CN216485718U

CN216485718U - Multi-group focusing mechanism and lens

Info

Publication number: CN216485718U
Application number: CN202122545151.3U
Authority: CN
Inventors: 陈洪平; 韦义壮
Original assignee: Hunan Chiopt Optical Technology Co ltd
Current assignee: Hunan Chiopt Optical Technology Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-05-10
Anticipated expiration: 2031-10-21

Abstract

The utility model discloses a multi-group focusing mechanism and a lens, wherein the multi-group focusing mechanism comprises: the side wall of the straight-advancing cylinder is provided with a plurality of straight-advancing grooves; the first focusing group, the second focusing group and the third focusing group are sequentially assembled in the straight-moving cylinder, and positioning holes are formed in the outer side walls of the first focusing group, the second focusing group and the third focusing group; the CAM barrel is rotatably sleeved outside the straight-moving barrel, and three groups of CAM grooves distributed at intervals are formed in the side wall of the CAM barrel; and each group of transmission assemblies correspondingly penetrate through the CAM groove and the straight-moving groove and then are fixedly connected with the positioning holes. According to the scheme, the plurality of straight-in grooves are formed in the straight-in barrel, the plurality of CAM grooves are formed in the CAM barrel, and the transmission of three groups of transmission assemblies is matched, so that a plurality of focusing groups can be focused stably at the same time, and the three groups of transmission assemblies move in different CAM grooves to enable the three groups of focusing groups to be combined in a linkage mode to form a larger focusing angle.

Description

Multi-group focusing mechanism and lens

Technical Field

The utility model relates to the field of optical lenses, in particular to a multi-group focusing mechanism and a lens.

Background

With the common application of movie and television lenses in shooting, film shooting, live video broadcasting and photographic cameras, the requirement of adapting the lenses to different object distances is needed, especially, consumer movie lenses require the lenses to have a focusing function and higher images, and high-requirement imaging tends to have more focusing groups, larger focusing rotation angles and good focusing hand feeling for optical design imaging. At present, the structure of an endoscope head in the film and television lens industry is mostly focused by threads and an outer CAM focusing structure, and the lens can not realize large-angle focusing and can not be suitable for an optical system for focusing a plurality of focusing groups.

Therefore, a structure that the transmission focusing is smooth, the focusing angle is large, and a plurality of focusing groups can be controlled by a plurality of CAM grooves is more and more urgent.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a multi-group focusing mechanism which can realize stable transmission focusing and large focusing angle and can control a plurality of focusing groups through a plurality of CAM grooves; the utility model also provides a multi-group focusing lens.

According to an embodiment of the first aspect of the utility model, a multi-group focusing mechanism comprises: the side wall of the straight-advancing cylinder is provided with a plurality of straight-advancing grooves; the first focusing group, the second focusing group and the third focusing group are sequentially assembled in the straight-moving cylinder, and positioning holes are formed in the outer side walls of the first focusing group, the second focusing group and the third focusing group; the CAM barrel is rotatably sleeved outside the straight-moving barrel, and three groups of CAM grooves distributed at intervals are formed in the side wall of the CAM barrel; and each group of transmission assemblies correspondingly penetrate through the CAM groove and the straight-moving groove and then are fixedly connected with the positioning holes.

The multi-group focusing mechanism according to the first embodiment of the utility model has at least the following beneficial effects: according to the scheme, the plurality of straight-in grooves are formed in the straight-in barrel, the plurality of CAM grooves are formed in the CAM barrel, and the transmission of three groups of transmission assemblies is matched, so that a plurality of focusing groups can be focused stably at the same time, and the three groups of transmission assemblies move in different CAM grooves to enable the three groups of focusing groups to be combined in a linkage mode to form a larger focusing angle.

According to some embodiments of the first aspect of the present invention, there are two positioning holes in the first focusing group, the second focusing group, and the third focusing group, and the two positioning holes are distributed on the outer sidewall at 180 ° and staggered up and down; and two CAM grooves and two transmission assemblies are arranged in each group and correspond to the positioning holes.

According to some embodiments of the first aspect of the present invention, outer sidewalls of the first focus group, the second focus group and the third focus group are all provided with an avoiding groove for allowing portions of the focus groups to pass through each other.

According to some embodiments of the first aspect of the present invention, the CAM groove is an inner groove body having a depth smaller than a wall thickness of the CAM cylinder, and both ends of the CAM groove are mounting holes penetrating the CAM cylinder.

According to some embodiments of the first aspect of the present invention, the angle of the CAM slot is between 270 ° and 350 °.

According to some embodiments of the first aspect of the present invention, the outer sidewall of the straight-moving cylinder is provided with two spacing blocks, and the inner sidewall of the CAM cylinder is provided with a spacing pin cooperating with the two spacing blocks.

According to some embodiments of the first aspect of the present invention, the CAM cylinder is provided with a countersunk screw hole, and the limiting pin is a pin installed in the countersunk screw hole.

According to some embodiments of the first aspect of the present invention, each of the driving assemblies includes a first driving ring having an outer step, a second driving ring having an outer step, a third driving ring, and a screw, the second driving ring and the third driving ring are sequentially sleeved on the first driving ring, the screw penetrates through the first driving ring and is then in threaded connection with a concave hole tapped at the bottom of the positioning hole, the first driving ring is fastened to the positioning hole, the second driving ring is in sliding fit with the straight groove, and the third driving ring is in sliding fit with the CAM groove.

According to some embodiments of the first aspect of the present invention, the CAM cylinder further comprises a limiting cylinder fixed at one end of the straight-moving cylinder, and the limiting cylinder and the annular protrusion arranged at the other end of the straight-moving cylinder jointly limit the CAM cylinder to move horizontally along the axis.

According to a second aspect of the present invention, a multi-group focusing lens includes the multi-group focusing mechanism, and lenses disposed in the first, second, and third focusing groups.

The multi-group focusing lens according to the second embodiment of the utility model has at least the following advantages: according to the scheme, the plurality of straight-in grooves are formed in the straight-in barrel, the plurality of CAM grooves are formed in the CAM barrel, and the transmission of three groups of transmission assemblies is matched, so that a plurality of focusing groups can be focused stably at the same time, and the three groups of transmission assemblies move in different CAM grooves to enable the three groups of focusing groups to be combined in a linkage mode to form a larger focusing angle.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a multi-group focusing mechanism in accordance with an embodiment of the first aspect of the present invention;

FIG. 2 is an exploded view of a multiple group focusing mechanism according to an embodiment of the first aspect of the present invention;

FIG. 3 is a perspective view of a multi-group focusing mechanism in accordance with an embodiment of the first aspect of the present invention;

FIG. 4 is a perspective view of a linear motion barrel in accordance with an embodiment of the first aspect of the present invention;

FIG. 5 is a perspective view of a first focus group according to an embodiment of the first aspect of the present invention;

FIG. 6 is a perspective view of three focusing groups according to an embodiment of the first aspect of the present invention;

FIG. 7 is a perspective view of a CAM cartridge in accordance with an embodiment of the first aspect of the utility model;

FIG. 8 is a side view of a CAM barrel according to an embodiment of the first aspect of the utility model;

FIG. 9 is a diagram of the CAM slot internal profile of an embodiment of the first aspect of the present invention;

fig. 10 is an exploded view of a drive assembly in accordance with an embodiment of the first aspect of the present invention.

Reference numerals:

a straight advance cylinder 100, a straight advance groove 101 and a limiting block 102;

a first focus group 210, a second focus group 220, a third focus group 230, a positioning hole 201, and an avoiding groove 202;

the CAM barrel comprises a CAM barrel 300, a CAM groove 301, a limiting pin 302, a mounting hole 303 and a countersunk screw hole 304;

a drive assembly 400, a first drive ring 410, a second drive ring 420 with an outer step, a third drive ring 430, a screw 440;

a spacing cylinder 500.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 10, a multi-group focusing mechanism according to an embodiment of the first aspect of the present disclosure includes: the straight-moving cylinder 100 is provided with a plurality of straight-moving grooves 101 on the side wall of the straight-moving cylinder 100, as shown in fig. 4; a first focus group 210, a second focus group 220, and a third focus group 230 sequentially assembled in the linear cylinder 100, wherein positioning holes 201 are formed on outer sidewalls of the first focus group 210, the second focus group 220, and the third focus group 230; the CAM cylinder 300 is rotatably sleeved outside the straight-moving cylinder 100, and three groups of CAM grooves 301 distributed at intervals are formed in the side wall of the CAM cylinder 300; and each group of transmission assemblies 400 correspondingly penetrate through the CAM groove 301 and the straight groove 101 and then are fixedly connected with the positioning hole 201.

When the CAM barrel 300 is rotated left and right, the CAM groove 301 of the CAM barrel 300 and the straight-moving groove 101 of the straight-moving barrel 100 move through the transmission assembly 400, the three focusing groups are driven to move up and down to realize stable focusing, and an object is focused and imaged clearly on a camera through a lens. As described above, according to the scheme, the plurality of straight-moving grooves are formed in the straight-moving cylinder, the plurality of groups of CAM grooves are formed in the CAM cylinder, and the transmission of the three groups of transmission assemblies is matched, so that the plurality of focusing groups can be focused stably at the same time, and the three groups of transmission assemblies move in different CAM grooves to enable the three groups of focusing groups to be combined into a larger focusing angle in a linkage mode.

In some embodiments of the first aspect of the present invention, there are two positioning holes 201 in the first focus group 210, the second focus group 220, and the third focus group 230, and the two positioning holes 201 are distributed on the outer sidewall at 180 ° and staggered up and down, so that the CAM slots are distributed without mutual cutting, as shown in fig. 5; two CAM grooves 301 and two transmission assemblies 400 are arranged in each group and correspond to the positioning holes 201, and as shown in fig. 1, the CAM grooves 301, the transmission assemblies 400 and the positioning holes 201 are distributed in 180 degrees, so that the stability of rotary focusing can be further improved.

As shown in fig. 5 and 6, in some embodiments of the first aspect of the present invention, the outer sidewalls of the first focusing group 210, the second focusing group 220, and the third focusing group 230 are all provided with an avoiding groove 202 for allowing the focusing groups to partially pass through each other, so that the position of the transmission assembly 400 is further moved, and a larger angle focusing is achieved.

As shown in fig. 7 to 9, in some embodiments of the first aspect of the present invention, the CAM groove 301 is an inner groove body, and the depth is smaller than the wall thickness of the CAM cylinder 300, so that the CAM groove 301 does not mill through the cylinder wall, which can effectively prevent the problems of the CAM deformation such as the motion jam friction. And the two ends of the CAM groove 301 are provided with mounting holes 303 penetrating through the CAM cylinder 300, so that the transmission assembly 400 is convenient to mount. The CAM of the scheme is a CAM curve in a coordinate point form, and focusing of nonlinear distance change among groups can be achieved by combining with a groove structure.

In some embodiments of the first aspect of the present invention, the angle of CAM slot 301 is between 270 ° and 350 °.

In some embodiments of the first aspect of the present invention, the outer sidewall of the straight-moving cylinder 100 is provided with two spaced-apart stoppers 102, and the inner sidewall of the CAM cylinder 300 is provided with a stopper pin 302 engaged with the two stoppers 102, so as to control the maximum angle of rotation of the CAM cylinder 300.

In some embodiments of the first aspect of the present invention, the CAM cylinder 300 is provided with a countersunk screw hole 304, and the limit pin 302 is a pin installed in the countersunk screw hole 304, so that the CAM cylinder is convenient to install and detach, and the processing cost is also saved. Of course, the CAM cylinder 300 may be integrally formed with the stopper pin 302.

As shown in fig. 10, in some embodiments of the first aspect of the present invention, each set of the transmission assemblies 400 is a split structure, and includes a first transmission ring 410 having an outer step, a second transmission ring 420 having an outer step, a third transmission ring 430, and a screw 440, where the second transmission ring 420 and the third transmission ring 430 are sequentially sleeved on the first transmission ring 410, the screw 440 penetrates through the first transmission ring 410 and is then threadedly connected to a tapped concave hole at the bottom of the positioning hole 201, the first transmission ring 410 is fastened to the positioning hole 201, the second transmission ring 420 is slidably engaged with the straight groove 101, and the third transmission ring 430 is slidably engaged with the CAM groove 301. Compare monomer formula transmission PIN, the split type structure of this scheme can be convenient for the selective join in marriage transmission ring (PIN) cooperation focusing group, a straight advance section of thick bamboo 100 and a CAM section of thick bamboo 300 of different external diameter specifications, and three external diameter PIN cooperation three section of thick bamboo, the flexibility is strong, better adaptation control fit clearance.

The PIN material is POM plastic, and the external diameter can be with the groove width of straight groove 101 and CAM groove 301 of a straight section of thick bamboo 100 and do interference fit, and the plastic material is lubricated effectual, and it has elasticity to extrude, so can the tight fit, has great improvement to actuating rocking.

In some embodiments of the first aspect of the present invention, the CAM cylinder further includes a limiting cylinder 500 fixed at one end of the straight-moving cylinder 100, and the limiting cylinder and the annular protrusion provided at the other end of the straight-moving cylinder 100 together limit the CAM cylinder 300 to move horizontally along the axis, and the straight-moving cylinder 100 and the limiting cylinder 500 may be screwed or screwed.

Further, a multi-group focusing lens according to the second embodiment of the present invention includes the multi-group focusing mechanism, and lenses disposed in the first focusing group 210, the second focusing group 220, and the third focusing group 230. According to the scheme, the plurality of straight-in grooves are formed in the straight-in barrel, the plurality of CAM grooves are formed in the CAM barrel, and the three groups of transmission assemblies are matched for transmission, so that a plurality of focusing groups can be focused stably at the same time, and the three groups of transmission assemblies move in different CAM grooves to enable the three groups of focusing groups to be combined into a larger focusing angle in a linkage mode.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims

1. A multi-group focusing mechanism is characterized in that: comprises that

The straight-moving cylinder (100), the side wall of the straight-moving cylinder (100) is provided with a plurality of straight-moving grooves (101);

the first focusing group (210), the second focusing group (220) and the third focusing group (230) are sequentially assembled in the straight-moving cylinder (100), and positioning holes (201) are formed in the outer side walls of the first focusing group (210), the second focusing group (220) and the third focusing group (230);

the CAM barrel (300) is rotatably sleeved outside the straight-moving barrel (100), and three groups of CAM grooves (301) distributed at intervals are formed in the side wall of the CAM barrel (300);

and each group of transmission assemblies (400) correspondingly penetrate through the CAM groove (301) and the straight-moving groove (101) and then are fixedly connected with the positioning hole (201).

2. The multi-group focusing mechanism of claim 1, wherein: the number of the positioning holes (201) of the first focusing group (210), the second focusing group (220) and the third focusing group (230) is two, and the two positioning holes (201) are distributed on the outer side wall in a 180-degree mode and staggered up and down; and two CAM grooves (301) and two transmission assemblies (400) in each group correspond to the positioning holes (201).

3. The multi-group focusing mechanism of claim 2, wherein: the outer side walls of the first focusing group (210), the second focusing group (220) and the third focusing group (230) are all provided with avoiding grooves (202) for enabling the focusing groups to partially pass through each other.

4. The multi-group focusing mechanism of claim 1, wherein: CAM groove (301) are the inner cell body, and the degree of depth is less than the wall thickness of a CAM section of thick bamboo (300), just the both ends in CAM groove (301) are for running through mounting hole (303) of a CAM section of thick bamboo (300).

5. The multi-cluster focusing mechanism of claim 1, 2 or 4, wherein: the angle of the CAM slot (301) is between 270 DEG and 350 deg.

6. The multi-group focusing mechanism of claim 1, wherein: the lateral wall of a straight-moving cylinder (100) is provided with two spacing distribution's stopper (102), the inside wall of a CAM section of thick bamboo (300) is provided with two stopper (102) complex spacer pin (302).

7. The multi-group focusing mechanism of claim 6, wherein: a countersunk head screw hole (304) is formed in the CAM cylinder (300), and the limiting pin (302) is a pin arranged in the countersunk head screw hole (304).

8. A multi-cluster focusing mechanism as claimed in claim 1 or 2, wherein: every group transmission assembly (400) all include first transmission ring (410) that have outer step, second transmission ring (420), third transmission ring (430), screw (440) that have outer step, second transmission ring (420), third transmission ring (430) overlap in proper order and locate first transmission ring (410), screw (440) pass behind first transmission ring (410) with the shrinkage pool threaded connection of tooth is attacked to locating hole (201) bottom, first transmission ring (410) with locating hole (201) fastening connection, second transmission ring (420) with straight groove (101) sliding fit, third transmission ring (430) with CAM groove (301) sliding fit.

9. The multi-group focusing mechanism of claim 1, wherein: the CAM cylinder is characterized by further comprising a limiting cylinder (500) fixed at one end of the straight-moving cylinder (100), and the limiting cylinder and an annular bulge arranged at the other end of the straight-moving cylinder (100) limit the CAM cylinder (300) to move horizontally along an axis.

10. A multi-group focusing lens is characterized in that: comprising the multi-group focusing mechanism of any one of claims 1 to 9, and lenses disposed in the first focusing group (210), the second focusing group (220), and the third focusing group (230).