JP5895835B2 - In-vehicle camera device - Google Patents

Description

The present invention relates to an in-vehicle camera device, and more particularly to a housing structure in which lenses with different flange backs are mounted in the same housing, and a waterproof structure thereof.

2. Description of the Related Art An in-vehicle camera device that includes a lens and an image sensor that is used for a vehicle back monitor or the like is known, and in recent years, the in-vehicle camera device has been required to be downsized with the spread. However, when a housing in which a lens and an image sensor are integrated in order to achieve miniaturization, the distance of the flange back varies depending on the type of lens, so when producing an in-vehicle camera device with a different type of lens, Manufacturing a plurality of housings corresponding to the distance of the flange back of each lens has made it difficult to reduce costs.

Against this background, there has been proposed a camera module that can adjust the relative position between the lens and the image sensor while the lens is fixed to the case. (For example, refer to Patent Document 1). In addition, an imaging apparatus including a spacer that adjusts the distance between the lens and the imaging element has been proposed (see, for example, Patent Document 2).

JP 2007-4068 A (pages 4-5, FIG. 1) JP 2009-194543 A (pages 5-6, FIG. 1)

Patent Documents 1 and 2 are camera devices that can adjust the distance from the lens to the image sensor according to the distance of the flange back of the lens. Both camera devices are matched to a lens with a long flange back distance. Since the length of the casing must be set, there is a problem that the casing cannot be shortened even when a lens with a short flange back distance is used. In addition, in the manufacturing process for assembling the camera device, in order to fix the position of the imaging device, it is necessary to perform a soldering operation or an operation of inserting a spacer having a length corresponding to the distance of the lens flange back. There was also a problem that was bad.

The present invention solves the above-mentioned problems, makes it possible to adjust the distance of the flange back with respect to different types of lenses with a simple operation, and the shorter the flange back distance of the lens while it is the same housing, It is an object of the present invention to provide a vehicle-mounted camera that can shorten the length of a housing.

In order to solve the above-mentioned problems, the present invention according to claim 1 of the present invention comprises a cylindrical first housing and a columnar second housing housed in the first housing. In the in-vehicle camera device, the first casing includes a lens at one end, an opening at the other end, a storage section for storing the second casing inside, and a predetermined depth on an inner peripheral wall of the storage section. A plurality of concave grooves formed with different lengths from the other end of the first housing toward the one end, and the second housing has a light imaged from the lens at one end. An image sensor that converts a signal into an electrical signal, a circuit board that processes a signal output from the image sensor, a predetermined height on the outer peripheral surface, and a predetermined length from the other end of the outer peripheral surface toward one end. A convex portion formed on the first housing, and the concave groove and the convex portion when the second casing is stored in the first casing. And an abutting surface with which the concave groove and the convex portion abut on one end side of the second housing, respectively, and depending on the type of the lens, any one of the concave grooves Selecting and inserting the convex portion into contact with the concave groove and the abutting surface of the convex portion to form an image of the light collected by the lens on the image sensor. To do.

In the invention according to claim 2 of the present invention, the in-vehicle camera device further includes a screw, a hole formed on the concave groove, and a screw hole formed on the convex portion. The second housing is housed in the first housing, the contact surfaces of the concave grooves and the convex portions are brought into contact with each other, and the hole and the screw hole penetrate from the outer peripheral surface side. The first housing and the second housing can be fastened by inserting the screw into the hole.

According to a third aspect of the present invention, the in-vehicle camera device further includes a ring-shaped waterproof packing for keeping the inside of the casing in a waterproof structure, and the second casing is provided in the first casing. The waterproof packing is disposed between the inner peripheral surface of the first housing and the outer peripheral surface of the second housing, and closer to the lens than the contact surfaces of all the concave grooves. It is characterized by being.

According to the in-vehicle camera device according to the present invention, by selecting any one of the plurality of concave grooves of the first housing according to the type of the lens, and inserting and contacting the convex portion of the second housing. Since the distance from the lens to the imaging device can be arranged at a position that is an appropriate flange back distance, the in-vehicle camera device can be assembled by a simple operation. Further, since the second casing is stored in the back side of the first casing as the distance of the flange back is shorter, the length of the casing of the in-vehicle camera device can be shortened.

It is a perspective view which shows the components structure of the vehicle-mounted camera apparatus by this invention. It is a perspective view which shows the assembly method of the vehicle-mounted camera apparatus by this invention. It is sectional drawing after the assembly of the vehicle-mounted camera apparatus by this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the accompanying drawings. 1 to 3 show the same in-vehicle camera device, the same parts and structures are given the same reference numerals in the respective drawings. The present invention is not limited to the following embodiments, and can be variously modified without departing from the gist of the present invention.

FIG. 1 is a perspective view showing a component configuration of an in-vehicle camera device according to the present invention. In FIG. 2, the in-vehicle camera apparatus includes a cylindrical first casing 10 that forms the front and side surfaces of the assembled in-vehicle camera apparatus, and a cylindrical second casing 20 that forms the back side of the casing. A ring-shaped waterproof packing 30 for keeping the inside of the housing in a waterproof structure, a screw 40 for fastening the first housing 10 and the second housing 20, and a cable 50 connected to the back surface of the second housing It consists of

The first housing 10 has a lens 11 that captures imaging light at one end that is the front surface, an opening 16 that inserts the second housing 20 at the other end that is the back surface, and the second housing 20 inside the housing. The second housing 20 has an image sensor 21 that converts light imaged from the lens 11 into an electrical signal at one end inside the housing, and a signal output from the image sensor 21. A circuit board 22 to be processed is provided, and the second housing 20 can be inserted into the first housing 10 for storage.

FIG. 2 is a perspective view showing an assembling method of the in-vehicle camera device according to the present invention. The inner peripheral wall of the storage portion 17 of the first housing 10 has a plurality of concave grooves 13a and 13b formed with different lengths from the other end on the opening 16 side toward one end on the front surface side, Holes 15a and 15b respectively formed in 13a and 13b are provided, and the outer wall of the second housing 20 is formed at a predetermined height from the other end on the cable 50 side to one end on the front side. And a waterproof packing mounting portion 26 for mounting the waterproof packing 30 in a groove formed at a predetermined depth along the circumference of the outer peripheral wall. It has. Further, the concave grooves 13a and 13b and the convex portion 23 have a predetermined depth at which the convex portion 23 can be inserted into the concave groove 13a or 13b and the second casing 20 can be stored in the first casing 10. And the height of one end of the concave grooves 13a and 13b on the front side and the one end on the front side of the convex portion 23 are the contact surfaces 14a of the concave grooves that contact the concave grooves and the convex portions, The contact surface 14b and the contact surface 24 of the convex part 23 are provided. Further, when the vehicle-mounted camera is assembled, the waterproof packing mounting portion 26 is provided closer to the lens 11 than the contact surfaces of all the concave grooves.

In FIG. 2, the concave groove 13a corresponds to a lens with a long flange back, and the concave groove 13b corresponds to a lens with a short flange back. Moreover, although the example in which the first housing 10 is provided with two concave grooves has been described, the same applies to the case where three or more concave grooves formed with different lengths are provided.

When assembling the in-vehicle camera device, the waterproof packing 30 is mounted on the packing mounting portion 26 and the second casing 20 is inserted into the opening 16 of the first casing 10. At this time, a predetermined groove is selected from among the plurality of grooves 13a and 13b depending on the type of lens (for example, the lens type is printed on the outer peripheral surface of the first casing that is outside each groove). For example, the second housing 20 is rotated around the optical axis of the lens 11 to align the convex portion 23 to be inserted into the selected concave groove. When the aligned second housing 20 is further pushed into the first housing 10, the contact surface 14 a or 14 b of the concave groove and the contact surface 24 of the convex portion 23 come into contact with each other, and the storage portion 17 of the first housing 10. The second housing 20 can be stored.

The in-vehicle camera device in which the contact surface 14a or 14b of the concave groove and the contact surface 24 of the convex portion 23 are in contact has the flange back distance arranged at an appropriate position according to the type of lens, and the concave groove selected in accordance with the distance. Since the position of the hole 15a or 15b matches the position of the screw hole 25, the screw 40 is inserted into the hole 15a or 15b from the outer peripheral surface of the second casing 20, and the first casing 10 and the second casing 20 can be fastened, and the vehicle-mounted camera device can be assembled by a simple operation. Moreover, since the outer peripheral surface of the waterproof packing 30 is disposed at a position in close contact with all the inner peripheral walls of the second housing, the inside of the in-vehicle camera device can be kept in a waterproof structure.

FIG. 3 is a cross-sectional view after assembly of the in-vehicle camera device according to the present invention. 3A and 3B are in-vehicle camera apparatuses having different lens types, FIG. 3A is an in-vehicle camera apparatus having a long flange back of the lens 11, and FIG. 3B is an in-vehicle camera apparatus having a short flange back of the lens 11. . 3A shows the contact surface 14a of the groove, and FIG. 3B shows the contact surface 14b of the groove on the upper side of each drawing. The length of the housing of the in-vehicle camera device will be described with reference to FIGS. 3A and 3B.

3A and 3B show the same configuration, but the groove 13a in FIG. 3A corresponds to a lens with a long flange back, and the length of the groove 13a is the groove in FIG. 3B. The length from the other end which is the back surface of the first housing 10 to the contact surface 14a of the concave groove is M1, which is shorter than 13b. On the other hand, the groove 13b in FIG. 3B corresponds to a lens with a short flange back, and the length of the groove 13b is longer than the groove 13a in FIG. The length of the concave groove to the contact surface 14b is M2. The difference in length between the groove 13a and the groove 13b (the length M3 determined by M2-M1) is the difference in depth when the second housing 20 is stored in the storage portion 17 of the first housing 10. Thus, the length L1 of the in-vehicle camera device in FIG. 3A in the optical axis direction and the length L2 in the optical axis direction of the in-vehicle camera device in FIG. 3B coincide with the length L3 obtained by L1-L2. Accordingly, the length of the housing of the in-vehicle camera device can be shortened by the difference in length between the concave groove 13a and the concave groove 13b as the lens 11 corresponding to the short flange back corresponds.

DESCRIPTION OF SYMBOLS 10 1st housing | casing 11 Lens 13a, 13b Concave groove 14a, 14b Contact surface 15a of a concave groove, 15b Hole 16 Opening part 17 Storage part 20 Second housing | casing 21 Imaging element 22 Circuit board 23 Convex part 24 Convex part Contact surface 25 Screw hole 26 Packing mounting part 30 Waterproof packing 40 Screw 50 Cable

Claims (3)

  An in-vehicle camera device comprising a cylindrical first casing and a cylindrical second casing stored in the first casing, wherein the first casing has a lens at one end and an opening at the other end Part, a storage part for storing the second housing inside, a predetermined depth in the inner peripheral wall of the storage part, and formed with different lengths from the other end to the one end of the first housing An image sensor that converts light imaged from the lens into an electrical signal at one end, and a circuit board that processes a signal output from the image sensor And a convex portion having a predetermined height on the outer peripheral surface and having a predetermined length from the other end of the outer peripheral surface toward the one end, and the concave groove and the convex portion, When the second housing is stored in the first housing, a contact surface on which the concave groove and the convex portion abut on one end side of the first housing and the second housing is provided. The contact between the concave groove and the convex portion selected by selecting one of the plurality of concave grooves according to the type of the lens and inserting the convex portion. An in-vehicle camera device characterized in that a surface is brought into contact and the light collected by the lens is imaged on the image sensor.   The on-vehicle camera device further includes a screw, a hole formed on the concave groove, and a screw hole formed on the convex portion, and the second casing is stored in the first casing. Then, after contacting the contact surface of the concave groove and the convex portion, the hole and the screw hole penetrate, and the screw is inserted into the hole from the outer peripheral surface side, so that the first housing The vehicle-mounted camera device according to claim 1, wherein a body and the second housing can be fastened. The in-vehicle camera device further includes a ring-shaped waterproof packing for keeping the inside of the casing in a waterproof structure, and when the second casing is stored in the first casing, the waterproof packing is the first casing 2. The vehicle-mounted device according to claim 1, wherein the vehicle is disposed between the inner peripheral surface of the second housing and the outer peripheral surface of the second housing and on the lens side with respect to the contact surfaces of all the concave grooves. Camera device.

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