JP3884308B2 - Rotating lever holding mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a holding mechanism that holds a rotating lever that switches a number of functions of a digital camera, for example.
[0002]
[Prior art]
A rotating lever mechanism is used to switch functions such as power on / off, viewfinder operation, shooting position operation, setup, manual shooting, automatic shooting, image confirmation, print execution, etc. Yes. Conventionally, the holding mechanism for holding the rotating lever is composed of a large number of components, and the number of components is very large. For example, in Japanese Patent Laid-Open No. 2000-331666, there is a rotary lever holding mechanism 70 having a complicated structure including a plurality of sliders 71, a large number of rotary operation bodies 72, a plurality of operation units 73 and the like as shown in FIG. It is shown.
[0003]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary lever holding mechanism that is simple and easy to assemble with a small number of components.
[0004]
[Means for Solving the Problems]
The present invention is a rotating lever holding mechanism comprising the following (A), (B), (C), and (D).
[0005]
(A) A circumferential rib wall protrudes from the inner peripheral surface of the through-circular hole provided in the main body housing to the inner diameter side, and the rib wall has two arc-shaped defective portions, one rectangular defective portion, (B) A flexible bushing comprising a thin-walled cylinder and having an outer diameter of the body portion fitted into the circumferential rib wall. and fins 該欠loss part the same shape that passes through the defect in the vertical, and a locking projection which fits into said rectangular defect in passing the different positions phases of fin barrel lower end periphery, said circular bore circumference A bush having a flange having an outer diameter that fits loosely on the outer periphery of the upper end of the body part. (C) A rotating lever having a cylinder that fits to the inner diameter of the bush. (D) An operation plate attached to the bottom surface of the rotating lever. The flange has a fin directly above the fin. When provided with a substantially defect isomorphic, above the lock projection may be provided with arcuate oblong opening to impart radial flexibility of the body portion. The missing part provided in the upper flange of the same shape as the fin is such that the fin can be visually observed when the bush is mounted in the hole of the housing, and the mounting workability is improved. The lock protrusion is a protrusion protruding radially outward from the outer periphery of the lower end of the body portion of the bush. The lock protrusion is fitted into the rectangular defect provided in the hole of the main body housing of (A), and the bush is firmly fitted in the hole of the housing. It is something to fix. The lock protrusion is fitted into the rectangular defect portion at a position that is different in phase from the position where the fin passes through the strip-shaped defect portion of the main body housing. That is, after the fin is passed from the top to the bottom through the strip-shaped defect portion, the lock protrusion is fitted into the rectangular defect portion when the bush is rotated. The phase difference means that the central angle between the arc-shaped strip-shaped missing portion and the rectangular missing portion in the hole of the main body housing in (A) is different from the central angle between the fin and the locking projection in the bush in (B). It is that.
[0006]
In the structure of the present invention, the bush of (B) is inserted from above into the hole of (A) with the position of the fin aligned with the arcuate strip-shaped defect, and then the bush is slightly rotated to When the locking protrusion is aligned with the rectangular defect, the bush is fixed in the hole of the housing (A). When the bushing is rotated until the locking protrusion of the bushing matches the rectangular defect of the hole in the housing, the locking protrusion moves along the inner periphery of the hole in the housing. At this time, the body portion of the bush provided with the lock protrusion is deformed radially inward because the lock protrusion protrudes. The arc-shaped oval defect provided in the upper flange of the bush reduces the rigidity against deformation in which the body portion contracts in the radial direction, thereby facilitating the deformation. After the bush is fixed in the housing hole, the cylinder of the rotating lever (C) is inserted into the inner diameter of the bush, and the assembly (D) is attached to the bottom surface of the cylinder.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows an assembled cross-sectional view of the rotary lever mechanism of the present invention. A bush 30 is fitted into the hole 11 of the main body housing 10, and the cylindrical portion 21 of the rotary lever 20 is inserted into the inner diameter of the bush 30. An operation plate 50 is attached to the lower surface.
[0008]
FIG. 1 shows an exploded view of the rotary lever holding mechanism of the embodiment of the present invention. FIG. 1 (a) is a plan view of the hole 11 portion of the main body housing 10, and FIG. 1 (b). FIG. 1C is a plan view of the bush 30, and FIG. 1D is a plan view of the operation plate 50. FIG. 2 is a side view of the bush 30. 3 is an end view taken along the line AA of FIG. 2, showing only the upper surface of the bush 30 and saving the illustration of the lower surface side. FIG. 4 is a view showing the shape of the lower end side of the body portion of the bush 30 in the view taken along the line BB in FIG.
[0009]
As shown in FIG. 1 (a), a through circular hole 11 provided in the main body housing 10 projects a circumferential rib wall 13 from the inner peripheral surface 12 to the inner diameter side, and this circumferential rib wall 13 has an inner diameter. It has a substantially circular inner peripheral surface 14. The circumferential rib wall 13 is provided with two arc-shaped deficient portions 15 and 16 that are substantially opposed to each other. The deficient portions 15 and 16 are provided at substantially opposing positions, that is, at positions separated by about 150 to 180 degrees at the central angle. The arc-shaped strip-shaped defect portions 15 and 16 do not have to have the same shape. In addition, one rectangular defect portion 17 is provided at a position separated from the arc-shaped strip-shaped defect portion 15 by a central angle of about 90 degrees. A protruding string portion 18 is provided in a portion adjacent to the rectangular defect portion.
[0010]
A rotating lever 20 shown in FIG. 1B includes a shutter button 23 in the center, a ring-shaped rotating portion 22 around the shutter button 23, and is rotated by a lever operating portion 24 to be adjusted to various operation modes. Is forming. As shown in FIG. 5, the lower cylinder 21 of the rotating portion 22 passes through the bush 30, and the operation plate 50 shown in FIG. The operation plate 50 includes rotary lever positioning holes 51, 52, 53, 55 and a power switch engaging claw 54, and acts as a multipurpose switch corresponding to various functions.
[0011]
As shown in FIG. 4, the bush 30 includes two fins 41 and 42 projecting radially outward at the lower end of a body portion 31 made of a thin cylinder, and projects a lock projection 43 separately. The two fins 41 and 42 are provided at positions separated by 150 to 180 degrees at the central angle, and correspond to the arc-shaped strip-shaped missing portions 15 and 16. The two fins 41, 42 have a slightly smaller profile size than these defects 15, 16 and pass through these defects 15, 16 from top to bottom. Further, a lock projection 43 is provided at the lower end of the body portion 31 so as to protrude in the outer peripheral direction. The lock protrusion 43 is provided to be separated from the fin 41 by a central angle 44. The central angle 44 is formed to be larger than the size of the central angle 19 formed by the strip-shaped defect portion 15 and the rectangular defect portion 17 shown in FIG.
[0012]
As shown in FIG. 3, a flange 35 is provided at the upper end portion of the body portion 31 of the bush 30. The flange 35 is loosely fitted into the inner diameter 12 of the hole 11 of the main body housing shown in FIG. 1 and is attached to the outer periphery of the top end of the body portion 31 of the bush 30. The flange 35 is provided with missing portions 36 and 37 immediately above the fins 41 and 42 at the lower end so that the fins 41 and 42 can be seen from above when the bush 30 is attached. In addition, a large arc-shaped opening 38 is provided in the flange on the side where the lock protrusion 43 is provided at the lower end of the body portion 31 of the bush 30. The opening 38 cuts out the flange 35 to facilitate the reduction of the barrel 31 in the radial direction before the lock projection 43 is fitted into the rectangular recess 17 of the housing hole. The rigidity of this is reduced. Further, a protrusion 39 is provided on the upper surface of the flange 35. The protrusion 39 is a stopper that the rotary lever 20 is locked at a specific position.
[0013]
In order to assemble the rotary lever holding mechanism of the present invention, the fins 41 and 42 of the bush 30 are pushed into the hole 11 from above according to the positions of the rectangular defects 15 and 16 of the hole 11 of the main body housing 10, When 42 is positioned on the lower surface side of the hole 11 and the bush 30 is slightly rotated in the circumferential direction, the fins 41 and 42 are moved from the rectangular defect portions 15 and 16 and the lower surface of the circumferential rib wall 13 of the hole 11. , The lock projection 43 fits into the rectangular defect 17, and the bush 30 is tightly fixed in the hole 11.
[0014]
Next, the cylinder 21 of the rotary lever 20 is inserted into the bush 30 from above, and the operation plate 50 is attached to the bottom surface thereof.
[0015]
As described above, the rotary lever 20 can be easily and accurately positioned and assembled.
[0016]
【The invention's effect】
Since the rotating lever holding mechanism of the present invention is configured as described above, the structure is simple, the assembly is easy, and the contribution is large with a small number of components.
[Brief description of the drawings]
FIG. 1 is an exploded view of a rotary lever holding mechanism of an embodiment.
FIG. 2 is a side view of the bush of the embodiment.
FIG. 3 is an end view taken along the line AA in FIG. 2;
4 is a BB arrow view of FIG. 2;
FIG. 5 is an assembly cross-sectional view of the rotary lever holding mechanism of the embodiment.
FIG. 6 is a cross-sectional view of the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Main body housing 11 Hole 12 Inner peripheral surface 13 Circumferential rib wall 14 Inner peripheral surface 15, 16 Strip-shaped defect | deletion part 17 Rectangular defect | deletion part 18 String part 19 Center angle | corner 20 Rotation lever 21 Column part 22 Rotation part 23 Release button 24 Lever operation section 30 Bush 31 Body 35 Flange 36, 37 Deletion section 38 Opening 39 Projection 41, 42 Fin 43 Lock projection 44 Center angle 50 Operation plate 51, 52, 53 Rotating lever positioning hole 54 Power switch engaging claw 70 Rotating lever holding mechanism 71 Slider 72 Rotating operation body 73 Operation unit

Claims (2)

A rotating lever holding mechanism comprising the following (A), (B), (C) and (D).
(A) A circumferential rib wall protrudes from the inner peripheral surface of the through-circular hole provided in the main body housing to the inner diameter side, and the rib wall has two arc-shaped defective portions, one rectangular defective portion, (B) A flexible bushing comprising a thin-walled cylinder and having an outer diameter of the body portion fitted into the circumferential rib wall. and fins 該欠loss part the same shape that passes through the defect in the vertical, and a locking projection which fits into said rectangular defect in passing the different positions phases of fin barrel lower end periphery, said circular bore circumference A bush having a flange having an outer diameter that fits loosely on the outer periphery of the upper end of the body portion. (C) A rotary lever having a cylinder fitted to the inner diameter of the bush. (D) An operation plate attached to the bottom surface of the rotary lever.   The flange is provided with a defect portion substantially the same shape as the fin immediately above the fin, and an arc ellipse opening is provided above the lock projection to provide flexibility in the radial direction of the body portion. The rotating lever holding mechanism according to claim 1.

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