JP2006309053A - Guide shaft holding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To highly accurately make the axial direction of a guide shaft coincide with the direction of an optical axis regardless of the component accuracy of a member supporting the guide shaft. <P>SOLUTION: A lens carrier 93 and a guide shaft 94 are fitted in a lower lens barrel 90 with an adjustment lever 110 fitted thereto. The lower end portion of the guide shaft 94 is fixed to a bearing portion 111a formed in the boss 111 of the adjustment lever 110. Thus, the guide shaft 94 is held in a cantilever manner in the lower lens barrel 90. After the position of the guide shaft 94 is adjusted by operating the adjustment lever 110, an adjustment plate 105 attached to the upper end of the guide shaft 94 is moved and fixed to the lower lens barrel 90 such that the axial direction of the guide shaft 94 is made to coincide with the direction of the optical axis. Consequently, the guide shaft 94 is held by the adjustment lever 110 and adjustment plate 105 fitted to the lower lens barrel 90. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a guide shaft holding method used in a lens apparatus including a zoom optical system that is used in an electronic still camera, a video camera, a silver salt camera, and the like and changes a photographing magnification.

In general, among cameras that are widely used, there is a so-called digital camera that captures a subject image formed by an imaging optical system with an imaging means such as a CCD. Some of such digital cameras have a so-called optical zoom function that changes the zoom magnification by moving an optical system that contributes to zoom in the optical axis direction by a drive source. In the case of a camera equipped with such an optical system for changing the zoom magnification, for example, it is conceivable to hold one end of the guide shaft with a holding frame and the other end with another component (Patent Document 1).
Japanese Patent Laid-Open No. 5-341168

  However, when supporting both ends of the guide shaft, it is ideally assembled so that the axial direction of the guide shaft coincides with the optical axis direction, but the assembly accuracy between the holding frame and other parts, If the accuracy of the other components themselves is poor, the guide shaft can be assembled with the axial direction of the guide shaft deviating from the optical axis direction, resulting in deterioration of the optical performance of the incorporated optical system.

  The present invention has been made to solve the above problems, and when the lens carrier is assembled to the holding frame, the axial direction of the guide shaft is the optical axis direction regardless of the component accuracy of the member that supports the guide shaft. It is intended to provide a guide shaft holding method that can be matched with high accuracy.

  The guide shaft holding method of the present invention includes a lens carrier that holds a lens and is movable in the optical axis direction by operation of a moving mechanism, a guide shaft that guides the movement of the lens carrier in the optical axis direction, and these members And a guide shaft holding method when the guide shaft is assembled to the lens barrel. The guide shaft is assembled to one end of the guide shaft, and the axial direction of the guide shaft is the optical axis. A shaft that includes a shaft misalignment adjusting member that adjusts the shaft misalignment of the guide shaft so as to coincide with the direction, and after the other end portion of the guide shaft is pivotally supported by the lens barrel, the shaft that is assembled to one end portion of the guide shaft By moving the displacement adjusting member and fixing the shaft displacement adjusting member in a state where the axial direction of the guide shaft coincides with the optical axis direction, the guide shaft is held by the lens barrel and the shaft displacement adjusting member. Characterized in that it.

  In addition, the lens barrel is assembled with a position adjustment member including a support portion that pivotally supports the other end of the guide shaft and a positioning lever that adjusts the position of the support portion from the outside of the lens barrel. After adjusting the position of the guide shaft by adjusting the position of the position adjusting member by operating the positioning lever, the shaft displacement of the guide shaft is adjusted by the shaft displacement adjusting member. .

  According to the guide shaft holding method of the present invention, the lens is held, the lens carrier that can move in the optical axis direction by the operation of the moving mechanism, the guide shaft that guides the movement of the lens carrier in the optical axis direction, A lens barrel in which these members are housed, and in the method of holding the guide shaft when the guide shaft is assembled to the lens barrel, the guide shaft is assembled to one end of the guide shaft, and the axial direction of the guide shaft is A shaft misalignment adjusting member that adjusts the shaft misalignment of the guide shaft so as to coincide with the optical axis direction is provided, and the other end portion of the guide shaft is pivotally supported on the lens barrel, and then assembled to one end portion of the guide shaft. The shaft displacement adjusting member is moved so that the shaft displacement adjusting member is fixed in a state where the axial direction of the guide shaft coincides with the optical axis direction, whereby the guide shaft is moved to the lens barrel and the shaft displacement adjusting member. In from hold, even when part accuracy of the lens barrel is less, it is possible to hold the guide shaft with high precision, it is no longer degrade the optical performance of the lens.

  In addition, the lens barrel is assembled with a position adjustment member including a support portion that pivotally supports the other end of the guide shaft and a positioning lever that adjusts the position of the support portion from the outside of the lens barrel. After adjusting the position of the guide shaft by adjusting the position of the position adjusting member by operating the positioning lever, the shaft displacement of the guide shaft is adjusted by the shaft displacement adjusting member. Even if the parts that support one end of the shaft are parts that are assembled to the lens barrel, it is possible to adjust the positioning of the guide shaft and adjust the shaft displacement of the guide shaft. Can be assembled to a lens barrel.

  The digital camera 10 shown in FIGS. 1 and 2 is provided with a photographing opening 12 and a strobe light emitting unit 13 on the front surface of a camera body 11, and a power button 14 and a shutter button 15 on the upper surface.

  On the back of the camera body 11, an LCD (Liquid Crystal Display) 16, a zoom operation button 17, a cursor button 18, and a mode switching button 19 are provided. The mode switching button 19 is operated by the user when switching between a photographing mode for recording a photographed image on a memory card, a reproduction mode for reproducing an image recorded on the memory card, and a setup mode for performing various settings.

  In addition to being used for image reproduction, the LCD 16 also functions as an electronic viewfinder that displays a through image for framing in the shooting mode. The LCD 16 displays a menu screen when the setup mode is set. The cursor button 18 is operated when moving the cursor on the menu screen or selecting an item displayed on the menu screen. The zoom operation button 17 is operated when changing the zoom magnification.

  FIG. 3 is a perspective view showing the front surface of the lens barrel of the digital camera 2 in a divided manner, and FIG. 4 is a perspective view showing the rear surface of the lens barrel. The imaging optical system incorporated in the lens barrel 20 is composed of a bending optical system using a prism 71 (see FIG. 7). By using this bending optical system, the thickness of the digital camera 2 can be reduced. The lens barrel 20 is composed of an upper unit 21 and a lower unit 22, and these two units are assembled together by screws 23 or the like. Reference numeral 24 denotes a shutter unit. In this embodiment, the shutter unit 24 is described as being included in the lower unit 22 for convenience. In FIG. 4, reference numeral 30 is a first drive unit, reference numeral 31 is a second drive unit, the first drive unit 30 is in the upper barrel 65, the second drive unit 31 is in the lower barrel 90, the screw 33, 34 or the like.

  FIG. 5 is an exploded perspective view showing the configuration of the first drive unit 30. The first drive unit 30 includes a bracket 40, a moving member 41, a drive motor 42, and a guide shaft 43. The bracket 40 has a substantially U-shape. In addition to the opening 44 through which the guide shaft 43 is inserted, the upper surface 40a and the lower surface 40b are each provided with an opening 45 through which the drive screw shaft 42a of the drive motor 42 is inserted. Reference numeral 46 (see FIG. 4) and reference numeral 47 are positioning holes through which the pins 65a provided on the upper barrel 65 are inserted into the first drive unit 30, and reference numeral 48 is an opening through which the screw 33 is inserted. is there.

  In the moving member 41, openings 41b and 41c through which the guide shaft 43 is inserted are provided in a base portion 41a having a cylindrical shape. A contact piece 41d and a pressing piece 41e are provided so as to protrude from the base portion 41a. A drive screw shaft 42a of the drive motor 42 is inserted between the contact piece 41d and the pressing piece 41e. The contact piece 41d is provided with a latch 41g, and the rotation of the drive screw shaft 42a is converted into the movement of the moving member 41 by meshing with the drive screw shaft 42a of the drive motor 42. Further, the moving member 41 includes a connecting piece 41h, and one end of a tension spring 82 (see FIG. 7) is attached to the connecting piece 41h. The guide shaft 43 is provided to restrict the moving direction of the moving member 41.

  FIG. 6 is an exploded perspective view showing the configuration of the second drive unit 31. Similar to the first drive unit 30, the second drive unit 31 includes a bracket 50, a moving member 51, a drive motor 52, and a guide shaft 53. The bracket 50 has a substantially U-shape. In addition to the opening 55 through which the guide shaft 53 is inserted, the upper surface 50a and the lower surface 50b are each provided with an opening 56 through which the drive screw shaft 52a of the drive motor 52 is inserted. Reference numeral 57 (see FIG. 4) and reference numeral 58 are positioning holes into which pins 90a provided in the lower barrel 90 are inserted when the second drive unit 31 is assembled to the lower barrel 90. The opening through which the screw 34 is inserted.

  In the moving member 51, openings 51b and 51c through which the guide shaft 53 is inserted are provided in a base 51a having a cylindrical shape. A contact piece 51d and a pressing piece 51e are provided so as to protrude from the base portion 51a. A drive screw shaft 52a of the drive motor 52 is inserted between the contact piece 51d and the pressing piece 51e. The abutment piece 51d is provided with a latch 51g, and meshes with the drive screw shaft 52a of the drive motor 52, thereby converting the rotation of the drive screw shaft 52a into the movement of the moving member 51. The moving member 51 includes a connecting piece 51h, and one end of a tension spring 97 (see FIG. 8) is attached to the connecting piece 51h. The guide shaft 53 is provided to restrict the moving direction of the moving member 51.

  As shown in FIG. 7, the upper unit 21 includes an upper barrel 65, a first lens group 66, a second lens group 67, a third lens group 68, and the like. The first lens group 66 includes a first lens 70, a prism 71, and a second lens 72. The first lens 70 is assembled to the upper barrel 65 after being inserted from the rear side of the lens holder 73. Two pins are provided on the front surface of the upper lens barrel 65, and the lens holder 73 is positioned at a predetermined position on the front surface of the upper lens barrel 65 by these pins. Reference numerals 74 and 75 are fasteners used when the lens holder 73 is fixed to the upper barrel 65.

  As the prism 71, an orthogonal prism in which the light incident surface 71a and the light emitting surface 71c are orthogonal to each other is used. The prism 71 causes the subject light flux in the first direction (reference numeral L1 in FIG. 7) taken in by the first lens 70 to enter from the light incident surface 71a, bends 90 degrees at the total reflection surface 70b, and enters the second direction (FIG. 7). The light is reflected by the intermediate code L2) and emitted from the light emitting surface 71c. The prism 71 is inserted into a prism housing 65b provided in the upper lens barrel 65, and then, for example, UV adhesive is injected from injection holes 65c and 65d provided in the wall surface of the prism housing 65b. It is fixed to the upper barrel 65. Reference numeral 76 denotes a dimming mask sheet.

  The second lens 72 is composed of, for example, two lenses, and these lenses are incorporated into a lens holder 77 made of, for example, metal. The lens holder 77 is housed in a lens housing portion (not shown) provided in the upper lens barrel 65 from below the upper lens barrel 65. At this time, the lens holder 77 is fixed to the upper barrel 65 with the mask sheet 76 held between the light emitting surface 71 c of the prism 71 and the second lens 72.

  The second lens group 67 is a lens group for changing the zoom magnification. The second lens group 67 is composed of, for example, three lenses and is incorporated in the lens carrier 78. The lens carrier 78 includes a storage portion 78a for storing the second lens group 67, and guide receiving portions 78b and 78c through which the guide shafts 79 and 80 are inserted. The guide receiving portion 78b is formed in a cylindrical shape, and its center is cut away. This portion is a storage portion 78d in which the torsion spring 81 is stored.

  The torsion spring 81 is provided to bring the guide shaft 79 assembled to the lens carrier 78 into contact with the inner wall surfaces of the openings 78g and 78h. Note that one end of the torsion spring 81 enters the recess 78e provided in the guide receiving portion 78b, and the other end enters the recess 78f. Thereby, for example, when the zoom magnification is changed, rattling of the lens carrier 78 when the lens holder 78 moves in the optical axis direction (L2 direction), and rattling of the lens carrier 78 due to vibration generated during photographing. Can be prevented.

  The guide receiving portion 78b is provided with a connecting piece 78i, and the other end portion of the tension spring 82 having one end portion attached to the connecting piece 41h of the moving member 41 is attached to the connecting piece 78i. . Accordingly, the moving member 41 of the first drive unit 30 and the lens carrier 78 are connected to each other, and the upper surface of the contact piece 78j provided so as to protrude from the guide receiving portion 78b, and the lower surface of the connecting piece 41h of the moving member 41 Are held in contact with each other. Although not shown, the lens carrier 78 is provided with an index, and the index carrier is detected by a photo interrupter assembled to the upper lens barrel 65, thereby grasping the reference position of the lens carrier 78. It is possible.

  The lens holder 85 is assembled and fixed to the bottom surface of the upper barrel 65 with screws 86 or the like. The upper surface of the lens holder 85 is provided with mounting holes 85c for fixing the third lens group 68 in addition to bearing portions 85a and 85b for holding the lower end portions of the guide shafts 79 and 80 described above.

  The third lens group 68 is a lens group for relaying the subject luminous flux from the second lens group 67 to the fourth lens group 91. Although FIG. 7 shows an example in which the third lens group 68 is composed of a single lens, it is not necessary to limit the number of lenses constituting the third lens group to one.

  As shown in FIG. 8, the lower unit 22 includes a shutter unit 24, a lower lens barrel 90, a fourth lens group 91, a CCD 92, and the like. The fourth lens group 91, the CCD 92, and the like are assembled to the lower lens barrel 90. The fourth lens group 91 is composed of, for example, three lenses and changes the zoom magnification. The fourth lens group 91 performs focus adjustment at the time of zoom magnification adjustment and focus adjustment at the time of shooting. The fourth lens group 91 is assembled to the lens carrier 93. In FIG. 8, the shutter unit is omitted. A lens device 96 is configured by the lens carrier 93 and the guide shafts 94 and 95.

  The lens carrier 93 includes guide receiving portions 93 b and 93 c through which the guide shafts 94 and 95 are inserted, in addition to the storage portion 93 a that stores the fourth lens group 91. The guide receiving portion 93b is formed in a cylindrical shape, and its central portion is cut away. This portion becomes a storage portion 93d in which the torsion spring 96 is stored. One end of the torsion spring 96 enters the recess 93e provided in the guide receiving portion 93b, and the other end enters the recess 93f. The lens carrier 93 is urged by the torsion spring 96, and the guide shaft 94 comes into contact with the openings 93g and 93h of the guide receiving portion 93b. Thereby, for example, when the lens carrier 93 moves in the optical axis direction (L2 direction), it is possible to prevent the lens carrier 93 from rattling or the rattling of the lens carrier 93 due to vibration generated during photographing. .

  The guide receiving portion 93b is provided with a connecting piece 93i, and the other end of the tension spring 97 is assembled to the connecting piece 93i. Thereby, the moving member 51 of the second drive unit 31 and the lens carrier 93 are connected to each other, and the upper surface of the contact piece 93j provided to protrude from the guide receiving portion 93b and the lower surface of the connecting piece 51h of the moving member 51 are connected. Are held in contact with each other. The lens carrier 93 has an index 93j and is detected by the photo interrupter 100 assembled to the side opening 90a of the lower barrel 90.

  The lower end portion of the guide shaft 94 described above is supported by an adjustment lever 110 (see FIG. 9) attached to the lower barrel 32. On the other hand, an adjustment plate 105 is attached to the upper end portion of the guide shaft 94.

  The adjustment plate 105 is formed of, for example, a metal plate, and includes an opening 105a through which the upper end portion of the guide shaft 94 is inserted, and an operation unit 105b bent downward by approximately 90 degrees. The adjustment plate 105 is provided to adjust the position of the upper end portion of the guide shaft 94 so that the axial direction of the guide shaft 94 coincides with the optical axis direction (L2 direction). The adjustment plate 105 is assembled in a state where the upper end portion of the guide shaft 94 is inserted into the opening 105 a and is sandwiched between the shutter unit 24 and the lower barrel 90. Since the operation unit 105b is exposed to the outside when sandwiched between the shutter unit 24 and the lower lens barrel 90, the operation unit 105b is operated to change the axial direction of the guide shaft 94 to the optical axis direction (L2 direction). ) To adjust the position of the adjustment plate 105. In addition, after the position adjustment by the adjustment plate 105 is performed, the operation portion 105 b of the adjustment plate 105 is fixed to the lower barrel 90. The shape of the adjustment plate 105 is not limited to the illustrated shape.

  A low-pass filter 98 and a CCD 92 are assembled at the lower end of the lower barrel 90. The low-pass filter 98 is used to prevent moire and false colors. The CCD 92 converts the imaged subject light into an imaging signal by forming the subject light transmitted through the fourth lens group 91 on the image plane. A plate spring 125 (see FIG. 9), which is a fixing member for fixing the adjustment lever 110 and the CCD 92 to the storage unit 70, is disposed at the lower end portion of the lower barrel 90. It is fixed in a state of being biased upward.

  As shown in FIGS. 9 and 10, the adjustment lever 110 is assembled to a holding portion 90 b provided at the lower end portion of the lower barrel 90. The adjustment lever 110 includes a boss 111 having a bearing hole 111a for receiving the lower end portion of the guide shaft 94, and a lever portion 113 that protrudes from the boss 111 and has an insertion hole 112 through which the adjustment pin 120 is inserted. ing. When the adjustment lever is incorporated in the lower barrel 90, the tip of the lever portion 113 protrudes from the lower barrel 90 to the outside, and this protruding portion becomes the grip portion 114. A groove 115 is formed between the grip portion 114 and the insertion hole 112 and on the lower surface of the lever portion 113. The groove 115 is formed along a direction orthogonal to the longitudinal direction of the grip portion 114 and has a V-shaped cross section. For this reason, it is possible to cut the handle portion 114 by folding the lever portion 113 in the groove 115.

  The insertion hole 112 is a long hole formed along the longitudinal direction of the lever portion 113, and the width of the long hole is substantially equal to the outer diameter of the main body 120 a of the adjustment pin 120. Also, as shown in FIG. 11, the distance LA between the edge of the gripping portion 114 and the center of the insertion hole 112 is longer than the distance LB between the center of the insertion hole 112 and the center of the bearing hole 111a. A positioning piece 116 is provided at a position rotated 180 degrees with respect to the lever portion 113.

  The adjustment pin 120 has a threaded portion 120b formed on the front end side of the main body 120a, and a head portion 120c formed with a cross groove on the rear end side. Further, a flange portion 120d is formed in the main body 120a of the adjustment pin 120, which is substantially the center in the axial direction. When the adjustment lever 110 is attached to the lower barrel 90, the spring 121 and the flat washer 122 are passed through the adjustment pin 120 from the screw portion 120b side, and the adjustment pin 120 is inserted through the insertion hole 112 from the screw portion 120a side. And the adjustment pin 120 is fixed to the holding | maintenance part 90b by screwing the screw part 120a in the screw hole formed in the holding | maintenance part 90b.

  At this time, the spring 121 is disposed between the adjustment lever 110 and the flange portion 120d, and the adjustment lever 110 is urged toward the holding portion 90b by the spring 121. Further, a spring 123 is inserted into the boss 111 from below, and the lower end of the spring 123 is held by the upper surface 125 a of the leaf spring 125. As a result, the adjustment lever 110 is biased toward the holding portion 90b by the spring 123, and the upper surfaces of the boss 111 and the connecting portion 86 abut against the holding portion 90b. Therefore, the lower lever 90 holds the adjustment lever 110 movably in a plane perpendicular to the optical axis direction (L2 direction) with the adjustment pin 120 as a fulcrum. As described above, the insertion hole 112 is a long hole, and its width is substantially equal to the outer diameter of the main body 120a of the adjustment pin 120. Therefore, the adjustment lever 110 is orthogonal to the longitudinal direction of the lever main body 113. Movement in the direction is restricted.

  Further, the leaf spring 125 is formed with two engagement holes 125b that engage with protrusions 90c formed on the side surface of the lower barrel 90, an insertion hole 125c through which the screw 126 is inserted, and a notch 125d. Yes. When the leaf spring 125 is attached to the lower barrel 90, the two engagement holes 125b are formed with the adjustment pin 120 temporarily fixed to the lower end of the lower barrel 90 being inserted into the notch 125d of the leaf spring 125. Engage with the protrusion 90c (see FIG. 8). Then, the screw 126 is inserted into the insertion hole 125c and screwed into the screw hole formed in the lower barrel 90, and the adjustment pin 120 and the screw 126 are permanently fixed. Thereby, the leaf spring 125 is fixed so as to cover the lower end of the lower barrel 90.

  Next, a manufacturing process of the lower unit 22 of the lens barrel 20 described above will be described. The adjustment lever 110 is temporarily fixed to the holding portion 90b of the lower barrel 90. Thereafter, the lens carrier 93 and the guide shafts 94 and 95 are housed in a housing portion 90d (see FIG. 10) provided in the lower barrel 90. The lower end of the guide shaft 94 is inserted into a bearing portion 111 a provided on the boss 111 of the adjustment lever 110. In this state, the adjustment plate 105 is attached to the upper end of the guide shaft 94, and the shutter unit 22 is assembled. At this time, the upper end portion of the guide shaft 94 is inserted into the bearing portion 22 a provided on the lower surface of the shutter unit 22. Since the inner diameter D1 of the bearing portion 22a provided on the lower surface of the shutter unit 22 is formed wider than the outer diameter D2 of the guide shaft 94, the guide shaft 94 is inserted into the bearing portion 111a of the adjustment lever 110. And clogged cantilever.

  Thereafter, the low-pass filter 98 and the CCD 92 are assembled to the lower end of the lower barrel 90, and then the leaf spring 125 is assembled. Finally, the second drive unit 31 is assembled to the lower barrel 90, and the connecting piece 93i of the lens carrier 93 and the connecting piece 51h of the moving member 51 are connected by the tension spring 97.

  In this state, by operating the adjustment lever 110 to move the adjustment lever 110 in the A direction or B direction in FIG. 11 or to rotate in the C direction or D direction in FIG. The position of the guide shaft 94 is adjusted. In addition, after adjusting the position of the guide shaft 94 by operating the adjustment lever 110, the inclination of the guide shaft 94 in the axial direction is adjusted by operating the adjustment plate 105. For example, the guide shaft 94 may be tilted with respect to the optical axis direction (L2 direction) and assembled to the lower barrel 90, and the axial direction of the guide shaft 94 does not match the optical axis direction (L2 direction). In this case, the position of the upper end of the guide shaft 94 is adjusted by moving the adjustment plate 105 in the E direction or F direction in FIG. 12 or in the G direction or H direction in FIG. Is adjusted so as to coincide with the optical axis direction (L2 direction). Thereby, the position of the lens carrier 93 to which the guide shaft 94 is assembled is adjusted. When the guide shaft 94 is assembled to the lower barrel 90, the adjustment plate 105 causes the axial direction of the guide shaft 94 and the optical axis direction (L2) even if the precision of the parts of the lower barrel 90 and the adjustment lever 110 is low. Direction).

  After the position adjustment and the inclination adjustment of the guide shaft 94 are performed, the adjustment pin 120 is permanently fixed, and the adjustment lever 110 and the adjustment plate 105 are fixed to the lower barrel 90 with an adhesive or the like. As a result, the lower end portion of the guide shaft 94 is pivotally supported by the bearing portion 111 a of the adjustment lever 110, and the upper end portion of the guide shaft 94 is pivotally supported by the adjustment plate 105. The above-described position adjustment and inclination adjustment of the guide shaft 94 are performed using a dedicated test instrument although details are not described.

  Thereby, the completed lower unit 22 is assembled in the digital camera 10 in a state of being assembled with the upper unit 21 manufactured in another process. As a result, the lower end portion of the guide shaft 94 is pivotally supported by the bearing portion 111 a provided on the boss 111 of the adjustment lever 110, and the upper end portion of the guide shaft 94 is pivotally supported by the adjustment plate 105. Therefore, for example, the so-called collapse of the guide shaft 94 caused by an impact when the digital camera 2 is accidentally dropped or the axial direction of the guide shaft 94 is inclined with respect to the optical axis direction is prevented. be able to.

  In this embodiment, after adjusting the inclination of the guide shaft with the adjustment plate, the adjustment plate is fixed to the lower barrel with an adhesive, but it is not necessary to be limited to this, and it can be fixed using screws. is there. In addition, when the screws are fixed, if it is feared that the screws are loosened, it is possible to fix the adjustment plate to the lower barrel using an adhesive.

  In this embodiment, the example of the guide shaft incorporated in the lower lens barrel is taken up. However, the present invention is not limited to this. For example, the present invention can be used for the guide shaft incorporated in the upper lens barrel. In this embodiment, an example of a digital camera has been described. However, the present invention can also be used for, for example, a silver salt camera or a video camera.

It is a perspective view which shows the external appearance of the front surface of a digital camera. It is a perspective view which shows the external appearance of the rear surface of a digital camera. It is a perspective view which shows the structure of the front side of a lens-barrel. It is a perspective view which shows the structure of the rear surface side of a lens-barrel. It is a perspective view which decomposes | disassembles and shows the structure of a 1st drive unit. It is a perspective view which decomposes | disassembles and shows the structure of a 2nd drive unit. It is a perspective view which decomposes | disassembles and shows the structure of an upper unit. It is a perspective view which decomposes | disassembles and shows the structure of a lower unit. It is a perspective view which shows the structure of the vicinity of the adjustment lever assembled | attached to the lower end part of a lower lens-barrel. It is sectional drawing which shows the structure of the vicinity of the adjustment lever assembled | attached to a lower lens-barrel. It is a front view which shows the adjustment lever vicinity. It is a front view which shows the adjustment board vicinity.

Explanation of symbols

2 Digital camera 20 Lens barrel 21 Upper unit 22 Lower unit 30 First drive unit 31 Second drive unit 90 Lower barrel 91 Fourth lens group 93 Lens carrier 94, 95 Guide shaft 96 Lens device 105 Adjustment plate 110 Adjustment lever 111a Bearing part

Claims (2)

A lens carrier that holds a lens and is movable in the optical axis direction by operation of a moving mechanism, a guide shaft that guides the movement of the lens carrier in the optical axis direction, and a lens barrel that stores these members In the method for holding the guide shaft when assembling the guide shaft to the lens barrel,
An axis deviation adjusting member that is assembled to one end of the guide axis and adjusts the axis deviation of the guide axis so that the axial direction of the guide axis coincides with the optical axis direction;
After the other end portion of the guide shaft is pivotally supported on the lens barrel, an axial deviation adjusting member assembled to one end portion of the guide shaft is moved so that the axial direction of the guide shaft matches the optical axis direction. A guide shaft holding method, wherein the guide shaft is held by the lens barrel and the shaft deviation adjusting member by fixing the shaft deviation adjusting member in a state. The lens barrel is assembled with a position adjusting member including a support portion that pivotally supports the other end of the guide shaft and a positioning lever that adjusts the position of the support portion from the outside of the lens barrel. The shaft displacement of the guide shaft is adjusted by the shaft displacement adjustment member after the position of the guide shaft is adjusted by adjusting the position of the position adjustment member by operating a lever. The guide shaft holding method according to claim 1.

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