KR101261263B1 - camera lens assembly - Google Patents

Abstract

The present invention relates to a semiconductor device comprising: a housing; A carrier accommodated in the housing in the housing in an optical axis direction; A lower magnetization plate disposed under the carrier in the housing; An upper magnetization plate disposed above the carrier in the housing; A magnetic body fixed to an outer circumferential surface of the carrier; And a coil fixed to an inner circumferential surface of the housing to face the magnetic body; As the current is applied to the coil, the carrier moves to a position in close contact with the upper or lower magnetization plate by the electromagnetic force of the coil and the magnetic body and the attraction force between the magnetic body and the upper or lower magnetization plate, and after the movement When the current applied to the coil is cut off, the carrier discloses a camera lens assembly configured to be fixed in close contact with the upper or lower magnetization plate. The camera lens assembly configured as described above may move the carrier in a solenoid manner, thereby implementing a macro shooting function with a simple structure and low cost.

Camera, Macro, Magnetic Plate, Magnetic Body, Coil

Description

Camera Lens Assembly {CAMERA LENS ASSEMBLY}

TECHNICAL FIELD The present invention relates to a camera lens assembly, and more particularly, to a camera lens assembly suitable for miniaturized devices and having a macro shooting function.

Recently, with the development of digital camera manufacturing technology, mobile communication terminals equipped with compact and lightweight camera lens assemblies are gradually invading the compact digital camera market. As the mounting of the camera lens assembly to a mobile communication terminal and the like has become common, efforts are now being made to improve the performance of such a camera lens assembly. For example, an auto focusing function for correcting a focal blur caused by a shooting distance of a subject when capturing an image has been installed in an expensive mobile communication terminal, but it is gradually being installed in an entry-level terminal.

On the other hand, the auto focus adjustment function is performed by retracting the lens-mounted barrel by using a voice coil motor and focusing according to the distance between the subject and the photographing device. To be implemented, not only the voice coil motor, but also wiring and control circuits for providing control signals must be provided. Therefore, it is difficult to mount the auto focus function in a miniaturized device such as a mobile communication terminal. In addition, even if the miniaturized mobile communication terminal is equipped with an auto focusing function due to the development of optical technology, an increase in manufacturing cost or product price is inevitable.

Therefore, a fixed focusing type camera lens assembly is mounted in a general entry type terminal. The fixed focus camera lens assembly has economic advantages in manufacturing cost or product price, but has a disadvantage in that it is not suitable for capturing high quality images because the focal length is not adjustable.

Moreover, as the use of mobile communication terminals has become popular and services such as video calls have become commercially available, camera lens assemblies are essentially mounted on mobile communication terminals. In addition, in order to improve the multimedia functions of the mobile communication terminal, users are demanding better camera functions. However, it is unrealistic to consider the miniaturization and the price of the terminal to mount the auto focus function to the camera lens assembly mounted in the mobile communication terminal.

Accordingly, the present invention is to provide a camera lens assembly inexpensive and macro shooting function is added.

Accordingly, the present invention, the housing; A carrier accommodated in the housing in the housing in an optical axis direction; A lower magnetization plate disposed under the carrier in the housing; An upper magnetization plate disposed above the carrier in the housing; A magnetic body fixed to an outer circumferential surface of the carrier; And a coil fixed to an inner circumferential surface of the housing to face the magnetic body;

As the current is applied to the coil, the carrier moves to a position in close contact with the upper or lower magnetization plate by the electromagnetic force of the coil and the magnetic body and the attraction force between the magnetic body and the upper or lower magnetization plate, and after the movement When the current applied to the coil is cut off, the carrier discloses a camera lens assembly configured to be fixed in close contact with the upper or lower magnetization plate.

At this time, the upper end of the housing is provided with a removable cover member, the upper magnetizing plate is preferably fixed to the inner surface of the cover member.

In addition, the lower magnetization plate is preferably fixed to the inner bottom surface of the housing.

In addition, the carrier is moved back and forth between the upper magnetization plate and the lower magnetization plate.

Meanwhile, an opening for installing an infrared filter or an image sensor may be formed on the bottom surface of the housing.

The camera lens assembly may further include a barrel that is screwed to the inner circumferential surface of the carrier, and at least one lens may be installed on the barrel.

The camera lens assembly may further include guide means provided between the carrier and the housing to limit rotation of the carrier and to guide the forward and backward movement of the carrier, wherein the guide means includes: A guide rail formed on an outer circumferential surface of the carrier or an outer circumferential surface of the magnetic body; And an inner circumferential surface of the housing or a portion of the inner circumferential surface of the coil is recessed to form a guide groove in which the rail is accommodated.

On the other hand, the coil and the magnetic body may be produced in a columnar shape having a cylindrical or polygonal cross-sectional shape, respectively.

The camera lens assembly configured as described above may move the carrier in a solenoid manner, thereby implementing a macro shooting function with a simple structure and low cost. In addition, since the carrier is fixed to a certain position by using the magnetization plate, the carrier can be held at a fixed position even without consuming additional power. Therefore, even if the camera lens assembly with the macro shooting function is added to the miniaturized terminal, there is an advantage that can be manufactured at low cost.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 and 2 show a camera lens assembly 100 according to a preferred embodiment of the present invention, respectively.

The camera lens assembly 100 according to the preferred embodiment of the present invention accommodates the carrier 102 in a housing 101 so as to move forward and backward, and fixes the magnetic body 121 on the outer circumferential surface thereof and the upper end of the housing 101. The magnetization plates 131 and 133 are disposed at the lower end, respectively. At this time, the carrier 102 is located at a point in close contact with the upper magnetization plate or the lower magnetization plate (131, 133) by the attraction force between the magnetic body 121 and the magnetization plate (131, 133). In addition, the camera lens assembly 100 arranges the coil 123 on the inner circumferential surface of the housing 101 to adjust the position of the carrier 102. When a current is applied to the coil 123, the magnetic body 121 and the carrier 102 move forward and backward by the electromagnetic force generated between the coil 123 and the magnetic body 121 so that the magnetization plates 131 and 133 may move. The carrier 102 moves to a position in close contact with the magnetization plates 131 and 133 that are closer to each other, and even after the current applied to the coil 123 is blocked, the magnetic material and the magnetization plate 131, By the attractive force between the 133, the carrier 102 is fixed in close contact with one of the magnetization plate (131, 133).

The housing 101 has an accommodation space 111 for receiving the carrier 102, the upper / lower magnetization plates 133 and 131, the coil 123, and the like, and an upper end thereof is a removable cover member 103. Consists of In addition, the lower end of the housing 101 is provided with another accommodation space (hereinafter referred to as "accommodating groove") 115 to install an image sensor (not shown). The accommodation space 111 and the accommodation groove 115 are separated by separate partitions, and the opening 113 is formed to penetrate through the accommodation groove 115 from the bottom surface of the accommodation space 111. An infrared filter or an image sensor is disposed in the opening 113. Preferably, an infrared filter is disposed in the opening 113, and the image sensor is located in the receiving groove 115.

The cover member 103 is configured to detach a portion of the upper end of the housing 101 so that the carrier 102 and the like can be easily assembled to the housing 101, and a window providing a photographing path has an optical axis direction. It is formed to penetrate along.

The carrier 102 has a thread 129 formed on its inner circumferential surface to provide a means for assembling a barrel provided with at least one lens, and is accommodated in the housing 101 so as to move forward and backward along the optical axis direction. At this time, in order to limit the rotation of the carrier 102 and to allow only the forward and backward movement, a guide means may be provided between the outer circumferential surface of the carrier 102 and the inner circumferential surface of the housing 101.

In this embodiment, the configuration in which the housing 101 and the carrier 102 are formed in a cylindrical shape is disclosed, but by forming a plane facing each other on the inner circumferential surface of the housing 101 and the outer circumferential surface of the carrier 102, Guide means can be constructed. In addition, the housing 101 and the carrier 102 may be formed in a columnar shape having a polygonal cross section, respectively, to form a structure for guiding the retreat movement while limiting the rotation of the carrier 102. In addition, since the magnetic body 121 and the coil 123 are interposed between the housing 101 and the carrier 102, the magnetic body 121 is independent of the shape of the housing 101 and the carrier 102. ) And the coil 123 may be manufactured in a columnar shape having a polygonal cross section.

As will be described below, in the present embodiment as the guide means, the magnetic body 121 and the coil 123 are manufactured in a cylindrical shape, respectively, the guide rail 125 and the guide to the magnetic body 121 and the coil 123, respectively. The configuration in which the groove 127 is formed is disclosed, and the guide means may be changed in various forms.

The magnetic body 121 has a cylindrical shape and is fixed to the outer circumferential surface of the carrier 102, and the guide rail 125 extending in the optical axis direction protrudes from the outer circumferential surface. The coil 123 is fixed to an inner circumferential surface of the housing 101, and a guide groove 127 extending in the optical axis direction is formed on the inner circumferential surface thereof. When the carrier 102 is installed in the housing 101, the guide rail 125 is disposed in the guide groove 127, whereby the carrier 102 has limited rotation in the housing 101. Only the retreat movement becomes possible. Meanwhile, an example in which the guide rails 125 and the guide grooves 127 are formed one by one is disclosed, but the number thereof may be variously changed.

The upper magnetization plate 133 and the lower magnetization plate 131 are disposed to face each other with the carrier 102 therebetween. More specifically, the upper magnetization plate 133 is attached to the inner surface of the cover member 103 to face the top surface of the carrier 102, the lower magnetization plate 131 of the housing 101 It is attached to the bottom surface and faces the bottom surface of the carrier 102. At this time, the distance between the upper / lower magnetization plate (133, 131) is set larger than the length of the carrier 102 along the optical axis direction, so that the carrier 102 is the upper / lower magnetization plate (133, 131) You will move forward and backward.

If no external force is applied, the carrier 102 will remain in close contact with the magnetization plate closer to the upper / lower magnetization plates 133 and 131. This is due to the attraction between the magnetic body 121 disposed on the outer circumferential surface of the carrier 102 and the upper or lower magnetization plates 133 and 131.

2 illustrates an initial state of the camera lens assembly 100. In the initial state, the camera lens assembly 100 is set to a normal photographing mode such that the carrier 102 is in close contact with the lower magnetization plate 131. Stay intact. At this time, although the attraction force is also acting between the upper magnetization plate 133 and the magnetic body 121, because the distance between the lower magnetization plate 131 and the magnetic body 121 is closer and the attraction between them is stronger. The carrier 102 may maintain a close contact with the lower magnetization plate 131.

As such, when the camera lens assembly 100 is in the normal photographing mode, the camera lens assembly 100 operates in the same manner as the camera lens assembly of the conventional fixed focus method.

On the other hand, when the primary current is applied to the coil 123, the electromagnetic force generated between the coil 123 and the magnetic body 121 is a force for moving the carrier 102 in the direction of the upper magnetization plate 133 Will act as. At this time, when the sum of the attraction force between the upper magnetization plate 133 and the magnetic body 121 and the electromagnetic force is greater than the attraction force between the lower magnetization plate 131 and the magnetic body 121, the carrier 102 is the upper magnetization plate. The camera lens assembly 100 is set to a macro shooting mode by moving to a position in close contact with 133.

After the carrier 102 moves to a position in close contact with the upper magnetization plate 133, the carrier (unless a secondary current is applied in the reverse direction of the current applied to the coil 123). 102 is maintained in close contact with the upper magnetization plate 133. When the carrier 102 is in close contact with the upper magnetization plate 133, the focal length of the camera lens assembly 100 may be adjusted to 5 cm or less, thereby allowing ultra-short distance photography, that is, macro photography.

In the macro photography mode, when a secondary current is applied to the coil 123, the electromagnetic force generated between the coil 123 and the magnetic body 121 may cause the carrier 102 to move toward the lower magnetization plate 131. It acts as a moving force. In this case, when the sum of the attraction force and the electromagnetic force between the lower magnetization plate 131 and the magnetic body 121 is greater than the attraction force between the upper magnetization plate 133 and the magnetic body 121, the carrier 102 is the lower magnetization plate. The camera lens assembly 100 is set back to the normal photographing mode by moving to a position in close contact with 131.

As a result, the camera lens assembly 100 is capable of taking close-up photography separately from the normal photographing mode. However, the camera lens assembly 100 has a simple structure and low manufacturing cost, and satisfies various requirements of users.

In the foregoing detailed description of the present invention, specific embodiments have been described. However, it will be apparent to those skilled in the art that various modifications can be made without departing from the scope of the present invention.

1 is an exploded perspective view showing a camera lens assembly according to a preferred embodiment of the present invention;

2 is a cross-sectional view showing a state in which the camera lens assembly shown in Figure 1 assembled.

Claims (9)

In the camera lens assembly, housing; A carrier accommodated in the housing in the housing in an optical axis direction; A lower magnetization plate disposed under the carrier in the housing; An upper magnetization plate disposed above the carrier in the housing; A magnetic body fixed to an outer circumferential surface of the carrier; A coil fixed to an inner circumferential surface of the housing to face the magnetic body; A guide rail formed on an outer circumferential surface of the carrier or an outer circumferential surface of the magnetic body; And An inner circumferential surface of the housing or a portion of the inner circumferential surface of the coil is recessed to receive the guide rail to limit the rotation of the carrier and to provide a guide groove for guiding the forward and backward movement of the carrier; As the current is applied to the coil, the carrier moves to a position in close contact with the upper or lower magnetization plate by the electromagnetic force of the coil and the magnetic body and the attraction force between the magnetic body and the upper or lower magnetization plate, and after the movement And when the current applied to the coil is cut off, the carrier is fixed in close contact with the upper or lower magnetization plate. The method according to claim 1, A detachable cover member is provided at an upper end of the housing, and the upper magnetization plate is fixed to an inner surface of the cover member. The camera lens assembly of claim 1, wherein the lower magnetization plate is fixed to an inner bottom surface of the housing. The camera lens assembly of claim 1, wherein the carrier moves back and forth between the upper and lower magnetization plates. The camera lens assembly of claim 1, wherein an opening for installing an infrared filter or an image sensor is formed in a bottom surface of the housing. The camera lens assembly of claim 1, further comprising a barrel screwed into an inner circumferential surface of the carrier, wherein the barrel is provided with at least one lens. delete delete The camera lens assembly of claim 1, wherein the coil and the magnetic body each have a columnar shape having a cylindrical or polygonal cross section.

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