TWI627461B - Image-capturing device - Google Patents

Abstract

An imaging device includes a base, a lens barrel, and a spiral body. The base includes an opening and a first thread. The first thread is located at the opening. The lens barrel includes a barrel body and a second thread. The body is provided with an operation part. The second thread corresponds to the first thread screwed to the base and is not locked to each other. The spiral body is formed by spirally surrounding a long element. The front and back ends of the strip element are a first end and a second end, respectively. The first end is coupled to the operation portion of the lens barrel. The second end is bonded to the base. Among them, the length of the long element is deformed by heat, which drives the operating portion of the lens barrel to generate a corresponding angular displacement relative to the base.

Description

Camera

An imaging device, particularly an imaging device capable of correcting out-of-focus in response to temperature changes.

At present, there are already photography devices used in various fields, such as driving recorders and surveillance cameras. Therefore, various photographing devices can be installed on a car, a helmet, an intersection, an entrance, etc., so as to be able to photograph a place to be monitored.

However, the most important requirement for a photographing device is whether the displayed picture is clear. In other words, when the image captured by the photographing device is blurred, it will cause inconvenience for people to watch.

Among them, the environment in which many photographing devices are installed can be very harsh, such as at intersections, in cars, and the like. Usually, in summer, the photographic device is exposed to direct sunlight, which causes its internal temperature to be very high. In addition, the focal length of the photographing device may be slightly deviated from the original position due to thermal expansion and contraction, and the displayed image may be blurred. If you manually adjust the focus when the temperature inside the camera is too high, the image will be clear. However, when the temperature drops, the focal length of the photographing device will deviate from the position where the image can be clearly imaged, and the focal length must be adjusted again manually. In other words, it is extremely inconvenient for the user to constantly adjust the focal length of the photographing device according to the temperature.

According to the above problems, the present invention provides an imaging device capable of correcting a distance between a lens barrel and a base in response to a temperature change, thereby obtaining a clear image at any time in a harsh environment.

An embodiment of the present invention provides an imaging device including a base, a lens barrel, and a spiral body. The base includes an opening and a first thread. The first thread is located at the opening. The lens barrel includes a barrel body and a second thread. The body is provided with an operation part. The second thread corresponds to the first thread screwed to the base and is not locked to each other. The spiral body is formed by spirally surrounding a long element. The front and back ends of the strip element are a first end and a second end, respectively. The first end is coupled to the operation portion of the lens barrel. The second end is bonded to the base. When the length of the long element is deformed due to heat, the operating portion of the lens barrel is driven to generate a corresponding angular displacement relative to the base.

An embodiment of the present invention provides an imaging device including a base, a lens barrel, a first spiral body and a second spiral body. The base includes an opening and a first thread. The first thread is located at the opening. The lens barrel includes a barrel body and a second thread. The body is provided with an operation part. The second thread corresponds to the first thread screwed to the base and is not locked to each other. The first spiral body is spirally surrounded by the first elongated element. The front and back ends of the first strip element are a first end and a second end, respectively. The first end is coupled to the operation portion of the lens barrel, and the second end is coupled to the base. The second spiral body is spirally surrounded by the second elongated element. The front and back ends of the second strip element are a third end and a fourth end, respectively. The third end is coupled to the operation portion of the lens barrel, and the fourth end is coupled to the base. Here, when the first elongated element and the second elongated element together generate a total length deformation due to heat, the operating portion of the lens barrel is driven to generate a corresponding angular displacement relative to the base.

In an embodiment, the first spiral body and the second spiral body have different outer diameters and can be coaxially sleeved with each other.

In one embodiment, the first spiral body and the second spiral body are interlaced.

In one embodiment, the first spiral body and the second spiral body have the same or opposite spiral directions.

In one embodiment, the first spiral body and the second spiral body have the same or different thermal expansion coefficients.

FIG. 1 is a perspective view of a first embodiment of an imaging device 1 of the present invention. FIG. 2 is an exploded view of the first embodiment of the imaging device 1 of the present invention. Fig. 3 is a sectional view taken along the line A-A in Fig. 1. Please refer to FIGS. 1 to 3. The camera device 1 includes a base 10, a lens barrel 20 and a spiral body 30. The lens barrel 20 is disposed on the base 10. The spiral body 30 is disposed between the lens barrel 20 and the base 10.

The base 10 is a casing, and one side of the casing has an opening 11. The opening 11 is provided with a first thread 12, and the first thread 12 of the opening 11 is used for screwing the lens barrel 20 thereon. In addition, the base 10 is provided with an electronic photosensitive element 13 for converting an image captured by the imaging device 1 to generate an image signal.

The lens barrel 20 includes a barrel 21, and the outer periphery of the barrel 21 has a second thread 22. The barrel 21 is provided with an operation portion 211. The second thread 22 corresponds to the first thread 12 screwed to the base 10. The second threads 22 are not locked to each other when they are screwed to the first threads 12. In other words, when the second thread 22 and the first thread 12 are screwed to each other, the lens barrel 20 can be rotated forward or reversely corresponding to the base 10.

In an embodiment, the operation portion 211 and the second thread 22 are respectively located at two axially opposite ends of the lens barrel 20, wherein one end of the lens barrel 20 is adjacent to the base 10 relative to the other end, and That is, the other end of the lens barrel 20 is far from the base 10 relative to the one end. In detail, the second thread 22 is located at one end of the lens barrel 20 adjacent to the base 10, and the operation portion 211 is located at the other end of the lens barrel 20 away from the base 10. The present invention is not limited thereto. In one embodiment, the operation portion 211 may be located at the middle position of the barrel 21. In still another embodiment, when the operation portion 211 is located at the middle position of the barrel 21 (not shown), the operation portion 211 does not overlap the second thread 22. For example, the second thread 22 is located in the lens barrel 20. The description is adjacent to one end of the base 10.

In addition, the lens barrel 20 is provided with at least one lens 23 in the barrel body 21. Here, the imaging device 1 obtains an external image through the lens 23 to be transmitted to the electronic photosensitive element 13 through the barrel body 21 and the opening 11. The image obtained by the imaging device 1 through the lens 23 can form a clear image when the image falls on the focal length of the lens 23. Therefore, there is an imaging focal distance D between the lens 23 and the electronic photosensitive element 13 (as shown in FIG. 3). In other words, for the electronic photosensitive element 13 to generate a clear image signal, the image captured by the lens 23 should fall on the electronic photosensitive element 13 at the imaging focal length D. Therefore, the clear image obtained by the imaging device 1 through the lens 23 can fall on the electronic photosensitive element 13, so that the electronic photosensitive element 13 generates a corresponding image signal.

Please refer to FIG. 2 again. In one embodiment, the spiral body 30 is coaxially and spirally wound through a strip member 31, and the strip member 31 has a first end 32 and an opposite second end 33. The elongated element 31 constitutes an annular portion 311 between the first end 32 and the second end 33 due to spiral winding. The first end 32 is an operation portion 211 coupled to the lens barrel 20, wherein the operation portion 211 may be a jack 2111 (as shown in FIG. 2) or an abutting block 2112 (as shown in FIG. 5). Details later. The second end 33 is a positioning hole 14 coupled to the base 10 (as shown in FIG. 2), and may also be coupled to the stopper 15 (as shown in FIG. 5). Details will be described in detail later.

Wherein, the annular portion 311 may be formed by spirally winding the long element 31, or may be formed by spirally winding the long element 31.

Wherein, the annular portion 311 may be constituted by being surrounded by the same radius, or may be constituted by being surrounded by different radii.

The annular portion 311 can be spirally clockwise or counterclockwise. The present invention is not limited thereto.

FIG. 4 is a schematic diagram of the length change of the spiral body 30 according to the present invention during thermal expansion and contraction. Referring to FIG. 4, the length of the long element 31 can generate a length deformation L corresponding to the thermal energy. In other words, according to the principle of thermal expansion and contraction, the elongated element 31 can generate a length deformation amount L corresponding to its own temperature. In addition, the elongated element 31 drives the lens barrel 20 to generate an angular displacement S relative to the base 10 according to the length deformation amount L. In this embodiment, the length deformation amount L of the long element 31 due to thermal energy is a length extending in the arc direction at the same axis as the ring portion 311, and the length deformation amount L has a length corresponding to the ring portion 311. The angular displacement S of the axis. Therefore, the elongated element 31 will rotate the angular displacement S in the direction in which the elongated element 31 is extended via the first end 32 according to the length deformation amount L; One end 32 abuts the base 10 and further causes the first end 32 to extend in the opposite direction of the second end 33 to drive the operation portion 211 to rotate the angular displacement S in a direction in which the elongated element 31 is extended. Thereby, the lens barrel 20 can be rotated corresponding to the angular displacement S and corresponding to the base 10. Here, the operation part 211 can provide the elongated element 31 to drive the lens barrel 20 to rotate corresponding to the base 10 according to the length deformation amount L. Conversely, when the length deformation amount L of the elongated element 31 is reduced according to thermal energy, the operation portion 211 can also be driven to rotate the angular displacement S by the first end 32 in the direction in which the elongated element 31 is reduced.

As mentioned above, when the camera device 1 is at different ambient temperatures, or when the thermal energy generated by the operation of the camera device 1 is excessive, the length of the long element 31 of the spiral body 30 in the camera device 1 will increase corresponding to the temperature. Less. For example, when the ambient temperature of the imaging device 1 is increased, the length of the elongated element 31 of the spiral body 30 is increased due to the thermal expansion and contraction principle. Conversely, when the ambient temperature of the imaging device 1 decreases, the spiral body 30 will be reduced in length in accordance with the principle of thermal expansion and contraction. Makes its total length shorter.

Therefore, when the length of the elongated element 31 increases due to the length deformation amount L, it can use the first end 32 to push the operation portion 211 to rotate the lens barrel 20 relative to the base 10. Similarly, when the length of the elongated element 31 is reduced due to the length deformation amount L, it can also use the first end 32 to pull the operation portion 211 to rotate the lens barrel 20 relative to the base 10. Therefore, the imaging focal distance D between the lens 23 and the electronic photosensitive element 13 can be further maintained. In other words, by rotating the lens barrel 20 relative to the base 10, the distance between the lens barrel 20 and the base 10 can be adjusted to maintain the imaging focal length D, and the clear image captured by the camera device 1 through the lens 23 can be further improved. Fall on the electronic photosensitive element 13.

Wherein, the first thread 12 may be on the inner peripheral edge of the opening 11 (as shown in FIG. 2), and the second thread 22 is correspondingly located on the outer peripheral edge of the lens barrel 20. The present invention is not limited thereto. The first thread 12 may also be on the outer peripheral edge (not shown) of the opening 11, and the second thread 22 is correspondingly located on the inner peripheral edge of the lens barrel 20.

Please refer to FIG. 2 and FIG. 3 again, the operation portion 211 of the lens barrel 20 is a jack 2111. The socket 2111 is correspondingly inserted into the first end 32 of the spiral body 30 so that the spiral body 30 can push or pull the lens barrel 20 through the first end 32 and the first end 32 of the spiral body 30 is not loosened from the operation portion 211. The first end 32 of the elongated element 31 is substantially L-shaped so as to be correspondingly inserted into the socket 2111. In addition, the elongated element 31 can increase due to the temperature rise, so that the first end 32 can push the lens barrel 20 to rotate relative to the base 10 through the jack 2111 in response to the increase of the length of the elongated element 31. Similarly, the first end 32 of the elongated element 31 can be reduced due to the temperature drop, so that the first end 32 can pull the lens barrel 20 to rotate relative to the base 10 through the insertion hole 2111.

Similarly, the base 10 is provided with a positioning hole 14 for corresponding insertion of the second end 33 of the spiral body 30 so that the spiral body 30 can drive the lens barrel 20 to rotate through the second end 33 and the second end of the spiral body 30. 33 will not loosen to the base 10. The second end 33 of the elongated element 31 is also generally L-shaped to be correspondingly inserted into the positioning hole 14. When the elongated element 31 grows according to the temperature rise, the second end 33 can drive the lens barrel 20 relative to the base 10 through the positioning hole 14. Similarly, when the length of the elongated element 31 is reduced due to the temperature drop, the lens barrel 20 is further driven to rotate relative to the base 10 through the positioning hole 14.

FIG. 5 is an exploded view of another embodiment of the imaging device 1 of the present invention. FIG. 6 is a sectional view of FIG. 5 after being combined. 5 and FIG. 6, the operation portion 211 of the lens barrel 20 is an abutting block 2112. The first end 32 of the elongated member 31 in the spiral body 30 can be selectively pushed up or away from the abutting block 2112. The length of the elongated element 31 increases as the temperature rises, and the first end 32 pushes against the block 2112 to further cause the lens barrel 20 to rotate relative to the base 10.

In one embodiment, the base 10 is provided with a stopper 15. When the length of the elongated element 31 increases due to the temperature rise, the second end 33 can push against the stopper 15 and can drive the lens barrel 20 relative to the base 10. Spin.

FIG. 7 is an exploded view of still another embodiment of the imaging device 1 of the present invention. Please refer to FIG. 7. The difference between the imaging device 1 of this embodiment and the previous embodiment is that the spiral body (hereinafter referred to as the first spiral body 41) and the second spiral body 42 in this embodiment are coaxially disposed on the lens barrel 20 and the base. Between 10.

The first spiral body 41 is composed of the first elongated element 411 coaxially and spirally wound, and the front and rear ends of the first elongated element 411 are a first end 412 and a second end 413, respectively. The first elongated element 411 constitutes a first annular portion 414 between the first end 412 and the second end 413 in accordance with spiral winding. The first end 412 is coupled to the operation portion 211 (the jack 2111 or the abutting block 2112) of the lens barrel 20. The second end 413 is a positioning hole 14 (or a stop 15) coupled to the base 10. The structure of the second spiral body 42 is similar to that of the first spiral body 41, that is, the second spiral body 42 is formed by the second elongated element 421 coaxially and spirally, and the front and rear ends of the second elongated element 421 are third, respectively. Terminal 422 and fourth terminal 423. The second elongated element 421 constitutes a second annular portion 424 between the third end 422 and the fourth end 423 in accordance with spiral winding. The third end 422 is an operation portion 211 (a jack 2111 or an abutment block 2112) coupled to the lens barrel 20, and the fourth end 423 is a positioning hole 14 (or a stop 15) coupled to the base 10. Here, the first elongated element 411 and the second elongated element 421 can jointly generate a total length deformation amount in response to thermal energy, and can further drive the operation portion 211 of the lens barrel 20 to generate a corresponding angular displacement S relative to the base 10, Similar to the foregoing embodiment, the imaging focal length D of the lens 23 corresponding to the electronic photosensitive element 13 is maintained by this adjustment. That is, the first elongated element 411 and the second elongated element 421 can generate a total length deformation amount due to a physical phenomenon of thermal expansion and contraction, and the total length deformation amount corresponds to the first spiral body 41 or the second spiral body 42. It has an angular displacement S to further rotate the lens barrel 20 relative to the base 10, so that the distance between the lens 23 and the electronic photosensitive element 13 can be adjusted to maintain the imaging focal length D. Therefore, the clear image captured by the imaging device 1 through the lens 23 can be caused to fall on the electronic photosensitive element 13.

In this embodiment, the first spiral body 41 and the second spiral body 42 have different radii, and can be coaxially sleeved with each other (as shown in the figure). That is, the first spiral body 41 and the second spiral body 42 are disposed at the same axis and different radii, so that a distance is maintained between the first spiral body 41 and the second spiral body 42 in a radial direction. For example, the radius of the second annular portion 424 of the second spiral body 42 is smaller than the radius of the first annular portion 414 of the first spiral body 41. The present invention is not limited to this. In some embodiments, the radius of the surrounding of the first annular portion 414 and the radius of the surrounding of the second annular portion 424 are equal, that is, the first spiral body 41 and the second spiral body 42. Can be interwoven. Therefore, the first spiral body 41, the second spiral body 42 or more spiral bodies can respectively generate a length deformation amount when the temperature changes, and therefore the total length deformation amount can generate a strong push-pull force. , It is easier to cause the lens barrel 20 to rotate relative to the base 10, or when the distance between the lens barrel 20 and the electronic photosensitive element 13 changes non-linearly due to thermal changes, in this embodiment, the amount of movement can be changed through multiple spirals Non-linear, to more accurately correct the focus problem caused by thermal changes.

In one embodiment, the spiral direction of the first annular portion 414 of the first spiral body 41 and the spiral direction of the second annular portion 424 of the second spiral body 42 are opposite to each other. That is, when the spiral direction of the first annular portion 414 is a clockwise direction, the spiral direction of the second annular portion 424 is a counterclockwise direction. The present invention is not limited thereto. In some embodiments, the spiral direction of the first annular portion 414 of the first spiral body 41 and the spiral direction of the second annular portion 424 of the second spiral body 42 may be mutually the same.

In one embodiment, the thermal expansion coefficient of the first spiral body 41 and the thermal expansion coefficient of the second spiral body 42 may be the same. The present invention is not limited thereto. In other embodiments, the thermal expansion coefficient of the first spiral body 41 and the thermal expansion coefficient of the second spiral body 42 may be different.

In another embodiment, the first spiral body 41 and the second spiral body 42 can be connected in series in a continuous manner (not shown). That is, the first end 412 of the first spiral body 41 is coupled to the operation portion 211, the second end 413 is a third end 422 connected to the second spiral body 42, and the fourth end 423 of the second spiral body 42 is coupled to The base 10. Therefore, the embodiment can also use the total length deformation amount generated when the temperature changes to rotate the lens barrel 20 relative to the base 10. For example, the first expansion coefficient of the first spiral body 41 and the second thermal expansion coefficient of the second spiral body 42 are different. According to an embodiment of the present invention, the first spiral body 41 and the second spiral body 42 are connected in series to form a first spiral body. 41 and the second spiral body 42 each have their respective length deformations due to temperature changes, so that when the ambient temperature changes, this embodiment can use the first elongated element 411 and the second elongated element 421 together to generate The total length of the deformation to produce a more appropriate angular displacement S. The lens barrel 20 is rotated to a more appropriate position relative to the base 10, so that the distance between the lens 23 and the electronic photosensitive element 13 can be adjusted and maintained at the imaging focal length D more accurately.

In an embodiment, the total length of the first elongated element 411 of the first spiral body 41 and the total length of the second elongated element 421 of the second spiral body 42 may be equal to or different from each other. Demand design, the present invention is not limited thereto. Therefore, according to an embodiment of the present invention, by designing the total length of the first strip element 411 and the second strip element 421, the angular displacement corresponding to the total length deformation (that is, the sum of the length deformations) can be further designed S, so that the imaging device 1 can accurately adjust and maintain the distance between the control lens 23 and the electronic photosensitive element 13 at the imaging focal length D according to the ambient temperature.

When the first expansion coefficient of the first spiral body 41 and the second expansion coefficient of the second spiral body 42 are equal, the length deformation amount of the first elongated element 411 and the length deformation amount of the second elongated element 421 are equal.

The material of the first spiral body 41 and the material of the second spiral body 42 may be the same or different.

The first spiral body 41 and the second spiral body 42 are both metal spiral bodies.

The combination described in the foregoing embodiment means that the first end 32 (or the first end 412 and the third end 422) can be hooked, pulled, pushed, pushed, pushed, pushed, or touched in any other way. The operation part 211 or the second end 33 (or the second end 413 and the fourth end 423) can hook, pull, push, push, push, push, or any other way to contact the base 10. The present invention is not For restrictions.

According to the above embodiment, the imaging device 1 can generate a length deformation amount L through a spiral body (such as the above-mentioned spiral body 30, the first spiral body 41, the second spiral body 42, or a combination thereof), and an angular displacement amount corresponding to the length deformation amount L S, therefore, the lens barrel 20 can be further driven to rotate relative to the base 10, so that the external image obtained by the imaging device 1 can be clearly imaged on the electronic photosensitive element 13. In this way, the imaging device 1 of the present invention can obtain clear images under various ambient temperatures, so that the imaging device 1 can be more widely used in various harsh environments.

1‧‧‧ camera
10‧‧‧ base
11‧‧‧ opening
12‧‧‧ first thread
13‧‧‧Electronic photosensitive element
14‧‧‧ positioning holes
15‧‧‧ stop
20‧‧‧ lens barrel
21‧‧‧ tube body
22‧‧‧Second thread
23‧‧‧ lens
211‧‧‧Operation Department
2111‧‧‧jack
2112‧‧‧Top block
30‧‧‧ Borrelia
31‧‧‧Bar element
32‧‧‧ the first end
33‧‧‧ second end
311‧‧‧Ring
41‧‧‧First Borrelia
42‧‧‧Second Borrelia
411‧‧‧The first bar element
412‧‧‧ the first end
413‧‧‧second end
414‧‧‧First Ring
421‧‧‧Second bar element
422‧‧‧ third end
423‧‧‧ fourth end
424‧‧‧Second Ring Section
D‧‧‧ imaging focal length
S‧‧‧Angle Displacement
L‧‧‧length deformation

[FIG. 1] A perspective view of a first embodiment of an imaging device of the present invention. [FIG. 2] An exploded view of the first embodiment of the imaging device of the present invention. Fig. 3 is a sectional view taken along the line A-A in Fig. 1. [Fig. 4] Fig. 4 is a schematic diagram of a length change of a spiral body according to the present invention during thermal expansion and contraction. FIG. 5 is an exploded view of another embodiment of the imaging device of the present invention. [FIG. 6] A sectional view after the combination of FIG. 5. [FIG. [FIG. 7] An exploded view of still another embodiment of the imaging device of the present invention.

Claims (9)

A camera device includes: a base including an opening and a first thread, the first thread being located at the opening; a lens barrel including a barrel body and a second thread, the barrel body being provided with an operating portion, The second thread is correspondingly screwed to the first thread of the base and is not locked to each other; and a spiral body is formed by spirally surrounding a long element coaxially, and two ends of the long element are respectively one A first end and a second end, the first end is coupled to the operating portion of the lens barrel, and the second end is coupled to the base, wherein when the strip element generates a length deformation amount due to heat, the The operating portion of the lens barrel generates a corresponding angular displacement relative to the base. The imaging device according to claim 1, wherein the operation portion and the second thread are respectively located at two axially opposite ends of the lens barrel. The camera device according to claim 2, wherein the operating portion of the lens barrel is a jack, the first end of the spiral body is inserted into the jack, and the base is provided with a positioning hole, the spiral body The second end is inserted into the positioning hole. The camera device according to claim 2, wherein the operating portion of the lens barrel is an abutment block, the first end of the spiral body pushes up the abutment block, and the base is provided with a stopper, and the spiral body The second end pushes the stop. A camera device includes: a base including an opening and a first thread, the first thread being located at the opening; a lens barrel including a barrel body and a second thread, the barrel body being provided with an operating portion, The second thread is correspondingly screwed to the first thread of the base and is not locked to each other. A first spiral body is formed by spirally surrounding a first elongated element coaxially. The two ends are a first end and a second end, respectively, the first end is coupled to the operation part of the lens barrel, the second end is coupled to the base, and a second spiral body is connected by a second The elongated element is formed by coaxially spirally winding. The front and rear ends of the second elongated element are a third end and a fourth end, respectively. The third end is coupled to the operation portion of the lens barrel, and the fourth end is combined. To the base; wherein when the first elongated element and the second elongated element together generate a total length deformation due to heat, the operating portion of the lens barrel is driven to generate a corresponding angular displacement relative to the base . The imaging device according to claim 5, wherein the first spiral body and the second spiral body have different outer diameters and can be sleeved coaxially with each other. The imaging device according to claim 6, wherein the first spiral body and the second spiral body have opposite spiral directions. The imaging device according to claim 6 or 7, wherein the first spiral body and the second spiral body are interwoven. The imaging device according to claim 5, wherein the first spiral body and the second spiral body have the same thermal expansion coefficient.