TWI449980B - Focus lens module - Google Patents

Description

Focus lens module

The present invention relates to the field of optical systems, and in particular, to a focus lens module.

With the rapid development of multimedia technology, digital cameras, camcorders and mobile phones with cameras are increasingly favored by consumers. While people are demanding higher image quality for digital cameras, camcorders and mobile phone cameras, Demand for products such as digital cameras, camcorders and mobile phones with cameras is also increasing. In a camera such as a digital camera, a video camera, and a mobile phone camera, the lens module is an indispensable component.

The camera module usually includes a lens barrel, a lens holder, an optical imaging element, and an image sensor. The optical imaging component is received in the lens barrel, the image sensor is disposed on the lens holder, and the optical imaging component and the image sensor are optically coupled by a cooperation between the lens barrel and the lens holder. As people's imaging quality requirements for camera modules have increased, the focus function has become one of the functions commonly found in camera modules. The existing focusing camera module uses a driving motor or a voice coil motor to drive the lens barrel or the lens holder to shift, thereby changing the distance between the lens barrel of the camera module and the lens holder to achieve focusing, however, the camera module is not only costly, but also Due to the existence of the drive motor or the voice coil motor, the entire lens module is large in size and complicated in structure, which cannot meet the demand for the lightness and thinness of the camera module.

In view of this, a focusing lens with low cost, simple structure and small space is provided. Modules are necessary.

A focusing lens module includes a lens holder, a lens barrel and an elastic component. The lens holder houses an image sensor and is provided with a plurality of sliding grooves extending axially along the lens holder. The lens barrel is received in the lens holder and houses an optical imaging element. The lens barrel has a plurality of sliders corresponding to the plurality of chutes of the lens holder, and the plurality of sliders pass through the plurality of chutes for sliding along the plurality of chutes. The elastic element is disposed between the lens holder and the lens barrel for providing elastic deformation along the axial direction of the lens holder, so that the plurality of sliders slide along the plurality of sliding slots to make the lens barrel opposite to the lens holder A displacement along the axial direction of the mirror mount occurs, thereby changing the distance between the image sensor and the optical imaging element.

The sliding groove of the focusing lens module of the technical solution extends along the axial direction of the lens holder, and the slider of the lens barrel moves along the sliding slot to change the relative position between the lens barrel and the lens holder. The elastic element prevents relative displacement of the lens barrel and the lens holder when it is out of focus. The lens barrel of the focus lens module provided by the technical solution can smoothly slide relative to the lens holder during the focusing process. The utility model has the advantages of simple structure, small occupied space, suitable for miniaturization of the current lens module, and low cost, and is particularly suitable for use in electronic products such as mobile phones.

10‧‧‧focus lens module

11‧‧‧Mirror seat

12‧‧‧Mirror tube

13‧‧‧Flexible components

14‧‧‧Optical imaging components

15‧‧‧Image Sensor

110‧‧‧ first body

112‧‧‧Second body

1100‧‧‧ first surface

1101‧‧‧ second surface

1102‧‧‧First containment chamber

1103‧‧‧ blind slot

1104‧‧‧ side

1105‧‧‧ bottom

1106‧‧‧through hole

1107‧‧‧ Protrusion

1108‧‧‧Fixed holes

1120‧‧‧Seat

1121‧‧‧Extension seat

1122‧‧‧ first end face

1123‧‧‧second end face

1124‧‧‧First inner surface

1125‧‧‧First outer surface

1126‧‧‧Second containment chamber

1127‧‧ ‧ chute

1128‧‧‧ first end

1129‧‧‧second end

1130‧‧‧Extension block

1131‧‧‧ fixed column

120‧‧‧Inner cylinder

121‧‧‧Outer cylinder

1200‧‧‧ third containment chamber

1201‧‧‧ external thread

1210‧‧‧Second inner surface

1211‧‧‧Second outer surface

1212‧‧‧ internal thread

1213‧‧‧4th containment chamber

1214‧‧‧ Slider

1215‧‧‧Operation lever

130‧‧‧Bottom

131‧‧‧Upper

FIG. 1 is an exploded view of a focus lens module according to an embodiment of the present technical solution.

2 is an exploded view of another perspective view of the focus lens module provided by the embodiment of the present technical solution.

FIG. 3 is a schematic structural diagram of a focus lens module according to an embodiment of the present technical solution.

4 is a cross-sectional view of a focus lens module according to an embodiment of the present technical solution.

FIG. 5 is a schematic structural diagram of a focus state of a focus lens module according to an embodiment of the present disclosure.

FIG. 6 is a cross-sectional view showing a focus state of a focus lens module according to an embodiment of the present technical solution.

The focus lens module of the present technical solution will be further described in detail below with reference to the accompanying drawings and embodiments.

Please refer to FIG. 1 to FIG. 3 , which is a focusing lens module 10 according to an embodiment of the present disclosure, which includes a lens holder 11 , a lens barrel 12 , an elastic member 13 , an optical imaging element 14 , and an image sensor 15 .

The lens holder 11 includes a first seat body 110 and a second seat body 112 that are connected to each other. The first seat body 110 is disposed coaxially with the second seat body 112.

The first seat body 110 can be a square having an opposite first surface 1100 and a second surface 1101. The first body 110 has a first receiving cavity 1102 for receiving the image sensor 15 near the first surface 1100 . The first seat body 110 is provided with a blind groove 1103 from the center of the second surface 1101 toward the second surface 1101. The blind slot 1103 can be circular with a connecting side 1104 and a bottom surface 1105. The first base 110 further has a through hole 1106 extending through the blind slot 1103 and the first receiving cavity 1102. The through hole 1106 is opened from the center of the bottom surface 1105 toward the first surface 1100. The second surface 1101 has a plurality of protrusions 1107 near the side surface 1104, and the plurality of protrusions 1107 are equiangularly distributed around the central axis of the lens holder 11. In this embodiment, the number of the protrusions 1107 is three, and each of the protrusions 1107 has a rectangular parallelepiped shape. The first base body 110 is further provided with a plurality of fixing holes 1108 from the second surface 1101 toward the first surface 1100. The plurality of fixing holes 1108 are also equiangularly distributed around the central axis of the lens holder 11. In this embodiment, the number of the fixing holes 1108 is three, and each of the fixing holes 1108 is circular.

The second base 112 is detachably coupled to the first base 110 , and includes a receiving seat 1120 and an extending seat 1121 .

The receiving seat 1120 is configured to receive the lens barrel 12, which may be a hollow cylinder. The receiving seat 1120 has a first end surface 1122, a second end surface 1123, a first inner surface 1124 and a first outer surface 1125. The first end surface 1122 is located near one side of the first base 110 and is in contact with the second surface 1101. The second end surface 1123 is opposite to the first end surface 1122 and is located away from one side of the first base body 110. The first inner surface 1124 is opposite to the first outer surface 1125 and is vertically connected between the first end surface 1122 and the second end surface 1123. The first inner surface 1124 encloses a second receiving cavity 1126 for receiving the lens barrel 12 . The receiving seat 1120 has a plurality of chutes 1127 corresponding to the number and position of the plurality of protrusions 1107. The plurality of chutes 1127 are equiangularly distributed around the central axis of the lens holder 11 near the first end surface 1122, and are adjacent to each other. Each of the chutes 1127 is a through hole penetrating the first inner surface 1124 and the first outer surface 1125 , and extends from the first end surface 1122 along the central axis of the lens holder 11 toward the second end surface 1123 . Each chute 1127 has an opposite first end 1128 and a second end 1129. The first end portion 1128 is located adjacent to the first end surface 1122 and has a shape corresponding to the protrusion 1107 of the first seat body 110 to cooperate with the protrusion 1107. The second end 1129 is located near the second end face 1123. Each position between the first end portion 1128 and the second end portion 1129 of the chute 1127 has a gradual change from the first seat body 110 in a direction parallel to the central axis of the lens holder. In this embodiment, corresponding to the plurality of protrusions 1107, the number of the plurality of chutes 1127 is also three.

The extension seat 1121 extends from the first outer surface 1125 of the receiving seat 1120 toward the central axis of the lens holder 11 near the first end surface 1122. In this embodiment, the extension seat 1121 includes three extension blocks that are equiangularly distributed around the central axis of the lens holder 11. 1130, each extension block 1130 is substantially triangular. The extension seat 1121 has a plurality of fixing posts 1131 near the second surface 1101 of the first seat body 110. The plurality of fixing posts 1131 are in one-to-one correspondence with the plurality of fixing holes 1108 for mating with the plurality of fixing holes 1108 to detachably couple the second body 112 to the first seat body 110.

The lens barrel 12 is received in the lens holder 11 and includes an inner cylinder 120 and an outer cylinder 121 fixed together.

The inner cylinder 120 has a third receiving cavity 1200 for the optical imaging element 14 having an external thread 1201.

The outer cylinder 121 is sleeved outside the inner cylinder 120 and is in contact with the first inner surface 1124 of the receptacle 1120 of the lens holder 11 . The outer cylinder 121 may have a hollow cylindrical shape and have opposite second inner surfaces 1210 and second outer surfaces 1211. The second inner surface 1210 has internal threads 1212. The internal thread 1212 is mated with the external thread 1201 for mating with the external thread 1201 to couple the inner cylinder 120 to the outer cylinder 121. The second inner surface 1210 encloses a fourth receiving cavity 1213 for receiving the inner cylinder 120. The second outer surface 1211 is for contacting the first inner surface 1124 of the lens holder 11. The outer cylinder 121 has a plurality of sliders 1214 each extending from the second outer surface 1211 in a direction perpendicular to the central axis of the lens barrel 12 away from the second inner surface 1210. The number, shape and distribution of the plurality of sliders 1214 correspond to the plurality of chutes 1127 of the lens holder 11, and the plurality of sliders 1214 pass through the plurality of chutes 1127 for sliding along the plurality of chutes 1127 Thereby, the lens barrel 12 is displaced in the axial direction of the lens holder 11 with respect to the lens holder 11. In this embodiment, the slider 1214 is cylindrical. Corresponding to the plurality of chutes 1127, the plurality of sliders 1214 are also three in number and are equiangularly distributed around the central axis of the barrel 12. The outer cylinder 121 further has a direction extending away from the lens barrel 12 along an axis perpendicular to the lens barrel 12 The operating lever 1215 is for the operator to grip and rotate relative to the central axis of the lens barrel 12 to drive the lens barrel 12 to rotate relative to the lens holder 11. In this embodiment, the operating rod 1215 is coupled to a side of the slider 1214 away from the second outer surface 1211.

Of course, the inner cylinder 120 and the outer cylinder 121 may be integrally formed, or the inner cylinder 120 may be omitted, and the optical imaging element 14 may be directly received in the outer cylinder 121.

The elastic member 13 is disposed between the lens holder 11 and the lens barrel 12 for providing elastic deformation along the axial direction of the lens holder 11 so that the plurality of sliders 1214 slide along the plurality of sliding grooves 1127. The lens barrel 12 is displaced in the axial direction of the lens holder 11 with respect to the lens holder 11, thereby changing the distance between the image sensor 15 and the optical imaging element 14. In this embodiment, the elastic member 13 is a spring. It has opposite lower ends 130 and upper ends 131. The lower end 130 is disposed on the bottom surface 1105 of the first base body 110, and the upper end 131 abuts against the lens barrel 12 of the second receiving cavity 1126 of the second base body 112. When the spring 13 is in a natural state, each slider 1214 is located at the second end 1129 of the corresponding chute 1127. Of course, the elastic element 13 can also be a spring piece, an elastic pad or other alternative.

The optical imaging element 14 is housed in the lens barrel 12 for optical imaging. The optical imaging element 14 can include an optical lens, a spacer ring, an infrared filter, and the like. In this embodiment, the optical imaging element 14 is an optical lens that is received in the third receiving cavity 1200 of the inner cylinder 120.

The image sensor 15 is received in the lens holder 11 for converting optical imaging of the optical imaging element 14 into an electronic signal. The image sensor 15 may include an integrated image sensor (Image Sensor) and an image signal processing chip (ISP Chip), and the photosensitive element may be a charge coupled device or a complementary metal oxide. semiconductor. The image sensor 15 can A ceramic leaded chip carrier (CLCC), a plastic leaded chip carrier (PLCC) or a chip scale package (CSP) is used. Specifically, the image sensor 15 is received in the first receiving cavity 1102 of the first seat body 110.

When the focus lens module 10 is assembled, the following steps may be taken: first, the inner cylinder 120 and the outer cylinder 121 are screwed together by the action between the external thread 1201 and the internal thread 1212, thereby forming a mirror. Cartridge 12.

Then, the plurality of sliders 1214 are passed through the second end 1129 of the plurality of chutes 1127, and the lens barrel 12 is disposed from the second body 112 adjacent to the first end surface 1122 into the second receiving cavity 1126 of the receiving seat 1120. The barrel 12 is coupled to the second base 112.

Again, the lower end 130 of the elastic member 13 is disposed on the bottom surface 1105 of the first seat body 110.

Finally, the second seat body 112 is fixed to the first seat body 110. Specifically, the lens barrel 12 is brought into contact with the upper end 131 of the elastic member 13, so that the first end portion 1128 of the sliding groove 1127 of the second base body 112 cooperates with the protrusion 1107 of the first base body 110, and the extension seat 1121 is The fixing post 1131 is inserted into the fixing hole 1108 of the first seat body 110 to obtain the focus lens module 10.

Referring to FIG. 1 , FIG. 3 to FIG. 6 , when the spring 13 of the focus lens module 10 is in a natural state, each of the sliders 1214 is located at the second end 1129 of the corresponding chute 1127 . When focusing, the operating lever 1215 can be moved along the sliding slot 1127 to the first end portion 1128. The lens barrel 12 is lowered by the operating rod 1215 and compresses the elastic member 13 to deform the elastic member 13 until the slider 1214 is fully loaded. In the protrusion 1107 of the first seat body 110, the distance between the lower end 130 and the upper end 131 of the elastic member 13 is also reduced. The relative distance between the lens barrel 12 and the lens holder 11 along the axial direction of the lens holder 11 is reduced, and the distance between the image sensor 15 and the optical imaging element 14 respectively received in the lens holder 11 and the lens barrel 12 is also reduced. Focus.

It can be understood that if the chute 1127 is configured as a stepped structure, the multi-stage focusing of the focus lens module 10 can also be achieved.

The sliding slot 1127 of the focusing lens module 10 of the present technical solution extends along the axial direction of the lens holder 11, and the slider 1214 of the lens barrel 12 moves along the sliding slot 1127 to realize the change of the relative position between the lens barrel 12 and the lens holder 11. . The elastic member 13 prevents relative displacement of the lens barrel 12 and the lens holder 11 when it is out of focus. The lens barrel 12 of the focus lens module 10 provided by the technical solution can smoothly slide relative to the lens holder 11 during focusing. The utility model has the advantages of simple structure, small occupied space, suitable for miniaturization of the current lens module, and low cost, and is particularly suitable for use in electronic products such as mobile phones.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧focus lens module

11‧‧‧Mirror seat

12‧‧‧Mirror tube

13‧‧‧Flexible components

14‧‧‧Optical imaging components

15‧‧‧Image Sensor

110‧‧‧ first body

112‧‧‧Second body

1100‧‧‧ first surface

1101‧‧‧ second surface

1103‧‧‧ blind slot

1104‧‧‧ side

1105‧‧‧ bottom

1106‧‧‧through hole

1107‧‧‧ Protrusion

1108‧‧‧Fixed holes

1120‧‧‧Seat

1121‧‧‧Extension seat

1122‧‧‧ first end face

1123‧‧‧second end face

1124‧‧‧First inner surface

1125‧‧‧First outer surface

1126‧‧‧Second containment chamber

1127‧‧ ‧ chute

1128‧‧‧ first end

1129‧‧‧second end

1130‧‧‧Extension block

1131‧‧‧ fixed column

120‧‧‧Inner cylinder

121‧‧‧Outer cylinder

1201‧‧‧ external thread

1210‧‧‧Second inner surface

1211‧‧‧Second outer surface

1212‧‧‧ internal thread

1213‧‧‧4th containment chamber

1214‧‧‧ Slider

1215‧‧‧Operation lever

130‧‧‧Bottom

131‧‧‧Upper

Claims (9)

A focusing lens module includes: a lens holder, the lens holder includes a first seat body and a second seat body respectively for receiving an image sensor and a lens barrel, wherein the first seat body has a plurality of fixing holes, An image sensor is disposed, the lens holder is provided with a plurality of sliding slots extending along the axial direction of the mirror base, the plurality of sliding slots are formed in the second seat body, and the second seat body has a plurality of fixing holes Corresponding plurality of fixing posts, the plurality of fixing holes cooperate with the plurality of fixing posts to fixedly connect the first base body and the second seat body; the lens barrel is received in the lens holder, and the lens barrel houses the optical imaging An element having a plurality of sliders corresponding to the plurality of chutes of the lens holder, the plurality of sliders passing through the plurality of chutes for sliding along the plurality of chutes; and an elastic member disposed on the Between the lens holder and the lens barrel, for providing elastic deformation along the axial direction of the lens holder, so that when the plurality of sliders slide along the plurality of sliding grooves, the lens barrel is displaced along the axial direction of the lens holder relative to the lens holder. , thereby changing the distance between the image sensor and the optical imaging element. The focus lens module of claim 1, wherein the plurality of chutes are equiangularly distributed around a central axis of the mirror mount. The focus lens module of claim 1, wherein the plurality of chutes extend helically around a central axis of the mirror mount. The focus lens module of claim 1, wherein the lens barrel has an operating rod extending in a direction away from the lens barrel along an axis perpendicular to the lens barrel, and the operating rod is used to drive the lens barrel Rotate relative to the mirror mount. The focus lens module of claim 4, wherein the operating rod is connected to a slider away from one end of the lens barrel. The focus lens module of claim 1, wherein the plurality of chutes have phases a first end portion and a second end portion, the first end portion is adjacent to the first seat body, the second end portion is away from the first seat body, and the first seat body further has a plurality of chutes corresponding to the plurality of chutes a plurality of protrusions, each of which cooperates with a first end of each of the chutes for carrying the slider. The focus lens module of claim 1, wherein the elastic member is a spring, and includes an opposite lower end and an upper end, wherein the lower end is disposed on the lens holder, and the upper end abuts against the lens barrel. The focus lens module of claim 1, wherein the lens barrel includes an inner cylinder and an outer cylinder fixed together, the inner cylinder for receiving an optical imaging element, the plurality of slides A block is disposed on the outer cylinder. The focus lens module of claim 8, wherein the inner cylinder and the outer cylinder are fixed by screwing.