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Lens unit

A lens unit, lens technology, applied in the direction of optical components, installation, optics, etc., can solve problems such as damage to the lens barrel 1

Inactive Publication Date: 2009-02-18
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the stress 5 concentrates on the step portion 4a that supports the lens 2a that was pressed in earlier, and the lens barrel 1 may be damaged.
Therefore, in the manufacturing steps of the existing lens unit, it is necessary to operate very carefully

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] figure 1 It is a sectional view showing the lens unit according to Embodiment 1 of the present invention. The lens unit of this embodiment includes: a lens barrel 7 having a through hole 6 , a first lens 8 a press-fitted into the through hole 6 , and a first lens 8 a that engages and fixes the outer peripheral end of the first lens 8 a into the through hole 6 . The stepped portion 9a, the second lens 8b that is press-fitted into the through hole 6 in the direction of the optical axis of the first lens 8a and has a larger diameter than the first lens 8a, and the outer peripheral end of the second lens 8b is engaged and fixed to the through hole. In the second step portion 9b. Wherein, a third stepped portion 10a is further provided between the first stepped portion 9a and the second stepped portion 9b. This lens unit is mainly used in compact solid-state imaging systems such as mobile phones with cameras.

[0033] The configuration of the lens unit according to Embod...

Embodiment approach 2

[0044] figure 2 It is a cross-sectional view showing a lens unit in Embodiment 2 of the present invention. The lens unit of this embodiment includes: a lens barrel having a through hole, a first lens 13a press-fitted into the through hole, a first stepped portion 15a for engaging and fixing the outer peripheral end of the first lens 13a into the through hole, The second lens 13b, which is larger in diameter than the first lens 13a, is pressed into the through hole in the direction of the optical axis 23 of the first lens 13a, and the outer peripheral end of the second lens 13b is engaged and fixed to the second step in the through hole. Section 15b. Among them, an inclined region 16 that expands from the side of the first lens 13a toward the side of the second lens 13b is provided.

[0045] The upper and lower end portions of the inclined region 16 may coincide with the end portions of the first stepped portion 15 a and the second stepped portion 15 b. At least one of the ...

Embodiment approach 3

[0049] image 3 It is a transverse sectional view showing a lens unit according to Embodiment 3 of the present invention, Figure 4 to represent image 3 A detailed view of the protrusion of the lens unit shown. Figure 5 for expressing in image 3 A transverse cross-sectional view of the configuration in which the protrusion of the lens unit is provided with an adhesive.

[0050] In Embodiment 1 described above, although not particularly shown, the shape of the inner wall of the through-hole 6 basically coincides with the shape of the outer periphery of the lenses 8a, 8b, and 8c as the way the lenses 8a, 8b, and 8c are press-fitted into the lens barrel 7. , the entire outer peripheral side of the lens is pressed against the inner wall of the through-hole during press-fitting.

[0051] On the other hand, in Embodiment 3, if image 3 As shown, a plurality of protruding portions 19 protruding inward are provided along the region 18 of the inner wall of the through hole to w...

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PUM

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Abstract

A lens unit, comprising a lens-barrel (7) having a through-hole (6), a first lens (8a) press-fitted into the through-hole (6), a first step part (9a) locking the outer peripheral end part of the first lens (8a) in the through-hole (6), a second lens (8b) press-fitted into the through-hole (6) in the optical axis direction of the first lens (8a) and having a diameter larger than that of the first lens (8a), and a second step part (9b) locking the outer peripheral end part of the second lens (8b) in the through-hole (6). Either of a third step part (10a) and a tilted area enlarging from the first lens side toward the second lens side is formed between the first step part (9a) and the second step part (9b).

Description

technical field [0001] The present invention relates to a lens unit in which a plurality of lenses are pressed and fixed in a lens barrel. Background technique [0002] In recent years, such as a mobile phone with a camera, the lens unit additionally installed with respect to the original phone function, such as Figure 6 As shown, the lenses 2a, 2b, 2c are integrated with the lens barrel 1 for mounting on the device body. [0003] Figure 6 In the lens barrel 1, a through hole 3 is provided. A plurality of lenses 2 a , 2 b , and 2 c are sequentially press-fitted into the through hole 3 . By engaging and fixing each lens 2a, 2b, 2c to each step part 4 provided in the through hole 3, the structure which limits the mutual distance between lenses is comprised. [0004] In conventional lens units, the number of steps is determined in accordance with the number of lenses constituting the lens unit. The diameter of the through hole 3 between adjacent stepped portions 4 is forme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/02
Inventor 野田俊成立畠直树辻川义彦上田智森仲克也
Owner PANASONIC CORP