CN110764212A - Lens barrel and method for manufacturing the same - Google Patents
Lens barrel and method for manufacturing the same Download PDFInfo
- Publication number
- CN110764212A CN110764212A CN201810832299.5A CN201810832299A CN110764212A CN 110764212 A CN110764212 A CN 110764212A CN 201810832299 A CN201810832299 A CN 201810832299A CN 110764212 A CN110764212 A CN 110764212A
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- CN
- China
- Prior art keywords
- sleeve
- guide rod
- lens barrel
- magnet
- hole
- 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.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
Abstract
A lens barrel includes a sleeve, a guide rod and a magnet. The guide rod is arranged on the sleeve and has paramagnetism. The magnet is disposed on the sleeve.
Description
Technical Field
The present invention relates to a lens barrel and a method for manufacturing the same, and more particularly, to a lens barrel having a magnet and a method for manufacturing the same.
Background
The image capturing device comprises a plurality of components. There is inevitably a clearance between these components due to machining tolerances, assembly tolerances or low temperature actuation. Therefore, the image capturing device can shake the image displayed on the screen during the relative movement of the components of the image capturing device, such as during the zooming process (zooming). In view of the above, there is a need to provide a new lens barrel capable of improving the above problems.
Disclosure of Invention
The present invention provides a lens barrel and a method for manufacturing the same, which can improve the above problems.
According to an embodiment of the present invention, the lens barrel includes a sleeve, a first guide rod, and a magnet. The first guide rod is arranged on the sleeve and has paramagnetism. The magnet is disposed on the sleeve. Thus, the sleeve and the first guide rod can smoothly move relatively.
According to another embodiment of the present invention, a lens barrel includes a sleeve, a first guide rod, and a magnet. The first guide rod is arranged on the sleeve. The magnet is disposed on the sleeve. The magnet and the first guide rod are arranged in a shortest distance, a part of the block of the sleeve is positioned in the shortest distance, and the magnetic lines of force between the magnet and the first guide rod pass through the part of the block. Thus, the sleeve and the first guide rod can smoothly move relatively.
According to another embodiment of the present invention, a lens barrel includes a sleeve, a first guide rod, and an elastic element. The first guide rod is arranged on the sleeve. The elastic element is connected with the sleeve and the first guide rod. Thus, the sleeve and the first guide rod can smoothly move relatively.
According to another embodiment of the present invention, a method of manufacturing a lens barrel includes the steps of: the magnet is arranged on the sleeve; and installing a first guide rod and a sleeve in the lens barrel, wherein the first guide rod has paramagnetism.
In the lens barrel and the manufacturing method thereof, the sleeve and the first guide rod can smoothly move relatively by the magnet and the elastic element, so that the problem of shaking generated by a camera image displayed on a screen of the image taking device in the image zooming process (zooming) is solved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 and 2 are schematic views of a lens barrel according to an embodiment of the present invention;
fig. 3 is a front view of the lens barrel of fig. 1 viewed in the-Z direction;
fig. 4 is a sectional view of the lens barrel of fig. 3 in the direction 4-4';
fig. 5 is a sectional view of the lens barrel of fig. 3 in the direction 5-5';
fig. 6 is a schematic view of a lens barrel according to another embodiment of the present invention; and
fig. 7 is a sectional view of the lens barrel of fig. 6 in a direction 7-7'.
Detailed Description
Referring to fig. 1 to 3, fig. 1 and 2 are schematic views of a lens barrel (main barrel)100 according to an embodiment of the invention, and fig. 3 is a front view of the lens barrel 100 of fig. 1 viewed in a-Z direction.
The lens barrel 100 may be applied to an image capturing device, such as a video camera or a still camera. The method can also be applied to projection devices such as projectors or home theaters. The lens barrel 100 includes a sleeve (cell)110, a first guide 120, a magnet 130, a lead screw 140, a driver 150, a second guide 160, and a sleeve 170. In addition, the lens barrel 100 may further include a housing (not shown), and the sleeve 110, the first guide rod 120, the magnet 130, the lead screw 140, the driver 150, the second guide rod 160, and the sleeve 170 may be disposed in the housing.
The first guide 120 is disposed on the sleeve 110 and the magnet 130 is disposed on the sleeve 110. The first guide bar 120 has paramagnetism, so that a magnetic attraction force is generated between the magnet 130 and the first guide bar 120. As a result, as shown in fig. 3, the first guide rod 120 is abutted against the sleeve 110 by the magnetic attraction. In a sliding process (e.g., a zooming process) of the sleeve 110 relative to the first guide bar 120, the first guide bar 120 and the sleeve 110 are kept in an abutting state (the clearance at the abutting position is 0), so that the shaking of the image can be reduced or even avoided.
As shown in fig. 3, a non-air medium is disposed between the first guide rod 120 and the magnet 130, such as a partial block M1 (shown by a dotted line) of the sleeve 110, and the partial block M1 is, for example, a partial solid block of the sleeve 110. In detail, the magnet 130 and the first guide bar 120 have a shortest distance S1 therebetween, the partial block M1 of the sleeve 110 is located within the shortest distance S1, and magnetic lines (not shown) between the magnet 130 and the first guide bar 120 pass through the partial block M1.
As shown in fig. 1 and 2, the lead screw 140 is coupled to the sleeve 110. The driver 150 is connected to the lead screw 140 and can drive the lead screw 140 to rotate so as to drive the sleeve 110 to move along the optical axis, such as along the Z direction. The driver 150 is, for example, a motor. In another embodiment, the means for driving the sleeve 110 may be a voice coil motor, a stepper motor, a piezoelectric element, a magnetically levitated inductive element, an electromagnet, or other suitable element. In addition, the second guide 160 is disposed at the sleeve 110. The first guide rod 120 and the second guide rod 160 can guide the sleeve 110 to move in the optical axis direction. Although not shown, at least one lens is disposed in the sleeve 110. The light from the object side is incident on the image sensor (not shown) through the at least one lens, so that the image sensor senses an object image on the object side.
In the present embodiment, as shown in fig. 1 and 2, the sleeve 110 is a movable sleeve, and the sleeve 170 is a fixed sleeve. Although not shown, at least one lens may be disposed within the sleeve 170. The light from the object side is incident on the image sensor (not shown) through the at least one lens, so that the image sensor senses an object image on the object side. When the lens barrel 100 is applied to an image capturing device, the object side may be an image magnifying side, and the image side may be an image sensing element; when the lens barrel 100 is applied to a projection apparatus, the object side may be an image reduction side, such as a light valve position side, and the image side may be an image enlargement side, such as a screen.
As shown in fig. 1, the sleeve 110 includes a sleeve body 111 and a slider 112. The sleeve body 111 has an end surface 111 s. The slider 112 is connected to the sleeve body 111 and protrudes relative to the end surface 111s, for example, and extends along a long axis direction of the first guide bar 120, for example, the Z direction. The magnet 130 is disposed on the slider 112, for example, on an inner side surface 112s of the slider 112, and a normal direction of the inner side surface 112s is, for example, substantially perpendicular to the optical axis direction, for example, substantially in the-X direction. In another embodiment, the magnet 130 may also be disposed on the upper surface 112u (the upper surface 112u is shown in fig. 1), the lower surface 112b (the lower surface 112b is shown in fig. 1) or the outer side surface of the slider 112.
As shown in fig. 3, the slider 112 of the sleeve 110 has a first through hole 112a1, and the first guide bar 120 passes through the first through hole 112a 1. As shown in FIG. 3, the outer diameter of the first guide bar 120 is smaller than the inner diameter of the first through hole 112a1, so that a clearance c is provided between the first guide bar 120 and the first through hole 112a 1. Under the action of the magnetic attraction, the first guide rod 120 is in one-side abutment with the inner side wall of the first through hole 112a1, and the clearance of the abutment position T1 is 0. As shown in fig. 3, a line L1 connecting the axial center AC1 of the first guide rod 120 and the axial center AC2 of the second guide rod 160 passes through the magnet 130. Thus, the center AC3 of the first through hole 112a1 can be close to the line L1. Therefore, the sleeve 110 can maintain stable imaging quality during the rotation and/or movement process, and is not affected by the rotation variation and/or movement variation of the sleeve 110.
As shown in fig. 3, the axis AC1 of the first guide bar 120 and the center AC3 of the first through hole 112a1 have a connecting line L2, wherein an included angle a1 between the connecting line L2 and the connecting line L1 is less than 20 degrees, preferably but not limited to less than 10 degrees, such as 5 degrees or 0 degrees. When line L1 substantially coincides with line L2, it indicates that angle A1 is substantially 0 degrees. In this way, the mechanical center of the sleeve 110 substantially coincides with the optical axis (i.e., good coaxiality), in other words, the mechanical center of the lens barrel 100 overlaps with the optical axis of the optical system, so that the lens barrel 100 provides excellent imaging quality.
As shown in fig. 3, the magnet 130 has an arrangement surface 130s, and the magnet 130 is arranged on the sleeve 110 with the arrangement surface 130 s. In an embodiment, a connection line L1 between the axis AC1 of the first guide bar 120 and the axis AC2 of the second guide bar 160 can pass through the center C1 of the disposition surface 130s, so that the center AC3 of the first through hole 112a1 and the connection line L1 are substantially overlapped, that is, the connection line L1 passes through the center AC3 of the first through hole 112a 1. Thus, the finished lens barrel 100 can be close to the design specification.
Referring to fig. 4 to 5, fig. 4 is a sectional view of the lens barrel 100 of fig. 3 along a direction 4-4', and fig. 5 is a sectional view of the lens barrel 100 of fig. 3 along a direction 5-5'.
As shown in FIGS. 4 and 5, the slider 112 further has a second through hole 112a2, and the first guide rod 120 passes through the first through hole 112a1 and the second through hole 112a 2. The center C1 of the magnet 130 substantially corresponds to the middle position C2 between the first through hole 112a1 and the second through hole 112a 2. Thus, under the action of the magnetic attraction, the abutting force F11 of the first guide rod 120 and the inner sidewall 112w1 of the first through hole 112a1 and the abutting force F12 of the first guide rod 120 and the inner sidewall 112w2 of the second through hole 112a2 are substantially the same, so that the movement of the sleeve 110 relative to the first guide rod 120 is smoother, and the wear pattern of the inner sidewall 112w1 of the first through hole 112a1 is more consistent with the wear pattern of the inner sidewall 112w2 of the second through hole 112a 2.
Although the acting force between the first guide rod 120 and the magnet 130 in the above embodiments is illustrated as a magnetic attraction force, it can also be a magnetic repulsion force. For example, the material of the first guide rod 120 may include a magnet, and the first guide rod 120 and the magnet 130 are disposed opposite to each other with the same magnetic surface. Thus, a magnetic repulsion force is generated between the magnet 130 and the first guide bar 120 to generate a technical effect similar to the aforementioned one-side abutting of the first guide bar 120 and the sleeve 110, but the abutting position is the opposite side of the abutting position shown in fig. 3.
In addition, the lens barrel 100 of the foregoing embodiment realizes the abutment of the first guide rod 120 and the sleeve 110 by a non-contact force (such as a magnetic force), but the embodiment of the invention is not limited to the non-contact force.
Referring to fig. 6 to 7, fig. 6 is a schematic view of a lens barrel 200 according to another embodiment of the present invention, and fig. 7 is a cross-sectional view of the lens barrel 200 of fig. 6 along a direction 7-7'. The lens barrel 200 may be applied to an image capturing device, such as a video camera or a still camera, or a projection device, such as a projector or a home theater.
The lens barrel 200 includes a sleeve 110, a first guide rod 120, an elastic member 230, a lead screw 140, a driver 150, a second guide rod 160, and a sleeve 170. In addition, the lens barrel 200 may further include a housing (not shown), and the sleeve 110, the first guide rod 120, the elastic element 230, the lead screw 140, the driver 150, the second guide rod 160, and the sleeve 170 may be disposed in the housing. The lens barrel 200 of the embodiment of the present invention has similar or identical technical features to the lens barrel 100, except that the lens barrel 200 realizes the abutting connection of the first guide rod 120 and the sleeve 110 by contact force.
In detail, as shown in fig. 7, the elastic element 230 connects the sleeve 110 and the first guide bar 120, and provides an elastic force F21 to the first guide bar 120, so that the first guide bar 120 abuts against the sleeve 110. In this embodiment, the elastic force F21 acts on the first guide bar 120, and the first guide bar 120 provides a reaction force F22 to the sleeve 110. Under the action of the reaction force F22, the sleeve 110 moves (e.g., moves in the-X direction) in the direction of the reaction force F22 relative to the first guide rod 120, so that the first guide rod 120 contacts the inner sidewall 112w1 of the first through hole 112a1, wherein the normal direction of the inner sidewall 112w1 is substantially toward the direction of the reaction force F22.
The elastic element 230 includes an abutting portion 231 and an elastic portion 232. The abutting portion 231 abuts against the first guide bar 120. The abutting portion 231 is softer than the first guide bar 120, and abrasion of the first guide bar 120 can be reduced. The abutting portion 231 may be made of sponge, plastic, rubber or other suitable materials.
In addition, the abutting portion 231 is not fixedly connected to the first guide bar 120, so that the abutting portion 231 and the first guide bar 120 can slide relative to each other. As such, when the sleeve 110 moves relative to the first guide bar 120, the abutting portion 231 can slide relative to the first guide bar 120. During the relative sliding, the abutting portion 231 and the first guide bar 120 are kept in the abutting state by the elastic force of the elastic portion 232.
As shown in fig. 7, the elastic portion 232 connects the abutting portion 231 and the sleeve 110. The resilient portion 232 may be, for example, a spring, a leaf spring, a pogo pin mechanism, or other suitable mechanical element. In addition, the sleeve 110 further has a receiving groove 110r, and the first guide rod 120 passes through the receiving groove 110 r. The first end 2321 of the elastic part 232 of the elastic element 230 is fixed to the inner wall of the receiving groove 110r, and the second end 2322 of the elastic part 232 of the elastic element 230 is connected to the abutting part 231. The elastic portion 232 supplies the elastic force F21 to the abutting portion 231, and the abutting portion 231 abuts against the first guide bar 120.
As shown in fig. 7, the elastic force F21 provided by the elastic element 230 passes through the axis AC1 of the first guide bar 120. Therefore, the stability of the sleeve 110 and the first guide rod 120 can be increased in the relative sliding process of the sleeve 110 and the first guide rod 120, which is helpful for reducing or even avoiding the shaking of the camera.
In addition, the method for manufacturing the lens barrel 100 may include: first, the magnet 130 is disposed on the sleeve 110; then, the first guide rod 120 and the sleeve 110 are installed in the lens barrel 100, wherein the first guide rod 120 has paramagnetism. The method for manufacturing the lens barrel 200 may include: first, the elastic element 230 is disposed on the sleeve 110; then, first guide rod 120 and sleeve 110 are installed in lens barrel 100, and elastic element 230 connects sleeve 110 and first guide rod 120. Another manufacturing method of the lens barrel 200 may include: first, the first guide rod 120 and the sleeve 110 are installed in the lens barrel 100; then, the elastic element 230 is installed on the sleeve 110, and the elastic element 230 is connected to the sleeve 110 and the first guide bar 120.
In the lens barrel and the manufacturing method thereof, the sleeve and the first guide rod can smoothly move relatively by the magnet and the elastic element, so that the problem of shaking generated by a camera image displayed on a screen of the image taking device in the image zooming process (zooming) is solved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A lens barrel characterized by comprising:
a sleeve;
the first guide rod is arranged on the sleeve and has paramagnetism; and
a magnet disposed on the sleeve.
2. The lens barrel according to claim 1, wherein the sleeve further includes:
a sleeve body having an end face; and
the sliding block is connected with the sleeve body, protrudes relative to the end face and extends along the long axis direction of the first guide rod;
wherein the magnet is disposed on the slider.
3. The lens barrel according to claim 2, wherein the slider further has a first through hole and a second through hole, the first guide rod passes through the first through hole and the second through hole, and a center of the magnet substantially corresponds to an intermediate position between the first through hole and the second through hole.
4. The lens barrel according to claim 1, further comprising:
the second guide rod is arranged on the sleeve;
wherein a connecting line between an axis of the first guide rod and an axis of the second guide rod passes through the magnet.
5. The lens barrel according to claim 4, wherein the lens barrel satisfies at least one of the following conditions: (1) the magnet is provided with a configuration surface, the magnet is configured on the sleeve through the configuration surface, and the connecting line between the axis of the first guide rod and the axis of the second guide rod passes through a center of the configuration surface; (2) the sleeve is provided with a through hole, the first guide rod penetrates through the through hole, and the connecting line between the axis of the first guide rod and the axis of the second guide rod passes through the center of the through hole.
6. A lens barrel characterized by comprising:
a sleeve;
the first guide rod is arranged on the sleeve; and
a magnet disposed on the sleeve;
the magnet and the first guide rod are arranged in a sleeve, a part of the sleeve is located in the shortest distance, and a magnetic line of force between the magnet and the first guide rod penetrates through the part of the sleeve.
7. A lens barrel characterized by comprising:
a sleeve;
the first guide rod is arranged on the sleeve; and
and the elastic element is connected with the sleeve and the first guide rod.
8. The lens barrel according to claim 7, wherein the elastic member further includes:
the abutting part abuts against the first guide rod; and
and the elastic part is connected with the abutting part and the sleeve.
9. The lens barrel according to claim 8, wherein the sleeve further has a receiving groove, the first guide rod passes through the receiving groove, a first end of the elastic portion is fixed to an inner wall of the receiving groove, and a second end of the elastic portion slidably abuts against the first guide rod.
10. A method of manufacturing a lens barrel, comprising:
arranging a magnet on a sleeve; and
and installing a first guide rod and the sleeve in the lens barrel, wherein the first guide rod has paramagnetism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832299.5A CN110764212A (en) | 2018-07-26 | 2018-07-26 | Lens barrel and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832299.5A CN110764212A (en) | 2018-07-26 | 2018-07-26 | Lens barrel and method for manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110764212A true CN110764212A (en) | 2020-02-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810832299.5A Pending CN110764212A (en) | 2018-07-26 | 2018-07-26 | Lens barrel and method for manufacturing the same |
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| Country | Link |
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| CN (1) | CN110764212A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022007201A1 (en) * | 2020-07-09 | 2022-01-13 | 瑞声声学科技(深圳)有限公司 | Drive assembly, camera module, and electronic device with photography function |
| WO2022007203A1 (en) * | 2020-07-09 | 2022-01-13 | 诚瑞光学(深圳)有限公司 | Zoom lens group |
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