Frame-type full-modular medium-and-large-format photographing system

Abstract

The utility model provides a frame-type full-modular medium-and-large-format photographing system. The frame-type full-modular medium-and-large-format photographing system comprises a plurality of detachable frame pieces which are encircled to form a frame structure; and a plurality of matching holes are respectively formed in each surface of the frame piece. According to the utility model, the structural design is reasonable, the split assembly type frame structure is adopted, the frames with different sizes can be assembled according to the size requirement, the photographing requirements of films with different picture sizes can be conveniently met, and the use cost and the input cost of equipment are effectively saved. And meanwhile, the frame structure can be assembled with corresponding parts according to the use requirements of later-stage equipment, so that the frame structure can be used by various photographic equipment, and the application range of the photographic system is further expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of photographic equipment, in particular to a frame-type fully modular medium and large format photographic system. Background Art

[0002] In film photography, large-format cameras and some technical medium-format cameras mainly have three components: the front group, the middle part and the rear group. The front group is used to assemble the lens, and the rear group is used to assemble the viewfinder and the focusing plate. The middle part is usually a flexible bellows or a rigid hollow cone, and the front group and the rear group are connected through the middle part. At the same time, according to the requirements of some shooting, a track can be designed under the middle part to drive the bellows to move and adjust the relative position between the front group lens and the rear group. In the middle part, the photographic connection system for assembling the front group and the rear group components is designed according to the image size required by the rear group.

[0003] In photography, especially film photography, different connection photography systems need to be equipped according to different sizes of different frames. For example, medium format has multiple frame sizes such as 6*6, 6*12, 6*17, 6*16, 6*24 (in centimeters), and large format has multiple frame sizes such as 4*5, 5*7, 4*10, 8*10 (in inches). In conventional photography, different sizes of photography connection systems need to be set up in correspondence with the frame sizes.

[0004] At the same time, due to the particularity of film photography, film shooting, film reading and projection are also equipped with a variety of photographic equipment such as non-folding instant cameras, portable folding leather cameras, folding dual-track cameras, non-folding dual-track cameras, single-track cameras, projectors, enlargers, etc. At present, among these different photographic equipment, it is also necessary to continue to use the corresponding connection systems of different equipment according to the equipment models on the basis of corresponding to the frame size.

[0005] Such a system configuration requires different frame sizes and input and output equipment to be used for conversion, and requires a variety of photographic connection systems to be equipped. When faced with multiple frames and multiple uses, the equipment investment cost is huge. Utility Model Content

[0006] The technical problem to be solved by the utility model is: in order to overcome the shortcomings of the existing technology, the utility model provides a frame-type fully modular medium and large format photography system, which adopts a frame-type assembly structure and can be assembled on demand according to the use requirements of the frame size. The same set of parts can be combined to form frames of different frame sizes and can be suitable for use with a variety of photographic equipment, effectively reducing the investment in equipment for different frames.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a frame-type fully modular medium and large format photography system, which is used to connect a front group and a rear group. The photography system includes a plurality of frame members that are combined to form a frame structure, wherein the frame structure after being combined has a first working surface, and the first working surface of the frame structure is opposite to the second working surface. The outer peripheral surface of the frame after the frame structure is combined is the outer side surface, and the inner peripheral surface of the frame is the inner side surface, and the adjacent two frame members are detachably connected; the first working surface is provided with a first socket for plugging and mating with the front group; the second working surface is provided with a second socket for plugging and mating with the rear group; and a plurality of mating holes are respectively opened on each surface of the frame member.

[0008] In the above scheme, in view of the problem that different frames in the existing photographic system need to be equipped with corresponding sizes, a split assembly frame structure is designed. The frame structure is assembled by detachable frame parts. Frame parts of multiple sizes can be designed according to size requirements, and assembled to form a photographic system of corresponding frame sizes as needed. Frame parts of the same size can be used to combine to form frames of different frame sizes. For example, a frame part with a length of 4 inches can be combined with a frame part of 5 inches to form a photographic system for a frame size of 4*5 (inches), and can also be combined with a frame part of 10 inches to form a photographic system for a frame size of 4*10 (inches). A frame part with a length of 5 inches can be combined with a frame part of 6 centimeters in metric size to form a photographic system for a frame size of 6*12 (centimeter). That is, the conversion of the frame size is realized. In the face of multiple frame size requirements, the corresponding frame size can be combined as needed to further reduce the investment cost in multiple frames. After the frame structure is combined, the front group and the rear group are assembled together through the socket to adapt to different functional form conversions.

[0009] Furthermore, a plurality of frame members are combined to form a frame structure with rectangular working surfaces on both sides; in a group of frame members that are combined to form the frame structure, the frame member has a first clamping surface, the first clamping surface is opposite to a second clamping surface, and the outer side surface and inner side surface of the frame member are consistent with the outer side surface and inner side surface of the frame structure; the matching holes are provided on the first clamping surface, the second clamping surface and the outer side surface of the frame member; two adjacent frame members are connected and locked by through-hole locking nuts, and the two ends of the outer side surface of each frame member are symmetrically provided with connecting and mounting holes; the outer side surface of each frame has a center line, and any point on the center line has the same vertical distance from the corresponding side clamping surface, and the connecting and mounting holes are offset relative to the center line. By designing the connecting and mounting holes offset from the center line on each frame member, after the frame assembly is assembled, as long as the clamping surfaces of the two adjacent frame members are in opposite directions, a high and low staggered distribution will inevitably be formed in the thickness direction of the two frame members, thereby forming a first buckle and a second socket for the front group and the rear group to be plugged and matched. With such a structure, frame members of the same structure can be used to form a frame structure with a socket, without the need to design frame members of different thicknesses to form a socket drop, thereby further expanding the application range of the frame member combination and reducing the investment cost of the equipment.

[0010] Furthermore, in a group of frame members that enclose a rectangular frame structure, the connecting end surface between two adjacent frame members is a 45° inclined surface relative to the outer side surface and the inner side surface thereof, and the inner side position corresponding to the inclined surface is concave with an inclined groove surface arranged parallel to the inclined surface, and the connecting and mounting hole is arranged perpendicular to the inclined surface, and the connecting and mounting hole is arranged through the inclined surface and the corresponding inclined groove surface. In this way, no matter what the direction of the first clamping surface and the second clamping surface is, the two adjacent frame members can be spliced ​​under the guidance of the 45° inclined surface and assembled with the lock nut through the through hole.

[0011] Furthermore, the frame structure includes four frame members; slots are provided on the first and second card-joint surfaces of the frame members. When the frame members are combined to form the frame structure, the slots corresponding to the first working surface are connected to form a first positioning slot, and the slots corresponding to the second working surface are connected to form a second positioning slot. After the front group is matched with the first socket, it is secondary positioned and closed to block light through the first positioning slot. After the rear group is matched with the second socket, it is secondary positioned and closed to block light through the second positioning slot. By setting the positioning slot, after the socket is matched with the front group or the rear group for assembly, secondary positioning can be provided for the photographic system, further ensuring the accuracy of positioning. At the same time, the cooperation of the positioning slot also provides a certain degree of light blocking and sealing for the connection between the frame structure and the front group and the rear group at the socket position, providing an imaging environment for photography.

[0012] Specifically, a group of frame members that are combined to form a rectangular frame structure include a first frame member, a second frame member, a third frame member and a fourth frame member that are connected end to end in sequence, wherein the first clamping surfaces of the first, second and third frame members are located on the same plane, and the plane and the second clamping surface of the fourth frame member constitute a first working surface; one end of the fourth frame member is connected to the first frame member, and the other end is connected to the third frame member, and the first clamping surface of the fourth frame member is set in the opposite direction to the first clamping surface of the second frame member, and the plane where the second clamping surfaces of the first, second and third frame members are located and the first clamping surface of the fourth frame member constitute a second working surface.

[0013] After the frame members are enclosed to form a rectangular frame structure through the through-hole locking nuts and the connecting mounting holes, the second clamping surface of the fourth frame member is protruding relative to the first clamping surfaces of the first, second and third frame members, and the inner side surface of the fourth frame member and the first clamping surfaces of the first, second and third frame members form a first socket for the front group to be inserted into and cooperate with, and the inner side surface of the fourth frame member provides a limit for the insertion of the front group; the first clamping surface of the fourth frame member is protruding relative to the first clamping surfaces of the first, second and third frame members, and the inner side surface of the fourth frame member and the first clamping surfaces of the first, second and third frame members form a second socket for the rear group to be inserted into and cooperate with, and the inner side surfaces of the first, second and third frame members provide a limit for the insertion of the rear group.

[0014] Specifically, a group of frame members enclosed to form a rectangular frame structure includes a first frame member, a second frame member, a third frame member and a fourth frame member connected end to end in sequence; the first clamping surface of the first frame member and the third frame member, and the second clamping surface of the second frame member and the fourth frame member constitute a first working surface; the first clamping surface of the second frame member and the fourth frame member is set in reverse direction relative to the first clamping surface of the first frame member and the third frame member, and the first clamping surface of the second frame member and the fourth frame member, and the second clamping surface of the first frame member and the third frame member constitute a second working surface. Compared with the above-mentioned structure in which only the fourth frame member is set in reverse and forms a blocking positioning structure, this combination mode has the same direction of the clamping surfaces of the frame members that are opposite to each other in the four frame members, so that another unobstructed design can be formed during the connection process. That is, when inserting the front group or the rear group, the two sides of the insertion direction are limited by the corresponding frame parts, and there is no obstruction in the insertion direction, which makes it easy to insert the front group or the rear group from the unobstructed sides respectively, and facilitates further downward compatibility. On the basis of not affecting the existing combination functions, the scope of application is expanded, for example, it can be compatible with wide-format cameras with a frame of 6*12 (cm).

[0015] Preferably, the inner side surface of the frame member is concave with a plurality of weight-reducing countersunk holes. The design of the weight-reducing countersunk holes can effectively reduce the weight of the photographic system and achieve lightweight.

[0016] The beneficial effect of the utility model is that the utility model provides a frame-type full-module medium and large-format photography system with a reasonable structural design and a split assembly frame structure. Frames of different sizes can be assembled on demand according to size requirements, which is convenient for film photography needs of different frame sizes, and effectively saves the use cost and equipment investment cost. At the same time, the frame structure can also be assembled with corresponding parts according to the use requirements of later equipment, and can be used for a variety of photographic equipment such as non-folding instant cameras, portable folding leather cameras, folding dual-track cameras, non-folding dual-track cameras, single-track cameras, projectors, enlargers, etc., further expanding the scope of application of the photography system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0019] Figure 2 It is a three-dimensional diagram of the first embodiment of the utility model.

[0020] Figure 3 It is a three-dimensional diagram of the frame member in the first embodiment of the present utility model.

[0021] Figure 4 It is a stereogram of the second embodiment of the present utility model.

[0022] Figure 5 It is a stereogram when the utility model is applied to the hyperfocal distance quick shooting mode.

[0023] Figure 6 It is a side view of the utility model when it is applied in the hyperfocal distance quick shooting mode.

[0024] Figure 7 It is a stereogram when the utility model is applied to the focus ring quick-shot mode.

[0025] Figure 8 It is a side view of the utility model when it is applied to the focus ring quick-shooting mode.

[0026] Fig. 9 It is a stereoscopic diagram of the utility model when it is applied in the portable bellows mode.

[0027] Fig.10 It is a side view of the utility model when it is applied in the portable bellows mode.

[0028] Fig.11 It is a stereogram of the utility model when it is applied in the dual-track mode.

[0029] Fig.12 It is a side view of the utility model when it is applied in the double-track mode.

[0030] In the figure, 1, the first clamping surface 2, the inner side surface of the frame member 3, the slot 4, the weight-reducing countersunk hole 5, the matching hole 6, the second clamping surface 7, the connecting and mounting hole 8, the outer side surface of the frame member 9, the inclined surface 10, the first frame member 11, the second frame member 12, the third frame member 13, the fourth frame member 14, the frame structure 15, the lens board 16, the lens 17, the pig mouth 18, the leather cavity 19, the front group metal frame 20, the focusing screen and the clip 21, the focusing ring 22, the dual-track module 23, and the inclined groove surface. DETAILED DESCRIPTION

[0031] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0032] Embodiment 1:

[0033] like Figure 1 , Figure 2 and Figure 3 The frame-type fully modular medium and large format photography system shown is the first embodiment of the present utility model.

[0034] The photographic system comprises four frame members, which together form a frame structure 14 with a rectangular working surface for connecting the front group and the rear group.

[0035] In actual design, manufacturing and allocation, the structural design of the frame members is consistent, and the length direction of the frame members is set according to the picture size, and different groups of frame structures 14 have different lengths. Generally, according to the size of medium and large formats, the length of the frame members can be designed to be 6 cm, 12 cm, 17 cm, 16 cm, 24 cm, 4 inches, 5 inches, 7 inches, 8 inches and 10 inches, etc., and four frame members of the same size or two frame members of each of the two sizes are selected as needed to form a frame structure 14 of the corresponding picture size. In this way, frame members of the same size can be used to combine to form frames of different frame sizes. For example, a frame member with a length of 4 inches can be combined with a frame member of 5 inches to form a photographic system for a frame size of 4*5 (inches), or combined with a frame member of 10 inches to form a photographic system for a frame size of 4*10 (inches). A frame member with a length of 5 inches can be combined with a frame member of 6 centimeters according to metric dimensions to form a photographic system for a frame size of 6*12 (cm). This realizes the conversion of frame sizes. When faced with requirements for a variety of frame sizes, they can be combined as needed to form corresponding frame sizes, thereby further reducing the investment cost in a variety of frame sizes.

[0036] Specifically, in terms of structure, a group of frame members that enclose a rectangular frame structure 14 include a first frame member 10, a second frame member 11, a third frame member 12, and a fourth frame member 13, each of which has a first clamping surface 1, and the first clamping surface 1 is opposite to the second clamping surface 6. The outer side surface of the frame member corresponds to the outer side surface of the frame structure 14, and the inner side surface of the frame member corresponds to the inner side surface of the frame structure 14.

[0037] The first, second and third frame members 10, 11, 12 are connected in sequence and the first clamping surfaces 1 of the frame members are located on the same plane, which is the first working plane. One end of the fourth frame member 13 is connected to the first frame member 10 and the other end is connected to the third frame member 12. The first clamping surface 1 of the fourth frame member 13 is reversely arranged relative to the first clamping surface 1 of the second frame member 11.

[0038] In a group of frame members that enclose a rectangular frame structure 14, two adjacent frame members are connected and locked by through-hole locking nuts, and the two ends of the outer side surface of each frame member are symmetrically provided with connecting and mounting holes 7. The connecting end surface between two adjacent frame members is a 45° inclined surface 9 relative to its outer side surface and inner side surface. The inner side position of the frame member corresponding to the inclined surface 9 is concave and has an inclined groove surface 23 arranged parallel to the inclined surface 9. The connecting and mounting hole 7 is arranged perpendicular to the inclined surface 9, and the connecting and mounting hole 7 is arranged through the inclined surface 9 and the corresponding inclined groove surface 23. Regardless of whether the first clamping surface 1 and the second clamping surface 6 of the two adjacent frames are in the same direction or in the opposite direction when they are combined, they can be assembled and fixed by the through-hole locking nuts under the guidance of the 45° inclined surface 9.

[0039] In this embodiment, in order to ensure that the frame members can effectively enclose and form the frame structure 14 in both forward and reverse directions, and effectively form a staggered thickness in the thickness direction for the plug-in fit of the front group and the rear group, the connection and installation holes 7 need to be designed to be relatively offset from the center line. That is, each frame has a center line on its outer side, and any point on the center line has the same vertical distance from the corresponding side clamping surface. The connection and installation holes 7 are offset from the center line.

[0040] like Figure 2 As shown, after the through-hole locking nut and the connecting mounting hole 7 enclose the frame members to form a rectangular frame structure 14, the second clamping surface 6 of the fourth frame member 13 is convexly arranged relative to the first clamping surfaces 1 of the first, second and third frame members 10, 11, 12, and the inner side surface of the fourth frame member 13 and the first clamping surfaces 1 of the first, second and third frame members 10, 11, 12 form a first socket for the front group to be inserted and matched. The first clamping surface 1 of the fourth frame member 13 is convexly arranged relative to the first clamping surfaces 1 of the first, second and third frame members 10, 11, 12, and the inner side surface of the fourth frame member 13 and the first clamping surfaces 1 of the first, second and third frame members 10, 11, 12 form a second socket for the rear group to be inserted and matched.

[0041] Among the four frame members of a frame structure 14, the fourth frame member 13 is set in the opposite direction relative to the other three frame members, and a connection and mounting hole 7 is designed to be set on each frame member, which is offset from the center line. After the four frame members are combined, on the first working surface and the second working surface, the fourth frame member 13 and the other three frame members must form a staggered distribution in the thickness direction, thereby forming a first buckle and a second socket for the front group and the rear group to plug and match. With such a structure, there is no need to design a fourth frame member 13 with a different thickness from the first, second, and third frame members 12 in order to form a socket drop. Four frame members of the same structure can be directly combined to form a frame structure 14 with a socket, further reducing the investment in equipment. At the same time, for non-1:1 ratio frames, two sizes of frame bodies can be selected according to size, and two frame bodies are selected for each size. The frame bodies of the two sizes are connected end to end at intervals to form a new size of the frame.

[0042] In actual design, since the positioning requirements of photographic equipment in combination have precision requirements, and at the same time, in the combination, it is necessary to consider the interference and influence that light may cause to imaging, further improvement design is needed on the assembly surface, that is, the working surface of the embodiment, that is, slots 3 are opened on the first clamping surface 1 and the second clamping surface 6. The slot 3 is preferably designed as an inverted right-angled trapezoidal slot structure, and the slot wall close to the inner side of the frame member is a non-right-angled side waist of the right-angled trapezoid, and the slot wall close to the outer side of the frame member is a right-angled side waist of the right-angled trapezoid. When the frame members are surrounded to form a frame structure 14, the slots 3 on the corresponding first working surface are connected to form a first positioning groove, and the slots 3 on the corresponding second working surface are connected to form a second positioning groove. After the front group is matched with the first socket, it is secondary positioned and closed for shading through the first positioning groove, and after the rear group is matched with the second socket, it is secondary positioned and closed for shading through the second positioning groove.

[0043] The design of the positioning groove formed by the combination of the slots 3 can provide secondary positioning for the photographic system when the socket is assembled with the front group or the rear group. The non-right-angle side waist provides guidance for the insertion of the front group or the rear group, and the right-angle side waist provides a blocking limit for the inserted front group or the rear group to ensure the accuracy of positioning. At the same time, the cooperation of the positioning groove also provides a secondary closure for the connection between the frame structure 14 at the socket position and the front group and the rear group, forming a maze design at the slot 3, providing a certain light-shielding and airtight effect for photography, and providing an imaging environment for photography.

[0044] On this basis, if Figure 3 As shown, the inner side surface of the frame member is concave with a plurality of weight-reducing countersunk holes 4. The design of the weight-reducing countersunk holes 4 can effectively reduce the weight of the photographic system and achieve lightweight.

[0045] At the same time, in order to realize the conversion of the functional form of the photographic system, a plurality of matching holes 5 are respectively provided on the first clamping surface 1, the second clamping surface 6 and the outer surface of the frame member for connecting the frame member with corresponding equipment components such as the front group and the rear group.

[0046] In actual practical use, it is not limited to using four frame members to enclose, but according to size requirements and corresponding to the use requirements of the rectangular work surface, one side of the rectangular side can be composed of a combination of frame members of different lengths to form a corresponding side, thereby further expanding the applicable frame size of the photographic system.

[0047] Embodiment 2:

[0048] like Figure 3 and Figure 4 The frame-type fully modular medium and large format photography system shown is the second embodiment of the utility model.

[0049] The second embodiment also uses four frame members to enclose a rectangular frame structure, and its general structure is similar to that of the first embodiment. Different from the first embodiment, in the second embodiment, the directions of the clamping surfaces of the first frame member 10, the second frame member 11, the third frame member 12 and the fourth frame member 13 are different in the process of enclosing and forming the frame structure.

[0050] Specifically, a group of frame members that enclose a rectangular frame structure include a first frame member 10, a second frame member 11, a third frame member 12 and a fourth frame member 13 that are connected end to end in sequence; the first clamping surface 1 of the first frame member 10 and the third frame member 12, and the second clamping surface 6 of the second frame member 11 and the fourth frame member 13 constitute a first working surface; the first clamping surface 1 of the second frame member 11 and the fourth frame member 13 is set in the opposite direction to the first clamping surface 1 of the first frame member 10 and the third frame member 12, and the first clamping surface 1 of the second frame member 11 and the fourth frame member 13, and the second clamping surface 6 of the first frame member 10 and the third frame member 12 constitute a second working surface.

[0051] Compared with the structure in which only the fourth frame member 13 is set in reverse to form a blocking and positioning structure in the first embodiment, the four frame members in the second embodiment have the same direction of the clamping surfaces of the frame members that are opposite to each other. In this way, in the first working surface, the first frame member 10 and the third frame member 12 provide guidance, the second frame member 11 and the fourth frame member 13 are unobstructed, and both sides can be inserted into the front group. In the second working surface, the second frame member 11 and the fourth frame member 13 provide guidance, the first frame member 10 and the third frame member 12 are unobstructed, and both sides can be inserted into the rear group.

[0052] That is, when the front group or the rear group is inserted, the two sides of the insertion direction are limited by the corresponding frame parts, and there is no obstruction in the insertion direction, so that the front group or the rear group can be inserted from the two unobstructed sides, respectively, so as to facilitate further downward compatibility. On the basis of not affecting the existing combination functions, the scope of application is expanded, for example, it can be compatible with wide-format cameras with a frame size of 6*12 (cm). Figure 4 That is, a combined photographic system suitable for 612 frame.

[0053] With respect to the photographic systems provided in the above two embodiments, the conversion of the photographic system functions has the following usage modes:

[0054] 1. Hyperfocal quick shot mode

[0055] like Figure 5 and Figure 6As shown, after the frame structure 14 of the required size is assembled, the front part of the frame structure 14, i.e., the first working surface, is used to install a pig mouth 17 of a specific size, and the lens 16 and the shutter are installed in the front part of the pig mouth 17. The rear part of the frame structure 14, i.e., the second working surface, is used to install a focusing screen and a film holder. In this mode, the pig mouth 17, the lens 16 and the shutter installed in the front part of the pig mouth 17 are the front group, and the focusing screen and the film holder are the rear group.

[0056] In this mode, the lens cannot be adjusted to focus, and the hyperfocal distance photography method is used for shooting. It has the simplest structure, the lowest cost, the lightest weight, and the fastest shooting speed. It is mainly used for landscape photography that emphasizes lightness and quick snapshots.

[0057] 2. Focus ring 21 quick shot mode

[0058] like Figure 7 and Figure 8 As shown, after the frame structure 14 of the required size is assembled, the front part of the frame structure 14, i.e., the first working surface, is used to install a pig mouth 17 of a specific size, a focus ring 21 is installed at the front part of the pig mouth 17, and a lens 16 and a shutter are installed on the focus ring 21. The rear part of the frame structure 14, i.e., the second working surface, is used to install a focus screen and a film holder. In this mode, the pig mouth 17, the focus ring 21, the lens 16, and the shutter are the front group, and the focus screen and the film holder are the rear group.

[0059] In this mode, the lens adjusts the focus distance through the focus ring 21, and the focus result is confirmed on the focus screen. The structure is simple and low cost, and the focus function is taken into account. It is mainly used for landscape photography and outdoor photography that emphasizes lightness.

[0060] 3. Portable leather case 18 mode

[0061] like Fig. 9 and Fig.10 As shown, after assembling the frame structure 14 of the required size, the frame structure 14 is connected to the front metal frame 19 by using the bellows 18, the lens board 15 is installed on the front metal frame 19, the lens 16 and the shutter are installed on the lens board 15, and the rear of the front metal frame 19 is connected to the front of the bellows 18. The rear of the bellows 18 is connected to the first working surface of the frame structure 14, and the rear of the frame structure 14, i.e., the second working surface, is installed with a focusing screen and a film clamp. A standard 15mm conduit and a fastening pipe clamp are installed at the lower part of the frame and connected to the front metal frame 19.

[0062] This mode involves utilizing a bellows 18 to connect a front metal frame 19 and a frame structure 14 to form the middle portion of the camera.

[0063] In this mode, the lens is focused by sliding the 15mm tube, or by installing a focus ring 21 on the lens board 15, and the focus result is confirmed by observing on the focus screen. The structure is simple and the volume is small after compression, and lenses of different focal lengths can be easily replaced. It is mainly used for outdoor photography that emphasizes lightness and compactness.

[0064] 4. Dual-track model

[0065] like Fig.11 and Fig.12 As shown, this mode also involves a frame structure 14 and a front metal frame 19. After the frame structure 14 of the required size is assembled, the front part of the frame structure 14, i.e., the first working surface, is used to install a bellows 18 of a specific size. The front metal frame 19 is installed at the front of the bellows 18. The lens board 15 is installed on the front metal frame 19. The lens 16 and the shutter are installed on the lens board 15. The rear part of the frame structure 14, i.e., the second working surface, is used to install a focusing screen and a film clip. A double-track module 22 is installed at the bottom of the frame structure 14 and the front metal frame 19. The slide plate part of the double-track module 22 is connected to the front metal frame 19.

[0066] In this mode, the lens is focused through the dual-track module 22, and the focus result is confirmed on the focus screen. The structure is relatively complex and the weight is slightly heavy, but it can still be folded to improve portability, and lenses of different focal lengths can be easily replaced. It is mainly used for outdoor technical photography that requires shifting action.

[0067] 5. Single track mode

[0068] This mode also involves a frame structure 14 and a front metal frame 19. After the frame structure 14 of the required size is assembled, a bellows 18 of a specific size is installed at the front of the frame structure 14, and a front metal frame 19 is installed at the front of the bellows 18. A lens board 15 is installed on the front metal frame 19, and a lens 16 and a shutter are installed on the lens board 15. A focusing screen and a film clamp are installed at the rear of the frame structure 14. A monorail module is installed at the bottom of the frame structure 14 and the front metal frame 19, and the front frame of the monorail module is connected to the front metal frame 19. In this mode, the lens is focused through the monorail module, and the focusing result is observed and confirmed on the focusing screen. The structure is relatively complex and heavy. It is easy to replace lenses of different focal lengths and make large-scale shift movements. It is mainly used for technical photography that requires complex shift movements.

[0069] 6. Applied to amplifier

[0070] By adopting the above-mentioned portable leather case mode, dual-track mode or single-track mode, replacing the projection module on the rear group, inserting the photographed and washed negative film, the negative film can be projected onto the enlargement paper for enlargement.

[0071] 7. Application in projectors

[0072] By adopting the above-mentioned portable bellows mode, dual-track mode or single-track mode, replacing the projection module on the rear group, inserting the photographed and washed reversal film, the film can be projected onto the screen for direct viewing.

[0073] The photographic system designed in this way can be applied to, but not limited to, a variety of photographic equipment such as non-folding instant cameras, portable folding leather case 18 cameras, folding dual-track cameras, non-folding dual-track cameras, single-track cameras, projectors, enlargers, etc., and the frame parts 14 can be used to combine as needed to form an intermediate system of the corresponding frame size required by the photographic equipment. There is no need to customize the equipment one by one according to the frame size, which effectively reduces the equipment investment cost.

[0074] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A frame-type fully modular medium and large format photography system for connecting a front group and a rear group, characterized by: It comprises a plurality of frame members which are combined to form a frame structure (14), wherein the combined frame structure (14) has a first working surface, the first working surface of the frame structure (14) is opposite to the second working surface, the outer peripheral surface of the frame after the combined frame structure (14) is the outer side surface, the inner peripheral surface of the frame is the inner side surface, and two adjacent frame members are detachably connected; The first working surface is provided with a first socket for the front group to be plugged in and matched; The second working surface is provided with a second socket for the rear group to plug and mate; A plurality of matching holes (5) are respectively opened on each surface of the frame member.

2. A frame-type fully modular medium and large format photography system as claimed in claim 1, characterized in that: A plurality of frame members are combined to form a frame structure (14) with rectangular working surfaces on both sides; In a group of frame members that enclose and form a frame structure (14), the frame member has a first clamping surface (1), the first clamping surface (1) is opposite to a second clamping surface (6), and the outer side surface and inner side surface of the frame member are consistent with the outer side surface and inner side surface of the frame structure (14); The matching holes (5) are provided on the first clamping surface (1), the second clamping surface (6) and the outer surface of the frame member; Two adjacent frame members are connected and locked by means of through-hole lock nuts, and both ends of the outer side surface of each frame member are symmetrically provided with connection and mounting holes (7); Each frame has a center line on its outer side surface, and any point on the center line has the same vertical distance from the corresponding side clamping surface. The connection and installation hole (7) is arranged offset relative to the center line.

3. A frame-type fully modular medium and large format photography system as claimed in claim 2, characterized in that: In a group of frame members that enclose a rectangular frame structure (14), the connecting end faces between two adjacent frame members are inclined surfaces (9) at an angle of 45 degrees relative to the outer and inner side faces thereof, and the inner side position corresponding to the inclined surface is concave and has an inclined groove surface arranged parallel to the inclined surface, and the connecting and mounting hole (7) is arranged perpendicular to the inclined surface (9), and the connecting and mounting hole (7) is arranged through the inclined surface (9) and the corresponding inclined groove surface.

4. A frame-type fully modular medium and large format photography system as claimed in claim 3, characterized in that: The frame structure (14) comprises four frame members; slots (3) are provided on the first clamping surface (1) and the second clamping surface (6) of the frame members; when the frame members are combined to form the frame structure (14), the slots (3) on the corresponding first working surface are connected to form a first positioning slot, and the slots (3) on the corresponding second working surface are connected to form a second positioning slot; after the front group is matched with the first socket, it is positioned twice through the first positioning slot and closed to block light; after the rear group is matched with the second socket, it is positioned twice through the second positioning slot and closed to block light.

5. A frame-type fully modular medium and large format photography system as claimed in claim 4, characterized in that: A group of frame members that enclose a rectangular frame structure (14) comprises a first frame member (10), a second frame member (11), a third frame member (12) and a fourth frame member (13) that are connected end to end in sequence, wherein first engaging surfaces (1) of the first, second and third frame members (10, 11, 12) are located on the same plane, and the plane and the second engaging surface (6) of the fourth frame member (13) form a first working surface; One end of the fourth frame member (13) is connected to the first frame member (10), and the other end is connected to the third frame member (12); the first clamping surface (1) of the fourth frame member (13) is arranged in the reverse direction relative to the first clamping surface (1) of the second frame member (11); and the plane where the second clamping surfaces (6) of the first, second and third frame members (10, 11, 12) are located and the first clamping surface (1) of the fourth frame member (13) form a second working surface.

6. A frame-type fully modular medium and large format photography system as claimed in claim 5, characterized in that: After the frame members are enclosed to form a rectangular frame structure (14) by means of a through-hole locking nut and a connecting mounting hole (7), the second clamping surface (6) of the fourth frame member (13) is arranged to protrude relative to the first clamping surfaces (1) of the first, second and third frame members (10, 11, 12), and the inner side surface of the fourth frame member (13) and the first clamping surfaces (1) of the first, second and third frame members (10, 11, 12) form a first socket for the front group to be inserted and matched, and the fourth frame member (13) is provided with a plurality of first and second clamping surfaces (6) of the first and second frame members (10, 11, 12). The inner side surface provides a limit for the insertion of the front group; the first clamping surface (1) of the fourth frame member (13) is convexly arranged relative to the first clamping surfaces (1) of the first, second and third frame members (10, 11, 12); the inner side surface of the fourth frame member (13) and the first clamping surfaces (1) of the first, second and third frame members (10, 11, 12) form a second socket for the insertion and matching of the rear group; the inner side surfaces of the first, second and third frame members (10, 11, 12) provide a limit for the insertion of the rear group.

7. A frame-type fully modular medium and large format photography system as claimed in claim 4, characterized in that: A group of frame members that enclose a rectangular frame structure (14) respectively include a first frame member (10), a second frame member (11), a third frame member (12) and a fourth frame member (13) that are sequentially connected end to end; The first clamping surfaces (1) of the first frame member (10) and the third frame member (12), and the second clamping surfaces (6) of the second frame member (11) and the fourth frame member (13) form a first working surface; The first clamping surfaces (1) of the second frame member (11) and the fourth frame member (13) are arranged in the opposite direction to the first clamping surfaces (1) of the first frame member (10) and the third frame member (12); the first clamping surfaces (1) of the second frame member (11) and the fourth frame member (13) and the second clamping surfaces (6) of the first frame member (10) and the third frame member (12) constitute a second working surface.

8. The frame-type fully modular medium and large format photography system according to claim 2, characterized in that: The inner side surface of the frame member is concave and has a plurality of weight-reducing countersunk holes (4).

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