Camera device and change-over switch

Abstract

The utility model provides a camera device and a change-over switch. The camera device has a lens for imaging a subject in an imaging area on a photograph film, and an aperture blade disposed in front of the lens. The aperture blade is configured so as to be capable of moving between an aperture position at which vignetting occurs in the peripheral edge of the imaging region and an open position outside the aperture position in the radial direction. The camera device further includes a change-over switch including an operating lever that can be moved by a user's operation, and an operating lever that is connected to the aperture blade and that moves the aperture blade between the aperture position and the open position in accordance with the movement of the operating lever. The operating lever is configured so as to be capable of moving in the circumferential direction about an optical axis, and the operating lever is configured so as to be capable of rotating about the axis. A cam groove extending in a circumferential direction between an inner side portion and an outer side portion is formed in the operating lever. The operating lever includes a driven portion capable of moving within the cam groove while engaging with the cam groove.

Description

Technical Field

[0001] The present utility model relates to a camera device. Background Art

[0002] Generally, most cameras are provided with an aperture for taking pictures in an optimal exposure state (see, for example, Patent Document 1). Conventionally, such an aperture is used to adjust the amount of light, and for example, it is not used to add aesthetic or artistic effects to the captured image. In the case of digital photos, it is also possible to add aesthetic or artistic effects to the image by correcting the data after shooting, but especially in the case of analog photos, such post-editing cannot be performed, so a technique for obtaining an image with added aesthetic or artistic effects is required.

[0003] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2016-133627 Summary of the Utility Model

[0004] The present utility model has been completed in view of such problems of the prior art, and an object thereof is to provide a camera device capable of easily taking an image with added aesthetic and / or artistic effects and a changeover switch for such a camera device.

[0005] According to a first aspect of the present utility model, there is provided a camera device capable of easily taking an image with added aesthetic and / or artistic effects. The camera device has at least one lens that forms an image of a subject on a photographic film in an imaging area and aperture blades disposed in front of the at least one lens. The at least one aperture blade is configured to be movable between an aperture position that causes vignetting at the peripheral portion of the imaging area and an open position that is radially outside the aperture position. The camera device further has a changeover switch that includes an operating lever that can be moved by a user's operation and a working lever connected to the at least one aperture blade, and the working lever moves the at least one aperture blade between the aperture position and the open position as the operating lever moves.

[0006] The camera device of the second mode of the present utility model is characterized in that, in the camera device of the first mode, the changeover switch further includes: a base; a cam mechanism that converts the movement of the operating lever into the rotation of the working lever, and the cam mechanism includes a cam groove provided on one of the operating lever and the working lever and a follower provided on the other of the operating lever and the working lever, and the follower can move in the cam groove while engaging with the cam groove; and a force application portion that applies a force to the follower of the cam mechanism. The operating lever of the changeover switch is configured to be movable circumferentially around a first axis on the base, the working lever of the changeover switch is configured to be rotatable around a second axis, at least one aperture blade is configured to be rotatable around a rotation axis, the cam groove of the cam mechanism includes an inner portion and an outer portion located radially outside the inner portion with respect to the first axis, and the cam groove extends along the circumferential direction between the inner portion and the outer portion. The follower of the cam mechanism can move between a first follower position located in the inner portion of the cam groove and a second follower position located in the outer portion of the cam groove. The force application portion is configured to: when the follower of the cam mechanism is located on the side closer to the first follower position than a reference follower position, press the follower toward the first follower position; and when the follower of the cam mechanism is located on the side closer to the second follower position than the reference follower position, press the follower toward the second follower position.

[0007] The camera device of the third mode of the present utility model is characterized in that, in the camera device of the second mode, the force application portion of the changeover switch includes: a contact configured to move along a third axis and contact the follower of the cam mechanism; and a biasing portion that biases the contact in the direction along the third axis.

[0008] The camera device of the fourth mode of the present utility model is characterized in that, in the camera device of the third mode, the cam groove of the changeover switch has the following shape: the relationship between the rotation angle of the working lever around the second axis and the movement distance of the contact along the third axis when the follower moves from the first follower position toward the reference follower position is the same as the relationship between the rotation angle of the working lever around the second axis and the movement distance of the contact along the third axis when the follower moves from the second follower position toward the reference follower position.

[0009] The camera device according to the fifth aspect of the present utility model is characterized in that, in the camera device according to the fourth aspect, the cam groove of the changeover switch includes: a first groove portion extending along a line connecting the inner portion and the outer portion; a second groove portion connected to the first groove portion and extending in a manner such that a change in the radial direction with respect to the circumferential direction is smaller than that of the first groove portion; and a third groove portion connected to the second groove portion and extending in a manner such that a change in the radial direction with respect to the circumferential direction is larger than that of the first groove portion and the second groove portion.

[0010] The camera device according to the sixth aspect of the present utility model is characterized in that, in the camera device according to the third aspect, the follower portion in the reference follower position is located on the third axis.

[0011] The camera device according to the seventh aspect of the present utility model is characterized in that, in the camera device according to the third aspect, the contact of the changeover switch has: a first contact portion that contacts the follower portion located on a side closer to the first follower position than the reference follower position; and a second contact portion that contacts the follower portion located on a side closer to the second follower position than the reference follower position, and the second contact portion has a shape symmetric to that of the first contact portion.

[0012] The camera device according to the eighth aspect of the present utility model is characterized in that, in the camera device according to the second aspect, the base portion of the changeover switch has a stopper portion that restricts the circumferential movement of the operating lever.

[0013] According to the ninth aspect of the present utility model, there is provided a changeover switch with a simple structure that can easily switch the switching state by moving an operating lever in the circumferential direction. The changeover switch includes: a base; an operating lever that can move in the circumferential direction around a first axis on the base; a working lever that can rotate around a second axis; and a cam mechanism that converts the movement of the operating lever into the rotation of the working lever. The cam mechanism includes: a cam groove provided in one of the operating lever and the working lever; and a follower provided in the other of the operating lever and the working lever, which can move in the cam groove while engaging with the cam groove. The changeover switch further has a force applying portion that applies a force to the follower of the cam mechanism. The cam groove of the cam mechanism includes an inner portion and an outer portion located radially outside the inner portion with respect to the first axis, and the cam groove extends along the circumferential direction between the inner portion and the outer portion. The follower of the cam mechanism can move between a first follower position located in the inner portion of the cam groove and a second follower position located in the outer portion of the cam groove. The force applying portion is configured to press the follower toward the first follower position when the follower of the cam mechanism is located on the side closer to the first follower position than a reference follower position, and to press the follower toward the second follower position when the follower of the cam mechanism is located on the side closer to the second follower position than the reference follower position.

[0014] The changeover switch according to the tenth aspect of the present utility model is characterized in that, in the changeover switch according to the ninth aspect, the force applying portion includes: a contact configured to move along a third axis and contact the follower of the cam mechanism; and a biasing portion that biases the contact in the direction along the third axis.

[0015] The changeover switch according to the eleventh aspect of the present utility model is characterized in that, in the changeover switch according to the tenth aspect, the cam groove of the cam mechanism has the following shape: the relationship between the rotation angle of the working lever around the second axis and the moving distance of the contact along the third axis when the follower moves from the first follower position toward the reference follower position is the same as the relationship between the rotation angle of the working lever around the second axis and the moving distance of the contact along the third axis when the follower moves from the second follower position toward the reference follower position.

[0016] The switching switch of the twelfth mode of the present utility model is characterized in that, in the switching switch of the eleventh mode, the cam groove of the cam mechanism includes: a first groove portion that extends along a line connecting the inner portion and the outer portion; a second groove portion that is connected to the first groove portion and extends in such a manner that the change in the radial direction with respect to the circumferential direction is smaller than that of the first groove portion; and a third groove portion that is connected to the second groove portion and extends in such a manner that the change in the radial direction with respect to the circumferential direction is larger than that of the first groove portion and the second groove portion.

[0017] The switching switch of the thirteenth mode of the present utility model is characterized in that, in the switching switch of the tenth mode, the follower portion in the reference follower position is located on the third shaft.

[0018] The switching switch of the fourteenth mode of the present utility model is characterized in that, in the switching switch of the tenth mode, the contact has: a first contact portion that contacts the follower portion at a position on the side closer to the first follower position than the reference follower position; and a second contact portion that contacts the follower portion at a position on the side closer to the second follower position than the reference follower position, and the second contact portion has a shape symmetrical to the first contact portion.

[0019] The switching switch of the fifteenth mode of the present utility model is characterized in that, in the switching switch of the ninth mode, the base portion has a stopper portion that restricts the circumferential movement of the operating lever.

[0020] According to the sixteenth mode of the present utility model, there is provided a camera device having the above-described switching switch.

[0021] According to the present utility model, by operating the operating lever of the switching switch by the user, the aperture blades can be moved between the aperture position and the open position. When the aperture blades are in the aperture position, vignetting occurs at the peripheral portion of the imaging area of the photographic film, so that the peripheral portion of the captured image can be darkened. Thus, a photograph with an aesthetic and / or artistic effect of making the center part more prominent, that is, a vignetting effect, can be taken. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view showing a camera device in an embodiment of the present utility model.

[0023] Figure 2 is a view showing Figure 1 a perspective view of the inner cylinder portion in the shown camera device.

[0024] Figure 3 is Figure 2 an exploded perspective view of a part of the components in the shown inner cylinder portion.

[0025] Figure 4 It is extracted Figure 2 A plan view showing components constituting a switch among the components of the inner cylinder portion shown.

[0026] Figure 5A yes Figure 3 A perspective view of the operating rod in the inner cylinder portion is shown.

[0027] Figure 5B yes Figure 5A A top view of the operating lever is shown.

[0028] Figure 5C yes Figure 5A Bottom view of the operating lever shown.

[0029] Figure 6 yes Figure 3 A perspective view of the working rod shown.

[0030] Figure 7 yes Figure 3 A perspective view of the first substrate is shown.

[0031] Figure 8 It includes Figure 3 The track portion and the extension portion of the operating rod shown are partial cross-sectional views of the operating rod, the first substrate, and the operating rod when a plane perpendicular to the optical axis is used to cut the operating rod.

[0032] Figure 9 yes Figure 3 A top view of the contacts is shown.

[0033] Figure 10A It is schematically shown Figure 2 The diagram shows the relationship between the components when the aperture blades of the inner cylinder are at the aperture position.

[0034] Figure 10B It is schematically shown Figure 2 The diagram shows the relationship between the components when the aperture blades of the inner cylinder are located between the aperture position and the open position.

[0035] Figure 10C It is schematically shown Figure 2 FIG. 1 is a diagram showing the relationship between the components when the aperture blades of the inner cylinder are in the open position.

[0036] Figure 11 It is a top view showing an operating lever in another embodiment of the present invention.

[0037] Figure 12 It shows that the Figure 11Graph showing the relationship between the rotation angle of the working rod and the moving distance of the contact in the case of the operating rod shown.

[0038] Figure 13 is a graph showing Figure 5B the relationship between the rotation angle of the working rod and the moving distance of the contact in the case of the operating rod shown.

[0039] Reference numeral description

[0040] 1: Camera device; 12: Inner cylinder part; 16: Cover plate; 21 - 23: Aperture blades; 30: Changeover switch; 40: First substrate (base); 41: Outer side wall; 41B, 41C: Stopping parts; 42: First inner side wall; 43: First supporting part; 44: Second inner side wall; 45: Second supporting part; 46: Spring fixing part; 47: Concave part; 48: Arc groove; 49: Opening; 50: Operating rod; 51: Arc-shaped plate part; 52: Operating projection; 53: Track part; 54: Extension part; 56: Cam groove; 56A: Inner part; 56B: Outer part; 58A: First groove part; 58B: Second groove part; 58C: Third groove part; 60: Second substrate; 61 - 63: Shaft (rotation shaft); 64: Shaft (second shaft); 70: Working rod; 74: Working part; 76: Driven part; 77: Large-diameter part; 78: Small-diameter part; 80: Force application part; 81: Contact; 82: Coil spring (biasing part); 85: Top part; 86: Inclined part (first contact part); 87: Inclined part (second contact part); 90: Lens; P: Optical axis (first axis); Q: Axis line (third axis). Detailed description of the preferred embodiment

[0041] Hereinafter, with reference to Figures 1 to 13 a detailed description of an embodiment of the camera device of the present invention will be given. In Figures 1 to 13 the same or corresponding components are denoted by the same reference numerals and repeated descriptions are omitted. Further, in Figures 1 to 13 there are cases where the scales and dimensions of the respective components are exaggeratedly shown and cases where some components are omitted. In the following description, unless otherwise specified, terms such as "first" and "second" are used only to distinguish components from each other and do not indicate a specific order or sequence.

[0042] Figure 1 is a perspective view showing the camera device 1 in one embodiment of the present invention. The camera device 1 in the present embodiment is a camera that uses a photographic film that is automatically developed after shooting (i.e., an instant camera), but the present invention can of course also be applied to cameras other than such instant cameras. Further, in the present embodiment, for convenience, the direction along the optical axis direction toward the subject ( Figure 1The direction of +Z (in the figure) is referred to as "front" or "forward", and the direction towards the camera device 1 (-Z direction) is referred to as "rear" or "backward".

[0043] As Figure 1 shown in the figure, the camera device 1 includes a front cover 2, a rear cover 3 mounted behind the front cover 2, a top cover 4 sandwiched between the front cover 2 and the rear cover 3, and a lens barrel 5 that houses a lens unit inside. A viewfinder window 6 is formed on the front cover 2, and a flash window 7 is disposed adjacent to the viewfinder window 6. In addition, a release button 8 is disposed on the -Y direction side of the viewfinder window 6. A discharge slit 4A extending in the X direction is formed in the top cover 4, and the photographic film developed after shooting is discharged from the discharge slit 4A.

[0044] The lens barrel 5 has an outer cylinder portion 10, an operation ring 11 that covers the outer periphery of the outer cylinder portion 10, and an inner cylinder portion 12 that can extend axially inside the outer cylinder portion 10 in the radial direction. The operation ring 11 can rotate outside the outer cylinder portion 10, and by rotating the operation ring 11 relative to the outer cylinder portion 10, the inner cylinder portion 12 is extended forward by an extension mechanism (not shown).

[0045] Figure 2 is a perspective view showing the inner cylinder portion 12. As Figure 2 shown in the figure, the inner cylinder portion 12 includes: a cylindrical body 14; a circular plate 16, which is annular and is mounted in front of the cylindrical body 14; three aperture blades 21 to 23; a changeover switch 30 that can switch the positions of the aperture blades 21 to 23 between an aperture position and an open position; and one or more lenses 90 that image a subject on an imaging area on the photographic film. Figure 2 shows a state in which the aperture blades 21 to 23 are in the aperture position by the changeover switch 30. In addition, the inner cylinder portion 12 further includes aperture blades (not shown) for adjusting the amount of light projected onto the imaging area on the photographic film. The aperture blades 21 to 23 in the present embodiment are used to darken the peripheral portion of the imaging area on the photographic film, and are different from the aperture blades (not shown) for adjusting the amount of light projected onto the imaging area.

[0046] Figure 3 is an exploded perspective view of some constituent elements in the inner cylinder portion 12. As Figure 3As shown, the inner cylinder portion 12 includes: a first substrate 40 (base portion), which is substantially circular plate-shaped; a front panel 18, which is disposed between the first substrate 40 and the cover plate 16; a pair of shutter blades 19A, 19B, which are disposed in the space formed between the first substrate 40 and the front panel 18; an operating lever 50, which is disposed between the first substrate 40 and the cover plate 16; a second substrate 60, which is disposed behind the first substrate 40; a working lever 70, which is disposed in the space formed between the first substrate 40 and the second substrate 60; and a force applying portion 80, which applies a force to the working lever 70. The above aperture blades 21 to 23 are disposed in the space formed between the first substrate 40 and the second substrate 60. The second substrate 60 has shafts 61 to 64 extending in the +Z direction.

[0047] Before shooting, the shutter blades 19A, 19B are in contact with each other as Figure 1 shown to prevent light from the outside from entering the lens (not shown) inside the inner cylinder portion 12. However, during shooting, the shutter blades 19A, 19B move in a direction of separating from each other by a driving mechanism (not shown), so that light from the outside enters the lens inside the inner cylinder portion 12 through the opening 18A of the front panel 18. Figure 2 and Figure 3 show the state during shooting, in which the shutter blades 19A, 19B move to positions where they are separated from each other.

[0048] The changeover switch 30 in the present embodiment includes a part of the first substrate 40, the operating lever 50, the working lever 70, and the force applying portion 80. Figure 4 is to extract Figure 2 the components constituting the changeover switch 30 from the components of the inner cylinder portion 12 shown and show a top view. As Figure 4 shown, the operating lever 50 of the changeover switch 30 is disposed near the peripheral portion of the first substrate 40. As will be described later, the operating lever 50 is configured to be able to move circumferentially about the optical axis P (first axis) by the operation of the user.

[0049] Figure 5A is a perspective view of the operating lever 50, Figure 5B is a top view, Figure 5C is a bottom view. As Figure 4 and Figures 5A to 5C shown, the operating lever 50 has: an arcuate plate portion 51, which extends along an arc centered on the optical axis P when the operating lever 50 is disposed on the first substrate 40; an operating projection 52, which projects in the +Z direction from the arcuate plate portion 51; a track portion 53, which extends along the same arc as the arcuate plate portion 51 on the -Z direction side of the arcuate plate portion 51; and an extension portion 54, which extends in a plate shape from the track portion 53. In addition, irregularities for facilitating the operation of the operating lever 50 are formed at the front end of the operating projection 52.

[0050] The arc-shaped plate portion 51 has a raised portion 51A that bulges in the +Z direction on the front surface and a raised portion 51B that bulges in the -Z direction on the back surface. These raised portions 51A and 51B respectively function to reduce the friction between the operating lever 50 and the plates 16 and 40 by contacting the cover plate 16 and the first substrate 40. In addition, a mark 51C indicating that the aperture blades 21 to 23 are in the aperture position is formed on the front surface of the arc-shaped plate portion 51.

[0051] As Figure 3 shown, a window 17 extending in an arc shape is formed on the cover plate 16 located in front of the operating lever 50. As Figure 1 shown, the operating projection 52 of the operating lever 50 is located inside this window 17. In addition, the mark 51C on the arc-shaped plate portion 51 is visible from the outside through the window 17 of the cover plate 16 in the state shown in Figure 1 , that is, the state where the aperture blades 21 to 23 are in the aperture position. As will be described later, it is hidden behind the cover plate 16 when the operating lever 50 is moved in the circumferential direction (when the aperture blades 21 to 23 are in the open position). Therefore, the user can grasp that the aperture blades 21 to 23 are in the aperture position by confirming the mark 51C of the operating lever 50.

[0052] As Figure 5C shown, the rail portions 53 of the operating lever 50 have thick-walled portions 57A and 57B that protrude outward in the radial direction at both ends and become thick-walled. In addition, the rail portion 53 has a raised portion 53A that bulges in the -Z direction on the back surface, and this raised portion 53A functions to reduce the friction between the operating lever 50 and the first substrate 40 by contacting the first substrate 40.

[0053] As Figure 4 and Figures 5A to 5C shown, a cam groove 56 is formed in the extension portion 54 of the operating lever 50. This cam groove 56 includes an inner portion 56A located on the inner side in the radial direction with respect to the optical axis P and an outer portion 56B located at a position outside the inner portion 56A in the radial direction with respect to the optical axis P. The cam groove 56 extends in the circumferential direction as a whole between the inner portion 56A and the outer portion 56B. As will be described later, the shape of this cam groove 56 is determined according to the relationship between the rotation angle of the working lever 70 and the force applied to the working lever 70 by the force application portion 80.

[0054] Return to Figure 3, a circular hole 21A and a long hole 21B are formed on the aperture blade 21, a circular hole 22A and a long hole 22B are formed on the aperture blade 22, and a circular hole 23A and a long hole 23B are formed on the aperture blade 23. A shaft 61 of the second substrate 60 is inserted into the circular hole 21A of the aperture blade 21, and the shaft 61 is received by the circular hole 21A of the aperture blade 21, whereby the aperture blade 21 can rotate about the shaft 61. Similarly, a shaft 62 of the second substrate 60 is inserted into the circular hole 22A of the aperture blade 22, whereby the aperture blade 22 can rotate about the shaft 62. In addition, a shaft 63 of the second substrate 60 is inserted into the circular hole 23A of the aperture blade 23, whereby the aperture blade 23 can rotate about the shaft 63.

[0055] Figure 6 is a perspective view of the working rod 70. As Figure 6 shown, the working rod 70 includes: a shaft portion 72 having a shaft hole 71 extending in the Z direction; a first arm portion 73 extending from the shaft portion 72; a working portion 74 having a cylindrical shape and extending in the +Z direction from an end of the first arm portion 73; a second arm portion 75 extending from the shaft portion 72 in a direction different from the first arm portion 73; and a driven portion 76 extending in the +Z direction from an end of the second arm portion 75. A shaft 64 (see Figure 3 ) of the second substrate 60 is inserted into the shaft hole 71 of the shaft portion 72. Thus, by the shaft hole 71 of the shaft portion 72 receiving the shaft 64, the working rod 70 can rotate about the shaft 64 (second shaft). The driven portion 76 includes a large-diameter portion 77 having a relatively large diameter and a small-diameter portion 78 located on the +Z direction side of the large-diameter portion 77 and having a diameter smaller than that of the large-diameter portion 77.

[0056] The working portion 74 of the working rod 70 is inserted into the long holes 21B to 23B of the aperture blade 21. The outer diameter of the working portion 74 is slightly smaller than the width of each of the long holes 21B to 23B (the width in the direction perpendicular to the direction in which the long holes 21B to 23B extend), and the working portion 74 can move within each of the long holes 21B to 23B while being engaged with the long holes 21B to 23B of the respective aperture blades 21 to 23. Therefore, when the working rod 70 rotates about the shaft 64, the working portion 74 moves within the long holes 21B to 23B of each of the aperture blades 21 while applying a force to the aperture blades 21 to 23 through engagement with the long holes 21B to 23B, causing the aperture blades 21 to 23 to rotate about the shafts 61 to 63 respectively. Thus, the aperture blades 21 to 23 are connected to the working rod 70 via the working portion 74 and rotate about the respective shafts 61 to 63 (rotation shafts) as the working rod 70 rotates.

[0057] Figure 7 is a perspective view of the first substrate 40. As Figure 4 and Figure 7As shown, the first substrate 40 has: an outer wall 41 having an inner peripheral surface 41A along an arc centered on the optical axis P (first axis); a first inner wall 42 having an outer peripheral surface 42A along an arc centered on the optical axis P inside the outer wall 41 in the radial direction; a first support portion 43 located between the outer wall 41 and the first inner wall 42; a second inner wall 44 having an outer peripheral surface 44A along an arc centered on the optical axis P inside the first inner wall 42 in the radial direction; a second support portion 45 located between the outer wall 41 and the second inner wall 44; and a spring fixing portion 46 protruding from the first support portion 43 in a direction along the axis Q (third axis) perpendicular to the optical axis P. An opening 49 is formed at the center of the first substrate 40. In addition, the outer wall 41 has stoppers 41B and 41C protruding radially inward from the inner peripheral surface 41A.

[0058] An arc groove 48 extending along an arc centered on the axis 64 of the second substrate 60 is formed in the second support portion 45. Figure 6 The follower portion 76 of the working rod 70 shown is inserted into the arc groove 48 from the rear (-Z direction side) of the first substrate 40, and the follower portion 76 moves inside the arc groove 48 as the working rod 70 rotates about the axis 64.

[0059] The heights of the first support portion 43 and the second support portion 45 along the Z direction are the same, and a recess 47 is formed between the first support portion 43 and the second support portion 45. The above-mentioned spring fixing portion 46 is located in the recess 47.

[0060] The above-mentioned operating rod 50 is disposed on the +Z direction side of the first support portion 43 and the second support portion 45. More specifically, the operating rod 50 is disposed on the +Z direction side of the first substrate 40 such that a part of the track portion 53 of the operating rod 50 is on the +Z direction side of the first support portion 43, and a part of the extension portion 54 and the track portion 53 of the operating rod 50 are on the +Z direction side of the second support portion 45.

[0061] Figure 8 It is a partial cross-sectional view when the operating rod 50, the first substrate 40, and the working rod 70 are cut by a plane perpendicular to the optical axis P in a manner including the track portion 53 and the extension portion 54 of the operating rod 50. As Figure 4 and Figure 8 shown, the large-diameter portion 77 of the follower portion 76 of the working rod 70 is located inside the arc groove 48 of the first substrate 40, and the small-diameter portion 78 of the follower portion 76 protrudes from the arc groove 48 to the +Z direction side and is located inside the cam groove 56 of the operating rod 50 disposed on the +Z direction side of the second support portion 45.

[0062] The outer diameter of the small-diameter portion 78 of the follower portion 76 of the working rod 70 is slightly smaller than the width of the cam groove 56 of the operating rod 50 (the width in the direction perpendicular to the direction in which the cam groove 56 extends). The small-diameter portion 78 can move within the cam groove 56 while engaging with the cam groove 56 of the operating rod 50.

[0063] As Figure 8 shown, the thick-walled portion 57A of the rail portion 53 of the operating rod 50 is sandwiched between the inner peripheral surface 41A of the outer side wall 41 of the first substrate 40 and the outer peripheral surface 42A of the first inner side wall 42, and is guided by the inner peripheral surface 41A of the outer side wall 41 and the outer peripheral surface 42A of the first inner side wall 42. In addition, the thick-walled portion 57B of the rail portion 53 of the operating rod 50 contacts the inner peripheral surface 41A of the outer side wall 41 of the first substrate 40, and the extension portion 54 contacts the outer peripheral surface 44A of the second inner side wall 44. That is, the extension portion 54 and the thick-walled portion 57B of the operating rod 50 are sandwiched between the inner peripheral surface 41A of the outer side wall 41 of the first substrate 40 and the outer peripheral surface 44A of the second inner side wall 44, and are guided by the inner peripheral surface 41A of the outer side wall 41 and the outer peripheral surface 44A of the second inner side wall 44. With such a structure, the operating rod 50 can move circumferentially about the optical axis P. Hereinafter, in Figure 8 , the direction in which the operating rod 50 moves clockwise about the optical axis P is referred to as the "open direction", and the direction in which the operating rod 50 moves counterclockwise about the optical axis P is referred to as the "closed direction".

[0064] As Figure 8 shown, a biasing portion 80 is housed in the recess 47 between the first support portion 43 and the second support portion 45 of the first substrate 40. The biasing portion 80 includes a contact 81 that can move along the axis Q (see Figure 7 ) within the recess 47 and a coil spring 82 as a biasing portion that biases the contact 81 in the direction along the axis Q.

[0065] Figure 9 is a top view of the contact 81. As Figure 9 shown, the contact 81 includes a pentagonal prism-shaped contact body 83 and a spring fixing portion 84 that extends from the contact body 83 in the direction along the axis Q. The contact body 83 has a top portion 85 formed as a rounded corner and inclined portions 86, 87 that extend from the top portion 85 to both sides. The top portion 85 and the inclined portions 86, 87 of the contact body 83 are configured to contact the large-diameter portion 77 of the follower portion 76 of the working rod 70 located within the arc groove 48.

[0066] One end of the coil spring 82 is inserted into the spring fixing portion 84 of the contact 81, and the other end is inserted into the spring fixing portion 46 of the first substrate 40 (see Figure 7) Thus, the coil spring 82 is fixed in a compressed state between the contact body 83 and the first support portion 43 of the first substrate 40. Since the contact 81 is urged by the coil spring 82 in the direction along the axis Q, any part of the top portion 85 and the inclined portions 86, 87 contacts the large-diameter portion 77 of the follower portion 76 of the operating rod 70 to press the follower portion 76.

[0067] Figures 10A to 10C FIG. is a diagram schematically showing the relationship between the components in each state of the change-over switch 30. Figure 10A FIG. shows the state in which the aperture blades 21 to 23 are switched to the aperture position by the change-over switch 30, that is, the state when the change-over switch 30 is in Figure 4 and Figure 8 the state shown. Figure 10B FIG. shows the state in the middle of switching the aperture blades 21 to 23 from the aperture position to the open position or in the middle of switching from the open position to the aperture position by the change-over switch 30. Figure 10C FIG. shows the state in which the aperture blades 21 to 23 are switched to the open position by the change-over switch 30. As Figure 10A and Figure 10C shown, the open positions of the respective aperture blades 21 to 23 are located at positions radially outside the aperture positions.

[0068] As Figure 10A shown, when the aperture blades 21 to 23 are in the aperture positions, a part of the aperture blades 21 to 23 projects inward from the edge portion of the opening 49 of the first substrate 40, and the light of the lens incident on the inside of the inner cylinder portion 12 is blocked by the projecting portions of the aperture blades 21 to 23. Due to the projecting portions of the aperture blades 21 to 23, vignetting occurs at the peripheral portion of the imaging area of the photographic film, and the peripheral portion of the captured image is darkened. Thus, a photograph with an aesthetic and / or artistic effect of making the center portion more prominent, that is, a vignetting effect, can be taken. In this state, the small-diameter portion 78 of the follower portion 76 of the operating rod 70 is located inside the inner side portion 56A of the cam groove 56 of the operating lever 50. The position of the operating rod 70 at this time is referred to as the "first operating rod position", and the position of the follower portion 76 is referred to as the "first follower position".

[0069] When the user operates the operation projection 52 (refer to Figure 1 ) of the operating lever 50 located inside the window 17 of the cover plate 16 to move the operating lever 50 from Figure 10AWhen the state shown moves in the opening direction, the small-diameter portion 78 of the follower portion 76 engaged with the cam groove 56 moves along the shape of the cam groove 56 of the operating lever 50. Along with this, the working lever 70 rotates counterclockwise about the axis 64. As described above, since the working portion 74 of the working lever 70 is engaged with the long holes 21B to 23B of the aperture blades 21 to 23, the aperture blade 21 rotates clockwise about the axis 61, the aperture blade 22 rotates clockwise about the axis 62, and the aperture blade 23 rotates counterclockwise about the axis 63 due to the counterclockwise rotation of the working lever 70.

[0070] Here, as Figure 10A shown, when the follower portion 76 of the working lever 70 is in the first follower position, the large-diameter portion 77 of the follower portion 76 contacts the inclined portion 86 of the contact 81. As described above, the contact 81 is urged by the coil spring 82, so the follower portion 76 is pressed by the inclined portion 86 of the contact 81 in the clockwise rotation direction about the axis 64 (see arrow F1). Since the small-diameter portion 78 of the follower portion 76 is engaged with the cam groove 56 of the operating lever 50, by pressing the follower portion 76 clockwise, a closing-direction force acts on the operating lever 50. Therefore, in a state where no external force is applied to the operating lever 50, the closing-direction force generated by the coil spring 82 acts on the operating lever 50, and the thick-walled portion 57A of the rail portion 53 of the operating lever 50 abuts against the stopper portion 41B of the first substrate 40 (see Figure 8 ), thereby maintaining the circumferential position of the operating lever 50. In this way, the stopper portion 41B of the first substrate 40 has the function of restricting the movement of the operating lever 50 in the closing direction. The position of the operating lever 50 at this time is referred to as the "first operating lever position".

[0071] In Figure 10A the state shown, as described above, the closing-direction force acts on the operating lever 50 by the coil spring 82. Therefore, when the user moves the operating lever 50 in the opening direction, a force exceeding the closing-direction force of the coil spring 82 needs to be applied to the operating lever 50. When the user applies a force exceeding the closing-direction force of the coil spring 82 to the operating lever 50 and moves the operating lever 50 from Figure 10A the state shown in the opening direction, the contact portion of the large-diameter portion 77 of the follower portion 76 of the working lever 70 with the contact 81 moves from the inclined portion 86 toward the top portion 85.

[0072] Figure 10B shows a state where the contact portion of the large-diameter portion 77 of the follower portion 76 with the contact 81 has moved to the top portion 85. The position of the follower portion 76 at this time is referred to as the "reference follower position". The follower portion 76 located at the reference follower position is on the axis Q, and at this position, the coil spring 82 does not apply a moment to the working lever 70.

[0073] When the user moves from Figure 10BWhen the operating lever 50 is further moved in the closing direction in the state shown above, as described above, the small-diameter portion 78 of the follower portion 76 moves along the shape of the cam groove 56 of the operating lever 50. Along with this, the working lever 70 rotates counterclockwise about the shaft 64, and each of the aperture blades 21 to 23 rotates to the Figure 10C open position shown.

[0074] As Figure 10C shown, when the aperture blades 21 to 23 are in the open position, the aperture blades 21 to 23 are located outside the edge of the opening 49 of the first substrate 40, and the light of the lens incident on the inside of the inner cylinder portion 12 is not blocked by the aperture blades 21 to 23. In this state, the small-diameter portion 78 of the follower portion 76 of the working lever 70 is located at the outer portion 56B of the cam groove 56 of the operating lever 50. The position of the working lever 70 at this time is referred to as the "second working lever position", and the position of the follower portion 76 is referred to as the "second follower position".

[0075] Here, as Figure 10C shown, when the follower portion 76 of the working lever 70 is in the second follower position, the large-diameter portion 77 of the follower portion 76 contacts the inclined portion 87 of the contact 81. As described above, the contact 81 is biased by the coil spring 82, so the follower portion 76 is pressed by the inclined portion 87 of the contact 81 in the counterclockwise rotation direction about the shaft 64 (see arrow F2). Since the small-diameter portion 78 of the follower portion 76 engages with the cam groove 56 of the operating lever 50, the follower portion 76 is pressed in the counterclockwise rotation direction, thereby applying a force in the opening direction to the operating lever 50. Therefore, in a state where no external force is applied to the operating lever 50, the force in the opening direction generated by the coil spring 82 acts on the operating lever 50, and the thick-walled portion 57B of the rail portion 53 of the operating lever 50 abuts against the stopper portion 41C of the first substrate 40 (see Figure 8 ), thereby maintaining the circumferential position of the operating lever 50. In this way, the stopper portion 41C of the first substrate 40 has the function of restricting the movement of the operating lever 50 in the opening direction. The position of the operating lever 50 at this time is referred to as the "second operating lever position".

[0076] As described above, when the user moves the operating lever 50 from the Figure 10A shown first operating lever position in the opening direction, it is necessary to apply a force to the operating lever 50 that exceeds the closing direction force of the coil spring 82. However, if the large-diameter portion 77 of the follower portion 76 passes over the top portion 85 from the inclined portion 86 of the contact 81 and contacts the inclined portion 87, the opening direction force of the coil spring 82 acts on the operating lever 50. Therefore, even if the user does not apply a force to the operating lever 50, the operating lever 50 moves to the Figure 10C second operating lever position shown. Therefore, the user can feel the change in the force acting on the operating lever 50 (click feeling).

[0077] When the user moves the operating lever 50 from Figure 10C the second operating lever position shown in the figure towards the closing direction, the small-diameter portion 78 of the follower portion 76 moves along the shape of the cam groove 56 of the operating lever 50. Along with this, the working lever 70 rotates clockwise about the shaft 64, and each of the aperture blades 21 to 23 rotates via the working portion 74 of the working lever 70. At this time, as described above, a force in the opening direction acts on the operating lever 50 by the coil spring 82. Therefore, when the user moves the operating lever 50 towards the closing direction, a force exceeding the force in the opening direction of the coil spring 82 needs to be applied to the operating lever 50 until the large-diameter portion 77 of the follower portion 76 crosses over the top portion 85 of the contact 81. After the large-diameter portion 77 of the follower portion 76 crosses over the top portion 85 of the contact 81, the force in the closing direction of the coil spring 82 acts on the operating lever 50. Therefore, even if the user does not apply a force to the operating lever 50, the operating lever 50 moves towards Figure 10A the first operating lever position shown in the figure. In this case, the user can also feel the change in the force acting on the operating lever 50 (click feeling).

[0078] As described above, in the present embodiment, the inclined portion 86 of the contact 81 functions as a first contact portion that contacts the large-diameter portion 77 of the follower portion 76 located on the side of the first follower position relative to the reference follower position, and is pressed against the follower portion 76 in the clockwise rotation direction about the shaft 64 by being urged by the coil spring 82. In addition, the inclined portion 87 of the contact 81 functions as a second contact portion that contacts the large-diameter portion 77 of the follower portion 76 located on the side of the second follower position relative to the reference follower position, and is pressed against the follower portion 76 in the counterclockwise rotation direction about the shaft 64 by being urged by the coil spring 82.

[0079] In the present embodiment, the inclined portion 86 and the inclined portion 87 of the contact 81 have shapes that are symmetrical to each other with respect to the top portion 85, but are not limited thereto. If the inclined portion 86 and the inclined portion 87 are shaped symmetrically to each other with respect to the top portion 85 as in the present embodiment, then in the operation of moving the operating lever 50 from the first operating lever position towards the opening direction (opening operation) and the operation of moving the operating lever 50 from the second operating lever position towards the closing direction (closing operation), forces act on the operating lever 50 in the same way. Therefore, these two operations can be performed evenly. In addition, in the present embodiment, as described above, the reference follower position is located on the axis Q. Therefore, the opening operation and the closing operation can be performed more evenly.

[0080] Thus, in the camera device 1 of the present embodiment, by operating the operating lever 50 of the changeover switch 30 by the user, the aperture blades 21 to 23 can be moved between the aperture position and the open position. By moving the aperture blades 21 to 23 to the aperture position, vignetting is generated at the peripheral portion of the imaging area of the photographic film, so that the peripheral portion of the captured image is darkened. Thereby, a photograph with an aesthetic and / or artistic effect that makes the vicinity of the center more prominent, that is, a vignetting effect, can be taken. As described above, in the case of a digital photograph, the vignetting effect can be added to the captured image by correcting the data after shooting, but in the case of an analog photograph, post-editing cannot be performed. Therefore, especially for a camera device that shoots analog photographs, the function of adding such a vignetting effect is epoch-making.

[0081] In addition, when the follower portion 76 of the operating lever 70 is located on the side of the first follower position with respect to the reference follower position, it is pressed toward the first follower position by the contact 81, and when it is located on the side of the second follower position with respect to the reference follower position, it is pressed toward the second follower position by the contact 81. Therefore, by moving the operating lever 50, the large-diameter portion 77 of the follower portion 76 of the operating lever 70 is moved across the reference follower position, so that the switching state of the aperture blades 21 to 23 can be easily switched, and the structure can also be simple. In addition, the user can feel the change in the force acting on the operating lever 50 from the contact 81, that is, the click feeling, before and after the follower portion 76 of the operating lever 70 crosses the reference follower position.

[0082] Here, the shape of the cam groove 56 of the operating lever 50 will be described. The cam groove 56 of the operating lever 50 in the present embodiment has the following shape: the relationship between the rotation angle of the operating lever 70 about the axis 64 when the follower portion 76 of the operating lever 70 moves from the first follower position toward the reference follower position and the pressing distance of the contact 81 in the direction along the axis Q is the same as the relationship between the rotation angle of the operating lever 70 about the axis 64 when the follower portion 76 moves from the second follower position toward the reference follower position and the pressing distance of the contact 81 in the direction along the axis Q. By forming the cam groove 56 into such a shape, the user can perform the action of moving the operating lever 50 from the first operating lever position in the opening direction (opening action) and the action of moving the operating lever 50 from the second operating lever position in the closing direction (closing action) with the same force, and the operability of the user on the operating lever 50 can be improved.

[0083] For example, consider that the cam groove of the operating lever 50 is as Figure 11This is the case where the cam groove 156 extends linearly from the inner portion 156A toward the outer portion 156B. When the small-diameter portion 78 of the follower portion 76 of the working rod 70 moves along such a cam groove 156, if the relationship between the rotation angle of the working rod 70 relative to the first working rod position and the pressing distance of the contact 81 along the axis Q is obtained by simulation, then as Figure 12 shown.

[0084] It can be seen from Figure 12 that in the case of the linearly extending cam groove 156, when the working rod 70 rotates from the first working rod position toward the second working rod position (the opening operation of the operating rod 50), the pressing distance of the contact 81 increases gently (region A), and the force exerted by the coil spring 82 on the working rod 70 and the operating rod 50 also increases gently. On the other hand, when the working rod 70 rotates from the second working rod position toward the first working rod position (the closing operation of the operating rod 50), the pressing distance of the contact 81 increases sharply (region B), and the force exerted by the coil spring 82 on the working rod 70 and the operating rod 50 also increases sharply. This means that there is a difference in the force for operating the operating rod 50 between the opening operation and the closing operation of the operating rod 50, and the operating feeling of the operating rod 50 is different.

[0085] The above-mentioned cam groove 56 improves the shape of the cam groove 156 so that such a force difference does not occur, and the operating rod 50 can be operated with the same operating feeling in any operation. Specifically, as Figure 5B and Figure 5C shown, the cam groove 56 is composed of a first groove portion 58A, a second groove portion 58B, and a third groove portion 58C. The first groove portion 58A extends along the line connecting the inner portion 56A and the outer portion 56B. The second groove portion 58B is connected to the first groove portion 58A and extends in such a way that the change in the radial direction with respect to the circumferential direction is smaller than that of the first groove portion 58A. The third groove portion 58C is connected to the second groove portion 58B and extends in such a way that the change in the radial direction with respect to the circumferential direction is larger than that of the first groove portion 58A and the second groove portion 58B. The first groove portion 58A coincides with a part of the above-mentioned cam groove 156.

[0086] Figure 13 The relationship between the rotation angle of the working rod 70 relative to the first working rod position and the pressing distance of the contact 81 along the axis Q in the case of using such a cam groove 56 is shown. The period during which the small-diameter portion 78 of the follower portion 76 of the working rod 70 moves within the third groove portion 58C corresponds to region C, the period during which it moves within the second groove portion 58B corresponds to region D, and the period during which it moves within the first groove portion 58A corresponds to region E.

[0087] The shape of the third groove portion 58C is designed such that the change in the pressing distance of the contact 81 in region C is symmetric with respect to the center of the rotation angle range of the operating rod 70 and the change in the pressing distance of the contact 81 in region E (which can also be said to be the change in the pressing distance of the contact 81 in region B). Additionally, the shape of the second groove portion 58B is designed such that the pressing distance of the contact 81 is constant. By making the cam groove 56 have such a shape, the change in the force acting on the operating rod 50 from the coil spring 82 during the opening operation of the operating rod 50 is consistent with the change in the force acting on the operating rod 50 from the coil spring 82 during the closing operation of the operating rod 50. Therefore, the user can perform the opening and closing operations of the operating rod 50 with the same operating feeling.

[0088] The shape of the cam groove 56 in the present embodiment is merely an example. As long as the relationship between the rotation angle of the operating rod 70 and the moving distance (pressing distance) of the contact 81 during the opening operation of the operating rod 50 is the same as the relationship between the rotation angle of the operating rod 70 and the moving distance (pressing distance) of the contact 81 during the closing operation of the operating rod 50, it can be any shape.

[0089] In the present embodiment, the follower portion 76 is divided into a large-diameter portion 77 pressed by the contact 81 and a small-diameter portion 78 that moves within the cam groove 56 of the operating rod 50. However, the large-diameter portion 77 and the small-diameter portion 78 can also be integrated.

[0090] As described above, in the present embodiment, the cam groove 56 of the operating rod 50 and the follower portion 76 of the operating rod 70 constitute a cam mechanism that converts the circumferential movement of the operating rod 50 into the rotation of the operating rod 70 about the axis 64. Such a cam mechanism is not limited to the illustrated example. For example, a cam groove corresponding to the above-mentioned cam groove 56 can also be provided on the operating rod 70, and a follower portion corresponding to the above-mentioned follower portion 76 can be provided on the operating rod 50. The cam mechanism can be constituted by the cam groove of the operating rod 70 and the follower portion of the operating rod 50.

[0091] Additionally, the changeover switch 30 in the above-described embodiment is used to switch the aperture blades 21 - 23 between the aperture position and the open position, but it is not limited thereto. As long as it is a switch that switches between two switching states, it can be used for any purpose. For example, the changeover switch 30 can also be used to drive blades other than the aperture blades 21 - 23. Additionally, the camera device 1 in the above-described embodiment uses three aperture blades 21 - 23 to cause vignetting in the captured image, but the number of such aperture blades is not limited to three. As long as at least one aperture blade is provided, it is sufficient.

[0092] In addition, the changeover switch 30 can also be used in devices other than the camera device 1. In various fields, a slide-type changeover switch in which a joystick slides linearly is mostly used. In the case where the joystick slides linearly, the structure of the changeover switch can be made relatively simple. However, in the case where the joystick needs to slide circumferentially, the structure of the changeover switch easily becomes complicated. Therefore, if the above-described changeover switch 30 is applied to a device that requires the joystick to slide circumferentially, the changeover state can be easily switched with a simple structure.

[0093] As described above, the camera device of the present utility model can adopt the following structure.

[0094]

Structure 1

[0095] A camera device having: at least one lens that images a subject on an imaging area of a photographic film; at least one aperture blade disposed in front of the at least one lens, and the aperture blade is configured to be movable between an aperture position that causes vignetting at the peripheral portion of the imaging area and an open position radially outside the aperture position; and a changeover switch including a joystick that can be moved by a user's operation and a working rod connected to the at least one aperture blade, and the working rod moves the at least one aperture blade between the aperture position and the open position as the joystick moves.

[0096]

Structure 2

[0097] In the camera device of the above-described structure 1, the above switching switch further includes: a base; a cam mechanism that converts the movement of the above operating lever into the rotation of the above working lever, and the cam mechanism includes a cam groove provided in one of the above operating lever and the above working lever and a follower provided in the other of the above operating lever and the above working lever, and the follower can move in the above cam groove while engaging with the above cam groove; and a force applying portion that applies a force to the above follower of the above cam mechanism. The above operating lever of the above switching switch is configured to be movable circumferentially about a first axis on the above base, the above working lever of the above switching switch is configured to be rotatable about a second axis, the above at least one aperture blade is configured to be rotatable about a rotation axis, the above cam groove of the above cam mechanism includes an inner portion and an outer portion located radially outside the above inner portion with respect to the above first axis, and the cam groove extends along the above circumferential direction between the above inner portion and the above outer portion. The above follower of the above cam mechanism can move between a first follower position located in the above inner portion of the above cam groove and a second follower position located in the above outer portion of the above cam groove. The above force applying portion is configured to: when the above follower of the above cam mechanism is located on the side closer to the above first follower position than a reference follower position, press the above follower toward the above first follower position; and when the above follower of the above cam mechanism is located on the side closer to the above second follower position than the above reference follower position, press the above follower toward the above second follower position.

[0098]

Structure 3

[0099] In the camera device of the above-described structure 2, the above force applying portion of the above switching switch includes: a contact configured to move along a third axis and contact the above follower of the above cam mechanism; and a biasing portion that biases the above contact in a direction along the above third axis.

[0100]

Structure 4

[0101] In the camera device of the above-described structure 3, the above cam groove of the above switching switch has the following shape: the relationship between the rotation angle of the above working lever about the above second axis and the moving distance of the above contact along the above third axis when the above follower moves from the above first follower position toward the above reference follower position is the same as the relationship between the rotation angle of the above working lever about the above second axis and the moving distance of the above contact along the above third axis when the above follower moves from the above second follower position toward the above reference follower position.

[0102]

Structure 5

[0103] In the camera device of the above-described structure 4, the cam groove of the above-described changeover switch includes: a first groove portion that extends along a line connecting the above-described inner portion and the above-described outer portion; a second groove portion that is connected to the above-described first groove portion and extends in such a manner that a change in the radial direction with respect to the circumferential direction is smaller than that of the above-described first groove portion; and a third groove portion that is connected to the above-described second groove portion and extends in such a manner that a change in the radial direction with respect to the circumferential direction is larger than those of the above-described first groove portion and the above-described second groove portion.

[0104]

Structure 6

[0105] In the camera device of any one of the above-described structures 3 to 5, the above-described follower portion in the above-described reference follower position is located on the above-described third axis.

[0106]

Structure 7

[0107] In the camera device of any one of the above-described structures 3 to 6, the above-described contact of the above-described changeover switch has: a first contact portion that contacts the above-described follower portion at a position on the side closer to the above-described first follower position than the above-described reference follower position; and a second contact portion that contacts the above-described follower portion at a position on the side closer to the above-described second follower position than the above-described reference follower position, and the second contact portion has a shape symmetric to the above-described first contact portion.

[0108]

Structure 8

[0109] In the camera device of any one of the above-described structures 2 to 7, the above-described base portion of the above-described changeover switch has a stopper portion that restricts the circumferential movement of the above-described operating lever.

[0110] In addition, the changeover switch of the present utility model can adopt the following structure.

[0111]

Structure 9

[0112] A changeover switch having: a base; an operating lever capable of circumferentially moving on the base about a first axis; a working lever capable of rotating about a second axis; a cam mechanism for converting the movement of the operating lever into the rotation of the working lever, the cam mechanism including a cam groove provided in one of the operating lever and the working lever and a follower provided in the other of the operating lever and the working lever, the follower being capable of moving in the cam groove while engaging with the cam groove; and a force applying portion for applying a force to the follower of the cam mechanism, the cam groove of the cam mechanism including an inner portion and an outer portion located radially outside the inner portion with respect to the first axis, the cam groove extending along the circumferential direction between the inner portion and the outer portion, the follower of the cam mechanism being capable of moving between a first follower position located in the inner portion of the cam groove and a second follower position located in the outer portion of the cam groove, the force applying portion being configured to press the follower toward the first follower position when the follower of the cam mechanism is located on a side closer to the first follower position than a reference follower position, and to press the follower toward the second follower position when the follower of the cam mechanism is located on a side closer to the second follower position than the reference follower position.

[0113]

Structure 10

[0114] In the changeover switch of the above Structure 9, the force applying portion includes: a contact configured to move along a third axis and contact the follower of the cam mechanism; and a biasing portion for biasing the contact in a direction along the third axis.

[0115]

Structure 11

[0116] In the changeover switch of the above Structure 10, the cam groove of the cam mechanism has the following shape: the relationship between the rotation angle of the working lever about the second axis and the moving distance of the contact along the third axis when the follower moves from the first follower position toward the reference follower position is the same as the relationship between the rotation angle of the working lever about the second axis and the moving distance of the contact along the third axis when the follower moves from the second follower position toward the reference follower position.

[0117]

Structure 12

[0118] In the changeover switch of the above-described structure 11, the cam groove of the above-described cam mechanism includes: a first groove portion that extends along a line connecting the above-described inner portion and the above-described outer portion; a second groove portion that is connected to the above-described first groove portion and extends in such a manner that the change in the radial direction with respect to the circumferential direction is smaller than that of the above-described first groove portion; and a third groove portion that is connected to the above-described second groove portion and extends in such a manner that the change in the radial direction with respect to the circumferential direction is larger than that of the above-described first groove portion and the above-described second groove portion.

[0119]

Structure 13

[0120] In the changeover switch of any one of the above-described structures 10 to 12, the follower portion in the above-described reference follower position is located on the above-described third shaft.

[0121]

Structure 14

[0122] In the changeover switch of any one of the above-described structures 10 to 13, the contact has: a first contact portion that contacts the follower portion at a position on the side closer to the above-described first follower position than the above-described reference follower position; and a second contact portion that contacts the follower portion at a position on the side closer to the above-described second follower position than the above-described reference follower position, and the second contact portion has a shape symmetrical to the above-described first contact portion.

[0123]

Structure 15

[0124] In the changeover switch of any one of the above-described structures 9 to 14, the base portion has a stopper portion that restricts the circumferential movement of the above-described operating lever.

[0125] In addition, the camera device of the present utility model can adopt the following structure.

[0126]

Structure 16

[0127] A camera device having a changeover switch of any one of the above-described structures 9 to 15.

[0128] Thus far, the preferred embodiments of the present utility model have been described, but the present utility model is not limited to the above-described embodiments, and of course, it can be implemented in various different ways within the scope of its technical idea.

Claims

1. A camera device, characterized in that the camera device has: at least one lens that images a subject on an imaging area of a photographic film; at least one aperture blade disposed in front of the at least one lens, and the aperture blade is configured to be movable between an aperture position that causes vignetting at a peripheral portion of the imaging area and an open position radially outside the aperture position; and a changeover switch that includes an operating lever that can be moved by a user's operation and a working lever connected to the at least one aperture blade, and the working lever moves the at least one aperture blade between the aperture position and the open position as the operating lever moves.

2. The camera device according to claim 1, characterized in that the changeover switch further includes: a base; a cam mechanism that converts the movement of the operating lever into rotation of the working lever, and the cam mechanism includes a cam groove provided in one of the operating lever and the working lever and a follower provided in the other of the operating lever and the working lever, and the follower can move in the cam groove while engaging with the cam groove; and a force applying portion that applies a force to the follower of the cam mechanism, the operating lever of the changeover switch is configured to be circumferentially movable on the base about a first axis, the working lever of the changeover switch is configured to be rotatable about a second axis, the at least one aperture blade is configured to be rotatable about a rotation axis, the cam groove of the cam mechanism includes an inner portion and an outer portion located radially outside the inner portion with respect to the first axis, and the cam groove extends along the circumferential direction between the inner portion and the outer portion, the follower of the cam mechanism can move between a first follower position located in the inner portion of the cam groove and a second follower position located in the outer portion of the cam groove, the force applying portion is configured to press the follower toward the first follower position when the follower of the cam mechanism is located on a side closer to the first follower position than a reference follower position, and press the follower toward the second follower position when the follower of the cam mechanism is located on a side closer to the second follower position than the reference follower position.

3. The camera device according to claim 2, characterized in that the force applying portion of the changeover switch includes: a contact configured to move along a third axis and contact the follower of the cam mechanism; and a biasing portion that biases the contact in a direction along the third axis.

4. The camera device according to claim 3, characterized in that The cam groove of the changeover switch has the following shape: the relationship between the rotational angle of the working rod about the second axis and the moving distance of the contact along the direction of the third axis when the driven part moves from the first driven position toward the reference driven position is the same as the relationship between the rotational angle of the working rod about the second axis and the moving distance of the contact along the direction of the third axis when the driven part moves from the second driven position toward the reference driven position.

5. The camera device according to claim 4, wherein the cam groove of the changeover switch includes: a first groove part extending along a line connecting the inner part and the outer part; a second groove part connected to the first groove part and extending in such a manner that the change in the radial direction with respect to the circumferential direction is smaller than that of the first groove part; and a third groove part connected to the second groove part and extending in such a manner that the change in the radial direction with respect to the circumferential direction is larger than that of the first groove part and the second groove part.

6. The camera device according to claim 3, wherein the driven part in the reference driven position is located on the third axis.

7. The camera device according to claim 3, wherein the contact of the changeover switch has: a first contact part that contacts the driven part at a position on the side closer to the first driven position than the reference driven position; and a second contact part that contacts the driven part at a position on the side closer to the second driven position than the reference driven position, and the second contact part has a shape symmetrical to that of the first contact part.

8. The camera device according to claim 2, wherein the base of the changeover switch has a stopper that restricts the circumferential movement of the operating rod.

9. A changeover switch, wherein the changeover switch has: a base; an operating rod that can move circumferentially about a first axis on the base; a working rod that can rotate about a second axis; a cam mechanism that converts the movement of the operating rod into the rotation of the working rod, and the cam mechanism includes a cam groove provided on one of the operating rod and the working rod and a driven part provided on the other of the operating rod and the working rod, and the driven part can move in the cam groove while engaging with the cam groove; and a force applying part that applies a force to the driven part of the cam mechanism, the cam groove of the cam mechanism includes an inner part and an outer part located radially outside the inner part with respect to the first axis, and the cam groove extends along the circumferential direction between the inner part and the outer part; the driven part of the cam mechanism can move between a first driven position located in the inner part of the cam groove and a second driven position located in the outer part of the cam groove. The force application part is configured to press the follower part toward the first follower position when the follower part of the cam mechanism is located on the side closer to the first follower position than the reference follower position, and to press the follower part toward the second follower position when the follower part of the cam mechanism is located on the side closer to the second follower position than the reference follower position.

10. The changeover switch according to claim 9, wherein the force application part includes: a contact configured to move along a third axis and contact the follower part of the cam mechanism; and a biasing part configured to bias the contact in a direction along the third axis.

11. The changeover switch according to claim 10, wherein the cam groove of the cam mechanism has a shape such that the relationship between the rotational angle of the operating rod about the second axis and the moving distance of the contact along the third axis when the follower part moves from the first follower position toward the reference follower position is the same as the relationship between the rotational angle of the operating rod about the second axis and the moving distance of the contact along the third axis when the follower part moves from the second follower position toward the reference follower position.

12. The changeover switch according to claim 11, wherein the cam groove of the cam mechanism includes: a first groove part extending along a line connecting the inner part and the outer part; a second groove part connected to the first groove part and extending in such a manner that the change in the radial direction with respect to the circumferential direction is smaller than that of the first groove part; and a third groove part connected to the second groove part and extending in such a manner that the change in the radial direction with respect to the circumferential direction is larger than that of the first groove part and the second groove part.

13. The changeover switch according to claim 10, wherein the follower part in the reference follower position is located on the third axis.

14. The changeover switch according to claim 10, wherein the contact has: a first contact part that contacts the follower part located on the side closer to the first follower position than the reference follower position; and a second contact part that contacts the follower part located on the side closer to the second follower position than the reference follower position, and the second contact part has a shape symmetrical to the first contact part.

15. The changeover switch according to claim 9, wherein the base part has a stopper part that restricts the circumferential movement of the operating rod.

16. A camera device, wherein the camera device has the changeover switch according to any one of claims 9 to 15.

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