JP4414848B2 - Camera frame structure - Google Patents

Description

  The present invention relates to a frame structure of a camera that holds an optical system and an electrical system.

Cameras such as film cameras, digital cameras, and video cameras are basically composed of an optical system, electrical system, and various mechanisms, and the housing that holds the optical system, electrical system, and various mechanisms is larger. It is required to have rigidity. Conventionally, the following problems have been pointed out regarding camera housings.
(1) How to maintain the overall rigidity against external force, for example, how to hold a component that directly receives external force, such as a threaded portion of a tripod screw. How to prevent distortion.

(2) How to protect the optical system, electrical system, and various mechanisms against impact, for example, how to apply impact while preventing image sensor mounting part distortion, electrical circuit board cracking, soldering part peeling, etc. Do you absorb?

(3) How to attach and hold the optical system, mechanical parts of various mechanisms, and operation members.
(4) Will the electrical system be assembled as follows?

  For example, in Japanese Patent Laid-Open No. 2001-285696, a fixing member, an image sensor, and a circuit are different from a conventional arrangement that is positioned in the order of an image sensor (image sensor package), a fixing member, an adjustment member, and a circuit board (electric circuit). The substrate and the adjustment member are arranged in this order. Then, by connecting the circuit board to the image pickup element only by electrical connection using the connection terminals, the image pickup element is isolated from the influence of thermal expansion of the circuit board. In addition, the adjustment member is fixed to the back surface of the image sensor via the circuit board, and the adjustment member, the circuit board, and the image sensor are integrated. The integrated adjustment member, circuit board, and image sensor serve as the adjustment member. The fixing member is assembled with the fixing member by screwing and fixing the fixing member by soldering.

  In this configuration, the circuit board and the image sensor are arranged between the fixing member and the adjustment member, and are covered with the adjustment member, so that the impact is absorbed by the adjustment member, and the electrical components such as the circuit board and the image sensor are protected from the impact. Is done.

However, even in the configuration described in Japanese Patent Laid-Open No. 2001-285696, it is considered that the lens mount is attached to the front plate, and the front plate is attached to the camera body. For this reason, when the camera body is deformed, the lens mount is affected by the deformation, and the distance between the lens mount and the image sensor incorporated in the camera body is affected by the deformation of the camera body.
JP 2001-285696 A

  The problem to be solved is that there is no frame structure with sufficient shock absorption function despite high rigidity, and the present invention provides a frame structure for a single-lens reflex camera having high rigidity and excellent shock absorption function. It is an object.

  In the present invention, the front frame, the pair of side frames, and the rear frame are integrated to form a hollow box-shaped frame body, and the mirror box and the image sensor are arranged in the hollow of the frame body.

According to the first aspect of the present invention, the front frame, the first and second side frames, and the rear frame are integrated to form a hollow box-shaped frame body, and the frame body is an integrated box. Because of its shape, it has excellent impact resistance and does not easily deform even when an impact force is applied. Also, since it is a hollow body, it has excellent shock absorption, can absorb shock sufficiently, and has high rigidity and shock absorption. A frame structure that is excellent in function and difficult to deform is obtained.
Since the mirror box and the image sensor are housed in a frame body having high rigidity and excellent shock absorption function, the impact force transmitted to the mirror box and the image sensor is small, and the influence of the impact force can be minimized.
Also, the support plate is fixed to the mirror box, the image sensor is fixed to the support plate, and the lead is loosely fitted and inserted through the support plate, the rear frame, and the first electric board, on the first electric board. It is connected to the flexible second electric substrate and electrically connected to the first electric substrate, and is not directly connected to the first electric substrate. Therefore, the momentary deformation when an impact force is applied to the frame body is absorbed by the flexible second electric substrate connected to the lead of the image sensor, preventing the electric substrate from cracking, solder peeling, etc. Is done.

According to the second aspect of the present invention, the front frame, the first and second side frames, and the rear frame are integrated to form a hollow box-shaped frame body, and the frame body is an integrated box. Because of its shape, it has excellent impact resistance and does not easily deform even when an impact force is applied. Also, since it is a hollow body, it has excellent shock absorption, can absorb shock sufficiently, and has high rigidity and shock absorption. A frame structure that is excellent in function and difficult to deform is obtained.
Since the mirror box and the image sensor are housed in a frame body having high rigidity and excellent shock absorption function, the impact force transmitted to the mirror box and the image sensor is small, and the influence of the impact force can be minimized.
Also, the support plate is fixed to the mirror box, the image sensor is fixed to the support plate, and the lead is loosely fitted and inserted into the support plate, the rear frame, and the electric board, and is connected to the flexible printed board on the electric board. Are electrically connected to the electric board and not directly connected to the electric board. Therefore, instantaneous deformation when an impact force is applied to the frame main body is absorbed by the flexible printed circuit board connected to the lead of the image sensor, and cracking of the electric board, peeling of the solder, and the like are prevented.

  According to the third aspect of the present invention, although the mirror box is fixed to the front frame on the front surface thereof, the positioning pin on the rear surface is skimmed into the insertion hole of the rear frame, and the range of the gap with the insertion hole Therefore, instantaneous deformation when an impact force is applied to the frame main body is suppressed to a certain amount of the gap range, and large deformation is prevented.

  According to the fourth aspect of the present invention, the image pickup device is disposed inside the mirror box within the frame body, and thus is double protected and held in an environment that is not easily affected by the impact force.

  According to the fifth aspect of the present invention, since the first electric board is screwed to the rear frame behind the rear frame, the first electric board can be retrofitted to the integrated frame body, and can be easily attached and detached. Assemblability is improved.

  According to the sixth aspect of the present invention, since the first electric board is also screwed to the side frame, the first electric board is firmly fixed to the frame body and fixed in an environment that is not easily affected by the impact force.

  According to the seventh aspect of the present invention, even if the interchangeable lens is mounted on the body mount and the impact force is transmitted to the front frame via the interchangeable lens, the front frame is composed of the first and second side frames, the rear frame. Since the frame main body is integrated with the frame and has a high rigidity and an excellent shock absorbing function, deformation of the front frame due to impact force is suppressed, and large deformation does not occur in the front frame.

  According to the eighth aspect of the present invention, the lower frame fixed to the front frame, the first and second side frames, and the rear frame constituting the frame main body is disposed on the bottom surface of the frame main body, The rigidity of the frame body is further increased, and a stronger frame body can be obtained.

  According to the ninth aspect of the present invention, since the tripod mounting member is fixed to the lower frame integrated with the frame body, the resistance force to the external force acting on the tripod is large, and the influence of the external force on the frame body is large. It is suppressed.

  According to the tenth aspect of the present invention, since the pair of suspension fittings are fixed to the frame body, the resistance force against the external force acting on the suspension fitting is large, and the influence of the external force on the frame body is suppressed.

According to the eleventh aspect of the present invention, the front frame, the first and second side frames, and the rear frame are integrated to form a hollow box-shaped frame body, and the frame body is an integrated box. Because of its shape, it has excellent impact resistance and does not easily deform even when an impact force is applied. Also, since it is a hollow body, it has excellent shock absorption, can absorb shock sufficiently, and has high rigidity and shock absorption. A frame structure that is excellent in function and difficult to deform is obtained.
Since the mirror box and the image sensor are housed in a frame body having high rigidity and excellent shock absorption function, the impact force transmitted to the mirror box and the image sensor is small, and the influence of the impact force can be minimized.

  According to the present invention of claim 12, since the first electric board is screwed to the rear frame behind the rear frame constituting the frame main body, it can be retrofitted to the integrated frame main body, and its attachment / detachment Is easy and the assemblability is improved.

  According to the thirteenth aspect of the present invention, the lead of the imaging device is inserted by loosely fitting the support plate, the rear frame, and the insertion hole of the first electric board, and the electric board is behind the first electric board. It is connected to the upper flexible second electric board and is electrically connected to the first electric board, and is not directly connected to the first electric board. Therefore, the momentary deformation when an impact force is applied to the frame body is absorbed by the flexible second electric substrate connected to the lead of the image sensor, preventing the electric substrate from cracking, solder peeling, etc. Is done.

  According to the fourteenth aspect of the present invention, since the positioning pin of the mirror box is skimmed in the insertion hole of the rear frame and is free in the range of the gap with the insertion hole, when an impact force is applied to the frame body Instantaneous deformation is limited to a certain amount of the gap range, and large deformation is prevented.

  According to the present invention, a frame structure having a high rigidity and an excellent shock absorbing function is realized by configuring a hollow box-shaped frame body integrated from the front frame, the two side frames, and the rear frame. .

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an exploded perspective view of a left half part and an exploded perspective view of a right half part of a camera (digital single-lens reflex camera) according to an embodiment, and FIGS. 3 and 4 show A and A in FIG. The cross-sectional view of the assembly drawing along -A (however, the side frame described later is not sectioned), and the longitudinal cross-sectional view of the assembly drawing along line BB are shown. FIG. 5 shows a longitudinal sectional view of the frame body extracted from FIG. 3 (however, a side frame described later is not sectioned).

  Generally speaking, as can be understood from the exploded perspective views of FIGS. 1 and 2, the camera 10 includes a front frame 20, a side frame 30, a rear frame 40, and a lower frame 50. The magnesium alloy or aluminum alloy, the side frame are formed of a relatively rigid synthetic resin material such as polycarbonate resin, and the rear frame and the lower frame are both formed of a stainless metal plate or an aluminum plate. The front frame 20, the side frame 30, and the rear frame 40 are fixed and integrated to form a hollow box-shaped skeleton (frame body) 12 that matches the outer shape of the camera 10 from the front frame, the side frame, and the rear frame. (See FIG. 5). Further, a lower frame 50 is fixed to the front frame 20, the side frame 30, and the rear frame 40 from below, and closes the bottom of the frame body 12 to reinforce the frame body. In addition, an image sensor (CCD, solid-state image sensor) 60 is housed in the frame body 12, an electric board 70 is disposed behind the rear frame 40, and a support plate 80 to which the image sensor is bonded and fixed is on the front surface of the rear frame 40. The flexible printed circuit board 90 is located behind the rear frame 40. A series of leads 62 (terminals) of the image sensor 60 are connected to the flexible printed circuit board 90 without the support plate 80, the rear frame 40, and the electric circuit board 70. A mirror box (mirror frame) 100 is housed in the frame body 12 behind the front frame 20. Note that “front” indicates a surface facing the subject side in the optical axis direction of the interchangeable lens (photographing lens), and “back” and “back” indicate opposite directions, that is, surfaces facing away from the subject.

  Hereinafter, each component will be described in detail. First, the front frame 20 will be described. As can be seen from FIGS. 1 and 2, the front frame has a substantially rectangular shape with a central hole, and a ring-shaped body mount 22 is fixed to the subject side on the central hole 21. ing. Also, a number of insertion holes 24 for screws are formed in the front frame 20, and the screws that pass through the two insertion holes 24-1 immediately below the body mount 22 are screw holes in the upper bent piece 52 of the lower frame 50. The lower frame 50 is fixed to the front frame 20 from below by being screwed to 54.

  As described above, not only the front frame 20 is attached to the front surface of the lower frame 50 using the upper bent piece 52, but also the side frame 30 is on the left and right ends of the upper surface of the lower frame, and the rear frame 40 is the lower frame. Are respectively attached to the rear ends of the top surfaces of the plates. That is, a large number of insertion holes 56 are formed in the lower frame 50, the side frames 30 are screwed to the lower frame 50 using the insertion holes 56-1 at the left and right ends, and the insertion holes 56-2 at the rear end are used. The rear frame 40 is screwed to the lower frame. Here, the rear frame 40 has a lower bent piece 42 and is screwed using the lower bent piece 42. Further, in front of the rear frame 40, the tripod attachment member 58 is screwed using the insertion hole 56-3, and the tripod attachment piece 58a on the lower surface of the tripod attachment member is lowered through the large diameter insertion hole 56-4. Is growing. Then, the camera 10 is set on the tripod by screwing a tripod (not shown) attachment screw into a female screw 58a ′ (see FIG. 4) of the tripod attachment piece 58a. The side frame 30 is divided into left and right sides, that is, divided into opposite sides across the mirror box 100, and the left side frame 30L also serves as a battery case. Therefore, the side frame 30L itself is a substantially hollow member.

  The side frame 30 is also fixed to the front frame 20. That is, the side frame 30 is attached to the front frame 20 by screwing screws through the insertion holes 24-2 of the front frame into the screw holes 32 of the left and right side frames 30L and 30R. Here, the lens attaching / detaching operation piece 110 is positioned between the right side frame 30 </ b> R and the front frame 20.

  The lens attaching / detaching piece 110 is formed to have a stepped columnar main body 112, an arm 114 extending laterally from the stepped portion of the main body, and a lock pin 116 at the tip of the arm. The compression coil spring 118 is wound around the small-diameter portion 112a in the latter half of the main body, the small-diameter portion 112a is inserted into the insertion hole 34 of the side frame 30R, and the arm 114 is loosely fitted in the long hole 36 of the side frame 30R. Further, the large-diameter portion 112b in the first half of the main body is inserted through the insertion hole 24-3 of the front frame 20, and the lock pin 116 is inserted through the insertion hole 24-4 formed in the body mount 22 of the front frame 20, thereby compressing the coil spring. It projects under the elasticity of 118. When the lock pin 116 is retracted against the elastic force of the compression coil spring 118 and the interchangeable lens (not shown) is rotated by a predetermined angle to the body mount 22 under a bayonet mount or a screw mount, the replacement is performed. The lock pin protrudes and engages with the positioning hole formed in the lens, and the interchangeable lens is locked at the mounting position. When the interchangeable lens is locked, the large-diameter portion 112b of the main body also protrudes from the insertion hole 24-3 of the front frame 20 in conjunction with the protrusion of the lock pin 116. When the large-diameter portion 112b of the main body is pushed in, the lock pin 116 is detached from the positioning hole of the interchangeable lens, the interchangeable lens is unlocked, and the interchangeable lens can be detached from the body mount 22. As described above, the large-diameter portion 112b of the main body functions as a push button for removing the lens.

  As can be seen from FIG. 3 in addition to FIGS. 1 and 2, a rear frame 40 is fixed to the back surface of the side frames 30 (30L, 30R). That is, the rear frame 40 is screwed to the side frame 30 using the insertion holes 44-1 among the many insertion holes 44 formed in the rear frame 40. In this way, the front frame 20, the side frame 30, and the rear frame 40 are sequentially fixed, so that these three members are integrated into a hollow box that matches the outer shape of the camera 10 as shown in FIG. A frame body 12 having a shape is formed. Since the left side frame 30L is formed thinner than the right side frame 30R, the extension rod 38-1 extends rearward from the back surface of the side frame 30L so as to compensate for the lack of thickness. A screw is screwed into the screw hole at the tip of -1. The long extension rod 38-2 extending in parallel with the extension rod 38-1 is used to fix the electric board 70 behind the rear frame 40 to the side frame 30L. Further, a screw inserted through the insertion hole 44-7 is screwed into a screw hole (not shown) at the rear end of the extension rod 46 fitted to the tip of the blind hole 106-2 of the flange 104 of the mirror box. The rear frame 40 is also attached to the mirror box 100.

  The hollow box-shaped frame body 12 functions as a skeleton of the camera 10, and is arranged so that the imaging device 60 and the mirror box 100 are surrounded by the frame body 12. As can be seen from FIGS. 1, 2, and 4, the mirror box 100 is formed in a box shape opened at the front surface, the back surface, and the top surface, has a reflection mirror 102 that can be flipped up, and a screen 103 is formed at the top surface opening. It has a circular flange 104 on its front surface, and a number of screw holes 106-1 are formed on the front surface of the flange. The mirror box 100 is attached to the back surface of the front frame 20 behind the body mount 22 by screwing screws through the insertion holes 24-5 of the front frame 20 into the screw holes 106-1 of the flange 104. ing. Further, the support plate 80 is attached to the mirror box by being screwed into a screw hole (not shown) on the back surface of the mirror box 100 with a screw inserted into the insertion hole 82-2. A screw inserted into the insertion hole 82-2 of the support plate 80 through the escape hole 72-4 of the electric board 70 and the escape hole 44-3 of the rear frame 40 is a screw hole (not shown) on the back surface of the mirror box 100. It can be confirmed that they are screwed together.

  Positioning pins 108 as stoppers are formed in the lower right and upper left (as viewed from the front) of the rear surface of the mirror box 100 and are inserted into the insertion holes 82-1 of the support plate 80 and the insertion holes 44-2 of the rear frame 40. . As can be seen from FIG. 4, the positioning pin 108 is inserted into the positioning hole 44-2 of the rear frame 40 leaving a sufficient gap, and the mirror box is directly fixed to the rear frame 40. It has not been. The positioning pin 108 and the positioning hole 44-2 of the rear frame 40 are fitted to each other in terms of the diameter dimension error of the positioning pin 108 of the mirror box 100, the position dimension error of the mirror box, and the hole diameter of the positioning hole 44-2 of the rear frame 40. Even in consideration of the dimensional error and the positional dimensional error of the positioning hole 44-2 in the rear frame, the gap is set between the positioning pin and the positioning hole. For example, if the diameter tolerance of the positioning pin 108 is ± 0.05 mm, its positional dimension tolerance is ± 0.1 mm, the positioning hole diameter tolerance is ± 0.05 mm, and the positioning hole position tolerance is ± 0.1 mm, it is simply positioned. If the design dimension (nominal dimension) of the pin or the positioning hole is +0.5 mm with respect to the other, a sufficient gap can be taken. If the frame body 12 is greatly deformed, this one-side gap clearance 0.25 mm (= 0.5 / 2) is clogged, and deformation can be prevented further, and large deformation is prevented.

  As shown in FIG. 4, the image sensor 60 is disposed in the rear opening of the mirror box 100, is adhered and fixed to the front surface of the support plate 80, and is disposed so as to be surrounded by the frame body 12. The imaging element 60 has a pair of plural leads (terminals) 62 extending in the optical axis direction above and below, and is electrically connected to the rear frame 70 on the opposite side to the front frame 20. That is, the lead 62 of the image sensor 60 is loosely fitted into the long hole (escape hole) 82 of the support plate 80, the circular escape hole 44-4 of the rear frame 40, and the long hole (escape hole) 72-1 of the electric board 70. The image pickup device 60 and the electric substrate are electrically connected to each other by the pair of flexible printed circuit boards 90, which are inserted and connected to the flexible printed circuit board 90 on the electric substrate behind the electric substrate. Note that each of the pair of flexible printed circuit boards 90 has a plurality of insertion holes having conductive patterns around the leads 62 of the image pickup device 60 and can be electrically connected to the conductive patterns. A plurality of connection patterns connected to the upper connection pattern are formed. Of course, the support plate 80 in which the lead 62 of the image sensor is loosely fitted, the rear frame 40, and the play holes 82-3, 44-4, and 72-1 of the electric board 70 are not mechanically contacted with the lead 62. It is formed in a sufficient size.

  The board mounting seat 120 is positioned between the rear frame 40 and the electric board 70, passes through the insertion hole 72-2 of the electric board 70 and the insertion hole 120-1 of the board mounting seat, and the screw is the screw hole 44 of the rear frame 40. By being screwed to −5, the electric board 70 is fixed behind the rear frame 40 by being separated by an amount corresponding to the board thickness of the board mounting seat 120. The electric board 70 has a female connector 74 in the lower part, and the male connector 132 on the lower electric board 130 is connected to the female connector 74 and is inserted through the insertion holes 134-1 and 134-2 of the lower electric board. The lower electric board 130 is attached to the electric board 70 from below by screwing the screw into a screw hole (not shown) of the side frame 30L and a screw hole (not shown) of the lower surface of the side frame 30R. . The screw inserted through the insertion hole 72-3 of the electric board 70 is screwed into a screw hole (not shown) of the extension rod 38-2 on the back surface of the side frame 30L, whereby the electric board 70 is attached to the rear frame 40. In addition, it is fixed to the side frame 30L. Here, the insertion hole 72-4 of the electric board 70 shows an escape hole.

  Further, a pair of hanging metal fittings 140 for straps are fixed to the frame body 12. In other words, the screw that is inserted through the insertion hole 24-6 of the front frame 20 and the insertion hole 44-6 of the rear frame is screwed into the screw hole 142-1 of the suspension fitting 140R, so that a substantially U-shaped suspension. A metal fitting 140R is attached to and erected on the front frame 20 and the rear frame 40. In addition, the screw through the insertion hole 142-2 of the hanging bracket 140L is screwed into the screw hole (not shown) of the left side frame 30L, so that the flat hanging bracket 140L is attached to the side frame 30L. ing. As described above, the suspension fitting 140 is fixed to the side frame 30 or the front frame 20 and the rear frame 40 constituting the frame body 12.

  As described above, the front frame 20 is fixed to the side frame 30 (30L, 30R), the side frame is fixed to the rear frame 40, and the front frame 20, the side frame 30, and the rear frame 40 are integrated into the outer shape of the camera 10. A combined box-shaped frame body 12 is formed. Since the frame main body 12 has an integrated box shape, it has excellent impact resistance and does not easily deform even when an impact force is applied. In addition, since the hollow body has a space between the front and rear frames 20 and 40 by two side frames separated on the right and left sides, the shock absorption is excellent and the shock can be sufficiently absorbed. Thus, by integrating the front frame 20, the side frame 30, and the rear frame 40, it is possible to obtain a frame structure that is highly rigid and excellent in shock absorbing function and is not easily deformed.

Although the mirror box 100 is fixed to the front frame 20, the back surface thereof is free in the range of the gap between the positioning pin 108 and the rear frame 44-2. The support plate 80 is fixed to the mirror box 100, the imaging device 60 is fixed to the support plate 80, and the lead 62 passes through the escape holes of the support plate 80, the rear frame 40, and the electric board 70, and the electric board 70 is fixed. The image sensor 60 and the electric board are electrically connected to each other by being connected to the upper flexible printed circuit board 90, and the image sensor is not directly connected to the electric board 70. Therefore, an instantaneous deformation of the frame body 12 when an impact force is applied to the frame body 12 is absorbed by the flexible printed circuit board 90 connected to the leads 62 of the image sensor 60, and the electric board is cracked, the solder is peeled off, etc. Is prevented. Further, due to the presence of the gap between the positioning pin 108 and the rear frame 44-2, the deformation is suppressed to a certain amount, ie, the range of the gap, and no large deformation occurs.
As described above, the frame structure of the present invention is not only difficult to deform with high rigidity and excellent shock absorbing function, but also has a configuration that absorbs instantaneous deformation at the time of impact and suppresses deformation. Therefore, the influence of the impact on the internal optical system such as the reflection mirror 102, the screen 103, and the image sensor 80 of the mirror box 100 disposed so as to be surrounded by the frame body 12 can be minimized. Further, as described above, the front frame 20 includes the body mount 22, and the mirror box 100 that holds the image sensor 60 is fixed to the front frame 20. Dimensional stability of the distance to the screen 103 via the box reflecting mirror 102, and the distance from the body mount 22 to the imaging surface of the image sensor 60, that is, the flange back does not change, and the dimension is stably secured. Will do.

  As can be seen from FIG. 1 to FIG. 3, the electric board 70 is screwed to the rear frame behind the rear frame 40 constituting the frame body 12 via the board mounting seat 120, and uses the extension rod 38-2. It is attached to the left side frame 38-2. The lower electric board 130 is attached to the electric board 70 by connecting and screwing male and female connectors 132 and 74, and is screwed to the side frames 30 (30R and 30L). Therefore, electrical components such as the electric board 70 and the lower electric board 130 can be retrofitted to the frame main body 12 and can be easily attached and detached, thereby improving the assemblability.

  The lower frame 50 is screwed to the front frame 20, the side frame 30, and the rear frame 40 constituting the frame body 12 to fix the lower frame to the bottom surface of the frame body. Is obtained.

Other frames such as the front frame 20 and the rear frame 40 are formed in a plate shape, whereas the side frames 30 (30L, 30R) are formed in a box-shaped structure. And the tripod attachment member 58 is attached to the lower frame 50 fixed to the side frame 30, and one (140L) of a pair of hanging metal fittings 140 is directly fixed to the side frame 30 (30L). The other hanging bracket 140 (140R) is directly fixed to the front frame 20 and the rear frame 40.
As described above, the tripod mounting member 58 and the hanging metal fitting 140 that directly receive external force are fixed to the frame body 12. Therefore, the resistance force to the external force acting on the tripod mounting member 58 and the hanging bracket 140 is large, and the influence of the external force on the frame main body 12 via the tripod and the hanging bracket is unlikely to affect the mirror box 100. The image sensor 60, the reflection mirror 102, and the screen 103 thus protected are protected.

  As described above, the camera 10 includes the fixing member (the front frame 20) including the body mount 22, the mirror box 100 integrally fixed to the fixing member, and the image sensor 60 held by the mirror box. The body mount side of the mirror box is fixed to a fixing member (front frame 20), and the side of the mirror box that holds the image sensor 60 is in a free end state. That is, the mirror box 100 is held in a cantilever state by the fixing member (the front frame 20), and the image sensor 60 is held at the free end of the cantilever. Therefore, even if a large force is applied to the front frame 20 and deformation occurs, the optical dimensional stability is superior to the conventional one. In the embodiment, the front frame 20 and the mirror box 100 are separate members and are fixed and integrated, but the front frame and the mirror box may be integrally formed from one member.

    Note that the front frame 20 and the mirror box 100 integrated with each other, or the mirror box 100 attached to the frame body 12 may be referred to as a “front plate” which is a member of a conventional single-lens reflex camera structure. .

  The above-described embodiments are for explaining the present invention, and the present invention is not limited to the embodiments, and it can be modified and applied without departing from the gist of the present invention. Not too long.

  INDUSTRIAL APPLICABILITY According to the present invention, the present invention can be widely applied to the field of optical equipment that is easily affected by impact force.

It is a figure which shows the left half part of the exploded perspective view of the camera (single-lens reflex camera) which concerns on one Example of this invention. It is a figure which shows the right half part of the exploded perspective view of the camera (single-lens reflex camera) which concerns on one Example of this invention. FIG. 3 is a longitudinal sectional view of the assembly view of the camera along line AA in FIGS. 1 and 2. FIG. 3 is a longitudinal sectional view of the assembly view of the camera along the line BB in FIGS. 1 and 2. It is the longitudinal cross-sectional view which extracted the frame main body from FIG.

Explanation of symbols

10 Camera (SLR camera)
DESCRIPTION OF SYMBOLS 12 Frame main body 20 Front frame 30 (30L, 30R) Side frame 40 Rear frame 50 Lower frame 58 Tripod attachment member 60 Image sensor 62 Image sensor lead 70 Electric substrate 80 Support plate 90 Flexible printed circuit board 100 Mirror box (mirror frame)
110 Lens attachment / detachment operation piece 120 Board mounting seat 130 Lower electrical board 140 Suspension bracket

Claims (14)

The front frame,
A mirror box fixed to the back of the front frame;
An image sensor with a lead is supported on the front surface and fixed to the rear surface of the mirror box, and the lead of the image sensor is loosely fitted, and a support plate through which is inserted,
First and second side frames respectively fixed to the back surface of the front frame across the mirror box;
A hollow box-shaped frame body that is fixed to the back surfaces of the first and second side frames and is integrated with the front frame and the first and second side frames, and houses the imaging device and the mirror box. Configured with the front frame and the first and second side frames, and the rear frame in which the leads of the image sensor are loosely fitted and inserted, and
A first electric board that is fixed to the rear frame behind the rear frame and through which the leads of the image sensor are loosely fitted and inserted;
The support plate, the rear frame, and the first electric board are loosely fitted and connected to the lead of the image pickup element behind the electric board to electrically connect the image pickup element and the electric board. A frame structure of a single-lens reflex camera having a flexible second electric substrate. The front frame,
A mirror box fixed to the back of the front frame;
A support plate that supports the imaging device with leads on the front surface and is fixed to the back surface of the mirror box, and the leads of the imaging device are loosely fitted and inserted;
First and second side frames respectively fixed to the back surface of the front frame across the mirror box;
A hollow box-shaped frame body that is fixed to the back surfaces of the first and second side frames and is integrated with the front frame and the first and second side frames, and houses the imaging device and the mirror box. Configured with the front frame and the first and second side frames, and the rear frame in which the leads of the image sensor are loosely fitted and inserted, and
An electric board fixed to the rear frame behind the rear frame, and in which the leads of the image sensor are loosely fitted and inserted;
The support plate, the rear frame, and the first electric board are loosely fitted and connected to the lead of the image pickup element behind the electric board to electrically connect the image pickup element and the electric board. Flexible printed circuit board,
A frame structure of a single-lens reflex camera. The mirror box is formed with a positioning pin on a back surface thereof, and the positioning pin is inserted through the insertion hole of the support plate and is skimmed into the insertion hole of the rear frame. The frame structure of the single-lens reflex camera of 2. The frame structure of a single-lens reflex camera according to claim 1, wherein the image sensor is disposed in a rear opening of the mirror box and is located in the mirror box. The frame structure of a single-lens reflex camera according to claim 1, wherein the first electric board is screwed to a back surface of the rear frame. 6. The frame structure of a single-lens reflex camera according to claim 5, wherein the first electric board is screwed to at least one of the first and second side frames. 4. The frame structure of a camera according to claim 1, wherein the front frame has a body mount to which an interchangeable lens can be attached and detached on a front surface thereof. The lower frame fixed to each of the front frame, the first and second side frames, and the rear frame constituting the frame body is disposed on the bottom surface of the frame body. The frame structure of the single-lens reflex camera of 7. 9. The frame structure of a single-lens reflex camera according to claim 8, wherein a tripod mounting member is fixed to the lower frame. 10. The frame structure of a single-lens reflex camera according to claim 8, wherein the pair of suspension brackets are fixed to the side of the frame body. A frame structure of a single-lens reflex camera in which a front frame, two side frames, and a rear frame are integrated to form a hollow box-shaped frame body, and a mirror box and an image sensor are arranged on the frame body. The frame structure of the single-lens reflex camera according to claim 11, wherein a first electric board is fixed to a rear surface of the rear frame via a board mounting seat. The image sensor is fixed to the front surface of the support plate interposed between the mirror box and the rear frame, and is disposed in the rear opening of the mirror box,
Leads of the image sensor are loosely fitted and inserted through the support plate, the rear frame, and the escape holes of the first electric board, respectively, and the lead on the first electric board is allowed behind the first electric board. The single-lens reflex camera frame structure according to claim 12, wherein the imaging device and the first electric board are electrically connected to each other by being connected to a flexible second electric board. The mirror box is formed with a positioning pin on the back surface thereof,
14. The frame structure of a single-lens reflex camera according to claim 12, wherein the positioning pin of the mirror box is inserted through the insertion hole of the support plate and is skimmed into the insertion hole of the rear frame.

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