CN219435202U

CN219435202U - Projector flange distance rotation adjusting device

Info

Publication number: CN219435202U
Application number: CN202223320376.XU
Authority: CN
Inventors: 唐家澍; 唐海平
Original assignee: Shanghai Guangzhi Optical Industry Co ltd
Current assignee: Shanghai Guangzhi Optical Industry Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-07-28
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a projector flange distance rotation adjusting device which comprises a projector and a lens main barrel arranged at the front end of the projector, wherein a multi-head thread structure is arranged between the projector and the lens main barrel, the multi-head thread structure comprises a connecting barrel, one end of the connecting barrel is connected with the projector, a sliding ring is arranged in the connecting barrel in a sliding mode, the sliding ring is connected with the lens main barrel, a hand wheel is rotatably arranged outside the connecting barrel, a guide groove is formed in the side wall of the connecting barrel, a protruding portion is arranged on the sliding ring, the protruding portion penetrates through the guide groove, male threads are arranged on the surface of the protruding portion, female threads are arranged on the inner side wall of the hand wheel, and the female threads are meshed with the male threads. According to the utility model, after the lens main barrel of the projector is rotated through the multi-head thread structure, the inner slide ring is pushed to move forwards and backwards to adjust the flange between the projector and the lens main barrel, so that the flange distance can be adjusted more finely.

Description

Projector flange distance rotation adjusting device

Technical Field

The utility model belongs to the technical field of projectors, and particularly relates to a projector flange distance rotation adjusting device.

Background

The projector is used as office equipment and widely applied to different occasions such as teaching, scientific research, meeting, reporting and the like. Flange distance (also called focal plane distance), which is the distance between a metal ring on a body and contacted with a lens main barrel and an imaging medium, is usually expressed by millimeter mm, when the flange distance between a projector and the lens main barrel is adjusted in the prior art, the lens main barrel needs to be detached from the projector and then is adjusted through adjusting a bayonet gasket, so that two problems are caused in adjustment, namely, the lens main barrel needs to be assembled and disassembled every time of adjustment, and the efficiency is low; 2. the gasket size is limited and fine (e.g., 0.01) adjustment is not possible.

The utility model patent application number 2020221656647 discloses a projector with a manual focusing function for video playing, and relates to the technical field of video playing devices. The projector with the manual focusing function for video playing comprises a projector main body, a zoom lens is arranged in a projection opening of the projector main body, a movable rod is fixedly connected to the right side of the bottom of the zoom lens, the bottom of the right end of the movable rod is fixedly connected with the outer wall of a bolt, the inner wall of the bolt is in threaded connection with a threaded rod, and the right end of the threaded rod is fixedly connected with an output shaft of a miniature motor. This projector for video broadcast with manual focusing function, when the electric control device damages and can't adjust the zoom lens, can adjust the position of zoom lens through the knob for the focusing of this projector both can be through electric control, also can be through manual control, can reduce effectively because electric control device damages can't carry out focusing to the projector and delay time, has improved the practicality of this projector.

The above patent is applied to the field of focusing of a projector lens main barrel, and can also be applied to adjustment of flange distance, but the adjustment method needs to be adjusted by arranging a plurality of threaded rods and gear meshing, and the scheme makes assembly difficulty of parts large and mounting steps complex.

Disclosure of Invention

In order to solve the problems, the utility model provides a projector flange distance rotation adjusting device which comprises a projector and a lens main barrel arranged at the front end of the projector, wherein a multi-head thread structure is arranged between the projector and the lens main barrel, the multi-head thread structure comprises a connecting barrel, one end of the connecting barrel is connected with the projector, a slide ring is slidably arranged in the connecting barrel and is connected with the lens main barrel, a hand wheel is rotatably arranged outside the connecting barrel, a guide groove is formed in the side wall of the connecting barrel, a protruding portion is arranged on the slide ring, the protruding portion penetrates through the guide groove, male threads are arranged on the surface of the protruding portion, female threads are arranged on the inner side wall of the hand wheel, and the female threads are meshed with the male threads.

Preferably, scale marks are uniformly engraved on the circumferential surface of the hand wheel.

Preferably, a positioning structure is arranged between the inner side edge of the guide groove and the side edge of the protruding part.

Preferably, the positioning structure comprises a filling part and a connecting part which are integrally formed, and the filling part is filled between the inner side edge of the guide groove and the side edge of the protruding part.

Preferably, a side of the filling part facing the protruding part is a flat surface.

Preferably, the connecting part is arranged between the bottom of the protruding part and the bottom of the guide groove, the surface of the connecting part is provided with a slotted hole, and the slide ring is provided with a connecting hole matched with the slotted hole in position.

Preferably, the top of the connecting cylinder is provided with a limiting part, and the diameter of the limiting part is larger than that of the connecting cylinder.

Preferably, four guide grooves are symmetrically formed in the connecting cylinder, four corresponding protruding portions are arranged on the sliding ring, and positioning structures are arranged between the guide grooves and the protruding portions.

Preferably, the outer diameter of the hand wheel is the same as the outer diameter of the limiting part.

Preferably, the bottom of the projector is provided with supporting legs at the periphery.

The utility model has the advantages that:

1. in the scheme, the flange distance is adjusted through the multi-head thread structure without detaching the lens main barrel from the projector, the flange distance can be adjusted only by rotating the outer female thread, and meanwhile, the fine adjustment is possible due to the multi-head thread structure, so that the adjustment is not limited by the size of the gasket. Moreover, the scheme has the advantages of simple assembly of operating parts and convenient operation.

2. The positioning mechanism is arranged in the scheme, so that gaps can be eliminated, the moving precision of the slide ring is further increased, and the flange distance is adjusted more finely.

3. According to the scheme, scale marks are engraved on the hand wheel, and specific adjustment distances can be seen in real time.

Drawings

FIG. 1 is a perspective view of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the structure of the present utility model;

FIG. 3 is a view showing a structure of a lens barrel according to the present utility model;

FIG. 4 is a view of the lens barrel of the present utility model without a hand wheel;

fig. 5 is a state diagram of the lens barrel of the present utility model without positioning structure.

In the figure: 1 projector, 2 lens main cylinder, 3 connecting cylinder, 4 slide ring, 5 hand wheel, 6 guide way, 7 bulge, 8 scale mark, 9 filling part, 10 connecting part, 11 slotted hole, 12 connecting hole, 13 spacing part, 14 stabilizer blade.

Description of the embodiments

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. Meanwhile, when an element is referred to as being "fixed" or "disposed" on another element, it may be directly on the other element or intervening elements may be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "fixedly connected to" another element, it can be conventionally connected by welding or bolting or gluing. In summary, it will be understood by those of ordinary skill in the art that the specific meaning of the terms described above in this disclosure is to be understood in a specific sense.

Examples

The utility model provides a projector flange is apart from rotary adjusting device, as shown in fig. 1 and 2, including projector 1 and locate the camera lens main drum 2 of projector 1 front end, be equipped with stabilizer blade 14 around the bottom of projector, be used for supporting projector 1, be equipped with the bull thread structure between projector 1 and the camera lens main drum 2, the bull thread structure includes connecting drum 3, the bayonet joint of one end and projector 1 of connecting drum 3, the inside slip of connecting drum 3 is equipped with the retainer 4, the retainer 4 is connected with camera lens main drum 2, the mode of both connections can be integrated into one piece or through bolted connection, as shown in fig. 4 and 5, guide way 6 has been seted up on the lateral wall of connecting drum 3, be equipped with bulge 7 on the retainer 4, bulge 7 passes guide way 6 and can carry out axial sliding in guide way 6, during bulge 7 axial sliding, guide way 6 plays the guide way, be equipped with the male thread at bulge 7's surface, as shown in fig. 3, the outside rotation of connecting drum 3 is equipped with hand wheel 5, be equipped with the female thread on the inside wall of hand wheel 5, the female thread on the inside wall of hand wheel 5 and the male thread of bulge 4 on the inside wall of hand wheel 5 meshes with the male thread 7 on bulge 7. By turning the hand wheel 5, the protruding part 5 can be driven to slide in the guide groove 6.

The top of connecting cylinder 3 is equipped with spacing portion 13, and the diameter of spacing portion 13 is greater than the diameter of connecting cylinder 3, and axial displacement takes place upwards when spacing portion 13 can restrict hand wheel 5 rotation, and one side that keeps away from spacing portion 13 on the connecting cylinder 3 also can be equipped with the same limit structure like the spacing ring, takes place axial displacement when playing to avoid hand wheel 5 rotation.

Scale marks 8 are evenly engraved on the circumferential surface of the hand wheel 5, when the hand wheel 5 rotates, the protruding portion 7 can move left and right axially in the guide groove 6 through the matching of female threads and male threads, so that the slide ring 4 is driven to move axially, the slide ring 4 drives the lens main barrel 2 to move axially, and the distance between the lens main barrel 2 and the bayonet of the projector 1 is changed, namely the flange distance between the lens main barrel 2 and the projector 1 is changed. The scale mark 8 on the hand wheel 5 corresponds to the rotation angle, for example, a pointer may be provided on the limit portion 13, when the hand wheel 5 rotates by 30 °, the scale mark on the pointer pointing to the hand wheel 5 is 0.6mm, and when the hand wheel 5 rotates by 60 °, the scale mark on the pointer pointing to the hand wheel 5 is 1.2mm.

Examples

Because of processing problems, as shown in fig. 5, a certain gap exists between the protruding portion 7 and the guiding groove 6, the gap can make the female screw not drive the male screw to move up and down at the first time when the female screw rotates, but rotate together until the male screw is close to the side wall of the guiding waist groove, for example, the hand wheel 5 rotates 30 degrees, the original slide ring 4 should move 0.6mm, and as a result, the slide ring actually moves 0.5mm, which can affect the accurate adjustment of the flange distance, therefore, in combination with fig. 4 and 5, a positioning structure is arranged between one side of the protruding portion 7 and the side wall of the guiding groove 6, the positioning structure is embedded between one side of the protruding portion 7 and the side wall of the guiding groove 6, and when the positioning structure is embedded between one side of the protruding portion 7 and the side wall of the guiding groove 6, the positioning structure can push the protruding portion 7 to squeeze towards the side wall of the guiding groove 6 at the other side, so as to eliminate the gap between the protruding portion 7 and the guiding groove 6.

The positioning structure comprises a filling part 9 and a connecting part 10 which are integrally formed, wherein the filling part 9 is arranged between the side edge of the inner part of the guide groove 6 and the side edge of the protruding part 7, as shown in fig. 4, the connecting part 10 is used for fixing the filling part 9, the filling part 9 and the connecting part 10 are vertically arranged to form an L-shaped structure, a slotted hole 11 is formed in the connecting part 10, and the connecting part 10 and the filling part 9 can be fixed by penetrating through the slotted hole 11 in the connecting part 10 and a connecting hole 12 in the slide ring 4 through bolts. When the positioning structure is to be embedded, the protruding part 7 moves rightwards, the right side of the protruding part 7 is tightly connected with the right side of the guide groove 6, a gap does not exist between the right side of the protruding part 7 and the left side of the guide groove 6, the positioning structure is embedded between the left side of the protruding part 7 and the left side of the guide groove 6, the left side of the protruding part 7 and the left side of the guide groove 6 are filled, one side of the filling part 9, which faces the protruding part 7 and faces away from the protruding part 7, is a flat surface, the left side of the protruding part 7 is free from a gap, and when the female screw on the inner side wall of the hand wheel 5 drives the female screw on the protruding part 7 to move, the problem of an empty layer cannot occur due to the fact that the gap does not exist. When the hand wheel 5 is rotated, the slide ring 4 walks according to the design value, so that the flange distance can be accurately adjusted.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A projector flange distance rotation adjusting device is characterized in that: including projecting apparatus (1) and locate camera lens main cylinder (2) of projecting apparatus (1) front end, be equipped with bull helicitic texture between projecting apparatus (1) and the camera lens main cylinder (2), bull helicitic texture includes connecting cylinder (3), the one end and the projecting apparatus (1) of connecting cylinder (3) are connected, the inside slip of connecting cylinder (3) is equipped with slide ring (4), slide ring (4) are connected with camera lens main cylinder (2), the outside rotation of connecting cylinder (3) is equipped with hand wheel (5), guide way (6) have been seted up on the lateral wall of connecting cylinder (3), be equipped with bulge (7) on slide ring (4), bulge (7) pass guide way (6) and the surface is equipped with the male screw thread, the inside wall of hand wheel (5) is equipped with the female screw thread, female screw thread and male screw thread mesh.

2. The projector flange distance rotation adjustment apparatus of claim 1 further comprising: scale marks (8) are uniformly engraved on the circumferential surface of the hand wheel (5).

3. The projector flange distance rotation adjustment apparatus according to claim 2, characterized in that: a positioning structure is arranged between the inner side edge of the guide groove (6) and the side edge of the protruding part (7).

4. A projector flange distance rotation adjustment apparatus according to claim 3, characterized in that: the positioning structure comprises a filling part (9) and a connecting part (10) which are integrally formed, and the filling part (9) is filled between the inner side edge of the guide groove (6) and the side edge of the protruding part (7).

5. The projector flange distance rotation adjustment apparatus of claim 4 further comprising: the filling part (9) is a flat surface on one side facing the protruding part (7).

6. The projector flange distance rotation adjustment apparatus of claim 4 further comprising: the connecting part (10) is arranged between the bottom of the protruding part (7) and the bottom of the guide groove (6), a slotted hole (11) is formed in the surface of the connecting part (10), and a connecting hole (12) matched with the slotted hole (11) in position is formed in the sliding ring (4).

7. The projector flange distance rotation adjustment apparatus of claim 5 further comprising: the top of the connecting cylinder (3) is provided with a limiting part (13), and the diameter of the limiting part (13) is larger than that of the connecting cylinder (3).

8. The projector flange distance rotation adjustment apparatus of claim 7 further comprising: four guide slots (6) are symmetrically formed in the connecting cylinder (3), four corresponding protruding portions (7) are arranged on the sliding ring (4), and positioning structures are arranged between the guide slots (6) and the protruding portions (7).

9. The projector flange distance rotation adjustment apparatus of claim 8 wherein: the outer diameter of the hand wheel (5) is the same as that of the limiting part (13).

10. The projector flange distance rotation adjustment apparatus according to any one of claims 1 to 9, characterized in that: legs (14) are arranged around the bottom of the projector (1).