain magnet (M) when the mirror has finished rising after the shutter is lowered. 14' is a time-fixing circuit, and the specific circuit 14' applies the rear curtain magnet y3. to drive. 13' is a register, 1 is a shutter dial, L is a 2-amp switch, and SD is a magnetic switch, which is switched in conjunction with the manual switch SP. BT is a shutter control switch, and the switch transmits the h pulse signal to the register 13'. ST' is a switch that switches in conjunction with the switch 87. BP' is a display switch that operates in conjunction with lamp switches SL and 8L'. 8W is a switch for manual control, which changes the shutter speed value in hours*Bm in manual mode.
Tell K.

M3WJ is a 5W theory example of a stage pulse generation circuit shown in Figure 2.
〜鳵'' is the point OII of the drum sweet tender means.
The contact point 1'% *' generates multiple pulses. Tr is a transistor whose contact point contacts the key register exciter and generates an output (turns on when the key is running). cFi'' connector, R' forms a differential path with a resistor, differentiates the output of the transistor T, and generates a pulse. ◇E is a power source.

No. 411'Fi A digital control device based on the main beak, that is, a comb positive conductor butter y() 811m1 constituting the pulse generation switching means R1 disclosed in No. 111
"t's 4o 11KThhte, 101 ti"
FIG. 3 is a side view of a brush RU that can be blocked by sliding on a fine. This slides left and right on the pattern and generates a pulse signal 010! tj (L tooth-shaped conductor pattern with an insulating base [9 conductor pieces are fixedly arranged on 10S by a method such as vapor deposition. 103 is an independent 9 pattern that can be arranged at the sliding jI #1 position, and this In addition to obtaining a sliding start position signal, sliding the comb-like conductor pattern 102 also serves to reduce wear on the first pattern of the comb-like conductor pattern 102. In II, the black part is the conductor pattern, and the white part is the insulating substrate. This is the front page of 0 104 (9 common return patterns provided in parallel with the comb-tooth pattern), 16@ and 107 are the comb-tooth pattern and the common return pattern O terminal lead-out lines.
In the figure, a is the width of the conductor when sliding in a comb-tooth pattern, b is the same interval, and 0 is the stopping position in consideration of the sliding speed of the sliding brush O. □e, d shows the difference between the positions of the comb-tooth pattern O, which were arranged after considering the sliding speed of the brush, and the above-mentioned stop positions. Each of the fourth Wi's OI' to 'O' and the common return pattern 107 form a contact group l-1# shown in the *S diagram. In FIG. 4, when the pusher 101 (R 1.

By providing a nine-stroke starting position pattern 108 independent of the comb-tooth pattern at the *mm floor position of the pusher, if the movement-floor position note is obtained, the tooth pattern is maintained at K<1°. I am doing it.

Next, when the generated bass mold reaches a certain value (this value will be reached later for 0, aK), if you want to stop the Pushi 1010 II movement, the building isa * and the second illustrated magnet ■ - own O time battle companion, the first wJ Indication suction lever 330. $1111 Indicating stock wheel 31 By the mo II machine fishing group involved in the meeting, Arus reached a certain value and the brush strokes were applied to the vanguard and Yi.
A time deviation occurs at 014 until k stops.

In order to correct this, in the present invention, the stop position of the pusher is adjusted according to the travel time delay according to the stop position, that is, the stop position of the brush O corresponding to each aperture value to be adjusted. K before 1
<L, tooth-like patterns e' to n' are provided to adjust the amount of lead. When the sliding speed of the brush 101 changes, the above-mentioned outside of adjustment c and d will differ depending on each stop position.

In addition, in the case as shown in FIG. 6 where the sliding movement of the brush is different from the uniform sliding movement and the uniform sliding movement, the tooth-shaped pattern 102 is the seventh
Just place it as shown in the figure.

In the figure, X is the start position of the brush, E to T are the brush stop positions, and y-d is the position of a comb-like pattern for generating a brush stop signal corresponding to the stop positions E to TK. In other words, the distance between E and 〆 in Fig. 7, the distance between F and H', the distance between G and G', the distance between H and H', ■ and I
', the distance between J and J', the distance between K and K, the distance between L and L', and the distance between M and l as shown in Figure 7. ~T' are equal intervals, such as the interval between the father and V, the interval between N and W, the interval between 0 and 0', the interval between P and P', the interval between Q and Q', and the interval between R and R. interval, -8 and S'
and the distance between T and T', respectively, are arranged at the same distance. From this, even if the brush slides as shown in Figure 6, the brush stop signal is generated at the round point according to the speed of the brush, so an accurate throttle value can be obtained.

In the case of FIG. 7, the brush moves at a constant acceleration from E' to M', and then moves at a constant speed from the point up to T'.

Next, the comb pattern 102 is formed into a metal film,
In addition, if the film thickness is extremely thin, for example, even if the conductor pattern is made of gold, the resistance value will be a small value, and depending on the sliding position of the brush with respect to the pattern, The resistance value between this sliding position will change. In contrast, in the present invention, a common return path pattern 104 as shown is provided in parallel to the sliding direction of the comb-tooth pattern 102, and its lead terminal 107 is provided at the end opposite to the lead-out terminal 106 of the comb-tooth pattern. This is to cancel out the change in resistance value due to the sliding position as described above. Furthermore, this common return pattern 104
The film thickness and outer shape of the electrodes are adjusted appropriately so that the resistance value between both electrodes becomes constant.

Next, the sliding bush 101 (R□) and the comb tooth pattern 1
The contact with 02 is not a point contact, but has a certain contact area, and due to the influence of the height difference between the conductor part of the rounded tooth pattern and the board, the width a of the comb teeth and the distance between them are equally spaced. If this is done, the resulting pulse signal will have a short off time, resulting in a signal with a significantly different on and off width. In order to correct this and obtain a pulse signal whose on and off widths are approximately equal, the present invention uses the method shown in the figure.
The lia of the tooth-shaped pattern is made smaller than its spacing, and K is designed to obtain equally spaced pulses that are easy to handle in an electric circuit.

Figure 5 is an explanatory diagram showing the contact state between the sliding brush and the comb-tooth pattern.
Touch 111 as shown in Figure 1 + 4, and if it is extremely thin, move the figure (turn).
Like KJI. In this case, the on and off times of the brush and pattern are not equal as shown in the figure. Figure 5 15
1 and - in FIG. 5 indicate the case where the conductor @a of the comb-like pattern in the case of r@ is made narrower than its nRNib, and the on and off times are made approximately equal and round.

Next, we will discuss the operation of the exposure amount control device according to the present invention.
WA.

For moderate shutter priority, use Ozu aperture) ring 3010E
When one finger is set to the index 302 like the vagina 0 shown in the figure, the cam @ 301b and the bottle 332! 1 touch turns on the manual switch gP and switches 8P.
, SD is turned on, and the aperture stage pulse generation circuit 10' is connected to the register 11'. Then shutter button 3
47 turns on the Lullies switch SR, and the first tensioning electromagnet M□ with permanent magnet is reverse excited and the first tensioning lever 313, which does not lose its magnetic force, is rotated clockwise by the spring 318eK. move. That is, the first tension lever 31B
One end 5lab and one end 314a of the release lever 314
[1 is removed, and the release lever 314 is released by the spring 314.
Rotates counterclockwise from fK. On the other hand, photometry by the photometer IK is started in synchronization with the shutter release, that is, when the subject enters the light receiving element 346, an output corresponding to the subject brightness from the light receiving element 346 is transmitted via the operational amplifier 2' and the log diode 3'. The analog output is supplied to the A-D converter 4' and generated corresponding to the subject brightness by the wrinkle A-D converter 4', which is converted into a pulse number by a well-known 4D7#i- and converted into a digital signal. and transmitted to the register 5'. Further, by rotating the release lever 3140, the memory switch SM# is turned off via the bin 314e to end and memorize the measurement by the photometer I.
(2-The drive latch lever 315 moves, but the details will be described later.) First, with one counterclockwise movement of the release lever 314, the latch lever 316 moves counterclockwise and the sector gear 318 moves. and release the zero charge.

First, the signal lever 329 is moved downward via the co-movement pin 318b of the sector gear 318, so the arm 3G! The aperture ring 303 that locks the lc is attached to the spring 308m) spring 318c
The sector gear 318 is moved clockwise against this.

A gear 319m forms this ninth speed regulating mechanism 319.

At 319, 319e rotates to move the last stage stop wheel counterclockwise. In front of you, sector gear 3.
1110 Multi-pulse generation layer switching means Rh by rotation
o Every time the knob R□ is slid and comes into contact with the contact l-1' of the pulse generating switching means R1, the KTr is turned on and a pulse is generated via the differential circuit.
', the pulses are counted and stored and transmitted to the first comparison path 9'.

On the other hand, the nine digital values stored in the register 5' and corresponding to the subject brightness are logarithmically compressed and digitized by a known method, and then added to the nine fill five sensitivity values and the sv value by an adder 6'. The KSv value and the BY value at one input terminal of the subtractor 7' are added and input as a friend value, Bv+8v value. Further, the koji input terminal of the armpit adder is inputted with the mourning jatsume speed value STv value, which has been logarithmically compressed and digitized by a known method, through the switch SP". The ~+Sv value and the TV value are input to the subtracter. 7' and stored in register 12' as the Bv+5v-TV value, 0 or register 1.
In 2', AV=Bv+5v-TV is performed as a photographic calculation, a round value is stored, and the aperture value Av is stored.

After the AV value is stored in the register 12' as described above,
The pulse generated by the pulse generation switching means is transmitted to the comparator circuit 9' via the register 11',
The output of the cough register tt' is compared with the Av value stored in the register 12', and when the two image power values match, the comparator circuit 9' generates an output, reverse excites the magnet M, and releases the iron piece 331. . For this reason, the suction lever 3'30 is attached to the spring 331.
A is rotated counterclockwise by a, and the folding portion thereof engages with the stop wheel 319cK to stop the rotation of the stop wheel 319c. Therefore, the position of sector gear 3111 is determined. Therefore, as described above, the sector gear 318
When the 0 rotation stops, the aperture reset ring 303 is rotated to a position with an appropriate aperture value, thereby determining the position of the bell crank. In other words, the stop position of the aperture 9 preset ring 303 is the light receiving element 346 that measures light through the photographic lens.
The value is determined by combining the information from the camera, the shutter speed, the fill, and the exposure compensation information.

On the other hand, in parallel with the start of such HE operation, the automatic throttling mechanism also starts. That is, when the Mg or K reverse excitation pulse is applied, the first Kintei lever 313 is activated by the spring 313e.
K rotates clockwise, and the release lever 314 rotates counterclockwise, so that the end 31 of the mirror drive engagement lever 315 is released via the O pin 314b! +a rotates counterclockwise. That is, one side 311e of the mirror drive lever 311 and one end 315 of the two-drive engagement lever 315.
The lock is released, and the second drive lever 311 is rotated counterclockwise by the spring 311dK. At the same time, the claw part 311b of the mirror drive lever 311 and the tension lever 336
Since these are in the locked state, the push-up lever 337 that pivotally supports the tension lever 336 rotates counterclockwise. Therefore, the bent portion 337b of the push-up lever 337 engages with the rising portion 305e of the automatic multiplex lever 305 to rotate the automatic throttle lever 305 clockwise. When this rounding hold switch SH is turned on, a nine-pin 304 installed in the diaphragm drive ring is operated to preset the diaphragm according to the position of the bell crank. The clockwise rotation pushes up the flip-up bottle 338a of the mirror 338, causing the mirror 338 to flip up. Also, when the shutter button is pressed, the delay circuit 8' is activated, and after a certain delay circuit, current flows through the magnet M. Mg is reversely excited 0 slow till path 8
The slow arc time is the time from when the shutter release is released and the aperture is closed until the mirror finishes flipping up. When magnets) M, , are reversely excited, the front curtain shaft is rotated from the pin 334aK on the front curtain gear 334, which is rotated counterclockwise by a spring (not shown).
-333 rotates clockwise. This nine first curtain gear 33
4-tin rotation begins and the first number travels via the first number pinion 335. Also, the delay circuit 8' allows the magnet MJ to
When current flows through r, the time constant circuit xi'Kj1m
A signal to start the timed operation is transmitted from the circuit 8'. The shutter time value is input to the wrinkle time setting circuit 14' via the switch BP', and the time setting circuit 14' is activated by the time setting operation start signal, and the shutter time value that has been input is inputted to the wrinkle time setting circuit 14'. After that, apply a current to the magnet Mg4
．． is reversely excited. Therefore, the lock on the trailing gear 339 by the suction lever 340 is released, so the trailing gear 339 is unlocked.
39 begins to rotate and causes the trailing curtain to travel via the trailing curtain pinion 500.

Before, at the end of the rear curtain run, turn the rear curtain gear 3390 (J)
At the 339 m bin, the trailing curtain signal lever 341 rotates counterclockwise and the mirror tensioning lever 336 rotates clockwise. This rotation of the mirror tension lever 336 releases the engagement with the mirror drive lever 311. This rounded push-up lever 337 is supported by the spring 305 and the automatic aperture lever 30.
Rotate clockwise through 5 and <? -338 is returned to its original position by a return spring 338eK.

At the same time, the automatic diaphragm 9 lever 305Fi is rotated clockwise by the spring 305m to turn off the hold switch SH, and the 1 diaphragm drive ring planting bottle 304 returns to its original open state. O Then, when the winding shaft 308 performs the winding operation, the film winding and shutter charging are performed, and at the same time, the charging lever 312 is charged via the intermediate levers 310 and 307, and the automatic counter mechanism and mirror mechanism are charged. The engagement is released by the release operation, and the tip portion is engaged again to return to the illustrated state.

Next, the case of performing it manually will be explained. First, select the desired aperture value for the aperture 99 ring 3014D @[302
When it matches, the bin 332 selects the symbol representing the five-part dial AO shutter speed, matches it with the index, presses a manual button (not shown), and turns on the switch 8W. Now, the shutter dial AC) BBfiL is off the index, so switches 8T and ST' are off. Then, by pressing down the shutter button 347,
11 Release switch 8Bl is turned on, the first tensioning permanent magnet electromagnet Mgt a is reverse excited, and the first tensioning lever 313 is rotated clockwise by the spring 313c. l
/ The tension with one end 31451 of bar 314 is released,
The release lever 314 is rotated in the counterclockwise direction by the spring 314fK. As the release lever 3140 moves counterclockwise (b), the locking lever 316 rotates counterclockwise to release the engagement with the sector gear 318. This rounding sector gear 31g is connected to the aperture preset ring 303 by the spring 303aK. Since the signal lever 329 is rotated clockwise against the spring 318, the signal lever 329 is moved to a predetermined downward position via the bin 318b. For this reason, the protruding portion 30 of the aperture preset ring 303Fi (aperture) ring 301 which has the aperture preset ring 303c locked to the signal lever 329
It is rotated by a spring of 303 m to a position of 1 m. As a result, the diaphragm preset ring 303 is rotated to the position of the set aperture value, and before the bell crank position is determined, the release lever 314 is rotated counterclockwise to start the automatic diaphragm 9 mechanism. In other words, release level A-
314 rotates the Z-Lar drive latching lever 315 clockwise from the mirror bin 314bK and performs multiple loading in the same manner as in the shutter priority mode. Then, the mirror 338 is flipped up and the shutter priority As in the case of , after a certain period of time after the shutter release, magnet M5. is de-excited, the front curtain is run, and after the shutter time inputted to the specific circuit 14' via the switch SW, Mg is activated to complete the exposure.

Even after this shutter control, the mirror 338 and the automatic aperture lever 305 are returned to their original positions at the same time as in the case of shutter priority.

Next, in the case of aperture priority, when the EE symbol of the 0 shutter 1 speed dial is aligned with the index, the switch sf which interlocks with the shutter 'EE switch ST and wrinkle switch 8TK is turned on.

Next, as in the case of manual operation, the aperture ring 301 is adjusted to the desired aperture value, and the switches SP and SP'SD are turned off. When the shutter button 347 is pressed down, the Lullies switch 5ikl is turned on.
is reversely excited and the tension lever 313 and release lever 314 are
is disengaged, the release lever 314 moves one step counterclockwise, and the memory switch s is released as in the case of shutter priority.
M is turned off and the side light is completed. By rotating the release lever 314, the engagement between the locking lever 316 and the sector gear 318 is released.
03a causes the aperture preset ring 303 to signal /(
The signal lever 329 rotates clockwise against the spring 318c via the pin 318b.
Lock the A303e to the travel number shi reset ring 3.
03iAMt) The ring 301 is rotated by the spring 303a to the position of the protrusion 301m, and the sector gear is rotated clockwise, and the slider ゛R□ of the pulse generation switching means R1 slides to correspond to the aperture value. In the course of a series of operations to generate the number of pulses, the subject brightness value Bv value stored in the register 5' and the logarithmically compressed and digitized film sensitivity value Sv value are added by an adder 6' and then subtracted by a subtracter 7. ', the added output BY+
The Sv value is inputted to the other inputs of the subtracter 7', and the number of nine pulses and AV value corresponding to the set aperture value are stored and transmitted to the register 13' via the switch ST. Therefore, the output of the subtractor 7' is the 9-value Bv+Sv-AV value obtained by subtracting the M7 value from the BY+Sy value. A degree TV value is obtained. It is stored in the #TvfIIFi register 12' and input to the time setting circuit 14' via the switch ST'. Before, release/(-31
4 rotates counterclockwise, the automatic diaphragm mechanism also starts. That is, by rotating the release lever 3140, the bin 314bK and the mirror drive engagement lever 315 are rotated clockwise to close the diaphragm 9 in the same manner as in the shutter priority mode, and also to flip up the Kt club 31. . From now on, magnets (as in the case of shutter priority)
M,, -fi is reverse excited and runs the first number, time fixed circuit 14
' From K, the calculated friend shutter time II M
, , is activated and the exposure is completed. Even after this shutter control, is it possible to construct the same way as in the case of shutter priority? -: 131 and the automatic diaphragm cutter 305 are restored.

Next, a case will be described in which the exposure amount control device according to Motoya IJIK is used to display the appropriate exposure amount in advance before photographing.

First, the open aperture value of the aperture bv ring 301 is made to match the index 302. ＃Operation manual switch sp sp
and turn off the magnet switch SD.

Also, remove the shutter dial from EE, match the desired shutter speed value with 1 index, and switch ST.

Turn off ST'. Next, press button 5 for displaying the appropriate exposure amount.
Press 01 Lm! Rotate the lever 352 clockwise,
Locking lever! 11 and sector gear 318, and display switch SP' and hold switch S.
", turn on the lamp switches SL and SL'. By releasing the locking lever 316 and the sector gear 31$, the jig reset ring 303 can be rotated clockwise (by the spring 3o31), but the ] Projection part 3 of ring 301
01m) @Crow is locked and does not move at the same time. Shibori J)
As the aperture value of the 9-ring is lowered step by step, the pre-stop ring 303 intermittently rotates clockwise, and the arm 303
The signal lever 329 engaged with the signal lever 329 moves downward intermittently and moves the sector gear 318 clockwise intermittently. As the sector gear 31g rotates, the sliding piece R□ slides on the pulse generating agent switch RR,
Aperture R number pulse generation i path 1 G' generates pulses intermittently as in the case of shutter speed priority, and the pulses are controlled by register 1]' and compared by comparator circuit 9'). The pulse number is calculated in the same manner as in the case, and compared with the nine aperture signal, and when the pulse number and the aperture value signal match, the lamp L is turned on.

As described above, in the present invention, the lead-out terminals of the comb-like conductor pattern and the lead-out terminals of the common return pattern are provided at opposite ends of the brush in the sliding direction of the brush. The width of the change in the resistance value of the conductor resistance caused by the relationship with the moving position is smaller than that of the conventional device, and the electric circuit that divides the electrical signal from the detection device is shown in @3 if described based on an example. This produces an effect that does not adversely affect the switching transistor circuit.

[Brief explanation of drawings]

FIG. 1 is a mechanical diagram showing one embodiment of the exposure amount control device according to the present invention, FIG. 2 is a block diagram of the exposure amount control device according to the present invention, and FIG. FIG. 2 is a circuit diagram showing an embodiment of the aperture stage number pulse generation circuit shown in FIG. FIG. 5 is a diagram showing the contact state between the comb-like pattern and the sliding brush in FIG. 4, FIG. 6 is a curve diagram showing an example of the sliding speed of the brush, and FIG. FIG. 7 is a diagram showing the spacing of the comb-tooth pattern with respect to the nine sliding speeds shown in FIG. 6; R1...Switching means for pulse generation, R, □
...Sliding piece, ■'~n'...Contact, Tr.
...transistor fi c...1 capacitor R
“...Resistance 101...Sliding brush 10
2... Comb tooth-shaped conductor pattern 103...
・Sliding start position pattern 104...Common return pattern 105...-Insulating substrate 6, 7...
...Output terminal. Patent applicant: Canon Co., Ltd. al・φλI

Claims (1)

[Claims] In a mechanical displacement detection device that converts a mechanical displacement of a member into an electrical signal by sliding a brush interlocked with a moving member on a comb-shaped conductor pattern and a common return pattern, the comb-shaped A mechanical displacement detection device characterized in that an electrical signal extraction terminal of a conductor pattern and an electrical signal extraction terminal of a common return pattern are provided on opposite sides with respect to the sliding direction of the brush.