TWI459065B - Lens module - Google Patents

Description

Lens device

The present invention relates to a lens device.

It has become increasingly popular to provide optical lens elements on handheld electronic devices. The combination of the lens and the lens mount of these optical lens elements is generally screwed. However, when the product is in mass production, the most common occurrence is that the screw connection between the lens and the lens mount is too loose or too tight, which affects the assembly precision between the lens and the lens mount. The reason why the screw connection is too loose or too tight depends on the manufacturing precision of the thread. When the accuracy of the thread is problematic, it is necessary to adjust or modify the mold for manufacturing the thread, which requires a large amount of adjustment or modification of the mold. Time and cost will have a considerable impact on the timeliness and benefits of mass production.

In view of this, it is necessary to provide a lens device that combines magnetic attraction.

The invention provides a lens device comprising: a lens element, a bracket and a plurality of magnetic elements. The lens element has a lens barrel and at least one lens that is received within the lens barrel. The top end and the bottom end of the lens barrel are respectively provided with a convex ring surrounding the lens barrel, and a support portion surrounding the outer side wall of the lens barrel is formed between the two convex rings. The bracket is disposed at the support portion and surrounds the lens barrel. The bracket includes two bracket bodies. The plurality of magnetic elements are respectively disposed between the joint faces of the two bracket bodies to adsorb the two bracket bodies together by magnetic force.

Compared with the prior art, the lens device of the invention eliminates the thread used in the fixing of the conventional lens barrel, so that the assembly of the lens barrel does not need to consider the combined torsion problem and improve the assembly yield.

10‧‧‧Lens device

12‧‧‧ lens elements

120‧‧‧Mirror tube

122‧‧‧ lenses

124‧‧‧ convex ring

126‧‧‧Injection hole

14‧‧‧ bracket

142‧‧‧ bracket body

144‧‧‧Support surface

146‧‧‧ joint surface

148‧‧‧ Groove

16‧‧‧Magnetic components

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic exploded view showing the structure of a lens apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic structural view of a bracket body of the lens device of FIG. 1. FIG.

3 is a schematic view of the bracket body of the lens device of FIG. 1.

4 is a schematic view showing the combination of the lens device of FIG. 1.

The present invention will be specifically described below with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, the lens assembly 10 of the present invention includes a lens element 12, a bracket 14 and a plurality of magnetic elements 16.

The lens element 12 has a barrel 120 and at least one lens 122. The lens 122 is disposed within the barrel 120. A peripheral edge of the outer end and the bottom end of the lens barrel 120 respectively extends outwardly along the radial direction of the lens barrel 120 to form a convex ring 124 surrounding the lens barrel 120. A circumferential mirror is formed between the two convex rings 124. The support portion of the outer side wall of the cylinder 120 is used to set the bracket 14.

The bracket 14 includes two bracket bodies 142. Each of the bracket bodies 142 includes a support surface 144 corresponding to the outer side wall support portion of the lens barrel 120, and an engagement surface 146 formed on opposite sides of the support surface 144. In this embodiment, the support surface 144 corresponds to the cylindrical outer wall of the lens barrel 120 and has a concave arcuate surface. The joint faces 146 are respectively parallel to the central axis of the lens barrel 120. Of course, the joint faces 146 may also be non-parallel to the central axis of the lens barrel 120, and only the joint faces 146 of each bracket body 142 can cooperate with each other. Just fine. The two bracket bodies 142 are joined to each other by the joint surface 146 to form a cylindrical structure through which the peripheral ends are closed, and the lens elements 12 are sandwiched between the two bracket bodies 142 by the two support surfaces 144. In order to stabilize the bond between the two bracket bodies 142, magnetic elements 16 (shown in FIG. 3) that can be attracted to each other are disposed between the two sets of joint faces 146 of the two bracket bodies 142, respectively. A recess 148 is defined in the joint surface 146 for embedding the magnetic element 16. The shape and arrangement of the grooves 148 can be arbitrarily set according to requirements, such as being disposed in a partial range of the joint surface 146 or filling the entire joint surface 146. In addition, the magnetic component 16 can be adhered to the recess 148 by adhesive. The support surfaces 144 of the two bracket bodies 142 are coupled to the lens barrel 120 after being coupled to each other, so that the support surface 144 is attached to the outer side wall of the lens barrel 120.

The magnetic element 16 is disposed between the two brackets 142 of the bracket 14 opposite to the bracket body 142. When the two bracket bodies 142 are mutually engaged, the magnetic elements 16 are magnetically attracted to each other to maintain the two bracket bodies 142 after being engaged. Stability. The shape of the magnetic element 16 matches the shape of the recess 148. In this embodiment, the groove 148 is rectangular, and the magnetic element 16 is a corresponding rectangular strip. The magnetic element 16 is embedded in the recess 148 to maintain the surface of the joint surface 146 flat.

Referring to FIG. 4, the bracket body 142 of the bracket 14 is coupled to the outer side wall of the lens barrel 120, and is located at a support portion between the two convex rings 124 at the top end and the bottom end of the lens barrel 120, so that the two bracket bodies 142 are The end abuts against the inner side of the collar 124, so that the lens element 12 is firmly held by the two opposing bracket bodies 142. The light incident hole 126 formed on the top end surface of the lens barrel 120 allows external light information to enter the lens barrel 120 through the entrance hole 126 for optical information transmission. The lens barrel 120 can open the mutually opposing brackets with a force greater than the magnetic force of the magnetic element 16 when any adjustment or correction is required. The body 142 is convenient for taking out the lens barrel 120.

In the lens device 10 of the present invention, the magnetic member 16 is attracted to each other, and the relative position of the lens member 12 and the bracket 14 is maintained by the convex ring 124 on the lens barrel 120, thereby omitting the problem of the torque generated by the screw connection method, and at the same time The lens device 10 has a simple structure, is easy to assemble, and has a low mold opening cost.

It should be noted that the above-described embodiments are merely preferred embodiments of the present invention, and those skilled in the art can make other changes within the spirit of the present invention. All changes made in accordance with the spirit of the invention are intended to be included within the scope of the invention.

10‧‧‧Lens device

12‧‧‧ lens elements

120‧‧‧Mirror tube

122‧‧‧ lenses

124‧‧‧ convex ring

126‧‧‧Injection hole

14‧‧‧ bracket

142‧‧‧ bracket body

144‧‧‧Support surface

146‧‧‧ joint surface

148‧‧‧ Groove

16‧‧‧Magnetic components

Claims (8)

A lens device includes a lens component, a bracket and a plurality of magnetic components, the lens component has a lens barrel and at least one lens, the lens is received in the lens barrel, and a top end and a bottom end of the lens barrel are respectively provided with a lens Surrounding the convex ring of the lens barrel, a support portion surrounding the outer side wall of the lens barrel is formed between the two convex rings, the bracket is disposed at the support portion and surrounds the lens barrel, the bracket includes two bracket bodies and the plurality of magnetic bodies The components are respectively disposed between the joint faces of the two bracket bodies to adsorb the two bracket bodies together by magnetic force. The lens device of claim 1, wherein the convex ring extends radially outward along a circumference of the periphery of the lens barrel, and the inner side of the convex ring respectively abuts both ends of the two bracket bodies. The lens device of claim 1, wherein the bracket body comprises a support surface corresponding to the support portion of the lens barrel, the opposite sides of the support surface are joint surfaces, and are interconnected with the support surface . The lens device of claim 3, wherein the support surface corresponds to a concave arcuate surface of the outer side wall of the lens barrel, the joint surfaces being planes parallel to the central axis of the lens barrel. The lens device of claim 3, wherein the two bracket bodies are joined to each other by a joint surface, thereby forming a cylindrical structure through which the peripheral ends are closed, and the lens element is supported by the support surface In the barrel structure. The lens device of claim 3, wherein the joint surface is provided with a groove for accommodating the magnetic element. The lens device of claim 6, wherein the groove is provided with a magnetic component that is adhesively disposed in the groove. The lens device of claim 7, wherein the shape of the magnetic element matches the shape of the groove on the joint surface, and the magnetic element is placed in the groove to maintain the surface of the joint surface smooth.