JP6548385B2 - Lens holding mechanism - Google Patents

Description

  The present invention relates to an optical apparatus such as a camera (for example, a consumer camera such as a digital camera, a car-mounted camera, a surveillance camera, a medical camera mounted on an endoscope camera, etc., a camcorder (movie camera) Camera module and a lens holding mechanism (lens, lens holder (lens lens barrel and lens lens frame) included in the camera module and the camera module mounted on electronic devices such as a camera and a robot camera), a mobile phone, a tablet and a personal computer Lens holding mechanism).

  The lens holding mechanism of the conventional example includes the first lens provided closest to the object, the at least one lens at the rear (the image forming surface) of the first lens, and a cylindrical lens frame. . The lens frame holds and fixes the lens. The tip of this lens frame (the tip on the object side along the optical axis) has a caulking part, and after mounting the lens, the caulking part is bent inward by heat caulking to fix the lens. (Patent Documents 1 and 2).

  The most ball lens (the first lens body as the most ball) is a lens mainly for transmitting light and for setting the angle of view. The lens on the rear side of the first lens is the lens necessary to maintain the resolution of the photographed image and the moving image.

  In the lens frame described in Patent Document 1, a part of the bottom surface of the first ball lens (the second lens 9 in Patent Document 1) and a lens on the rear side of the first ball lens (in Patent Document 1) In 1, the part of the surface of the first lens 8) abuts. By this, by the caulking of the caulking portion, the lens on the rear side is also fixed in the frame through the lens of the first ball. Furthermore, the rear lens is further fixed in the frame by an adhesive.

  In the lens frame described in Patent Document 2, a lens is fixed in a frame by an adhesive and caulking. In addition, an air gap is provided between each lens.

JP, 2008-065261, A JP, 2010-060699, A

  However, the lens frame described in Patent Document 1 includes a part of the bottom surface of the first lens (second lens) and a lens (the first lens) on the rear side of the first lens in the frame. Only a part of the surface is in contact, and the ball lens is rotated by the impact from the outside, etc., and only the adhesive may be fixed, and the rotation strength of the ball is the largest. As a result, the adhesive may peel off and the lens on the rear side (the lens necessary to maintain the resolution of the photographed image and the moving image) may still rotate. The rotation of the rear lens may cause a change in resolution of a captured image or a moving image due to decentering of the optical axis or a change in a desired resolution of initialization setting.

  Further, in the lens frame described in Patent Document 2, since there is a gap between the respective lenses, it is considered that the rotation of the lens on the rear side due to the rotation of the most ball lens as in Patent Document 1 does not occur. However, even if there is no or the smallest rotation of the ball lens due to an external impact or the like, the rear lens may rotate more largely regardless of the degree of rotation of the ball lens, because there is a gap. . Similar to the lens frame described in Patent Document 1, the lens frame described in Patent Document 2 still changes the resolution of the captured image and moving image due to the eccentricity of the optical axis and sets initialization due to the rotation of the lens on the rear side. Changes in the desired resolution of.

  The present invention has been made to solve such problems. Specifically, in the lens holder, the rear lens is designed by arranging the first lens body as the first ball and the second lens body provided on the rear side (the image forming surface side) of the first ball. It is a main object of the present invention to provide a lens holding mechanism which prevents the rotation of the second lens body on the side and prevents the change in resolution of photographed images and moving images due to the decentering of the optical axis.

(1) A first lens body as the first ball including at least one lens, a second lens body including at least one lens, and a lens holder for receiving the first lens body and the second lens body A lens holding mechanism including
The first lens body includes a side surface, a surface portion provided on the object side along the optical axis, and a bottom portion provided on the imaging surface side along the optical axis,
The second lens body includes a side surface, a surface portion provided on the object side along the optical axis, and a bottom portion provided on the imaging surface side along the optical axis,
The first lens body and the second lens body are received in the lens holder so as to be aligned via a plate-like member,
The second lens body is fixed in a lens holder.
A lens holding mechanism characterized by

  (2) The lens holding mechanism according to (1), wherein a surface portion of the first lens body protrudes from the lens holder to an object side along an optical axis.

  (3) A camera module including the lens holding mechanism according to (1) or (2).

  (4) An optical apparatus including the camera module according to (3).

  (5) An electronic device comprising the camera module according to (3).

  By (1), it is possible to prevent the rotation of the second lens body, and to prevent the change of the resolution of the photographed image and the moving image due to the decentering of the optical axis and to suppress the change of the desired resolution.

    In the lens holding mechanism according to the present invention, preferably, according to (2), while the first lens body and the second lens body are housed and held in the lens holder, the angle of view is increased (a plane perpendicular to the optical axis As a standard, 180 degrees or more) is possible. In addition, when the lens holder is made of resin, it is also possible to reduce damage to the crimped portion due to resin change in the weather resistance test.

  In the lens holding mechanism according to the present invention, if these are possible, the shape of the surface portion projecting from the lens holder to the object side along the optical axis is the shape shown in FIG. 1 or the shape shown in FIG. Although not limited, the shape of the surface portion is described below by way of example with reference to FIG.

  As described in (3) to (5), for example, the lens holding mechanism of the present invention is installed in an optical device such as a camera (a consumer camera such as a digital camera, an in-vehicle camera, a surveillance camera, an endoscope camera Can be used as a camera module installed in medical cameras, camcorders (movie cameras) for shooting moving images, various inspection cameras, cameras for robots, etc., and electronic devices such as mobile phones, tablets, and personal computers. .

  In the present invention, the second lens is devised by devising how to arrange the first lens body as the first ball and the second lens body provided on the rear side (the image forming surface side) of the first ball in the lens holder. The rotation of the body is prevented, and "a change in resolution of a photographed image or a moving image due to eccentricity of an optical axis" or "a change in a desired resolution due to an eccentricity of an optical axis" is suppressed or prevented.

It is sectional drawing which shows the lens holding mechanism which concerns on embodiment (1st Example) of this invention, and has shown embodiment after heat welding. It is the elements on larger scale which show the modification of the shape before heat welding of the lens holding mechanism shown in FIG. It is the elements on larger scale which show the modification of the shape before heat welding of the lens holding mechanism shown in FIG. It is a figure which shows the diagonal ray in the lens holding mechanism shown in FIG. It is sectional drawing which shows the lens holding mechanism which concerns on embodiment (2nd Example) of this invention, and has shown embodiment after heat welding. It is a figure which shows the diagonal ray in the lens holding mechanism shown in FIG. It is sectional drawing which shows the lens holding mechanism which concerns on the modified example 1 of embodiment (1st Example) of this invention shown in FIG. It is sectional drawing which shows the lens holding mechanism which concerns on the modification 2 of embodiment (1st Example) of this invention shown in FIG. It is sectional drawing which shows the lens holding mechanism which concerns on the modification 3 of embodiment (1st Example) of this invention shown in FIG. It is a camera module equipped with the lens holding mechanism of the present embodiment. The optical axis (AX) is also clearly indicated. It is an optical apparatus including a camera module on which the lens holding mechanism of the present embodiment is mounted. The optical axis (AX) is also clearly indicated. The electronic device includes a camera module on which the lens holding mechanism of the present embodiment is mounted. The optical axis (AX) is also clearly indicated. It is a schematic diagram (perspective view) which shows the example of the plate-shaped member used by this invention. In addition, the optical axis (AX) at the time of being accommodated in a lens holding mechanism is also specified.

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

  Note that, with reference to FIG. 1, the imaging side (imaging side) means the side on which the imaging device 6 is provided along the optical axis (AX), and the object side (subject side) is the optical axis. It means the opposite side of the imaging side along.

  The lens holding mechanism according to the present invention includes the first lens body as the first ball including at least one lens, and the second lens body including at least one lens, but the desired physical properties (for example, refractive index) -If the Abbe number, partial dispersion ratio, linear expansion coefficient) and durability etc. are satisfied, the number of lenses of each lens body and the material of the lenses do not matter. Here, the first lens body is a lens body provided on the most object side in the lens holding mechanism, and is a lens body mainly for transmitting a light beam and for setting an angle of view. The second lens body is a lens body for maintaining the resolution of the photographed image and the moving image. The rotation of the second lens body may cause a change in resolution of a captured image or a moving image due to the eccentricity of the optical axis or a change in a desired resolution due to the eccentricity of the optical axis.

  In the following embodiments, a combination of a first lens body including one lens 21 as shown in FIG. 1 and a second lens body including four lenses (22, 23, 24, 25), A combination of a first lens body including one lens 210 as shown in FIG. 5 and a second lens body including three lenses (220, 230, 240) is described as an example.

  In the lens holding mechanism according to the present invention, the lens surface may be formed as a spherical surface or a flat surface or an aspherical surface. When the lens surface is spherical or flat, it is preferable because lens processing and assembly adjustment can be facilitated, and changes in optical performance due to processing and assembly adjustment errors can be prevented. When the lens surface is aspheric, the aspheric surface is an aspheric surface formed by grinding, a glass mold aspheric surface formed of glass by a mold, and a composite aspheric surface formed of resin on the surface of glass. It may be any spherical surface. The lens surface may be a diffractive surface, and the lens may be a gradient index lens (GRIN lens) or a plastic lens.

  The lens body used in the present invention includes a side surface, a surface portion provided on the object side along the optical axis, and a bottom portion provided on the imaging surface side along the optical axis.

  In the lens body and the lens included in the lens body, the surface means the surface provided on the object side along the optical axis, the bottom surface means the surface provided on the image forming side along the optical axis, and the side surface Refers to a surface other than the surface and the bottom, and the surface refers to a part provided with a surface provided on the object side along the optical axis, and optionally includes a partial region of the side surface on the object side along the optical axis There is also.

  This side surface is, for example, a surface including side surfaces (21 d, 22 d, 23 d, 24 d, 25 d) parallel to the optical axis and / or slopes (21 e) as shown in FIG.

  This surface corresponds to, for example, the spherical surface (21c) and the contact surfaces (22b, 23b, 24b, 25b) shown in FIG. This spherical surface intersects the optical axis.

  The bottom surface corresponds to, for example, the contact surfaces (21a, 22a, 23a, 24a, 25a, 35a) shown in FIG.

    In the lens holding mechanism according to the present invention, the surface portion of the first lens body provided on the object side along the optical axis refers to a region projecting from the lens holder to the object side along the optical axis.

  This surface portion (surface portion of the first lens body) includes a partial region of the side surface on the object side along the optical axis and a surface provided on the object side along the optical axis.

  This “partial area of the side surface on the object side along the optical axis” satisfies the optical performance (such as not blocking the effective line) of the lens holding mechanism and the camera module on which the lens holding mechanism is mounted. This is set by adjusting the distance as shown by d in FIG. 6, that is, the distance (minimum distance) between the tip (300c) and the light ray passing the outermost side when viewed from the optical axis AX. This interval (d) may be provided to such an extent that the light beam 5 follows an effective line by visual observation by a person, and is preferably more than 0 mm.

For example, the following region corresponds to this surface portion.
An area (40) protruding from the lens holder 3 along the optical axis to the object side as shown in FIG. 1 and including a spherical surface (21c) and a partial area of the slope (21e).
An area (40) protruding from the lens holder (300) along the optical axis toward the object side as shown in FIG. 5 and including a spherical surface and a partial area of a side surface parallel to the optical axis.

  In the lens holding mechanism according to the present invention, the shape of the surface portion (surface portion of the first lens body) protruding from the lens holder to the object side along the optical axis is the shape or the figure shown in FIG. Although it is not limited to the shape etc. which are shown to 6, the shape of this surface part is illustrated and illustrated with FIG. 1 etc. below.

  In the lens holding mechanism according to the present invention, various processes can be performed on the surface of the lens body as necessary. As an example of this processing, hydrophilization of the surface portion with a photocatalyst or the like may be mentioned in order to prevent fogging of the lens body and formation of water droplets. For example, for a portion which may be exposed to the outside when used in a camera module, an optical device, an electronic device or the like, such as the surface portion 40 shown in FIG. 1 or the surface 21c shown in FIG. In order to prevent the fogging of the lens body and the formation of water droplets, processing such as hydrophilization with a photocatalyst or the like can be mentioned.

  In the lens holding mechanism according to the present invention, the bottom portion provided on the image forming surface side along the optical axis is provided on the image forming side along the optical axis and a partial region of the side surface on the image forming side. And a bottom surface.

For example, the following area corresponds to the bottom portion.
A region including the contact surface (25a, 35a) and a partial region of the side surface (25d) parallel to the optical axis as shown in FIG.
A region including a bottom surface (240a) and a partial region of a side surface (240d) parallel to the optical axis as shown in FIG.

  The lens holding mechanism according to the present invention includes the lens holder, and examples of the constituent material of the lens holder include resin material and aluminum die casting. For example, when the lens body is fixed to the lens holder by a method of heat staking, a resin material suitable for heat staking is preferable as a constituent material of the lens holder, for example, polycarbonate (PC: Poly Carbonate), polymethacrylic acid Various resin materials such as methyl (PMMA), polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene (ABS), polyamide resin (PA) and the like can be mentioned.

  The lens holder used in the present invention may receive the lens body (the first lens body and the second lens body) so that the above-mentioned second lens body is prevented from rotating by an external impact or the like, preferably the first lens You should accept so that your body is not rotated. In addition. Examples of the shape of the lens holder include the shape of a cylindrical body, the shape of a polygonal cylindrical body, the shape of a closed-end cylindrical body, and the shape of a closed-end polygonal cylindrical body.

In order to more reliably prevent this rotation, the lens holding mechanism according to the present invention uses, for example, the following configuration.
A configuration in which the first lens body and the second lens body can be received in the lens holder so as to be aligned via the plate-like member 800 as shown in FIG. 1 and the like.
The plate-like member is a member that absorbs the rotational force generated by the rotation of the first lens body due to an external impact or the like. The shape of the plate-like member may be any configuration that does not inhibit the function of the lens of the lens body (such as passing the light beam 5) as shown in FIGS. 4 and 6, for example, as shown in FIG. A shape like a caliber plate 800 having a desired opening 801 (shape like a perforated plate) may be mentioned. Due to the presence of the opening 801, as shown in FIGS. 4 and 6, the light beam 5 passes in the lens holding mechanism. The shape of the opening of the plate-like member may, for example, be a polygon or a circle having a desired diameter as shown in FIG. The shape of the plate-like member may also be, for example, a polygon or a circle having a desired diameter having an opening as shown in FIG. The plate-like members may be integrally provided as shown in FIG. 13 or may be combined together as shown in FIG. 13 when they are combined by separate members and accommodated in the lens holding mechanism. Good.

  Further, from the viewpoint of absorbing the rotational force, the plate-like member may be, for example, a metal member (a plate spring or the like).

  In addition, it is also possible to set the thickness in the optical axis direction in consideration of adjusting the cumulative tolerance of the lens body in the optical axis direction (the thickness of the lens body in the optical axis direction) of this plate-like member. .

In addition, in the lens holding mechanism according to the present invention, it is also possible to adopt the following configuration, if necessary.
-The first lens body and the second lens body are received in the lens holder such that the bottom surface portion of the first lens body abuts on the surface portion of the second lens body, and the second lens body is The structure fixed in the lens holder so as to be fitted to one lens body and / or the lens holder The shape of the above-mentioned "fitting" is, for example, "providing a projection on the surface portion of the second lens body, “A configuration in which a hole for receiving this protrusion is provided in one lens body or lens holder” or “A protrusion is provided in the bottom of the first lens body or the lens holder, and the protrusion is received on the surface of the second lens body "A structure provided with a part" is mentioned.

  When the tip of the lens holder on the object side along the optical axis as shown in FIG. 1 etc. abuts on a part of the side surface of the first lens body and / or a part of the surface of the first lens body It is carried out by heat staking, adhesion with an adhesive, or insertion of a known pressing ring or C ring. For example, in the case of using an adhesive, it is preferable to use an elastic adhesive as the adhesive when the linear expansion coefficients and the like of the first lens body and the lens holder are largely different. Can be absorbed by the adhesive and deformation of the first lens body can be prevented.

  Also, when there is no large difference between the linear expansion coefficient of the material forming the lens holder and the linear expansion coefficient of the material forming the first lens body, or the lens holder is more elastic than the first lens body, etc. Preferably, the first lens body is fixed by caulking the portion 31c of the lens holder.

Note that this contact (the tip of the lens holder on the object side along the optical axis contacts a part of the side surface of the first lens body and / or a part of the surface of the first lens body) is variously There is a form. For example, the following examples may be mentioned.
The contact in which the tip end portion (31c) of the lens holder as shown in FIG. 7 is in close contact with part of the spherical surface (21c) of the lens body and the inclined surface (21e) of the lens body.
-The contact which the tip part (31c) of a lens holder as shown in FIG. 8 closely contacts with the slope (21e) of a lens body.
As shown in FIG. 9, a predetermined air gap (a gap between the tip end of the lens holder (thermally welded portion 31c) and the inclined surface (21e) of the lens body to the extent that the desired rotation prevention of the lens body is achieved) Abutment with 600) By this “contacting closely” configuration, the lens body is held and fixed to the lens holder both in the optical axis direction and in the direction perpendicular to the optical axis direction. Since the lens body is not easily rotated or the like against external impact or the like, the prevention of the decentering of the optical axis and the prevention of the deviation of the lens interval are further achieved.

  Further, the contact as shown in FIG. 5 (the rear end of the lens holder on the image forming side along the optical axis abuts on the bottom of the lens body) is caused, for example, by heat staking, adhesion by an adhesive or , And by inserting a known retaining ring or C ring. For example, in the case of using an adhesive, it is preferable to use an elastic adhesive as the adhesive when the linear expansion coefficients etc. of the lens body and the lens holder are largely different. It can be absorbed by the agent and deformation of the lens body can be prevented.

  Also, for example, when there is no large difference between the linear expansion coefficient of the material forming the lens holder and the linear expansion coefficient of the material forming the lens body, or when the lens holder is more elastic than the lens body, etc. As shown in FIG. 5, it is preferable to fix the lens body by caulking the bottom of the lens holder.

  In the lens holding mechanism according to the present invention, other than the lens body and the lens holder, as required, for example, a member for preventing ghosting of an image or the like taken by a camera module, cumulative tolerance of the lens body in the optical axis direction A member for adjusting (the thickness of the lens body in the optical axis direction), a waterproof member for waterproofing, and an IR cut filter may be provided.

Hereinafter, embodiments of the present invention will be specifically described using examples with reference to the drawings. FIG. 1 is a cross-sectional view of a lens holding mechanism 1 according to an embodiment (Example 1) of the present invention. FIG. 2 is a partially enlarged view showing the shape of the heat welding portion in the lens holding mechanism in FIG. 1 before welding.
In the following embodiment, the aperture plate 800 uses, as an example, a thin metal plate material having a shape as shown in FIG.

  As shown in FIG. 1, the lens body (combination of the first lens body and the second lens body) used in the present embodiment includes a lens 21 functioning as a first lens body, and a second lens body (lens 22, A combination including the lens 23, the lens 24, and the lens 25 is configured to be superimposed via the aperture plate 800.

  The lenses 21 to 24 have contact surfaces 21 a to 25 a and 22 b to 25 b and 35 a that contact the adjacent lenses and the aperture plate 800.

  The surface of the lens 21 has at least a spherical surface 21c which is a front end of the lens, a side surface 21d parallel to the optical axis AX, and an inclined surface 21e formed by chamfering. In addition, a waterproof member attaching portion 21f for waterproofing is provided.

  The lens holder 3 has inner diameter portions 31b to 35b for aligning the optical axes of the lenses 21 to 25 and further includes a thermal welding portion 31c for fixing and holding the lens 21 by thermal welding. The heat welding portion 31c in FIG. 1 shows the shape after heat welding, but before heat welding, as shown in FIG. 2, the heat welding portion 31c has the same diameter as the inner diameter portion 31b.

  Note that the shape after heat welding is such that the tip of the lens holder (heat welded portion 31c) as shown in FIG. 1 is in contact with the inclined surface (21e) of the lens body, as shown in FIG. The shape before welding may be shaped as shown in FIG. FIG. 3 shows a structure different from FIG. 2 in that a predetermined air gap 600 is provided between the front end portion (thermally welded portion 31c, inner diameter portion 31b) of the lens holder and the side surface 21d parallel to the optical axis. With this structure, it is possible to more reliably bend the heat-welded portion 31c from the fulcrum portion 700 and the heat-welded portion 31c inwardly from the fulcrum portion 700 (lens body side), so that the tip portion (heat-welded portion) It becomes more possible for 31c) to be in intimate contact with the inclined surface (21e) of the lens body.

  The waterproof member 4 is attached to the waterproof member attaching portion 21 f of the lens 21.

  Next, the assembly procedure will be described.

  In the lens holder 3, when the lenses 21 to 25 are fitted into the lens holder 3, the contact surfaces 21 a to 25 a and 22 b to 25 b are positioned in advance so that the optical axes of the lenses 21 to 25 coincide as much as possible. ing. Further, the positions of the lenses 21 to 25 in the optical axis direction can be positioned by bringing the adjacent lenses and the aperture plate 800 into contact with each other.

  First, the lens 25 is inserted into the lens holder 3. At this time, the lens contact surfaces 25a and 35a contact the lens holder 3 to determine the position of the lens 25 in the optical axis direction. At the same time, the optical axis of the lens 25 corresponds to the inner diameter portion 35b of the lens holder 3 and the lens 25. The optical axis AX is positioned by the engagement of the side face 25d of the lens.

  Next, the lens 24 is inserted into the lens holder 3 in the same manner as the lens 25, and the aperture plate 7 is held between the contact surface 25b of the lens 25 so that the contact surface 24a of the lens 24 abuts. At this time, the optical axis of the lens 24 is positioned on the optical axis AX by the fitting of the inner diameter portion 34 b of the lens holder 3 and the side surface 25 d of the lens 25.

  In the same manner, insert the lenses 23 and 22 so that the contact surface 23a of the lens 23 contacts the contact surface 24b of the lens 24 and the contact surface 22a of the lens 22 contacts the contact surface 23b of the lens 23 Position in the direction of the optical axis. The optical axes of the lenses 23 and 22 are determined by the side surfaces 23 d and 22 d of the lenses and the inner diameter portions 33 b and 32 b of the lens holder 3 to coincide with the optical axis AX.

  Finally, the waterproof member 4, the aperture plate 800 and the lens 21 are inserted into the lens holder 3, and the contact portion 21 a of the lens 21 and the contact portion 22 b of the lens 22 are brought into contact with the aperture plate 800. At this time, the optical axis of the lens 21 is determined so that the inner diameter portion 31 b of the lens holder 3 and the side surface 21 d of the lens 21 fit and coincide with the optical axis AX.

  As shown in FIG. 2, the inner diameter of the thermally welded portion 31 c before the lens holder 3 is welded is the same as the inner diameter portion 31 b.

  The heat welding portion 31c is welded from the outside of the lens holder 3 by a heat welding machine (not shown) so that the slope 21e of the lens 21 and the heat welding portion 31c are in close contact. At this time, the welded portion 31c is formed only on the slope 21e and is formed so as not to protrude from the spherical surface 21c.

  As shown in FIG. 1, the lens 21 is fixedly held on the lens holder 3 together with the lenses of the other lenses 22 to 25 by the heat welding.

  Then, as shown in FIG. 1, the surface portion 40 projects from the lens holder along the optical axis toward the object side.

  FIG. 4 is a view schematically representing the light beam 5 incident on the lens from various angles, but the thermally welded portion 31c does not block the light beam incident on the lens spherical surface 21c, that is, the pupil diameter of the lens 21. It is possible to provide an image without any deterioration in image quality, such as darkening or shadowing of the peripheral portion of the image.

The heat-welded portion 31c has less change in resin due to sunlight than when covering the lens spherical surface 21c, and therefore there is less risk of breakage due to impact or the like.
In addition, a lens 21 functioning as a first lens body, and a second lens body (lens 2
2. Since the combination including the lens 23, the lens 24, and the lens 25 is overlapped through the aperture plate 800, the second lens body does not rotate even when the first lens is rotated by an external impact or the like. It is configured as follows. This is because the aperture plate 800 absorbs the rotational force generated by the rotation of the first lens body due to an external impact or the like, and prevents the second lens body from rotating.

  FIG. 5 is a partial region of a cross-sectional view of the lens holding mechanism 1 according to the embodiment (Example 2) of the present invention.

  As shown in FIG. 5, the lens body (combination of the first lens body and the second lens body) used in the present embodiment (Example 2) is a lens 210 functioning as a first lens body, a second lens body (A combination including the lens 220, the lens 230, and the lens 240) is configured to be superimposed via the aperture plate 800.

  The lens body is accommodated in the lens holder 300, but the lens 210 is accommodated as the most ball on the object side, and the lens 240 is provided most on the imaging side.

  The lens 210 is provided with a region 40 projecting from the lens holder 300 along the optical axis toward the object side. This region 40 is an example of the surface portion of the present invention. This area 40 includes the spherical surface 210 c of the lens 210 and the side surface 210 d parallel to the optical axis AX in the lens 210.

    In addition, on the image forming side of the lens 240, a bottom portion is provided. The bottom surface portion 50 is a partial region of the bottom surface 240 a and the side surface 240 d on the image forming side.

A waterproof member 400 is also attached in the lens holder 300 as needed. In addition, an IR cut filter 500 is also provided in the lens body as needed. Furthermore, an imaging device (not shown) is also provided on the image forming side of the lens holding mechanism.
The lenses (210, 220, 230, 240) are attached to the lens holder 300 so that the optical axes (AX) of the lenses (210, 220, 230, 240) coincide with each other by fitting them into the lens holder 300. It is attached. The positions of the lenses (210, 220, 230, 240) in the direction of the optical axis can be positioned by bringing adjacent lenses or the aperture plate 800 into contact with each other.

  After the attachment, the bottom of the lens 240 and the heat-welded portion 310 c provided at the rear end of the lens holder 300 are welded in close contact with each other by a heat-welding machine (not shown) from the outside of the lens holder 300. By this welding, as shown in FIG. 5, the lens body is fixed and held by the lens holder 300.

  As in the first embodiment, since the lens 210 functioning as the first lens body and the second lens body (combination including the lens 220, the lens 230, and the lens 240) are overlapped via the aperture plate 800, Even when the first lens is rotated by an external impact or the like, the second lens body is configured not to rotate. This is because the aperture plate 800 absorbs the rotational force generated by the rotation of the first lens body due to an external impact or the like, and prevents the second lens body from rotating.

  Further, as shown in FIG. 5, the surface portion 40 protrudes from the lens holder 300 to the object side along the optical axis.

  FIG. 6 is a view schematically representing the light beam 5 incident on the lens from various angles, but the region 40 projecting to the above object side (a human visual observation as to whether the light beam 5 follows an effective line The tip portion (300c) provided on the object side of the lens holder intercepts the light beam incident on the lens spherical surface 210c by the interval shown in d in FIG. In other words, since the lens 210 is formed without blocking the pupil diameter of the lens 210, it is possible to provide an image without image quality deterioration, such as darkening or shadowing of the periphery of the image. The distance indicated by d in FIG. 6 is the distance between the tip (300c) and the light beam passing the outermost side when viewed from the optical axis AX.

  With the above configuration (projecting configuration), the tip portion 300c has less change in resin due to sunlight, and accordingly, there is little risk of breakage due to impact or the like.

  FIG. 10 shows an embodiment in which a lens holding mechanism in which the image pickup device 6 is incorporated in the lens holding mechanism shown in FIG. 1, FIG. 5, FIG. 7, FIG. Further, FIG. 11 shows an optical apparatus 200a (such as an on-vehicle camera or a monitoring camera) incorporating the camera module 100 as shown in FIG. FIG. 12 shows an electronic device 200b (such as a mobile phone) incorporating the camera module 100 as shown in FIG. According to the present invention, an optical apparatus such as a digital camera or the like that is resistant to impact and an electronic apparatus without deterioration in image quality is provided.

  Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration of the lens holding mechanism used in the present invention is not limited to this, and does not deviate from the scope of the present invention In the scope, even if there is a design change, it is included in the present invention.

1: Lens holding mechanism 2: Lens 21-25, 210, 220, 230, 240: Lens 21a-25a, 22b-25b: Contact surface 21c: Sphere 21d-25d: Side 21e parallel to the optical axis: Slope 21f: Waterproof member mounting portion 3: lens holder 31a: contact portions 31b to 35b: inner diameter portions 31c and 310c: heat welding portion 40: surface portion (surface portion of lens body)
50: Bottom (bottom of lens)
4: waterproof member 5: diagonal beam 6: imaging device 7: aperture plate 100: camera module 200: electronic device AX: optical axis 800: aperture plate

Claims (4)

A lens holding apparatus comprising: a first lens body as a first ball including at least one lens; a second lens body including at least one lens; and a lens holder for receiving the first lens body and the second lens body The mechanism,
The first lens body includes a side surface, a surface portion provided on the object side along the optical axis, and a bottom portion provided on the imaging surface side along the optical axis,
The second lens body includes a side surface, a surface portion provided on the object side along the optical axis, and a bottom portion provided on the imaging surface side along the optical axis,
The first lens body and the second lens body are received in a lens holder via a plate-like member so as to be aligned along the optical axis,
The second lens body is fixed in a lens holder,
A waterproof member is disposed between the plate-like member and the lens holder,
The center of the waterproof member is located on the extension of the plate-like member in the direction perpendicular to the optical axis,
When the first lens body is rotated to rotate the first lens body in the contact surface between the plate-like member to the front Symbol lens holder, the second lens element does not rotate with respect to the lens holder ,
A lens holding mechanism characterized by The surface portion of the first lens body protrudes from the lens holder along the optical axis toward the object side.
The lens holding mechanism according to claim 1, A camera module comprising the lens holding mechanism according to claim 1 or 2 . An electronic device comprising the camera module according to claim 3 .