KR100448257B1 - Lens Assembly of Camera for Computer - Google Patents

Abstract

The present invention relates to a lens assembly of a camera, and more particularly, the barrel 120 including the lens 110 is coupled to the holder 40 in a screwed manner and configured to be adjustable in a forward and backward direction, the barrel being forward It is coupled to the knob 200 installed on the front of the camera body case through the cap 130 provided in the rotating the knob is configured to adjust the focusing distance of the lens while rotating together, the outer peripheral portion of the cap 130 is horizontal The cutting surface 132 is formed, and the inner circumference of the knob 200 protrudes from the anti-rotation protrusion 224 at a portion corresponding to the cutting surface of the cap to allow the knob and the cap to rotate together, and the inner circumference of the knob. In the present invention, the coupling protrusion 226 is formed to protrude from the left and right sides of the anti-rotation protrusion so that the cap can be assembled in a press fit manner. By improving the assembly method of the lens can be prevented from being misaligned between the lens and the knob generated during focusing, this is because the focusing adjustment is made accurately, there is an effect of improving the operability and consumer confidence in the product.

Description

Lens Assembly of Camera for Computer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens assembly of a computer camera, and more particularly, to a lens assembly of a computer camera in which the lens unit is prevented from being separated from a knob when the lens unit is focused and adjusted by improving the assembly structure.

In general, the use of computer cameras has been increasing in recent years because the general public has become more aware of the necessity due to the development of communication methods using computers and the construction of infrastructure for them.

In general, computer cameras or digital cameras can be largely divided into CCD and CMOS.

Charge Coupled Devices (CCDs) are optical systems that are typically based on analog circuitry. The system stores the charge for each cell when light coming from the lens is shot at several cells, and knows the magnitude of the intensity as the magnitude of the charge, and sends it to an analog-to-digital converter for color. It is a way of expression.

Complementary Metal Oxide Semiconductor (CMOS) image sensors are a system-on-chip concept that is exactly the same as a CMOS semiconductor process, where analog signals and digital signal processing circuits are integrated in a semiconductor die.

CMOS image sensor has some disadvantages such as CCD's fine expression or subtle color division, and the image quality is deteriorated overall.However, because CMOS image sensor is manufactured by general CMOS process, production process is complicated and production cost is low compared to CCD with low yield. As a result, it is expected to replace CCDs in most applications in the near future, and CCDs will be used in areas requiring high resolution images.

1 shows an example of a general computer camera.

Referring to this, in general, a camera for a computer for video communication or the like is configured such that the main body case 1 is supported by the stand 3, and is used in connection with a PC via a USB cable.

The lens assembly is installed inside the main body case 1 so that the lens 12 is exposed to the front side, and an image plane on which the image sensor is mounted is provided at the rear of the lens assembly.

Referring to FIG. 2, a lens assembly of a conventional computer camera includes a lens unit 10 including a lens 12, a knob 20, and a holder 40.

The lens unit 10 includes a barrel 14 including a lens 12 and a cap 16 having a diameter larger than that of the barrel and coupled to and bonded to the front of the barrel. The threaded portion 14a is formed.

The lens unit 10 is supported by being fitted to the knob 20 assembled to the front of the main body case 1.

In front of the knob 20, a lens exposure hole 22 is formed in a central portion thereof, and a plurality of protrusions 23 protrude from the front edge at predetermined intervals.

In addition, a cylindrical rib 24 extends rearward in the knob 20, and projections 24a protrude in three places at predetermined equal intervals on the rear surface of the rib 24, and the rib 24 is provided. The inner circumference of the has a diameter equal to that of the outer circumference of the cap 16 so that the cap 16 is naturally fitted into the interior of the knob 20 to be coupled.

In addition, the fixing ring 30 is provided to prevent the lens unit 10 coupled to the knob 20 from being separated.

An assembly hole 32 is formed to penetrate the outer circumference of the barrel 14 at the center of the fixing ring 30, and a coupling hole 34 corresponding to the protrusion 24a of the rib 24 is formed at the edge thereof.

That is, the fixing ring 30 is bonded to the rib 24 and then bonded so as not to be separated.

The lens unit 10 is assembled to the holder 40 in a screwed manner so as to be movable along a screw thread. A screw hole 42 corresponding to the threaded portion 14a of the barrel 14 penetrates through the center portion of the holder. It is formed, a plurality of screw coupling holes 44 are formed through the edge to be screwed to the PCB not shown.

In addition, the image sensor 50 on the image plane is located behind the holder 40.

The lens assembly configured as described above passes the lens 12 of the lens unit 10 to the image sensor 50 positioned at the rear of the holder to convert the analog signal into a digital signal, thereby displaying an image.

At this time, the focus of the lens 12 is adjusted to make the image appear accurately, and this process is called focusing or adjusting the resolution of the lens.

In general, lens focusing in a computer camera focuses by setting a standard distance of 40Cm to 100Cm, where a standard distance is a distance between a computer camera and a user when a user performs video communication.

However, when near field photography is required, such as when a computer camera is to be used for color code or scanning, the distance should be 10 cm or less. In order to adjust the distance in order to adjust the resolution as described above, the distance is adjusted by moving the lens forward by using the screw formed in the barrel while holding the protrusion of the knob and rotating the lens unit.

However, while holding the knob and adjusting the lens in the forward and backward direction, the inner circumference of the rib and the outer circumference of the cap are not only circular but also a slight gap between the rib and the cap causes the knob and the cap to be lost. The phenomenon occurs, and because of this, the distance adjustment is not made accurately, the camera operation is not made smoothly, there was a problem that lowers the customer satisfaction.

The present invention has been made in order to solve the problems described above, the object is to improve the assembly structure of the knob and the cap so that the phenomenon does not occur between the knob and the cap so that the focusing adjustment of the lens accurately It is to provide a lens assembly of a computer camera to be made.

Lens lens of the computer camera according to the present invention for achieving the above object is a screw portion is formed on the outer periphery of the barrel including the lens, the cap is coupled to the front, the outer peripheral portion of the cap is formed with a horizontal cut surface A lens exposure hole is formed in the center portion, and a lens-exposed hole is formed in the center portion thereof, and a cylindrical rib extends rearwardly, and an anti-rotation protrusion is formed at a portion corresponding to the cut surface of the cap at an inner circumference of the rib, and the anti-rotation protrusion is centered. The left and right sides include a knob formed with a protrusion that protrudes when the cap is assembled, and a fixing ring coupled to the knob to support the rear of the cap to prevent the lens unit coupled to the knob from being separated backwards. do.

1 is a front view showing an example of a general computer camera,

2 is a cross-sectional view showing a lens assembly of a conventional computer camera;

3 is a combined cross-sectional view showing a lens assembly of a computer camera according to the present invention;

Figure 4 is an exploded perspective view showing a knob, a lens unit and a fixing ring in the present invention,

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a front view of a computer camera to which the lens assembly according to the present invention is applied.

◎ Explanation of symbols for main part of drawing

1: body case 3: stand

30: retaining ring 32: assemblyman

34: coupling hole 40: holder

42: threaded hole 44: screwed hole

50: image sensor 100: lens unit

110: lens 120: barrel

120a: screw 130: cap

132: cutting surface 200: knob

210: lens exposure hole 212: projection

220: rib 222: projection

224: anti-rotation protrusion 226: coupling protrusion

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The same components as in the prior art will be described using the same names and symbols.

In general, a computer camera for video communication is configured such that the main body case is supported by a stand, and is used in connection with a PC through a USB cable.

A lens assembly is installed inside the main body case so that the lens is exposed to the front side, and an image plane on which the image sensor is mounted is provided at the rear of the lens assembly.

3 is a combined cross-sectional view showing a lens assembly of a computer camera according to the present invention, Figure 4 is an exploded perspective view showing a knob, a lens portion and a fixing ring in the present invention, Figure 5 is a cross-sectional view taken AA line of Figure 3, 6 is a front view of a computer camera to which the lens assembly according to the present invention is applied.

Referring to this, the lens assembly of the computer camera according to the present invention is composed of a lens unit 100 including a lens 110, a knob 200, a fixing ring 30 and a holder 40.

The lens unit 100 includes a barrel 120 including the lens 110 and a cap 130 having a larger diameter than the barrel and coupled to and bonded to the front outer circumference of the barrel.

A threaded portion 120a is formed at an outer circumference of the barrel 120, and a cut surface 132 is horizontally formed at a portion of the outer circumference of the cap 130.

The lens unit 100 is fitted to and supported by the knob 200 assembled to the front surface of the main body case 1.

The front surface of the knob 200 is formed through the lens exposure hole 210 in the center portion, the front edge is formed with a plurality of protrusions 212 protruding at a predetermined equal interval. This protrusion 212 is necessary when holding the knob 200 to rotate.

A cylindrical rib 220 extends rearward in the knob 200, and projections 222 protrude in three places at predetermined equal intervals on the rear surface of the rib 220, and an inner side of the rib 220. The perimeter has a diameter slightly larger than the outer perimeter of the cap 130.

And, the inner circumference of the rib 220, the anti-rotation protrusion 224 is formed protruding in a portion corresponding to the cutting surface 132 of the cap 130, the interference fit when the cap is assembled on the left and right around the anti-rotation projection. Coupling protrusion 226 is formed to be protruded.

Here, the number of the anti-rotation protrusion 224 and the coupling protrusion 226 can be variously applied, but the anti-rotation protrusion 224 is preferably formed three for stability, the coupling protrusion 226 is For stability, it is preferable to form two at each of the upper right and lower left.

In addition, the fixing ring 30 is provided to prevent the lens unit 100 coupled to the knob 200 from being separated.

An assembly hole 32 is formed through the center of the fixing ring 30 so as to fit around the outer circumference of the barrel 120, and a coupling hole 34 corresponding to the protrusion 222 of the rib 220 is formed at an edge thereof.

That is, the fixing ring 30 is bonded to the rib 220 so as not to be separated.

The lens unit 100 is fastened to the holder 40 in a screwed manner and assembled to be movable along the thread. A screw hole 42 corresponding to the threaded portion 120a of the barrel 120 penetrates through the center of the holder. It is formed, a plurality of screw coupling holes 44 are formed through the edge to be screwed to the PCB not shown.

In addition, the image sensor 50 on the image plane is located behind the holder 40.

Now, the assembly and action effects of the present invention thus constructed will be described.

First, assembling relationship is described, the cutting surface 132 of the cap 130 is adjusted to correspond to the anti-rotation protrusion 224 of the rib 220, and then the cap 130 is inserted into the rib 220. . At this time, the outer circumference of the cap 130 is in contact with the engaging projection 226 in the rib 220 is pressed while holding the engaging projection has excellent binding force.

Next, the fixing ring 30 is coupled to prevent the lens unit 100 from being separated from the knob 200. That is, the coupling hole 34 of the fixing ring 30 is coupled to the coupling protrusion 226 of the rib 220 so as to be caught on the rear surface of the cap 130, and then the fixing ring is fixed through bonding.

Then, the knob 200 is installed on the front of the camera case body, the barrel 120 is coupled to the front and rear direction through the threaded portion (120a) and the screw hole 42 corresponding to the holder 40, Holder 40 is fixed to the PCB not shown.

In addition, the image sensor 50 is located behind the holder 40 to form a subject passing through the lens 110. The image sensor converts analog signals into digital signals so that images are displayed.

The assembled lens assembly adjusts the focus of the lens 110 while moving the lens 110 in the front-rear direction by rotating the knob 200. This process is referred to as focusing or adjusting the resolution of the lens.

That is, when the knob 200 is rotated, the barrel 120 is rotated through the cap 130, and the barrel 120 is assembled with the holder 40 in a screw manner, so that the barrel 200 is loosened and tightened according to the rotating direction. It moves in the front and rear directions. This adjusts the resolution while the focal length of the lens 110 is adjusted.

In particular, the present invention, because the cutting surface 132 of the cap 130 is caught by the anti-rotation protrusion 224 of the rib 220 when rotating the barrel 120 through the knob 200, the knob 200 and the lens unit If the 100 is not missed, the distance adjustment of the lens 110 is always made correctly.

As described above, the present invention does not malfunction when adjusting the distance of the lens, so that the focusing adjustment is precisely performed, and the camera operates smoothly, thereby increasing the reliability of the product, thereby improving customer satisfaction.

As described above, the present invention has been illustrated and described in connection with specific embodiments, but it is common knowledge in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who has a can easily know.

As described above, the present invention improves the assembly method of the rib of the knob and the cap of the lens unit to prevent the phenomenon between the lens and the knob generated during lens focusing, and thus the focusing adjustment is performed accurately. This has the effect of improving consumer confidence in sex and products.

Claims (5)

The outer periphery of the barrel including the lens is formed with a screw portion, the cap is coupled to the front, the outer peripheral portion of the cap is a lens portion formed with a horizontal cut surface, A lens exposure hole is formed in the center portion, a cylindrical rib extends rearwards, and an anti-rotation protrusion is formed at a portion corresponding to the cut surface of the cap at an inner circumference of the rib, and the left and right sides are formed around the anti-rotation protrusion. The knob is formed with a protrusion protruding from the coupling so that the cap is assembled when the cap is assembled, And a fixing ring coupled to the knob and supporting the rear portion of the cap to prevent the lens portion coupled to the knob from being separated from the rear side. The holder of claim 1, wherein a screw hole corresponding to the threaded portion of the barrel is formed in the center portion thereof, and a plurality of screw coupling holes are formed in the edge portion thereof so as to be screwed to the PCB provided in the main body case of the camera. The lens assembly of the camera for a computer, characterized in that it comprises a image sensor located in the rear of the holder attached to the PCB. The lens assembly of claim 1, wherein the anti-rotation protrusions of the knob form three, and the coupling protrusions are formed on each of two upper and lower left and right sides for stability. The barrel including the lens is screwed to the holder and configured to be adjustable in the front-rear direction. The barrel is coupled to a knob installed on the front of the camera body case through a cap provided at the front to rotate together when the knob is rotated. In the lens assembly of a computer camera for adjusting the focusing distance of the lens, A portion of the outer circumference of the cap is formed with a horizontal cutting surface, and an inner circumference of the knob has an anti-rotation protrusion protruding from a portion corresponding to the cutting surface of the cap to allow the knob and the cap to rotate together. The lens assembly of the computer camera, characterized in that the coupling protrusion is formed on the left and right sides around the anti-rotation projection so that the cap can be assembled in the interference fit method. The lens assembly of claim 1, wherein the anti-rotation protrusions of the knob form three, and the coupling protrusions are formed on each of two upper and lower left and right sides for stability.