KR101109591B1 - Barrel module - Google Patents

Abstract

An object of the present invention is to provide a barrel module that can reduce the size of the digital image processing device while overcoming the problems caused by the cutting of the lens. To this end, the present invention, the photoelectric conversion unit for converting the light representing the image of the subject into an electrical signal representing the image of the subject; A plurality of lens assemblies disposed between the subject and the photoelectric conversion unit to adjust zoom and focus of an image of the subject reflected on the photoelectric conversion unit; A drive motor assembly for shifting positions of some of the lens assemblies to implement focusing and zooming functions, respectively; And a lens base accommodating the photoelectric conversion unit, the plurality of lens assemblies, and the driving motor assembly, wherein the lens base is provided with a barrel module having grooves corresponding to the outer shapes of the lens barrels constituting the lens assembly.

Description

Barrel module

1 is a plan view of a lens used in a conventional digital image processing apparatus.

Figure 2 is a perspective view of the barrel module according to the present invention.

3 is a cross-sectional view taken along the line III-III of FIG. 2, showing the optical path of the barrel module shown in FIG.

Figure 4 is an exploded perspective view of the barrel module shown in FIG.

FIG. 5 is an exploded perspective view of the lens assembly of the barrel module shown in FIG. 2. FIG.

6 is a perspective view of a lens base;

7 is a perspective view of a barrel cover.

8 is a bottom view of the barrel module shown in FIG. 2.

9 is a cross-sectional view taken along the line VIII-VIII of FIG. 8.

<Explanation of symbols for main parts of drawing>

1: conventional partially cut lens 2: lens

10: first lens assembly 11: G1 lens

12: prism 13: G3 lens

14: first lens barrel 20: second lens assembly

21: second lens barrel 22: clip

23: spring 24: guide arm

26: through hole 27: projection

30: third lens assembly 31: third lens barrel

32: third lens 40: fourth lens assembly

41: fourth lens barrel 45: fourth lens

50, 60: drive motor assembly 51, 61: drive motor

52, 62: drive motor rotation shaft 52a, 62a: lead screw

70: shutter 81, 82: guide bar

90: photoelectric conversion unit

91: optical low pass filter 95: CCD

100: barrel module 110: lens base

111: first lens barrel connecting portion

112, 122: second lens barrel accommodating groove

113: third lens barrel and shutter accommodating groove

114, 124: Fourth lens barrel accommodating groove

115, 125: reinforcement rib 120: barrel cover

The present invention relates to a barrel module of a digital image processing device, and more particularly, a barrel module improved in such a way that a thin thickness can avoid performance degradation due to lens deformation or assembly error and can reduce manufacturing cost. It is about.

A digital image processing device allows you to save a video of a subject as a digital file of a picture or video.It is a digital still camera (DSC), a digital video camera (DVC), or a digital phone mounted on a mobile phone Cameras and the like.

1 is a plan view of a lens conventionally used in a digital image processing apparatus.

As shown in FIG. 1, the outer portion 1a of the lens 1 has been partially cut and used to meet the trend of decreasing the size of the digital image processing apparatus. As described above, when the outer portion 1a of the lens 1 is partially cut, the thickness of the barrel module constituting the digital image processing apparatus may be reduced.

However, when the lens 1 is partially cut and used, the lens 1 may be deformed during the cutting process, thereby degrading the function of the lens 1. In addition, it is difficult to mount the lens 1 at the optical axis center in the assembling process, which may lower a photographing resolution, and there is a problem in that a manufacturing process is increased by adding a cutting process. Therefore, the need to find a way to solve these problems has emerged.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a barrel module that can reduce the size of the digital image processing device while overcoming the problems caused by cutting the lens.

An object of the present invention as described above, the photoelectric conversion unit for converting the light representing the image of the subject into an electrical signal representing the image of the subject; A plurality of lens assemblies disposed between the subject and the photoelectric conversion unit to adjust zoom and focus of an image of the subject reflected on the photoelectric conversion unit; A drive motor assembly for shifting positions of some of the lens assemblies to implement focusing and zooming functions, respectively; And a lens base accommodating the photoelectric conversion portion, the plurality of lens assemblies, and the drive motor assembly, wherein the lens base has a barrel module having grooves corresponding to the outer shapes of the lens barrels constituting the lens assembly. do.

Here, the lens base is preferably provided with a reinforcing rib parallel to the groove.

The lens base may further include a barrel cover covering the opening of the lens base in a state where the photoelectric conversion unit, the plurality of lens assemblies, and the driving motor assembly are accommodated in the lens base, and the barrel cover includes a lens constituting the plurality of lens assemblies. It is preferable that grooves corresponding to the outer shape of the barrel are formed.

Here, the groove is formed in a length corresponding to the moving width of the lens barrel, the cross-sectional shape is preferably formed in a gentle curve.

Hereinafter, with reference to the accompanying drawings will be described in detail a specific embodiment of the present invention.

Figure 2 is a perspective view showing a schematic configuration of the barrel module according to the present invention, a view showing a state in which the barrel cover is separated, Figure 4 is a first lens barrel, base and in the barrel module shown in FIG. An exploded perspective view of the cover separated is shown, and FIG. 5 is an assembly view showing the configuration of the lens assembly installed in the barrel module illustrated in FIG. 1, and FIG. 6 is a perspective view of the lens base illustrated in FIG. 7. Shows a perspective view of the barrel cover.

As shown in FIGS. 2 to 5, the barrel module according to the present invention includes a barrel cover 120, a lens base 110 and a barrel assembly.

The barrel assembly includes first to fourth lens assemblies 10, 20, 30, and 40, two drive motor assemblies 50 and 60, and a photoelectric conversion unit 90. The first lens assembly 10 includes a first lens barrel 14 having a front opening facing a subject and a side opening at a 90 degree angle, a G1 lens 11 disposed at the front opening, and a side opening. The prism 12 installed in the G3 lens 13 and the first lens barrel 14 to change the traveling direction of light by 90 degrees so that the light incident on the G1 lens 11 is directed to the G3 lens 13. It includes.

The second to fourth lens assemblies 20, 30, and 40 include lens barrels 21, 31, and 41, and lenses installed in the lens barrels 21, 31, and 41, respectively. The number of lenses included in each lens assembly may be different, as the hemispherical lenses 45 and 46 are respectively disposed such that the front and rear convex surfaces of the fourth lens assembly face the outside of the fourth lens barrel. The detailed configuration of each lens assembly is not characteristic of the present invention, and a detailed description thereof will be omitted. In addition, the second and fourth lens barrels 21 and 41 of the lens barrels 21, 31, and 41 respectively follow two guide bars 81 and 82 disposed across the lens base 110. The lens base 110 is installed to be moved in a predetermined interval. The first and third lens barrels 14 and 31 are disposed in a fixed position in the lens base 110.

The two drive motor assemblies 50 and 60 function as driving sources for allowing the second lens barrel 21 and the fourth lens barrel 41 to move within the lens base 110, respectively. The two drive motor assemblies 50 and 60 each have rotation shafts 52 and 62 on which motor bodies 51 and 61 and lead screws 52a and 62a are formed, and the rotation shafts 52 and 62 of each other. It can be arranged in one line, that is, coaxially, and can be made compact without increasing the size of the barrel module in the width direction or the thickness direction.

In addition, the coaxial arrangement referred to herein means that the axis centerlines of the respective rotation shafts 52 and 62 coincide with each other, but do not share the same axis, but are limited to using the same shaft component compatible with each other. Nor do. The lengths of the rotation shafts 52 and 62 and the pitches of the lead screws 52a and 62a constituting the two motor assemblies may be different from each other depending on the distance required to move the second lens barrel and the fourth lens barrel. .

The photoelectric conversion unit 90 includes an optical low pass filter (OLPF) 91 and a charge coupled device (CCD) 95. The CCD 95 functions to convert light passing through the lenses into an electrical signal, and a complementary metal oxide semiconductor (CMOS) may be used instead of the CCD.

The lens base 110 is a type of case housing the barrel assembly, and the barrel cover 120 is a cover covering the barrel assembly accommodated in the lens base 110.

Meanwhile, a shutter 70 may be installed between the third lens assembly 30 and the fourth lens assembly 40 to be adjacent to the third assembly 30. The shutter 70 functions to adjust the time for which the image of the subject is exposed to the photoelectric conversion unit 90 and includes an operation link 71 protruding outward of the lens base 110.

As shown in Figure 3, the barrel module according to the present invention is composed of a curved optical system that the light path is bent at a right angle by a prism after light is incident on the barrel module. That is, when light is incident through the first lens assembly 10, the optical path is converted by the prism 12, and the second lens assembly 20 and the fourth lens assembly 40 are moved to adjust the focus. In the state, light is incident on the photoelectric conversion unit 90. The reason for this configuration is that when all the lenses are arranged in the direction in which light is incident, the thickness of the front and rear direction of the digital image processing apparatus in which the barrel module is disposed becomes thick. That is, by configuring the optical path to be bent in the 90 degree direction, the thickness of the front and rear direction of the digital image processing apparatus can be greatly reduced.

As shown in FIG. 6, the lens base 110 has a third lens barrel and a shutter accommodating groove 113 near the center, and a first lens barrel connecting portion 111 formed at one end thereof. A second lens barrel accommodating groove 112 is formed between the first lens barrel connecting portion 111 and the third lens barrel and the shutter accommodating groove 113, and the third lens barrel and the shutter accommodating groove 113 are formed. And a fourth lens barrel accommodating groove 114 is formed between the other end portion. The shapes of the second and fourth lens barrel accommodating grooves 112 and 114 correspond to those in which the outer shapes of the second and fourth lens barrels 21 and 41 (FIGS. 2 to 4) are formed in a gentle round shape. It is formed to have a smooth curved cross section.

As described above, the second lens barrel 21 and the fourth lens barrel 41 may be driven by the driving motors 51 and 61 to move a predetermined interval. Accordingly, the second lens barrel accommodating groove 112 and the fourth lens barrel accommodating groove 114 are formed to be long by a predetermined length as indicated by hatching, and the second lens barrel 21 and the fourth lens barrel are respectively disposed thereon. The 41 can move while sliding.

In addition, as the lens barrel receiving grooves 112 and 114 are formed, the lens base 110 is partially thinned. Accordingly, the reinforcing rib 115 is formed in the lens base 110 in order to prevent deformation or damage caused by weakening the rigidity of the lens base 110.

As shown in FIG. 7, the barrel cover 120 has a gentle curved cross-sectional shape corresponding to the outer shape of the second lens barrel 21 and the fourth lens barrel 41, similar to the lens base 110. The two lens barrel accommodating grooves 122 and the fourth lens barrel accommodating grooves 124 are formed, respectively. Reinforcing ribs 125 are formed around the second lens barrel accommodating groove 122 and the fourth lens barrel accommodating groove 124 to form the second and fourth lens barrel accommodating grooves 122 and 124, respectively. To prevent the weakening of the barrel cover 120 accordingly.

The lens barrel accommodating grooves 112, 114, 122, and 124 or the reinforcing ribs 115 and 125 described above may be simultaneously formed in the process of manufacturing the lens base 110 and the barrel cover 120 by plastic injection molding or the like. As such, the manufacturing process does not increase or compound as the lens barrel receiving grooves 112, 114, 122, 124 are formed or the reinforcing ribs 115, 125 are formed.

8 is a bottom view of the barrel module according to the invention, and FIG. 9 is a cross-sectional view taken along the line VIII-VIII of FIG. 8.

Referring to the drawings, as described above, by forming the lens barrel receiving grooves 112 and 122 in the lens base 110 and the barrel cover 120, the thickness t of the barrel module without cutting the lens 2 partially. It is possible to produce small. In addition, by forming the reinforcement ribs 115 and 125 in the lens base 110 and the barrel cover 120, the lens base 110 and the barrel cover 120 of the lens base 110 and the barrel cover 120 are formed by forming the lens barrel accommodating grooves 112 and 122. Stiffness can be prevented.

The barrel module having such a configuration controls the driving motors 51 and 61 to move the second and fourth lens barrels 21 and 41 to adjust the auto focus distance (AF), the zoom function, and the like. Implement Two drive motors are preferably used as described above to implement functions such as auto focus and zoom.

For example, in the zoom-out mode, the driving motors 51 and 61 rotate in a direction away from the shutter 70 and the second lens assembly 20 and the fourth lens assembly 40, respectively. In the zoom-in mode, rotation directions of the driving motors 51 and 61 are controlled to move the second lens assembly 20 and the fourth lens assembly 40 toward the shutter 70.

It is preferable to use a stepper motor as the drive motors 51 and 61 in view of securing position accuracy and ease of control. In addition, it is preferable to use a small motor because it can reduce the overall size of the barrel module.

As described above, according to the present invention, as well as reducing the size of the barrel module and the digital image processing apparatus having the same in the thickness direction, which can implement the auto focus and zoom functions, the lens quality by using the lens without cutting Can be prevented and the manufacturing process can be simplified.

On the other hand, the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

Claims (7)

A photoelectric conversion unit converting light representing an image of the subject into an electrical signal representing an image of the subject; A plurality of lens assemblies disposed between the subject and the photoelectric conversion unit to adjust zoom and focus of an image of the subject reflected on the photoelectric conversion unit; A drive motor assembly for shifting positions of some of the lens assemblies to implement focusing and zooming functions, respectively; And It includes a lens base for receiving the photoelectric conversion unit, a plurality of lens assembly and a drive motor assembly, And a groove corresponding to the outer shape of the lens barrels constituting the lens assembly is formed in the lens base. The method of claim 1, And the lens base has a reinforcing rib installed in parallel with the groove. The method of claim 1, And a barrel cover covering the opening of the lens base in a state where the photoelectric conversion unit, the plurality of lens assemblies, and the driving motor assembly are accommodated in the lens base. The barrel cover is a barrel module, characterized in that a groove corresponding to the outer shape of the lens barrel constituting the plurality of lens assembly is formed. 4. The method according to any one of claims 1 to 3, And the groove is formed to have a length corresponding to the moving width of the lens barrels. The method of claim 4, wherein The cross-sectional shape of the groove is a barrel module, characterized in that formed in a curved surface corresponding to the outer shape of the lens barrel. The method of claim 3, wherein A barrel module, characterized in that the barrel cover is formed with a reinforcing rib in parallel with the groove. A photoelectric conversion unit converting light representing an image of the subject into an electrical signal representing an image of the subject; A first lens assembly having an optical axis bending ability at a predetermined angle to bend the incident image to transfer the incident image of the subject to the photoelectric conversion unit; A plurality of lens assemblies which adjust zoom and focus of an image of a subject projecting the curved image from the first lens assembly onto the photoelectric conversion unit; A drive motor assembly for shifting positions of some of the lens assemblies to implement focusing and zooming functions, respectively; And It includes a lens base for receiving the photoelectric conversion unit, a plurality of lens assembly and a drive motor assembly, And a groove corresponding to the outer shape of the lens barrels constituting the lens assembly is formed in the lens base.

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