JP2006352343A - Digital camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital camera capable of easily executing positioning of an imaging lens in an optical axis direction and a lens circumferential direction and alignment of a lens center. <P>SOLUTION: The camera comprises: a camera main body having a front side case 1a; an imaging lens unit 13; and a chassis 10. The front side case 1a is provided with a movable lens barrel projection part 2. The chassis 10 is positioned and arranged in the camera main body. The imaging lens unit 13 includes an imaging lens 14 comprising a fixed lens barrel part 15 and a movable lens barrel 16, wherein imaging system components such as a zooming motor 18 are provided inside and outside the fixed lens barrel part 15. The outer circumferential part of the fixed lens barrel part 15 of the imaging lens unit 13 is provided with a claw part 19, the front side of the chassis 10 is provided with a claw latch piece 22, and the claw part 19 and the claw latch piece 22 are mutually latched to temporarily fix the imaging lens unit 13 to the front side of the chassis 10 and to determine the positions in the lens optical axis direction and the lens circumferential direction, and a fitting part of the fixed lens barrel part is formed to the inner face of the front side case 1a so as to determine the lens center position of the imaging lens unit 13 by fitting the front end of the fixed lens barrel part 15 of the imaging lens unit 13 along the circumferential edge of the movable lens barrel projection part 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a digital camera.

The digital camera includes a front case and a rear case, and an imaging lens in which, for example, an imaging lens described in Patent Document 1 and an imaging system component such as a solid-state imaging device are combined in a predetermined positional relationship with the front case. The unit is arranged.
JP-A-9-43474

  The digital camera is assembled by positioning the imaging lens unit in the camera body in the optical axis direction and the lens circumferential direction of the imaging lens and fixing the lens center by positioning.

  However, in the conventional digital camera, the positioning of the imaging lens in the optical axis direction and the lens circumferential direction and the positioning of the lens center are troublesome.

  An object of the present invention is to provide a digital camera capable of easily positioning an imaging lens in an optical axis direction and a lens circumferential direction and positioning a lens center.

  The digital camera of the present invention comprises a camera body comprising a front case and a rear case, and the front case provided with a movable lens barrel protruding portion for projecting a movable lens barrel of an imaging lens forward, and the camera An imaging lens comprising a chassis positioned and disposed within the main body, a fixed lens barrel, and a movable lens barrel protruding and retractable in the fixed lens barrel, and the interior of the fixed lens barrel And an imaging lens unit provided with an imaging system part outside, and the imaging lens unit by engaging each other at a plurality of positions on the outer periphery of the fixed barrel portion of the imaging lens unit and the front surface of the chassis. Are provided with a plurality of claw portions and a claw latching portion that preliminarily fix the positions of the lens in the optical axis direction and the lens circumferential direction to the front surface of the chassis, and the movable mirror is provided on the inner surface of the front case. A fixed barrel portion fitting portion that defines the lens center position of the imaging lens unit by fitting the front end portion of the fixed barrel portion of the imaging lens unit along the periphery of the protruding portion is formed. Features.

  In the digital camera of the present invention, the plurality of claw portions project from the outer periphery of the fixed lens barrel portion of the imaging lens unit, and the plurality of claw latching portions are provided on the chassis at the outer periphery of the fixed lens barrel portion. It is desirable to be constituted by a claw latching piece that is provided to face each other and has elasticity that deforms in a direction in which it is in contact with and away from the outer peripheral surface of the fixed lens barrel, and in which a latching hole for the claw is formed. .

  Further, the claw-holding piece is supported by the chassis via an elastic body that deforms in the front-rear direction of the chassis, and the front end of the fixed lens barrel portion in which the claw-part is hooked on the claw-holding piece. It is preferable that the elastic body be pressed against the fixed barrel portion fitting portion on the inner surface of the front case.

  Further, it is desirable that the claw retaining piece is cut and raised from the chassis to the front side thereof.

  In that case, the claw retaining piece is connected to the chassis at one end, and the other end and both sides of the tongue piece separated from the chassis are cut and raised at the front side of the chassis. Then, a plate spring having elasticity that is bent and deformed in the front-rear direction of the chassis is formed by a portion on the one end side of the tongue piece, and the claw portion is hooked on the claw holding piece by the elasticity of the plate spring. It is preferable that the front end of the fixed barrel portion thus pressed is pressed against the fixed barrel portion fitting portion on the inner surface of the front case.

  Furthermore, in the digital camera of the present invention, the movable lens barrel protruding portion of the front case is formed by fitting a decorative ring in an opening provided in the front portion of the front case. It is preferable to form the fixed lens barrel fitting portion on the surface facing the camera body.

  In the digital camera of the present invention, the imaging lens unit is placed in the optical axis direction of the imaging lens and a plurality of positions on the outer periphery of the fixed barrel portion of the imaging lens unit and the front surface of the chassis by mutual engagement. A movable lens barrel provided on the front case on the inner surface of the front case of the camera body is provided with a plurality of claw portions and a claw latch portion that prescribe and fix the lens circumferential position to the front surface of the chassis. Along the peripheral edge of the protruding portion, a fixed barrel portion fitting portion that defines the lens center position of the imaging lens unit by fitting the front end portion of the fixed barrel portion of the imaging lens unit is formed. By engaging the claw portion and the claw retaining portion, the imaging lens unit can be easily positioned in the optical axis direction and the lens circumferential direction, and the fixed lens barrel portion of the imaging lens unit By fitting the front end to the fixed lens barrel fitting portion, the positioning of the lens center of the image pickup lens can be easily performed.

  In the digital camera of the present invention, the plurality of claw portions project from the outer periphery of the fixed lens barrel portion of the imaging lens unit, and the plurality of claw latching portions are provided on the chassis at the outer periphery of the fixed lens barrel portion. Desirably, it is formed of a claw-holding piece that is provided to be opposed to each other and has elasticity that deforms in a direction to come in contact with and away from the outer peripheral surface of the fixed barrel portion, and in which a hooking hole of the claw portion is formed. In this way, the plurality of claw portions can be easily hooked on the plurality of claw hook portions.

  Further, the claw-holding piece is supported by the chassis via an elastic body that deforms in the front-rear direction of the chassis, and the front end of the fixed lens barrel portion in which the claw-part is hooked on the claw-holding piece. It is preferable that the elastic body be pressed against the fixed barrel portion fitting portion on the inner surface of the front case, thereby increasing the positioning accuracy of the imaging lens in the optical axis direction. be able to.

  Further, it is desirable that the claw retaining piece is cut and raised from the chassis to the front side thereof, so that the claw retaining piece can be accurately placed at a predetermined position on the chassis at low cost. Can be provided.

  In that case, the claw retaining piece is connected to the chassis at one end, and the other end and both sides of the tongue piece separated from the chassis are cut and raised at the front side of the chassis. Then, a plate spring having elasticity that is bent and deformed in the front-rear direction of the chassis is formed by a portion on the one end side of the tongue piece, and the claw portion is hooked on the claw holding piece by the elasticity of the plate spring. It is preferable that the front end of the fixed lens barrel portion pressed is pressed against the fixed lens barrel fitting portion on the inner surface of the front case, so that the positioning accuracy of the imaging lens in the optical axis direction is improved. Can be high.

  Furthermore, in the digital camera of the present invention, the movable lens barrel protruding portion of the front case is formed by fitting a decorative ring in an opening provided in the front portion of the front case. It is preferable that the fixed barrel portion fitting portion is formed on a surface facing the inside of the camera body, and by doing so, the positional relationship between the movable barrel protruding portion and the fixed barrel portion fitting portion is determined. It is possible to increase the positioning accuracy of the center of the imaging lens.

  1 to 5 show an embodiment of the present invention, FIG. 1 is a perspective view of a digital camera, FIG. 2 is an exploded perspective view of the digital camera, FIG. 3 is an enlarged sectional view of the digital camera, and FIG. FIG. 5 is an enlarged view of a portion IV in FIG. 3, and FIG. 5 is a perspective view of a claw retaining piece portion in FIG.

  This digital camera is a thin camera having a length in the left-right direction of 80 to 90 mm, a height of 50 to 60 mm, and a thickness between the front and rear surfaces of 15 to 25 mm, and the left and right end portions are each formed on a semi-cylindrical surface. The camera body 1 formed of a rectangular case, the chassis 10 positioned and positioned in the camera body 1, and the positions of the lens optical axis direction and the lens circumferential direction are provisionally fixed to the front surface of the chassis 10. And an imaging lens unit 13 having a lens center position defined and disposed in the camera body 1.

  The camera body 1 is composed of a front case 1a and a rear case 1b. The peripheral portions of the front case 1a and the rear case 1b are fitted to each other, and these cases 1a and 1b are arranged at a plurality of positions on the peripheral portion. And assembled with screws.

  Then, on the front portion of the front case 1a, at one end thereof, the movable lens barrel 16 of the imaging lens unit 13 projects forward of the camera body 1 as indicated by a virtual line (two-dot chain line) in FIG. A movable lens barrel protruding portion 2 is provided, and a strobe light portion 5 is provided at an upper position on the other end side of the front surface portion of the front case 1a. A shutter button 6 and a power source are provided on the upper surface portion. A switch 7 is provided.

  On the other hand, a monitor display portion 8 having a liquid crystal display panel 9 is provided on one end side of the rear surface portion of the rear case 1b, and on the other end side of the rear surface portion of the rear case 1b. Menu keys, zoom buttons, etc. (not shown) are provided.

  The chassis 10 has a bent portion 10a having a width corresponding to the distance between the inner surfaces of the lower end portions of the front case 1a and the rear case 1b at the lower end portion, and the bent portion 10a includes the bent portion 10a. It is made of a metal plate provided with a plurality of screw holes 12 corresponding to the plurality of screw insertion holes 11 provided in the lower surface portion of the rear case 1b, and avoids the arrangement portion of the imaging lens unit 13 in the chassis 10. A circuit board (not shown) and various electronic components are mounted.

  The chassis 10 is positioned and arranged at a predetermined position in the camera body 1, and the bent portion 10a is sandwiched between lower ends of the front and rear cases 1a and 1b of the camera body 1 and The bent portion 10a is screwed to the lower surface portion of the rear case 1b and fixed in the camera body 1.

  The imaging lens unit 13 includes an imaging lens 14 including a fixed barrel portion 15 and a movable barrel 16 that protrudes into and can be stored in the fixed barrel portion 15, and the fixed barrel portion 15 is provided with imaging system parts such as an individual imaging device 17 and a zooming motor 18 inside and outside, and the individual imaging device 17 is provided at the rear end of the fixed lens barrel 15 at the imaging lens 14. The zooming motor 18 is disposed on the outer peripheral surface of the fixed barrel portion 15.

  The imaging lens 14 is a zooming lens, and the movable lens barrel 16 protrudes into the fixed lens barrel portion 15 and is provided in a retractable manner in a first lens barrel 16a and the first lens barrel 16a. The second lens barrel 16b is provided so as to protrude and retract. Lens elements are disposed in the fixed lens barrel 15 and in the first and second 16a and 16b of the movable lens barrel 16, respectively. ing.

  In this digital camera, the imaging lens is secured to a plurality of locations (preferably 3 to 4 locations) on the outer periphery of the fixed barrel portion 15 of the imaging lens unit 13 and the front surface of the chassis 10 by mutual engagement. A plurality of claw portions 19 and a claw hooking portion 22 for temporarily fixing the unit 13 to the front surface of the chassis 10 by defining the positions of the lens optical axis direction and the lens circumferential direction are provided, and the inner surface of the front case 1a is provided. A fixed lens barrel fitting that defines the lens center position of the imaging lens unit 13 by inserting the front end of the stationary lens barrel 15 of the imaging lens unit 13 along the periphery of the movable lens barrel protruding portion 2. A joint portion 25 is formed.

  The plurality of claw portions 19 are formed such that the end surface in the front end direction of the fixed lens barrel portion 15 is a surface substantially perpendicular to the peripheral surface of the fixed lens barrel portion 15, and the outer surface is the fixed lens barrel portion. 15 is formed in a wedge shape formed on an inclined surface close to the peripheral surface of the fixed barrel portion 15 toward the rear end direction, and integrally projects on the outer periphery of the fixed barrel portion 15 of the imaging lens unit 13. Has been.

  The plurality of claw latching portions 22 are provided on the chassis 10 so as to face the outer periphery of the fixed barrel portion 15 and have elasticity that deforms in a direction in which the fixed barrel portion 15 contacts and separates from the fixed barrel portion 15. The claw portion 19 is formed by a claw retaining piece in which a retaining hole 23 of the claw portion 19 is formed. Hereinafter, the nail latching portion 22 is referred to as a nail latching piece.

  The claw retaining piece 22 is cut and raised from the chassis 10 to the front side thereof. In this embodiment, the claw retaining piece 22 is at one end of the chassis 10 as shown in FIG. The other end and both sides of the tongue piece 21 separated from the chassis 10 by the slits 20 provided in the chassis 10 are formed by cutting up the front side of the chassis 10; The fixed lens barrel portion 15 has elasticity that is bent and deformed in the front-rear direction of the chassis 10 by the portion of the one end side of the tongue piece 21, and the claw portion 19 is hooked on the claw retaining piece 22. A plate spring 24 is formed to press the front end against the fixed barrel portion fitting portion 25 formed on the inner surface of the front case 1a.

  The fixed barrel portion fitting portion 25 receives a cylindrical surface 25a that fits closely to the outer peripheral surface of the front end portion of the fixed barrel portion 15 and the front end surface of the fixed barrel portion 15. It consists of an annular surface 25b.

  In this embodiment, the movable lens barrel protruding portion 2 of the front case 1a is formed by fitting a circular decorative ring 4 into the opening 3 provided in the front portion of the front case 1a. The fixed barrel portion fitting portion 25 is formed along the inner peripheral edge of the surface facing the camera body 1.

  In this digital camera, the imaging lens unit 13 is latched by a plurality of claw retaining pieces 22 provided on the chassis 10 with a plurality of claw portions 19 projecting from the outer periphery of the fixed barrel portion 15. The position of the imaging lens 14 in the optical axis direction and the lens circumferential direction is defined and temporarily fixed to the front surface of the chassis 10, and the chassis 10 is placed at a predetermined position with respect to the front case 1a. The imaging lens is inserted by fitting the front end portion of the fixed barrel portion 15 of the unit 13 into the fixed barrel portion fitting portion 25 formed along the periphery of the movable barrel protruding portion 2 provided in the front case 1a. It is manufactured by assembling the camera body 1 by positioning the lens center position of the unit 13 and fitting the peripheral portions of the front case 1a and the rear case 1b to each other and screwing them together. That.

  In this digital camera, the imaging lens unit 13 is connected to a plurality of positions on the outer periphery of the fixed barrel portion 15 of the imaging lens unit 13 and the front surface of the chassis 10, so that the imaging lens unit 13 is connected to the optical axis of the imaging lens 14. The front case 1a of the camera body 1 is provided on the inner surface of the front case 1a. A fixed mirror that defines the lens center position of the imaging lens unit 13 by fitting the front end portion of the stationary lens barrel portion 15 of the imaging lens unit 13 along the periphery of the movable lens barrel protruding portion 2 provided in 1a. Since the tube fitting portion 25 is formed, the image pickup lens 14 can be easily positioned in the optical axis direction and the lens circumferential direction by engaging the claw portion 19 and the claw engagement piece 22. The lens center of the imaging lens 14 can be obtained by fitting the front end portion of the fixed barrel portion 15 of the imaging lens unit 13 into the fixed barrel portion fitting portion 25 on the inner surface of the front case 1a. Can be easily positioned.

  Further, in the digital camera of this embodiment, the plurality of claw portions 19 protrude from the outer periphery of the fixed lens barrel portion 15 of the imaging lens unit 13 and the plurality of claw latch portions that latch the claw portion 19 are provided. Is provided on the chassis 10 so as to oppose the outer periphery of the fixed barrel portion 15 and has a resiliency that deforms in a direction in which the fixed barrel portion 15 contacts and separates from the fixed barrel portion 15. 23, the claw-holding pieces 22 are formed, so that the plurality of claw portions 19 can be connected to the plurality of claw-holding portions (only by pressing the imaging lens unit 13 against the chassis 10 from the front side thereof. It can be easily hooked on the nail hooking piece) 22.

  Further, in this embodiment, the claw retaining piece 22 is formed by cutting and raising from the chassis 10 to the front side thereof, so that the claw retaining piece 22 can be accurately placed at a predetermined position on the chassis 10 and low. Can be provided at cost.

  In this embodiment, the claw-holding piece 22 is connected to the chassis 10 at one end, and the other end side portion of the tongue piece 21 separated from the chassis 10 at the other end and the both sides is connected to the chassis 10. A plate spring 24 having elasticity that is bent and deformed in the front-rear direction of the chassis 10 is formed by a portion on the one end side of the tongue piece 21, and the elasticity of the plate spring 24 The front end of the fixed barrel portion 15 with the claw portion 19 hooked on the claw latch piece 22 is pressed against the fixed barrel portion fitting portion 25 on the inner surface of the front case 1a. The positioning accuracy of the imaging lens 14 in the optical axis direction can be increased.

  Furthermore, in this embodiment, the movable lens barrel protruding portion 2 of the front case 1a is formed by fitting the decorative ring 4 in the opening 3 provided in the front surface portion of the front case 1a. Since the fixed barrel portion fitting portion 25 is formed on the surface facing the inside of the camera body 1, the positional relationship between the movable barrel protruding portion 2 and the fixed barrel portion fitting portion 25 is constant. In addition, the positioning accuracy of the lens center of the imaging lens 14 can be increased.

  In the above embodiment, the claw retaining piece 22 is cut and raised from the chassis 10, but the claw portion 19 protruding from the outer periphery of the fixed lens barrel portion 15 of the imaging lens unit 13 is hung. The claw latching portion to be stopped may be formed by attaching a claw latching piece made of a member different from the chassis 10 to the chassis 10.

  In that case, the claw latching piece is supported by the chassis 10 via an elastic body such as a rubber material that deforms in the front-rear direction of the chassis 10, and the claw portion 19 is latched by the claw latching piece. It is preferable that the front end of the fixed barrel portion 15 be pressed against the fixed barrel portion fitting portion 25 on the inner surface of the front case 1a by the elasticity of the elastic body. The positioning accuracy of the lens 14 in the optical axis direction can be increased.

  A plurality of claw portions and claw retaining portions for temporarily fixing the imaging lens unit 13 to the front surface of the chassis 10 by defining positions in the lens optical axis direction and the lens circumferential direction are the same as those in the above embodiment. On the contrary, the claw portion may be provided on the chassis 10 so as to protrude from the front surface, and the claw retaining portion may be provided on the outer periphery of the fixed barrel portion 15 of the imaging lens unit 13.

1 is a perspective view of a digital camera showing an embodiment of the present invention. FIG. 2 is an exploded perspective view of the digital camera. The expanded sectional view of the digital camera. The enlarged view of the IV section of FIG. The perspective view of the nail | claw latching piece part of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Camera body, 1a ... Front side case, 1b ... Rear side case, 2 ... Movable lens barrel protrusion part, 3 ... Opening part, 4 ... Cosmetic ring, 10 ... Chassis, 13 ... Imaging lens unit, 14 ... Imaging lens, 15 DESCRIPTION OF SYMBOLS ... Fixed lens barrel part, 16 ... Movable lens barrel, 17 ... Solid-state image sensor (imaging system component), 18 ... Zooming motor (imaging system component), 19 ... Claw part, 21 ... Tongue piece, 22 ... Claw latch piece ( (Claw latching portion), 23... Latching hole, 24... Leaf spring, 25.

Claims (6)

A camera body comprising a front case and a rear case, wherein the front case is provided with a movable lens barrel protruding portion for projecting the movable lens barrel of the imaging lens forward;
A chassis positioned and positioned in the camera body;
An imaging lens having an imaging lens composed of a fixed barrel portion and a movable barrel that protrudes into and can be stored in the fixed barrel portion, and imaging system parts are provided inside and outside the fixed barrel portion With a unit,
The imaging lens unit is defined by defining the positions in the lens optical axis direction and the lens circumferential direction by engaging each other at a plurality of positions on the outer periphery of the fixed barrel portion of the imaging lens unit and the front surface of the chassis. There are provided a plurality of claw portions and a claw latching portion that are temporarily fixed to the front surface of the chassis,
A fixed barrel that defines the lens center position of the imaging lens unit by fitting the front end portion of the stationary barrel portion of the imaging lens unit along the periphery of the protruding portion of the movable barrel on the inner surface of the front case A digital camera in which a part fitting part is formed.   The plurality of claw portions project from the outer periphery of the fixed lens barrel portion of the imaging lens unit, and the plurality of claw latching portions are provided on the chassis so as to face the outer periphery of the fixed lens barrel portion. It consists of a nail | claw latching piece which has the elasticity deform | transformed in the direction which contacts / separates with respect to the outer peripheral surface of a cylinder part, and the latching hole of the said nail | claw part was formed. Digital camera.   The claw-holding piece is supported by the chassis via an elastic body that deforms in the front-rear direction of the chassis, and the front end of the fixed barrel portion that is hooked on the claw-holding piece is connected to the elastic body. The digital camera according to claim 2, wherein the digital camera is pressed against the fixed barrel portion fitting portion on the inner surface of the front case by the elasticity of the front case.   The digital camera according to claim 2, wherein the claw retaining piece is cut and raised from the chassis to the front side thereof.   The claw-holding piece is formed by cutting and raising the portion on the other end side of the tongue piece, which is connected to the chassis at one end and the other end and both sides are separated from the chassis. The front end of the fixed barrel portion that has the elasticity that bends and deforms in the front-rear direction of the chassis by the portion on the one end side of the chassis, and the nail portion is hooked on the claw retaining piece is fixed to the fixed barrel on the inner surface of the front case The digital camera according to claim 4, wherein a leaf spring that is pressed against the portion fitting portion is formed.   The movable barrel protruding portion of the front case is formed by fitting a decorative ring in an opening provided in the front portion of the front case, and a fixed barrel is provided on the surface of the decorative ring facing the camera body. The digital camera according to claim 1, wherein a part fitting part is formed.

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