CN219018921U - Lens module and vehicle-mounted image pickup apparatus having the same - Google Patents

Abstract

The utility model provides a lens module and vehicle-mounted camera equipment with the same, wherein the lens module comprises a lens, a shell, a fan assembly and a PCB assembly, the shell comprises a front shell and a rear shell, and the front shell and the rear shell enclose a cavity; the lens is arranged on the front shell; at least two opposite side surfaces of the shell are respectively provided with a ventilation opening, and a cavity enclosed by the front shell and the rear shell forms a main air flow channel through the two ventilation openings which are oppositely arranged; a fan assembly is arranged at the position of at least one ventilation opening; the PCB assembly is mounted in the cavity. The cavity enclosed by the front shell and the rear shell of the lens module forms a main air flow channel through two air vents which are oppositely arranged, and the fan assembly is arranged at the air vents, so that the air flow inside and outside the lens module can be exchanged, and the heat dissipation performance of the lens module is improved.

Description

Lens module and vehicle-mounted image pickup apparatus having the same

Technical Field

The utility model relates to the technical field of lens modules, in particular to a lens module and vehicle-mounted image pickup equipment with the lens module.

Background

Along with the continuous updating and upgrading of the auxiliary safety system of the vehicle, the requirements on the definition and the volume and the weight of the lens module of the vehicle-mounted image pickup device are continuously improved. On the one hand, with the improvement of the image definition, the total power consumption of the image processor is continuously increased, so that the working temperature of the vehicle-mounted lens module is higher and higher. On the other hand, along with the downsizing of the vehicle-mounted lens module, the space inside the vehicle-mounted lens module is also continuously reduced, and heat is accumulated in a narrow internal space and cannot be dissipated in time, so that the heat dissipation efficiency of the lens module is reduced.

Because the on-vehicle camera lens module is easily influenced by external environment in the use process, for example, factors such as high temperature, humidity, internal and external pressure difference, seasonal temperature difference and the like, the following defects easily exist:

(1) The chip inside the vehicle-mounted lens module has over-high heating temperature or low ambient temperature, and the lens and the chip can influence the imaging quality and the focusing range under the conditions of thermal expansion and cold contraction; the service lives of the chip and other electronic elements in the vehicle-mounted lens module are shortened, and particularly in the intelligent vehicle-mounted field, if the vehicle-mounted lens module is damaged, the personal safety and the traffic safety are seriously affected;

(2) The lens module is subjected to the influence of complex environments such as high temperature, high humidity, internal and external pressure difference and the like in a vehicle-mounted environment, and vapor and water mist are easily formed on the inner side of a lens in the lens module, so that the service life of an electronic device is reduced, and the safety such as the resolution of the lens, the imaging quality and the like are influenced.

Disclosure of Invention

In view of the above-mentioned shortcomings, the present utility model is directed to a lens module and a vehicle-mounted camera device with the lens module, so as to improve the heat dissipation effect of the vehicle-mounted lens module, maintain the temperature difference, pressure difference and temperature and humidity balance inside and outside the lens module, prevent the formation of water mist inside the lens module, and ensure the service life of the lens module.

The utility model provides a lens module, comprising:

a lens;

the shell comprises a front shell and a rear shell, and the front shell and the rear shell enclose a cavity; the lens is arranged on the front shell; at least two opposite side surfaces of the shell are respectively provided with a ventilation opening, and a cavity enclosed by the front shell and the rear shell forms a main air flow channel through the two ventilation openings which are arranged oppositely;

the fan assembly is arranged at the position of at least one ventilation opening;

and the PCB assembly is fixedly arranged in the cavity, and the main air flow channel passes through the PCB assembly.

Further, the lens module further comprises an electric connector, and the electric connector is mounted on the rear shell; one end of the electric connector extends into the cavity and is electrically connected with the PCB assembly; the other end of the electric connector extends out of the outer shell and is used for electrically connecting the lens module with external equipment.

Further, the PCB assembly comprises a first circuit board and a second circuit board which are connected with each other, a gap is formed between the first circuit board and the second circuit board through a stand column, and the main air flow channel passes through the gap.

Further, the ventilation opening is formed in the front shell, the first circuit board is fixed to the front shell through a first screw, and the second circuit board is fixed to the front shell through a second screw and penetrates through the first circuit board.

Further, the first circuit board is provided with a temperature and humidity sensor, and the temperature and humidity sensor is electrically connected with the first circuit board; the second circuit board is provided with an image sensor, the image sensor is electrically connected with the second circuit board, and the first circuit board is electrically connected with the second circuit board, namely, the temperature and humidity sensor is electrically connected with the image sensor.

Further, two ends of the gap between the first circuit board and the second circuit board are respectively connected with two air ventilation openings which are oppositely arranged, and the width of the gap is the same as the diameter of the air ventilation openings.

Further, a heating element is further arranged on the first circuit board, and the heating element is electrically connected with the temperature and humidity sensor on the first circuit board.

Further, waterproof breathable films are arranged at the positions of the breathable openings.

Further, a waterproof rubber ring is arranged at the joint between the front shell and the rear shell.

The utility model also provides vehicle-mounted image pickup equipment comprising the lens module.

The lens module and have on-vehicle camera equipment of this lens module that this embodiment provided, its beneficial effect lies in:

(1) The front shell and the rear shell enclose the cavity to form a main air flow channel through the two opposite ventilation openings, so that the air flow inside and outside the lens module can be exchanged, and the heat dissipation inside the cavity is facilitated;

(2) The ventilation opening is provided with a fan assembly to accelerate the exchange of air flow inside and outside the lens module, thereby realizing the balance of temperature difference, pressure difference and temperature and humidity inside and outside the lens module, improving the heat dissipation performance of the lens module, reducing the formation of water vapor mist, reducing the influence of imaging quality caused by expansion and contraction of the lens module in a high-temperature environment, and improving the stability of the lens module;

(3) The temperature and humidity sensor and the heating element are arranged on the PCB assembly, the internal environment of the lens module is monitored through the temperature and humidity sensor, when the temperature and humidity sensor monitors that the internal environment is low or the humidity is high, the heating element is started, so that the influence of imaging quality caused by lens frost and freezing and expansion and contraction under the low-temperature environment is prevented, meanwhile, the relatively balanced working temperature environment of components at the inner side of the PCB assembly is maintained, and the service life of key electronic components is prolonged; when the temperature and humidity sensor monitors that the internal temperature is too high, the fan assembly is started, so that the inside and outside of the lens module are ventilated, and the PCB assembly is radiated.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a lens module according to an embodiment of the utility model.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic cross-sectional view of fig. 1.

Fig. 4 is a schematic structural diagram of a first circuit board according to an embodiment of the utility model.

Fig. 5 is a schematic structural diagram of a second circuit board according to an embodiment of the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, an embodiment of the utility model provides a lens module, which includes a lens 10, a housing 20, a fan assembly 30 and a PCB assembly 40, wherein the housing 20 includes a front housing 21 and a rear housing 22, and the front housing 21 and the rear housing 22 are fastened to each other and enclose a cavity for the PCB assembly 40 to install; the lens 10 is mounted on the front case 21, and a mounting hole (not shown) for mounting the lens 10 is formed in the front case 21, and the lens 10 is mounted on the mounting hole. At least two opposite side surfaces 212 of the outer shell 20 are respectively provided with a ventilation opening 23, and a main air flow channel is formed by the two ventilation openings 23 which are oppositely arranged in the cavity enclosed by the front shell 21 and the rear shell 22. In the present embodiment, two ventilation ports 23 are provided. Specifically, each ventilation opening 23 is adhered with a waterproof and breathable film 24 for the lens module to exchange internal and external airflows and play a role in waterproof and dustproof.

The fan assembly 30 is installed at the at least one ventilation opening 23 to accelerate the air inside the cavity and outside the lens module to flow in the main air flow channel, so that the lens module realizes the balance of temperature difference between inside and outside, pressure difference and temperature and humidity, accelerates the heat dissipation of the lens module and reduces the formation of water vapor and water mist inside the lens module. The lens module is reduced in the high-temperature and high-humidity environment, the service life and imaging stability of key elements inside the module are improved due to the influence of imaging quality caused by thermal expansion and cold contraction, and particularly, the fan assembly 30 can be installed and fixed on the outer wall or the inner wall of the front shell 21, but needs to correspond to the position of the ventilation opening 23 so as to promote air circulation in the cavity.

The PCB assembly 40 is fixedly mounted in the cavity, and the main air flow channel passes through a local area of the PCB assembly 40, so that external air enters the main air flow channel under the action of the fan assembly 30, thereby taking away heat of the PCB assembly 40, and achieving heat dissipation of chips on the PCB board and other accessories on the PCB assembly 40.

In this embodiment, two ventilation ports 23 are provided, and a fan assembly 30 is installed at one of the ventilation ports 23, and when the fan assembly 30 is turned on, among the ventilation ports 23 that are oppositely arranged, one ventilation port 23 is an air inlet, and the other ventilation port 23 is an air outlet, and the air outside the lens module enters through the ventilation port 23 and passes through the main air flow channel and flows out through the other ventilation port 23, so as to be used for exchanging air flows inside and outside the lens module, thereby facilitating the heat dissipation inside the cavity.

In other embodiments, the fan assemblies 30 are disposed at two opposite ventilation openings 23, and the rotation directions of the two fan assemblies 30 are the same, so that one ventilation opening 23 is an air inlet, the other ventilation opening 23 is an air outlet, among the two ventilation openings 23 disposed opposite to each other, firstly, the air outside the lens module passes through one ventilation opening 23 serving as the air inlet, and the fan assemblies 30 at the ventilation openings 23 rotate, so that the air outside the lens module flows into the main air flow channel, secondly, the air passes through the main air flow channel and flows to the other ventilation opening 23 serving as the air outlet, and the air in the main air flow channel is discharged to the outside of the lens module by rotating the other fan assembly 30 with the same rotation direction, thereby realizing the internal and external air flow exchange of the lens module, and performing the heat dissipation operation to the inside of the cavity.

The PCB assembly 40 is fixedly mounted in the cavity, and the PCB assembly 40 cooperates with the lens 10 to realize an imaging function of the lens module.

Specifically, the ventilation opening 23 is provided on the front case 21, and the PCB assembly 40 includes a first circuit board 41 and a second circuit board 42 connected to each other, wherein the first circuit board 41 is fixed to the bottom of the front case 21 by a first screw; the second circuit board 42 is fixed to the bottom of the front case 21 after passing through the first circuit board 41 by a second screw, and a stand column is sleeved between the first circuit board 41 and the second circuit board 42 by the second screw, so that a gap exists between the first circuit board 41 and the second circuit board 42.

In the present embodiment, the first circuit board 41 and the second circuit board 42 are each provided with 4 through holes, and the through holes are all distributed at four corners of the first circuit board 41 or the second circuit board 42. First screws are provided on any two through holes located on the diagonal line on the first circuit board 41, and the first circuit board 41 is fixed to the bottom of the front case 21 by the first screws. The other two through holes of the first screw which are not installed are used for the second screw to pass through. A second screw is installed at a corresponding through hole on the second circuit board 42 and passes through the first circuit board 41 such that the second circuit board 42 and the first circuit board 41 are combined installed at the bottom of the front case 21. The second screw is located the cover and is equipped with the stand between first circuit board 41 and the second circuit board 42, the inside of stand is equipped with the hole that supplies the second screw to pass, and form the clearance between first circuit board 41 and the second circuit board 42 is ensured to the stand, and, main air current passageway in the cavity passes the clearance (as shown in fig. 3), main air current passageway's access port corresponds with ventilative mouth 23, when main air current passageway has the gas to flow, it can take away the heat that produces on first circuit board 41 and the second circuit board 42 chip and other electronic components operation, thereby avoid PCB subassembly 40 high temperature, influence its life.

Specifically, two ends of the gap between the first circuit board 41 and the second circuit board 42 are respectively connected to two opposite ventilation openings 23, and the width of the gap is the same as the diameter of the ventilation opening 23, so that the main gas flow channel and the gap are overlapped, when the main gas flow channel has gas flowing, the flow quantity of the gas passing through the ventilation opening 23 is balanced, and the problem that the flow quantity of the gas is reduced because the width of the gap is larger than the diameter of the ventilation opening 23 is avoided.

It should be noted that the first circuit board 41 is disposed near the rear case 22. The second circuit board 42 is disposed close to the lens 10.

Referring to fig. 4 and 5, the first circuit board 41 is provided with a temperature and humidity sensor 411, and the first circuit board 41 is electrically connected with the temperature and humidity sensor 411, preferably the temperature and humidity sensor 411 is mounted on one surface of the first circuit board 41 close to the second circuit board 42. The second circuit board 42 is provided with an image sensor 421, the image sensor 421 is electrically connected to the second circuit board 42, and the first circuit board 41 is electrically connected to the second circuit board 42. In actual use, the PCB assembly 40 further includes other electronic components, such as a controller, etc., which may be mounted on the first circuit board 41 or the second circuit board 42 according to actual situations, which is not limited in the present utility model.

The first circuit board 41 is further provided with a heating element 412, and the heating element 412 is electrically connected with the temperature and humidity sensor 411 on the first circuit board 41. The heating element 412 prevents the lens from frosting and freezing and the imaging quality caused by thermal expansion and contraction in low-temperature environment, and maintains the relatively balanced working temperature environment of the components inside the PCB assembly 40, thereby increasing the service life of the key electronic components.

Preferably, the heating element 412 is a heat generating resistor.

The temperature and humidity sensor 411 is used for sensing the temperature and humidity environment inside the cavity, and the temperature and humidity monitored by the temperature and humidity sensor 411 can automatically control whether the fan assembly 30 and the heating element 412 are turned on or not. When the temperature and humidity sensor 411 detects that the temperature in the cavity is low or the humidity is high, the heating element 412 is controlled to heat, so as to prevent the lens from frosting and maintain the relatively balanced working temperature environment of the components inside the PCB assembly 40. When the temperature and humidity sensor 411 detects that the temperature in the cavity is high, the fan assembly 30 is controlled to start.

The lens module further includes an electrical connector 50, the electrical connector 50 being mounted on the rear housing 22. One end of the electrical connector 50 extends into the cavity such that the electrical connector 50 is electrically connected to the PCB assembly 40. The other end of the electrical connector 50 extends out of the housing 20 for electrically connecting the lens module with other components. The other component may be, for example, a car machine, and may be a car-mounted image pickup apparatus for controlling the lens module.

A waterproof rubber ring 60 is provided at the junction between the front case 21 and the rear case 22 to prevent water vapor from entering into the cavity from the junction between the front case 21 and the rear case 22. Specifically, as shown in fig. 3, the upper end portion of the rear shell 22 corresponding to the bottom of the front shell 21 is provided with a groove (not shown) for installing and fixing the waterproof rubber ring 60, when the rear shell 22 is fastened with the front shell 21, the bottom of the front shell 21 abuts against the waterproof rubber ring 60 to realize the waterproof and sealing functions of the junction between the front shell 21 and the rear shell 22, in other embodiments, the bottom of the front shell 21 corresponding to the upper end portion of the rear shell 22 may be provided with a groove for installing and fixing the waterproof rubber ring 60, and when the front shell 21 and the rear shell 22 are fastened, the upper end portion of the rear shell 22 abuts against the waterproof rubber ring 60 to realize the waterproof and sealing functions of the junction between the front shell 21 and the rear shell 22.

The embodiment of the utility model also provides vehicle-mounted image pickup equipment which comprises the lens module.

The lens module and have on-vehicle camera equipment of this lens module that this embodiment provided, its beneficial effect lies in:

(1) The ventilation openings 23 are respectively formed on at least two opposite side surfaces 212 of the front shell 21, and the cavity enclosed by the front shell 21 and the rear shell 22 forms a main air flow channel through the two oppositely arranged ventilation openings 23, so that the air flow inside and outside the lens module can be exchanged, and the heat dissipation inside the cavity is facilitated;

(2) The ventilation port 23 is provided with a fan assembly 30 to accelerate the exchange of air flow inside and outside the lens module, thereby realizing the balance of temperature difference, pressure difference and temperature and humidity inside and outside the lens module, improving the heat dissipation performance of the lens module, reducing the formation of water vapor mist, reducing the influence of imaging quality caused by expansion and contraction of the lens module in a high-temperature environment, and improving the stability of the lens module;

(3) The temperature and humidity sensor 411 and the heating element 412 are arranged on the PCB assembly 40, the internal environment of the lens module is monitored through the temperature and humidity sensor 411, when the temperature and humidity sensor 411 monitors that the internal environment is low or the humidity is high, the heating element 412 is started to prevent the lens 10 from frosting and freezing and the influence of imaging quality caused by expansion and contraction under low-temperature environment, meanwhile, the relatively balanced working temperature environment of the components at the inner side of the PCB assembly 40 is maintained, and the service life of key electronic components is prolonged; when the temperature and humidity sensor 411 detects that the internal temperature is too high, the fan assembly 30 is turned on, so that the inside and outside of the lens module are ventilated, and the PCB assembly 40 is cooled.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. A lens module, comprising:

a lens (10);

a housing (20), wherein the housing (20) comprises a front housing (21) and a rear housing (22), and the front housing (21) and the rear housing (22) enclose a cavity; the lens (10) is mounted on the front housing (21); at least two opposite side surfaces (212) of the shell (20) are respectively provided with a ventilation opening (23), and a cavity enclosed by the front shell (21) and the rear shell (22) forms a main air flow channel through the two ventilation openings (23) which are oppositely arranged;

a fan assembly (30) mounted at least one of said ventilation openings (23);

and the PCB assembly (40) is fixedly arranged in the cavity, and the main air flow channel passes through the PCB assembly (40).

2. The lens module according to claim 1, further comprising an electrical connector (50), the electrical connector (50) being mounted on the rear housing (22); one end of the electrical connector (50) extends into the cavity and is electrically connected with the PCB assembly (40); the other end of the electric connector (50) extends out of the outer shell (20) and is used for electrically connecting the lens module with external equipment.

3. The lens module according to claim 1, wherein the PCB assembly (40) comprises a first circuit board (41) and a second circuit board (42) connected to each other, a gap being formed between the first circuit board (41) and the second circuit board (42) by a post, the main air flow passage passing through the gap.

4. A lens module according to claim 3, wherein the ventilation opening (23) is provided in the front case (21), the first circuit board (41) is fixed to the front case (21) by a first screw, and the second circuit board (42) is fixed to the front case (21) by a second screw and through the first circuit board.

5. A lens module according to claim 3, wherein the first circuit board (41) is provided with a temperature and humidity sensor (411), and the temperature and humidity sensor (411) is electrically connected with the first circuit board (41); the second circuit board (42) is provided with an image sensor (421), the image sensor (421) is electrically connected with the second circuit board (42), and the first circuit board (41) is electrically connected with the second circuit board (42), namely, the temperature and humidity sensor (411) is electrically connected with the image sensor (421).

6. A lens module according to claim 3, wherein two ends of the gap between the first circuit board (41) and the second circuit board (42) are respectively connected to two air-permeable openings (23) which are oppositely arranged, and the width of the gap is the same as the diameter of the air-permeable opening (23).

7. The lens module according to claim 5, wherein the first circuit board (41) is further provided with a heating element (412), and the heating element (412) is electrically connected to the temperature and humidity sensor (411) on the first circuit board (41).

8. Lens module according to claim 1, characterized in that a waterproof and breathable membrane (24) is provided at each of the ventilation openings (23).

9. Lens module according to claim 1, characterized in that a waterproof rubber ring (60) is provided at the connection between the front housing (21) and the rear housing (22).

10. A vehicle-mounted image pickup apparatus comprising the lens module according to any one of claims 1 to 9.

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