JPH09113659A - Electronic device dial structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fingers operating a rotation operation part from touching to a dial part and prevent the destruction of inner circuits due to static electricity by projecting the dial gauge part of a setting dial inside a window part and a part of the dial rotation operation part outside an opening part. SOLUTION: In a decorative sheet 7 attached on the front end surface of a case 6, an opening 8 and a window part 9 are provided, the dial gauge part 16 of a setting dial is arranged inside the window part 9, and a part of a dial rotation operation part 18 is projected outside the opening 8 in the arrangement. The gauge part 16 is arranged inside the transparent window part 9 and covered by the window part 9 in this manner and so the fingers operating the rotation operation part 18 never directly touch the gauge part 16. Thus, the destruction of inside circuit due to the invasion of static electricity is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dial structure for electronic equipment such as an analog timer device.

[0002]

2. Description of the Related Art A conventional analog timer device is shown in FIG.
As shown in FIG. 11, an opaque case 30 is provided,
The front surface 30A of the case 30 has a setting dial 31
An opening 32 for exposing the graduation portion, an opening 33 for protruding the rotary operation portion of the setting dial 31, and two LED window holes 34 are formed.

A case 30 is provided in the opening 32.
Dial scale part 3 of the setting dial 31 housed inside
5 is exposed, and the rotary operation portion 36 of the setting dial 31 projects from the opening portion 32 for exposing the scale portion.
Then, the decorative sheet 37 is provided on the front surface portion 30A of the case 30.
Is affixed. Portions corresponding to the openings 32 and 33 are cut out in the decorative sheet 37, and
The decorative sheet 37 has the LED window hole 34 of the opening 32.
The portion corresponding to is a transparent window portion 38. Then, a positioning mark 39 of the setting dial 31 is printed on the decorative sheet 37.

[0004]

However, in the dial structure of the conventional analog timer device described above, since the dial scale portion 35 of the setting dial 31 is exposed in the opening 32 of the case 30, There is a problem in that static electricity enters and destroys the internal circuit when the fingertip for operating the rotary operation part 36 of the setting dial 31 directly touches the dial graduation part 35. Since the mark 39 was printed on the decorative sheet 37, the attaching accuracy of the decorative sheet 37,
The position (location) of the alignment is shifted due to the printing accuracy,
There is a problem that it causes variation in accuracy of setting time. Further, a transparent window portion 38 is provided on the decorative sheet 37,
In addition, it is necessary to print the positioning mark 39 of the setting dial 31, which causes a problem that the cost of the decorative sheet 37 increases.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent the fingertips operating the rotary operation portion of the setting dial from directly touching the dial scale portion. An object of the present invention is to provide a dial structure of an electronic device that can prevent the internal circuit from being damaged by static electricity.

[0006]

In order to achieve the above object, a dial structure of an electronic device according to the invention of claim 1 is provided with an end face portion of a transparent case and a window portion as a part of the end face portion. And an opening portion, the dial graduation portion of the setting dial is located inside the window portion, and a part of the dial rotation operation portion of the setting dial is projected outward from the opening portion. Is characterized by.

Therefore, since the dial graduation portion of the setting dial is located inside the transparent window portion and the dial graduation portion is covered with the window portion, the fingertip for operating the rotary operation portion of the setting dial is provided. Eliminates the problem of static electricity invading and destroying internal circuits without directly touching the dial scale.

In order to achieve the above object, a dial structure for an electronic device according to a second aspect of the present invention is the dial structure for an electronic device according to the first aspect, wherein the window portion and the end face portion of the case are provided. A part of the dial is curved outwardly in a mountain shape, and an alignment mark for aligning the scale of the dial scale is provided on the top of the curved surface.

Therefore, not only the same operation as the operation of the invention of claim 1 described above can be achieved, but also by rotating the setting dial to align a predetermined scale with the alignment mark of the window portion, the built-in timer can be operated. To set the time, it is not necessary to print the alignment mark of the setting dial on the decorative sheet, and the position (location) of the alignment will shift depending on the accuracy of this decorative sheet attachment and the accuracy of the printing. This eliminates the problem of causing variations in.

In order to achieve the above object, the dial structure of an electronic device according to a third aspect of the present invention is the dial structure of an electronic device according to the first or second aspect, in which an end face portion of the case is provided. The decorative sheet to be attached was provided with an opening window portion through which the above-mentioned end face portion can be seen and the LED inside can be seen through.

Therefore, not only can the same effects as those of the above-mentioned invention of the first aspect be exerted, but also the internal L-shape can be penetrated from the opening window of the decorative sheet through the end face of the transparent case.
Since the ED light can be seen, it is not necessary to form a transparent window portion on the decorative sheet, and only the window portion for seeing the LED light needs to be pressed, so that the cost of the decorative sheet can be reduced.

In order to achieve the above object, the dial structure of the electronic device according to the invention of claim 4 is the dial structure of the electronic device according to claim 1, claim 2 or claim 3, wherein the window is A stopper, which abuts against the setting dial and restricts the rotation range of the setting dial, is provided at a position on the back surface of the portion that corresponds to the alignment mark.

Therefore, not only can the same effects as those of the above-mentioned invention of the first aspect be exhibited, but also the stopper can be seen through the window portion, and the stopper is provided with a predetermined scale of the setting dial. It becomes a mark to align with the alignment mark of, and this alignment can be facilitated.

In order to achieve the above-mentioned object, the dial structure of the electronic device according to the invention of claim 5 is the dial structure of the electronic device according to claim 1 or claim 2 or claim 3 or claim 4. In, the case is a case of the timer device.

Therefore, not only the same operation as the operation of the invention of claim 1 described above can be achieved, but also the invention is applied to the dial structure of the timer device in claim 1 or claim 2 or claim 3 or claim 4. be able to.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of an electronic device having a dial structure according to the present invention, FIG. 2 is a plan view of the electronic device, FIG. 3 is an exploded perspective view of the electronic device, and FIG. 4 is a case and a decorative plate of the electronic device. It is a perspective view of the disassembled state of FIG.

The timer device as an electronic device has a base 1
A base board 2 mounted on the base 1, a relay 3 and a control board 4 mounted on the base board 2, a setting dial 5 mounted on the control board 4, and detachable from the base 1. Case 6 fixed and this case 6
And a decorative sheet 7 attached to the upper surface of the.

As shown in FIGS. 4 to 6, the case 6 has upper and lower surface portions 6A and 6B and left and right surface portions 6C and 6C.
The housing 6 has a front surface 6E and a front end 6E, and the rear surface is open. The case 6 is made of transparent synthetic resin.
The front end face portion 6E is formed with an opening 8 vertically elongated toward the right face portion 6D, and the front end face portion 6E is formed with a window portion 9 located at the center thereof. There is. This window portion 9 is formed by curving a part of the front end surface portion 6E in a mountain shape in the up and down direction toward the front, and extends along the left and right direction as a positioning mark at the top of the curved surface curved in a mountain shape. The groove portion 10 is formed. Further, a stopper 11 is provided on the back surface of the window portion 9 so as to project toward the left surface portion 6C side of the case 6 directly below the groove portion 10 and project downward. Further, as the alignment mark, the groove portion 10
However, the projections may extend along the left-right direction.

Substrate holding grooves 12A are formed in the front-rear direction on the inner surfaces of the upper and lower surface portions 6A and 6B of the case 6, and engaging holes 12B are formed in the lower portions of the left and right surface portions 6C and 6D. I am doing it.

The setting dial 5 is provided with a cylindrical dial body 13 as shown in FIGS. 7 to 9, and a scale 14 and a numerical value 15 are provided on the outer peripheral surface of the dial body 13.
And a dial graduation portion 16 is formed. Further, a large number of teeth 17 are integrally formed at the outer end of the dial body 13 in the circumferential direction at a predetermined pitch, and a dial rotation operation portion 18 is formed. The dial main body 13 has the other portion within the range of an angle of 55 degrees to the left and right of the straight line a passing through the rotation center P from the center O of the dial scale portion 16, and this portion is wider than the dial scale portion 16. The step portion between the wide portion 19 and the dial graduation portion 16 serves as a stopper contact portion 20. The center of the dial body 13 is the center of rotation P.

Portions corresponding to the opening 8 and the window 9 are cut out in the decorative sheet 7, and the portion of the decorative sheet 7 facing the LED inside the case is opened as the window 21. Has been done.

The setting dial 5 is rotatably attached to the control board 4 at its rotation center P, and the case 6 has a board holding groove 1 inside thereof.
The upper and lower edges of the base substrate 2 are inserted into 2A, and most of the relay 3, the control substrate 4, and the setting dial 5 mounted on the base substrate 2 are wrapped around the base 1. In the engaging hole 12B of the case 6,
Engagement protrusions 22 provided on the base 1 are engageably engaged.

In this case, the dial graduation portion 16 of the setting dial 5 is located inside the window portion 9, and a part of the dial rotation operation portion 18 projects forward from the opening portion 8. In addition, the stopper 11 of the case 6
Is in sliding contact with the edge portion 16a of the dial graduation portion 16.

A decorative sheet 7 is attached to the front end surface portion 6E of the case 6. In this case, the opening 8 and the window 9 are exposed from the cutout 7A of the decorative sheet 7, and the opening window 21 of the decorative sheet 7 is
The light of the internal LED can be seen through the transparent front end surface portion 6E of the case 6.

Therefore, by operating the rotating operation portion 18 of the setting dial 5 with a fingertip, the setting dial 5 is rotated to align the predetermined scale 14 with the groove portion 10 of the window portion 9, thereby setting the time of the built-in timer. Set.

When the setting dial 5 is rotated to the left or right, the stopper contact portion 2 of the setting dial 5 is rotated.
0 contacts the stopper 11, and the setting dial 5 does not rotate any further.

Since the dial graduation portion 16 of the setting dial 5 is located inside the transparent window portion 9 and the dial graduation portion 16 is covered by the window portion 9, the setting dial 5 rotates. The problem that the fingertips operating the operation unit 18 do not directly touch the dial scale 16 and static electricity invades to destroy the internal circuit is solved.

In order to set the time of the built-in timer by rotating the setting dial 5 and aligning a predetermined scale 14 with the groove 10 of the window 9, the setting dial 16 is set.
It is not necessary to print the registration mark on the decorative sheet 7, and the position (location) of the alignment is shifted depending on the attaching accuracy of the decorative sheet 7 and the printing accuracy, which causes variation in the accuracy of the set time. The problem goes away.

Further, the decorative sheet 7 has a window portion in which a portion facing the LED in the case 6 is opened, and the transparent front end surface portion 6E of the case 6 is penetrated through the opening window portion 21. Since the light of the LED inside can be seen, it is not necessary to form a transparent window portion on the decorative sheet 7, and only the window portion for seeing the LED light needs to be pressed, so that the cost of the decorative sheet 7 can be reduced. It will be possible.

Further, the stopper 11 is provided with the window 9
It is possible to see this stopper 11 through the window portion 9 because it is provided on the back surface of the device, just below the groove portion 10, and the stopper 11 is provided with the predetermined scale 14 of the setting dial 5 and the window portion 9. It serves as a mark for aligning with the groove portion 10 of, and this alignment can be facilitated.

[0030]

As described above, according to the dial structure of the electronic device according to the first aspect of the invention, the transparent case has the end face portion, the window portion as a part of the end face portion, and the opening portion. By setting the dial graduation portion of the setting dial inside the window and projecting part of the dial rotation operation portion of the setting dial outward from the opening, Since the dial graduation part of is located inside the transparent window part and the dial graduation part is covered with the window part, the fingertips operating the rotary operation part of the setting dial should touch the dial graduation part directly. This eliminates the problem that static electricity enters and destroys internal circuits.

According to the dial structure of an electronic device according to the invention of claim 2, in the dial structure of the electronic device according to claim 1, the window part and a part of the end face part of the case are outwardly directed. In addition to having the same effect as the effect of the invention of claim 1 described above, the setting dial can be rotated by forming it in the shape of a mountain curve toward the top and providing the alignment mark on the top of this curved surface. By aligning the predetermined scale with the alignment mark on the window to set the time of the built-in timer, it is not necessary to print the alignment mark on the setting dial on the decorative sheet. The problem that the alignment position (location) is shifted depending on the precision and the printing precision, which causes a variation in the precision of the set time, is solved.

The dial structure for an electronic device according to a third aspect of the present invention is the dial structure for an electronic device according to the first or second aspect, wherein the decorative sheet attached to the end face of the case is By providing the opening window portion through which the internal LED can be seen through the end face portion, not only the same effect as the effect of the invention of claim 1 described above can be obtained, but also the opening window portion of the decorative sheet is transparent. Since the light of the internal LED can be seen through the end surface of the case, it is not necessary to make a transparent window on the decorative sheet, and only the window for seeing the LED light needs to be pressed. The cost of the decorative sheet can be reduced.

According to the dial structure of the electronic device according to the invention of claim 4, in the dial structure of the electronic device according to claim 1, claim 2 or claim 3, the position of the back surface of the window is By providing a stopper that abuts against the setting dial and restricts the rotation range of the setting dial at a position corresponding to the alignment mark, the same effect as the effect of the invention of claim 1 can be obtained. Alternatively, the stopper can be seen through the window, and this stopper serves as a mark for aligning the predetermined scale of the setting dial with the alignment mark of the window, facilitating this alignment. it can

According to a fifth aspect of the present invention, there is provided a dial structure for an electronic device according to any one of the first, second, third or fourth dial structures for an electronic device, wherein the case is a case of a timer device. By so doing, not only the same effects as the effects of the invention of claim 1 described above can be obtained, but also claim 1 or claim 2 or claim 3 or claim 4
The invention can be applied to the dial structure of the timer device.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electronic device including a dial structure according to the present invention.

FIG. 2 is a plan view of the electronic device.

FIG. 3 is an exploded perspective view of the electronic device.

FIG. 4 is a perspective view of a disassembled state of a case and a decorative plate of the electronic device.

FIG. 5 (1) is a front view of the case of the electronic device.
(2) is a partially broken side view of the case. (3)
FIG. 4 is a rear view of the case.

6 is a sectional view taken along the line AA of (2) in FIG.

FIG. 7 is a plan view of a setting dial of the electronic device.

FIG. 8 is a rear view of the setting dial.

FIG. 9 is a sectional view taken along line BB of FIG. 8;

FIG. 10 is a front view of an electronic device having a conventional dial structure.

FIG. 11 is a perspective view of an electronic device case and a decorative plate in an exploded state.

[Explanation of symbols]

 5 Setting dial 6 Case 6E Front end face part (end face part) 8 Opening part 9 Window part (positioning mark) 16 Dial scale part 18 Dial rotation operation part

Claims (5)

[Claims] 1. A transparent case has an end surface portion provided with a window portion as a part of the end surface portion and an opening so that a dial scale portion of a setting dial is located inside the window portion. A dial structure for an electronic device, wherein a part of a dial rotating operation portion of the setting dial is projected outward from the opening. 2. The window portion is formed by curving a part of the end surface portion of the case outwardly in a mountain shape, and a position for aligning the scale of the dial scale portion with the top of the curved surface. The dial structure for an electronic device according to claim 1, further comprising a registration mark. 3. The electronic device according to claim 1, wherein the decorative sheet attached to the end face of the case is provided with an opening window through which the internal LED can be seen through the end face. Dial structure. 4. A stopper provided in contact with a setting dial to restrict a rotation range of the setting dial, at a position corresponding to the alignment mark on the back surface of the window portion. Alternatively, the dial structure of the electronic device according to claim 3. 5. The dial structure for an electronic device according to claim 1, 2, 3 or 4, wherein the case is a case of a timer device.