JPS5825308B2 - Shingo Hatsuseiki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal generator, and more particularly to an improvement in a signal generator that selects and generates various combinations of a plurality of on/off signals.

In order to select and generate various combinations of multiple on/off signals, the conventional method involves arranging multiple contact patterns of conductive parts in parallel on a printed circuit board in order to generate on/off signals. A number of contact ends corresponding to the number of rows of the contacted pattern were brought into contact and electrically conductive.

In other words, as shown in the conventional example in FIG. 1, four contact patterns 2 to 5 shown by diagonal lines are arranged on a printed circuit board 1, and a contact member 6 made of a conductive material is placed on top of the contact patterns 2 to 5 in the vertical direction in the drawing. Sliding.

The to-be-contacted pattern is a conductive part A1 for being contacted.
It has a connecting conductive part B for electrically connecting the two, and C indicates a gap between adjacent contact patterns.

The contact member 6 has the same number of contact ends as the contact pattern at the tip of the foot portion 6f.

When the contact member 6 is brought to any position from 81 to S16, as shown in the side view of the contact mode at this time in FIG.
The contact ends 6b to 6c contact the contacted patterns 2 to 5, and the input from the input end 6a is the output end 2a.

It is output to 3a, 4a, and 5a.

When the pattern to be contacted is provided on the printed circuit board in this way, the width la of the conductive part A to be contacted, the width lb of the conductive part B for connection, the width lc of the gap C, the width le of the contact end of the contact member are manufactured. This is the design factor above.

In other words, it is necessary to downsize the signal generator when it is incorporated into a small machine such as a camera, but when the contact end at the tip of the contact member 6 slides on the contact conductive part of the pattern to be contacted, the elasticity of the foot part 6f Due to the inaccuracy of the means for displacing the contact member, the contact end oscillates.

Therefore, it is necessary to design the width and gap of the pattern to be larger than the width of the contact end so that the contact end does not come into contact with the connecting conductive part or the adjacent contacted pattern. Reducing the size of the contact member makes manufacturing and assembly processes more difficult, and it becomes difficult to maintain accuracy.

For these reasons, in the conventional method, the size of the signal generator had to be large.In particular, as digital control became more common, the number of rows of contact patterns increased depending on the number of bits, and the It was too thick and inconvenient to incorporate into small electronic devices.

The present invention is intended to improve the above-mentioned drawbacks, and its feature is that the contact end of the contact member can span two or more rows of the contacted pattern, It has a new shape.

Embodiments of the signal generator according to the present invention will be described below with reference to the drawings.

FIG. 3 is a diagram showing the first embodiment.

In the figure, 11 is a printed circuit board, 12 to 16 are contact patterns, 17 is a conductive part for input, 18 is a contact member that is displaced between S21 and S3O, 18a, 18b, and 18c are contact ends of the contact members, and 17a is a Input end, 12a.

13a, 14a, 15a, and 16a are output ends.

In this embodiment, one contact end of contact member 18 has two
In the adjacent contacted patterns, the connection conductive part B for electrically connecting the contacted conductive part A is arranged so as to be in contact with the conductive part A. The upper and lower left and right sides are arranged alternately, so that the connecting conductive parts B never come into contact with the contact ends.

By displacing the contact member 18 with such a configuration, 821 to S
If 30 is selected, the contact end 18a.

The input from the input end 17a is outputted to the output ends 12a to 16a by contact between the contact patterns 18b and 18c.

In the configuration of the present embodiment described above, the number of contact ends relative to the number of rows of contacted patterns is halved, but the width of the signal generator is limited as follows.

In other words, when creating this type of signal generator, since the contact pattern is made by etching the printed circuit board, it is best to make the width of the connecting conductive part B and the width of the gap part C as small as possible. Although it is preferable, in reality, when the thickness of the copper foil of the printed board is about 5μ to 30μ, B,
The width of C is about 0.1 to 0.151 nrL.

On the other hand, the contact member is manufactured by etching or pressing a metal plate, but since the contact member slides on the printed circuit board by itself with a certain strength, the metal plate is thick and the width of the contact end is at least 0. In reality, it is about 0.3 mm to eliminate instability such as horizontal shaking and to facilitate the manufacturing process.
A width of about 5 mm is required.

Therefore, in order to reduce the width of the signal generator, the width of the electrically conductive portion A to be contacted must be reduced.

Here, the sizes of the configurations of the conventional example shown in FIG. 1 and the embodiment according to the present invention shown in FIG. 3 are compared as follows.

In the conventional example, the width of two rows of the contact pattern is ld, the width of the contact conductive part A is la, the width of the connecting conductive part B is lb, and the width of the gap C is lJc.

Letting the width of the contact end of the contact member 6 be le, margins lf and 1 g are set on both sides of the contact end so that the contact end is connected to the connecting conductive part B.
It must be made so that it does not touch the adjacent pattern.

Therefore, le+lf+1g-1a+lc...
・・・・・・・・・・・・ (1) ld-21a+21b+
21c・・・・・・・・・・・・・・・・・・ (2)
holds true.

On the other hand, in the embodiment of the present invention, the width of two rows of contact patterns is md, the width of the conductive part A for contact is ma, the width of the conductive part B for connection is mb, the width of the gap C is mc, If the width of the contact end of the member 18 is me, and the margins on both sides of the contact end are mf and mg, then me+mf+mg=2ma-hnc--(3)md
=2ma+2mb+2mc --(4) holds true.

Here, in the conventional example and in this example, it is a normal manufacturing method to make the connecting conductive part B and the gap C as narrow as possible.
Its width is replaced by the minimum value X determined by the printed circuit board etching technology, lb=lc=mb=mc=x ・”・・−−・(
5) holds true.

It is also preferable to make the width of the contact end of the contact member as narrow as possible, but this is also replaced by the minimum value y determined by the design dimensions and manufacturing technology that take into consideration the operational stability of the contact member, le=me=y...・・・・・・・・・
...(6) holds true.

Once the dimensions of the contact end of the contact member are determined, the width of the necessary margin on both sides of the contact end is also determined and replaced with the minimum required value 2, lf=1g=mf=mg=z... ...
・・・・・・(Power is established.

Expressions (5), (6), and (7) are converted into expressions (1) and f
2), (3), r4) and get y+2z-la+z...
... (8) 1d=2Aa+4x ・
・・・・・・・・・・・・・・・ (9) 3y+2□-2
m a + x ・・・・・・・・・・・・・・・
・ <10) md=2ma+4x ・・・・
・・・・・・・・・・・・ 00 formula (8), (10)
From 7a=2ma・・・・・・・・・・・・
...(12) Equation (9), (Iυ, 02) holds true.

Here, it is ideal that X, which represents the width of the connecting conductive part B1 and the gap part C, is infinitely small, and if this is achieved, 20
3) becomes, and according to the present invention, the width of the signal generator is halved.

However, in actual technology, x = 0.1
The width ma of the electrically conductive portion to be contacted is also limited by the width of the contact end, and ma is approximately 0.3 to 0.5 myt.

Therefore, according to equation (13), it can be reduced to about 1/1.7 to 1/1.6.

On the other hand, if the size of the pattern to be contacted is constant, the width of the conductive part A to be contacted is replaced by a constant value V, and 7a=ma=v...
...(14) holds, and formulas (1) and (3
, (5) and (7), le = v+x-2z me = 2 v+x-2a, and the width me of the contact end of the contact member according to this embodiment is slightly less than twice the width le of the contact end of the conventional example. Since the size of the contact member can be reduced by half, the manufacturing process of the contact member can be made easier and the operation stability can be improved as well as the size of the foot portion 18e can be reduced by half.

Of course, if you make a combination of making the width of the contact end a little thicker and making the width of the contacted pattern a little smaller,
The effects of improved contact members and miniaturization of the signal generator appear at the same time.

Furthermore, in this embodiment, sliding stability can be improved by providing uneven engagement portions 1918 on the printed circuit board 11, on the contact member, and on the contact end.

FIG. 4 is a diagram showing a second embodiment.

In this embodiment, the contact end of the contact member is continuous, and the connecting conductive part of the contacted pattern is not provided on the front side of the substrate.

In the figure, 21 is a printed circuit board, 22 to 26 are contact patterns, 27 is an input conductive part, 28 is a contact member that is displaced between 841 and 855, 28a is a contact end of the contact member, 27
a is an input end, 22a.

23a, 24a, 25a, 26a are output ends, 22
b.

Reference numerals 23b, 24b, 25b, and 26b are backside conductive parts arranged on the backside of the printed circuit board, and 29 is a through hole for passing conductive means connecting the backside conductive part and the pattern to be contacted.

FIG. 5 shows a side view of a portion of this second embodiment.

Since the second embodiment has the above-described configuration, if the contact member is made into a simple shape as shown in the figure and 841 to S55 are selected, the contact between the contact member 28 and the contacted pattern will cause the input end 27a to The inputs are outputted to the output terminals 22a to 26a.

Since the contact member has a simple shape as described above, it is easy to manufacture.

Furthermore, since there is no conductive part for connection as described above on the contact surface of the printed circuit board and there is no need for margins on both sides of the plurality of contact ends of the contact member as described above, it is possible to In comparison, the width of the signal generator in which the contact patterns are arranged side by side can be made much smaller.

Further, since the width of the contact end of the contact member is sufficient to sufficiently cover the juxtaposed contact patterns, the holding and displacement operations of the contact member are facilitated.

FIG. 6 shows a perspective view of a modification of the contact member.

The contact member 29 shown in FIG. You can make better contact.

The contact member 30 shown in the figure has a micro-brush shape on the contact end 30a side.

This is made by bundling thin metal wires and is intended to improve contact with the pattern to be contacted, and can be applied to the contact ends of the first and second embodiments. .

FIG. 7 is a concrete configuration diagram of an embodiment in which a signal generator according to the present invention is incorporated into a dual priority camera.

In the figure, reference numeral 41 denotes an information setting dial with a shutter speed value displayed on its top surface and an aperture value displayed on its side.

41a is an index indicating the selected shutter speed value.

Reference numeral 42 denotes a click plate that engages with a click pawl (not shown), and a pin 41 whose fitting hole 42b is fixed to the dial 41.
b and rotates integrally with the dial 41, and a contact member 48 is fixed to the lower surface thereof.

Reference numeral 46 denotes a shaft, which is fixed to the board 49 together with the printed circuit board 47 for information output.The click board 42 and the information setting dial 41 are rotatably fitted to the shaft 46, and the nut 5
9 prevents removal in the thrust direction.

The information output printed circuit board 47 cooperates with the contact member 48 to constitute a signal generator that outputs a digital signal, and is commonly used for setting both the shutter speed value and the aperture value, and outputs an electric signal.

Reference numeral 50 denotes a winding shaft, the end portion 50a of which is connected to a mechanism (not shown) for performing shutter charging, film charging, etc.

Further, the winding shaft 50 is rotatably fitted inside the shaft 46, and the end portion 50b is fitted so as to rotate together with the intermediate member 51.

The winding lever 52 engages with the pin 51b of the intermediate member 51 to be integrated with the intermediate member, and is locked to the end 50b of the winding shaft 50 by a stopper 55.

Therefore, the winding lever 52 is integrated with the winding shaft 50.

Reference numeral 43 denotes a priority mode switching member for shutter speed and aperture, which is arranged on the outer periphery of the information setting dial, and is slidable on the inside of the cover 44.Indicator 4 indicates the selected aperture value.
Has 3c.

The cover 44 is fixed to a base plate 49, and has a window 44a for displaying the aperture at a position that is easily visible to the operator.

The priority mode switching member has an operating section 43a for operating from the outside and an end section 43b.

The switch S60 transmits the priority mode switching to a calculation section of the camera (not shown), and is connected to the end 4 of the priority mode switching member.
Collaborate on 3b.

Next, the operation of the embodiment shown in FIG. 7 will be explained.

In the case of shutter speed priority photography, set the lightning mode switching member 43 to the T side.

At this time, the aperture position display r-1 of the information setting dial and the switch S1 cooperate to switch an arithmetic circuit (not shown).

When the information setting dial 41 is arbitrarily rotated to set the shutter time value on the index 41a, the contact member 48 fixed to the click plate 42 slides on the information output printed circuit board 47 and is set. TV that supports shutter speed
The value is output.

In the case of aperture priority, when the priority mode switching member 43 is set to the A side, the aperture position display appears in the window 44a and the switch S60 is switched.

When the aperture value is set on the index 43C, a preset AV value is output from the information output printed circuit board 47.

As detailed above, according to the signal generator according to the present invention,
Since the component parts of the signal generator can be easily manufactured, the size of the signal generator can be reduced, and the operational precision can be improved, it is ideal for being incorporated into small electronic machines such as cameras.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional example of a signal generator. FIG. 2 is a side view of a part of the example shown in FIG. FIG. 3 is a diagram showing a first embodiment of a signal generator according to the present invention. FIG. 4 is a diagram showing a second embodiment. FIG. 5 is a side view of a part of the example shown in FIG. FIG. 6 is a perspective view of a modification of the contact member. FIG. 7 is a detailed configuration diagram of an embodiment in which a signal generator according to the present invention is incorporated into a dual-priority camera. 1.11.21.47...Printed circuit board, 2~
5.12-16.22-26... Contacted pattern, 6, 18, 28, 29, 30.48... Contact member, 6b - 6e, I Ral 8c, 28a
. 29a, 30a...Contact end, 17.27...
...Conductive part for input, A...Conductive part for contact, B...Conductive part for connection, C...Gap part.

Claims (1)

[Scope of Claims] 1 A plurality of contact patterns in which contact conductive parts are connected by connecting conductive parts are arranged in parallel, and a contact member is provided which generates a signal by contacting the contact conductive parts of the patterns. In the signal generator arranged above, it is preferable that the contact member has a contact end extending over two or more rows of the plurality of contact patterns arranged in parallel. signal generator. 2. The contact end is displaced along the boundary of two adjacent rows of contact patterns, and is capable of contacting the contact conductive parts of the two rows of contact patterns, and the connecting conductive part is connected to the contact end. of the area in contact with. 2. The signal generator according to claim 1, wherein the signal generator is located outside. 3. The signal generator according to claim 1, wherein the connecting conductive portion is covered with a non-conductor so as not to come into contact with the contact end.