JP2009237478A - Prism mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prism mounting structure improving work efficiency in attaching a spectral prism. <P>SOLUTION: A mobile body 7 is journaled in a longitudinally slidable manner to a shaft 61 mounted to the rear face of a front frame 2, and a positioning spring 63 is externally fitted to the rear side of the mobile body 7. A control pin 5 is journaled to a control pin holding body 3, and a control shaft 53 of the control pin 5 is inserted in a control elongate hole 71 of a control body 7b provided at the mobile body 7 together with a collar 54. A presser plate 33 is thread-fastened to the control pin holding body 3 and the shaft 61 externally fitted with the positioning spring 63. A prism base 9 with a prism 93 bonded thereto is thread-fastened to the left face of the mobile body 7. The shaft 61 is laterally positioned being constantly pressed to the right side inner peripheral surface of a shaft insertion hole 73 by the energization of a plate spring 8 mounted to the mobile body 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a prism mounting structure that splits incident light from a mount lens.

  As this type of prism mounting structure, a flange back adjusting mechanism described in Patent Document 1 below is disclosed. This flange back adjustment mechanism is composed of a pair of guide shafts provided on the front panel side by side on the left and right sides of a lens mount, and a prism base to which a spectral prism is bonded. Prepared in the body. Each guide shaft extends parallel to the optical axis of the lens mount. Side plate portions are provided on the left and right sides of the prism base. An insertion hole for the guide shaft is formed in the left side plate portion, and a holding portion facing the right side plate portion in parallel is provided in the right side plate portion. The right side plate portion and the holding portion have a U-shape when viewed from the side, and a guide shaft insertion hole is formed at each opposing position.

  The prism base is attached to the front panel by inserting the right guide shaft into the insertion holes of the right and left plate parts and the left guide shaft through the left plate part, and screwing the spectral prism through the reinforcing bracket. ing.

  Between the right side plate portion and the holding portion of the prism base, a dial for adjusting the position of the prism base and a coil spring are interposed by being fitted on the guide shaft in this order from the right side plate portion side. The dial is screwed to the guide shaft. When the dial is rotated, the guide shaft is moved back and forth by a screw operation, and the prism base integrated through the coil spring is moved back and forth together with the prism accessory. Thereby, adjustment of a flange back is performed.

JP 2001-177754 A

  In the conventional flange back adjustment mechanism described above, the prism accessory is screwed to the left and right sides of the prism base via reinforcement brackets, and the prism base is positioned and attached to the left and right sides of the front panel across the lens mount. Was cumbersome.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a prism mounting structure capable of improving the workability of assembling a spectral prism.

  In order to achieve such an object, the prism mounting structure of the present invention includes a prism fixing member to which a spectroscopic prism is fixed, and a support body that is located on one side of the lens mount and is movable in the flange back adjustment direction. And a prism holding member that holds an end of the prism fixing member located on the one side of the lens mount, and a control unit that controls movement of the prism holding member in the flange back adjustment direction. It is characterized by that.

  According to the present invention, since the prism fixing member can be attached to the prism holding member on one side of the lens mount, the workability of assembling the spectroscopic prism can be improved.

Hereinafter, the best mode of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view illustrating an outline of an external configuration of a housing 1 of the television camera according to the present embodiment. FIG. 2 is an exploded perspective view from the rear of the front frame 2 of the flange back adjusting mechanism built in the housing 1. FIG. 3 is a diagram schematically showing the outline of the configuration of the control pin 5. It should be noted that the front, rear, left, and right directions used in the following description are shown in the drawings used for the description.

  The television camera is configured by attaching a mount-type lens (not shown) to the front end surface of the housing 1 shown in FIG. The housing 1 is configured by attaching a front frame 2 to a front end of a top panel 1a and a bottom panel 1b that are combined with each other to form a cylindrical shape, and a rear frame 1c to a rear end. In the case 1, incident light from a lens (not shown) is split into R (red), B (blue), and G (green) and guided to an image sensor (CCD) provided for each light. And a flange back adjusting mechanism for adjusting the flange back of the prism optical system.

  As shown in FIG. 2, the front frame 2 is constituted by a substantially rectangular flat plate, and a circular mount mounting hole 2a is formed at the center thereof. A ring-shaped lens mount (not shown) is fitted into the mount mounting hole 2a. The lens mount is for mounting a mount type lens, and an internal thread portion for screwing the lens mount is provided on the inner peripheral surface.

  On the right side of the mount mounting hole 2a, a shaft mounting hole 21 for screwing a shaft 61 described later is formed. The vertical position of the shaft center of the shaft mounting hole 21 is set to the same position as the vertical position of the shaft center of the mount mounting hole 2a. On the right side of the mount mounting hole 2a located below the shaft mounting hole 21, a pin mounting hole 22 to be screwed with a guide pin 62 described later is formed.

  A pair of holding body attachment holes 23 are formed in the right edge portion of the inner surface of the front frame 2 so as to be positioned on the upper end side and the lower end side with the mount mounting hole 2a interposed therebetween. A screw A used for screwing a control pin holder 3 to be described later is screwed into the holder attachment hole 23. In addition, at the four corners of the inner surface of the front frame 2, screw fastening pieces 2b used for screwing the top panel 1a or the bottom panel 1b are provided. Each screwing piece 2b is formed with a screw hole for screwing a screw for screwing or an insertion hole for a screw for screwing.

  The control pin holding body 3 screwed to the holding body mounting hole 23 and attached to the inner surface of the front frame 2 includes a main body 3a having a substantially square block shape, an upper end from the upper end of the front edge of the main body 3a, and a lower end. It has a shape including a pair of extended pieces 3b, 3b each having a square plate shape extending downward. Each extension piece 3b is formed with an insertion hole 3b1 for a screw A that is screwed into the holding body mounting hole 23 of the front frame 2 described above.

  A bulging portion 3d having a square plate shape is provided on the right surface of the main body 3a. The bulging portion 3d is located at the center portion of the main body 3a in the vertical direction, and extends from the front edge of the main body 3a to the rear portion to the center portion of the main body 3a in the front-rear direction. The bulging portion 3d is formed with a circular sphere housing hole 31 penetrating from the front surface to the rear surface. The spherical body 41 and the biasing spring 42 are accommodated in the spherical body accommodation hole 31 in this order from the rear side so as to be movable in the extending direction of the spherical body accommodation hole 31. A female screw portion (not shown) to which the movement restricting screw 43 is screwed is provided in the front end opening of the spherical body housing hole 31. The forward movement of the sphere 41 and the biasing spring 42 housed in the sphere housing hole 31 is restricted by a movement restricting screw 43 screwed into the front end opening of the sphere housing hole 31.

  The main body 3a is formed with a circular pin insertion hole 32 that is located behind the bulging portion 3d and penetrates from the right surface to the left surface. The pin insertion hole 32 is a hole through which a control pin 5 to be described later is inserted, and has an axis that intersects with the axis of the sphere housing hole 31 of the bulging portion 3d substantially at a right angle. The control pin 5 that is inserted through the pin insertion hole 32 includes a head 51 that has a substantially disk shape, and a shaft 52 that extends leftward from the left end surface of the head 51. On the outer peripheral surface of the head 51, a plurality of concave grooves 51b extending in the left-right direction across the left and right ends are formed at equal intervals along the circumferential direction. Further, on the right end surface of the head 51, an operation groove 51a for inserting a tool and rotating the control pin 5 clockwise or counterclockwise is formed extending in the warp direction.

  The shaft portion 52 has an outer diameter that is substantially equal to the inner diameter of the pin insertion hole 32 and a length that is substantially the same as the length of the pin insertion hole 32, and the control shaft 53 protrudes to the left from the left end surface. Yes. The control shaft 53 is a cylindrical body having an axis that is eccentric with respect to the axis of the shaft portion 52, and when the shaft portion 52 of the control pin 5 is inserted into the pin insertion hole 32 as shown in FIG. 3. , Protruding from the left end opening of the pin insertion hole 32 to the left of the main body 3a. A stainless steel collar 54 having a cylindrical shape is externally fitted to the control shaft 53. The outer diameter of the collar 54 is set to be approximately equal to the width before and after the control slot 71 of the moving body 7 described later, or slightly shorter than the width before and after the control slot 71.

  The rotation diameter of the axis 53A of the collar 54 that rotates in the control slot 71 around the axis 52A of the shaft 52 as the control pin 5 rotates in the pin insertion hole 32 includes the control slot 71. It is set equal to the distance between the movement limits before and after the moving body 7 described later. That is, the shaft center 53A of the control shaft 53 is displaced in the longitudinal direction from the shaft center 52A of the shaft portion 52 by a distance L equal to the distance from the neutral position of the moving body 7 provided with the control slot 71 to the front and rear movement limits. Is located.

  As shown in FIG. 2, a pair of screw holes 3a1 and 3a1 into which a screw C for screwing the holding plate 33 is screwed are formed in the rear end surface of the main body 3a side by side in the vertical direction. The presser plate 33 is bent at the right edge forward to form a bent piece 33a. The bent piece 33a is positioned on the right side of the rear peripheral edge of the head 51 of the control pin 5 inserted through the pin insertion hole 32, and is used for positioning the control pin 5 in the left-right direction.

  The shaft 61 attached to the shaft attachment hole 21 of the front frame 2 includes a flange 61a at the front end portion of the round bar, and the front side of the flange 61a is the attachment portion 61b to the front frame 2 and the rear side will be described later. The shaft support 61c of the moving body 7 is provided. The mounting portion 61 b is screwed into the shaft mounting hole 21 of the front frame 2 from the rear side, and fastens the shaft 61 to the front frame 2. A plate mounting hole 61d into which a screw C for screwing the above-described presser plate 33 is screwed opens in the rear end surface of the shaft support portion 61c. A positioning spring 63 is fitted on the shaft support 61c.

  The positioning spring 63 is for urging the moving body 7 supported by the shaft support portion 61c forward. The positioning spring 63 is compressed by pressing the rear end of the holding plate 33, and the elastic body forces the moving body 7 to move. Energize forward. The guide pin 62 has a front side of the flange 62a that is configured in the same manner as the mounting part 61b of the shaft 61 and is attached to the front frame 2, and a rear side that controls the rotation of the movable body 7 described later in the left-right direction. This is a portion 62c.

  The movable body 7 pivotally supported by the shaft 61 has a schematic shape in which a central portion in the front-rear direction from the center portion in the left-right direction to the right end of the square block body is cut out in a square block shape from the top surface to the center portion in the vertical direction. The main body 7a, a control body 7b extending rearward from the rear surface of the main body 7a, and a guide piece 7c extending downward from the lower surface of the main body 7a are integrally configured. The control body 7b has a substantially square block shape, and includes a control slot 71 that opens at the center of the right surface in the front-rear direction.

  The control slot 71 extends in the vertical direction on the right surface of the control body 7 b and has a depth in the left-right direction that is substantially the same as the control shaft 53 and the collar 54 or longer than the length of the control shaft 53 and the collar 54. is doing. The guide piece 7c has a square plate shape and includes a guide hole 72 that penetrates from the front surface to the rear surface (see FIGS. 4 and 6). The guide hole 72 is composed of a long hole that extends in the vertical direction and has a width that is substantially the same as or slightly wider than the outer diameter of the rotation restricting portion 62c of the guide pin 62.

  The main body 7a and the control body 7b are formed with a shaft insertion hole 73 that extends through the front wall of the main body 7a from the front surface to the rear surface and then extends from the rear wall of the main body 7a to the rear surface of the control body 7b. Has been. The shaft insertion hole 73 is formed in a circular shape having an inner diameter that is substantially the same as or slightly larger than the outer diameter of the shaft support portion 61 c of the shaft 61.

  Further, an insertion hole 7a1 for a screw B for screwing the prism base 9 to the moving body 7 is formed on the left wall of the main body 7a (see FIG. 5). In addition, a pair of fitting protrusions 7a2 and 7a2 arranged in the front-rear direction across the insertion hole 7a1 are provided on the left surface of the left wall (see FIG. 5). The fitting protrusions 72a and 72a are fitted into fitting holes 92 and 92 of the prism base 9 which will be described later, and the prism base 9 is fixed to the moving body 7 together with the screws B inserted into the insertion holes 7a1. The movement of the prism base 9 in the rotation direction around the hole 7a1 is restricted.

  A leaf spring 8 that presses the shaft 61 against the inner peripheral surface of the shaft insertion hole 73 is attached to the main body 7a. The leaf spring 8 includes locking pieces 81, 81 extending downward from the right edge of the front and rear ends of the substantially rectangular flat plate 8a made of metal, and the lower edge from the left edge of the central portion in the front-rear direction of the flat plate 8a. And a pressing piece 82 extending in the direction. The leaf spring 8 locks the lower end of the locking piece 81 to the lower surface of the main body 7a and presses the pressing piece 82 against the left side surface of the shaft support portion 61c of the shaft 61 so that the interval between the locking piece 81 and the pressing piece 82 is increased. It expands and elastically deforms and is attached to the moving body 7, and the shaft support 61 c is urged to the right and pressed against the right inner peripheral surface of the shaft insertion hole 73.

  The prism base 9 attached to the moving body 7 is a ceramic substantially rectangular block body for fixing the prism 93 to the moving body 7, and the right surface of the prism 93 is bonded to the left surface. A screw hole 91 into which a screw B for screwing the prism base 9 to the moving body 7 is screwed is formed at the center of the right surface of the prism base 9. In addition, fitting holes 92 and 92 into which fitting protrusions 7a2 and 7a2 (see FIG. 5) are fitted are provided on the front side and the rear side of the right surface across the screw hole 91.

  The prism 93 bonded to the prism base 9 is provided with a mounting plate 93a for each of the light emission surfaces of the separated three colors. A CCD fixing plate 94 having a CCD for imaging each color that has been dispersed is attached to each mounting plate 93a. The CCD fixing plate 94 has a packing 94a on the mounting surface to the mounting plate 93a, and is attached to the mounting plate 93a by pressing the packing 94a against the peripheral edge of the mounting window 93b provided in the mounting plate 93a.

  A structure for attaching the prism 93 to the front frame 2 by the flange back adjusting mechanism having such a configuration will be described. 4 to 6 are diagrams showing a mounting structure of the prism 93 by the flange back adjusting mechanism. 4A and 4B are cross-sectional views of the mounting structure of the prism 93 as viewed from the right. FIG. 4A shows the support structure of the moving body 7 and FIG. 4B shows the support structure of the control pin 5. 5A and 5B are cross-sectional views of the mounting structure of the prism 93 as viewed from above. FIG. 5A is a support structure for the moving body 7, FIG. 5B is a support structure for the control pin 5, and the prism base 9 to the moving body 7. It is shown with the mounting structure. 6A and 6B are cross-sectional views of the prism 93 mounting structure as viewed from the rear. FIG. 6A illustrates the mounting structure of the moving body 7 and the prism base 9, and FIG. 6B illustrates the positioning structure of the shaft 61. FIG.

  As shown in FIG. 4A, a shaft 61 screwed to the shaft mounting hole 21 and a guide pin 62 screwed to the pin mounting hole 22 are respectively attached to the rear surface of the front frame 2. Yes. A movable body 7 in which the shaft 61 is inserted into the shaft insertion hole 73 is pivotally supported on the shaft 61 so as to be slidable in the front-rear direction. A positioning spring 63 is externally fitted on the rear side of the movable body 7. (See also FIG. 5 (a)). The moving body 7 has its guide pin 62 inserted through the guide hole 72 of the guide piece 7c, and its rotation about the shaft 61 is restricted (see also FIG. 6). As shown in FIG. 4B, the control pin holding body 3 is attached to the rear surface of the front frame 2 by screwing the extending pieces 3b, 3b (see also FIG. 6).

  As shown in FIG. 5, the shaft portion 52 of the control pin 5 is inserted into the pin insertion hole 32 of the control pin holding body 3, and the control shaft 53 protruding from the left end of the shaft portion 52 is connected to the moving body 7. The collar 54 is inserted into the control slot 71 of the control body 7b provided (see also FIG. 4B). As shown in FIG. 5 (b), the sphere 41 is accommodated in the sphere housing hole 31 of the bulging portion 3d provided in the control pin holding body 3, and is always urged rearward by the urging spring 42. The rear end portion protrudes from the rear end opening of the storage hole 31 (see also FIG. 4B). The sphere 41 enters the concave groove 51b included in the head 51 of the control pin 5, presses the outer peripheral surface of the head 51, and restricts the rotation of the control pin 5 (see also FIG. 4B).

  As shown in FIG. 5, a pressing plate 33 is screwed to the main body 3a of the control pin holder 3 and the shaft 61 on which the positioning spring 63 is externally fitted (see also FIG. 4). The positioning spring 63 is compressed by the presser plate 33 to urge the moving body 7 forward, and constantly presses the rear inner surface of the control slot 71 against the collar 54 fitted on the control shaft 53 of the control pin 5. ing. The bent piece 33a of the presser plate 33 is positioned on the right side of the rear peripheral edge of the head 51 provided in the control pin 5 to position the control pin 5 in the left-right direction (see also FIG. 4B). On the left surface of the moving body 7, the prism base 9 to which the prism 93 is bonded is positioned and screwed with a pair of fitting projections 7a2 and 7a2 fitted into the fitting holes 92 and 92.

  As shown in FIG. 6B, the shaft 61 is urged to the right from the pressing piece 82 of the leaf spring 8 attached to the moving body 7, and is always pressed against the right inner peripheral surface of the shaft insertion hole 73. The positioning in the left-right direction is performed (see also FIG. 5 (a)).

  Next, the operation of the flange back adjustment mechanism configured as described above will be described.

  When a tool is inserted into the operation groove 51 a of the head 51 and the control pin 5 is rotated clockwise or counterclockwise about the axis, the biasing force applied from the biasing spring 42 via the spherical body 41 is resisted. Thus, the control pin 5 rotates in the operation direction. As the sphere 41 repeatedly advances and retreats in each concave groove 51b of the head 51 along with this rotation, the force required for the rotation operation of the control pin 5 also changes accordingly.

  Further, the control shaft 53 rotates around the axis of the control pin 5, and the outer peripheral surface of the collar 54 that is externally fitted is slidably contacted with the inner peripheral surface of the control slot 71 while moving in the vertical direction. It moves back and forth with the moving body 7 including the body 7b. The prism base 9 fixed to the moving body 7 moves the prism 93 back and forth as the moving body 7 moves in the front-rear direction. In this way, the flange back is adjusted.

  As described above, according to the television camera of the present embodiment, the movable body 7 holds the right end portion of the prism base 9 positioned on the right side of the lens mount (mount mounting hole 2a) with the prism 93 interposed therebetween. Due to the configuration, the prism base 9 can be attached to the movable body 7 on the right side of the lens mount. For this reason, the workability of assembling the prism 93 to the front frame 2 can be improved.

  Further, according to the television camera of the present embodiment, the control shaft 53 rotates along the front-rear direction, which is the flange back adjustment direction, according to the rotation operation of the control pin 5 with respect to the head 51, thereby controlling the moving body 7. Since the long hole 71 is pressed in the direction of the rotating control shaft 53 to move the moving body 7 in the flange back adjustment direction, the head 7 of the control pin 5 is rotated once to move the moving body 7 at both ends. It can be reciprocated between limits. For this reason, the adjustment operation of the flange back can be simplified.

  Further, according to the television camera of the present embodiment, the movable body 7 is urged in the flange back adjustment direction by the positioning spring 63 and the control slot 71 is pressed in the direction of the control shaft 53, so Since the positioning in the flange back adjustment direction is performed, the accuracy of the flange back adjustment can be increased. In addition, vibration or the like applied to the moving body 7 during photographing can be suppressed.

  Further, according to the television camera of the present embodiment, the moving body 7 is pressed against the side surface of the shaft 61 that pivotally supports the moving body 7, and the moving body 7 is positioned with respect to the shaft 61 in the direction orthogonal to the flange back adjustment direction. Therefore, the accuracy of flange back adjustment can be increased. In addition, vibration or the like applied to the moving body 7 during photographing can be suppressed.

  Further, according to the television camera of this embodiment, the control shaft 53 can be slid with respect to the control long hole 71 by the collar 54 interposed between the control shaft 53 and the control long hole 71. The vertical movement of the moving body 7 accompanying the rotation of the shaft 53 can be suppressed. For this reason, the precision of flange back adjustment can be improved. That is, a vertical force is applied to the moving body 7 from the control shaft 53 that slides up and down in contact with the inner surface of the control slot 71, and the moving body 7 moves up and down by the gap between the shaft 61 and the moving body 7. Although there is a possibility that the optical axis of the prism 93 fixed to the moving body 7 via the base 9 may be displaced, the collar 54 is externally fitted to the control shaft 53 to improve the sliding property, and the inner surface of the control slot 71 is slid. By reducing the frictional resistance generated at the time of contact, the moving body 7 can be moved back and forth without moving up and down, and the flange back adjustment with smooth movement becomes possible.

  Further, according to the television camera of the present embodiment, since the prism 93 is fixed to the prism base 9 by bonding the right side surface, the displacement of the prism 93 with respect to the optical axis of the mount lens (not shown) is suppressed. Thus, highly accurate shooting can be performed. For example, when the prism 93 is supported by the prism base 9 so as to be sandwiched from both sides and the supported both side surfaces are fixed to the prism base 9 with an adhesive or a screw, the prism base 9 and the prism 93 are heated by heat during shooting or the like. When the swells, the difference in linear expansion coefficient between the two causes peeling of the adhesive and an excessive load on the prism, which may reduce the imaging accuracy. However, according to the configuration of the present embodiment in which one side surface of the prism is fixed to the prism holder, it is possible to suppress the influence of the difference in linear expansion coefficient between the prism and the prism holder, and to prevent the photographing accuracy from being lowered.

  In the above embodiment, the case where the three-plate prism optical system is built in the housing 1 of the television camera has been described. However, another prism such as a four-plate prism optical system may be provided. Moreover, the attachment method to the front frame 2 of the shaft 61, the guide pin 62, and the control pin holding body 3 is also arbitrary, and these may be formed integrally with the front frame 2. Further, the shaft 61, the guide pin 62, and the control pin holder 3 may be provided on the top panel 1a or the bottom panel 1b.

  In the above embodiment, the case where the movable body 7 is pivotally supported by the shaft 61 and supported so as to be movable in the front-rear direction has been described. However, the structure which supports the movable body 7 so that movement to the front-back direction which is a flange back adjustment direction is possible is arbitrary. Further, as long as the rotation of the moving body 7 with respect to the shaft 61 can be restricted, the guide pin 62 may not be provided.

  Moreover, although the said embodiment demonstrated the case where a tool was inserted in the operation groove 51a of the head 51 of the control pin 5, and the control pin 5 was rotated clockwise or counterclockwise, the control pin 5 is rotated. The method is arbitrary. For example, a protrusion extending in the warp direction may be provided instead of the operation groove 51a of the head 51, and the protrusion may be picked and rotated by hand.

  Moreover, in the said embodiment, the spherical body 41 is pressed on the outer peripheral surface of the head 51 of the control pin 5, the rotation angle of the control pin 5 is notified to the operator, and the rotation of the control pin 5 is restricted. did. However, notification of the rotation angle of the control pin 5 and rotation restriction of the control pin 5 may be performed by other means, and when it is not necessary to perform these, the sphere 41 is pushed against the outer peripheral surface of the head 51. It is not always necessary to hit.

  In the above embodiment, the case where the head 51 of the control pin 5 is supported from the right side by the bent piece 33a of the pressing plate 33 has been described. However, if it is possible to prevent the control pin 5 from falling out of the pin insertion hole 32, the bent piece 33a is not necessarily provided. The configuration of the control pin 5 is arbitrary as long as the movable body 7 can be moved back and forth by rotating the control shaft 53 in the control slot 71 according to the rotation operation of the head 51.

  In the above embodiment, the case where the pressed portion is configured by the control slot 71 has been described. However, a cutout extending in the vertical direction of the control body 7b is provided instead of the control slot 71, and inner surfaces before and after the cutout are provided. It is good also as a pressed part. In the above embodiment, the case where the prism 93 is attached to the prism base 9 has been described. However, the prism 93 may be attached by other methods such as screwing.

  The method of attaching the prism base 9 to the moving body 7 is not limited to screwing. Moreover, although the said embodiment demonstrated the case where the shaft 61 was pressed on the internal peripheral surface of the shaft insertion hole 73 using the leaf | plate spring 8, for example, a shaft insertion is carried out from either the up-down or left-right surface of the moving body 7. A screw hole penetrating through the hole 73 is provided, and a steel ball and a coil spring are inserted into the screw hole, and then fixed with a screw. The shaft 61 may be pressed against the inner peripheral surface of the shaft insertion hole 73 by the pressing force of the steel ball. . The shape of the leaf spring 8 is also arbitrary. For example, the number of the locking pieces 81 and the pressing pieces 82 can be selected as appropriate.

As mentioned above, although embodiment of this invention was described, the following can be mentioned as an embodiment of this invention.
The prism mounting structure according to the first embodiment includes a prism fixing member to which a spectroscopic prism is fixed, and a support that is positioned on one side of the lens mount and is movable in a flange back adjustment direction. A prism holding member that holds an end portion of the prism fixing member located on one side, and a control unit that controls movement of the prism holding member in the flange back adjustment direction.
In addition, the prism mounting structure according to the second embodiment is the same as that according to the first embodiment, in which the control unit rotates the output unit along the flange back adjustment direction according to a rotation operation on the operation unit, and the prism. And a pressed part that is provided on a holding member and is pressed by the rotating output part to move the prism holding member in a flange back adjustment direction.
In addition, the prism mounting structure according to the third embodiment includes a biasing unit that biases the prism holding member in the flange back adjustment direction and presses the pressed portion against the output portion in the second embodiment. And
Further, the prism mounting structure according to the fourth embodiment is a sliding structure according to the second or third embodiment, wherein the prism is interposed between the output portion and the pressed portion to slide the output portion relative to the pressed portion. A member is provided.
In addition, the prism mounting structure according to the fifth embodiment is the prism mounting structure according to any one of the first to fourth embodiments, wherein the prism holding member is pivotally supported on the support body so as to be movable in the flange back adjustment direction. And an urging means for urging the shaft in a direction orthogonal to the flange back adjustment direction and pressing the urging shaft against the support shaft.

It is a perspective view which shows the outline of the external appearance structure of the housing | casing of the television camera of one Embodiment of this invention. It is a disassembled perspective view from the back of the front frame of the flange back adjustment mechanism built in the housing | casing. It is a figure which shows the outline of a structure of a control pin typically. It is a 1st figure which shows the attachment structure of the prism by a flange back adjustment mechanism. It is a 2nd figure which shows the attachment structure of the prism by a flange back adjustment mechanism. It is a 3rd figure which shows the attachment structure of the prism by a flange back adjustment mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Front frame 3 Control pin holding body 31 Sphere housing hole 32 Pin insertion hole 33 Press plate 41 Sphere 42 Energizing spring 5 Control pin (control means, rotary pressing body)
51 head (operation unit)
52 Shaft part 53 Control axis (output part)
54 Color (sliding member)
61 Shaft (support shaft)
62 Guide pin 63 Positioning spring (biasing means)
7 Moving body (prism holding member)
7a1 insertion hole 7a2 fitting protrusion 71 control slot (control means, pressed part)
72 Guide hole 73 Shaft insertion hole 8 Leaf spring (biasing means)
9 Prism base (prism fixing member)
93 Prism (spectral prism)
93a Mounting plate 94 CCD fixing plate 94a Packing

Claims (1)

A prism fixing member to which the spectral prism is fixed;
A prism holding member that is positioned on one side of the lens mount and is supported by the support so as to be movable in the flange back adjustment direction, and holds an end of the prism fixing member located on the one side of the lens mount;
A prism mounting structure comprising: control means for controlling movement of the prism holding member in the flange back adjustment direction.

Images