Optical component attachment structure and optical device

Abstract

To provide an optical component attachment structure and an optical device which can suppress displacement of an optical component with respect to a housing.SOLUTION: A filter attachment structure 60 includes: a filter 62 as an optical transmissive component; an elastically deformable pressing plate 64 for pressing the filter 62 in a front-back direction; a housing 72 provided with a storage unit 76 for storing the filter 62 and a fixation unit 82 formed in a side wall part 77 surrounding the storage unit 76 and fixing the pressing plate 64; and a provision unit 91 for providing force to both end parts TA and TB in the right-left direction of the pressing plate 64 so that the center part M1 in the right-left direction of the pressing plate 64 becomes closer to the filter 62 in the front-back direction than both end parts TA and TB.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to an optical component mounting structure and an optical device. [Background technology]

[0002] The shutter unit disclosed in Patent Document 1 includes a neutral density filter and a neutral density filter pressing plate that presses the neutral density filter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-093710 A Summary of the Invention [Problem to be solved by the invention]

[0004] When fixing an optical component to a housing, there is a configuration in which the optical component is fixed by pressing a pressing plate against the optical component, such as the shutter unit of Patent Document 1. In this configuration, when both ends of the pressing plate in one direction are pressed toward the optical component, the center part in that direction tends to bend in a direction away from the optical component, and the optical component tends to become misaligned with respect to the housing.

[0005] An object of the present invention is to provide an optical component mounting structure and an optical device that can suppress misalignment of an optical component with respect to a housing. [Means for solving the problem]

[0006] An optical component mounting structure according to one embodiment includes an optical component, a pressing plate, a housing, and an applying portion. The optical component is capable of transmitting light. The pressing plate is elastically deformable and presses the optical component in a first direction. The housing includes a storage portion for storing the optical component, and a fixing portion that is provided on a peripheral wall portion surrounding the storage portion and fixes the pressing plate. The applying portion is provided outside the fixing portion of the housing in a second direction intersecting with the first direction. Furthermore, the applying portion applies force to both ends of the pressing plate in the second direction such that a center portion of the pressing plate in the second direction is closer to the optical component in the first direction than both ends in the second direction.

[0007] An optical device of one embodiment includes the optical component mounting structure of the above embodiment, and a light receiving section that receives light that has passed through the optical component. Effect of the Invention

[0008] According to the present invention, it is possible to suppress misalignment of the optical component with respect to the housing. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a vertical cross-sectional view of the camera module according to the first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the camera module shown in FIG. [Diagram 3] FIG. 3 is a perspective view showing the internal structure of a shutter unit provided in the camera module. [Figure 4] FIG. 4 is a perspective view showing a state in which the shutter member of the shutter unit shown in FIG. 3 has been removed. [Diagram 5] FIG. 5 is a plan view showing a state in which the filter and the pressing plate are attached to the housing. [Figure 6] FIG. 6 is a plan view of the housing with the filter and the retaining plate removed. [Figure 7]7 is a perspective view showing the arrangement relationship of the housing, the filter and the pressing plate shown in FIG. [Figure 8] FIG. 8 is a plan view showing a state in which the four pedestals of the housing shown in FIG. 7 are positioned asymmetrically with respect to the center position of the pressing plate. [Figure 9] FIG. 9 is a plan view showing a state in which four pedestal portions of a housing according to a modified example of the first embodiment are positioned line-symmetrically with respect to the center position of a pressing plate. [Figure 10] FIG. 10 is a vertical cross-sectional view (cross-sectional view taken along line AA in FIG. 8) showing a state in which the central portion of the long side of the pressing plate is bent when it receives a reaction force from the base portion of the housing in the camera module according to the first embodiment. [Figure 11] FIG. 11 is a vertical cross-sectional view showing a state in which the center portion on the short side of the pressing plate is bent when the pressing plate receives a reaction force from the base portion of the housing in the camera module according to the first embodiment. [Figure 12] FIG. 12 is an enlarged cross-sectional view showing a state in which a magnet of the camera module according to the second embodiment applies a force to an end of a pressing plate. [Figure 13] FIG. 13 shows a modification in which the base and the pressing plate shown in FIG. 9 have four corners. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention and modifications will be described in detail with reference to the drawings. In all drawings referred to in describing each embodiment and each modification, the same or substantially the same configurations and elements are designated by the same reference numerals. In addition, as a rule, configurations and elements that have been described once will not be described repeatedly. 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 represent a specific order or sequence.

[0011] [Each configuration of the first embodiment] FIG. 1 shows a camera module 10 according to a first embodiment.

[0012] [Camera module] The camera module 10 is an example of an optical device. The camera module 10 includes a filter mounting structure 60 and an image sensor 36. The filter mounting structure 60 is an example of an optical component mounting structure.

[0013] 2, camera module 10 has lens barrel 12, a sensor substrate 32, and a shutter unit 40. Sensor substrate 32 includes an image sensor 36. Shutter unit 40 includes a filter attachment structure 60 (FIG. 1). Shutter unit 40 is housed inside lens barrel 12. With shutter unit 40 housed inside lens barrel 12, sensor substrate 32 closes the rear end of lens barrel 12.

[0014] <Lens barrel> As shown in FIG. 1, the lens barrel 12 has a holder body 14, lenses 18 and 22, a spacer 24, and a ring member 26.

[0015] The holder body 14 is made of resin, for example. The holder body 14 has a unit accommodating portion 15 and a lens holder 16, each of which is formed in a cylindrical shape and integrated with one another. The unit accommodating portion 15 has an inner diameter larger than that of the lens holder 16. The unit accommodating portion 15 accommodates a shutter unit 40. The lens holder 16 accommodates lenses 18, 22, a spacer 24, and a ring member 26.

[0016] The outer periphery of each of the lenses 18 and 22 is held by the lens holder 16. The lenses 18 and 22 are located on the same optical axis K. In FIG. 1, the optical axis K is indicated by a dashed line. The direction along the optical axis K is defined as the front-rear direction (optical axis direction). The front-rear direction is an example of a first direction. Two directions perpendicular to the front-rear direction are defined as the up-down direction and the left-right direction. The up-down direction and the left-right direction are examples of a second direction intersecting with the first direction. An oblique direction intersecting with both the up-down direction and the left-right direction is also included in the example of the second direction. The lens 18 is located in front of the lens 22. The left side and the right side refer to the left side and the right side when the sensor substrate 32 is viewed from the lens 18 side.

[0017] Hereinafter, the arrangement of each part of the camera module 10 will be described assuming that the front-rear direction is arranged along the horizontal direction. Note that the front-rear direction, left-right direction, and up-down direction are directions set as examples to explain the arrangement relationship of each part of the camera module 10. For this reason, the optical axis direction is not limited to the horizontal direction, and may be a vertical direction or an oblique direction intersecting with the left-right direction and up-down direction.

[0018] The spacer 24 is located between the lens 18 and the lens 22 on the optical axis K, and is in contact with the lens 18 and the lens 22. In other words, the spacer 24 maintains a predetermined distance between the lens 18 and the lens 22 on the optical axis K. The ring member 26, together with the spacer 24, sandwiches the lens 18, thereby restricting deviation of the lens 18 in the direction along the optical axis K.

[0019] <Sensor board> The sensor board 32 includes a board 34 provided with a wiring pattern (not shown), and an imaging element 36 attached to the board 34. The board 34 has a rectangular outer shape when viewed from the front-rear direction. The board 34 has a front surface 34A and a rear surface 34B aligned in the front-rear direction. The outer periphery of the front surface 34A is defined as an edge portion 35. The edge portion 35 is fixed (bonded) to the rear surface 15A of the unit accommodating section 15.

[0020] The imaging element 36 is fixed to the center in the up-down and left-right directions of the front surface 34A. The imaging element 36 is an example of a light receiving unit that receives light that has passed through a filter 62, which will be described later. The imaging element 36 also has an imaging surface 37 on which the light that has passed through the filter 62 forms an image.

[0021] <Shutter unit> 1, the shutter unit 40 includes a shutter mechanism section 42 and a filter mounting structure 60. The shutter mechanism section 42 is accommodated in a housing 72 of the filter mounting structure 60, which will be described later.

[0022] <<Shutter mechanism>> As shown in Fig. 2, the shutter mechanism section 42 has a blade retainer 44. As shown in Fig. 3, the shutter mechanism section 42 has a first blade 46, a second blade 47, and a partition plate 48. As shown in Fig. 4, the shutter mechanism section 42 has a coil base 52, a yoke 53, a rotor magnet 54, a lever blade 56, and a link lever 58.

[0023] 2, the blade holder 44 is a plate-like member having an opening 44A that opens in the front-rear direction. The size and shape of the opening 44A are set so as to allow the passage of a necessary amount of light to be imaged on the imaging element 36. The blade holder 44 is attached to the front end of the housing 72, which will be described later, and covers the other members of the shutter mechanism section 42 from the front side.

[0024] As shown in Fig. 3, two first blades 46 and two second blades 47 are provided on the rear side of the blade holder 44 (Fig. 2). Specifically, the two first blades 46 and the two second blades 47 are each provided so as to be rotatable (movable) around a pin 49 extending in the front-rear direction. In the shutter unit 40, the two first blades 46 and the two second blades 47 are reciprocated to switch between a passing state in which light can reach the imaging element 36 (Fig. 2) and a blocking state in which light does not reach the imaging element 36.

[0025] A partition plate 48 is provided behind the two first blades 46 and the two second blades 47. The partition plate 48 divides a space in the housing 72 in which the two first blades 46 and the two second blades 47 are provided from a space in which a lever blade 56 (FIG. 4) described below and the like are provided. The partition plate 48 is provided with an opening 48A that opens in the front-rear direction.

[0026] 4 shows the configuration of the shutter unit 40 with the partition plate 48 (FIG. 3) removed. The coil base 52 is provided, as an example, in the lower part of the housing 72. The coil base 52 generates a magnetic field when electricity is passed through the coil through wiring (not shown). The yoke 53 is provided on the coil base 52. The rotor magnet 54 is rotationally driven by the action of the magnetic field generated in the coil base 52.

[0027] The lever blade 56 is a plate-like member and has an L-shaped outer shape when viewed from the front-rear direction. A part of the lever blade 56 is connected to the rotor magnet 54. As a result, when the rotor magnet 54 is driven to rotate, the lever blade 56 swings. The link lever 58 is connected to a part of the lever blade 56. The link lever 58 transmits a force generated by the swing of the lever blade 56 to the first blade 46 (FIG. 3) and the second blade 47 (FIG. 3). In this way, the first blade 46 and the second blade 47 are rotated in accordance with the rotational drive of the rotor magnet 54, so that the shutter unit 40 can be switched between passing light and blocking light.

[0028] <<Filter mounting structure>> 5 is an example of an optical component mounting structure. The filter mounting structure 60 includes a filter 62, a pressing plate 64, a housing 72, and an attachment portion 91 (FIG. 6).

[0029] <<<Filter>>> The filter 62 shown in FIG. 7 is an example of an optical component capable of transmitting light, and is configured as a flat glass filter. The filter 62 selectively absorbs light and transmits light in a preset wavelength range. The filter 62 has a substantially rectangular outer shape. Among the outer peripheral portions of the filter 62, the long side portion LS extends along the left - right direction. Among the outer peripheral portions of the filter 62, the short side portion SS extends along the up - down direction. Let the thickness of the filter 62 in the front - rear direction be t1.

[0030] Also, the filter 62 has an upper end face 62A, a lower end face 62B, a left end face 62C, and a right end face 62D. The upper end face 62A and the lower end face 62B are included in the long side portion LS. The left end face 62C and the right end face 62D are included in the short side portion SS. Note that the front - rear direction is an example of the thickness direction of the filter 62. Let the front side surface of the filter 62 be the surface 62E.

[0031] <<<Pressing plate>>> The pressing plate 64 is, for example, made of sheet metal and has a thickness t2 (<t1) in the front - rear direction. The pressing plate 64 is elastically deformable in the front - rear direction. In other words, the pressing plate 64 has elasticity and is a member capable of pressing the filter 62 in the front - rear direction. Specifically, the pressing plate 64 presses the filter 62 toward the housing 72. The surface located at the rear end of the pressing plate 64 is referred to as the rear surface 64E (FIG. 10). The rear surface 64E is an example of a pressing surface. Also, the surface located at the front end of the pressing plate 64 is referred to as the front surface 64F. The front surface 64F is an example of the surface on the opposite side of the pressing surface.

[0032] The pressing plate 64 is a frame member having a square outer shape. The pressing plate 64 has, for example, a substantially rectangular outer shape. In the pressing plate 64, the length in the left - right direction is longer than the length in the up - down direction. The pressing plate 64 has an opening 65, fixing holes 66A, 66B, 66C, 66D, an outer peripheral portion 67, through - holes 68, and through - hole 69. The opening 65, the fixing holes 66A, 66B, 66C, 66D, the through - holes 68, and the through - hole 69 each penetrate the pressing plate 64 in the front - rear direction. The opening 65 has a size that does not block the light imaged on the imaging surface 37 (FIG. 1).

[0033] The pressure plate 64 has an upper frame portion 64A, a lower frame portion 64B, a left frame portion 64C, and a right frame portion 64D. The upper frame portion 64A is located on the upper side relative to the opening 65. The lower frame portion 64B is located on the lower side relative to the opening 65. The upper frame portion 64A and the lower frame portion 64B are an example of two long side portions. The left frame portion 64C is located on the left side relative to the opening 65. The right frame portion 64D is located on the right side relative to the opening 65. The left frame portion 64C and the right frame portion 64D are an example of two short side portions.

[0034] The minimum width W1 in the up-down direction of each of the upper frame portion 64A and the lower frame portion 64B is smaller than the width W2 in the left-right direction of each of the left frame portion 64C and the right frame portion 64D. Note that the respective widths of the upper frame portion 64A, the lower frame portion 64B, the left frame portion 64C, and the right frame portion 64D may be the same or different.

[0035] The fixing hole 66A is provided in the upper part of the left frame portion 64C. The fixing hole 66B is provided in the lower part of the left frame portion 64C. The through hole 68 is provided in the vertical center part of the left frame portion 64C. The through hole 68 is a long hole extending in the left-right direction. The fixing hole 66C is provided in the upper part of the right frame portion 64D. The fixing hole 66D is provided in the lower part of the right frame portion 64D. The through hole 69 is provided in the vertical center part of the right frame portion 64D. In this way, the left frame portion 64C and the right frame portion 64D each have a through hole.

[0036] When viewed from the front-rear direction, which is the thickness direction of the pressing plate 64, the outer circumferential portion 67 includes arcuate portions 67A, 67B, 67C, and 67D. Arcuate portion 67A forms part of the periphery of fixing hole 66A. Arcuate portion 67B forms part of the periphery of fixing hole 66B. Arcuate portion 67C forms part of the periphery of fixing hole 66C. Arcuate portion 67D forms part of the periphery of fixing hole 66D.

[0037] In the following description, the center of the presser plate 64 in the left-right direction is designated M1, both ends are designated TA and TB, and the center of the presser plate 64 in the up-down direction is designated M2, both ends are designated TC and TD.

[0038] As shown in Fig. 5, the pressing plate 64 is located in front of the filter 62. When the filter 62 and the pressing plate 64 are viewed from the front, the upper frame portion 64A and the lower frame portion 64B overlap with the long side portion LS (Fig. 7). The left frame portion 64C and the right frame portion 64D overlap with the short side portion SS (Fig. 7). In this way, the pressing plate 64 can press the filter 62 in the front-rear direction.

[0039] <<<Housing>>> 6 and 7, the housing 72 has a housing main body 74. The housing main body 74 is a box-shaped member that opens toward the front. A hole 75 that penetrates the housing main body 74 in the front-rear direction is provided in the center of the housing main body 74 in the up-down and left-right directions. As an example, the hole 75 has the same shape and size as the opening 65 (FIG. 7) when viewed from the front-rear direction. The housing main body 74 is provided with an accommodating portion 76 and a fixing portion 82.

[0040] <<<<Containment section>>>> As an example, the accommodating portion 76 is a stepped portion formed on the periphery of the hole 75 in the housing main body 74. The filter 62 (FIG. 7) is accommodated in the accommodating portion 76, and a rear end surface 63 (FIG. 1) of the filter 62 is fixed (bonded) to the accommodating portion 76. When viewed from the front side, a portion of the housing main body 74 that surrounds the accommodating portion 76 is a peripheral wall portion 77.

[0041] As shown in FIG. 7, the peripheral wall portion 77 has a bottom surface 78. The bottom surface 78 is, for example, a flat surface along the up-down and left-right directions. When the filter 62 is fixed to the storage portion 76, the bottom surface 78 is located around the filter 62. A pin 79 is provided on the left side of the bottom surface 78 with respect to the optical axis K (FIG. 1). The pin 79 protrudes forward from the center of the bottom surface 78 in the up-down direction. A pin 81 is provided on the right side of the bottom surface 78 with respect to the optical axis K. The pin 81 protrudes forward from the center of the bottom surface 78 in the up-down direction. In this manner, the housing 72 is provided with the columnar pins 79 and 81.

[0042] 5, when the filter 62 is accommodated in the accommodation portion 76, the pin 79 is inserted into the through hole 68. The pin 81 is inserted into the through hole 69. This restricts the rotation and sliding of the pressing plate 64 in a plane perpendicular to the front-rear direction. In other words, the pressing plate 64 is positioned by the pins 79 and 81. The pin 79 is an example of a positioning portion that can be inserted into the through hole 68. The pin 81 is an example of a positioning portion that can be inserted into the through hole 69.

[0043] <<<<Fixed part>>>> 6, the fixing portion 82 is provided on the peripheral wall portion 77. The fixing portion 82 is a portion to which the pressing plate 64 (FIG. 5) is fixed. The fixing portion 82 has pillar portions 83, 84, 85, and 86, for example.

[0044] The pillar portions 83, 84, 85, and 86 each extend forward from the bottom surface 78 with the front-rear direction as the axial direction. As an example, the pillar portions 83, 84, 85, and 86 are formed in a cylindrical shape. The pillar portions 83, 84, 85, and 86 each have approximately the same outer diameter. The pillar portions 83, 84, 85, and 86 can be inserted into the fixing holes 66A, 66B, 66C, and 66D (FIG. 7) before a flange 87, which will be described later, is formed.

[0045] Pillar portion 83 is located above pin 79. Pillar portion 84 is located below pin 79. Pillar portion 83 and pillar portion 84 are lined up in the vertical direction. Pillar portion 85 is located above pin 81. Pillar portion 86 is located below pin 81. Pillar portion 85 and pillar portion 86 are lined up in the vertical direction.

[0046] With the pressing plate 64 (FIG. 5) in contact with the bottom surface 78, one axial end (front end) of each of the columnar parts 83, 84, 85, and 86 is melted by a heating tool (not shown). This causes the front end of each of the columnar parts 83, 84, 85, and 86 to be enlarged in diameter, forming a flange 87. In other words, the flange 87 is an enlarged part that extends radially outward from the front end of each of the columnar parts 83, 84, 85, and 86. In this manner, the fixing part 82 has the flange 87. Each of the flanges 87 restricts the pressing plate 64 from moving forward. In other words, each of the flanges 87 fixes the pressing plate 64 in the front-rear direction.

[0047] <<<Addition part>>> As shown in FIG. 6, the applying portion 91 is provided on the outer side (opposite side to the optical axis K) of the fixing portion 82 of the housing 72 in the oblique direction passing through the optical axis K. The applying portion 91 applies force to both ends TA and TB in the left-right direction of the pressing plate 64 (FIG. 7) so that a center portion M1 in the left-right direction of the pressing plate 64 (FIG. 7) is closer to the filter 62 (FIG. 7) in the front-rear direction than both ends TA and TB in the left-right direction. The applying portion 91 also applies force to both ends TC and TD in the up-down direction of the pressing plate 64 so that a center portion M2 in the up-down direction of the pressing plate 64 is closer to the filter 62 in the front-rear direction than both ends TC and TD in the up-down direction. The applying portion 91 has a support portion 92, for example. The support portion 92 is provided on the peripheral wall portion 77 and supports the pressing plate 64 from the rear side.

[0048] As shown in FIG. 8, the support portion 92 has pedestals 93, 94, 95, and 96. That is, the number of pedestals is, for example, four. When viewed from the front-rear direction, the pedestals 93, 94, 95, and 96 are each formed in an arc shape. The pedestal 93 faces a part of the outer circumferential surface of the pillar portion 83 in the radial direction. The pedestal 94 faces a part of the outer circumferential surface of the pillar portion 84 in the radial direction. The pedestal 95 faces a part of the outer circumferential surface of the pillar portion 85 in the radial direction. The pedestal 96 faces a part of the outer circumferential surface of the pillar portion 86 in the radial direction.

[0049] The base 93 supports the arcuate portion 67A of the pressing plate 64 from the rear side. The base 94 supports the arcuate portion 67B from the rear side. The base 95 supports the arcuate portion 67C from the rear side. The base 96 supports the arcuate portion 67D from the rear side. The bases 93, 94, 95, and 96 are positioned asymmetrically with respect to imaginary lines C1 and C2 perpendicular to the optical axis K. Specifically, the bases 93 and 94, and the bases 95 and 96 are positioned asymmetrically with respect to the imaginary line C1. The bases 93 and 95, and the bases 94 and 96 are positioned asymmetrically with respect to the imaginary line C2. In addition, the position of the base 95 is lower than the position of the base 93 in the vertical direction. The position of the base 96 is lower than the position of the base 94 in the vertical direction.

[0050] Fig. 10 shows, as an example, a cross-sectional view taken along line AA in Fig. 8. Fig. 10 also shows an enlarged view of a portion including the base 93 and the periphery of the base 93. Here, the base 93 of the support portion 92 will be described. The base 93 (support portion 92) has a support surface 98 located at the front end. In the front-rear direction, a first height h1 from the peripheral wall portion 77 to the support surface 98 is higher than a second height h2 from the peripheral wall portion 77 to the surface 62E of the filter 62.

[0051] [Operation of the first embodiment] The operation of the filter mounting structure 60 and the camera module 10 according to the first embodiment will be described. Note that, for the pressing plate 64, the upper frame portion 64A and the lower frame portion 64B, and the left frame portion 64C and the right frame portion 64D have the same configuration. Therefore, for the pressing plate 64, the upper frame portion 64A and the left frame portion 64C will be described, and the description of the lower frame portion 64B and the right frame portion 64D will be omitted.

[0052] FIG. 10 shows a portion of the filter mounting structure 60 including the upper frame portion 64A. In the assembly process of the filter mounting structure 60, the filter 62 is accommodated in the accommodation portion 76 of the housing 72. The pressing plate 64 is pressed against the surface 62E of the filter 62 from the front side. At this time, the pillar portion 83 is inserted into the fixing hole 66A, and the pillar portion 85 is inserted into the fixing hole 66C. Then, the front end portion of the pillar portion 83 and the front end portion of the pillar portion 85 are melted by heating with a jig (not shown) and expanded in diameter. As a result, the pillar portion 83 and the pillar portion 85 each have a flange 87. The flange 87 prevents the pressing plate 64 from coming off in the front-rear direction, and the upper frame portion 64A is fixed to the housing 72.

[0053] Here, the right end of the upper frame portion 64A is located to the right (outside) of the flange 87, and has a degree of freedom of deformation in the front-rear direction. Therefore, when the right end of the upper frame portion 64A comes into contact with the support surface 98, a reaction force indicated by an arrow F acts on the right end of the upper frame portion 64A, causing the right end to deform toward the front. A similar reaction force also acts on the left end of the upper frame portion 64A.

[0054] In the presser plate 64, as the right and left ends of the upper frame portion 64A each attempt to deform forward, the portion between the pillar portion 84 and the pillar portion 85 (the center portion in the left-right direction) attempts to deform rearward. Specifically, a bending moment indicated by arrow M acts on the right end of the upper frame portion 64A. A bending moment in the opposite direction to that of arrow M acts on the left end of the upper frame portion 64A. As a result, the center portion in the left-right direction of the upper frame portion 64A bends so as to come closer to the filter 62 in the front-rear direction than the two end portions, and the presser plate 64 presses the filter 62 rearward.

[0055] 11 shows a portion of the filter mounting structure 60 including the left frame portion 64C. The pressing plate 64 is pressed against the surface 62E of the filter 62 from the front side. At this time, the pillar portion 83 is inserted into the fixing hole 66A, and the pillar portion 84 is inserted into the fixing hole 66B. Then, the front end portion of the pillar portion 83 and the front end portion of the pillar portion 84 are melted by heating with a jig (not shown) and expanded in diameter. As a result, a flange 87 is formed on each of the pillar portions 83 and 84. The flange 87 prevents the pressing plate 64 from coming off in the front-rear direction, and the left frame portion 64C is fixed to the housing 72.

[0056] Here, the upper end of the left frame portion 64C is located above (outside) the flange 87 and has a degree of freedom of deformation. Therefore, when the upper end of the left frame portion 64C comes into contact with the support surface 98, the upper end of the left frame portion 64C is subjected to a reaction force indicated by arrow F, which causes the upper end to deform forward. A similar reaction force also acts on the lower end of the left frame portion 64C.

[0057] In the presser plate 64, as the upper and lower ends of the left frame portion 64C each attempt to deform forward, the portion between the pillar portion 83 and the pillar portion 84 (the central portion in the up-down direction) attempts to deform rearward. Specifically, a bending moment indicated by arrow M acts on the upper end of the left frame portion 64C. A bending moment in the opposite direction to that of arrow M acts on the lower end of the left frame portion 64C. As a result, the central portion in the up-down direction of the left frame portion 64C bends so as to come closer to the filter 62 in the front-to-rear direction than the two end portions, and the presser plate 64 presses the filter 62 rearward.

[0058] Although a through hole 69 is formed in the vertical center of the left frame portion 64C, the contact area between the through hole 69 and the pin 79 is smaller than in a configuration in which the pin 79 is press-fitted into the through hole. Therefore, in the vertical center of the pressing plate 64, bending toward the filter 62 is less likely to be suppressed by contact with the pin 79.

[0059] The operations of the filter mounting structure 60 and the camera module 10 will be summarized below with reference to FIGS. 1 to 8, 10 and 11.

[0060] In the filter mounting structure 60, a plate-shaped filter 62 is accommodated in the accommodation portion 76 of the housing 72. The pressing plate 64 is provided on the fixing portion 82 to press the filter 62 against the accommodation portion 76. The applying portion 91 is provided on the outer side in the left-right direction and in the up-down direction of the fixing portion 82 of the housing 72. The applying portion 91 applies force to both ends TA, TB so that a left-right center portion M1 of the pressing plate 64 is closer to the filter 62 in the front-rear direction than both ends TA, TB in the left-right direction. Furthermore, the applying portion 91 applies force to both ends TC, TD so that a up-down center portion M2 is closer to the filter 62 in the front-rear direction than both ends TC, TD in the up-down direction.

[0061] The central portion of the elastically deformable pressing plate 64 bends so as to approach the filter 62 in the front-rear direction more than both ends of the pressing plate 64 in the left-right and up-down directions. This increases the contact area between the pressing plate 64 and the filter 62, and presses the filter 62 toward the housing portion 76. In this way, the central portion of the pressing plate 64 in the left-right direction and the up-down direction can be prevented from moving away from the filter 62, thereby preventing the filter 62 from shifting out of position with respect to the housing 72.

[0062] In the filter mounting structure 60, the applying portion 91 is formed by providing a support portion 92 having a support surface 98 whose position in the thickness direction (front-rear direction) is determined in advance on the peripheral wall portion 77 of the housing 72. Specifically, the applying portion 91 is formed so that the first height h1 is higher than the second height h2. This makes it possible to warp the edge of the pressing plate 64 with a simpler structure than when the applying portion 91 is configured using a member other than the housing 72.

[0063] In the filter mounting structure 60, the pressing plate 64 has arcuate portions 67A, 67B, 67C, and 67D, so that a force for warping the pressing plate 64 can be applied to four points on the edge of the pressing plate 64. This makes it easier to warp the pressing plate 64 compared to a configuration in which the pressing plate 64 is supported by a single support portion 92. Furthermore, since the pressing plate 64 is supported at four points, it is easier to stabilize the position of the pressing plate 64.

[0064] The position of the pressing plate 64 is determined with respect to the pins 79 and 81 by inserting the columnar pins 79 and 81 into the through holes 69 and 68. It is considered that the amount of deflection occurring at the center of the pressing plate 64 in the left-right direction and the up-down direction is larger in the long side portion LS with a longer fulcrum interval than in the short side portion SS with a shorter fulcrum interval, before the applying portion 91 applies force to the pressing plate 64. Here, in the filter mounting structure 60, the pins 79 and 81 position the pressing plate 64 on the short side portion SS side, so that the pins 79 and 81 are less likely to apply force to the long side portion LS. In other words, the pins 79 and 81 are less likely to suppress the force of the applying portion 91 acting on the long side portion LS, so that the pressing force of the pressing plate 64 on the filter 62 can be suppressed from becoming smaller.

[0065] In the filter mounting structure 60, the base portions 93, 94, 95, and 96 are disposed asymmetrically with respect to the center position (optical axis K) of the pressing plate 64 when viewed in the thickness direction (front-rear direction). This eliminates the need to symmetrically dispose the base portions 93, 94, 95, and 96 in regard to the arrangement of each part of the housing 72, thereby increasing the degree of freedom in the layout of each part of the housing 72.

[0066] In the camera module 10, the pressing plate 64 appropriately presses the filter 62, thereby suppressing misalignment and tilt of the filter 62 from the design center of its arrangement. This makes it possible to prevent the amount of light passing through the filter 62 and entering the image sensor 36 from becoming less than the set amount.

[0067] [Modification of the first embodiment] Fig. 9 shows a filter mounting structure 100 as a modified example of the filter mounting structure 60 (Fig. 8). The filter mounting structure 100 is provided in the camera module 10 (Fig. 1) in place of the filter mounting structure 60. Note that the same components as those in the camera module 10 are denoted by the same reference numerals as those in the camera module 10 and descriptions thereof will be omitted.

[0068] The filter mounting structure 100 includes a filter 62, a pressing plate 102, a housing 72, and an attachment portion 106. The pressing plate 102 is formed in a substantially rectangular shape with its long sides in the left-right direction and its short sides in the up-down direction. The pressing plate 102 has an outer periphery 103 including four arc portions 104. The four arc portions 104 have the same radius of curvature when viewed from the front-rear direction. In other words, the four arc portions 104 are provided on the pressing plate 102 so as to be symmetrical in the up-down direction and the left-right direction.

[0069] The application portion 106 has a support portion 108 provided on the peripheral wall portion 77 and supporting the pressing plate 102. The support portion 108 has base portions 109A, 109B, 109C, and 109D. The base portions 109A, 109B, 109C, and 109D are positioned line-symmetrically with respect to the imaginary lines C1 and C2. Specifically, the base portions 109A and 109B, and the base portions 109C and 109D are positioned line-symmetrically with respect to the imaginary line C1. The base portions 109A and 109C, and the base portions 109B and 109D are positioned line-symmetrically with respect to the imaginary line C2. In other words, the base portions 109A, 109B, 109C, and 109D have the same outer shape and the same size, for example.

[0070] In the filter mounting structure 100, the four arcuate portions 104 are supported by the base portions 109A, 109B, 109C, and 109D and receive a reaction force. As a result, the pressing plate 102 is bent so that the center portion in the left-right direction and the center portion in the up-down direction of the pressing plate 102 move toward the filter 62. Here, the base portions 109A, 109B, 109C, and 109D are positioned symmetrically with respect to the center position of the pressing plate 102 when viewed in the thickness direction. This makes it easier to press each portion of the pressing plate 102 with an equal force compared to a configuration in which multiple base portions are arranged asymmetrically.

[0071] [Configurations of the second embodiment] Fig. 12 shows a portion of a filter mounting structure 110 of the second embodiment. The filter mounting structure 110 is provided in the camera module 10 (Fig. 1) in place of the filter mounting structure 60 (Fig. 1). Note that configurations and elements that are the same or substantially the same as those in the filter mounting structure 60 are given the same reference numerals and descriptions thereof will be omitted.

[0072] <<Filter mounting structure>> The filter mounting structure 110 includes a filter 62, a pressing plate 112 that presses the filter 62, a housing 72 that houses the filter 62, and an applying portion 114 that applies force to the edge of the pressing plate 112. Note that the filter mounting structure 110 has the same structure in each pillar portion. For this reason, the filter mounting structure 110 will be illustrated and described only in terms of the structure of the periphery of the pillar portion 83, and descriptions of other portions will be omitted.

[0073] <<<Pressing plate>>> The pressing plate 112 has, for example, a shape similar to that of the pressing plate 64 (FIG. 1). The pressing plate 112 is an iron plate that is elastically deformable and magnetic.

[0074] <<<Addition part>>> The application portion 114 is provided outside the fixed portion 82 of the housing 72 in the left-right and up-down directions. The application portion 114 has a mounting wall 115 and a magnet 118 fixed to the mounting wall 115. The mounting wall 115 has a wall portion 115A extending forward from the peripheral wall portion 77, and a protruding portion 115B extending downward from the wall portion 115A. The protruding portion 115B is provided with an opposing surface 116 that faces the peripheral wall portion 77 in the front-rear direction.

[0075] The magnet 118 is formed in a rectangular parallelepiped shape and includes a front surface 118A and a rear surface 118B. The front surface 118A is adhered to the opposing surface 116. The rear surface 118B is positioned at a distance in the front-rear direction from the top-bottom ends of the pressing plate 112. The magnet 118 attracts the edges of the pressing plate 112 forward by magnetic force.

[0076] [Operation of the second embodiment] The operation of the filter mounting structure 110 according to the second embodiment will be described.

[0077] 12, a pressing plate 112 is provided on the fixing portion 82 to press the filter 62 against the accommodation portion 76. Here, the applying portion 114 is provided outside the fixing portion 82 of the housing 72 in the left-right direction and the up-down direction. The applying portion 114 applies a force (attraction force) to the edge of the pressing plate 112 so that the edge of the pressing plate 112 is warped away from the peripheral wall portion 77.

[0078] The left-right and up-down central portions of the elastically deformable pressing plate 112 bend toward the filter 62 as the edge of the pressing plate 112 warps away from the peripheral wall portion 77. Then, the contact area between the pressing plate 112 and the filter 62 increases, and the filter 62 is pressed toward the accommodation portion 76. In this way, the left-right and up-down central portions of the edge of the pressing plate 112 can be prevented from bending away from the filter 62, so that the filter 62 can be prevented from shifting out of position with respect to the housing 72.

[0079] Furthermore, in the filter mounting structure 110, the magnitude of the magnetic force acting on the pressing plate 112 can be changed by replacing the magnet 118. Specifically, by replacing the magnet 118, the magnitude of the magnetic force acting on the pressing plate 112 changes, and the amount of warping of the edge portion of the pressing plate 112 changes. This makes it possible to easily manage the amount of warping of the pressing plate 112 within an appropriate range, since there is no need to change the design (replace) of the housing 72 when bending the center portion in the left-right direction and the center portion in the up-down direction of the pressing plate 112 toward the filter 62.

[0080] [Modifications] Modifications of the first and second embodiments will be described below. Note that components that are the same as or similar to those in the first and second embodiments will be given the same reference numerals and descriptions thereof will be omitted.

[0081] 13 shows a filter mounting structure 120 as a modified example of the filter mounting structure 100 (FIG. 9). The filter mounting structure 120 includes the filter 62, a pressing plate 122 that presses the filter 62, the housing 72, and an applying portion 126 that applies force to the edge of the pressing plate 122.

[0082] The pressing plate 122 is formed in a rectangular shape with its long sides in the left-right direction and its short sides in the up-down direction. The pressing plate 122 has an outer periphery 123 that includes four corners 124. The four corners 124 are aligned at 90 degrees. In other words, the four corners 124 are provided on the pressing plate 122 so as to be line-symmetrical with respect to the imaginary lines C1 and C2 in the up-down direction and the left-right direction.

[0083] The application portion 126 has a support portion 128 that is provided on the peripheral wall portion 77 and supports the pressing plate 122. The support portion 128 has base portions 129A, 129B, 129C, and 129D. The base portions 129A, 129B, 129C, and 129D are positioned line-symmetrically with respect to the imaginary lines C1 and C2. In addition, the base portions 129A, 129B, 129C, and 129D have the same L-shape in outer shape and the same size, for example.

[0084] In the filter mounting structure 120, the four corners 124 are supported by the bases 129A, 129B, 129C, and 129D and receive a reaction force. Therefore, the pressing plate 122 is bent so that the center part M1 in the left-right direction and the center part M2 in the up-down direction of the pressing plate 122 move toward the filter 62. Here, the bases 129A, 129B, 129C, and 129D are positioned line-symmetrically with respect to the imaginary lines C1 and C2. This makes it easier to press each part of the pressing plate 122 with an equal force compared to a configuration in which multiple bases are arranged asymmetrically.

[0085] <Other Modifications> The present invention is not limited to the above-described embodiments and modifications, and it goes without saying that various modifications, such as combinations, are possible without departing from the spirit of the present invention.

[0086] In the filter mounting structure 60, the fixing portion 82 may also serve as a positioning portion for the pressing plate 64. The shape of the positioning portion is not limited to a columnar shape such as a pin, but may be a groove shape. Furthermore, the fixing portion is not limited to a portion in which the front end portion is melted with a jig to form the flange 87, as in the case of the fixing portion 82, but may be a screw. In other words, the pressing plate 64 may be fixed by the head of the screw.

[0087] The imaginary lines C1 and C2 are not limited to those perpendicular to the optical axis K, but may be imaginary lines forming an angle with the optical axis K other than 90°.

[0088] The optical component is not limited to the filter 62 that selectively transmits light, but may be a transparent member such as a glass plate or an acrylic plate that transmits light.

[0089] The presser plate is not limited to having a rectangular outer shape like presser plate 122. At least one of the set of short side portions SS and the set of long side portions LS may have a different length. For example, the presser plate may have a trapezoidal outer shape. The presser plate may have a polygonal outer shape having five or more arc portions or five or more corner portions. The presser plate may have an outer shape that combines multiple corners and multiple arc portions.

[0090] The plurality of pedestals may be positioned symmetrically only in the up-down direction or only in the left-right direction with respect to the center position of the presser plate when viewed in the thickness direction of the presser plate. Also, a first magnet may be provided at the end of the presser plate, and the plurality of pedestals may be composed of second magnets, and the central portion of the presser plate may be deflected by utilizing the repulsive force between the first magnet and the second magnet.

[0091] The number of positioning portions that position the presser plate and the number of applying portions that apply force to both ends of the presser plate in the second direction are not limited to the above-mentioned numbers, and may be any number of each. Furthermore, the number of arc portions and corner portions of the presser plate may be any number. In addition, the combination of the numbers of positioning portions, applying portions, arc portions, and corner portions may be different from the above-mentioned combinations.

[0092] The optical device is not limited to an image capturing device such as the camera module 10, but may be, for example, a measuring device that measures the amount of light.

[0093] The present technology can be configured as follows. (1) An optical component capable of transmitting light; a pressing plate that is elastically deformable and presses the optical component in a first direction; a housing including a storage section for storing the optical component and a fixing section provided on a peripheral wall surrounding the storage section and for fixing the pressing plate; an applying portion that is provided outside the fixed portion of the housing in a second direction intersecting the first direction, and applies a force to both ends of the pressing plate in the second direction such that a central portion of the pressing plate in the second direction is closer to the optical component in the first direction than both ends of the pressing plate in the second direction; Equipped with Optical component mounting structure. (2) The application portion has a support portion that is provided on the peripheral wall portion and supports the pressing plate, In the first direction, a first height from the peripheral wall portion to a support surface of the support portion is higher than a second height from the peripheral wall portion to a surface of the optical component. The optical component mounting structure described in (1) above. (3) the pressing plate has an outer periphery including a plurality of corners or a plurality of arcuate portions as viewed from the first direction, The support portion has a plurality of pedestals that support the plurality of corner portions or the plurality of arc portions. The optical component mounting structure described in (2) above. (4) The pressing plate has a rectangular outer shape, The number of the plurality of pedestals is four. The optical component mounting structure described in (3) above. (5) The presser plate has two short sides and two long sides, Each of the two short side portions is provided with a through hole, The peripheral wall portion is provided with a columnar positioning portion that can be inserted into the through hole. The optical component mounting structure according to any one of (1) to (4). (6) The plurality of pedestals are positioned symmetrically with respect to a virtual line intersecting an optical axis of the optical component. The optical component mounting structure according to (4) or (5) above. (7) The plurality of pedestals are positioned asymmetrically with respect to a virtual line intersecting an optical axis of the optical component. An optical component mounting structure according to any one of (3) to (5). (8) The pressing plate is magnetic, The application unit has a magnet that attracts the pressing plate by magnetic force. The optical component mounting structure according to any one of (1) to (7). (9) An optical component mounting structure according to any one of (1) to (8), a light receiving unit that receives light that has passed through the optical component; having optical equipment. [Explanation of symbols]

[0094] 10...camera module, 12...lens barrel, 14...holder body, 15...unit housing section, 15A...rear surface, 16...lens holder, 18...lens, 22...lens, 24...spacer, 26...ring member, 32...sensor board, 34...board, 34A...front surface, 34B...rear surface, 35...edge, 36...imaging element, 37...imaging surface, 40...shutter unit, 42...shutter mechanism section, 44...blade holder, 44A...opening, 46...first blade, 47...second blade, 48...partition plate, 48A...opening, 49...pin, 52...coil base, 53...yoke, 54...rotor magnet, 56 ...lever blade, 58...link lever, 60...filter mounting structure, 62...filter, 62A...upper end surface, 62B...lower end surface, 62C...left end surface, 62D...right end surface, 62E...surface, 63...rear end surface, 64...pressure plate, 64A...upper frame portion, 64B...lower frame portion, 64C...left frame portion, 64D...right frame portion, 64E...rear surface, 64F...front surface, 65...opening, 66A...fixing hole, 66B...fixing hole, 66C...fixing hole, 66D...fixing hole, 67...outer periphery, 67A...circular portion, 67B...circular portion, 67C...circular portion, 67D...circular portion, 68...through hole, 69...through hole, 72...housing g, 74...housing body, 75...hole portion, 76...accommodating portion, 77...peripheral wall portion, 78...bottom surface, 79...pin, 81...pin, 82...fixing portion, 83...column portion, 84...column portion, 85...column portion, 86...column portion, 87...flange, 91...attachment portion, 92...support portion, 93...base portion, 94...base portion, 95...base portion, 96...base portion, 98...support surface, 100...filter mounting structure, 102...pressing plate, 103...outer periphery, 104...circular arc portion, 106...attachment portion, 108...support portion, 109A...base portion, 109B...base portion, 109C...base portion, 109D...base portion, 110...filter mounting structure, 112...pressing plate, 114...attachment portion, 115...mounting wall, 115A...wall portion, 115B...projection portion, 116...opposing surface, 118...magnet, 118A...front surface, 118B...rear surface, 120...filter mounting structure, 122...pressing plate, 123...periphery, 124...corner portion, 126...applying portion, 128...support portion, 129A...base portion, 129B...base portion, 129C...base portion, 129D...base portion, C1...virtual line, C2...virtual line, F...arrow, h1...first height, h2...second height, K...optical axis, LS...long side portion, M...arrow, M1...center portion, M2...center portion, SS...short side portion, t1...thickness, t2...thickness, TA...both ends, TB...both ends, TC...both ends,TD...both ends, W1...width, W2...width,

Claims

1. An optical component capable of transmitting light; a pressing plate that is elastically deformable and presses the optical component in a first direction; a housing including a storage section for storing the optical component and a fixing section provided on a peripheral wall surrounding the storage section and for fixing the pressing plate; an applying portion that is provided outside the fixed portion of the housing in a second direction intersecting the first direction, and applies a force to both ends of the pressing plate in the second direction such that a central portion of the pressing plate in the second direction is closer to the optical component in the first direction than both ends of the pressing plate in the second direction; Equipped with Optical component mounting structure.

2. The application portion has a support portion that is provided on the peripheral wall portion and supports the pressing plate, In the first direction, a first height from the peripheral wall portion to a support surface of the support portion is higher than a second height from the peripheral wall portion to a surface of the optical component.

2. The optical component mounting structure according to claim 1.

3. the pressing plate has an outer periphery including a plurality of corners or a plurality of arcuate portions as viewed from the first direction, The support portion has a plurality of pedestals that support the plurality of corner portions or the plurality of arc portions.

3. The optical component mounting structure according to claim 2.

4. The pressing plate has a rectangular outer shape, The number of the plurality of pedestals is four.

4. The optical component mounting structure according to claim 3.

5. The presser plate has two short sides and two long sides, Each of the two short side portions is provided with a through hole, The peripheral wall portion is provided with a columnar positioning portion that can be inserted into the through hole.

5. The optical component mounting structure according to claim 4.

6. The plurality of pedestals are positioned symmetrically with respect to a virtual line intersecting an optical axis of the optical component.

5. The optical component mounting structure according to claim 4.

7. The plurality of pedestals are positioned asymmetrically with respect to a virtual line intersecting an optical axis of the optical component.

4. The optical component mounting structure according to claim 3.

8. The pressing plate is magnetic, The application unit has a magnet that attracts the pressing plate by magnetic force.

2. The optical component mounting structure according to claim 1.

9. The optical component mounting structure according to any one of claims 1 to 8, a light receiving unit that receives light that has passed through the optical component; having optical equipment.

Images