KR20100093778A - Motor for driving lens - Google Patents

Abstract

PURPOSE: A motor for driving lens is provided to prevent the generation of assembling defects in components and the change of the elastic force of a spring by being prevented from the inflow of solder. CONSTITUTION: A housing(120) is combined with a base(110). A magnet(140) is fixed to the housing. A bobbin(150) is elevatably installed inside the magnet. The inner circumference of the bobbin is combined with a lens. A coil(160) is combined with the outer circumference of the bobbin and elevates the bobbin by acting with the bobbin. The inner circumference of a spring(170) is combined with the bobbin, and the outer circumference of the spring is supported by the housing. The elevated bobbin is returned to an initial state. The lead wire of the coil is connected by a soldering process.

Description

Lens Driving Motor {MOTOR FOR DRIVING LENS}

The present invention relates to a motor for driving a lens.

Today, digital devices with built-in cameras and MP3 players have been developed and used according to the multifunctional trend of digital devices. In addition, the lens of the camera embedded in the digital device is automatically moved and adjusted by the lens driving device.

The lens driving device has a bobbin mounted to be liftable. A lens and a coil are respectively provided on the inner circumferential surface and the outer circumferential surface of the bobbin, and a magnet is provided on the outer side of the coil to face the coil.

Thus, when a current is applied to the coil, the bobbin is raised by the action of the coil and the magnet to raise the lens. The raised bobbin is lowered by a spring. The coil and the external power supply side are soldered to the spring, and the coil and the external power supply side are connected to each other via the spring.

When soldering the coil and external power to the spring, the solder melts and flows through the spring. At this time, when the solder flows to the inner portion of the spring and hardens, the elastic force of the spring is changed by the solder. Then, when other parts are contact-assembled to the portion of the spring to which the solder is attached, assembly failure occurs such that the other parts are inclined.

However, the conventional lens driving apparatus as described above has no means for preventing the solder from flowing over a predetermined portion of the spring. Therefore, there is a disadvantage in that the reliability is lowered because the change in the elastic force of the spring and the assembly failure of the parts occur.

The present invention has been made to solve the above problems of the prior art, an object of the present invention to provide a lens driving motor that can improve the reliability.

Lens driving motor according to the present invention for achieving the above object, the base and the housing coupled to each other; A magnet fixed to the housing; A bobbin mounted to the inside of the magnet so as to be elevated, and having a lens coupled to an inner circumferential surface thereof; A coil coupled to an outer circumferential surface of the bobbin and configured to raise the bobbin while working with the magnet to rise; An inner circumferential surface side is coupled to the bobbin and an outer circumferential surface side is supported by the housing side to return the raised bobbin to an initial state, and a spring to which the lead wire of the coil is soldered; And a means provided in the spring to prevent solder from flowing over a predetermined portion of the spring.

In the lens driving motor according to the present invention, the coil is soldered and the storage groove is recessed on the end side of the spring exposed to the outside of the base and the housing. Therefore, the solder does not flow into the spring portion inside the storage groove, there is no change in the elastic force of the spring by the solder and there is no assembly failure of the components by the solder. Therefore, the reliability of the product is improved.

Hereinafter, a lens driving motor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a lens driving motor according to an embodiment of the present invention.

As shown in the drawing, the base 110 and the housing 120 are provided with a through hole 113 and an access hole 123 formed to be coupled to each other to form a predetermined space therebetween.

Hereinafter, in referring to the plane and the direction of other components including the base 110, the plane and the direction toward the vertical direction upward of the base 110 "top and top", the plane and the direction toward the vertical bottom " Lower surface and lower side ".

The entrance hole 123 is formed on the upper surface of the housing 120.

A ring-shaped yoke 130 having an outer wall 131 and an upper plate 133 is fixed to an inner circumferential surface of the housing 120, and a ring-shaped magnet 140 is fixed to an inner circumferential surface of the yoke 130.

The inside of the yoke 130, that is, the inside of the magnet 140, the bobbin 150 is installed to be liftable to enter and exit the entrance hole 123. On the inner circumferential surface of the bobbin 150, a lens 200 for elevating in the same manner as the bobbin 150 is installed.

The winding coil 160 is fixed to the outer circumferential surface of the bobbin 150 to face the magnet 140. Thus, when a current is supplied to the coil 160, the coil 160 is raised by the electromagnetic force formed between the coil 160 and the magnet 140, thereby raising the bobbin 150 to lift the lens 200 Raise.

The bobbin 150 lifted by the electromagnetic force is lowered by the spring 170 installed on the upper side and the lower side of the yoke 130 and returned to the initial state. The spring 170 will be described later.

A ring-shaped spacer 180 having elasticity is installed between the base 110 and the lower surface of the yoke 130. The spacer 180 compensates for the tolerance due to the dimensional tolerances of the components assembled in the space formed by the base 110 and the housing 120 and the assembly errors generated during assembly.

The spring 170 according to the present embodiment will be described in detail with reference to FIGS. 1 to 2B. FIG. 2A is a perspective view of the spring shown in FIG. 1, and FIG. 2B is an enlarged view of portion “A” of FIG. 2A.

As shown, the spring 170 has first and second springs 171, 176 that are separated from each other.

The first spring 171 connects the first outer circumference 172, the first inner circumference 173, the first outer circumference 172, and the first inner circumference 173 positioned inside the first outer circumference 172. It has a plurality of first connections 174. The second spring 176 connects the second outer circumference 177, the second inner circumference 178, the second outer circumference 177, and the second inner circumference 178 positioned inside the second outer circumference 177. It has a plurality of second connecting portions 179.

The first spring 171 and the second spring 176 are formed in the same shape, one end side and the other end side of the first inner peripheral portion 173 and the one end side and the other end side of the second inner peripheral portion 178, respectively. They face away at a predetermined distance. At this time, the first inner peripheral portion 173 and the second inner peripheral portion 178 form the same circular shape as the bobbin 150.

The first inner circumference 173 and the second inner circumference 178 are respectively coupled to the bobbin 150, and the first outer circumference 172 and the second outer circumference 177 are disposed between the base 110 and the spacer 180. Inserted and supported respectively. The first outer circumference 172 and the second outer circumference 177 of the upper spring 170 are inserted and supported between the upper surface of the yoke 130 and the housing 120, respectively.

Thus, when a current is applied to the coil 160 to raise the bobbin 150, the first and second connectors 174 and 179 elastically deform, and when the current applied to the bobbin 150 is blocked, the first and second connectors By the elastic force of (174,179) is lowered to the initial state of the bobbin 150.

The spring 170 also functions to connect the coil 160 and an external power supply side. To this end, a positive lead wire of the coil 160 and an external (+) power supply side are soldered to one end of the first inner circumferential portion 173, and a coil 160 to one end of the second inner circumferential portion 178. The (-) lead wire of and the external (-) power supply side are soldered and connected.

When the lead wire of the coil 160 and the external power supply side are soldered to the spring 170, the solder melts and flows through the spring 170. At this time, if the solder flows over a predetermined portion of the spring 170 and hardens, various problems occur.

The spring 170 according to the present embodiment is provided with means for preventing the solder from flowing over a predetermined portion of the spring 170.

The means is formed in one end of the first inner peripheral portion 173 exposed to the outside of the base 110 and the housing 120 is soldered and connected to the (+) lead wire and the external (+) power supply side of the coil 160 The storage groove 173a and the (-) lead wire of the coil 160 and the external (-) power supply side are soldered and connected to one end of the second inner peripheral portion 178 exposed to the outside of the base 110 and the housing 120. It is provided with a storage groove 178a formed in the recess. Then, since the solder flowing through the spring 170 flows into the storage grooves 173a and 178a, the solder does not flow into the portion of the spring 170 inside the storage grooves 173a and 178a.

Both end portions of the storage grooves 173a and 178a may communicate with the outside of the first and second inner circumferences 173 and 178, respectively. The storage grooves 173a and 178a press half the first and second inner circumferences 173 and 178 to form about half of the thicknesses of the first and second inner circumferences 173 and 178, or the first and second circumferences. Half etching of the second inner peripheral parts 173 and 178 is formed by etching.

Reference numerals 173b and 178b of FIG. 2B denote locking grooves in which a lead wire of the coil 160 wound on the spring 170 and an external power supply side are inserted and caught.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Of course.

1 is a cross-sectional view of a lens driving motor according to an embodiment of the present invention.

FIG. 2A is a perspective view of the spring shown in FIG. 1. FIG.

2B is an enlarged view of a portion “A” of FIG. 2A.

Explanation of symbols on the main parts of the drawings

110: base 120: housing

130: York 140: magnet

150: bobbin 160: coil

170: spring

Claims (7)

Mutually coupled bases and housings; A magnet fixed to the housing; A bobbin mounted to the inside of the magnet so as to be elevated, and having a lens coupled to an inner circumferential surface thereof; A coil coupled to an outer circumferential surface of the bobbin and configured to raise the bobbin while working with the magnet to rise; An inner circumferential surface side is coupled to the bobbin and an outer circumferential surface side is supported by the housing side to return the raised bobbin to an initial state, and a spring to which the lead wire of the coil is soldered; And a means provided in the spring, the means for preventing solder from flowing over a predetermined portion of the spring. The method of claim 1, And the means is a storage groove recessed in an end side of the spring to which the coil is soldered. The method of claim 2, Both end sides of the storage groove is in communication with the lens outer motor, respectively. The method of claim 2, The storage groove is a lens driving motor formed in the portion of the spring exposed to the outside of the base and the housing. The method according to any one of claims 1 to 4, The spring for driving the lens is formed with a locking groove in which the lead wire of the coil wound around the spring is inserted. The method of claim 5, The storage groove is a lens driving motor formed by half piercing (Half Piercing). The method of claim 5, The storage groove is a lens driving motor formed by half etching (Half Etching).

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