JP2541343Y2 - Electronic instrument operating device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for an electronic instrument, for example, a front side of an electronic instrument such as a motor operating device for controlling an extruder or a temperature controller, which can also be operated by rotation from a setting operation surface. Regarding the structure.

[0002]

2. Description of the Related Art For example, as shown in FIG. 8, a display cover sheet 1 is attached to an operation surface of a motor operating device for an extruder on a front panel which covers a front opening of a case (not shown). A plurality of touch-type operation key marks 3 are formed at the same time, and a measurement value (PV) and a set value (S
The one in which the display units 5 and 7 of V) are visible is well known. Conventionally, the configuration before and after the operation surface of this type of motor operating device is not shown, but the front opening of the bottomed box-shaped case is closed with a front panel, and the operation of electronic components for LED display, push button switches, and the like is performed. A plurality of main circuit boards on which an electronic circuit as a main body of a motor operating device is formed on the back side of the operation circuit board, in which an operation circuit board in which electronic components for the electronic component are arranged facing the front panel is fixed to the back surface of the front panel. On the front panel, holes for fitting the LED display electronic components and the push button switch operation section are formed correspondingly, and the display meaning and function of the LED display electronic components as shown in FIG. 8 described above. In addition, the thin display cover sheet 1 displaying the operation key mark 3 of the push button switch is attached to the front panel.

Then, by touching the operation key mark 3 of the display cover sheet 1 with a hand to operate the push button switch, the motor operating device is operated, and the operating state, such as the number of revolutions, is displayed on the electronic parts for LED display. Thus, the display portions 5 and 7 are formed so as to be readable. In such a motor operating device, an operation circuit board is fixed to the back side of a front panel having a display cover sheet 1 attached to the front surface, and a plurality of main body circuit boards are directly fixed to the operation circuit board or the front panel. In general, they are integrated and inserted into a box-shaped case through an opening on the front side, fixed and assembled.

[0004]

However, in an electronic instrument such as a motor operating device, if various pushbutton switches are selected and operated from above the display cover sheet 1, for example, the rotation speed and speed of the motor of the extruder can be finely controlled. However, at an actual work site, an operator places his / her finger on the operation key mark 3 of the motor controller while pointing his / her face at the motor of the extruder, and pushes the push button switch without looking at the operation key mark 3. It is often operated, and it is difficult to operate the push button switch, and it is easy to cause erroneous operation. Therefore, in recent years, electronic components, such as rotary switches and variable resistors, that change a predetermined value or an output signal by operating an operation rotary shaft have been mounted on an electronic instrument.

[0005] In particular, a rotary switch called a shuttle switch is designed to rotate the operating rotary shaft, which is in a fixed position, clockwise or counterclockwise by hand against the biasing force of the rotary switch. And a function of returning the operation rotary shaft to a fixed position when the hand is released, and tends to be frequently used. However, mounting such an electronic component with an operation rotary shaft on a conventional motor operating device or the like has caused the following problems. In other words, it is naturally conceivable to arrange a rotary switch on the operation circuit board on the back side of the front panel in order to reduce the size. However, even if this operation circuit board is almost the same size as the front panel, the operation circuit board is LED a considerable space
At present, display electronic components and a plurality of push button switches occupy, and there is almost no space for disposing a rotary switch.

For example, when an operation circuit board of 80 mm × 80 mm is used, the four-digit LED display electronic component has a large size of 20 mm × 60 mm and a small size of about 15 mm × 35 mm. And the push button switch is about 10 mm in length and width, and the rotary switch also has a planar dimension of about 30 mm × 35 mm. Therefore, the rotary switch cannot be arranged on the operation circuit board. Furthermore, from the viewpoint of suppressing an increase in cost, it is preferable to mount the rotary switch in a state in which the front panel and the operation circuit board that constitute the conventional motor operating device are diverted, and from this point, a device is required. The present invention has been made to solve such a conventional problem.
It is an object of the present invention to provide an operating device for an electronic instrument, in which an electronic component with an operating rotary shaft can be mounted compactly and existing components can be easily used.

[0007]

SUMMARY OF THE INVENTION In order to solve such problems, the present invention provides a box-shaped case, a front panel for closing a front opening of the case, and a rear panel behind the front panel. An operation circuit board that is located in the case and used for operation from the front panel and has operation electronic components facing the front panel, and an operation circuit that is located in the case behind the operation circuit board and behind the operation circuit board An auxiliary circuit board on which an electronic component with a shaft is arranged; and a knob is directly or indirectly connected to the operation rotary shaft through at least the front panel and the operation circuit board from the front side of the front panel. Things.

[0008]

According to the present invention having such means, if a through hole is formed in the front panel and the operation circuit board, for example,
The knob can be directly or indirectly connected to the operation rotation axis from the front side of the front panel, and the electronic component having the operation rotation axis is compactly mounted, and the operation rotation axis is rotated from the front side of the front panel. Operation is possible, and the configuration changes of the front panel and the operation circuit board are slight.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing one embodiment of the operating device according to the present invention together with the entire electronic instrument (shown in partial side view), and FIGS. 2 and 3 are partially exploded perspective views of the electronic instrument. 2 and 3 are perspective views of the entire electronic meter.
, But they are separated for convenience. The case 9 shown in FIG. 3 is formed from a metal plate into a box shape having a bottomed quadrangular prism shape, and a front panel 11 as shown in FIGS. 1 and 2 is fitted into an opening on the front side thereof to close it. I have.

The front panel 11 is formed of a synthetic resin into a slightly larger plate shape similar to the opening of the case 9.
At the upper and lower ends of the back side, a plurality of support pieces 11a that fit inside the case 9 and hold main body circuit boards (described later) 25 and 27 are integrally protruded. Front panel 11
A shallow and wide recess 11b is formed on the front side of
The display electronic components 17a and 17b, which will be described later,
And a plurality of holes 11c and 11d through which the operation unit of the push button switch 19 is loosely inserted or can be seen,
A rectangular support hole 11e for supporting a bush 33 to be described later is formed therethrough.

In the concave portion 11b of the front panel 11, a thin plastic display cover sheet having a display meaning and function of display electronic parts and an operation key mark (not shown, see FIG. 8) of the push button switch 19 is formed. 13 is pasted. The display cover sheet 13 is also formed with a through hole 13a through which the bush 33 is inserted. As shown in FIG. 8 described above, display meanings of the display electronic component include, for example, a measured value (PV), a set value (SV), and blinking (not shown) according to the type of operation. As the operation key mark of the switch 19, for example, ON, OF
F, synchronization, ratio, etc., and are formed by printing or the like at a position overlapping the operation unit of the push button switch 19.

Upper and lower support pieces 1 on the rear side of front panel 11
An operation circuit board 15 is fixed in parallel to the front panel 11 by a known means between the front panel 11 and the front panel 11 at a small interval. On the operation circuit board 15, a plurality of display electronic components 17 a and 17 b including a 7-segment LED or LCD display element are provided on the front panel 1.
The position where the push button switch 19 fits into the hole 11d or the position where the push button switch 19 fits into the hole 11d is soldered and fixed, and a through hole 15a into which a joint 37 described later is loosely inserted is formed. .

On the back side of the operating circuit board 15, an auxiliary circuit board 21 having substantially the same shape as that of the operating circuit board 15 is located at a certain distance from the operating circuit board 15. As shown in FIG. 3, the auxiliary circuit board 21 is screwed by a L-shaped bracket 23 so as to be sandwiched between the main circuit boards 25 and 27 in the middle of the main circuit boards 25 and 27 (not shown). Projections 25 projecting from upper and lower edges of substrates 25 and 27
1a and 27a are respectively fitted from the inside to locking holes 11f formed in the upper and lower support pieces 11a of the front panel 11 in FIGS. 1 and 2 from the inside, and the front panel 11 is inserted through the main body circuit boards 25 and 27. Has been fixed in parallel. As shown in FIG. 3, a plurality of main circuit boards 29 are also fixed on the back side of the auxiliary circuit board 21 by connectors or other appropriate fixing means (not shown).

The main body circuit boards 25, 27, and 29 form a main electronic circuit forming a main body of an electronic instrument such as a motor controller or a temperature controller.
A microcomputer including an input / output circuit, a storage circuit and the like is formed around U, but the description is omitted because it is not a main part of the present invention. On the operation circuit board 15 side of the auxiliary circuit board 21, a rotary switch, for example, a shuttle switch 31 to be described later is fixed by soldering. Returning to FIG. 1 and FIG. 2, a square pillar-shaped bush 33 having a flange 33a is inserted into the through hole 13a of the display cover sheet 13 and the support hole 11e of the front panel 11 as shown in FIG. The cover sheet 13 is fixed to the cover sheet 13 with an adhesive (not shown) to prevent rotation and prevent the cover sheet 13 from coming off.

Although not shown, when the flange 33a is screwed to the front panel 11 other than the adhesive, the strength of fixing the bush 33 to the front panel 11 is improved, and the bush 33 rotates or comes off due to vibration or the like. do not do. A cylindrical knob 35 as shown in FIG. 4 is rotatably fitted on the flange 33a of the bush 33. The knob 35 has a circular concave portion 35a on one side where the flange 33a fits, and the center of the concave portion 35a, that is, the knob 3
The center of rotation 5 has an insertion hole 35b having a quadrangular shape and four curved corners, and a screw hole 35c is formed from the insertion hole 35b to the opposite surface side.

The opposite side of the knob 35 is a circular shallow concave portion 35d, into which a thin circular display plate 35e is fitted as shown in FIG. The bush 33 has a hollow portion 33b penetrating in the axial direction as shown in FIG.
A joint 37 as shown in FIG. 6 is inserted into the hollow portion 33b, and is connected to the knob 35 as shown in FIG. As shown in FIG. 6, the joint 37 is connected to a hollow shaft 33b of the bush 33 and rotates.
a and a disc-shaped base 37b integrally formed at one end of the connecting shaft 37a.

An annular groove 37c in which an O-ring 39 made of an elastic material is pressed into contact with the hollow portion 33b of the bush 33 and the connecting shaft 37a in the axial direction of the connecting shaft 37a of the joint 37.
Is formed on the side opposite to the base portion 37b to form an insertion portion 37d having an even smaller outer diameter. The insertion portion 37d is divided into two by a slit 37e formed from the distal end surface. The joint 37 inserted into the hollow portion 33b of the bush 33 from the rear side of the front panel 11 has a slit 37e.
As shown in FIG. 1, the insertion portion 37d is elastically press-fitted into the insertion hole 35b of the knob 35 and connected to each other. In order to strengthen the mechanical connection between the knob 35 and the joint 37, it is preferable to insert a self-tapping screw (not shown) from the screw hole 35c and screw it into the slit 37e of the connecting shaft 37a so as to cut the tap.

A groove 37g is formed on a surface of the base 37b of the joint 37 opposite to the protruding surface of the connecting shaft 37a so as to leave a fan-shaped convex portion 37f at a diagonal position. The engagement portion 37h that projects from the front surface protrudes so as to face the engagement portion 37h. Shuttle switch 31
As shown in FIG. 7, the plurality of terminals 31b connected to the auxiliary circuit board 21 (not shown in FIG.
1a hanging from both sides in a single inline shape,
An annular operation rotation shaft 3 from the center of the upper surface of the switch body 31a.
1c has a protruding shape, and the operation rotating shaft 31c at a fixed position is rotated clockwise or counterclockwise against the urging force by urging, so that a certain terminal 31
b is applied to other terminals 31 according to the rotation angle.
b, and has a function of returning the operation rotary shaft 31c to the home position when the hand is released.

The operation rotary shaft 3 of the shuttle switch 31
1c, a pair of engaging grooves 31d are formed at diagonal positions, and the engaging portions 3 of the joint 37 are formed in the engaging grooves 31d.
7 h is engaged, and by rotating the knob 35, the operation rotation shaft 31 c of the shuttle switch 31 is rotated via the joint 37. Then, the front panel 11 on which the display cover sheet 13 is adhered and the operation circuit board 15, the auxiliary circuit board 21, and the main body circuit boards 25, 27, 29 are integrally assembled is taken from the front opening side of the case 9 in FIG. It is inserted and held by suitable holding means to form, for example, a motor operator.

In the electronic instrument operating device thus constructed, the shuttle switch 31 is disposed on the auxiliary circuit board 21 disposed behind the operating circuit board 15, and the shuttle switch 31 is mounted on the operating circuit board 15. The front panel 1 is provided with a through hole 15a through which a joint 37 for rotating operation is penetrated.
By simply providing a support hole 11e for supporting the bush 33 for supporting the joint 37, the knob 1 allows the knob 35 to rotate the operation rotary shaft 31c of the shuttle switch 31 from the front side of the front panel 11. Therefore, the shuttle switch 31 can be mounted on the operation circuit board 15 in a state where the display electronic components 17a and 17b as the operation electronic components and the push button switch 19 are arranged in the same positional relationship as in the related art. The miniaturization can be maintained.

Further, the front panel 11 and the operation rotary shaft 31
Since only the supporting hole 11e and the through hole 15a are provided on the front panel c, the supporting hole 11e and the through hole 15a provided on the front panel 11 and the operation rotary shaft 31c used in the conventional instrument can be used as it is, and the cost can be reduced. Up can be suppressed. That is, the front panel 1 is located between the conventional instrument without the shuttle switch 31 and the instrument with the shuttle switch 31.
1 and the operation circuit board 15 can be shared. Further, the bush 33 holding the joint 37 has the flange 33a fixed to the display cover sheet 13 with an adhesive, and a bush 33 is provided between the hollow portion 33b of the bush 33 and the connection shaft 37a.
Since the ring 39 is press-contacted, dust-proof and waterproof effects can be expected on the front side.

Further, the insertion portion 37d of the joint 37 is fitted into the insertion hole 35b of the knob 35, and the engagement portion 37h of the joint 37 is connected to the operation rotary shaft 31c of the shuttle switch 31.
These knobs 35,
Disassembly of the joint between the joint 37 and the shuttle switch 31 is easy, and disassembly during assembly or repair is easy. By the way, in the above-described embodiment, the configuration has been described in which the knob 35 is indirectly connected to the operation rotary shaft 31c of the shuttle switch 31 via the joint 37 supported by the bush 33, but in the present invention, up to the operation rotary shaft 31c. It is also possible to provide a configuration in which the knob 35 is provided with an extended connecting portion and the knob 35 is directly connected to the shuttle switch 31.

The auxiliary circuit board 21 is sandwiched between the main circuit boards 25 and 27 and is fixed to the front panel 11 through the board. However, in the present invention, the auxiliary circuit board 21 can be fixed to the main circuit boards 25 and 27 by other means without necessarily using the L-shaped bracket 23. Further, the auxiliary circuit board 21 may be directly fixed to the front panel 11 or may be fixed to the operation circuit board 15, and the shape may be smaller than the operation circuit board 15. That is, in the present invention, the fixing method and the shape of the auxiliary circuit board 21 are not important.

Further, in the present invention, not only the shuttle switch 31 as an electronic component with an operation rotary shaft, but also
For example, the present invention can be implemented with an electronic component having an operation rotation axis such as a variable resistor or various rotary switches. In addition,
Front panel 11, operation circuit board 15, auxiliary circuit board 2
The shapes of the circuit board 1 and the main circuit boards 25 and 27 are not limited to those in the above-described embodiment, and are arbitrary.

[0025]

As described above, according to the present invention, an auxiliary circuit board on which an electronic component with an operation rotary shaft is fixed is arranged behind an operation circuit board located behind the front panel, and the front panel and the operation circuit are provided. Since the knob is directly or indirectly connected to the operation rotary axis of the electronic component from the front side of the front panel by penetrating the board, the electronic component with the operation rotary axis can be operated from the front side of the front panel, and By simply forming, for example, a through-hole in the front panel or the operation circuit board, the electronic component with the operation rotary shaft can be mounted compactly without changing the shape or configuration much. Further, there is an advantage that a front panel and an operation circuit board can be shared between an electronic instrument having an electronic component with an operation rotary shaft and an electronic instrument without the electronic component, and does not increase the cost.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of an electronic instrument operating device according to the present invention (partly shown in side view).

FIG. 2 is a partially exploded perspective view showing a main part of the operating device according to FIG. 1;

FIG. 3 is a partially exploded perspective view showing a part that is continuous with FIG. 2 in the operating device of FIG. 1;

FIG. 4 is a sectional view (A) and a rear view (B) showing the knob of FIG. 1;

FIG. 5 is a sectional view (A) and a rear view (B) showing the bush of FIG. 1;

FIG. 6 is a sectional view (A, partially shown in section) and a rear view (B) showing the joint of FIG. 1;

FIG. 7 is a perspective view showing an appearance of the shuttle switch of FIG. 1;

FIG. 8 is a schematic front view of a conventional general electronic instrument operating device viewed from an operating surface side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 13 Display cover sheet 3 Operation key mark 5, 7 Display part 9 Case 11 Front panel 11a Support piece 11b, 35a, 35d Depression 11c, 11d hole 11e Support hole 11f Lock hole 13a, 15a Through-hole 15 Operation circuit board 17a, 17b Display electronic component (operating electronic component) 19 Push button switch (operating electronic component) 21 Auxiliary circuit board 23 L-shaped bracket 25, 27, 29 Main circuit board 31 Shuttle switch (electronic component with operating rotary shaft) 31a Switch body 31b Terminal 31c Operation rotating shaft 31d Engagement groove 33 Bush 33a Flange 33b Hollow part 35 Knob 35b Insertion hole 35c Screw hole 35e Display plate 37 Joint 37a Connection shaft 37b Base 37c Annular groove 37d Insertion 37e Slit 37f Convex part 37g Groove 37 Engaging portion 39 O-ring

Claims (1)

(57) [Scope of request for utility model registration] 1. A box-shaped case, a front panel for closing a front side opening of the case, and a rear panel behind the front panel, which is disposed in the case and used for operations from the front panel. An electronic instrument comprising: an operation circuit board on which an operation electronic component is disposed; and an auxiliary circuit board, which is disposed in the case behind the operation circuit board and in which an electronic component with an operation rotary shaft is disposed. An electronic instrument, characterized in that a knob is directly or indirectly connected to the operation rotary shaft through at least the front panel and an operation circuit board from the front side of the front panel. Operating device.