TWI788235B - Camera device for preventing dew condensation and method of assembling the same - Google Patents

Abstract

A camera device for preventing dew condensation and a method of assembling the same are provided. The camera device for preventing dew condensation includes a housing, a light-transmissive sheet, a lens module and a waterproof seal. The light-transmissive sheet is sealed and combined with the housing. The lens module is accommodated in the housing, and is connected to and presses against the housing in a direction parallel to an optical axis of the lens module. The waterproof seal is disposed at a location where the lens module connected to the housing to provide a sealed connection. A sealed chamber is formed between the light-transmissive sheet, the housing, the waterproof seal and the lens module.

Description

Photographic device for preventing dew condensation and assembly method thereof

The present invention relates to a photographic device and its assembly method, and in particular to a photographic device for preventing dew condensation and its assembly method.

With the advancement of technology, the applications of photographic devices are becoming more and more diverse. In addition to the handheld camera devices that can be seen everywhere, there are some camera devices that can be used as surveillance devices, network cameras, car cameras, and driving recording cameras.

If the water vapor in the environment where the photographic device is located is saturated in the air, it is easy to condense on the surface with a lower temperature, and condensation occurs near the lens. If dewdrops are formed inside the lens, not only will it affect the observation of the image, but also the dewdrops formed inside the lens will be difficult to eliminate.

The invention relates to a photographic device for preventing dew condensation and its assembly method. A closed chamber is formed between the casing, the light-transmitting sheet, the lens module and the waterproof seal to prevent any external excess moisture from entering the closed chamber.

According to one aspect of the present invention, a camera device for preventing dew condensation is provided, including a casing, a light-transmitting sheet, a lens module, and a waterproof sealing member. The transparent sheet is sealed and combined with the casing. The lens module is accommodated in the casing, and is pressed and connected to the casing in a direction parallel to the optical axis of the lens module. The waterproof seal is arranged at the joint between the lens module and the casing to provide a sealed connection. An airtight chamber is formed among the light-transmitting sheet, the casing, the waterproof seal and the lens module.

According to another aspect of the present invention, a method for assembling a photography device for preventing dew condensation is proposed, including the following steps. The light-transmitting sheet is sealed and combined with the casing. The lens module is press-connected to the housing through the waterproof seal in a direction parallel to the optical axis of the lens module, so that the waterproof seal provides a sealed connection at the joint between the lens module and the housing. An airtight chamber is formed among the light-transmitting sheet, the casing, the waterproof seal and the lens module.

In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are given in detail with reference to the accompanying drawings:

100: Photographic installation

110: shell

111: upper support platform

111e: side edge

112: lower support platform

120: Lens module

121: lens barrel

121b: Flange

121T: threaded part

122: Lens

123: Image sensor

130: waterproof seal

140: translucent film

150: mirror holder

150T: threaded section

160: circuit board

170: screw

180: screw

200: cabinet

D1: the first inner diameter

D2: second inner diameter

D3: Minimum inner diameter

H: Ladder opening

OA: optical axis

SC: closed chamber

Fig. 1 is a perspective view of a photographing device according to an embodiment of the present invention; Fig. 2 is an exploded view of the photographing device in Fig. 1; Fig. 3 is an exploded view of a part of the photographing device in Fig. 1; Fig. 4 is The photographic device of Fig. 1 is a cross-sectional view along section line 4-4'; Fig. 5 is an assembly method of a photographic device according to an embodiment of the present invention; and Fig. 6 is a photographic device according to another embodiment of the present invention assembly method.

Various embodiments of the present invention will be described in detail below and illustrated with accompanying drawings. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments, and any easy substitution, modification, and equivalent change of any of the described embodiments are included in the scope of the present invention, and the following claims The book shall prevail. In the description of the specification, many specific details and implementation examples are provided in order to enable readers to have a more complete understanding of the present invention; however, these specific details and implementation examples should not be regarded as limitations of the present invention. Also, well-known steps or elements have not been described in detail in order to avoid unnecessarily limiting the invention.

FIG. 1 is a perspective view of a photographing device 100 according to an embodiment of the present invention. FIG. 2 is an exploded view of the imaging device 100 in FIG. 1 . Referring to FIG. 1 and FIG. 2 , the camera device 100 may include a housing 110 , a lens module 120 , a waterproof seal 130 , a light-transmitting sheet 140 , a mirror base 150 and a circuit board 160 . The light-transmitting sheet 140 is disposed on the housing 110 , and the lens module 120 , the waterproof seal 130 , the mirror holder 150 and the circuit board 160 are accommodated in the housing 110 .

The lens module 120 may include a lens barrel 121 , a lens 122 , a plurality of lenses (not shown) disposed in the lens barrel 121 , and an image sensor 123 . The lens module 120 has an optical axis OA, which can receive the light beam (from the object side) that passes through the light-transmitting sheet 140. imaging). The image sensor 123 is disposed and electrically connected to the circuit board 160, which is, for example, a charge coupled device (Charge Coupled Device, CCD), Complementary Metal-Oxide Semiconductor (CMOS) elements.

The lens barrel 121 includes a threaded part 121T, and the lens barrel 121 can be fixed on the mirror base 150 by matching the threaded part 121T with the threaded section 150T of the mirror base 150 . Then, the mirror base 150 can be fixed on the circuit board 160 through the screws 170 . Thereby, each component of the lens module 120 can be reliably aligned with the optical axis OA. After the assembly and alignment of the lens module 120 , the mirror base 150 and the circuit board 160 are completed, the circuit board 160 can be fixed on the casing 110 through the screws 180 . In this way, the lens module 120 , the mirror base 150 and the circuit board 160 can be stably arranged in the casing 110 and supported and carried by the casing 110 .

FIG. 3 is an exploded view of a part of the photographing device 100 in FIG. 1 to understand its structure from a bottom perspective. Fig. 4 is a cross-sectional view of the imaging device 100 in Fig. 1 along the secant line 4-4'. Please refer to FIG. 4 , the airtight chamber SC can be formed among the light-transmitting sheet 140 , the casing 110 , the waterproof seal 130 and the lens module 120 . The airtight chamber SC is isolated from the outside world (for example, the external environment where the photographing device 100 is in use, or other areas inside the housing 110 except the airtight chamber SC), and moisture from the outside cannot enter the airtight chamber SC. The moisture content existing in the closed chamber SC has been fixed. Therefore, if the temperature of the current environment where the imaging device 100 is located gradually drops, dewdrops will not be generated on the side of the light-transmitting sheet 140 facing the sealed chamber SC. In one embodiment, the relative humidity (RH) in the airtight chamber SC is less than 15% at room temperature, so the airtight chamber SC is relatively dry, and when low temperature is encountered, no condensation will occur on the light-transmitting sheet 140 . another embodiment Among them, if the relative humidity in the closed chamber SC is less than 10% at room temperature, the effect of preventing condensation will be further improved.

As shown in FIG. 2 , FIG. 3 and FIG. 4 , the light-transmitting sheet 140 and the lens module 120 are sealed and combined with the casing 110 . In one embodiment, the light-transmitting sheet 140 can be sealed and connected to the casing 110 by waterproof glue (not shown). For example, the casing 110 may have a stepped opening H, and form an upper support platform 111 in the stepped opening H, as indicated in FIGS. 2 and 4 . The waterproof glue can be coated on the entire upper supporting platform 111 so that the transparent sheet 140 is sealed and connected to the upper supporting platform 111 . In addition, the waterproof glue can further extend to the side edge 111e of the upper supporting platform 111 to improve the sealing effect.

As shown in FIG. 2 , FIG. 3 and FIG. 4 , the lens module 120 can be hermetically connected to the housing 110 through a waterproof seal 130 . The waterproof seal 130 can be, but not limited to, rubber, silicone or waterproof glue. The waterproof seal 130 is disposed at the joint between the lens module 120 and the housing 110 to provide a sealed connection. In one embodiment, the waterproof seal 130 may be a continuous sealing ring structure, which completely surrounds the joint between the lens module 120 and the casing 110, so as to close the path of entering and exiting the sealed chamber SC from other areas inside the casing 110. . In one embodiment, the waterproof seal 130 is tightly pressed between the casing 110 and the lens module 120 in an interference fit manner. Through the waterproof seal 130 , the lens module 120 can be connected to the casing 110 by pressure in a direction parallel to the optical axis OA.

In one embodiment, as shown in Figures 2 and 4, the lens barrel 121 may have a flange 121b, and the flange 121b protrudes radially; as shown in Figures 3 and 4 As shown, the housing 110 can form a lower supporting platform 112 in the stepped opening H. As shown in FIG. The waterproof seal 130 is disposed between the flange 121b and the lower supporting platform 112, so that the lens module 120 and the casing 110 can press against each other in a direction parallel to the optical axis OA.

Please refer to FIG. 2 , FIG. 3 and FIG. 4 , the upper support platform 111 and the lower support platform 112 face opposite directions respectively. Additionally, the stepped opening H may have a tapered inner diameter. In a specific embodiment, the step opening H has a first inner diameter D1 at the upper support platform 111, as shown in the label of Fig. 2; The direction from the side to the image side) has a tapered inner diameter until it is reduced to a minimum inner diameter D3, as shown in the labels in Figures 2 and 3; and viewed from the other side in Figure 3, the steps After the opening H is reduced to the minimum inner diameter D3, the lower support platform 112 has a second inner diameter D2 greater than the minimum inner diameter D3. Here, the outer diameter of the flange 121b of the lens barrel 121 is greater than the smallest inner diameter D3 of the stepped opening H, so that the radially protruding flange 121b can press the waterproof seal 130 against the lower support platform 112 .

Please refer to FIG. 5 , which is an assembly method of the photographing device 100 according to an embodiment of the present invention. In this embodiment, the assembly and alignment of the lens module 120, the mirror base 150 and the circuit board 160 can be completed first; then, the waterproof seal 130 is placed between the lens module 120 and the housing 110, and through the screw 180 ( As shown in FIG. 2 ), the circuit board 160 is fixed on the casing 110, so that the waterproof seal 130 is pressed and connected to the casing 110 in a direction parallel to the optical axis OA of the lens module 120 to provide a sealed connection. Afterwards, the aforementioned connected components and a light-transmitting sheet 140 are placed together in a low-humidity box 200 , such as a constant temperature and humidity box. At The box 200 can maintain an environment where the temperature is room temperature and the relative humidity is less than 15%. In a preferred embodiment, an environment with room temperature and relative humidity less than 10% can be maintained in the box 200 . Then, under the environmental conditions of the box body 200, the step of sealing the light-transmitting sheet 140 and the housing 110 is carried out to form a closed chamber SC, as shown in Figure 4, to ensure that the water in the closed chamber SC The gas content is not enough to produce dewdrops on the side of the transparent sheet 140 facing the closed chamber SC.

In another embodiment, as shown in FIG. 6 , it is an assembly method of the photographing device 100 according to another embodiment of the present invention. In this embodiment, the steps of assembling and aligning the lens module 120 , the mirror base 150 and the circuit board 160 are completed first. Then, the assembled and aligned lens module 120 , the mirror base 150 and the circuit board 160 together with the casing 110 and the waterproof seal 130 are placed in the low-humidity box 200 . Then, carry out the steps of sealing connection of the lens module 120, the waterproof seal 130 and the housing 110 in the box body 200, for example, the waterproof seal 130 is placed between the lens module 120 and the housing 110, and through the screw 180 (shown in FIG. 2 ) the circuit board 160 is fixed on the casing 110, so that the waterproof seal 130 is pressed and connected to the casing 110 in a direction parallel to the optical axis OA of the lens module 120 to provide a sealed connection, so as to A closed chamber SC is formed.

As mentioned above, the present invention forms a closed chamber among the casing, the light-transmitting sheet, the lens module and the waterproof seal to prevent any external excess moisture from entering the closed chamber. Further, the relative humidity in the airtight chamber can also be allowed to be less than 15% at room temperature, preferably, the relative humidity in the airtight chamber can be allowed to be less than 15% at room temperature. To ensure that the moisture content in the airtight chamber does not produce dewdrops on the side of the light-transmitting sheet facing the airtight chamber.

The photography device 100 of the embodiment of the present invention can itself be a network camera, for example, and can also be used with the following example devices: a Mesh wireless router with built-in smart speakers, a high-definition large-screen smart conference call device based on the Android system, and a tri-band device supporting 6GHz High-end XGS-PON home access gateway....

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

100: Photographic installation

110: shell

111: upper support platform

112: lower support platform

120: Lens module

121: lens barrel

121b: Flange

122: Lens

123: Image sensor

130: waterproof seal

140: translucent film

150: mirror holder

160: circuit board

170: screw

SC: closed chamber

Claims (10)

A photographic device for preventing condensation, comprising: a casing; a light-transmitting sheet sealed and combined with the casing; a lens module, accommodated in the casing, and abutting against the optical axis parallel to the lens module. Pressingly connected to the casing, wherein the lens module includes a lens barrel, the lens barrel has a radially protruding flange; and a waterproof seal, arranged at the connection between the flange and the casing to provide sealing connection; wherein, a sealed chamber is formed among the light-transmitting sheet, the casing, the waterproof seal and the lens module. The dew condensation-preventing photography device according to claim 1, wherein the relative humidity in the airtight chamber is less than 15% at room temperature. The camera device for preventing condensation according to claim 1, wherein the waterproof sealing member is a continuous sealing ring structure. The camera device for preventing dew condensation according to claim 1, wherein the waterproof seal is tightly pressed between the casing and the lens module in an interference fit manner. The camera device for preventing condensation as described in claim 1, wherein the casing has a stepped opening and an upper support platform is formed in the stepped opening, and the light-transmitting sheet is sealed and connected to the upper support platform by a waterproof glue. The camera device for preventing dew condensation as described in claim 5, wherein the housing also forms a lower support platform in the stepped opening, the waterproof seal is arranged between the flange and the lower support platform, and the upper support platform and The lower support platforms respectively face in opposite directions. The camera device for preventing dew condensation according to claim 6, wherein the stepped opening has an inner diameter tapered from the upper support platform to the lower support platform, and the outer diameter of the flange of the lens barrel is larger than the step The smallest inner diameter of the tapered opening is smaller than the largest inner diameter of the stepped opening. A method for assembling a photography device for preventing condensation, comprising: a light-transmitting sheet is hermetically bonded to a housing; The casing, wherein the lens module includes a lens barrel, the lens barrel has a radially protruding flange, and the waterproof seal provides a sealed connection at the junction of the flange and the casing; wherein, the transparent A closed chamber is formed among the optical sheet, the casing, the waterproof seal and the lens module. The method for assembling a photographic device for preventing dew condensation as described in claim 8, wherein the step of sealing and combining the light-transmitting sheet with the casing is to use the waterproof seal on the lens module in parallel to the light of the lens module. The step of press-connecting the casing in the axial direction is performed after the step, and the step of sealing and combining the light-transmitting sheet with the casing is carried out in an environment with a relative humidity of less than 15% at room temperature. The method for assembling a photographic device for preventing dew condensation as described in claim 8, wherein the step of connecting the lens module to the casing in a direction parallel to the optical axis of the lens module by the waterproof seal is at The step of sealing and bonding the light-transmitting sheet to the casing is carried out, and the step of connecting the lens module to the casing in a direction parallel to the optical axis of the lens module through the waterproof seal is in the chamber. Carried out in an environment with a relative humidity of less than 15%.

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