CN217879776U - Lens unit - Google Patents
Lens unit Download PDFInfo
- Publication number
- CN217879776U CN217879776U CN202221623008.XU CN202221623008U CN217879776U CN 217879776 U CN217879776 U CN 217879776U CN 202221623008 U CN202221623008 U CN 202221623008U CN 217879776 U CN217879776 U CN 217879776U
- Authority
- CN
- China
- Prior art keywords
- lens
- pressing member
- lens barrel
- barrel
- lens unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a lens unit. The movement and inclination of the lens in the radial direction can be suppressed, and good optical characteristics can be maintained. The lens unit has: a first lens having an inclined surface formed on the outer side in the radial direction of the front lens surface and an abutting surface formed on the outer side in the radial direction of the rear lens surface; and a lens barrel that holds the lens. The lens barrel includes a first support portion having a support surface capable of coming into contact with the contact surface of the first lens. The lens unit has a first pressing member that presses the first lens toward the support surface of the lens barrel. The first pressing member includes an abutting portion having a pressing surface capable of abutting against the inclined surface of the first lens. The contact portion of the first pressing member and the first support portion of the lens barrel are arranged in the direction of the optical axis.
Description
Technical Field
The present invention relates to a lens unit, and more particularly to a lens unit having a lens and a lens barrel holding the lens.
Background
Generally, a lens unit incorporated in an imaging device includes: a lens; a lens barrel that holds a lens; and a fixing member that presses and fixes the lens to the lens barrel (see, for example, patent document 1). In such a lens unit, it is considered that the lens moves relative to the lens barrel when an impact is applied by a fall of the image pickup apparatus or an external force. For example, in a conventional lens unit, since the fixing member presses the lens on a plane perpendicular to the optical axis, the lens is easily moved in the radial direction with respect to the lens barrel in the case where an impact is applied. In addition, in the conventional lens unit, since the portion of the lens held by the lens barrel is located radially inward of the portion of the lens pressed by the fixing member, a moment is likely to act on the lens, and the lens is likely to tilt with respect to the lens barrel when an impact is applied. In this way, if the lens barrel is moved or tilted in the radial direction with respect to the lens barrel, damage to the lens barrel and deterioration in optical characteristics become problems.
Patent document 1: japanese patent laid-open No. 2020-24388
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a lens unit capable of suppressing movement and inclination of a lens in a radial direction, and maintaining good optical characteristics.
The utility model discloses a first mode provides a camera lens unit, its characterized in that, this camera lens unit has: a lens having a first lens surface, an inclined surface formed on an outer side of the first lens surface in a radial direction, a second lens surface located on an opposite side of the first lens surface along an optical axis, and an abutment surface formed on an outer side of the second lens surface in the radial direction; a lens barrel that holds the lens and includes a support portion having a support surface that can be brought into contact with the contact surface of the lens; and a pressing member that presses the lens toward the support surface of the lens barrel, the pressing member including an abutting portion having a pressing surface that can abut against the inclined surface of the lens, the abutting portion of the pressing member and the support portion of the lens barrel being arranged in a direction of the optical axis.
The lens unit according to the second aspect of the present invention is characterized in that, in the lens unit according to the first aspect, the lens unit further includes a seal member, and the seal member is disposed in the lens barrel in a radial direction of the support portion.
A lens unit according to a third aspect of the present invention is the lens unit according to the second aspect, wherein the lens barrel further includes a flange portion located inside a radial direction of the seal member, the seal member is disposed in a concave portion, and the concave portion is formed between the support portion and the flange portion of the lens barrel.
A fourth aspect of the present invention is the lens unit of the third aspect, wherein the lens barrel has a flange portion and the lens has a gap formed between the abutting surfaces.
A fifth mode of the present invention is characterized in that, in the lens unit according to any one of the first to fourth modes, the lens barrel has an inner peripheral surface for fitting the outer peripheral surface of the abutting portion of the pressing member.
A sixth mode of the present invention is characterized in that, in the lens unit of the fifth mode, the outer peripheral surface of the lens is fitted into the inner peripheral surface of the lens barrel.
A seventh mode of the present invention is characterized in that, in the lens unit according to any one of the first to fourth modes, the pressing member further includes a threaded portion formed with an external thread, and the lens barrel has an internal thread portion for the external thread screw-engagement of the threaded portion of the pressing member.
Drawings
Fig. 1 is a sectional view showing a lens unit according to an embodiment of the present invention.
Fig. 2A is a front partially exploded perspective view of the lens unit shown in fig. 1.
Fig. 2B is a rear partially exploded perspective view of the lens unit shown in fig. 1.
Description of the reference symbols
1: a lens unit; 11: a first lens; 12: a second lens; 13: a third lens; 14: a fourth lens; 15: a fifth lens; 20: a lens barrel; 21: a first inner peripheral surface; 22: a second inner peripheral surface; 23: a third inner peripheral surface; 24: a fourth inner peripheral surface; 25: a first support section; 26: a flange portion; 27: a second support portion; 28: a recess; 31: a first pressing member; 32: a second pressing member; 33: a third pressing member; 40: a spacer; 41: an aperture member; 50: o-rings (sealing members); 111: a front lens face (first lens face); 112: an inclined surface; 113: a rear lens face (second lens face); 114: an abutting surface; 115: an outer peripheral surface; 201 to 203: an internal thread portion; 251: a bearing surface; 311: pressing the face; 312: an abutting portion; 313: a threaded portion; 314: an outer peripheral surface; p: an optical axis.
Detailed Description
Hereinafter, an embodiment of the lens unit of the present invention will be described in detail with reference to fig. 1 to 2B. In fig. 1 to 2B, the same or corresponding components are denoted by the same reference numerals, and redundant description thereof is omitted. In fig. 1 to 2B, the scale and size of each component are exaggerated, and some components may be omitted. In the following description, unless otherwise specified, terms such as "first" and "second" are used only for distinguishing constituent elements from each other, and do not indicate a specific order or sequence.
Fig. 1 is a sectional view showing a lens unit 1 according to an embodiment of the present invention. As shown in fig. 1, the lens unit 1 of the present embodiment includes 5 lenses 11 to 15, a lens barrel 20 that holds the lenses 11 to 15, a first pressing member 31, a second pressing member 32, a third pressing member 33, a spacer 40 disposed between the second lens 12 and the third lens 13, and a diaphragm member 41. In the present embodiment, for convenience, the-X direction in fig. 1 is referred to as "front" or "front", and the + X direction is referred to as "rear" or "rear".
The lens barrel 20 has: a first inner peripheral surface 21 to which the outer peripheral surface 115 of the first lens 11 is fitted; a second inner peripheral surface 22 having a diameter smaller than that of the first inner peripheral surface 21, the second inner peripheral surface 22 being fitted with outer peripheral surfaces of the second lens 12, the spacer 40, and the diaphragm member 41; a third inner peripheral surface 23 having a diameter smaller than that of the second inner peripheral surface 22, the third inner peripheral surface 23 being fitted with the outer peripheral surface of the third lens 13; and a fourth inner peripheral surface 24 having a diameter larger than that of the third inner peripheral surface 23, the fourth inner peripheral surface 24 being fitted with the outer peripheral surfaces of the fourth lens 14 and the fifth lens 15, respectively. In addition, the lens barrel 20 has: a first support portion 25 located behind the first lens 11; a flange portion 26 formed radially inward of the first support portion 25; and a second support portion 27 located between the third inner peripheral surface 23 and the fourth inner peripheral surface 24.
A female screw portion 201 to which a male screw (not shown) formed on the outer periphery of the third pressing member 33 is screwed is formed on the inner peripheral surface of the + X direction side end portion of the lens barrel 20. The third pressing member 33 presses the fifth lens 15 in the-X direction by screwing the male screw of the third pressing member 33 into the female screw portion 201 of the lens barrel 20, whereby the fifth lens 15 presses the fourth lens 14 toward the second support portion 27.
A female screw 202 that is screwed into a male screw (not shown) formed on the outer periphery of the second pressing member 32 is formed on the inner peripheral surface of the flange portion 26 of the lens barrel 20. By screwing the male screw of the second pressing member 32 into the female screw portion 202 of the lens barrel 20, the second pressing member 32 presses the second lens 12 in the + X direction, whereby the second lens 12 presses the spacer 40, the diaphragm member 41, and the third lens 13 toward the second support portion 27.
An O-ring 50 (sealing member) for sealing an inner space of the lens barrel 20 is disposed radially inward of the first support portion 25 of the lens barrel 20. Such a sealing member may be disposed between the outer peripheral edge of the first lens 11 and the first inner peripheral surface 21 of the lens barrel 20, for example, but in this case, it is considered that the outer peripheral edge of the first lens 11 is caught by the sealing member at the time of assembly to damage the sealing member, which results in a decrease in the sealing performance of the sealing member. In contrast, in the present embodiment, the O-ring 50 as the sealing member is not disposed between the outer peripheral edge of the first lens 11 and the first inner peripheral surface 21 of the lens barrel 20, but disposed behind the first lens 11 and radially inward of the first support portion 25 of the lens barrel 20, and therefore the outer peripheral edge of the first lens 11 is not hooked by the O-ring 50 during assembly, and the O-ring 50 is not easily damaged. Therefore, the sealing performance of the O-ring 50 can be maintained satisfactorily.
Fig. 2A is a front partially exploded perspective view of the lens unit 1, and fig. 2B is a rear partially exploded perspective view. As shown in fig. 2A and 2B, the first lens 11 includes a front lens surface 111 (first lens surface), an inclined surface 112 formed on the radially outer side of the front lens surface 111, a rear lens surface 113 (second lens surface) located on the opposite side of the front lens surface 111 along the optical axis P, and an abutment surface 114 formed on the radially outer side of the rear lens surface 113. The contact surface 114 in the present embodiment extends perpendicularly to the optical axis P.
The first support portion 25 of the lens barrel 20 has a support surface 251 that abuts against the abutment surface 114 of the first lens 11. As shown in fig. 2A and 2B, the first pressing member 31 is an annular member that presses the first lens 11 against the supporting surface 251 of the lens barrel 20. The first pressing member 31 includes: a contact portion 312 having a pressing surface 311 that can contact the inclined surface 112 of the first lens 11; and a screw portion 313 having a male screw (not shown) formed on an outer periphery thereof.
A female screw portion 203 to be screwed with the male screw of the screw portion 313 of the first pressing member 31 is formed on the inner peripheral surface of the end portion on the-X direction side of the lens barrel 20. By screwing the male screw of the screw portion 313 of the first pressing member 31 into the female screw portion 203 of the lens barrel 20, the pressing surface 311 of the abutting portion 312 of the first pressing member 31 abuts against the inclined surface 112 of the first lens 11 to press the first lens 11 in the + X direction, whereby the abutting surface 114 of the first lens 11 is supported by the supporting surface 251 of the first supporting portion 25 of the lens barrel 20. In this way, the first lens 11 can be reliably pressed toward the first support portion 25 by screwing the threaded portion 313 of the first pressing member 31 into the female thread portion 203 of the lens barrel 20.
In the present embodiment, since the pressing surface 311 of the contact portion 312 of the first pressing member 31 contacts the inclined surface 112 of the first lens 11 to press the first lens 11, the pressing force of the first pressing member 31 is converted into a radial force and acts on the first lens 11. Therefore, the first lens 11 is constantly applied with a force in the radial direction over the entire circumference, and even when an impact is applied to the lens unit 1, the first lens 11 is less likely to move in the radial direction.
As shown in fig. 1 and 2A, a recess 28 extending in the circumferential direction is formed between the first support portion 25 and the flange portion 26 of the lens barrel 20, and the O-ring 50 is disposed in the recess 28. Therefore, the flange portion 26 of the lens barrel 20 is located radially inward of the O-ring 50. Therefore, even if a force acts on the O-ring 50 from the radially outer side toward the radially inner side due to water pressure or the like, the O-ring 50 is supported by the flange portion 26 of the lens barrel 20, and the O-ring 50 can be prevented from coming off.
Here, as shown in fig. 1, the contact portion 312 of the first pressing member 31 and the first support portion 25 of the lens barrel 20 are arranged in the direction of the optical axis P. Thereby, the portion of the first lens 11 pressed by the first pressing member 31 and the portion of the first lens 11 supported by the first support portion 25 of the lens barrel 20 are positioned on the same line along the direction of the optical axis P. Therefore, the first lens 11 is less likely to generate moment or bending stress due to the pressing force of the first pressing member 31, and the first lens 11 is less likely to tilt even when an impact is applied to the lens unit 1.
As described above, in the present embodiment, since the pressing surface 311 of the contact portion 312 of the first pressing member 31 contacts the inclined surface 112 of the first lens 11 to press the first lens 11, the first lens 11 is less likely to move in the radial direction even when an impact is applied to the lens unit 1. Further, since the contact portion 312 of the first pressing member 31 and the first support portion 25 of the lens barrel 20 are arranged in line in the direction of the optical axis P, the first lens 11 is less likely to tilt even when an impact is applied to the lens unit 1. As described above, according to the present embodiment, since the movement and inclination of the first lens 11 in the radial direction can be suppressed, the optical characteristics of the lens unit 1 can be maintained satisfactorily.
Here, the front surface 261 of the flange portion 26 of the lens barrel 20 is separated from the contact surface 114 of the first lens 11, and a gap is formed between the flange portion 26 of the lens barrel 20 and the contact surface 114 of the first lens 11. In this way, by forming a gap between the flange portion 26 of the lens barrel 20 and the contact surface 114 of the first lens 11, the contact surface 114 of the first lens 11 and the first support portion 25 of the lens barrel 20 reliably come into contact, and therefore, the inclination of the first lens 11 can be more effectively suppressed.
In the present embodiment, both the outer peripheral surface 314 of the contact portion 312 of the first pressing member 31 and the outer peripheral surface 115 of the first lens 11 are fitted to the first inner peripheral surface 21 of the lens barrel 20. In this way, by fitting the contact portion 312 of the first pressing member 31 and the first lens 11 to the same inner circumferential surface 21, the first pressing member 31 and the first lens 11 can be arranged coaxially with high accuracy. It is not always necessary to fit the contact portion 312 of the first pressing member 31 and the first lens 11 to the same inner circumferential surface 21, and only one of the contact portion 312 of the first pressing member 31 and the first lens 11 may be fitted to the inner circumferential surface of the lens barrel 20, or the contact portion 312 of the first pressing member 31 and the first lens 11 may be fitted to different inner circumferential surfaces.
In the present embodiment, the inclined surface 112 of the first lens 11 is a conical surface whose outer diameter gradually increases in the + X direction, and correspondingly, the pressing surface 311 of the contact portion 312 of the first pressing member 31 is a conical surface whose inner diameter gradually increases in the + X direction, but the shapes of the inclined surface 112 of the first lens 11 and the pressing surface 311 of the contact portion 312 of the first pressing member 31 are not limited thereto. For example, the outer diameter of the inclined surface 112 of the first lens 11 and the inner diameter of the pressing surface 311 of the contact portion 312 of the first pressing member 31 may be gradually decreased toward the + X direction. The inclined surface 112 and the pressing surface 311 may be formed of a curved surface other than a conical surface.
In the present embodiment, the description has been given centering on the suppression of the movement and inclination of the first lens 11 in the radial direction, but the configuration of suppressing the movement and inclination of the first lens 11 in the radial direction can be applied to the other lenses 12 to 15.
The terms "front", "rear", and other terms indicating positional relationships used in the present specification are used in relation to the illustrated embodiments, and vary depending on the relative positional relationship of the devices.
As described above, according to one aspect of the present invention, there is provided a lens unit capable of suppressing movement and inclination of a lens in a radial direction and maintaining good optical characteristics. The lens unit has: a lens having a first lens surface, an inclined surface formed on an outer side of the first lens surface in a radial direction, a second lens surface located on an opposite side of the first lens surface along an optical axis, and a contact surface formed on an outer side of the second lens surface in the radial direction; and a lens barrel that holds the lens. The lens barrel includes a support portion having a support surface capable of coming into contact with the contact surface of the lens. The lens unit further includes a pressing member that presses the lens toward the support surface of the lens barrel, and the pressing member includes an abutting portion having a pressing surface that can abut against the inclined surface of the lens. The abutting portion of the pressing member and the supporting portion of the lens barrel are arranged in a row in the direction of the optical axis.
According to this configuration, since the pressing surface of the pressing member abuts against the inclined surface of the lens to press the lens, the pressing force of the pressing member is converted into a radial force and acts on the lens. Therefore, a force in the radial direction is always applied to the lens, and the lens is not easily moved in the radial direction even when an impact is applied to the lens unit.
Further, since the abutting portion of the pressing member and the support portion of the lens barrel are arranged in line in the direction of the optical axis, the portion of the lens pressed by the pressing member and the portion of the lens supported by the support portion of the lens barrel are positioned on the same line along the direction of the optical axis. Therefore, the lens is less likely to generate moment or bending stress due to the pressing force of the pressing member, and is less likely to tilt even when an impact is applied to the lens unit.
Thus, according to the above configuration, since the movement and inclination of the lens in the radial direction can be suppressed, the optical characteristics of the lens unit can be maintained satisfactorily.
Preferably, the lens unit further includes a seal member disposed radially inward of the support portion of the lens barrel. Such a sealing member may be disposed between the outer peripheral edge of the lens and the inner peripheral surface of the lens barrel, for example, but in this case, it is considered that the outer peripheral edge of the lens is hooked on the sealing member at the time of assembly to damage the sealing member, which results in a decrease in the sealing performance of the sealing member. Therefore, by disposing the seal member radially inward of the support portion of the lens barrel, the outer peripheral edge of the lens is not caught by the seal member during assembly, and the seal member is less likely to be damaged. Therefore, the sealing performance of the sealing member can be maintained well.
The lens barrel may further include a flange portion located radially inward of the seal member. In this case, the sealing member may be disposed in a recess formed between the support portion and the flange portion of the lens barrel. By disposing the seal member in the recess formed between the support portion and the flange portion of the lens barrel in this manner, the flange portion of the lens barrel is positioned radially inward of the seal member. Therefore, even if a force acts on the seal member from the radially outer side toward the radially inner side due to water pressure or the like, the seal member is supported by the flange portion of the lens barrel, and the seal member can be prevented from coming off.
Preferably, a gap is formed between the flange portion of the lens barrel and the contact surface of the lens. By thus forming a gap between the flange portion of the lens barrel and the contact surface of the lens, the contact surface of the lens reliably contacts the support portion of the lens barrel, and therefore, the lens can be more effectively suppressed from tilting.
Preferably, the lens barrel has an inner peripheral surface into which an outer peripheral surface of the contact portion of the pressing member is fitted. In this case, it is preferable that an outer peripheral surface of the lens is fitted to the inner peripheral surface of the lens barrel. In this way, the contact portion of the pressing member and the lens are fitted to the same inner peripheral surface, whereby the pressing member and the lens can be arranged coaxially with high accuracy.
The pressing member may further include a screw portion having a male screw formed thereon. In this case, the lens barrel may have a female screw portion into which the male screw of the screw portion of the pressing member is screwed. In this way, the lens can be reliably pressed toward the support portion by screwing the threaded portion of the pressing member into the female threaded portion of the lens barrel.
While the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and may be implemented in various different forms within the scope of the technical idea.
Claims (7)
1. A lens unit is characterized in that a lens unit is provided,
the lens unit has:
a lens having a first lens surface, an inclined surface formed on an outer side of the first lens surface in a radial direction, a second lens surface located on an opposite side of the first lens surface along an optical axis, and an abutment surface formed on an outer side of the second lens surface in the radial direction;
a lens barrel that holds the lens and includes a support portion having a support surface that can be brought into contact with the contact surface of the lens; and
a pressing member that presses the lens toward the support surface of the lens barrel, the pressing member including an abutting portion having a pressing surface that can abut against the inclined surface of the lens,
the abutting portion of the pressing member and the supporting portion of the lens barrel are arranged in a row in the direction of the optical axis.
2. The lens unit according to claim 1,
the lens unit further includes a seal member disposed radially inward of the support portion of the lens barrel.
3. The lens unit according to claim 2,
the lens barrel further includes a flange portion located radially inward of the seal member,
the seal member is disposed in a recess formed between the support portion and the flange portion of the lens barrel.
4. The lens unit according to claim 3,
a gap is formed between the flange portion of the lens barrel and the contact surface of the lens.
5. The lens unit according to any one of claims 1 to 4,
the lens barrel has an inner peripheral surface into which an outer peripheral surface of the abutting portion of the pressing member is fitted.
6. The lens unit according to claim 5,
the outer peripheral surface of the lens is fitted to the inner peripheral surface of the lens barrel.
7. The lens unit according to any one of claims 1 to 4,
the pressing member further includes a screw portion formed with an external thread,
the lens barrel has an internal thread portion to which the external thread of the thread portion of the pressing member is screwed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-106297 | 2021-06-28 | ||
| JP2021106297A JP2023004543A (en) | 2021-06-28 | 2021-06-28 | lens unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217879776U true CN217879776U (en) | 2022-11-22 |
Family
ID=84096898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221623008.XU Active CN217879776U (en) | 2021-06-28 | 2022-06-27 | Lens unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2023004543A (en) |
| CN (1) | CN217879776U (en) |
-
2021
- 2021-06-28 JP JP2021106297A patent/JP2023004543A/en active Pending
-
2022
- 2022-06-27 CN CN202221623008.XU patent/CN217879776U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023004543A (en) | 2023-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2007199344A (en) | Lens apparatus | |
| JP2012173366A (en) | Lens holding structure | |
| JP2007057795A (en) | Lens-fixing device and lens barrel using the same | |
| JP2020098271A (en) | Lens module and imaging device for vehicles | |
| JP2009048024A (en) | Lens unit, imaging module, and optical apparatus | |
| JP6192560B2 (en) | Lens barrel and optical apparatus having the same | |
| KR20170043519A (en) | Mounting system and method for night vision tubes | |
| US11719904B2 (en) | Optical arrangement for small size wide angle auto focus imaging lens for high resolution sensors | |
| US7417805B2 (en) | Camera device | |
| JP2011075682A (en) | Optical lens | |
| CN217879776U (en) | Lens unit | |
| US20110075277A1 (en) | Camera module | |
| JP2010197759A (en) | Lens assembly | |
| US8351140B2 (en) | Lens barrel and lens module | |
| US20200049950A1 (en) | Lens module | |
| JPH08179179A (en) | Lens holding device, camera and optical device | |
| JP2005017951A (en) | Imaging apparatus | |
| US20200041746A1 (en) | Lens module | |
| JP4882776B2 (en) | Adapter ring and camera | |
| US6768597B2 (en) | Mount for optical elements | |
| JP2005189261A (en) | Lens unit and electronic equipment using the same | |
| US11474322B2 (en) | Lens apparatus and imaging apparatus having the same | |
| JPH07140367A (en) | Lens barrel | |
| US20220075138A1 (en) | Apparatus and image pickup apparatus | |
| JP7094346B2 (en) | Lens unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |