KR101109590B1 - Barrel module - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a barrel module having a reduced width in the width direction so as to further reduce the size of the digital image processing apparatus. 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; And two drive motor assemblies each of which moves two positions of the lens assembly to realize focusing and zooming functions, wherein the two drive motor assemblies have their rotation axes coaxially disposed with each other. To provide.

Description

Barrel module

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

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, showing a light path of the barrel module shown in FIG. 1. FIG.

3 is an exploded perspective view of the barrel module shown in FIG. 1.

4 is an assembly view of the barrel module shown in FIG.

5 is a view showing a configuration of a connection portion of a drive motor and a second lens barrel.

6 is a perspective view of the clip.

<Explanation of symbols for main parts of drawing>

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 rotary shaft 70: shutter

81, 82: guide bar 90: photoelectric conversion section

91: optical low pass filter 95: CCD

100: barrel module 110: lens base

120: barrel cover 52a, 62a: lead screw

The present invention relates to a barrel module of a digital image processing apparatus, and more particularly, to a barrel module having a reduced size as well as a thickness.

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. Such digital image processing apparatuses have been gradually reduced in size, and thus, focusing on reducing the thickness of the digital image processing apparatus has been focused so far. However, this has resulted in the reduction of the thickness of the barrel module, which is essential for the digital image processing apparatus, but not the width thereof. Therefore, the necessity to find a way to reduce the width of the barrel module to further reduce the size of the digital image processing device.

The present invention was devised to solve the above problems, and an object of the present invention is to provide a barrel module having a reduced width in the width direction so as to further reduce the size of the digital image processing apparatus.

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; And two drive motor assemblies each of which moves two positions of the lens assembly to realize focusing and zooming functions, wherein the two drive motor assemblies have their rotation axes coaxially disposed with each other. Is achieved by providing

Here, the plurality of lens assembly is composed of four lens assembly, the first and third lens assembly located closest to the subject in the order of passing the light representing the image of the subject is fixed, the first lens assembly 변화 changes a path of light representing an image of the subject by 90 degrees, and the second and fourth lens assemblies may be moved by the driving motor assembly.

Here, each of the second and fourth lens assemblies includes a lens barrel and a lens, and the lens barrel is preferably integrally coupled to the clip coupled while pressing the rotation shaft of the drive motor assembly.

Here, the second and fourth lens assemblies are preferably moved along a guide bar disposed across the lens base.

Here, the guide barrel is formed on both sides of the lens barrel, and the guide bar is preferably disposed to penetrate through the through hole formed in the guide arm.

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

1 is a perspective view showing a schematic configuration of a barrel module according to the present invention, a view showing a state in which the barrel cover is separated, Figure 2 is a cross-sectional view showing an optical path of the barrel module shown in FIG. 3 is an exploded perspective view illustrating a first lens barrel, a base, and a cover separated from the barrel module illustrated in FIG. 1, and FIG. 4 illustrates a configuration of a lens assembly installed in the barrel module illustrated in FIG. 1. Assembly diagram is shown.

As shown in FIGS. 1 to 4, 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 so 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. By the rotational movement of the motor, the clip is moved straight along the lead screw of the rotary shaft and the barrel is also linearly moved, and the barrel is supported by a guide bar arranged parallel to the motor shaft so as to prevent the tilt of the barrel. 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 a shutter FPCB 71 protruding outward of the lens base 110.

As shown in Figure 2, 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 the light is incident to 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.

FIG. 5 is a perspective view illustrating a configuration in which the second lens assembly is connected to the driving motor in the barrel module illustrated in FIGS. 1 to 4, and FIG. 5 is a perspective view of the clip.

The second lens barrel 21 has a hollow portion for accommodating a second lens (not shown) at the center thereof, and guide arms 24 connected to the guide bars 81 and 82 (see FIG. 3) are integrally formed at both sides. It is formed. The guide arm 24 is engaged with the guide bars 81 and 82 through through holes formed at one side thereof, and one of the guide arms 24 is engaged with the guide bar 81 when the clip 22 is engaged. ) Are combined together.

The clip 22 may be fitted to the lead screw 52a formed around the rotation shaft 52 of the driving motor 51 and may be transported along the rotation shaft 52 according to the rotation of the driving motor 51. Since the clip 22 is coupled to the guide bar 81 together with one of the guide arms 24, the second lens barrel connected to the clip 22 by rotation of the drive motor 51 ( 21 may be transported along the rotation shaft 52 and the guide bar 81.

In addition, the guide bar 81 is coupled to the through hole 26 formed in the clip 22, and the spring 23 is coupled to the portion to which the guide bar 81 is coupled. The spring 23 is a force in the direction in which the pressing force so that the friction force between the lead screw 52a of the rotary shaft and the projection 27 of the clip when the clip 22 is fitted to the rotary shaft 52 of the motor To act.

As shown in FIG. 6, the clip 22 has a through hole 26 through which the guide bar 81 penetrates, and a lead screw is fitted to a portion of the clip 22 that is fitted with the rotation shaft 52 of the drive motor 51. Protrusions 27 are formed to be coupled while pressing 52a. As the rotating shaft 52 rotates, the lead screw 52a of the rotating shaft pushes the protrusions 27 to allow the movement of the second lens barrel 21 coupled to the clip 22.

Meanwhile, the fourth lens barrel 41 may have a different shape, but may be connected to the driving motor using a clip in the same manner as the second lens barrel 21 so as to be transported along the guide bar.

The barrel module having such a configuration controls the driving motors to move the second and fourth lens barrels to implement auto focusing (AF) and zoom functions. In order to implement functions such as auto focusing and zooming, two drive motors are preferably used as described so far.

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. In the case of using a small drive motor and coaxially arranging the rotating shafts of the motors as in the present invention, the size of the barrel module can be reduced in the thickness direction as well as in the width direction. It is possible to reduce the size of the digital image processing apparatus that employs.

As described above, according to the present invention, it is possible to reduce the size of the barrel module capable of implementing auto focusing and zooming functions and the digital image processing apparatus including the same in the thickness direction as well as the width direction.

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 (6)

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; And Two drive motor assemblies each of which shifts two positions of the lens assembly to implement focusing and zooming functions, And the two drive motor assemblies have their rotating shafts disposed coaxially with each other. The method of claim 1, The plurality of lens assemblies are composed of four lens assemblies, The first and third lens assemblies, which are located closest to the subject in the order in which the light representing the image of the subject passes, are fixed. The first lens assembly changes the path of light representing the image of the subject by 90 degrees, And the second and fourth lens assemblies are movable by the drive motor assembly. The method of claim 2, The second and fourth lens assemblies each include a lens barrel and a lens, And a clip coupled to the lens barrel while being integrally coupled to press the rotation shaft of the drive motor assembly. The method of claim 2, And a lens base surrounding the lens assembly, wherein the second and fourth lens assemblies move along a guide bar disposed across the lens base. The method of claim 4, wherein And a guide arm formed at both sides of the lens barrel, and the guide bar penetrates through a through hole formed in the guide arm. 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; And Two drive motor assemblies each of which shifts two positions of the lens assembly to implement focusing and zooming functions, And the two drive motor assemblies have their rotating shafts disposed coaxially with each other.

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