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CN-121995684-A - Vehicle-mounted camera

CN121995684ACN 121995684 ACN121995684 ACN 121995684ACN-121995684-A

Abstract

To a vehicle-mounted camera. The heat from the heater part, from which raindrops, freezing, etc. of the first lens are removed, is suppressed from being directly diffused to the metal lens barrel with high heat conductivity. The in-vehicle camera includes a lens barrel including at least a first lens and a second lens, an imaging element, a circuit board connector, a housing, and a connector. The lens barrel has an inner side surface and an outer side surface. The first lens has first and second lens surfaces and a first lens side connecting the first and second lens surfaces. The second lens has third and fourth lens surfaces, and a second lens side connecting the third and fourth lens surfaces. The second lens surface has a first region and a second region outside the first region. The lens barrel includes a heater portion disposed between a portion of the second lens surface and a portion of the third lens surface so as to extend along at least a portion of the second region of the second lens surface, and a resin member disposed between the inner surface and the first lens surface.

Inventors

  • Qing Shuitai

Assignees

  • 松下汽车电子系统株式会社

Dates

Publication Date
20260508
Application Date
20250924
Priority Date
20241106

Claims (18)

  1. 1. A vehicle-mounted camera is provided with; a metal lens barrel having a first tubular shape along an optical axis, a first end portion of the first tubular shape, a second end portion of the first tubular shape opposite to the first end portion, and a lens including at least a first lens and a second lens arranged along the optical axis; An image pickup element disposed on the optical axis at a position closer to the second end than to the first end of the first tube of the lens barrel; A circuit board having a first surface and a second surface opposite to the first surface, the image pickup element being disposed on the first surface; A circuit board connector disposed on the circuit board; A housing supporting the lens barrel and accommodating the image pickup element and the circuit board, and A connector disposed on at least a part of the housing and electrically connected to the circuit board connector, Wherein the first cylinder of the lens barrel has an inner side surface and an outer side surface, The first lens and the second lens of the lens barrel are adjacently arranged, The first lens of the lens barrel is disposed farther than the second lens with respect to the first surface of the circuit board in a direction along the optical axis, The first lens of the lens barrel includes: a first lens surface through which the optical axis passes; A second lens surface opposite to the first lens surface and passing through the optical axis, and A first lens side connecting the first lens surface and the second lens surface, The second lens of the lens barrel includes: a third lens surface through which the optical axis passes; A fourth lens surface through which the optical axis passes and which is opposite to the third lens surface, and A second lens side connecting the third lens face and the fourth lens face, The second lens surface of the first lens of the lens barrel has: a first region through which the optical axis passes, and A second region which is located outside the first region with respect to the optical axis and is provided so as to surround the first region, The lens barrel includes: a first ring-shaped heater part arranged between a part of the second lens surface of the first lens and a part of the third lens surface of the second lens so as to be along at least a part of the second region of the second lens surface of the first lens, and And a second annular resin member disposed between the inner side surface of the first tubular body and the first lens side surface of the first lens.
  2. 2. The in-vehicle camera according to claim 1, wherein, The second annular shape of the resin member of the lens barrel includes: A first resin surface; a second resin surface opposite to the first resin surface; A resin inner surface connecting the first resin surface and the second resin surface, and A resin outer surface which is located outside the resin inner surface with respect to the optical axis and connects the first resin surface and the second resin surface, At least a portion of the resin inner side surface of the resin member is in contact with the first lens side surface of the first lens, At least a part of the resin outer surface of the resin member is in contact with the inner surface of the first cylinder of the lens barrel.
  3. 3. The in-vehicle camera according to claim 2, wherein, The third lens surface of the second lens of the lens barrel has: A third region through which the optical axis passes, and A fourth region located outside the third region, The first annular shape of the heater portion of the lens barrel includes: A first heater surface; a second heater face opposite the first heater face; A heater inner surface connecting the first heater surface and the second heater surface, and A heater outer surface which is located outside the heater inner surface with respect to the optical axis and connects the first heater surface and the second heater surface, The first heater surface of the heater portion is in contact with the at least a portion of the second region of the second lens surface of the first lens.
  4. 4. The in-vehicle camera according to claim 3, wherein, The heater outer side surface of the heater portion of the lens barrel is separated from the resin inner side surface of the resin member.
  5. 5. The in-vehicle camera according to claim 4, wherein, A thickness between the third region of the third lens face of the second lens and the fourth lens face of the second lens, i.e., a first thickness, is greater than a thickness between the fourth region of the third lens face of the second lens and the fourth lens face of the second lens, i.e., a second thickness.
  6. 6. The in-vehicle camera according to claim 3, wherein, The heater section of the lens barrel includes a lead section having a first lead end and a second lead end opposite to the first lead end, The first wire end of the wire portion is connected to the heater portion, The second wire end of the wire part is electrically connected with the circuit substrate, The resin member has a resin notched portion notched from the resin inner surface to the resin outer surface in a part of the second resin surface, A part of the wire portion is disposed in the resin cutout portion of the resin member.
  7. 7. The in-vehicle camera according to claim 6, wherein, The lead portion of the heater portion of the lens barrel is electrically connected to the circuit board so as to pass between the inner side surface and the outer side surface of the first tubular shape of the lens barrel.
  8. 8. The in-vehicle camera according to claim 1, wherein, Further comprising a third cylindrical resin holding member provided around the first end of the lens barrel, The third cylindrical holding member has: a first portion in contact with the first end of the first tube and a peripheral edge of the first lens face of the first lens, and And a second portion fixed to a part of the outer side surface of the first cylinder of the lens barrel.
  9. 9. The in-vehicle camera according to claim 8, wherein, The lens barrel further includes an elastic member disposed between the first portion of the holding member and a first resin surface of the resin member, and disposed between the first lens side surface of the first lens and the inner side surface of the first cylinder of the lens barrel.
  10. 10. The in-vehicle camera according to claim 9, wherein, The elastic member is an O-ring.
  11. 11. The in-vehicle camera according to claim 1, wherein, The first lens of the lens barrel is a lens farthest from the image pickup element, The heater portion of the lens barrel is capable of heating the first lens of the lens barrel.
  12. 12. The in-vehicle camera according to claim 1, wherein, The heater part of the lens barrel is a positive temperature coefficient heater, PTC heater.
  13. 13. The in-vehicle camera according to claim 1, wherein, When the in-vehicle camera is disposed in a vehicle, the connector is electrically connected to a cable of the vehicle.
  14. 14. The in-vehicle camera according to claim 1, wherein, The circuit substrate connector is disposed on the second surface of the circuit substrate.
  15. 15. The in-vehicle camera according to claim 1, wherein, The circuit substrate includes a first circuit substrate and a second circuit substrate.
  16. 16. The in-vehicle camera according to claim 1, wherein, The connector is a coaxial connector having a signal terminal and a ground terminal.
  17. 17. The in-vehicle camera according to claim 1, wherein, The shell is in a second cylindrical shape, The housing is provided with: A third end of the second cylinder, and A fourth end portion of the second tube shape, opposite to the third end portion, disposed farther than the third end portion of the second tube shape with reference to the first end portion of the first tube shape of the lens barrel, The third end of the second cylinder supports the lens barrel, The connector is disposed at least in part on the fourth end of the second tubular portion of the housing.
  18. 18. The in-vehicle camera according to claim 1, wherein, The shell is made of metal.

Description

Vehicle-mounted camera Technical Field The present disclosure relates to an in-vehicle camera. In recent years, along with demands for improvement of safety of a vehicle, introduction of an automatic driving function, and the like, development of an in-vehicle camera mounted on the vehicle and capturing images of the inside and the outside of the vehicle has been actively carried out (for example, refer to patent literature 1). Prior art literature Patent literature Patent document 1 International publication No. 2019/225745 Patent document 2 International publication No. 2021/075372 Disclosure of Invention Problems to be solved by the invention The vehicle-mounted camera is required to have a further improved performance, while the level of safety, autopilot functions, and the like required for the vehicle are improved. The present disclosure relates to a technique of providing a new in-vehicle camera. Solution for solving the problem The present disclosure relates to an in-vehicle camera including a metal barrel having a first cylindrical shape along an optical axis, a first end portion of the first cylindrical shape, a second end portion of the first cylindrical shape opposite to the first end portion, and a lens including at least a first lens and a second lens arranged along the optical axis, an imaging element arranged on the optical axis and at a position closer to the second end portion than a distance from the first end portion of the first cylindrical shape, a circuit board having a first surface and a second surface opposite to the first surface, the imaging element being arranged on the first surface, a circuit board connector arranged on the circuit board, a housing supporting the barrel and accommodating the imaging element and the circuit board, and a connector arranged on at least a first portion of the housing and electrically connected to the circuit board connector, wherein the first cylindrical shape has an inner side surface and an outer side surface, the first lens and the second lens barrel being arranged on the first side surface opposite to the first lens axis and the first lens barrel, the first lens being arranged on the first side opposite to the first lens barrel and the second lens and the first lens barrel being arranged on the circuit board, the second lens of the lens barrel includes a third lens surface through which the optical axis passes, a fourth lens surface opposite to the third lens surface through which the optical axis passes, and a second lens side surface connecting the third lens surface and the fourth lens surface, the second lens surface of the first lens of the lens barrel includes a first region through which the optical axis passes, and a second region that is located outside the first region with respect to the optical axis and is provided so as to surround the first region, and the lens barrel includes a first ring-shaped heater portion that is disposed between a portion of the second lens surface of the first lens and a portion of the third lens surface of the second lens so as to extend along at least a portion of the second region of the second lens surface of the first lens, and a second ring-shaped resin member that is disposed between the inner side surface of the first cylinder and the first lens side surface. ADVANTAGEOUS EFFECTS OF INVENTION According to the present disclosure, since the resin member is disposed on the first lens side surface of the first lens, it is possible to suppress direct diffusion of heat from the heater portion for removing foreign matter such as raindrops or freezing adhering to the first lens to the metal lens barrel having high thermal conductivity. Drawings Fig. 1 is a plan view of a vehicle with an in-vehicle camera mounted thereon, as an example of the vehicle. Fig. 2 is a block diagram showing an example of connection between the in-vehicle camera, the camera ECU, and the display provided in the vehicle shown in fig. 1. Fig. 3 is a schematic view of a vehicle cabin of a vehicle equipped with an in-vehicle camera. Fig. 4 is a top view of the vehicle of fig. 3. Fig. 5 is a block diagram showing an example of connection of a camera ECU and a display provided in the vehicle shown in fig. 3. Fig. 6 is a front perspective view of the in-vehicle camera of the first embodiment. Fig. 7 is an exploded perspective view of the in-vehicle camera of the first embodiment. Fig. 8 is a plan view of the in-vehicle camera of the first embodiment. Fig. 9 is a perspective view showing a section taken along the line I-I of fig. 8 in the vicinity of the first end of the barrel of the in-vehicle camera of the first embodiment. Fig. 10 is an exploded perspective view of the in-vehicle camera of the second embodiment. Fig. 11 is a sectional view taken along the line I-I of fig. 8 in the in-vehicle camera of the second embodiment. Fig. 12 is a sectional view taken along line II-II of fig. 8 in the in-vehicle camera of the second embodiment.