TWI584053B - Aperture devices and cameras - Google Patents

Description

Aperture device and camera

The present invention relates to an aperture device for adjusting the amount of incident light and a camera provided therewith.

In a variety of cameras including a surveillance camera, an aperture device that adjusts the amount of light incident from the outside (hereinafter referred to as "incident light amount") is incorporated. The aperture device adjusts (accurates) the amount of incident light by changing the size of the aperture opening existing on the optical path of the incident light. As the structure of the aperture device, there is a person who adjusts the amount of light by the movement of the diaphragm member. Specifically, as an example of the diaphragm member, a pair of aperture blades are known (for example, refer to Patent Document 1).

Further, in the prior art, a motor is used as a driving source for moving the diaphragm member. Specifically, the driving force of the drive motor that is rotationally driven is transmitted to the actuating member via the power transmission mechanism, and the diaphragm member is moved by the actuating member. Further, as the power transmission mechanism, a gear transmission mechanism is known (for example, refer to Patent Document 2).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2003-348398

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2011-133788

However, in the aperture device using the gear transmission mechanism, there are the following problems.

That is, although a plurality of gears constituting the gear transmission mechanism are provided between the drive motor and the actuating member, when the gears are meshed, the teeth of the gear are damaged. Specifically, when the drive gear attached to the rotating shaft of the drive motor is meshed with the driven gear, the teeth of the gear may be damaged by the collision of the gears. The reason for this is that, in the conventional aperture device, the drive gear is brought into close contact with the driven gear in the direction (longitudinal direction) in which the support shaft of the driven gear is rotatably supported, and the gears mesh with each other.

As will be described in more detail, in the assembly step of the aperture device, first, a predetermined number of driven gears are engaged with each other, and the driven gears are respectively attached to the corresponding support shafts. Thereafter, the drive gear is engaged with a predetermined one of the driven gears. At this time, it is necessary to face the rotation shaft of the drive motor so that the drive gear and the driven gear face each other. As described above, when the drive gear approaches the driven gear from the direction of the support shaft of the driven gear, the drive gear becomes the rear of the drive motor, so that it is difficult to visually confirm the positional relationship between the drive gear and the driven gear from the outside. Therefore, the operator who actually performs the assembly work explores the meshing of the drive gear and the driven gear. As a result, when the gears are meshed with each other, the teeth and the teeth collide with each other to cause damage. If there is actually damage on the gear, the impedance will increase as the gear rotates. Therefore, problems such as an increase in the minimum operating voltage of the drive motor are caused. Therefore, in order not to damage the teeth of the gear, the operator must work cautiously.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide an aperture device for transmitting a driving force of a driving motor to an actuating member using a driving gear and a driven gear, so as not to damage the teeth of the gear when the driving gear is meshed with the driven gear. A technique of simply meshing gears with each other.

According to a first aspect of the present invention, a diaphragm assembly includes: a diaphragm substrate having a gear case portion; and a diaphragm member movably attached to the diaphragm substrate and forming an aperture opening through which light passes; a member mounted in the gear case portion of the diaphragm substrate, and moving the diaphragm member to change a size of the diaphragm opening; a drive motor; a drive gear mounted on a rotation shaft of the drive motor; and a driven gear; The driving force is transmitted between the driving gear and the actuating member, and is rotatably attached to the support shaft in the gear case portion of the diaphragm substrate; the outer casing member is attached to the gear case portion of the diaphragm substrate; and fixed The member is attached to the outer casing member while holding the drive motor; and the retainer member is attached to the outer casing member by moving along a support surface provided at the outer casing member and forming a right angle with the support shaft The drive gear is supported by the outer casing member by the retainer member The surface is moved to engage with the driven gear described above.

According to a second aspect of the present invention, in the aperture device of the first aspect, the holder member is attached to the outer casing member by a snap-in method of sliding in a direction along the support surface. .

According to a third aspect of the invention, the aperture device of the first or second aspect, wherein The outer casing member has a support hole that is fitted to an end portion of the support shaft to support the support shaft.

The aperture device according to any one of the first to third aspect, wherein the driven gear has an external gear structure of an actuating gear formed on the actuating member; and the first reduction gear Engaged in the actuating gear; the second reduction gear meshes with the first reduction gear; and the third reduction gear meshes with the second reduction gear and the drive gear; the diaphragm substrate has a first support shaft The second reduction gear is rotatably supported by the second reduction gear, and the second support shaft rotatably supports the second reduction gear and the actuating member; and the third support shaft rotatably supports the third reduction gear; The first support shaft, the second support shaft, and the third support shaft are disposed in a gear case portion of the diaphragm substrate in a state of being located at an apex of the isosceles triangle.

According to a fifth aspect of the invention, there is provided a camera comprising: the aperture device according to any one of the first to fourth aspects; and the photoelectric conversion element that emits light through the aperture opening of the aperture device Converted into an electrical signal.

According to the present invention, in the diaphragm device that transmits the driving force of the drive motor to the actuating member using the drive gear and the driven gear, when the drive gear meshes with the driven gear, the gear teeth can be prevented from being damaged, and the gears can be made to each other Simply mesh.

1‧‧‧ aperture device

2‧‧‧ aperture substrate

3‧‧‧ aperture member

4‧‧‧Shielding members

5‧‧‧Aperture Drive Department

6‧‧‧actuating components

7, 8, 9‧‧‧ reduction gears

7a, 8a, 9a‧‧‧ Large diameter gear

7b, 8b, 9b‧‧‧ small diameter gear

7c, 8c, 9c, 53‧‧‧ shaft holes

10‧‧‧ Shell components

11‧‧‧Drive motor

11a‧‧‧Rotary axis

12‧‧‧Retainer components

16, 48, 72‧‧‧ openings

17‧‧‧ Gearbox Department

17a, 17b, 17c, 17d‧‧‧ wall

19‧‧‧Steps

20‧‧‧Protruding

20a, 20b‧‧‧ bearing surface

21a‧‧‧1st shoulder

21b‧‧‧2nd shoulder

22, 23, 24 ‧ ‧ prominence

26, 27, 28, 58a, 58b‧‧‧The locked part

29, 30, 31‧‧‧ shaft

29a, 30a, 31a‧‧‧ Small Trails Department

32‧‧‧floor

33‧‧‧ ribs

35a, 35b‧‧‧ screw fastening

36, 37, 49a, 49b, 54a, 54b‧‧‧ escaping holes

38a, 38b, 38c, 38d‧‧‧ sales guide

41, 42‧‧‧ aperture blades

43‧‧‧ Hole Department

44a, 44b, 44c, 47a, 47b, 47c‧‧‧ guide groove

45, 48‧‧ ‧ snap hole

46‧‧‧Gap section

51a, 51b‧‧‧ card sales

52‧‧‧Operation gear

55a, 55b, 55c‧‧‧ positioning holes

56a, 56b, 56c, 70a, 70b‧‧‧ card

57a, 57b, 57c‧‧‧ support holes

59, 73‧‧‧ wire extraction guides

60‧‧‧ Gear accommodating department

61‧‧‧Connecting Department

62‧‧‧ escaping department

63a, 63b‧‧‧ Pressing Department

64a, 64b‧‧‧ being touched

65‧‧‧ drive gear

66a, 66b‧‧‧Flange

67‧‧‧ Terminals

67a‧‧‧Terminal pin

68‧‧‧Printed wiring substrate

71a, 71b‧‧‧ holding piece

74a, 74b‧‧‧ pedestal

75a, 75b‧‧‧Motor mounting guide

76‧‧‧Motor mounting surface

77a, 77b‧‧‧ setting face

78a, 78b‧‧‧ Insertion

79a, 79b‧‧‧ touching parts

100‧‧‧ camera

101‧‧‧Installation pedestal

102‧‧‧ camera body

103‧‧‧Mirror tube

104‧‧‧ Objective lens

105‧‧‧Photographic components

G‧‧‧ gap

J1‧‧‧ axis

L1, L2, L3‧‧‧ Straight line

O‧‧ Center

X‧‧‧X axis

Y‧‧‧Y axis

Θ1, θ2‧‧‧ angle

1(A) and 1(B) are views showing a configuration example of a camera to which the present invention is applied.

Fig. 2 is a perspective view showing a configuration example of an aperture device according to an embodiment of the present invention.

Figure 3 is an enlarged view of a portion of Figure 2.

4(A) to 4(C) are three side views showing the structure of the diaphragm substrate.

5(A) to (C) are views showing the configuration of the reduction gear.

6(A) to (D) are four views showing the configuration of the outer casing member.

Fig. 7 is a view showing the configuration of a drive motor.

8(A) to (D) are four views showing the configuration of the holder member.

Fig. 9 is a view (1) illustrating an assembly procedure of the aperture device.

Fig. 10 is a view (2) showing an assembly procedure of the aperture device.

Fig. 11 is a view (3) showing an assembly procedure of the aperture device.

Fig. 12 is a view (4) showing an assembly procedure of the aperture device.

Fig. 13 is a view (5) showing the assembly steps of the aperture device.

Fig. 14 is a view (6) showing an assembly procedure of the aperture device.

Fig. 15 is a view showing a state in which the reduction gear is mounted.

Fig. 16 is a view for explaining the moving direction of the drive gear.

Figure 17 is a side view showing the meshing state of the gears.

18(A) and (B) are diagrams showing the measurement results of the lowest operating voltage of the drive motor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the embodiment of the present invention, the description will be made in the following order.

1. The composition of the camera

2. Composition of the aperture device

3. Outline of the assembly steps of the aperture device

4. Action of the aperture device

5. Detailed description of the assembly steps of the aperture device

6. Effect of this embodiment

7. Modifications

<1. Composition of camera>

Fig. 1 is a view showing a configuration of a camera to which the present invention is applied, (A) is an external view of the entire camera, and (B) is a schematic view of the inside of the lens barrel. The illustrated camera 100 is, for example, a surveillance camera that is placed on a ceiling portion (or a wall, etc.) of a building for the purpose of anti-theft. The camera 100 includes a mounting base 101 and a camera body 102. The mounting pedestal 101 is configured to be fixed to a ceiling portion of a building by, for example, screw fastening. The camera body 102 includes a barrel portion 103 and an objective lens 104. The objective lens 104 is attached to the front end of the barrel portion 103. An optical system including the above-described objective lens 104 is incorporated in the inside of the barrel portion 103. Further, as one of the functional portions of the optical system, the above-described aperture device 1 and imaging element 105 are incorporated. The imaging element 105 includes, for example, a CCD (Charge Coupled Device) imaging element, a CMOS (Complementary Metal Oxide Semiconductor) imaging element, or the like. The imaging element 105 is incorporated as an example of a photoelectric conversion element that converts light incident by an opening (aperture opening) formed by a diaphragm member (described below) of the diaphragm device 1 into an electric signal. Furthermore, the present invention is not limited to the camera 100 exemplified herein, and may be applied to a camera having another configuration of the aperture device 1. Further, as the configuration of the optical system, various types of changes such as the type, the number of the lenses, the arrangement, and the arrangement of the diaphragm device 1 can be performed.

<2. Composition of aperture device>

Fig. 2 is a perspective view showing a configuration example of an aperture device according to an embodiment of the present invention, and Fig. 3 is an enlarged view of a part thereof. The aperture device 1 shown in the figure generally includes a diaphragm substrate 2, a diaphragm member 3, a shielding member 4, and a diaphragm driving unit 5. Further, the diaphragm driving unit 5 includes an operating member 6, a plurality of (three in the illustrated example) reduction gears 7, 8, and 9, an outer casing member 10, a drive motor 11, and a holder member 12. In the present embodiment, one of the thickness directions of the diaphragm substrate 2 is referred to as the upper side, and the other is described as the lower side.

(aperture substrate)

4 is a three-side view showing a structure of a diaphragm substrate, in which (A) is a plan view of a diaphragm substrate, (B) is a side view of the diaphragm substrate, and (C) is a bottom view of the diaphragm substrate. The diaphragm substrate 2 is configured using, for example, a resin. The diaphragm substrate 2 is formed in a substantially rectangular shape as a whole. An opening 16 is integrally formed on the aperture substrate 2 . The opening portion 16 is formed in a circular shape in plan view so as to penetrate the aperture substrate 2 in the thickness direction of the plate. A gear case portion 17 is formed on one end side of the long-side direction of the diaphragm substrate 2. The gear case portion 17 is formed integrally with the diaphragm substrate 2. The gear case portion 17 is formed by forming four required peripheral walls 17a, 17b, 17c, and 17d protruding from the surface of the diaphragm substrate 2 in the thickness direction of the plate. The peripheral walls 17a and 17b of the four peripheral walls 17a, 17b, 17c, and 17d are opposed to each other in the longitudinal direction of the diaphragm substrate 2, and the peripheral walls 17c and 17d are opposed to each other in the short-side direction of the substrate 2.

Three projections 22, 23, and 24 are provided on the upper end surface of the gear case portion 17. Among them, the protrusion 22 is provided at an intermediate portion of the peripheral wall 17a. Further, the projection 23 is provided at a corner portion formed by the peripheral wall 17b and the peripheral wall 17c, and the projection 24 is provided at a corner portion formed by the peripheral wall 17b and the peripheral wall 17d. Further, the locked portions 26 and 27 are provided on both sides of the peripheral wall 17a, and the locked portion 28 is also provided at the intermediate portion of the peripheral wall 17b.

Three support shafts 29, 30, 31 are provided inside the gear case portion 17. each The support shafts 29, 30, and 31 are disposed in a state in which they are vertically raised from the bottom plate 32 of the gear case portion 17, and are parallel to each other. Further, each of the support shafts 29, 30, and 31 is provided in a state of being protruded upward. The upper end of the support shaft 29 protrudes slightly upward from the upper end surface of the gear case portion 17, and the upper end of the support shaft 31 protrudes upward from the upper end of the support shaft 29 more than the upper end of the support shaft 29. Moreover, as shown in FIG. 3, the small diameter part 29a is formed in the upper end of the support shaft 29. Similarly, a small diameter portion 30a is formed at the upper end of the support shaft 30, and a small diameter portion 31a is formed at the upper end of the support shaft 31. Similarly to the gear case portion 17, each of the support shafts 29, 30, and 31 is integrally formed with the diaphragm substrate 2. The support shafts 29, 30, 31 are arranged at intervals corresponding to the outer diameters of the gears described below.

Here, the axis parallel to the longitudinal direction of the diaphragm substrate 2 among the two axes orthogonal to the center O of the opening portion 16 is the X axis, and the axis parallel to the short side direction of the diaphragm substrate 2 is the Y axis. . Further, a straight line passing through the center of the support shaft 29 and parallel to the Y-axis is referred to as L1, and a straight line connecting the center of the support shaft 29 and the center of the support shaft 30 is set to L2, and the center and the support shaft of the joint support shaft 29 are connected. The line at the center of 31 is set to L3. In this case, the support shaft 29 is disposed on the X-axis together with the projection 22 and the locked portion 28. Further, considering the straight line L1, the straight line L2 is inclined in the counterclockwise direction by the angle θ1 in the rotation direction about the support shaft 29, and the straight line L3 is oriented in the clockwise direction around the support shaft 29 in the clockwise direction. Tilt angle θ2. Therefore, both the support shaft 30 on the straight line L2 and the support shaft 31 on the straight line L3 are disposed closer to the end portion of the aperture substrate 2 in the longitudinal direction than the position of the straight line L1. The distance from the support shaft 29 to the support shaft 30 is set to be the same distance from the support shaft 29 to the support shaft 31. Further, the angle θ1 and the angle θ2 are also set to the same angle. Therefore, the three support shafts 29, 30, and 31 are arranged to be in the state of the apex of the isosceles triangle. The angles θ1 and θ2 are preferably set in a range of 5 degrees or more and 60 degrees or less. In the present embodiment, particularly in terms of space efficiency, as a preferred example, the angles θ1 and θ2 are both set to 20 degrees. In addition, in FIG. 4, the angle θ1 and the angle θ2 are set to the same angle, but they may be set to different angles.

A rib 33 is formed on the surface of the bottom plate 32 of the gear case portion 17. The rib 33 is formed in a state in which the bottom plate 32 is swelled in a semicircular shape. The ribs 33 are formed substantially concentrically around the support shaft 29 in plan view. Further, in the bottom plate 32, the support shafts 30, 31 are provided at the discontinuous portion of the outer rib portion 33. Further, substantially circular arc-shaped relief holes 36, 37 are provided on both sides of the bottom plate 32. The escape holes 36, 37 are used to avoid positional interference with the engaging pins 51a, 51b of the actuating member 6.

Screw fastening portions 35a and 35b are provided on the two long side portions of the diaphragm substrate 2. The screw fastening portions 35a and 35b are portions for inserting the diaphragm device 1 into the lens barrel portion of the camera from the direction orthogonal to the optical axis direction and screwing it. A U-shaped groove for inserting a screw (not shown) is formed in each of the screw fastening portions 35a and 35b.

A plurality of (four in the illustrated example) guide pins 38a, 38b, 38c, and 38d for guiding the movement of the diaphragm member 3 are provided on the back surface of the diaphragm substrate 2. The guide pins 38a and 38b are disposed in the vicinity of one long side portion of the diaphragm substrate 2, and are disposed on the same straight line parallel to the X-axis. The guide pins 38c and 38d are disposed in the vicinity of the other long side portion of the diaphragm substrate 2, and are disposed on the same straight line parallel to the X-axis.

(aperture member)

The aperture member 3 (see FIG. 2) is formed by a diaphragm aperture through which light passes. The aperture member 3 is movably mounted to the aperture substrate 2. Specifically, the diaphragm member 3 is movably attached to the longitudinal direction of the diaphragm substrate 2 (the X-axis direction in FIG. 4 ).

The diaphragm member 3 is configured using a pair of diaphragm blades 41 and 42. The pair of aperture blades 41 and 42 are formed, for example, by coating a surface of a plate-like material made of polyethylene terephthalate (PET) with a carbon film. Each of the diaphragm blades 41 and 42 is formed in a thin plate shape as a whole.

The one aperture plate 41 is provided with one hole portion 43, three guide grooves 44a, 44b, and 44c, and one engagement hole 45. The hole portion 43 is formed in a straight shape or a circular shape close thereto, and has a planar shape in which one of the circular shapes is cut in a V shape. An ND (Neutral Density) filter (not shown) is attached to a portion (a corner portion of the V-shape) of the hole portion 43 as needed. The three guide grooves 44a, 44b, and 44c are formed in parallel with each other in the longitudinal direction of the diaphragm blades 41. Two of the three guide grooves 44a, 44b, and 44c are formed on the same straight line. Further, a remaining one guide groove 44a is formed at an edge portion of the two guide grooves 44b and 44c opposite to the hole portion 43. The engagement hole 45 is formed on an extension of the two guide grooves 44b and 44c. Further, the engagement hole 45 is formed in a long hole shape along the short side direction of the diaphragm blade 41.

The other aperture blade 42 is provided with one notch portion 46, three guide grooves 47a, 47b, 47c and one engagement hole 48. The notch portion 46 has a substantially V-shaped planar shape. An ND filter (not shown) is attached to one of the notch portions 46 (corner portion of the V shape) as needed. The notch portion 46 is formed by overlapping the hole portion 43 to form a diaphragm opening. The three guide grooves 47a, 47b, and 47c are formed in parallel with each other in the longitudinal direction of the diaphragm blades 42. Two of the three guide grooves 47a, 47b, and 47c are formed on the same straight line. Further, a remaining one guide groove 47c is formed at an edge portion opposite to the two guide grooves 47a and 47b across the notch portion 46. The engagement holes 48 are formed on the extension lines of the two guide grooves 47a and 47b. Further, the engaging hole 48 is formed in a long hole shape along the short side direction of the diaphragm blade 42.

(shading member)

The shielding member 4 (see FIG. 2) shields the diaphragm member 3 attached to the diaphragm substrate 2 from the outside. The shielding member 4 is a member having a thin plate shape. Forming an egg shape on the shielding member 4 The opening portion 48 and the pair of escape holes 49a and 49b. The opening portion 48 is formed to a size that does not block the opening of the aperture formed by the pair of diaphragm blades 41, 42. Each of the escape holes 49a and 49b is formed in a substantially arc shape in plan view. The relief holes 49a and 49b are holes for avoiding positional interference (contact) with the engagement pins 51a and 51b of the actuator member 6 described below.

(aperture drive unit)

The diaphragm driving unit 5 basically drives a part of the diaphragm device 1. Hereinafter, the actuating member 6 constituting the diaphragm driving unit 5, the three reduction gears 7, 8, and 9, the outer casing member 10, the drive motor 11, and the anchor member 12 will be described in order.

(actuating member)

The actuating member 6 (see FIG. 3) is moved in a direction in which the pair of diaphragm blades 41 and 42 are moved in a direction in which the size of the aperture opening formed by the pair of diaphragm blades 41 and 42 is changed. . The actuating member 6 is formed, for example, by molding a resin body. The pair of engaging pins 51a and 51b, the actuating gear 52, and the shaft hole 53 are formed in the actuating member 6. The actuating gear 52 is formed in a central portion of the actuating member 6 so as to protrude in a circular shape in plan view. The actuating gear 52 constitutes a gear transmission mechanism together with the above-described reduction gears 7, 8, and 9 and the following drive gear 65. Further, the actuating gear 52 is a driven gear together with the reduction gears 7, 8, and 9. The actuating gear 52 is configured to form an external tooth at a predetermined angular extent (for example, 90 degrees) on one of the circumferences. The shaft hole 53 is a through hole formed in the center of the actuating member 6. The actuating member 6 is attached to the diaphragm substrate 2 so as to be rotatable about the support shaft 29 in a state in which the support shaft 29 is inserted into the shaft hole 53. Therefore, the inner diameter of the shaft hole .53 is set corresponding to the outer diameter of the support shaft 29. Further, a pair of escape holes 54a and 54b are formed in the actuating member 6. The escape hole 54a is a hole for avoiding the positional interference with the support shaft 30, and the escape hole 54b is for preventing the positional interference with the support shaft 31. In a state in which the actuating member 6 is attached to the diaphragm substrate 2, the support shaft 30 is disposed in the avoidance Inside the hole 54a, the support shaft 31 is disposed in the escape hole 54b.

(reduction gear)

5 is a view showing the structure of the reduction gear, in which (A) shows the structure of the reduction gear 7, (B) shows the structure of the reduction gear 8, and (C) shows the structure of the reduction gear 9. The reduction gears 7, 8, and 9 are each formed by molding a resin body. The reduction gears 7, 8, 9 each have a two-stage gear configuration.

The reduction gear 7 integrally has a large diameter gear portion 7a and a small diameter gear portion 7b. The reduction gear 7 is rotatably attached to the support shaft 30. Therefore, a shaft hole 7c (Fig. 3) is formed at the center of the reduction gear 7. The inner diameter of the shaft hole 7c is set corresponding to the outer diameter of the support shaft 30.

The reduction gear 8 integrally has a large diameter gear portion 8a and a small diameter gear portion 8b. The reduction gear 8 is rotatably attached to the support shaft 29. Therefore, a shaft hole 8c (Fig. 3) is formed at the center of the reduction gear 8. The inner diameter of the shaft hole 8c is set corresponding to the outer diameter of the support shaft 29. Further, in the present embodiment, as a preferred embodiment, the reduction gear 7 and the reduction gear 8 are configured by gears having the same structure (shape, size, and the like).

The reduction gear 9 integrally has a large diameter gear portion 9a and a small diameter gear portion 9b. The tooth width of the small-diameter gear portion 9b is set to be much larger than the tooth width of the large-diameter gear portion 9a. Further, the diameter (the tip circle diameter, the reference circle diameter, the root circle diameter, and the like) of the large diameter gear portion 9a is set to be equal to the diameter of the large diameter gear portions 7a and 8a, and the diameter of the small diameter gear portion 9b is set to It is equal to the diameter of the small-diameter gear portions 7b and 8b. The reduction gear 9 is rotatably attached to the support shaft 31. Therefore, a shaft hole 9c (Fig. 3) is formed at the center of the reduction gear 9. The inner diameter of the shaft hole 9c is set corresponding to the outer diameter of the support shaft 31.

(shell member)

Figure 6 is a four-side view showing the structure of the outer casing member, in which (A) is viewed from one direction A side view of the outer casing member, (B) is a plan view of the outer casing member, (c) is a side view of the outer casing member viewed from the other direction, and (D) is a bottom view of the outer casing member. The outer casing member 10 is attached to the gear case portion 17 of the diaphragm substrate 2. The outer peripheral shape of the outer casing member 10 has substantially the same shape (substantially rectangular shape) as the outer peripheral shape of the gear case portion 17 of the diaphragm substrate 2. Further, the outer casing member 10 is attached to the upper end portion of the gear case portion 17 so as to close the upper portion of the gear case portion 17. On the upper surface side of the outer casing member 10, two support surfaces 20a and 20b are provided at positions shifted in the vertical direction. The support surface 20a is formed at a lower position than the support surface 20b. The support faces 20a, 20b constitute the upper surface of the gear case portion 17. These support surfaces 20a and 20b are the surfaces of the holder member 12 when the holder member 12 is attached to the outer casing member 10.

Three positioning holes 55a, 55b, 55c, three locking pieces 56a, 56b, 56c and three support holes 57a, 57b, 57c are provided on the lower surface side of the outer casing member 10. When it is described in relation to the diaphragm substrate 2 shown in FIG. 4 described above, the positioning hole 55a is provided corresponding to the projection 22. Further, the positioning hole 55b is provided corresponding to the projection 23 of the diaphragm substrate 2, and the positioning hole 55c is provided corresponding to the projection 24.

The locking piece 56a is locked to the engaged portion 28 of the diaphragm substrate 2 by a snap fit. The front end portion of the locking piece 56a is formed in a substantially triangular shape, and the front end portion is configured to be hooked on the engaged portion 28. In the same manner, the locking piece 56b is locked to the locked portion 26 of the diaphragm substrate 2 by the snap-in method, and the locking piece 56c is locked to the engaged portion 27 of the aperture substrate 2 by the snap-in method. . Each of the locking pieces 56a, 56b, and 56c is provided in a state of being protruded below the outer casing member 10.

Here, the "snap-in method" means that a locking piece is provided in one member, and a locked portion is provided in the other member, and the locking member is locked to the engaged portion, so that two members are provided. The way to engage. In the snap-in method, when the locking piece is pressed into the locked portion, the locking piece is elastically deformed due to contact with the engaged portion, and thereafter, when pressed When the amount of the load reaches the predetermined amount, the locking piece is hooked on the engaged portion by the reaction force of the elastic deformation, thereby completing the engagement of the members with each other.

The support hole 57a is provided corresponding to the above-mentioned support shaft 29. Further, the support hole 57b is provided corresponding to the support shaft 30, and the support hole 57c is provided corresponding to the support shaft 31. When the support hole 57a is attached to the upper end of the gear case portion 17 of the diaphragm substrate 2, the support shaft 29 is fitted to the small-diameter portion 29a of the support shaft 29 to support the support shaft 29. Similarly, the support hole 57b is supported by the small-diameter portion 30a of the support shaft 30, and the support hole 57c is supported by the small-diameter portion 31a of the support shaft 31 to support the support shaft 31. . Further, each of the support holes 57a, 57b, and 57c is also configured to prevent the reduction gears 7, 8, and 9 from falling off by fitting the end portions (small diameter portions) of the corresponding support shafts 29, 30, and 31, respectively. Those who play off the part.

Two locked portions 58a and 58b, a wire extraction guide 59, a gear housing portion 60, and two pressing portions 63a and 63b are provided on the upper surface side of the outer casing member 10. The engaged portions 58a and 58b are formed by engaging the outer casing member 10 and the anchor member 12 in a snap-fit manner. The wire take-out guide 59 is a guide for pulling out the wires connected to the drive motor 11 in a bundle. The wire drawing guide 59 is formed in a substantially C shape. The gear housing portion 60 is formed by engaging the following drive gears with the reduction gear 9 (one of the driven gears) to form the outer casing member 10. A communication portion 61 is formed in the gear housing portion 60. The communication portion 61 is opened to communicate the lower surface side of the outer casing member 10 with the upper surface side. Further, the outer casing member 10 is formed with a relief portion 62 that is adjacent to the communication portion 61 and has a substantially U-shape in plan view. The relief portion 62 is formed in a state of being slightly recessed from the support surface 20a of the outer casing member 10 in order to avoid contact with the drive gear described below. The pressing portions 63a and 63b prevent the floater of the holder member 12 from being engaged with one of the holder members 12 when the holder member 12 is attached to the outer casing member 10. The pressing portion 63a is upward from the support surface 20a The protruding portion 63b is formed in a state of being protruded upward from the support surface 20b.

(drive motor)

Fig. 7 is a view showing the configuration of a drive motor. The drive motor 11 is a drive source of the diaphragm device 1 (aperture drive unit 5). The drive motor 11 is constituted by, for example, a stepping motor. A drive gear 65 is attached to the rotary shaft 11a of the drive motor 11. The number of teeth of the drive gear 65 is set to be smaller than the number of teeth of the large-diameter gear portions 7a, 8a, and 9a of the reduction gears 7, 8, and 9 so that the gear transmission mechanism as a whole can obtain a desired reduction ratio. Further, in the present embodiment, the number of teeth of the drive gear 65 is set to be smaller than the number of teeth of the small-diameter gear portions 7b, 8b, and 9b of the reduction gears 7, 8, and 9. The drive motor 11 is provided with flange portions 66a and 66b and a terminal portion 67. The flange portions 66a and 66b are provided at a total of two locations on the outer peripheral portion of the drive motor 11. The flange portions 66a and 66b are formed in a substantially U shape in plan view. A plurality of terminal pins 67a are provided in the terminal portion 67. Moreover, the printed wiring board 68 (FIG. 2, FIG. 3) is attached to the terminal part 67 by soldering etc.. A lead wire (not shown) is attached to the printed wiring board 68 by soldering or the like.

(fixer member)

Figure 8 is a four-side view showing the structure of the holder member, wherein (A) is a side view of the holder member viewed from one direction, (B) is a plan view of the holder member, and (C) is viewed from the other direction. A side view of the holder member, (D) is a bottom view of the holder member. The holder member 12 is attached to the outer casing member 10 in a state in which the drive motor 11 is held. The holder member 12 is provided with two locking pieces 70a and 70b, two holding pieces 71a and 77b, an opening 72, a wire take-out guide 73, pedestal portions 74a and 74b, and motor mounting guides 75a and 75b. .

The locking pieces 70a and 70b are formed by attaching the holder member 12 to the outer casing member 10 in a snap-fit manner. In the installation of the snap-in mode, the locking piece 70a is paired In the locked portion 58a of the outer casing member 10, the locking piece 70b corresponds to the engaged portion 58b of the outer casing member 10. Each of the locking pieces 70a, 70b protrudes in a direction parallel to the main surface (motor mounting surface 76) of the holder member 12.

The holding pieces 71a, 71b are used to engage the drive motor 11 to the holder member 12. The holding pieces 71a and 71b are provided in a state in which the motor mounting surface 76 of the holder member 12 protrudes upward. Further, the holding pieces 71a and 71b are disposed in a state of being opposed to each other with the opening 72 interposed therebetween.

The opening portion 72 is circularly opened to the motor mounting surface 76 of the holder member 12. The drive gear 65 attached to the drive motor 11 is disposed in a state of protruding toward the back side of the motor mounting surface 76 through the opening 72. On the back side of the motor mounting surface 76, two installation surfaces 77a and 77b are formed in parallel with the motor mounting surface 76. The installation surface 77a is formed corresponding to the support surface 20a of the outer casing member 10, and the installation surface 77b is formed corresponding to the support surface 20b of the outer casing member 10.

The wire take-out guide 73 is a guide for pulling out the wires connected to the drive motor 11 in a bundle. The wire take-out guide 73 is formed in a substantially C shape. When the holder member 12 is attached to the outer casing member 10, the wire take-up guide 59 and the wire take-up guide 73 are disposed to face each other with the drive motor 11 interposed therebetween. The reason why the two lead extraction guides 59, 73 are provided corresponding to one aperture device 1 in this manner is that the connection to the drive motor 11 can be extracted in order to extract any of the guide members 59, 73 from the two wires. wire.

The pedestal portions 74a and 74b are portions that support the printed wiring board 68 when the drive motor 11 is attached to the holder member 12. The motor mounting guides 75a, 75b are portions that guide the drive motor 11 to a predetermined mounting position when the drive motor 11 is mounted to the holder member 12. The inner side of each of the motor mounting guides 75a, 75b becomes an edge An arc-shaped curved surface that drives the outer circumference of the motor 11 is driven. Further, in order to function as a motor mounting guide portion, the inner surface of the pedestal portion 74a also has an arcuate curved surface along the outer peripheral shape of the drive motor 11.

Further, two fixing portions 78a and 78b are provided in the holder member 12. The insertion portion 78a is formed corresponding to the pressing portion 63a of the outer casing member 10, and the insertion portion 78b is formed corresponding to the pressing portion 63b of the outer casing member 10.

<3. Outline of assembly procedure of aperture device>

The assembly procedure of the aperture device 1 is roughly divided into a step of attaching the diaphragm driving unit 5 to the diaphragm substrate 2 and a step of attaching the diaphragm member 3 to the diaphragm substrate 2.

In the step of attaching the diaphragm driving unit 5 to the diaphragm substrate 2, first, as shown in FIG. 9, the operating member 6 is attached to the gear case portion 17. Next, as shown in FIGS. 10 to 12, the reduction gear 7, the reduction gear 8, and the reduction gear 9 are sequentially mounted on the gear case portion 17 of the diaphragm substrate 2.

Next, as shown in FIG. 13, the outer casing member 10 is attached to the upper end portion of the gear case portion 17.

On the other hand, as shown in FIG. 7 described above, the drive gear 65 is attached to the rotary shaft 11a of the drive motor 11. At this time, the drive gear 65 is fixed to the rotary shaft 11a so that the drive gear 65 rotates integrally with the rotary shaft 11a. Next, the drive motor 11 is attached to the holder member 12. Next, as shown in FIG. 14, the holder member 12 to which the drive motor 11 is attached is attached to the outer casing member 10. At this time, the holder member 12 is in a state of being stacked on the outer casing member 10. Further, the drive gear 65 may be attached to the rotating shaft 11a after the drive motor 11 is attached to the holder member 12.

In the step of attaching the diaphragm member 3 to the diaphragm substrate 2, the diaphragm blades 41 and the diaphragm blades 42 are sequentially attached to the lower surface side of the diaphragm substrate 2. At this time, the engaging hole 45 of the diaphragm blade 41 is engaged with the engaging pin 51a of the actuating member 6, and the diaphragm blade is made The engaging hole 48 of 42 is engaged with the engaging pin 51b of the actuating member 6. Further, the guide grooves 44a, 44b, and 44c of the diaphragm blade 41 are respectively engaged with the guide pins 38a, 38c, and 38d of the corresponding diaphragm substrate 2. Similarly, the guide grooves 47a, 47b, and 47c of the diaphragm blade 42 are respectively engaged with the guide pins 38a, 38b, and 38c of the corresponding diaphragm substrate 2.

Next, the shielding member 4 is attached to the diaphragm substrate 2. Thereby, the diaphragm blades 41 and 42 are in a state of being shielded by the shielding member 4 on the back side of the diaphragm substrate 2. Further, the engaging pins 51a and 51b of the actuating member 6 are disposed in the escape holes 49a and 49b of the shielding member 4.

<4. Action of aperture device>

The aperture device 1 operates in accordance with the driving of the drive motor 11. In other words, when the drive motor 11 is driven, the rotational driving force is transmitted from the drive gear 65 to the actuating gear 52 via the reduction gear 9, the reduction gear 8, and the reduction gear 7. Therefore, the actuating member 6 rotates as the drive motor 11 is driven.

Further, when the actuating member 6 rotates, the diaphragm blades 41 and 42 that are engaged with the engaging pins 51a and 51b of the actuating member 6 linearly move in the longitudinal direction of the diaphragm substrate 2. At this time, the direction in which the diaphragm blades 41 move and the direction in which the diaphragm blades 42 move are opposite directions. Further, the size of the aperture opening changes depending on the direction in which the aperture blades 41, 42 move. Therefore, the size of the aperture opening can be adjusted by changing the amount of rotation and the direction of rotation of the drive motor 11.

<5. Detailed description of the assembly steps of the aperture device>

Hereinafter, the procedure of attaching the diaphragm driving unit 5 to the diaphragm substrate 2 will be described in further detail.

(Installation of the actuating member 6)

When the actuating member 6 is mounted in the gear case portion 17 of the diaphragm substrate 2, such as As shown in Fig. 9, the actuating member 6 is attached to the support shaft 29 so that the support shaft 29 is inserted into the shaft hole 53 of the actuating member 6. Further, the support shaft 30 is inserted into the escape hole 54a of the actuating member 6, and the support shaft 31 is inserted into the escape hole 54b of the actuating member 6. Further, the engaging pin 51a of the actuating member 6 is inserted into the escape hole 36 of the diaphragm substrate 2, and the engaging pin 51b of the actuating member 6 is inserted into the escape hole 37 of the diaphragm substrate 2. Thereby, the actuating member 6 is placed on the rib 33 inside the gear case portion 17, and in this state, the actuating member 6 is rotatably supported around the support shaft 29. As shown in FIG. 9, the terminal of one of the rotational operation ranges of the actuating member 6 is restricted to a state in which the first shoulder portion 21a of the actuating member 6 is brought into contact with the protruding portion 20 provided inside the peripheral wall 17a. Further, the other end of the rotational operation range of the actuating member 6 is restricted to a state in which the second shoulder portion 21b is touched by rotating the actuating member 6 in the clockwise direction from the state shown in Fig. 9 described above. At the protrusion 20.

(Installation of reduction gears 7, 8, 9)

First, as shown in FIG. 10 described above, the reduction gear 7 is attached to the support shaft 30 so that the support shaft 30 is inserted into the shaft hole 7c of the reduction gear 7. At this time, the small-diameter gear portion 7b of the reduction gear 7 is engaged with the actuating gear 52 of the actuating member 6. A gap G as shown in Fig. 15 is secured between the lower surface of the reduction gear 7 mounted on the fulcrum 30 and the upper surface of the actuating member 6 opposed thereto. This gap G is secured by forming the step portion 19 by the support shaft 30 and causing the reduction gear 7 to contact the step portion 19.

Next, as shown in FIG. 11 described above, the reduction gear 8 is attached to the support shaft 29 so that the support shaft 29 is inserted into the shaft hole 8c of the reduction gear 8. At this time, the small-diameter gear portion 8b of the reduction gear 8 is meshed with the large-diameter gear portion 7a of the reduction gear 7. Since the reduction gear 8 is attached to the support shaft 29 shared with the actuating member 6, it is disposed directly above the actuating member 6. The reduction gear 8 can be directly placed on the actuating member 6, or can be the same as above In the sample, a step is provided on the support shaft 29, and the reduction gear 8 is brought into contact therewith, so that there is a gap between the reduction gear 8 and the actuation member 6.

Next, as shown in FIG. 12 described above, the reduction gear 9 is attached to the support shaft 31 so that the support shaft 31 is inserted into the shaft hole 9c of the reduction gear 9. At this time, the small diameter gear portion 9b of the reduction gear 9 is meshed with the large diameter gear portion 8a of the reduction gear 8. Between the lower surface of the reduction gear 9 attached to the support shaft 31 and the upper surface of the actuating member 6 opposed thereto, as in the above case, the step portion is provided on the support shaft 31, and the reduction gear 9 is touched. Touch this and make sure the gap.

(Installation of the outer casing member 10)

When the outer casing member 10 is mounted, the three locking pieces 56a, 56b, 56c are respectively aligned with the positions of the corresponding engaged portions 26, 27, 28, as shown in FIG. 13 above, in the gear case portion 17. The upper end covers the outer casing member 10. At this time, the outer casing member 10 is positioned with respect to the gear case portion 17 by fitting the three positioning holes 55a, 55b, 55c to the corresponding protrusions 22, 23, and 24, respectively. Further, by fitting the three support holes 57a, 57b, 57c provided on the back side of the outer casing member 10 to the small diameter portions 29a, 30a, 31a of the corresponding support shafts 29, 30, 31, the outer casing is used. The member 10 supports the support shafts 29, 30, 31. Further, by attaching the three locking pieces 56a, 56b, and 56c to the corresponding engaged portions 26, 27, and 28, the outer casing member 10 is attached to the gear case portion 17 of the diaphragm substrate 2 by the snapping method. . In this mounted state, the support faces 20a, 20b of the outer casing member 10 are disposed at right angles to the support shafts 29, 30, 31.

(Installation of the drive motor 11)

When the drive motor 11 is attached to the holder member 12, the two flange portions 66a, 66b are respectively aligned with the positions of the corresponding holding pieces 71a, 71b, and the drive motor 11 is pressed against the holder member 12. Motor mounting surface 76. At this time, the drive motor 11 is made The circumferential surface is provided with guide portions 75a, 75b along the motor. Further, the holding piece 71a is hooked to the concave portion of the flange portion 66a, and the holding piece 71b is hooked to the concave portion of the other flange portion 66b. Thereby, the drive motor 11 is fixed to the holder member 12 by the pair of holding pieces 71a and 71b.

(Installation of the holder member 12)

When the holder member 12 is attached to the outer casing member 10, as shown in FIG. 7 described above, the drive gear 65 of the drive motor 11 is directed downward, and in this state, the holder member 12 is mounted as shown in FIG. 14 described above. The outer casing member 10. Specifically, the installation is performed in the following order. Here, in addition to the above-described FIG. 14 , the above-described FIG. 6 showing the details of the outer casing member 10 and the above-described FIG. 8 showing the details of the anchor member 12 will be described.

First, the holder member 12 is placed on the outer casing member 10 in a state in which the two locking pieces 70a and 70b face the corresponding engaged portions 58a and 58b, respectively. At this time, the installation surface 77a of the holder member 12 is brought into contact with the support surface 20a of the holder member 12, and the installation surface 77b of the holder member 12 is brought into contact with the support surface 20b of the holder member 12. Next, the holder member 12 is moved (slid) along the support faces 20a and 20b in a state where the faces are brought into contact with each other. At this time, the two locking pieces 70a and 70b are inserted into the corresponding locked portions 58a and 58b, respectively. That is, the holder member 12 is slid into the outer casing member 10 from the lateral direction, whereby the anchor member 12 is attached to the outer casing member 10 in a snap-fit manner.

As a result, as shown in FIG. 12 described above, the drive gear 65 attached to the rotary shaft 11a of the drive motor 11 is in a state in which the large diameter of the reduction gear 9 is in a state where the center of the drive gear 65 is located on the X-axis. The gear portion 9a is meshed. In this state, the center of the reduction gear 7 and the center of the reduction gear 9 are disposed on the axis J1 parallel to the short-side direction (Y-axis direction) of the diaphragm substrate 2, and the drive gear is disposed on the same axis J1. The center of 65. Thereby, several gears can be arranged with a high installation density in a limited space.

When the above-described holder member 12 is mounted, the direction in which the holder member 12 moves (slides) on the outer casing member 10 becomes a direction parallel to the support faces 20a, 20b of the outer casing member 10 and in the Y-axis direction. Therefore, the drive gear 65 of the drive motor 11 approaches the large-diameter gear portion 9a of the reduction gear 9 from the lateral direction (Y direction) of the support faces 20a, 20b of the outer casing member 10. Further, by sliding in from the lateral direction (Y direction), the two locking pieces 70a and 70b are respectively hooked to the corresponding engaged portions 58a and 58b, whereby the holder member 12 is engaged. It is fixed to the outer casing member 10. Further, in the moving direction of the holder member 12, the two contact portions 79a, 79b provided on the holder member 12 are brought into contact with the two contact portions 64a, 64b of the outer casing member 10 corresponding thereto ( Referring to Figure 6), the anchor member 12 is positioned relative to the outer casing member 10. Further, by inserting the insertion portion 78a into the pressing portion 63a and inserting the insertion portion 78b into the pressing portion 63b, the floating of the holder member 12 can be suppressed.

When the holder member 12 is attached as described above, the drive gear 65 of the drive motor 11 meshes with the large-diameter gear portion 9a of the reduction gear 9 at the communication portion 61 of the gear housing portion 60. At this time, as shown in FIG. 16, the drive gear 65 is configured to move toward the center of the reduction gear 9 along the axis J1.

As shown in FIG. 17, the drive gear 65 of the drive motor 11 is meshed with the large-diameter gear portion 9a of the reduction gear 9, and the small-diameter gear portion 9b of the reduction gear 9 is meshed with the reduction gear 8 as shown in FIG. The large diameter gear portion 8a. Further, the small-diameter gear portion 8b serving as the reduction gear 8 meshes with the large-diameter gear portion 7a of the reduction gear 7, and the small-diameter gear portion 7b of the reduction gear 7 is engaged with the actuator gear 52 of the actuator member 6. Therefore, when the drive motor 11 is driven, the driving force is transmitted to the actuating member 6 via the gear transmission mechanism. Specifically, when the drive motor 11 is driven, the driving force is transmitted from the drive gear 65 to the actuating gear 52 via the reduction gear 9, the reduction gear 8, and the reduction gear 7. because Thus, as described above, the size of the aperture opening formed by the aperture blades 41, 42 can be adjusted by the rotation of the actuator member 6 driven by the drive motor 11.

<6. Effect of this embodiment>

According to the aperture device 1 of the embodiment of the present invention, the following effects can be obtained.

In other words, in the present embodiment, the holder member 12 to which the drive motor 11 is attached is attached to the outer casing member 10 by the snap-in method of sliding in from the lateral direction, and the drive gear 65 is meshed. The large diameter gear portion 9a of the reduction gear 9 is provided. In this configuration, the force generated when the drive gear 65 comes into contact with the reduction gear 9 acts on the direction in which the drive gear 65 and the reduction gear 9 rotate. Therefore, the reduction gear 9 and the drive gear 65 can be smoothly meshed without damaging the mutual teeth. Therefore, it is possible to avoid a problem caused by the damage of the gear, for example, an increase in the operating voltage of the drive motor 11.

Fig. 18 is a view showing the results of measuring the lowest operating voltage of the drive motor when the product (iris device) having damage to the teeth of the gear and the non-damaged product are operated. Fig. 18(A) shows the measurement results in the case of damage, and (B) shows the measurement results in the case of no damage. As can be seen from the figure, in the damaged product, the maximum value of the voltage change is 0.6 V, the minimum value is 0.3 V, and the average value is 0.42 V, compared with the minimum operating voltage of the motor unit. On the other hand, in the non-damaged product, the maximum value of the voltage change is 0.2 V, the minimum value is 0.0 V, and the average value is 0.04 V, compared with the lowest operating voltage of the motor unit. In the case where the average value of the voltage change is compared, it can be seen that the amount of change (increased amount) of the lowest operating voltage of the drive motor is large in the case of damage, and the change in the minimum operating voltage of the drive motor in the case of no damage. 10 times the amount (increase). It can be seen from the above measurement results that the damage of the gear greatly affects the operating voltage of the drive motor. Therefore, as long as the optical disk device 1 configured as described above can be assembled without damaging the gear, the increase in the minimum operating voltage can be effectively avoided.

Moreover, in the present embodiment, the holder member 12 is attached to the outer casing member 10 by the engagement of the locked portions 58a and 58b and the locking pieces 70a and 70b. Therefore, the reduction gear 9 can be meshed with the drive gear 65 while guiding the moving direction of the holder member 12 by the engagement method. Therefore, it is not necessary for the operator to fumblefully engage the gears with each other as is conventional, and it is possible to simplify the assembly work and shorten the time.

Further, in the present embodiment, the small diameter portions 29a, 30a, and 31a of the support shafts 29, 30, and 31 are fitted to the three support holes 57a, 57b, and 57c provided in the holder member 12. The structure of the support shafts 29, 30, 31 is supported. Therefore, when the gear transmission mechanism operates, the inclination and vibration of the respective support shafts 29, 30, and 31 can be suppressed, and the respective reduction gears 7, 8, and 9 can be smoothly rotated. Further, with this configuration, the reduction gears 7, 8, and 9 can be prevented from coming off the support shafts 29, 30, and 31.

Further, in the present embodiment, the three support shafts 29, 30, and 31 supporting the reduction gears 7, 8, and 9 are disposed on the gear case portion 17 of the diaphragm substrate 2 in a state of being located at the apex of the isosceles triangle. Composition. In this configuration, the occupation size of the gear transmission mechanism can be suppressed to be smaller than when the three support shafts 29, 30, and 31 are arranged side by side on a straight line. In particular, if the support shafts 30 and 31 are disposed closer to the end portion of the diaphragm substrate 2 than the support shaft 29 as in the above-described FIG. 4, the reduction gear 7 can be disposed by effectively utilizing the space of the corner portion of the diaphragm substrate 2. 9. Further, by setting the distance from the support shaft 29 to the support shaft 30 to be equal to the distance from the support shaft 29 to the support shaft 31, the diameter of each gear (the tip circle diameter, the reference circle diameter, and the root diameter) Such as sharing, the gear design can be easily improved. Further, the reduction gear 7 and the reduction gear 8 may be configured by the same gear as in the above embodiment. This effect can be similarly obtained in the case where the support shafts 30 and 31 are disposed at positions symmetrical with respect to the axis L1 in the above-described FIG. 4 .

Also, by using the support shafts 29, 30, 31 which will support the reduction gears 7, 8, and 9. Since it is integrally provided in the diaphragm substrate 2, the number of parts can be simultaneously realized as compared with the case where the support shaft of the support gear is provided in a member different from the diaphragm substrate, for example, in the diaphragm device described in Patent Document 2 described above. Reduction and reduction in the number of assembly steps.

<7. Modifications, etc.>

In addition, the technical scope of the present invention is not limited to the above-described embodiments, and various modifications and improvements are possible in a range in which the specific effects obtained by the essential conditions of the invention and the combinations thereof can be derived.

For example, in the above-described embodiment, the gear transmission mechanism is exemplified by the fact that three reduction gears 7, 8, and 9 are provided between the drive gear 65 and the actuation gear 52. However, the present invention is not limited thereto, and may be employed. There are two types of reduction gears, one configuration of one reduction gear, or a configuration in which the drive gear 65 is directly meshed with the actuation gear 52.

1‧‧‧ aperture device

2‧‧‧ aperture substrate

3‧‧‧ aperture member

4‧‧‧Shielding members

5‧‧‧Aperture Drive Department

6‧‧‧actuating components

7‧‧‧Reduction gear

8‧‧‧Reducing gear

9‧‧‧Reduction gear

10‧‧‧ Shell components

11‧‧‧Drive motor

12‧‧‧Retainer components

16‧‧‧ openings

17‧‧‧ Gearbox Department

20a‧‧‧bearing surface

20b‧‧‧bearing surface

29‧‧‧ Support shaft

30‧‧‧ fulcrum

31‧‧‧ Support shaft

35a‧‧‧screw fastening

35b‧‧‧screw fastening

41‧‧‧ aperture blades

42‧‧‧ aperture blades

43‧‧‧ Hole Department

44a‧‧‧ Guide groove

44b‧‧‧ guiding groove

44c‧‧ ‧ guiding groove

45‧‧‧Snap hole

46‧‧‧Gap section

47a‧‧‧Guide ditch

47b‧‧‧ Guide groove

47c‧‧ ‧ guiding groove

48‧‧‧ openings

49a‧‧‧ escaping holes

49b‧‧‧ escaping holes

51a‧‧‧ card sales

51b‧‧‧ card sales

52‧‧‧Operation gear

53‧‧‧Axis hole

54a‧‧‧ escaping holes

54b‧‧‧ escaping holes

56c‧‧‧ card stop

58a‧‧‧The locked part

58b‧‧‧The locked part

59‧‧‧Wire extraction guide

61‧‧‧Connecting Department

62‧‧‧ escaping department

63a‧‧‧ Pressing Department

63b‧‧‧ Pressing Department

65‧‧‧ drive gear

66b‧‧‧Flange

67‧‧‧ Terminals

68‧‧‧Printed wiring substrate

70a‧‧‧ card stop

71a‧‧‧Clamping piece

71b‧‧‧Clamping piece

73‧‧‧Wire extraction guide

Claims (7)

An aperture device comprising: a diaphragm substrate having a gear box portion; a diaphragm member movably mounted to the diaphragm substrate and forming an aperture opening through which light passes; and an actuating member mounted on the aperture substrate In the gear box portion, the diaphragm member is moved to change the size of the aperture opening; a drive motor; a drive gear mounted on a rotation shaft of the drive motor; and a driven gear on the drive gear and the a driving force is transmitted between the actuating members, and is rotatably attached to the support shaft in the gear case portion of the diaphragm substrate; a case member attached to the gear case portion of the diaphragm substrate; and a holder member for holding the above The outer casing member is attached to the outer casing member while the motor is driven; and the retainer member is attached to the outer casing member by being moved along a support surface provided at the right angle of the outer casing member and forming the right angle with the support shaft, the drive gear Is a support surface along the outer casing member by the fastener member Movable manner with the above-described driven gear is constituted by. The aperture device of claim 1, wherein the holder member is attached to the outer casing member by a snap-in method that slides in a direction along the support surface. The aperture device according to claim 1, wherein the outer casing member has a support hole that is fitted to an end portion of the support shaft to support the support shaft. The aperture device of claim 2, wherein the outer casing member has The end portion of the support shaft is fitted to support the support hole of the support shaft. The aperture device according to any one of claims 1 to 4, wherein the driven gear has an external gear structure actuating gear formed on the actuating member, and a first reduction gear engaged with the actuating gear a second reduction gear that meshes with the first reduction gear; and a third reduction gear that meshes with the second reduction gear and the drive gear; the diaphragm substrate has a first support shaft that is rotatably supported a first reduction gear; a second support shaft that supports the second reduction gear and the actuating member that are rotatable; and a third support shaft that supports the third reduction gear that is rotatable; and the first support The shaft, the second support shaft, and the third support shaft are disposed in a gear case portion of the diaphragm substrate in a state of being located at an apex of the isosceles triangle. A camera comprising: the aperture device according to any one of claims 1 to 4; and a photoelectric conversion element that converts light incident through the aperture opening of the aperture device into an electrical signal. The camera of claim 6, wherein the driven gear has an external gear structure actuating gear formed on the actuating member; a first reduction gear meshing with the actuating gear; and a second reduction gear; Engaged in the first reduction gear; and the third reduction gear meshed with the second reduction gear and the drive gear; the diaphragm substrate has: a first support shaft that supports the first reduction gear that is rotatable; a second support shaft that supports the second reduction gear and the actuating member that are rotatable; and a third support shaft that is rotatable freely The third reduction gear; and the first support shaft, the second support shaft, and the third support shaft are disposed in a gear case portion of the diaphragm substrate in a state of being located at an apex of the isosceles triangle.