JP3196289B2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic apparatus such as an electronic still camera having a power dial.

[0002]

2. Description of the Related Art An electronic still camera for recording a still image signal of the NTSC system on a small magnetic disk and reproducing the still image signal from the magnetic disk has been put to practical use. The electronic still camera is provided with a power dial for controlling white balance, exposure correction, and the like. FIG. 8 is a perspective view when the power dial base is attached to the cabinet.

[0003] In FIG. 8, an upper cabinet 101 is provided with a mounting hole 103 adapted to the shape of a power dial. A vertical wall (hereinafter referred to as a barbette) 105 is provided along the outer periphery of the mounting hole 103 in a direction perpendicular to the upper cabinet 101. The barbet 105
It is divided into two parts by a pair of screwing ears 107 facing each other. A dial base 109 serving as a rotary bearing of the power dial is screwed into the mounting hole 103 from above. That is, the dial base 109 is provided with an ear 111 for screwing, and the ear 113 of the dial base 109 is screwed to the ear 107 of the upper cabinet 101 with the screw 113. On the upper cabinet 101 and the dial base 109, components for power dial (power dial main body, power click plate, etc.) are individually attached. In the case of such a configuration, the dial base 109 is attached to the upper cabinet 1 for dimensional accuracy.
It is not possible to mold integrally with 01.

FIG. 9 is a sectional view showing a case where the assembled power dial 115 is inserted into the upper cabinet 101 from above. In FIG. 9, the retaining member 117 is fixed to the upper cabinet 1 by a screw 113.
01 is attached to the power dial 115 from the back side. By doing so, the power dial 115 is fixed to the upper cabinet 101.

[0005]

An electronic still camera equipped with a power dial as shown in FIG. 8 has the following disadvantages. That is, since the power dial is not assembled, it takes time to replace a defective part, for example. Further, since the barbed 105 of the upper cabinet 101 is divided, it is difficult to prevent entry of water, dust, and the like. Further, due to the division of the barbet 105, the formation of the ears 107, and the like, the shape becomes complicated, it is difficult to obtain dimensional accuracy, and the production of a mold is costly.
Further, many screws (not shown) are required to attach the power dial. This complicates the manufacturing process and increases the weight.

On the other hand, when a power dial assembled as shown in FIG. 9 is attached, screwing is required. The retaining member to be screwed is
Must be sheet metal or molded parts of the correct dimensions.

Accordingly, an object of the present invention is to provide an electronic device such as an electronic still camera having a power dial which can be attached to a cabinet with a minimum number of screws and which can be waterproof and dustproof. It is to be.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a housing provided in a housing.
A cylindrical barbet formed and a first diameter,
The cylindrical part fitted inside the barbed and near the lower end of the cylindrical part
An operating portion having a concave portion formed with a second diameter smaller than the first diameter provided on the third member; and a third portion having a smaller diameter than the second diameter.
And an annular elastic member having a diameter of, the Babetto
After inserting the cylindrical part of the operation part, the elastic member is
The electronic device is characterized in that the operation unit is attached to the housing.

[0009]

After the power dial is fitted into the mounting hole and the barbed, the power dial is prevented from being detached from the cabinet by using a round belt from the back side of the cabinet.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a top view of an electronic still camera to which the present invention is applied. On one end side of the upper cabinet 3 of the electronic still camera 1, an operation button 5, an operation dial 7, a display window 9, and the like are provided. On the other end side, a mounting hole 11 and a barbed 14 for loosely fitting a power dial described later are provided. Barbet 14
Is not a divided barbet as in the related art, but a single circular barbet. A recess 12 is provided in a part of the top surface of the barbed 14. The power dial 1 fitted to the barbed 14 is
7 are fitted, and the position of the power dial 17 is set. Further, an accessory shoe 13 for attaching a strobe or the like to the electronic still camera 1 is provided substantially in the middle of the upper cabinet 3. A white balance window 15 is provided at the tip of the accessory shoe 13 in the extension direction.
Is arranged.

FIG. 2 shows a mounting hole 1 of the upper cabinet 3.
1 and a top view of an assembled power dial 17 loosely fitted to the barbet 14 is shown. 2, the power dial 17 includes a power dial unit 23 and a mode dial unit 25. Also power dial
The outer periphery of the portion 23 is made uneven, and a part thereof is protruded.
And a knob portion 19 is formed. By operating the knob 19, the function of the power dial 17 is changed. The power dial unit 23 is provided with control positions such as standby and video output. The mode dial 25 has an exposure correction, an EV correction,
Control positions for switching between field / frame shooting and the like are prepared.

FIGS. 3 and 4 are sectional views of the power dial 17 described above. 3, a power dial 17 includes a power dial base 21, a power dial unit 23, a mode dial unit 25, and an unlock button 2.
7, the lock button base 29 and the like.

The power dial base 21 is a portion fixed to the upper cabinet 3 and serves as a holding member and a rotation guide member for the entire power dial. The lower surface is provided with a cylindrical surface a having a concave shape.
The diameter of the cylindrical surface a is smaller than the diameter of the power dial base 21 itself. On the upper side of the power dial base 21, a protrusion d is provided perpendicular to the cylindrical surface a and in the outer peripheral direction. A corner b is provided in a part of the cylindrical surface a. On the other hand, the lower side is in contact with the power click plate 35. The dial lock pin 31 incorporated in the power dial base 21 includes a coil spring 33
Urged upward.

On the other hand, a power dial portion 23 is disposed in contact with the uppermost portion of the power dial base 21. By rotating the knob 19 of the power dial 23 by a certain angle, the control position is changed. After the power dial portion 23 is placed on the upper side of the power dial base 21, the power click plate 35 is screwed to the power dial portion 23 with a screw 36 so that the power dial portion 23 is not detached from the power dial base 21. Is held rotatably.

A hole (not shown) is provided in the power click plate 35 in a plane corresponding to each position of the power dial portion 23, and this hole is formed by a rotary encoder (not shown). A control signal corresponding to each position of the power dial is generated by engaging with the shaft. In addition, grooves are provided on the surface of the power dial 23 that abuts against the dial lock pin 31 so as to fit the dial lock pin 31 at each position of the power dial portion 23. With this groove, the power dial 23
Locked at each control position to prevent unnecessary rotation. When the lock release button 27 is pressed, the lock by the dial lock pin 31 can be released. That is, unlock button 2
The power dial 23 can be turned to a mode position other than the current position while pressing the button 7.

The power dial base 21 rotatably holds the mode dial portion 25 and the lock button base 29. The mode dial section 25 and the lock button base 29 are provided with the lock release button 27 and the coil spring 3.
7 are held together by screws 39 while being held therebetween. After this integrated component is inserted into the power dial base 21 from above, the mode click plate 41 is screwed to prevent the integrated component from being detached from the power dial base 21.

On the upper surface of the mode click plate 41, holes (not shown) are provided corresponding to each position of the mode dial 25. This hole engages with the shaft of a rotary encoder (not shown), and the mode dial 25
The control signal corresponding to each control position is generated. Each control position of the mode dial unit 25 does not have a lock mechanism like the power dial unit 23 described above, and has a structure that only generates a click at each position. When the mode dial portion 25 is rotated to each control position, the steel ball 43 in contact with the upper surface of the mode click plate 41 is fitted into the hole provided in the mode click plate 41 by the bias of the spring 45. . Therefore, a click is given to the mode dial unit 25 and the mode click plate 41.

FIG. 4 shows a state in which a round belt 47 is fitted between the power dial base 21 and the barbed 14. The inner diameter of the round belt 47 is smaller than the diameter of the cylindrical surface a of the power dial base 21 and a belt that generates an appropriate tension is used. The round belt 47
Is used in a circular shape as shown in FIG. 5, and is formed of, for example, ethylene-propylene rubber. In FIG. 4, the round belt 47 is elastically deformed and held by the cylindrical surface a and the corner b of the power dial base 21 and the peripheral slope c formed below the barbed 14. Round belt 47
, The power dial 17 is urged downward. However, the protruding portion d of the power dial base 21 abuts on the top surface of the barbed 14, and this pulling force is suppressed, so that the entire power dial 17 is in a stable state. In addition,
Due to the peripheral slope c, the round belt is easily fitted, and
The state of the round belt after fitting is easily stabilized.

The strength of the power dial 17 in the pulling-out direction is 98 N or more of the actually measured pulling-out force, and the present invention has a sufficient strength as a dial fastening method for such an application. In particular, when the power dial 17 has a shape as shown in FIG. 3 and there is no means for pulling from the outside, there is no problem at all. Further, since the round belt 47 is elastically deformed and is closely contacted with the cylindrical surface a and the peripheral slope portion c without any gap, even if water droplets and dust enter beyond the barbed 14, it is completely shut off by the round belt 47. Is done.

When the power dial 17 is mounted on the barbed 14 using the round belt 47 described above, the power dial 17 is inserted into the mounting hole 11 from above with respect to the upper cabinet 3, and the position is set using the recess 12. After performing, the state is maintained. The round belt 47 is fitted to the cylindrical surface a of the power dial base 21 while slightly expanding the round belt 47 in the diameter direction from the back surface of the upper cabinet 3.
At this point, the attachment of the round belt 47 is completed.
The work of inserting the round belt 47 is completed by, for example, using tweezers, hooking the round belt 47 at an arbitrary position on the power dial 17, and gradually turning the round belt 47 by 360 ° while slightly expanding the round belt 47. It is said.

As described above, the power dial 17 can be easily attached using the round belt 47. By the way, the variation of the tension caused by the fitting operation remains in each part in the circumferential direction of the round belt 47 after the fitting, but the imbalance of the tension has no adverse effect on the mounting strength of the power dial 17. Do not give.

6A to 6E show a modified example of a sectional view of a cylindrical surface portion into which the round belt 47 is fitted. The cylindrical portion does not necessarily have to be circular, as in the above-described embodiment, but may be triangular, square, pentagonal, hexagonal, elliptical, or the like. In the case of a square shape, by forming an appropriate corner R at the corner, the adhesion between the round belt and the cylindrical surface is strengthened, and waterproof / dustproof is effectively achieved.

FIG. 7 shows a modification of the belt related to the shape of the cylindrical portion in FIG. The shape of the belt in FIG. 7 relates to, for example, the shape of the cylindrical surface portion in FIG. 6A. That is,
Even if a belt having the same shape as the cylindrical surface portion is used instead of the round belt, the same effect as the above-described round belt can be obtained.

In the embodiment of the present invention, the description has been made by using the power dial of the electronic still camera. However, the present invention is not limited to this, and may be applied to general electronic equipment. Is done.

[0025]

According to the present invention, the power dial can be assembled and attached to the cabinet with a minimum number of screws, so that a defective product can be found in the previous stage, the number of assembling steps and the cost can be reduced. During maintenance, the assembly can be replaced and repaired in a short time. In addition, since the belt is a round belt, it is possible to reduce material costs for parts that are relatively inexpensive and have low dimensional accuracy. Furthermore, since the shape of the mounting holes in the upper cabinet is a simple circle, it is possible to reduce the cost of the mold and to reduce the occurrence of defective parts. Furthermore, since the barbet is not divided, waterproofing and dustproofing become possible, and since the round belt is in close contact,
Waterproofing and dustproofing are possible even for water and dust that have invaded beyond the barbet.

[Brief description of the drawings]

FIG. 1 is a top view of an electronic still camera to which the present invention is applied.

FIG. 2 is a top view of the power dial.

FIG. 3 is a detailed cross-sectional view when a power dial is mounted on an upper cabinet.

FIG. 4 is a cross-sectional view of the power dial showing a state where the round belt is fitted.

FIG. 5 is a diagram showing an example of a usable round belt.

FIG. 6 is a cross-sectional view of a modified example of a cylindrical portion into which a round belt is fitted.

FIG. 7 is a diagram showing a modification of the belt.

FIG. 8 is a diagram used for explaining a conventional technique.

FIG. 9 is a diagram used for explaining a conventional technique.

[Explanation of symbols]

 14 Barbet 17 Power dial 21 Power dial base 23 Power dial section 25 Mode dial section 47 Round belt

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05K 7/12 H04N 5/225

Claims (1)

(57) [Claims] 1. A cylindrical barbed provided in a housing.
When being formed of a first diameter, match fitting inside said Babetto
Cylindrical part and the first part provided near the lower end of the cylindrical part .
Comprising of an operation portion having a recess formed in a diameter smaller than the second diameter, and an annular elastic-<br/> member having the second diameter is smaller than the third diameter, the operation in the Babetto After inserting the cylindrical part of the
An electronic device, wherein the operation member is attached to the housing by engaging the elastic member with the recess .